diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
index 62c0f62..e693bc1 100644
--- a/include/CMakeLists.txt
+++ b/include/CMakeLists.txt
@@ -15,7 +15,7 @@
 
 endif(INSTALL_MBEDTLS_HEADERS)
 
-# Make config.h available in an out-of-source build. ssl-opt.sh requires it.
+# Make mbedtls_config.h available in an out-of-source build. ssl-opt.sh requires it.
 if (ENABLE_TESTING AND NOT ${CMAKE_CURRENT_BINARY_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
     link_to_source(mbedtls)
     link_to_source(psa)
diff --git a/include/mbedtls/aes.h b/include/mbedtls/aes.h
index da741c8..879c3f2 100644
--- a/include/mbedtls/aes.h
+++ b/include/mbedtls/aes.h
@@ -39,12 +39,9 @@
 
 #ifndef MBEDTLS_AES_H
 #define MBEDTLS_AES_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -54,11 +51,14 @@
 #define MBEDTLS_AES_DECRYPT     0 /**< AES decryption. */
 
 /* Error codes in range 0x0020-0x0022 */
-#define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH                -0x0020  /**< Invalid key length. */
-#define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH              -0x0022  /**< Invalid data input length. */
+/** Invalid key length. */
+#define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH                -0x0020
+/** Invalid data input length. */
+#define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH              -0x0022
 
 /* Error codes in range 0x0021-0x0025 */
-#define MBEDTLS_ERR_AES_BAD_INPUT_DATA                    -0x0021  /**< Invalid input data. */
+/** Invalid input data. */
+#define MBEDTLS_ERR_AES_BAD_INPUT_DATA                    -0x0021
 
 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
     !defined(inline) && !defined(__cplusplus)
@@ -78,9 +78,9 @@
  */
 typedef struct mbedtls_aes_context
 {
-    int nr;                     /*!< The number of rounds. */
-    uint32_t *rk;               /*!< AES round keys. */
-    uint32_t buf[68];           /*!< Unaligned data buffer. This buffer can
+    int MBEDTLS_PRIVATE(nr);                     /*!< The number of rounds. */
+    uint32_t *MBEDTLS_PRIVATE(rk);               /*!< AES round keys. */
+    uint32_t MBEDTLS_PRIVATE(buf)[68];           /*!< Unaligned data buffer. This buffer can
                                      hold 32 extra Bytes, which can be used for
                                      one of the following purposes:
                                      <ul><li>Alignment if VIA padlock is
@@ -97,9 +97,9 @@
  */
 typedef struct mbedtls_aes_xts_context
 {
-    mbedtls_aes_context crypt; /*!< The AES context to use for AES block
+    mbedtls_aes_context MBEDTLS_PRIVATE(crypt); /*!< The AES context to use for AES block
                                         encryption or decryption. */
-    mbedtls_aes_context tweak; /*!< The AES context used for tweak
+    mbedtls_aes_context MBEDTLS_PRIVATE(tweak); /*!< The AES context used for tweak
                                         computation. */
 } mbedtls_aes_xts_context;
 #endif /* MBEDTLS_CIPHER_MODE_XTS */
diff --git a/include/mbedtls/arc4.h b/include/mbedtls/arc4.h
deleted file mode 100644
index ada6083..0000000
--- a/include/mbedtls/arc4.h
+++ /dev/null
@@ -1,141 +0,0 @@
-/**
- * \file arc4.h
- *
- * \brief The ARCFOUR stream cipher
- *
- * \warning   ARC4 is considered a weak cipher and its use constitutes a
- *            security risk. We recommend considering stronger ciphers instead.
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- *
- */
-#ifndef MBEDTLS_ARC4_H
-#define MBEDTLS_ARC4_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_ARC4_ALT)
-// Regular implementation
-//
-
-/**
- * \brief     ARC4 context structure
- *
- * \warning   ARC4 is considered a weak cipher and its use constitutes a
- *            security risk. We recommend considering stronger ciphers instead.
- *
- */
-typedef struct mbedtls_arc4_context
-{
-    int x;                      /*!< permutation index */
-    int y;                      /*!< permutation index */
-    unsigned char m[256];       /*!< permutation table */
-}
-mbedtls_arc4_context;
-
-#else  /* MBEDTLS_ARC4_ALT */
-#include "arc4_alt.h"
-#endif /* MBEDTLS_ARC4_ALT */
-
-/**
- * \brief          Initialize ARC4 context
- *
- * \param ctx      ARC4 context to be initialized
- *
- * \warning        ARC4 is considered a weak cipher and its use constitutes a
- *                 security risk. We recommend considering stronger ciphers
- *                 instead.
- *
- */
-void mbedtls_arc4_init( mbedtls_arc4_context *ctx );
-
-/**
- * \brief          Clear ARC4 context
- *
- * \param ctx      ARC4 context to be cleared
- *
- * \warning        ARC4 is considered a weak cipher and its use constitutes a
- *                 security risk. We recommend considering stronger ciphers
- *                 instead.
- *
- */
-void mbedtls_arc4_free( mbedtls_arc4_context *ctx );
-
-/**
- * \brief          ARC4 key schedule
- *
- * \param ctx      ARC4 context to be setup
- * \param key      the secret key
- * \param keylen   length of the key, in bytes
- *
- * \warning        ARC4 is considered a weak cipher and its use constitutes a
- *                 security risk. We recommend considering stronger ciphers
- *                 instead.
- *
- */
-void mbedtls_arc4_setup( mbedtls_arc4_context *ctx, const unsigned char *key,
-                 unsigned int keylen );
-
-/**
- * \brief          ARC4 cipher function
- *
- * \param ctx      ARC4 context
- * \param length   length of the input data
- * \param input    buffer holding the input data
- * \param output   buffer for the output data
- *
- * \return         0 if successful
- *
- * \warning        ARC4 is considered a weak cipher and its use constitutes a
- *                 security risk. We recommend considering stronger ciphers
- *                 instead.
- *
- */
-int mbedtls_arc4_crypt( mbedtls_arc4_context *ctx, size_t length, const unsigned char *input,
-                unsigned char *output );
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/**
- * \brief          Checkup routine
- *
- * \return         0 if successful, or 1 if the test failed
- *
- * \warning        ARC4 is considered a weak cipher and its use constitutes a
- *                 security risk. We recommend considering stronger ciphers
- *                 instead.
- *
- */
-int mbedtls_arc4_self_test( int verbose );
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* arc4.h */
diff --git a/include/mbedtls/aria.h b/include/mbedtls/aria.h
index e984147..1a96d15 100644
--- a/include/mbedtls/aria.h
+++ b/include/mbedtls/aria.h
@@ -28,12 +28,9 @@
 
 #ifndef MBEDTLS_ARIA_H
 #define MBEDTLS_ARIA_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -47,9 +44,11 @@
 #define MBEDTLS_ARIA_MAX_ROUNDS  16 /**< Maxiumum number of rounds in ARIA. */
 #define MBEDTLS_ARIA_MAX_KEYSIZE 32 /**< Maximum size of an ARIA key in bytes. */
 
-#define MBEDTLS_ERR_ARIA_BAD_INPUT_DATA -0x005C /**< Bad input data. */
+/** Bad input data. */
+#define MBEDTLS_ERR_ARIA_BAD_INPUT_DATA -0x005C
 
-#define MBEDTLS_ERR_ARIA_INVALID_INPUT_LENGTH -0x005E /**< Invalid data input length. */
+/** Invalid data input length. */
+#define MBEDTLS_ERR_ARIA_INVALID_INPUT_LENGTH -0x005E
 
 #ifdef __cplusplus
 extern "C" {
@@ -64,9 +63,9 @@
  */
 typedef struct mbedtls_aria_context
 {
-    unsigned char nr;           /*!< The number of rounds (12, 14 or 16) */
+    unsigned char MBEDTLS_PRIVATE(nr);           /*!< The number of rounds (12, 14 or 16) */
     /*! The ARIA round keys. */
-    uint32_t rk[MBEDTLS_ARIA_MAX_ROUNDS + 1][MBEDTLS_ARIA_BLOCKSIZE / 4];
+    uint32_t MBEDTLS_PRIVATE(rk)[MBEDTLS_ARIA_MAX_ROUNDS + 1][MBEDTLS_ARIA_BLOCKSIZE / 4];
 }
 mbedtls_aria_context;
 
diff --git a/include/mbedtls/asn1.h b/include/mbedtls/asn1.h
index d2162fe..f45fc17 100644
--- a/include/mbedtls/asn1.h
+++ b/include/mbedtls/asn1.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_ASN1_H
 #define MBEDTLS_ASN1_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 
@@ -46,13 +43,20 @@
  * ASN1 is a standard to specify data structures.
  * \{
  */
-#define MBEDTLS_ERR_ASN1_OUT_OF_DATA                      -0x0060  /**< Out of data when parsing an ASN1 data structure. */
-#define MBEDTLS_ERR_ASN1_UNEXPECTED_TAG                   -0x0062  /**< ASN1 tag was of an unexpected value. */
-#define MBEDTLS_ERR_ASN1_INVALID_LENGTH                   -0x0064  /**< Error when trying to determine the length or invalid length. */
-#define MBEDTLS_ERR_ASN1_LENGTH_MISMATCH                  -0x0066  /**< Actual length differs from expected length. */
-#define MBEDTLS_ERR_ASN1_INVALID_DATA                     -0x0068  /**< Data is invalid. */
-#define MBEDTLS_ERR_ASN1_ALLOC_FAILED                     -0x006A  /**< Memory allocation failed */
-#define MBEDTLS_ERR_ASN1_BUF_TOO_SMALL                    -0x006C  /**< Buffer too small when writing ASN.1 data structure. */
+/** Out of data when parsing an ASN1 data structure. */
+#define MBEDTLS_ERR_ASN1_OUT_OF_DATA                      -0x0060
+/** ASN1 tag was of an unexpected value. */
+#define MBEDTLS_ERR_ASN1_UNEXPECTED_TAG                   -0x0062
+/** Error when trying to determine the length or invalid length. */
+#define MBEDTLS_ERR_ASN1_INVALID_LENGTH                   -0x0064
+/** Actual length differs from expected length. */
+#define MBEDTLS_ERR_ASN1_LENGTH_MISMATCH                  -0x0066
+/** Data is invalid. */
+#define MBEDTLS_ERR_ASN1_INVALID_DATA                     -0x0068
+/** Memory allocation failed */
+#define MBEDTLS_ERR_ASN1_ALLOC_FAILED                     -0x006A
+/** Buffer too small when writing ASN.1 data structure. */
+#define MBEDTLS_ERR_ASN1_BUF_TOO_SMALL                    -0x006C
 
 /* \} name */
 
@@ -148,9 +152,9 @@
  */
 typedef struct mbedtls_asn1_buf
 {
-    int tag;                /**< ASN1 type, e.g. MBEDTLS_ASN1_UTF8_STRING. */
-    size_t len;             /**< ASN1 length, in octets. */
-    unsigned char *p;       /**< ASN1 data, e.g. in ASCII. */
+    int MBEDTLS_PRIVATE(tag);                /**< ASN1 type, e.g. MBEDTLS_ASN1_UTF8_STRING. */
+    size_t MBEDTLS_PRIVATE(len);             /**< ASN1 length, in octets. */
+    unsigned char *MBEDTLS_PRIVATE(p);       /**< ASN1 data, e.g. in ASCII. */
 }
 mbedtls_asn1_buf;
 
@@ -159,9 +163,9 @@
  */
 typedef struct mbedtls_asn1_bitstring
 {
-    size_t len;                 /**< ASN1 length, in octets. */
-    unsigned char unused_bits;  /**< Number of unused bits at the end of the string */
-    unsigned char *p;           /**< Raw ASN1 data for the bit string */
+    size_t MBEDTLS_PRIVATE(len);                 /**< ASN1 length, in octets. */
+    unsigned char MBEDTLS_PRIVATE(unused_bits);  /**< Number of unused bits at the end of the string */
+    unsigned char *MBEDTLS_PRIVATE(p);           /**< Raw ASN1 data for the bit string */
 }
 mbedtls_asn1_bitstring;
 
@@ -170,8 +174,8 @@
  */
 typedef struct mbedtls_asn1_sequence
 {
-    mbedtls_asn1_buf buf;                   /**< Buffer containing the given ASN.1 item. */
-    struct mbedtls_asn1_sequence *next;    /**< The next entry in the sequence. */
+    mbedtls_asn1_buf MBEDTLS_PRIVATE(buf);                   /**< Buffer containing the given ASN.1 item. */
+    struct mbedtls_asn1_sequence *MBEDTLS_PRIVATE(next);    /**< The next entry in the sequence. */
 }
 mbedtls_asn1_sequence;
 
@@ -180,10 +184,10 @@
  */
 typedef struct mbedtls_asn1_named_data
 {
-    mbedtls_asn1_buf oid;                   /**< The object identifier. */
-    mbedtls_asn1_buf val;                   /**< The named value. */
-    struct mbedtls_asn1_named_data *next;  /**< The next entry in the sequence. */
-    unsigned char next_merged;      /**< Merge next item into the current one? */
+    mbedtls_asn1_buf MBEDTLS_PRIVATE(oid);                   /**< The object identifier. */
+    mbedtls_asn1_buf MBEDTLS_PRIVATE(val);                   /**< The named value. */
+    struct mbedtls_asn1_named_data *MBEDTLS_PRIVATE(next);  /**< The next entry in the sequence. */
+    unsigned char MBEDTLS_PRIVATE(next_merged);      /**< Merge next item into the current one? */
 }
 mbedtls_asn1_named_data;
 
diff --git a/include/mbedtls/asn1write.h b/include/mbedtls/asn1write.h
index fb111ca..d60ca0d 100644
--- a/include/mbedtls/asn1write.h
+++ b/include/mbedtls/asn1write.h
@@ -22,11 +22,7 @@
 #ifndef MBEDTLS_ASN1_WRITE_H
 #define MBEDTLS_ASN1_WRITE_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/asn1.h"
 
diff --git a/include/mbedtls/base64.h b/include/mbedtls/base64.h
index 7e73a8b..8378589 100644
--- a/include/mbedtls/base64.h
+++ b/include/mbedtls/base64.h
@@ -22,16 +22,14 @@
 #ifndef MBEDTLS_BASE64_H
 #define MBEDTLS_BASE64_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 
-#define MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL               -0x002A  /**< Output buffer too small. */
-#define MBEDTLS_ERR_BASE64_INVALID_CHARACTER              -0x002C  /**< Invalid character in input. */
+/** Output buffer too small. */
+#define MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL               -0x002A
+/** Invalid character in input. */
+#define MBEDTLS_ERR_BASE64_INVALID_CHARACTER              -0x002C
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/mbedtls/bignum.h b/include/mbedtls/bignum.h
index 073b4a4..45d3119 100644
--- a/include/mbedtls/bignum.h
+++ b/include/mbedtls/bignum.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_BIGNUM_H
 #define MBEDTLS_BIGNUM_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -35,14 +32,22 @@
 #include <stdio.h>
 #endif
 
-#define MBEDTLS_ERR_MPI_FILE_IO_ERROR                     -0x0002  /**< An error occurred while reading from or writing to a file. */
-#define MBEDTLS_ERR_MPI_BAD_INPUT_DATA                    -0x0004  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_MPI_INVALID_CHARACTER                 -0x0006  /**< There is an invalid character in the digit string. */
-#define MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL                  -0x0008  /**< The buffer is too small to write to. */
-#define MBEDTLS_ERR_MPI_NEGATIVE_VALUE                    -0x000A  /**< The input arguments are negative or result in illegal output. */
-#define MBEDTLS_ERR_MPI_DIVISION_BY_ZERO                  -0x000C  /**< The input argument for division is zero, which is not allowed. */
-#define MBEDTLS_ERR_MPI_NOT_ACCEPTABLE                    -0x000E  /**< The input arguments are not acceptable. */
-#define MBEDTLS_ERR_MPI_ALLOC_FAILED                      -0x0010  /**< Memory allocation failed. */
+/** An error occurred while reading from or writing to a file. */
+#define MBEDTLS_ERR_MPI_FILE_IO_ERROR                     -0x0002
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_MPI_BAD_INPUT_DATA                    -0x0004
+/** There is an invalid character in the digit string. */
+#define MBEDTLS_ERR_MPI_INVALID_CHARACTER                 -0x0006
+/** The buffer is too small to write to. */
+#define MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL                  -0x0008
+/** The input arguments are negative or result in illegal output. */
+#define MBEDTLS_ERR_MPI_NEGATIVE_VALUE                    -0x000A
+/** The input argument for division is zero, which is not allowed. */
+#define MBEDTLS_ERR_MPI_DIVISION_BY_ZERO                  -0x000C
+/** The input arguments are not acceptable. */
+#define MBEDTLS_ERR_MPI_NOT_ACCEPTABLE                    -0x000E
+/** Memory allocation failed. */
+#define MBEDTLS_ERR_MPI_ALLOC_FAILED                      -0x0010
 
 #define MBEDTLS_MPI_CHK(f)       \
     do                           \
@@ -183,9 +188,9 @@
  */
 typedef struct mbedtls_mpi
 {
-    int s;              /*!<  Sign: -1 if the mpi is negative, 1 otherwise */
-    size_t n;           /*!<  total # of limbs  */
-    mbedtls_mpi_uint *p;          /*!<  pointer to limbs  */
+    int MBEDTLS_PRIVATE(s);              /*!<  Sign: -1 if the mpi is negative, 1 otherwise */
+    size_t MBEDTLS_PRIVATE(n);           /*!<  total # of limbs  */
+    mbedtls_mpi_uint *MBEDTLS_PRIVATE(p);          /*!<  pointer to limbs  */
 }
 mbedtls_mpi;
 
@@ -829,14 +834,14 @@
  * \param E        The exponent MPI. This must point to an initialized MPI.
  * \param N        The base for the modular reduction. This must point to an
  *                 initialized MPI.
- * \param _RR      A helper MPI depending solely on \p N which can be used to
+ * \param prec_RR  A helper MPI depending solely on \p N which can be used to
  *                 speed-up multiple modular exponentiations for the same value
  *                 of \p N. This may be \c NULL. If it is not \c NULL, it must
  *                 point to an initialized MPI. If it hasn't been used after
  *                 the call to mbedtls_mpi_init(), this function will compute
- *                 the helper value and store it in \p _RR for reuse on
+ *                 the helper value and store it in \p prec_RR for reuse on
  *                 subsequent calls to this function. Otherwise, the function
- *                 will assume that \p _RR holds the helper value set by a
+ *                 will assume that \p prec_RR holds the helper value set by a
  *                 previous call to mbedtls_mpi_exp_mod(), and reuse it.
  *
  * \return         \c 0 if successful.
@@ -848,7 +853,7 @@
  */
 int mbedtls_mpi_exp_mod( mbedtls_mpi *X, const mbedtls_mpi *A,
                          const mbedtls_mpi *E, const mbedtls_mpi *N,
-                         mbedtls_mpi *_RR );
+                         mbedtls_mpi *prec_RR );
 
 /**
  * \brief          Fill an MPI with a number of random bytes.
@@ -871,6 +876,44 @@
                      int (*f_rng)(void *, unsigned char *, size_t),
                      void *p_rng );
 
+/** Generate a random number uniformly in a range.
+ *
+ * This function generates a random number between \p min inclusive and
+ * \p N exclusive.
+ *
+ * The procedure complies with RFC 6979 §3.3 (deterministic ECDSA)
+ * when the RNG is a suitably parametrized instance of HMAC_DRBG
+ * and \p min is \c 1.
+ *
+ * \note           There are `N - min` possible outputs. The lower bound
+ *                 \p min can be reached, but the upper bound \p N cannot.
+ *
+ * \param X        The destination MPI. This must point to an initialized MPI.
+ * \param min      The minimum value to return.
+ *                 It must be nonnegative.
+ * \param N        The upper bound of the range, exclusive.
+ *                 In other words, this is one plus the maximum value to return.
+ *                 \p N must be strictly larger than \p min.
+ * \param f_rng    The RNG function to use. This must not be \c NULL.
+ * \param p_rng    The RNG parameter to be passed to \p f_rng.
+ *
+ * \return         \c 0 if successful.
+ * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED if a memory allocation failed.
+ * \return         #MBEDTLS_ERR_MPI_BAD_INPUT_DATA if \p min or \p N is invalid
+ *                 or if they are incompatible.
+ * \return         #MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if the implementation was
+ *                 unable to find a suitable value within a limited number
+ *                 of attempts. This has a negligible probability if \p N
+ *                 is significantly larger than \p min, which is the case
+ *                 for all usual cryptographic applications.
+ * \return         Another negative error code on failure.
+ */
+int mbedtls_mpi_random( mbedtls_mpi *X,
+                        mbedtls_mpi_sint min,
+                        const mbedtls_mpi *N,
+                        int (*f_rng)(void *, unsigned char *, size_t),
+                        void *p_rng );
+
 /**
  * \brief          Compute the greatest common divisor: G = gcd(A, B)
  *
diff --git a/include/mbedtls/blowfish.h b/include/mbedtls/blowfish.h
deleted file mode 100644
index 1ade1fc..0000000
--- a/include/mbedtls/blowfish.h
+++ /dev/null
@@ -1,278 +0,0 @@
-/**
- * \file blowfish.h
- *
- * \brief Blowfish block cipher
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-#ifndef MBEDTLS_BLOWFISH_H
-#define MBEDTLS_BLOWFISH_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "mbedtls/platform_util.h"
-
-#define MBEDTLS_BLOWFISH_ENCRYPT     1
-#define MBEDTLS_BLOWFISH_DECRYPT     0
-#define MBEDTLS_BLOWFISH_MAX_KEY_BITS     448
-#define MBEDTLS_BLOWFISH_MIN_KEY_BITS     32
-#define MBEDTLS_BLOWFISH_ROUNDS      16         /**< Rounds to use. When increasing this value, make sure to extend the initialisation vectors */
-#define MBEDTLS_BLOWFISH_BLOCKSIZE   8          /* Blowfish uses 64 bit blocks */
-
-#define MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA -0x0016 /**< Bad input data. */
-
-#define MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018 /**< Invalid data input length. */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_BLOWFISH_ALT)
-// Regular implementation
-//
-
-/**
- * \brief          Blowfish context structure
- */
-typedef struct mbedtls_blowfish_context
-{
-    uint32_t P[MBEDTLS_BLOWFISH_ROUNDS + 2];    /*!<  Blowfish round keys    */
-    uint32_t S[4][256];                 /*!<  key dependent S-boxes  */
-}
-mbedtls_blowfish_context;
-
-#else  /* MBEDTLS_BLOWFISH_ALT */
-#include "blowfish_alt.h"
-#endif /* MBEDTLS_BLOWFISH_ALT */
-
-/**
- * \brief          Initialize a Blowfish context.
- *
- * \param ctx      The Blowfish context to be initialized.
- *                 This must not be \c NULL.
- */
-void mbedtls_blowfish_init( mbedtls_blowfish_context *ctx );
-
-/**
- * \brief          Clear a Blowfish context.
- *
- * \param ctx      The Blowfish context to be cleared.
- *                 This may be \c NULL, in which case this function
- *                 returns immediately. If it is not \c NULL, it must
- *                 point to an initialized Blowfish context.
- */
-void mbedtls_blowfish_free( mbedtls_blowfish_context *ctx );
-
-/**
- * \brief          Perform a Blowfish key schedule operation.
- *
- * \param ctx      The Blowfish context to perform the key schedule on.
- * \param key      The encryption key. This must be a readable buffer of
- *                 length \p keybits Bits.
- * \param keybits  The length of \p key in Bits. This must be between
- *                 \c 32 and \c 448 and a multiple of \c 8.
- *
- * \return         \c 0 if successful.
- * \return         A negative error code on failure.
- */
-int mbedtls_blowfish_setkey( mbedtls_blowfish_context *ctx, const unsigned char *key,
-                     unsigned int keybits );
-
-/**
- * \brief          Perform a Blowfish-ECB block encryption/decryption operation.
- *
- * \param ctx      The Blowfish context to use. This must be initialized
- *                 and bound to a key.
- * \param mode     The mode of operation. Possible values are
- *                 #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
- *                 #MBEDTLS_BLOWFISH_DECRYPT for decryption.
- * \param input    The input block. This must be a readable buffer
- *                 of size \c 8 Bytes.
- * \param output   The output block. This must be a writable buffer
- *                 of size \c 8 Bytes.
- *
- * \return         \c 0 if successful.
- * \return         A negative error code on failure.
- */
-int mbedtls_blowfish_crypt_ecb( mbedtls_blowfish_context *ctx,
-                        int mode,
-                        const unsigned char input[MBEDTLS_BLOWFISH_BLOCKSIZE],
-                        unsigned char output[MBEDTLS_BLOWFISH_BLOCKSIZE] );
-
-#if defined(MBEDTLS_CIPHER_MODE_CBC)
-/**
- * \brief          Perform a Blowfish-CBC buffer encryption/decryption operation.
- *
- * \note           Upon exit, the content of the IV is updated so that you can
- *                 call the function same function again on the following
- *                 block(s) of data and get the same result as if it was
- *                 encrypted in one call. This allows a "streaming" usage.
- *                 If on the other hand you need to retain the contents of the
- *                 IV, you should either save it manually or use the cipher
- *                 module instead.
- *
- * \param ctx      The Blowfish context to use. This must be initialized
- *                 and bound to a key.
- * \param mode     The mode of operation. Possible values are
- *                 #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
- *                 #MBEDTLS_BLOWFISH_DECRYPT for decryption.
- * \param length   The length of the input data in Bytes. This must be
- *                 multiple of \c 8.
- * \param iv       The initialization vector. This must be a read/write buffer
- *                 of length \c 8 Bytes. It is updated by this function.
- * \param input    The input data. This must be a readable buffer of length
- *                 \p length Bytes.
- * \param output   The output data. This must be a writable buffer of length
- *                 \p length Bytes.
- *
- * \return         \c 0 if successful.
- * \return         A negative error code on failure.
- */
-int mbedtls_blowfish_crypt_cbc( mbedtls_blowfish_context *ctx,
-                        int mode,
-                        size_t length,
-                        unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
-                        const unsigned char *input,
-                        unsigned char *output );
-#endif /* MBEDTLS_CIPHER_MODE_CBC */
-
-#if defined(MBEDTLS_CIPHER_MODE_CFB)
-/**
- * \brief          Perform a Blowfish CFB buffer encryption/decryption operation.
- *
- * \note           Upon exit, the content of the IV is updated so that you can
- *                 call the function same function again on the following
- *                 block(s) of data and get the same result as if it was
- *                 encrypted in one call. This allows a "streaming" usage.
- *                 If on the other hand you need to retain the contents of the
- *                 IV, you should either save it manually or use the cipher
- *                 module instead.
- *
- * \param ctx      The Blowfish context to use. This must be initialized
- *                 and bound to a key.
- * \param mode     The mode of operation. Possible values are
- *                 #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
- *                 #MBEDTLS_BLOWFISH_DECRYPT for decryption.
- * \param length   The length of the input data in Bytes.
- * \param iv_off   The offset in the initialiation vector.
- *                 The value pointed to must be smaller than \c 8 Bytes.
- *                 It is updated by this function to support the aforementioned
- *                 streaming usage.
- * \param iv       The initialization vector. This must be a read/write buffer
- *                 of size \c 8 Bytes. It is updated after use.
- * \param input    The input data. This must be a readable buffer of length
- *                 \p length Bytes.
- * \param output   The output data. This must be a writable buffer of length
- *                 \p length Bytes.
- *
- * \return         \c 0 if successful.
- * \return         A negative error code on failure.
- */
-int mbedtls_blowfish_crypt_cfb64( mbedtls_blowfish_context *ctx,
-                          int mode,
-                          size_t length,
-                          size_t *iv_off,
-                          unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
-                          const unsigned char *input,
-                          unsigned char *output );
-#endif /*MBEDTLS_CIPHER_MODE_CFB */
-
-#if defined(MBEDTLS_CIPHER_MODE_CTR)
-/**
- * \brief      Perform a Blowfish-CTR buffer encryption/decryption operation.
- *
- * \warning    You must never reuse a nonce value with the same key. Doing so
- *             would void the encryption for the two messages encrypted with
- *             the same nonce and key.
- *
- *             There are two common strategies for managing nonces with CTR:
- *
- *             1. You can handle everything as a single message processed over
- *             successive calls to this function. In that case, you want to
- *             set \p nonce_counter and \p nc_off to 0 for the first call, and
- *             then preserve the values of \p nonce_counter, \p nc_off and \p
- *             stream_block across calls to this function as they will be
- *             updated by this function.
- *
- *             With this strategy, you must not encrypt more than 2**64
- *             blocks of data with the same key.
- *
- *             2. You can encrypt separate messages by dividing the \p
- *             nonce_counter buffer in two areas: the first one used for a
- *             per-message nonce, handled by yourself, and the second one
- *             updated by this function internally.
- *
- *             For example, you might reserve the first 4 bytes for the
- *             per-message nonce, and the last 4 bytes for internal use. In that
- *             case, before calling this function on a new message you need to
- *             set the first 4 bytes of \p nonce_counter to your chosen nonce
- *             value, the last 4 to 0, and \p nc_off to 0 (which will cause \p
- *             stream_block to be ignored). That way, you can encrypt at most
- *             2**32 messages of up to 2**32 blocks each with the same key.
- *
- *             The per-message nonce (or information sufficient to reconstruct
- *             it) needs to be communicated with the ciphertext and must be unique.
- *             The recommended way to ensure uniqueness is to use a message
- *             counter.
- *
- *             Note that for both stategies, sizes are measured in blocks and
- *             that a Blowfish block is 8 bytes.
- *
- * \warning    Upon return, \p stream_block contains sensitive data. Its
- *             content must not be written to insecure storage and should be
- *             securely discarded as soon as it's no longer needed.
- *
- * \param ctx           The Blowfish context to use. This must be initialized
- *                      and bound to a key.
- * \param length        The length of the input data in Bytes.
- * \param nc_off        The offset in the current stream_block (for resuming
- *                      within current cipher stream). The offset pointer
- *                      should be \c 0 at the start of a stream and must be
- *                      smaller than \c 8. It is updated by this function.
- * \param nonce_counter The 64-bit nonce and counter. This must point to a
- *                      read/write buffer of length \c 8 Bytes.
- * \param stream_block  The saved stream-block for resuming. This must point to
- *                      a read/write buffer of length \c 8 Bytes.
- * \param input         The input data. This must be a readable buffer of
- *                      length \p length Bytes.
- * \param output        The output data. This must be a writable buffer of
- *                      length \p length Bytes.
- *
- * \return              \c 0 if successful.
- * \return              A negative error code on failure.
- */
-int mbedtls_blowfish_crypt_ctr( mbedtls_blowfish_context *ctx,
-                        size_t length,
-                        size_t *nc_off,
-                        unsigned char nonce_counter[MBEDTLS_BLOWFISH_BLOCKSIZE],
-                        unsigned char stream_block[MBEDTLS_BLOWFISH_BLOCKSIZE],
-                        const unsigned char *input,
-                        unsigned char *output );
-#endif /* MBEDTLS_CIPHER_MODE_CTR */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* blowfish.h */
diff --git a/include/mbedtls/build_info.h b/include/mbedtls/build_info.h
new file mode 100644
index 0000000..23f85ba
--- /dev/null
+++ b/include/mbedtls/build_info.h
@@ -0,0 +1,83 @@
+/**
+ * \file build_info.h
+ *
+ * \brief Build-time configuration info
+ *
+ *  Include this file if you need to depend on the
+ *  configuration options defined in mbedtls_config.h or MBEDTLS_CONFIG_FILE
+ */
+ /*
+  *  Copyright The Mbed TLS Contributors
+  *  SPDX-License-Identifier: Apache-2.0
+  *
+  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+  *  not use this file except in compliance with the License.
+  *  You may obtain a copy of the License at
+  *
+  *  http://www.apache.org/licenses/LICENSE-2.0
+  *
+  *  Unless required by applicable law or agreed to in writing, software
+  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  *  See the License for the specific language governing permissions and
+  *  limitations under the License.
+  */
+
+#ifndef MBEDTLS_BUILD_INFO_H
+#define MBEDTLS_BUILD_INFO_H
+
+/*
+ * This set of compile-time defines can be used to determine the version number
+ * of the Mbed TLS library used. Run-time variables for the same can be found in
+ * version.h
+ */
+
+/**
+ * The version number x.y.z is split into three parts.
+ * Major, Minor, Patchlevel
+ */
+#define MBEDTLS_VERSION_MAJOR  3
+#define MBEDTLS_VERSION_MINOR  0
+#define MBEDTLS_VERSION_PATCH  0
+
+/**
+ * The single version number has the following structure:
+ *    MMNNPP00
+ *    Major version | Minor version | Patch version
+ */
+#define MBEDTLS_VERSION_NUMBER         0x03000000
+#define MBEDTLS_VERSION_STRING         "3.0.0"
+#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 3.0.0"
+
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
+#define _CRT_SECURE_NO_DEPRECATE 1
+#endif
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/mbedtls_config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_CONFIG_VERSION) && ( \
+    MBEDTLS_CONFIG_VERSION < 0x03000000 || \
+    MBEDTLS_CONFIG_VERSION > MBEDTLS_VERSION_NUMBER )
+#error "Invalid config version, defined value of MBEDTLS_CONFIG_VERSION is unsupported"
+#endif
+
+/* Target and application specific configurations
+ *
+ * Allow user to override any previous default.
+ *
+ */
+#if defined(MBEDTLS_USER_CONFIG_FILE)
+#include MBEDTLS_USER_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_PSA_CRYPTO_CONFIG)
+#include "mbedtls/config_psa.h"
+#endif
+
+#include "mbedtls/check_config.h"
+
+#endif /* MBEDTLS_BUILD_INFO_H */
diff --git a/include/mbedtls/camellia.h b/include/mbedtls/camellia.h
index dee5c3e..6feeaf0 100644
--- a/include/mbedtls/camellia.h
+++ b/include/mbedtls/camellia.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_CAMELLIA_H
 #define MBEDTLS_CAMELLIA_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -36,9 +33,11 @@
 #define MBEDTLS_CAMELLIA_ENCRYPT     1
 #define MBEDTLS_CAMELLIA_DECRYPT     0
 
-#define MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA -0x0024 /**< Bad input data. */
+/** Bad input data. */
+#define MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA -0x0024
 
-#define MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH -0x0026 /**< Invalid data input length. */
+/** Invalid data input length. */
+#define MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH -0x0026
 
 #ifdef __cplusplus
 extern "C" {
@@ -53,8 +52,8 @@
  */
 typedef struct mbedtls_camellia_context
 {
-    int nr;                     /*!<  number of rounds  */
-    uint32_t rk[68];            /*!<  CAMELLIA round keys    */
+    int MBEDTLS_PRIVATE(nr);                     /*!<  number of rounds  */
+    uint32_t MBEDTLS_PRIVATE(rk)[68];            /*!<  CAMELLIA round keys    */
 }
 mbedtls_camellia_context;
 
diff --git a/include/mbedtls/ccm.h b/include/mbedtls/ccm.h
index f63e61b..6f991fe 100644
--- a/include/mbedtls/ccm.h
+++ b/include/mbedtls/ccm.h
@@ -46,17 +46,21 @@
 
 #ifndef MBEDTLS_CCM_H
 #define MBEDTLS_CCM_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/cipher.h"
 
-#define MBEDTLS_ERR_CCM_BAD_INPUT       -0x000D /**< Bad input parameters to the function. */
-#define MBEDTLS_ERR_CCM_AUTH_FAILED     -0x000F /**< Authenticated decryption failed. */
+#define MBEDTLS_CCM_DECRYPT       0
+#define MBEDTLS_CCM_ENCRYPT       1
+#define MBEDTLS_CCM_STAR_DECRYPT  2
+#define MBEDTLS_CCM_STAR_ENCRYPT  3
+
+/** Bad input parameters to the function. */
+#define MBEDTLS_ERR_CCM_BAD_INPUT       -0x000D
+/** Authenticated decryption failed. */
+#define MBEDTLS_ERR_CCM_AUTH_FAILED     -0x000F
 
 #ifdef __cplusplus
 extern "C" {
@@ -72,7 +76,27 @@
  */
 typedef struct mbedtls_ccm_context
 {
-    mbedtls_cipher_context_t cipher_ctx;    /*!< The cipher context used. */
+    unsigned char MBEDTLS_PRIVATE(y)[16];    /*!< The Y working buffer */
+    unsigned char MBEDTLS_PRIVATE(ctr)[16];  /*!< The counter buffer */
+    mbedtls_cipher_context_t MBEDTLS_PRIVATE(cipher_ctx);    /*!< The cipher context used. */
+    size_t MBEDTLS_PRIVATE(plaintext_len);   /*!< Total plaintext length */
+    size_t MBEDTLS_PRIVATE(add_len);         /*!< Total authentication data length */
+    size_t MBEDTLS_PRIVATE(tag_len);         /*!< Total tag length */
+    size_t MBEDTLS_PRIVATE(processed);       /*!< Track how many bytes of input data
+                                                  were processed (chunked input).
+                                                  Used independently for both auth data
+                                                  and plaintext/ciphertext.
+                                                  This variable is set to zero after
+                                                  auth data input is finished. */
+    unsigned char MBEDTLS_PRIVATE(q);        /*!< The Q working value */
+    unsigned char MBEDTLS_PRIVATE(mode);     /*!< The operation to perform:
+                                                  #MBEDTLS_CCM_ENCRYPT or
+                                                  #MBEDTLS_CCM_DECRYPT or
+                                                  #MBEDTLS_CCM_STAR_ENCRYPT or
+                                                  #MBEDTLS_CCM_STAR_DECRYPT. */
+    int MBEDTLS_PRIVATE(state);              /*!< Working value holding context's
+                                                  state. Used for chunked data
+                                                  input */
 }
 mbedtls_ccm_context;
 
@@ -133,10 +157,10 @@
  * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
  *                  or 13. The length L of the message length field is
  *                  15 - \p iv_len.
- * \param add       The additional data field. If \p add_len is greater than
- *                  zero, \p add must be a readable buffer of at least that
+ * \param ad        The additional data field. If \p ad_len is greater than
+ *                  zero, \p ad must be a readable buffer of at least that
  *                  length.
- * \param add_len   The length of additional data in Bytes.
+ * \param ad_len    The length of additional data in Bytes.
  *                  This must be less than `2^16 - 2^8`.
  * \param input     The buffer holding the input data. If \p length is greater
  *                  than zero, \p input must be a readable buffer of at least
@@ -154,7 +178,7 @@
  */
 int mbedtls_ccm_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
                          const unsigned char *iv, size_t iv_len,
-                         const unsigned char *add, size_t add_len,
+                         const unsigned char *ad, size_t ad_len,
                          const unsigned char *input, unsigned char *output,
                          unsigned char *tag, size_t tag_len );
 
@@ -179,9 +203,9 @@
  * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
  *                  or 13. The length L of the message length field is
  *                  15 - \p iv_len.
- * \param add       The additional data field. This must be a readable buffer of
- *                  at least \p add_len Bytes.
- * \param add_len   The length of additional data in Bytes.
+ * \param ad        The additional data field. This must be a readable buffer of
+ *                  at least \p ad_len Bytes.
+ * \param ad_len    The length of additional data in Bytes.
  *                  This must be less than 2^16 - 2^8.
  * \param input     The buffer holding the input data. If \p length is greater
  *                  than zero, \p input must be a readable buffer of at least
@@ -202,7 +226,7 @@
  */
 int mbedtls_ccm_star_encrypt_and_tag( mbedtls_ccm_context *ctx, size_t length,
                          const unsigned char *iv, size_t iv_len,
-                         const unsigned char *add, size_t add_len,
+                         const unsigned char *ad, size_t ad_len,
                          const unsigned char *input, unsigned char *output,
                          unsigned char *tag, size_t tag_len );
 
@@ -218,9 +242,9 @@
  * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
  *                  or 13. The length L of the message length field is
  *                  15 - \p iv_len.
- * \param add       The additional data field. This must be a readable buffer
- *                  of at least that \p add_len Bytes..
- * \param add_len   The length of additional data in Bytes.
+ * \param ad        The additional data field. This must be a readable buffer
+ *                  of at least that \p ad_len Bytes..
+ * \param ad_len    The length of additional data in Bytes.
  *                  This must be less than 2^16 - 2^8.
  * \param input     The buffer holding the input data. If \p length is greater
  *                  than zero, \p input must be a readable buffer of at least
@@ -239,7 +263,7 @@
  */
 int mbedtls_ccm_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
                       const unsigned char *iv, size_t iv_len,
-                      const unsigned char *add, size_t add_len,
+                      const unsigned char *ad, size_t ad_len,
                       const unsigned char *input, unsigned char *output,
                       const unsigned char *tag, size_t tag_len );
 
@@ -260,9 +284,9 @@
  * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
  *                  or 13. The length L of the message length field is
  *                  15 - \p iv_len.
- * \param add       The additional data field. This must be a readable buffer of
- *                  at least that \p add_len Bytes.
- * \param add_len   The length of additional data in Bytes.
+ * \param ad        The additional data field. This must be a readable buffer of
+ *                  at least that \p ad_len Bytes.
+ * \param ad_len    The length of additional data in Bytes.
  *                  This must be less than 2^16 - 2^8.
  * \param input     The buffer holding the input data. If \p length is greater
  *                  than zero, \p input must be a readable buffer of at least
@@ -284,10 +308,211 @@
  */
 int mbedtls_ccm_star_auth_decrypt( mbedtls_ccm_context *ctx, size_t length,
                       const unsigned char *iv, size_t iv_len,
-                      const unsigned char *add, size_t add_len,
+                      const unsigned char *ad, size_t ad_len,
                       const unsigned char *input, unsigned char *output,
                       const unsigned char *tag, size_t tag_len );
 
+/**
+ * \brief           This function starts a CCM encryption or decryption
+ *                  operation.
+ *
+ *                  This function and mbedtls_ccm_set_lengths() must be called
+ *                  before calling mbedtls_ccm_update_ad() or
+ *                  mbedtls_ccm_update(). This function can be called before
+ *                  or after mbedtls_ccm_set_lengths().
+ *
+ * \note            This function is not implemented in Mbed TLS yet.
+ *
+ * \param ctx       The CCM context. This must be initialized.
+ * \param mode      The operation to perform: #MBEDTLS_CCM_ENCRYPT or
+ *                  #MBEDTLS_CCM_DECRYPT or #MBEDTLS_CCM_STAR_ENCRYPT or
+ *                  #MBEDTLS_CCM_STAR_DECRYPT.
+ * \param iv        The initialization vector. This must be a readable buffer
+ *                  of at least \p iv_len Bytes.
+ * \param iv_len    The length of the nonce in Bytes: 7, 8, 9, 10, 11, 12,
+ *                  or 13. The length L of the message length field is
+ *                  15 - \p iv_len.
+ *
+ * \return          \c 0 on success.
+ * \return          #MBEDTLS_ERR_CCM_BAD_INPUT on failure:
+ *                  \p ctx is in an invalid state,
+ *                  \p mode is invalid,
+ *                  \p iv_len is invalid (lower than \c 7 or greater than
+ *                  \c 13).
+ */
+int mbedtls_ccm_starts( mbedtls_ccm_context *ctx,
+                        int mode,
+                        const unsigned char *iv,
+                        size_t iv_len );
+
+/**
+ * \brief           This function declares the lengths of the message
+ *                  and additional data for a CCM encryption or decryption
+ *                  operation.
+ *
+ *                  This function and mbedtls_ccm_starts() must be called
+ *                  before calling mbedtls_ccm_update_ad() or
+ *                  mbedtls_ccm_update(). This function can be called before
+ *                  or after mbedtls_ccm_starts().
+ *
+ * \note            This function is not implemented in Mbed TLS yet.
+ *
+ * \param ctx       The CCM context. This must be initialized.
+ * \param total_ad_len   The total length of additional data in bytes.
+ *                       This must be less than `2^16 - 2^8`.
+ * \param plaintext_len  The length in bytes of the plaintext to encrypt or
+ *                       result of the decryption (thus not encompassing the
+ *                       additional data that are not encrypted).
+ * \param tag_len   The length of the tag to generate in Bytes:
+ *                  4, 6, 8, 10, 12, 14 or 16.
+ *                  For CCM*, zero is also valid.
+ *
+ * \return          \c 0 on success.
+ * \return          #MBEDTLS_ERR_CCM_BAD_INPUT on failure:
+ *                  \p ctx is in an invalid state,
+ *                  \p total_ad_len is greater than \c 0xFF00.
+ */
+int mbedtls_ccm_set_lengths( mbedtls_ccm_context *ctx,
+                             size_t total_ad_len,
+                             size_t plaintext_len,
+                             size_t tag_len );
+
+/**
+ * \brief           This function feeds an input buffer as associated data
+ *                  (authenticated but not encrypted data) in a CCM
+ *                  encryption or decryption operation.
+ *
+ *                  You may call this function zero, one or more times
+ *                  to pass successive parts of the additional data. The
+ *                  lengths \p ad_len of the data parts should eventually add
+ *                  up exactly to the total length of additional data
+ *                  \c total_ad_len passed to mbedtls_ccm_set_lengths(). You
+ *                  may not call this function after calling
+ *                  mbedtls_ccm_update().
+ *
+ * \note            This function is not implemented in Mbed TLS yet.
+ *
+ * \param ctx       The CCM context. This must have been started with
+ *                  mbedtls_ccm_starts(), the lengths of the message and
+ *                  additional data must have been declared with
+ *                  mbedtls_ccm_set_lengths() and this must not have yet
+ *                  received any input with mbedtls_ccm_update().
+ * \param ad        The buffer holding the additional data, or \c NULL
+ *                  if \p ad_len is \c 0.
+ * \param ad_len    The length of the additional data. If \c 0,
+ *                  \p ad may be \c NULL.
+ *
+ * \return          \c 0 on success.
+ * \return          #MBEDTLS_ERR_CCM_BAD_INPUT on failure:
+ *                  \p ctx is in an invalid state,
+ *                  total input length too long.
+ */
+int mbedtls_ccm_update_ad( mbedtls_ccm_context *ctx,
+                           const unsigned char *ad,
+                           size_t ad_len );
+
+/**
+ * \brief           This function feeds an input buffer into an ongoing CCM
+ *                  encryption or decryption operation.
+ *
+ *                  You may call this function zero, one or more times
+ *                  to pass successive parts of the input: the plaintext to
+ *                  encrypt, or the ciphertext (not including the tag) to
+ *                  decrypt. After the last part of the input, call
+ *                  mbedtls_ccm_finish(). The lengths \p input_len of the
+ *                  data parts should eventually add up exactly to the
+ *                  plaintext length \c plaintext_len passed to
+ *                  mbedtls_ccm_set_lengths().
+ *
+ *                  This function may produce output in one of the following
+ *                  ways:
+ *                  - Immediate output: the output length is always equal
+ *                    to the input length.
+ *                  - Buffered output: except for the last part of input data,
+ *                    the output consists of a whole number of 16-byte blocks.
+ *                    If the total input length so far (not including
+ *                    associated data) is 16 \* *B* + *A* with *A* < 16 then
+ *                    the total output length is 16 \* *B*.
+ *                    For the last part of input data, the output length is
+ *                    equal to the input length plus the number of bytes (*A*)
+ *                    buffered in the previous call to the function (if any).
+ *                    The function uses the plaintext length
+ *                    \c plaintext_len passed to mbedtls_ccm_set_lengths()
+ *                    to detect the last part of input data.
+ *
+ *                  In particular:
+ *                  - It is always correct to call this function with
+ *                    \p output_size >= \p input_len + 15.
+ *                  - If \p input_len is a multiple of 16 for all the calls
+ *                    to this function during an operation (not necessary for
+ *                    the last one) then it is correct to use \p output_size
+ *                    =\p input_len.
+ *
+ * \note            This function is not implemented in Mbed TLS yet.
+ *
+ * \param ctx           The CCM context. This must have been started with
+ *                      mbedtls_ccm_starts() and the lengths of the message and
+ *                      additional data must have been declared with
+ *                      mbedtls_ccm_set_lengths().
+ * \param input         The buffer holding the input data. If \p input_len
+ *                      is greater than zero, this must be a readable buffer
+ *                      of at least \p input_len bytes.
+ * \param input_len     The length of the input data in bytes.
+ * \param output        The buffer for the output data. If \p output_size
+ *                      is greater than zero, this must be a writable buffer of
+ *                      at least \p output_size bytes.
+ * \param output_size   The size of the output buffer in bytes.
+ *                      See the function description regarding the output size.
+ * \param output_len    On success, \p *output_len contains the actual
+ *                      length of the output written in \p output.
+ *                      On failure, the content of \p *output_len is
+ *                      unspecified.
+ *
+ * \return         \c 0 on success.
+ * \return         #MBEDTLS_ERR_CCM_BAD_INPUT on failure:
+ *                 \p ctx is in an invalid state,
+ *                 total input length too long,
+ *                 or \p output_size too small.
+ */
+int mbedtls_ccm_update( mbedtls_ccm_context *ctx,
+                        const unsigned char *input, size_t input_len,
+                        unsigned char *output, size_t output_size,
+                        size_t *output_len );
+
+/**
+ * \brief           This function finishes the CCM operation and generates
+ *                  the authentication tag.
+ *
+ *                  It wraps up the CCM stream, and generates the
+ *                  tag. The tag can have a maximum length of 16 Bytes.
+ *
+ * \note            This function is not implemented in Mbed TLS yet.
+ *
+ * \param ctx       The CCM context. This must have been started with
+ *                  mbedtls_ccm_starts() and the lengths of the message and
+ *                  additional data must have been declared with
+ *                  mbedtls_ccm_set_lengths().
+ * \param tag       The buffer for holding the tag. If \p tag_len is greater
+ *                  than zero, this must be a writable buffer of at least \p
+ *                  tag_len Bytes.
+ * \param tag_len   The length of the tag. Must match the tag length passed to
+ *                  mbedtls_ccm_set_lengths() function.
+ *
+ * \return          \c 0 on success.
+ * \return          #MBEDTLS_ERR_CCM_BAD_INPUT on failure:
+ *                  \p ctx is in an invalid state,
+ *                  invalid value of \p tag_len,
+ *                  the total amount of additional data passed to
+ *                  mbedtls_ccm_update_ad() was lower than the total length of
+ *                  additional data \c total_ad_len passed to
+ *                  mbedtls_ccm_set_lengths(),
+ *                  the total amount of input data passed to
+ *                  mbedtls_ccm_update() was lower than the plaintext length
+ *                  \c plaintext_len passed to mbedtls_ccm_set_lengths().
+ */
+int mbedtls_ccm_finish( mbedtls_ccm_context *ctx,
+                        unsigned char *tag, size_t tag_len );
+
 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
 /**
  * \brief          The CCM checkup routine.
diff --git a/include/mbedtls/chacha20.h b/include/mbedtls/chacha20.h
index a6a8cda..8af16ed 100644
--- a/include/mbedtls/chacha20.h
+++ b/include/mbedtls/chacha20.h
@@ -31,17 +31,15 @@
 
 #ifndef MBEDTLS_CHACHA20_H
 #define MBEDTLS_CHACHA20_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stdint.h>
 #include <stddef.h>
 
-#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA         -0x0051 /**< Invalid input parameter(s). */
+/** Invalid input parameter(s). */
+#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA         -0x0051
 
 #ifdef __cplusplus
 extern "C" {
@@ -51,9 +49,9 @@
 
 typedef struct mbedtls_chacha20_context
 {
-    uint32_t state[16];          /*! The state (before round operations). */
-    uint8_t  keystream8[64];     /*! Leftover keystream bytes. */
-    size_t keystream_bytes_used; /*! Number of keystream bytes already used. */
+    uint32_t MBEDTLS_PRIVATE(state)[16];          /*! The state (before round operations). */
+    uint8_t  MBEDTLS_PRIVATE(keystream8)[64];     /*! Leftover keystream bytes. */
+    size_t MBEDTLS_PRIVATE(keystream_bytes_used); /*! Number of keystream bytes already used. */
 }
 mbedtls_chacha20_context;
 
diff --git a/include/mbedtls/chachapoly.h b/include/mbedtls/chachapoly.h
index 1007f95..3f4318f 100644
--- a/include/mbedtls/chachapoly.h
+++ b/include/mbedtls/chachapoly.h
@@ -31,18 +31,17 @@
 
 #ifndef MBEDTLS_CHACHAPOLY_H
 #define MBEDTLS_CHACHAPOLY_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 /* for shared error codes */
 #include "mbedtls/poly1305.h"
 
-#define MBEDTLS_ERR_CHACHAPOLY_BAD_STATE            -0x0054 /**< The requested operation is not permitted in the current state. */
-#define MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED          -0x0056 /**< Authenticated decryption failed: data was not authentic. */
+/** The requested operation is not permitted in the current state. */
+#define MBEDTLS_ERR_CHACHAPOLY_BAD_STATE            -0x0054
+/** Authenticated decryption failed: data was not authentic. */
+#define MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED          -0x0056
 
 #ifdef __cplusplus
 extern "C" {
@@ -61,12 +60,12 @@
 
 typedef struct mbedtls_chachapoly_context
 {
-    mbedtls_chacha20_context chacha20_ctx;  /**< The ChaCha20 context. */
-    mbedtls_poly1305_context poly1305_ctx;  /**< The Poly1305 context. */
-    uint64_t aad_len;                       /**< The length (bytes) of the Additional Authenticated Data. */
-    uint64_t ciphertext_len;                /**< The length (bytes) of the ciphertext. */
-    int state;                              /**< The current state of the context. */
-    mbedtls_chachapoly_mode_t mode;         /**< Cipher mode (encrypt or decrypt). */
+    mbedtls_chacha20_context MBEDTLS_PRIVATE(chacha20_ctx);  /**< The ChaCha20 context. */
+    mbedtls_poly1305_context MBEDTLS_PRIVATE(poly1305_ctx);  /**< The Poly1305 context. */
+    uint64_t MBEDTLS_PRIVATE(aad_len);                       /**< The length (bytes) of the Additional Authenticated Data. */
+    uint64_t MBEDTLS_PRIVATE(ciphertext_len);                /**< The length (bytes) of the ciphertext. */
+    int MBEDTLS_PRIVATE(state);                              /**< The current state of the context. */
+    mbedtls_chachapoly_mode_t MBEDTLS_PRIVATE(mode);         /**< Cipher mode (encrypt or decrypt). */
 }
 mbedtls_chachapoly_context;
 
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index ae23602..84afcf0 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -20,11 +20,6 @@
  *  limitations under the License.
  */
 
-/*
- * It is recommended to include this file from your config.h
- * in order to catch dependency issues early.
- */
-
 #ifndef MBEDTLS_CHECK_CONFIG_H
 #define MBEDTLS_CHECK_CONFIG_H
 
@@ -42,7 +37,7 @@
 #error "MBEDTLS_PLATFORM_C is required on Windows"
 #endif
 
-/* Fix the config here. Not convenient to put an #ifdef _WIN32 in config.h as
+/* Fix the config here. Not convenient to put an #ifdef _WIN32 in mbedtls_config.h as
  * it would confuse config.py. */
 #if !defined(MBEDTLS_PLATFORM_SNPRINTF_ALT) && \
     !defined(MBEDTLS_PLATFORM_SNPRINTF_MACRO)
@@ -55,9 +50,8 @@
 #endif
 #endif /* _WIN32 */
 
-#if defined(TARGET_LIKE_MBED) && \
-    ( defined(MBEDTLS_NET_C) || defined(MBEDTLS_TIMING_C) )
-#error "The NET and TIMING modules are not available for mbed OS - please use the network and timing functions provided by mbed OS"
+#if defined(TARGET_LIKE_MBED) && defined(MBEDTLS_NET_C)
+#error "The NET module is not available for mbed OS - please use the network functions provided by Mbed OS"
 #endif
 
 #if defined(MBEDTLS_DEPRECATED_WARNING) && \
@@ -130,16 +124,6 @@
 #error "MBEDTLS_ECP_RESTARTABLE defined, but it cannot coexist with an alternative or PSA-based ECP implementation"
 #endif
 
-#if defined(MBEDTLS_ECP_RESTARTABLE)           && \
-    ! defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
-#error "MBEDTLS_ECP_RESTARTABLE defined, but not MBEDTLS_ECDH_LEGACY_CONTEXT"
-#endif
-
-#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)           && \
-    defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
-#error "MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED defined, but MBEDTLS_ECDH_LEGACY_CONTEXT not disabled"
-#endif
-
 #if defined(MBEDTLS_ECDSA_DETERMINISTIC) && !defined(MBEDTLS_HMAC_DRBG_C)
 #error "MBEDTLS_ECDSA_DETERMINISTIC defined, but not all prerequisites"
 #endif
@@ -161,14 +145,6 @@
 #error "MBEDTLS_ECP_C defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_ECP_C) && !(            \
-    defined(MBEDTLS_ECP_ALT) ||             \
-    defined(MBEDTLS_CTR_DRBG_C) ||          \
-    defined(MBEDTLS_HMAC_DRBG_C) ||         \
-    defined(MBEDTLS_ECP_NO_INTERNAL_RNG))
-#error "MBEDTLS_ECP_C requires a DRBG module unless MBEDTLS_ECP_NO_INTERNAL_RNG is defined or an alternative implementation is used"
-#endif
-
 #if defined(MBEDTLS_PK_PARSE_C) && !defined(MBEDTLS_ASN1_PARSE_C)
 #error "MBEDTLS_PK_PARSE_C defined, but not all prerequesites"
 #endif
@@ -480,10 +456,6 @@
 #error "MBEDTLS_PLATFORM_STD_CALLOC defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PLATFORM_STD_CALLOC) && !defined(MBEDTLS_PLATFORM_MEMORY)
-#error "MBEDTLS_PLATFORM_STD_CALLOC defined, but not all prerequisites"
-#endif
-
 #if defined(MBEDTLS_PLATFORM_STD_FREE) && !defined(MBEDTLS_PLATFORM_MEMORY)
 #error "MBEDTLS_PLATFORM_STD_FREE defined, but not all prerequisites"
 #endif
@@ -828,12 +800,20 @@
 #error "MBEDTLS_ZLIB_SUPPORT was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4031"
 #endif
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1) //no-check-names
-#error "MBEDTLS_SSL_PROTO_TLS1 (TLS v1.0 support) was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4286"
+#if defined(MBEDTLS_CHECK_PARAMS) //no-check-names
+#error "MBEDTLS_CHECK_PARAMS was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4313"
 #endif
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_1) //no-check-names
-#error "MBEDTLS_SSL_PROTO_TLS1_1 (TLS v1.1 support) was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4286"
+#if defined(MBEDTLS_SSL_CID_PADDING_GRANULARITY) //no-check-names
+#error "MBEDTLS_SSL_CID_PADDING_GRANULARITY was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4335"
+#endif
+
+#if defined(MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY) //no-check-names
+#error "MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4335"
+#endif
+
+#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) //no-check-names
+#error "MBEDTLS_SSL_TRUNCATED_HMAC was removed in Mbed TLS 3.0. See https://github.com/ARMmbed/mbedtls/issues/4341"
 #endif
 
 /*
diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index 06a29e7..9c9a2e8 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -26,12 +26,9 @@
 
 #ifndef MBEDTLS_CIPHER_H
 #define MBEDTLS_CIPHER_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include "mbedtls/platform_util.h"
@@ -44,7 +41,7 @@
 #define MBEDTLS_CIPHER_MODE_WITH_PADDING
 #endif
 
-#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER) || \
+#if defined(MBEDTLS_CIPHER_NULL_CIPHER) || \
     defined(MBEDTLS_CHACHA20_C)
 #define MBEDTLS_CIPHER_MODE_STREAM
 #endif
@@ -54,13 +51,20 @@
 #define inline __inline
 #endif
 
-#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE  -0x6080  /**< The selected feature is not available. */
-#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA       -0x6100  /**< Bad input parameters. */
-#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED         -0x6180  /**< Failed to allocate memory. */
-#define MBEDTLS_ERR_CIPHER_INVALID_PADDING      -0x6200  /**< Input data contains invalid padding and is rejected. */
-#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED  -0x6280  /**< Decryption of block requires a full block. */
-#define MBEDTLS_ERR_CIPHER_AUTH_FAILED          -0x6300  /**< Authentication failed (for AEAD modes). */
-#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT      -0x6380  /**< The context is invalid. For example, because it was freed. */
+/** The selected feature is not available. */
+#define MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE  -0x6080
+/** Bad input parameters. */
+#define MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA       -0x6100
+/** Failed to allocate memory. */
+#define MBEDTLS_ERR_CIPHER_ALLOC_FAILED         -0x6180
+/** Input data contains invalid padding and is rejected. */
+#define MBEDTLS_ERR_CIPHER_INVALID_PADDING      -0x6200
+/** Decryption of block requires a full block. */
+#define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED  -0x6280
+/** Authentication failed (for AEAD modes). */
+#define MBEDTLS_ERR_CIPHER_AUTH_FAILED          -0x6300
+/** The context is invalid. For example, because it was freed. */
+#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT      -0x6380
 
 #define MBEDTLS_CIPHER_VARIABLE_IV_LEN     0x01    /**< Cipher accepts IVs of variable length. */
 #define MBEDTLS_CIPHER_VARIABLE_KEY_LEN    0x02    /**< Cipher accepts keys of variable length. */
@@ -72,7 +76,7 @@
 /**
  * \brief     Supported cipher types.
  *
- * \warning   RC4 and DES are considered weak ciphers and their use
+ * \warning   DES is considered weak cipher and its use
  *            constitutes a security risk. Arm recommends considering stronger
  *            ciphers instead.
  */
@@ -83,8 +87,6 @@
     MBEDTLS_CIPHER_ID_DES,       /**< The DES cipher. */
     MBEDTLS_CIPHER_ID_3DES,      /**< The Triple DES cipher. */
     MBEDTLS_CIPHER_ID_CAMELLIA,  /**< The Camellia cipher. */
-    MBEDTLS_CIPHER_ID_BLOWFISH,  /**< The Blowfish cipher. */
-    MBEDTLS_CIPHER_ID_ARC4,      /**< The RC4 cipher. */
     MBEDTLS_CIPHER_ID_ARIA,      /**< The Aria cipher. */
     MBEDTLS_CIPHER_ID_CHACHA20,  /**< The ChaCha20 cipher. */
 } mbedtls_cipher_id_t;
@@ -92,7 +94,7 @@
 /**
  * \brief     Supported {cipher type, cipher mode} pairs.
  *
- * \warning   RC4 and DES are considered weak ciphers and their use
+ * \warning   DES is considered weak cipher and its use
  *            constitutes a security risk. Arm recommends considering stronger
  *            ciphers instead.
  */
@@ -135,11 +137,6 @@
     MBEDTLS_CIPHER_DES_EDE_CBC,          /**< DES cipher with EDE CBC mode. */
     MBEDTLS_CIPHER_DES_EDE3_ECB,         /**< DES cipher with EDE3 ECB mode. */
     MBEDTLS_CIPHER_DES_EDE3_CBC,         /**< DES cipher with EDE3 CBC mode. */
-    MBEDTLS_CIPHER_BLOWFISH_ECB,         /**< Blowfish cipher with ECB mode. */
-    MBEDTLS_CIPHER_BLOWFISH_CBC,         /**< Blowfish cipher with CBC mode. */
-    MBEDTLS_CIPHER_BLOWFISH_CFB64,       /**< Blowfish cipher with CFB64 mode. */
-    MBEDTLS_CIPHER_BLOWFISH_CTR,         /**< Blowfish cipher with CTR mode. */
-    MBEDTLS_CIPHER_ARC4_128,             /**< RC4 cipher with 128-bit mode. */
     MBEDTLS_CIPHER_AES_128_CCM,          /**< AES cipher with 128-bit CCM mode. */
     MBEDTLS_CIPHER_AES_192_CCM,          /**< AES cipher with 192-bit CCM mode. */
     MBEDTLS_CIPHER_AES_256_CCM,          /**< AES cipher with 256-bit CCM mode. */
@@ -267,37 +264,37 @@
     /** Full cipher identifier. For example,
      * MBEDTLS_CIPHER_AES_256_CBC.
      */
-    mbedtls_cipher_type_t type;
+    mbedtls_cipher_type_t MBEDTLS_PRIVATE(type);
 
     /** The cipher mode. For example, MBEDTLS_MODE_CBC. */
-    mbedtls_cipher_mode_t mode;
+    mbedtls_cipher_mode_t MBEDTLS_PRIVATE(mode);
 
     /** The cipher key length, in bits. This is the
      * default length for variable sized ciphers.
      * Includes parity bits for ciphers like DES.
      */
-    unsigned int key_bitlen;
+    unsigned int MBEDTLS_PRIVATE(key_bitlen);
 
     /** Name of the cipher. */
-    const char * name;
+    const char * MBEDTLS_PRIVATE(name);
 
     /** IV or nonce size, in Bytes.
      * For ciphers that accept variable IV sizes,
      * this is the recommended size.
      */
-    unsigned int iv_size;
+    unsigned int MBEDTLS_PRIVATE(iv_size);
 
     /** Bitflag comprised of MBEDTLS_CIPHER_VARIABLE_IV_LEN and
      *  MBEDTLS_CIPHER_VARIABLE_KEY_LEN indicating whether the
      *  cipher supports variable IV or variable key sizes, respectively.
      */
-    int flags;
+    int MBEDTLS_PRIVATE(flags);
 
     /** The block size, in Bytes. */
-    unsigned int block_size;
+    unsigned int MBEDTLS_PRIVATE(block_size);
 
     /** Struct for base cipher information and functions. */
-    const mbedtls_cipher_base_t *base;
+    const mbedtls_cipher_base_t *MBEDTLS_PRIVATE(base);
 
 } mbedtls_cipher_info_t;
 
@@ -307,43 +304,43 @@
 typedef struct mbedtls_cipher_context_t
 {
     /** Information about the associated cipher. */
-    const mbedtls_cipher_info_t *cipher_info;
+    const mbedtls_cipher_info_t *MBEDTLS_PRIVATE(cipher_info);
 
     /** Key length to use. */
-    int key_bitlen;
+    int MBEDTLS_PRIVATE(key_bitlen);
 
     /** Operation that the key of the context has been
      * initialized for.
      */
-    mbedtls_operation_t operation;
+    mbedtls_operation_t MBEDTLS_PRIVATE(operation);
 
 #if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
     /** Padding functions to use, if relevant for
      * the specific cipher mode.
      */
-    void (*add_padding)( unsigned char *output, size_t olen, size_t data_len );
-    int (*get_padding)( unsigned char *input, size_t ilen, size_t *data_len );
+    void (*MBEDTLS_PRIVATE(add_padding))( unsigned char *output, size_t olen, size_t data_len );
+    int (*MBEDTLS_PRIVATE(get_padding))( unsigned char *input, size_t ilen, size_t *data_len );
 #endif
 
     /** Buffer for input that has not been processed yet. */
-    unsigned char unprocessed_data[MBEDTLS_MAX_BLOCK_LENGTH];
+    unsigned char MBEDTLS_PRIVATE(unprocessed_data)[MBEDTLS_MAX_BLOCK_LENGTH];
 
     /** Number of Bytes that have not been processed yet. */
-    size_t unprocessed_len;
+    size_t MBEDTLS_PRIVATE(unprocessed_len);
 
     /** Current IV or NONCE_COUNTER for CTR-mode, data unit (or sector) number
      * for XTS-mode. */
-    unsigned char iv[MBEDTLS_MAX_IV_LENGTH];
+    unsigned char MBEDTLS_PRIVATE(iv)[MBEDTLS_MAX_IV_LENGTH];
 
     /** IV size in Bytes, for ciphers with variable-length IVs. */
-    size_t iv_size;
+    size_t MBEDTLS_PRIVATE(iv_size);
 
     /** The cipher-specific context. */
-    void *cipher_ctx;
+    void *MBEDTLS_PRIVATE(cipher_ctx);
 
 #if defined(MBEDTLS_CMAC_C)
     /** CMAC-specific context. */
-    mbedtls_cmac_context_t *cmac_ctx;
+    mbedtls_cmac_context_t *MBEDTLS_PRIVATE(cmac_ctx);
 #endif
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
@@ -354,7 +351,7 @@
      *  mbedtls_cipher_setup(), and set if it was established through
      *  mbedtls_cipher_setup_psa().
      */
-    unsigned char psa_enabled;
+    unsigned char MBEDTLS_PRIVATE(psa_enabled);
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 } mbedtls_cipher_context_t;
@@ -504,10 +501,10 @@
     const mbedtls_cipher_context_t *ctx )
 {
     MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, 0 );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return 0;
 
-    return ctx->cipher_info->block_size;
+    return ctx->MBEDTLS_PRIVATE(cipher_info)->MBEDTLS_PRIVATE(block_size);
 }
 
 /**
@@ -523,10 +520,10 @@
     const mbedtls_cipher_context_t *ctx )
 {
     MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, MBEDTLS_MODE_NONE );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return MBEDTLS_MODE_NONE;
 
-    return ctx->cipher_info->mode;
+    return ctx->MBEDTLS_PRIVATE(cipher_info)->MBEDTLS_PRIVATE(mode);
 }
 
 /**
@@ -543,13 +540,13 @@
     const mbedtls_cipher_context_t *ctx )
 {
     MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, 0 );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return 0;
 
-    if( ctx->iv_size != 0 )
-        return (int) ctx->iv_size;
+    if( ctx->MBEDTLS_PRIVATE(iv_size) != 0 )
+        return (int) ctx->MBEDTLS_PRIVATE(iv_size);
 
-    return (int) ctx->cipher_info->iv_size;
+    return (int) ctx->MBEDTLS_PRIVATE(cipher_info)->MBEDTLS_PRIVATE(iv_size);
 }
 
 /**
@@ -565,10 +562,10 @@
 {
     MBEDTLS_INTERNAL_VALIDATE_RET(
         ctx != NULL, MBEDTLS_CIPHER_NONE );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return MBEDTLS_CIPHER_NONE;
 
-    return ctx->cipher_info->type;
+    return ctx->MBEDTLS_PRIVATE(cipher_info)->MBEDTLS_PRIVATE(type);
 }
 
 /**
@@ -584,10 +581,10 @@
     const mbedtls_cipher_context_t *ctx )
 {
     MBEDTLS_INTERNAL_VALIDATE_RET( ctx != NULL, 0 );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return 0;
 
-    return ctx->cipher_info->name;
+    return ctx->MBEDTLS_PRIVATE(cipher_info)->MBEDTLS_PRIVATE(name);
 }
 
 /**
@@ -604,10 +601,10 @@
 {
     MBEDTLS_INTERNAL_VALIDATE_RET(
         ctx != NULL, MBEDTLS_KEY_LENGTH_NONE );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return MBEDTLS_KEY_LENGTH_NONE;
 
-    return (int) ctx->cipher_info->key_bitlen;
+    return (int) ctx->MBEDTLS_PRIVATE(cipher_info)->MBEDTLS_PRIVATE(key_bitlen);
 }
 
 /**
@@ -623,10 +620,10 @@
 {
     MBEDTLS_INTERNAL_VALIDATE_RET(
         ctx != NULL, MBEDTLS_OPERATION_NONE );
-    if( ctx->cipher_info == NULL )
+    if( ctx->MBEDTLS_PRIVATE(cipher_info) == NULL )
         return MBEDTLS_OPERATION_NONE;
 
-    return ctx->operation;
+    return ctx->MBEDTLS_PRIVATE(operation);
 }
 
 /**
@@ -731,8 +728,6 @@
 /**
  * \brief               This function adds additional data for AEAD ciphers.
  *                      Currently supported with GCM and ChaCha20+Poly1305.
- *                      This must be called exactly once, after
- *                      mbedtls_cipher_reset().
  *
  * \param ctx           The generic cipher context. This must be initialized.
  * \param ad            The additional data to use. This must be a readable
diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h
index a0563b1..3e599b9 100644
--- a/include/mbedtls/cmac.h
+++ b/include/mbedtls/cmac.h
@@ -25,12 +25,9 @@
 
 #ifndef MBEDTLS_CMAC_H
 #define MBEDTLS_CMAC_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/cipher.h"
 
@@ -55,14 +52,14 @@
 struct mbedtls_cmac_context_t
 {
     /** The internal state of the CMAC algorithm.  */
-    unsigned char       state[MBEDTLS_CIPHER_BLKSIZE_MAX];
+    unsigned char       MBEDTLS_PRIVATE(state)[MBEDTLS_CIPHER_BLKSIZE_MAX];
 
     /** Unprocessed data - either data that was not block aligned and is still
      *  pending processing, or the final block. */
-    unsigned char       unprocessed_block[MBEDTLS_CIPHER_BLKSIZE_MAX];
+    unsigned char       MBEDTLS_PRIVATE(unprocessed_block)[MBEDTLS_CIPHER_BLKSIZE_MAX];
 
     /** The length of data pending processing. */
-    size_t              unprocessed_len;
+    size_t              MBEDTLS_PRIVATE(unprocessed_len);
 };
 
 #else  /* !MBEDTLS_CMAC_ALT */
diff --git a/include/mbedtls/compat-2.x.h b/include/mbedtls/compat-2.x.h
new file mode 100644
index 0000000..cdf81dc
--- /dev/null
+++ b/include/mbedtls/compat-2.x.h
@@ -0,0 +1,58 @@
+/**
+ * \file compat-2.x.h
+ *
+ * \brief Compatibility definitions
+ *
+ * \deprecated Use the new names directly instead
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#warning "Including compat-2.x.h is deprecated"
+#endif
+
+#ifndef MBEDTLS_COMPAT2X_H
+#define MBEDTLS_COMPAT2X_H
+
+/*
+ * Macros for renamed functions
+ */
+#define mbedtls_ctr_drbg_update_ret   mbedtls_ctr_drbg_update
+#define mbedtls_hmac_drbg_update_ret  mbedtls_hmac_drbg_update
+#define mbedtls_md5_starts_ret        mbedtls_md5_starts
+#define mbedtls_md5_update_ret        mbedtls_md5_update
+#define mbedtls_md5_finish_ret        mbedtls_md5_finish
+#define mbedtls_md5_ret               mbedtls_md5
+#define mbedtls_ripemd160_starts_ret  mbedtls_ripemd160_starts
+#define mbedtls_ripemd160_update_ret  mbedtls_ripemd160_update
+#define mbedtls_ripemd160_finish_ret  mbedtls_ripemd160_finish
+#define mbedtls_ripemd160_ret         mbedtls_ripemd160
+#define mbedtls_sha1_starts_ret       mbedtls_sha1_starts
+#define mbedtls_sha1_update_ret       mbedtls_sha1_update
+#define mbedtls_sha1_finish_ret       mbedtls_sha1_finish
+#define mbedtls_sha1_ret              mbedtls_sha1
+#define mbedtls_sha256_starts_ret     mbedtls_sha256_starts
+#define mbedtls_sha256_update_ret     mbedtls_sha256_update
+#define mbedtls_sha256_finish_ret     mbedtls_sha256_finish
+#define mbedtls_sha256_ret            mbedtls_sha256
+#define mbedtls_sha512_starts_ret     mbedtls_sha512_starts
+#define mbedtls_sha512_update_ret     mbedtls_sha512_update
+#define mbedtls_sha512_finish_ret     mbedtls_sha512_finish
+#define mbedtls_sha512_ret            mbedtls_sha512
+
+#endif /* MBEDTLS_COMPAT2X_H */
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index f5db94e..9080cd1 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -3,11 +3,11 @@
  * \brief PSA crypto configuration options (set of defines)
  *
  *  This set of compile-time options takes settings defined in
- *  include/mbedtls/config.h and include/psa/crypto_config.h and uses
+ *  include/mbedtls/mbedtls_config.h and include/psa/crypto_config.h and uses
  *  those definitions to define symbols used in the library code.
  *
  *  Users and integrators should not edit this file, please edit
- *  include/mbedtls/config.h for MBETLS_XXX settings or
+ *  include/mbedtls/mbedtls_config.h for MBETLS_XXX settings or
  *  include/psa/crypto_config.h for PSA_WANT_XXX settings.
  */
 /*
@@ -103,16 +103,6 @@
 #endif /* !MBEDTLS_PSA_ACCEL_ALG_HMAC */
 #endif /* PSA_WANT_ALG_HMAC */
 
-#if defined(PSA_WANT_ALG_MD2) && !defined(MBEDTLS_PSA_ACCEL_ALG_MD2)
-#define MBEDTLS_PSA_BUILTIN_ALG_MD2 1
-#define MBEDTLS_MD2_C
-#endif
-
-#if defined(PSA_WANT_ALG_MD4) && !defined(MBEDTLS_PSA_ACCEL_ALG_MD4)
-#define MBEDTLS_PSA_BUILTIN_ALG_MD4 1
-#define MBEDTLS_MD4_C
-#endif
-
 #if defined(PSA_WANT_ALG_MD5) && !defined(MBEDTLS_PSA_ACCEL_ALG_MD5)
 #define MBEDTLS_PSA_BUILTIN_ALG_MD5 1
 #define MBEDTLS_MD5_C
@@ -277,13 +267,6 @@
 #endif /* PSA_HAVE_SOFT_KEY_TYPE_AES || PSA_HAVE_SOFT_BLOCK_MODE */
 #endif /* PSA_WANT_KEY_TYPE_AES */
 
-#if defined(PSA_WANT_KEY_TYPE_ARC4)
-#if !defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_ARC4)
-#define MBEDTLS_PSA_BUILTIN_KEY_TYPE_ARC4 1
-#define MBEDTLS_ARC4_C
-#endif /*!MBEDTLS_PSA_ACCEL_KEY_TYPE_ARC4 */
-#endif /* PSA_WANT_KEY_TYPE_ARC4 */
-
 #if defined(PSA_WANT_KEY_TYPE_CAMELLIA)
 #if !defined(MBEDTLS_PSA_ACCEL_KEY_TYPE_CAMELLIA)
 #define PSA_HAVE_SOFT_KEY_TYPE_CAMELLIA 1
@@ -450,11 +433,6 @@
 
 #if defined(PSA_WANT_ECC_MONTGOMERY_448)
 #if !defined(MBEDTLS_PSA_ACCEL_ECC_MONTGOMERY_448)
-/*
- * Curve448 is not yet supported via the PSA API in Mbed TLS
- * (https://github.com/ARMmbed/mbedtls/issues/4249).
- */
-#error "Curve448 is not yet supported via the PSA API in Mbed TLS."
 #define MBEDTLS_ECP_DP_CURVE448_ENABLED
 #define MBEDTLS_PSA_BUILTIN_ECC_MONTGOMERY_448 1
 #endif /* !MBEDTLS_PSA_ACCEL_ECC_MONTGOMERY_448 */
@@ -591,16 +569,6 @@
 #define PSA_WANT_ALG_TLS12_PSK_TO_MS 1
 #endif /* MBEDTLS_MD_C */
 
-#if defined(MBEDTLS_MD2_C)
-#define MBEDTLS_PSA_BUILTIN_ALG_MD2 1
-#define PSA_WANT_ALG_MD2 1
-#endif
-
-#if defined(MBEDTLS_MD4_C)
-#define MBEDTLS_PSA_BUILTIN_ALG_MD4 1
-#define PSA_WANT_ALG_MD4 1
-#endif
-
 #if defined(MBEDTLS_MD5_C)
 #define MBEDTLS_PSA_BUILTIN_ALG_MD5 1
 #define PSA_WANT_ALG_MD5 1
@@ -661,13 +629,6 @@
 #define MBEDTLS_PSA_BUILTIN_KEY_TYPE_AES 1
 #endif
 
-#if defined(MBEDTLS_ARC4_C)
-#define PSA_WANT_KEY_TYPE_ARC4 1
-#define PSA_WANT_ALG_STREAM_CIPHER 1
-#define MBEDTLS_PSA_BUILTIN_KEY_TYPE_ARC4 1
-#define MBEDTLS_PSA_BUILTIN_ALG_STREAM_CIPHER 1
-#endif
-
 #if defined(MBEDTLS_CAMELLIA_C)
 #define PSA_WANT_KEY_TYPE_CAMELLIA 1
 #define MBEDTLS_PSA_BUILTIN_KEY_TYPE_CAMELLIA 1
@@ -744,8 +705,7 @@
 #define PSA_WANT_ECC_MONTGOMERY_255
 #endif
 
-/* Curve448 is not yet supported via the PSA API (https://github.com/ARMmbed/mbedtls/issues/4249) */
-#if 0 && defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
+#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
 #define MBEDTLS_PSA_BUILTIN_ECC_MONTGOMERY_448 1
 #define PSA_WANT_ECC_MONTGOMERY_448
 #endif
diff --git a/include/mbedtls/ctr_drbg.h b/include/mbedtls/ctr_drbg.h
index 0f2c551..959a5d5 100644
--- a/include/mbedtls/ctr_drbg.h
+++ b/include/mbedtls/ctr_drbg.h
@@ -16,7 +16,7 @@
  * The security strength as defined in NIST SP 800-90A is
  * 128 bits when AES-128 is used (\c MBEDTLS_CTR_DRBG_USE_128_BIT_KEY enabled)
  * and 256 bits otherwise, provided that #MBEDTLS_CTR_DRBG_ENTROPY_LEN is
- * kept at its default value (and not overridden in config.h) and that the
+ * kept at its default value (and not overridden in mbedtls_config.h) and that the
  * DRBG instance is set up with default parameters.
  * See the documentation of mbedtls_ctr_drbg_seed() for more
  * information.
@@ -40,12 +40,9 @@
 
 #ifndef MBEDTLS_CTR_DRBG_H
 #define MBEDTLS_CTR_DRBG_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/aes.h"
 
@@ -53,10 +50,14 @@
 #include "mbedtls/threading.h"
 #endif
 
-#define MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED        -0x0034  /**< The entropy source failed. */
-#define MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG              -0x0036  /**< The requested random buffer length is too big. */
-#define MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG                -0x0038  /**< The input (entropy + additional data) is too large. */
-#define MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR                -0x003A  /**< Read or write error in file. */
+/** The entropy source failed. */
+#define MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED        -0x0034
+/** The requested random buffer length is too big. */
+#define MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG              -0x0036
+/** The input (entropy + additional data) is too large. */
+#define MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG                -0x0038
+/** Read or write error in file. */
+#define MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR                -0x003A
 
 #define MBEDTLS_CTR_DRBG_BLOCKSIZE          16 /**< The block size used by the cipher. */
 
@@ -83,7 +84,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them using the compiler command
+ * Either change them in mbedtls_config.h or define them using the compiler command
  * line.
  * \{
  */
@@ -168,8 +169,8 @@
  */
 typedef struct mbedtls_ctr_drbg_context
 {
-    unsigned char counter[16];  /*!< The counter (V). */
-    int reseed_counter;         /*!< The reseed counter.
+    unsigned char MBEDTLS_PRIVATE(counter)[16];  /*!< The counter (V). */
+    int MBEDTLS_PRIVATE(reseed_counter);         /*!< The reseed counter.
                                  * This is the number of requests that have
                                  * been made since the last (re)seeding,
                                  * minus one.
@@ -179,25 +180,25 @@
                                  * or -1 if no nonce length has been explicitly
                                  * set (see mbedtls_ctr_drbg_set_nonce_len()).
                                  */
-    int prediction_resistance;  /*!< This determines whether prediction
+    int MBEDTLS_PRIVATE(prediction_resistance);  /*!< This determines whether prediction
                                      resistance is enabled, that is
                                      whether to systematically reseed before
                                      each random generation. */
-    size_t entropy_len;         /*!< The amount of entropy grabbed on each
+    size_t MBEDTLS_PRIVATE(entropy_len);         /*!< The amount of entropy grabbed on each
                                      seed or reseed operation, in bytes. */
-    int reseed_interval;        /*!< The reseed interval.
+    int MBEDTLS_PRIVATE(reseed_interval);        /*!< The reseed interval.
                                  * This is the maximum number of requests
                                  * that can be made between reseedings. */
 
-    mbedtls_aes_context aes_ctx;        /*!< The AES context. */
+    mbedtls_aes_context MBEDTLS_PRIVATE(aes_ctx);        /*!< The AES context. */
 
     /*
      * Callbacks (Entropy)
      */
-    int (*f_entropy)(void *, unsigned char *, size_t);
+    int (*MBEDTLS_PRIVATE(f_entropy))(void *, unsigned char *, size_t);
                                 /*!< The entropy callback function. */
 
-    void *p_entropy;            /*!< The context for the entropy function. */
+    void *MBEDTLS_PRIVATE(p_entropy);            /*!< The context for the entropy function. */
 
 #if defined(MBEDTLS_THREADING_C)
     /* Invariant: the mutex is initialized if and only if f_entropy != NULL.
@@ -207,7 +208,7 @@
      * Note that this invariant may change without notice. Do not rely on it
      * and do not access the mutex directly in application code.
      */
-    mbedtls_threading_mutex_t mutex;
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);
 #endif
 }
 mbedtls_ctr_drbg_context;
@@ -462,9 +463,9 @@
  *                     #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT.
  * \return             An error from the underlying AES cipher on failure.
  */
-int mbedtls_ctr_drbg_update_ret( mbedtls_ctr_drbg_context *ctx,
-                                 const unsigned char *additional,
-                                 size_t add_len );
+int mbedtls_ctr_drbg_update( mbedtls_ctr_drbg_context *ctx,
+                             const unsigned char *additional,
+                             size_t add_len );
 
 /**
  * \brief   This function updates a CTR_DRBG instance with additional
diff --git a/include/mbedtls/debug.h b/include/mbedtls/debug.h
index 71b0829..0aed596 100644
--- a/include/mbedtls/debug.h
+++ b/include/mbedtls/debug.h
@@ -22,11 +22,7 @@
 #ifndef MBEDTLS_DEBUG_H
 #define MBEDTLS_DEBUG_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ssl.h"
 
diff --git a/include/mbedtls/des.h b/include/mbedtls/des.h
index 92da73f..63a8e00 100644
--- a/include/mbedtls/des.h
+++ b/include/mbedtls/des.h
@@ -26,12 +26,9 @@
  */
 #ifndef MBEDTLS_DES_H
 #define MBEDTLS_DES_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -39,7 +36,8 @@
 #define MBEDTLS_DES_ENCRYPT     1
 #define MBEDTLS_DES_DECRYPT     0
 
-#define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH              -0x0032  /**< The data input has an invalid length. */
+/** The data input has an invalid length. */
+#define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH              -0x0032
 
 #define MBEDTLS_DES_KEY_SIZE    8
 
@@ -60,7 +58,7 @@
  */
 typedef struct mbedtls_des_context
 {
-    uint32_t sk[32];            /*!<  DES subkeys       */
+    uint32_t MBEDTLS_PRIVATE(sk)[32];            /*!<  DES subkeys       */
 }
 mbedtls_des_context;
 
@@ -69,7 +67,7 @@
  */
 typedef struct mbedtls_des3_context
 {
-    uint32_t sk[96];            /*!<  3DES subkeys      */
+    uint32_t MBEDTLS_PRIVATE(sk)[96];            /*!<  3DES subkeys      */
 }
 mbedtls_des3_context;
 
diff --git a/include/mbedtls/dhm.h b/include/mbedtls/dhm.h
index 0e8892e..32a957d 100644
--- a/include/mbedtls/dhm.h
+++ b/include/mbedtls/dhm.h
@@ -62,27 +62,45 @@
 
 #ifndef MBEDTLS_DHM_H
 #define MBEDTLS_DHM_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 #include "mbedtls/bignum.h"
 
 /*
  * DHM Error codes
  */
-#define MBEDTLS_ERR_DHM_BAD_INPUT_DATA                    -0x3080  /**< Bad input parameters. */
-#define MBEDTLS_ERR_DHM_READ_PARAMS_FAILED                -0x3100  /**< Reading of the DHM parameters failed. */
-#define MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED                -0x3180  /**< Making of the DHM parameters failed. */
-#define MBEDTLS_ERR_DHM_READ_PUBLIC_FAILED                -0x3200  /**< Reading of the public values failed. */
-#define MBEDTLS_ERR_DHM_MAKE_PUBLIC_FAILED                -0x3280  /**< Making of the public value failed. */
-#define MBEDTLS_ERR_DHM_CALC_SECRET_FAILED                -0x3300  /**< Calculation of the DHM secret failed. */
-#define MBEDTLS_ERR_DHM_INVALID_FORMAT                    -0x3380  /**< The ASN.1 data is not formatted correctly. */
-#define MBEDTLS_ERR_DHM_ALLOC_FAILED                      -0x3400  /**< Allocation of memory failed. */
-#define MBEDTLS_ERR_DHM_FILE_IO_ERROR                     -0x3480  /**< Read or write of file failed. */
-#define MBEDTLS_ERR_DHM_SET_GROUP_FAILED                  -0x3580  /**< Setting the modulus and generator failed. */
+/** Bad input parameters. */
+#define MBEDTLS_ERR_DHM_BAD_INPUT_DATA                    -0x3080
+/** Reading of the DHM parameters failed. */
+#define MBEDTLS_ERR_DHM_READ_PARAMS_FAILED                -0x3100
+/** Making of the DHM parameters failed. */
+#define MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED                -0x3180
+/** Reading of the public values failed. */
+#define MBEDTLS_ERR_DHM_READ_PUBLIC_FAILED                -0x3200
+/** Making of the public value failed. */
+#define MBEDTLS_ERR_DHM_MAKE_PUBLIC_FAILED                -0x3280
+/** Calculation of the DHM secret failed. */
+#define MBEDTLS_ERR_DHM_CALC_SECRET_FAILED                -0x3300
+/** The ASN.1 data is not formatted correctly. */
+#define MBEDTLS_ERR_DHM_INVALID_FORMAT                    -0x3380
+/** Allocation of memory failed. */
+#define MBEDTLS_ERR_DHM_ALLOC_FAILED                      -0x3400
+/** Read or write of file failed. */
+#define MBEDTLS_ERR_DHM_FILE_IO_ERROR                     -0x3480
+/** Setting the modulus and generator failed. */
+#define MBEDTLS_ERR_DHM_SET_GROUP_FAILED                  -0x3580
+
+/** Which parameter to access in mbedtls_dhm_get_value(). */
+typedef enum
+{
+    MBEDTLS_DHM_PARAM_P,  /*!<  The prime modulus. */
+    MBEDTLS_DHM_PARAM_G,  /*!<  The generator. */
+    MBEDTLS_DHM_PARAM_X,  /*!<  Our secret value. */
+    MBEDTLS_DHM_PARAM_GX, /*!<  Our public key = \c G^X mod \c P. */
+    MBEDTLS_DHM_PARAM_GY, /*!<  The public key of the peer = \c G^Y mod \c P. */
+    MBEDTLS_DHM_PARAM_K,  /*!<  The shared secret = \c G^(XY) mod \c P. */
+} mbedtls_dhm_parameter;
 
 #ifdef __cplusplus
 extern "C" {
@@ -95,17 +113,16 @@
  */
 typedef struct mbedtls_dhm_context
 {
-    size_t len;         /*!<  The size of \p P in Bytes. */
-    mbedtls_mpi P;      /*!<  The prime modulus. */
-    mbedtls_mpi G;      /*!<  The generator. */
-    mbedtls_mpi X;      /*!<  Our secret value. */
-    mbedtls_mpi GX;     /*!<  Our public key = \c G^X mod \c P. */
-    mbedtls_mpi GY;     /*!<  The public key of the peer = \c G^Y mod \c P. */
-    mbedtls_mpi K;      /*!<  The shared secret = \c G^(XY) mod \c P. */
-    mbedtls_mpi RP;     /*!<  The cached value = \c R^2 mod \c P. */
-    mbedtls_mpi Vi;     /*!<  The blinding value. */
-    mbedtls_mpi Vf;     /*!<  The unblinding value. */
-    mbedtls_mpi pX;     /*!<  The previous \c X. */
+    mbedtls_mpi MBEDTLS_PRIVATE(P);      /*!<  The prime modulus. */
+    mbedtls_mpi MBEDTLS_PRIVATE(G);      /*!<  The generator. */
+    mbedtls_mpi MBEDTLS_PRIVATE(X);      /*!<  Our secret value. */
+    mbedtls_mpi MBEDTLS_PRIVATE(GX);     /*!<  Our public key = \c G^X mod \c P. */
+    mbedtls_mpi MBEDTLS_PRIVATE(GY);     /*!<  The public key of the peer = \c G^Y mod \c P. */
+    mbedtls_mpi MBEDTLS_PRIVATE(K);      /*!<  The shared secret = \c G^(XY) mod \c P. */
+    mbedtls_mpi MBEDTLS_PRIVATE(RP);     /*!<  The cached value = \c R^2 mod \c P. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Vi);     /*!<  The blinding value. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Vf);     /*!<  The unblinding value. */
+    mbedtls_mpi MBEDTLS_PRIVATE(pX);     /*!<  The previous \c X. */
 }
 mbedtls_dhm_context;
 
@@ -268,10 +285,10 @@
  * \param output_size   The size of the destination buffer. This must be at
  *                      least the size of \c ctx->len (the size of \c P).
  * \param olen          On exit, holds the actual number of Bytes written.
- * \param f_rng         The RNG function, for blinding purposes. This may
- *                      b \c NULL if blinding isn't needed.
- * \param p_rng         The RNG context. This may be \c NULL if \p f_rng
- *                      doesn't need a context argument.
+ * \param f_rng         The RNG function. Must not be \c NULL. Used for
+ *                      blinding.
+ * \param p_rng         The RNG context to be passed to \p f_rng. This may be
+ *                      \c NULL if \p f_rng doesn't need a context parameter.
  *
  * \return              \c 0 on success.
  * \return              An \c MBEDTLS_ERR_DHM_XXX error code on failure.
@@ -282,6 +299,42 @@
                      void *p_rng );
 
 /**
+ * \brief          This function returns the size of the prime modulus in bits.
+ *
+ * \param ctx      The DHM context to query.
+ *
+ * \return         The size of the prime modulus in bits,
+ *                 i.e. the number n such that 2^(n-1) <= P < 2^n.
+ */
+size_t mbedtls_dhm_get_bitlen( const mbedtls_dhm_context *ctx );
+
+/**
+ * \brief          This function returns the size of the prime modulus in bytes.
+ *
+ * \param ctx      The DHM context to query.
+ *
+ * \return         The size of the prime modulus in bytes,
+ *                 i.e. the number n such that 2^(8*(n-1)) <= P < 2^(8*n).
+ */
+size_t mbedtls_dhm_get_len( const mbedtls_dhm_context *ctx );
+
+/**
+ * \brief          This function copies a parameter of a DHM key.
+ *
+ * \param ctx      The DHM context to query.
+ * \param param    The parameter to copy.
+ * \param dest     The MPI object to copy the value into. It must be
+ *                 initialized.
+ *
+ * \return         \c 0 on success.
+ * \return         #MBEDTLS_ERR_DHM_BAD_INPUT_DATA if \p field is invalid.
+ * \return         An \c MBEDTLS_ERR_MPI_XXX error code if the copy fails.
+ */
+int mbedtls_dhm_get_value( const mbedtls_dhm_context *ctx,
+                           mbedtls_dhm_parameter param,
+                           mbedtls_mpi *dest );
+
+/**
  * \brief          This function frees and clears the components
  *                 of a DHM context.
  *
diff --git a/include/mbedtls/ecdh.h b/include/mbedtls/ecdh.h
index 05855cd..7fa7440 100644
--- a/include/mbedtls/ecdh.h
+++ b/include/mbedtls/ecdh.h
@@ -31,15 +31,31 @@
 
 #ifndef MBEDTLS_ECDH_H
 #define MBEDTLS_ECDH_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ecp.h"
 
+/*
+ * Mbed TLS supports two formats for ECDH contexts (#mbedtls_ecdh_context
+ * defined in `ecdh.h`). For most applications, the choice of format makes
+ * no difference, since all library functions can work with either format,
+ * except that the new format is incompatible with MBEDTLS_ECP_RESTARTABLE.
+
+ * The new format used when this option is disabled is smaller
+ * (56 bytes on a 32-bit platform). In future versions of the library, it
+ * will support alternative implementations of ECDH operations.
+ * The new format is incompatible with applications that access
+ * context fields directly and with restartable ECP operations.
+ */
+
+#if defined(MBEDTLS_ECP_RESTARTABLE)
+#define MBEDTLS_ECDH_LEGACY_CONTEXT
+#else
+#undef MBEDTLS_ECDH_LEGACY_CONTEXT
+#endif
+
 #if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
 #undef MBEDTLS_ECDH_LEGACY_CONTEXT
 #include "everest/everest.h"
@@ -83,13 +99,13 @@
  */
 typedef struct mbedtls_ecdh_context_mbed
 {
-    mbedtls_ecp_group grp;   /*!< The elliptic curve used. */
-    mbedtls_mpi d;           /*!< The private key. */
-    mbedtls_ecp_point Q;     /*!< The public key. */
-    mbedtls_ecp_point Qp;    /*!< The value of the public key of the peer. */
-    mbedtls_mpi z;           /*!< The shared secret. */
+    mbedtls_ecp_group MBEDTLS_PRIVATE(grp);   /*!< The elliptic curve used. */
+    mbedtls_mpi MBEDTLS_PRIVATE(d);           /*!< The private key. */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Q);     /*!< The public key. */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Qp);    /*!< The value of the public key of the peer. */
+    mbedtls_mpi MBEDTLS_PRIVATE(z);           /*!< The shared secret. */
 #if defined(MBEDTLS_ECP_RESTARTABLE)
-    mbedtls_ecp_restart_ctx rs; /*!< The restart context for EC computations. */
+    mbedtls_ecp_restart_ctx MBEDTLS_PRIVATE(rs); /*!< The restart context for EC computations. */
 #endif
 } mbedtls_ecdh_context_mbed;
 #endif
@@ -104,35 +120,35 @@
 typedef struct mbedtls_ecdh_context
 {
 #if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
-    mbedtls_ecp_group grp;   /*!< The elliptic curve used. */
-    mbedtls_mpi d;           /*!< The private key. */
-    mbedtls_ecp_point Q;     /*!< The public key. */
-    mbedtls_ecp_point Qp;    /*!< The value of the public key of the peer. */
-    mbedtls_mpi z;           /*!< The shared secret. */
-    int point_format;        /*!< The format of point export in TLS messages. */
-    mbedtls_ecp_point Vi;    /*!< The blinding value. */
-    mbedtls_ecp_point Vf;    /*!< The unblinding value. */
-    mbedtls_mpi _d;          /*!< The previous \p d. */
+    mbedtls_ecp_group MBEDTLS_PRIVATE(grp);   /*!< The elliptic curve used. */
+    mbedtls_mpi MBEDTLS_PRIVATE(d);           /*!< The private key. */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Q);     /*!< The public key. */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Qp);    /*!< The value of the public key of the peer. */
+    mbedtls_mpi MBEDTLS_PRIVATE(z);           /*!< The shared secret. */
+    int MBEDTLS_PRIVATE(point_format);        /*!< The format of point export in TLS messages. */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Vi);    /*!< The blinding value. */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Vf);    /*!< The unblinding value. */
+    mbedtls_mpi MBEDTLS_PRIVATE(_d);          /*!< The previous \p d. */
 #if defined(MBEDTLS_ECP_RESTARTABLE)
-    int restart_enabled;        /*!< The flag for restartable mode. */
-    mbedtls_ecp_restart_ctx rs; /*!< The restart context for EC computations. */
+    int MBEDTLS_PRIVATE(restart_enabled);        /*!< The flag for restartable mode. */
+    mbedtls_ecp_restart_ctx MBEDTLS_PRIVATE(rs); /*!< The restart context for EC computations. */
 #endif /* MBEDTLS_ECP_RESTARTABLE */
 #else
-    uint8_t point_format;       /*!< The format of point export in TLS messages
+    uint8_t MBEDTLS_PRIVATE(point_format);       /*!< The format of point export in TLS messages
                                   as defined in RFC 4492. */
-    mbedtls_ecp_group_id grp_id;/*!< The elliptic curve used. */
-    mbedtls_ecdh_variant var;   /*!< The ECDH implementation/structure used. */
+    mbedtls_ecp_group_id MBEDTLS_PRIVATE(grp_id);/*!< The elliptic curve used. */
+    mbedtls_ecdh_variant MBEDTLS_PRIVATE(var);   /*!< The ECDH implementation/structure used. */
     union
     {
-        mbedtls_ecdh_context_mbed   mbed_ecdh;
+        mbedtls_ecdh_context_mbed   MBEDTLS_PRIVATE(mbed_ecdh);
 #if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
-        mbedtls_ecdh_context_everest everest_ecdh;
+        mbedtls_ecdh_context_everest MBEDTLS_PRIVATE(everest_ecdh);
 #endif
-    } ctx;                      /*!< Implementation-specific context. The
+    } MBEDTLS_PRIVATE(ctx);                      /*!< Implementation-specific context. The
                                   context in use is specified by the \c var
                                   field. */
 #if defined(MBEDTLS_ECP_RESTARTABLE)
-    uint8_t restart_enabled;    /*!< The flag for restartable mode. Functions of
+    uint8_t MBEDTLS_PRIVATE(restart_enabled);    /*!< The flag for restartable mode. Functions of
                                   an alternative implementation not supporting
                                   restartable mode must return
                                   MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED error
@@ -202,10 +218,7 @@
  *                  This must be initialized.
  * \param d         Our secret exponent (private key).
  *                  This must be initialized.
- * \param f_rng     The RNG function. This may be \c NULL if randomization
- *                  of intermediate results during the ECP computations is
- *                  not needed (discouraged). See the documentation of
- *                  mbedtls_ecp_mul() for more.
+ * \param f_rng     The RNG function to use. This must not be \c NULL.
  * \param p_rng     The RNG context to be passed to \p f_rng. This may be
  *                  \c NULL if \p f_rng is \c NULL or doesn't need a
  *                  context argument.
@@ -408,8 +421,7 @@
  * \param buf       The buffer to write the generated shared key to. This
  *                  must be a writable buffer of size \p blen Bytes.
  * \param blen      The length of the destination buffer \p buf in Bytes.
- * \param f_rng     The RNG function, for blinding purposes. This may
- *                  b \c NULL if blinding isn't needed.
+ * \param f_rng     The RNG function to use. This must not be \c NULL.
  * \param p_rng     The RNG context. This may be \c NULL if \p f_rng
  *                  doesn't need a context argument.
  *
diff --git a/include/mbedtls/ecdsa.h b/include/mbedtls/ecdsa.h
index 525de5d..71b73ee 100644
--- a/include/mbedtls/ecdsa.h
+++ b/include/mbedtls/ecdsa.h
@@ -29,12 +29,9 @@
 
 #ifndef MBEDTLS_ECDSA_H
 #define MBEDTLS_ECDSA_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ecp.h"
 #include "mbedtls/md.h"
@@ -107,12 +104,12 @@
  */
 typedef struct
 {
-    mbedtls_ecp_restart_ctx ecp;        /*!<  base context for ECP restart and
+    mbedtls_ecp_restart_ctx MBEDTLS_PRIVATE(ecp);        /*!<  base context for ECP restart and
                                               shared administrative info    */
-    mbedtls_ecdsa_restart_ver_ctx *ver; /*!<  ecdsa_verify() sub-context    */
-    mbedtls_ecdsa_restart_sig_ctx *sig; /*!<  ecdsa_sign() sub-context      */
+    mbedtls_ecdsa_restart_ver_ctx *MBEDTLS_PRIVATE(ver); /*!<  ecdsa_verify() sub-context    */
+    mbedtls_ecdsa_restart_sig_ctx *MBEDTLS_PRIVATE(sig); /*!<  ecdsa_sign() sub-context      */
 #if defined(MBEDTLS_ECDSA_DETERMINISTIC)
-    mbedtls_ecdsa_restart_det_ctx *det; /*!<  ecdsa_sign_det() sub-context  */
+    mbedtls_ecdsa_restart_det_ctx *MBEDTLS_PRIVATE(det); /*!<  ecdsa_sign_det() sub-context  */
 #endif
 } mbedtls_ecdsa_restart_ctx;
 
@@ -293,6 +290,7 @@
  *                  size of the curve used, plus 9. For example, 73 Bytes if
  *                  a 256-bit curve is used. A buffer length of
  *                  #MBEDTLS_ECDSA_MAX_LEN is always safe.
+ * \param sig_size  The size of the \p sig buffer in bytes.
  * \param slen      The address at which to store the actual length of
  *                  the signature written. Must not be \c NULL.
  * \param f_rng     The RNG function. This must not be \c NULL if
@@ -309,7 +307,7 @@
 int mbedtls_ecdsa_write_signature( mbedtls_ecdsa_context *ctx,
                                    mbedtls_md_type_t md_alg,
                            const unsigned char *hash, size_t hlen,
-                           unsigned char *sig, size_t *slen,
+                           unsigned char *sig, size_t sig_size, size_t *slen,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng );
 
@@ -335,6 +333,7 @@
  *                  size of the curve used, plus 9. For example, 73 Bytes if
  *                  a 256-bit curve is used. A buffer length of
  *                  #MBEDTLS_ECDSA_MAX_LEN is always safe.
+ * \param sig_size  The size of the \p sig buffer in bytes.
  * \param slen      The address at which to store the actual length of
  *                  the signature written. Must not be \c NULL.
  * \param f_rng     The RNG function. This must not be \c NULL if
@@ -355,7 +354,7 @@
 int mbedtls_ecdsa_write_signature_restartable( mbedtls_ecdsa_context *ctx,
                            mbedtls_md_type_t md_alg,
                            const unsigned char *hash, size_t hlen,
-                           unsigned char *sig, size_t *slen,
+                           unsigned char *sig, size_t sig_size, size_t *slen,
                            int (*f_rng)(void *, unsigned char *, size_t),
                            void *p_rng,
                            mbedtls_ecdsa_restart_ctx *rs_ctx );
diff --git a/include/mbedtls/ecjpake.h b/include/mbedtls/ecjpake.h
index 891705d..a73f624 100644
--- a/include/mbedtls/ecjpake.h
+++ b/include/mbedtls/ecjpake.h
@@ -21,6 +21,7 @@
  */
 #ifndef MBEDTLS_ECJPAKE_H
 #define MBEDTLS_ECJPAKE_H
+#include "mbedtls/private_access.h"
 
 /*
  * J-PAKE is a password-authenticated key exchange that allows deriving a
@@ -38,11 +39,7 @@
  * The payloads are serialized in a way suitable for use in TLS, but could
  * also be use outside TLS.
  */
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ecp.h"
 #include "mbedtls/md.h"
@@ -73,21 +70,21 @@
  */
 typedef struct mbedtls_ecjpake_context
 {
-    const mbedtls_md_info_t *md_info;   /**< Hash to use                    */
-    mbedtls_ecp_group grp;              /**< Elliptic curve                 */
-    mbedtls_ecjpake_role role;          /**< Are we client or server?       */
-    int point_format;                   /**< Format for point export        */
+    const mbedtls_md_info_t *MBEDTLS_PRIVATE(md_info);   /**< Hash to use                    */
+    mbedtls_ecp_group MBEDTLS_PRIVATE(grp);              /**< Elliptic curve                 */
+    mbedtls_ecjpake_role MBEDTLS_PRIVATE(role);          /**< Are we client or server?       */
+    int MBEDTLS_PRIVATE(point_format);                   /**< Format for point export        */
 
-    mbedtls_ecp_point Xm1;              /**< My public key 1   C: X1, S: X3 */
-    mbedtls_ecp_point Xm2;              /**< My public key 2   C: X2, S: X4 */
-    mbedtls_ecp_point Xp1;              /**< Peer public key 1 C: X3, S: X1 */
-    mbedtls_ecp_point Xp2;              /**< Peer public key 2 C: X4, S: X2 */
-    mbedtls_ecp_point Xp;               /**< Peer public key   C: Xs, S: Xc */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Xm1);              /**< My public key 1   C: X1, S: X3 */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Xm2);              /**< My public key 2   C: X2, S: X4 */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Xp1);              /**< Peer public key 1 C: X3, S: X1 */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Xp2);              /**< Peer public key 2 C: X4, S: X2 */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Xp);               /**< Peer public key   C: Xs, S: Xc */
 
-    mbedtls_mpi xm1;                    /**< My private key 1  C: x1, S: x3 */
-    mbedtls_mpi xm2;                    /**< My private key 2  C: x2, S: x4 */
+    mbedtls_mpi MBEDTLS_PRIVATE(xm1);                    /**< My private key 1  C: x1, S: x3 */
+    mbedtls_mpi MBEDTLS_PRIVATE(xm2);                    /**< My private key 2  C: x2, S: x4 */
 
-    mbedtls_mpi s;                      /**< Pre-shared secret (passphrase) */
+    mbedtls_mpi MBEDTLS_PRIVATE(s);                      /**< Pre-shared secret (passphrase) */
 } mbedtls_ecjpake_context;
 
 #else  /* MBEDTLS_ECJPAKE_ALT */
@@ -131,6 +128,21 @@
                            size_t len );
 
 /**
+ * \brief               Set the point format for future reads and writes.
+ *
+ * \param ctx           The ECJPAKE context to configure.
+ * \param point_format  The point format to use:
+ *                      #MBEDTLS_ECP_PF_UNCOMPRESSED (default)
+ *                      or #MBEDTLS_ECP_PF_COMPRESSED.
+ *
+ * \return              \c 0 if successful.
+ * \return              #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p point_format
+ *                      is invalid.
+ */
+int mbedtls_ecjpake_set_point_format( mbedtls_ecjpake_context *ctx,
+                                      int point_format );
+
+/**
  * \brief           Check if an ECJPAKE context is ready for use.
  *
  * \param ctx       The ECJPAKE context to check. This must be
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index dd400a0..384d060 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -33,27 +33,33 @@
 
 #ifndef MBEDTLS_ECP_H
 #define MBEDTLS_ECP_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/bignum.h"
 
 /*
  * ECP error codes
  */
-#define MBEDTLS_ERR_ECP_BAD_INPUT_DATA                    -0x4F80  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL                  -0x4F00  /**< The buffer is too small to write to. */
-#define MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE               -0x4E80  /**< The requested feature is not available, for example, the requested curve is not supported. */
-#define MBEDTLS_ERR_ECP_VERIFY_FAILED                     -0x4E00  /**< The signature is not valid. */
-#define MBEDTLS_ERR_ECP_ALLOC_FAILED                      -0x4D80  /**< Memory allocation failed. */
-#define MBEDTLS_ERR_ECP_RANDOM_FAILED                     -0x4D00  /**< Generation of random value, such as ephemeral key, failed. */
-#define MBEDTLS_ERR_ECP_INVALID_KEY                       -0x4C80  /**< Invalid private or public key. */
-#define MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH                  -0x4C00  /**< The buffer contains a valid signature followed by more data. */
-#define MBEDTLS_ERR_ECP_IN_PROGRESS                       -0x4B00  /**< Operation in progress, call again with the same parameters to continue. */
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_ECP_BAD_INPUT_DATA                    -0x4F80
+/** The buffer is too small to write to. */
+#define MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL                  -0x4F00
+/** The requested feature is not available, for example, the requested curve is not supported. */
+#define MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE               -0x4E80
+/** The signature is not valid. */
+#define MBEDTLS_ERR_ECP_VERIFY_FAILED                     -0x4E00
+/** Memory allocation failed. */
+#define MBEDTLS_ERR_ECP_ALLOC_FAILED                      -0x4D80
+/** Generation of random value, such as ephemeral key, failed. */
+#define MBEDTLS_ERR_ECP_RANDOM_FAILED                     -0x4D00
+/** Invalid private or public key. */
+#define MBEDTLS_ERR_ECP_INVALID_KEY                       -0x4C80
+/** The buffer contains a valid signature followed by more data. */
+#define MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH                  -0x4C00
+/** Operation in progress, call again with the same parameters to continue. */
+#define MBEDTLS_ERR_ECP_IN_PROGRESS                       -0x4B00
 
 /* Flags indicating whether to include code that is specific to certain
  * types of curves. These flags are for internal library use only. */
@@ -92,15 +98,17 @@
  * - Add it at the end of this enum, otherwise you'll break the ABI by
  *   changing the numerical value for existing curves.
  * - Increment MBEDTLS_ECP_DP_MAX below if needed.
+ * - Update the calculation of MBEDTLS_ECP_MAX_BITS below.
  * - Add the corresponding MBEDTLS_ECP_DP_xxx_ENABLED macro definition to
- *   config.h.
+ *   mbedtls_config.h.
  * - List the curve as a dependency of MBEDTLS_ECP_C and
  *   MBEDTLS_ECDSA_C if supported in check_config.h.
  * - Add the curve to the appropriate curve type macro
  *   MBEDTLS_ECP_yyy_ENABLED above.
  * - Add the necessary definitions to ecp_curves.c.
  * - Add the curve to the ecp_supported_curves array in ecp.c.
- * - Add the curve to applicable profiles in x509_crt.c if applicable.
+ * - Add the curve to applicable profiles in x509_crt.c.
+ * - Add the curve to applicable presets in ssl_tls.c.
  */
 typedef enum
 {
@@ -142,10 +150,10 @@
  */
 typedef struct mbedtls_ecp_curve_info
 {
-    mbedtls_ecp_group_id grp_id;    /*!< An internal identifier. */
-    uint16_t tls_id;                /*!< The TLS NamedCurve identifier. */
-    uint16_t bit_size;              /*!< The curve size in bits. */
-    const char *name;               /*!< A human-friendly name. */
+    mbedtls_ecp_group_id MBEDTLS_PRIVATE(grp_id);    /*!< An internal identifier. */
+    uint16_t MBEDTLS_PRIVATE(tls_id);                /*!< The TLS NamedCurve identifier. */
+    uint16_t MBEDTLS_PRIVATE(bit_size);              /*!< The curve size in bits. */
+    const char *MBEDTLS_PRIVATE(name);               /*!< A human-friendly name. */
 } mbedtls_ecp_curve_info;
 
 /**
@@ -161,9 +169,9 @@
  */
 typedef struct mbedtls_ecp_point
 {
-    mbedtls_mpi X;          /*!< The X coordinate of the ECP point. */
-    mbedtls_mpi Y;          /*!< The Y coordinate of the ECP point. */
-    mbedtls_mpi Z;          /*!< The Z coordinate of the ECP point. */
+    mbedtls_mpi MBEDTLS_PRIVATE(X);          /*!< The X coordinate of the ECP point. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Y);          /*!< The Y coordinate of the ECP point. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Z);          /*!< The Z coordinate of the ECP point. */
 }
 mbedtls_ecp_point;
 
@@ -203,10 +211,16 @@
  * additions or subtractions. Therefore, it is only an approximative modular
  * reduction. It must return 0 on success and non-zero on failure.
  *
- * \note        Alternative implementations must keep the group IDs distinct. If
- *              two group structures have the same ID, then they must be
- *              identical.
- *
+ * \note        Alternative implementations of the ECP module must obey the
+ *              following constraints.
+ *              * Group IDs must be distinct: if two group structures have
+ *                the same ID, then they must be identical.
+ *              * The fields \c id, \c P, \c A, \c B, \c G, \c N,
+ *                \c pbits and \c nbits must have the same type and semantics
+ *                as in the built-in implementation.
+ *                They must be available for reading, but direct modification
+ *                of these fields does not need to be supported.
+ *                They do not need to be at the same offset in the structure.
  */
 typedef struct mbedtls_ecp_group
 {
@@ -222,14 +236,16 @@
     size_t nbits;               /*!< For Short Weierstrass: The number of bits in \p P.
                                      For Montgomery curves: the number of bits in the
                                      private keys. */
-    unsigned int h;             /*!< \internal 1 if the constants are static. */
-    int (*modp)(mbedtls_mpi *); /*!< The function for fast pseudo-reduction
+    /* End of public fields */
+
+    unsigned int MBEDTLS_PRIVATE(h);             /*!< \internal 1 if the constants are static. */
+    int (*MBEDTLS_PRIVATE(modp))(mbedtls_mpi *); /*!< The function for fast pseudo-reduction
                                      mod \p P (see above).*/
-    int (*t_pre)(mbedtls_ecp_point *, void *);  /*!< Unused. */
-    int (*t_post)(mbedtls_ecp_point *, void *); /*!< Unused. */
-    void *t_data;               /*!< Unused. */
-    mbedtls_ecp_point *T;       /*!< Pre-computed points for ecp_mul_comb(). */
-    size_t T_size;              /*!< The number of pre-computed points. */
+    int (*MBEDTLS_PRIVATE(t_pre))(mbedtls_ecp_point *, void *);  /*!< Unused. */
+    int (*MBEDTLS_PRIVATE(t_post))(mbedtls_ecp_point *, void *); /*!< Unused. */
+    void *MBEDTLS_PRIVATE(t_data);               /*!< Unused. */
+    mbedtls_ecp_point *MBEDTLS_PRIVATE(T);       /*!< Pre-computed points for ecp_mul_comb(). */
+    size_t MBEDTLS_PRIVATE(T_size);              /*!< The number of dynamic allocated pre-computed points. */
 }
 mbedtls_ecp_group;
 
@@ -237,24 +253,15 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h, or define them using the compiler command line.
+ * Either change them in mbedtls_config.h, or define them using the compiler command line.
  * \{
  */
 
-#if !defined(MBEDTLS_ECP_MAX_BITS)
-/**
- * The maximum size of the groups, that is, of \c N and \c P.
- */
-#define MBEDTLS_ECP_MAX_BITS     521   /**< The maximum size of groups, in bits. */
-#endif
-
-#define MBEDTLS_ECP_MAX_BYTES    ( ( MBEDTLS_ECP_MAX_BITS + 7 ) / 8 )
-#define MBEDTLS_ECP_MAX_PT_LEN   ( 2 * MBEDTLS_ECP_MAX_BYTES + 1 )
-
 #if !defined(MBEDTLS_ECP_WINDOW_SIZE)
 /*
  * Maximum "window" size used for point multiplication.
- * Default: 6.
+ * Default: a point where higher memory usage yields disminishing performance
+ *          returns.
  * Minimum value: 2. Maximum value: 7.
  *
  * Result is an array of at most ( 1 << ( MBEDTLS_ECP_WINDOW_SIZE - 1 ) )
@@ -271,20 +278,21 @@
  *      224       475     475     453     398     342
  *      192       640     640     633     587     476
  */
-#define MBEDTLS_ECP_WINDOW_SIZE    6   /**< The maximum window size used. */
+#define MBEDTLS_ECP_WINDOW_SIZE    4   /**< The maximum window size used. */
 #endif /* MBEDTLS_ECP_WINDOW_SIZE */
 
 #if !defined(MBEDTLS_ECP_FIXED_POINT_OPTIM)
 /*
- * Trade memory for speed on fixed-point multiplication.
+ * Trade code size for speed on fixed-point multiplication.
  *
  * This speeds up repeated multiplication of the generator (that is, the
  * multiplication in ECDSA signatures, and half of the multiplications in
  * ECDSA verification and ECDHE) by a factor roughly 3 to 4.
  *
- * The cost is increasing EC peak memory usage by a factor roughly 2.
+ * For each n-bit Short Weierstrass curve that is enabled, this adds 4n bytes
+ * of code size if n < 384 and 8n otherwise.
  *
- * Change this value to 0 to reduce peak memory usage.
+ * Change this value to 0 to reduce code size.
  */
 #define MBEDTLS_ECP_FIXED_POINT_OPTIM  1   /**< Enable fixed-point speed-up. */
 #endif /* MBEDTLS_ECP_FIXED_POINT_OPTIM */
@@ -295,6 +303,47 @@
 #include "ecp_alt.h"
 #endif /* MBEDTLS_ECP_ALT */
 
+/**
+ * The maximum size of the groups, that is, of \c N and \c P.
+ */
+#if !defined(MBEDTLS_ECP_C)
+/* Dummy definition to help code that has optional ECP support and
+ * defines an MBEDTLS_ECP_MAX_BYTES-sized array unconditionally. */
+#define MBEDTLS_ECP_MAX_BITS 1
+/* Note: the curves must be listed in DECREASING size! */
+#elif defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 521
+#elif defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 512
+#elif defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 448
+#elif defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 384
+#elif defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 384
+#elif defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 256
+#elif defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 256
+#elif defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 256
+#elif defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 255
+#elif defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 225 // n is slightly above 2^224
+#elif defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 224
+#elif defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 192
+#elif defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
+#define MBEDTLS_ECP_MAX_BITS 192
+#else
+#error "Missing definition of MBEDTLS_ECP_MAX_BITS"
+#endif
+
+#define MBEDTLS_ECP_MAX_BYTES    ( ( MBEDTLS_ECP_MAX_BITS + 7 ) / 8 )
+#define MBEDTLS_ECP_MAX_PT_LEN   ( 2 * MBEDTLS_ECP_MAX_BYTES + 1 )
+
 #if defined(MBEDTLS_ECP_RESTARTABLE)
 
 /**
@@ -316,10 +365,10 @@
  */
 typedef struct
 {
-    unsigned ops_done;                  /*!<  current ops count             */
-    unsigned depth;                     /*!<  call depth (0 = top-level)    */
-    mbedtls_ecp_restart_mul_ctx *rsm;   /*!<  ecp_mul_comb() sub-context    */
-    mbedtls_ecp_restart_muladd_ctx *ma; /*!<  ecp_muladd() sub-context      */
+    unsigned MBEDTLS_PRIVATE(ops_done);                  /*!<  current ops count             */
+    unsigned MBEDTLS_PRIVATE(depth);                     /*!<  call depth (0 = top-level)    */
+    mbedtls_ecp_restart_mul_ctx *MBEDTLS_PRIVATE(rsm);   /*!<  ecp_mul_comb() sub-context    */
+    mbedtls_ecp_restart_muladd_ctx *MBEDTLS_PRIVATE(ma); /*!<  ecp_muladd() sub-context      */
 } mbedtls_ecp_restart_ctx;
 
 /*
@@ -369,9 +418,9 @@
  */
 typedef struct mbedtls_ecp_keypair
 {
-    mbedtls_ecp_group grp;      /*!<  Elliptic curve and base point     */
-    mbedtls_mpi d;              /*!<  our secret value                  */
-    mbedtls_ecp_point Q;        /*!<  our public value                  */
+    mbedtls_ecp_group MBEDTLS_PRIVATE(grp);      /*!<  Elliptic curve and base point     */
+    mbedtls_mpi MBEDTLS_PRIVATE(d);              /*!<  our secret value                  */
+    mbedtls_ecp_point MBEDTLS_PRIVATE(Q);        /*!<  our public value                  */
 }
 mbedtls_ecp_keypair;
 
@@ -462,8 +511,7 @@
 
 /**
  * \brief           This function retrieves the information defined in
- *                  mbedtls_ecp_curve_info() for all supported curves in order
- *                  of preference.
+ *                  mbedtls_ecp_curve_info() for all supported curves.
  *
  * \note            This function returns information about all curves
  *                  supported by the library. Some curves may not be
@@ -868,15 +916,8 @@
  * \note            To prevent timing attacks, this function
  *                  executes the exact same sequence of base-field
  *                  operations for any valid \p m. It avoids any if-branch or
- *                  array index depending on the value of \p m.
- *
- * \note            If \p f_rng is not NULL, it is used to randomize
- *                  intermediate results to prevent potential timing attacks
- *                  targeting these results. We recommend always providing
- *                  a non-NULL \p f_rng. The overhead is negligible.
- *                  Note: unless #MBEDTLS_ECP_NO_INTERNAL_RNG is defined, when
- *                  \p f_rng is NULL, an internal RNG (seeded from the value
- *                  of \p m) will be used instead.
+ *                  array index depending on the value of \p m. If also uses
+ *                  \p f_rng to randomize some intermediate results.
  *
  * \param grp       The ECP group to use.
  *                  This must be initialized and have group parameters
@@ -885,9 +926,9 @@
  *                  This must be initialized.
  * \param m         The integer by which to multiply. This must be initialized.
  * \param P         The point to multiply. This must be initialized.
- * \param f_rng     The RNG function. This may be \c NULL if randomization
- *                  of intermediate results isn't desired (discouraged).
- * \param p_rng     The RNG context to be passed to \p p_rng.
+ * \param f_rng     The RNG function. This must not be \c NULL.
+ * \param p_rng     The RNG context to be passed to \p f_rng. This may be \c
+ *                  NULL if \p f_rng doesn't need a context.
  *
  * \return          \c 0 on success.
  * \return          #MBEDTLS_ERR_ECP_INVALID_KEY if \p m is not a valid private
@@ -916,9 +957,9 @@
  *                  This must be initialized.
  * \param m         The integer by which to multiply. This must be initialized.
  * \param P         The point to multiply. This must be initialized.
- * \param f_rng     The RNG function. This may be \c NULL if randomization
- *                  of intermediate results isn't desired (discouraged).
- * \param p_rng     The RNG context to be passed to \p p_rng.
+ * \param f_rng     The RNG function. This must not be \c NULL.
+ * \param p_rng     The RNG context to be passed to \p f_rng. This may be \c
+ *                  NULL if \p f_rng doesn't need a context.
  * \param rs_ctx    The restart context (NULL disables restart).
  *
  * \return          \c 0 on success.
@@ -1222,14 +1263,18 @@
  *                  part is ignored.
  * \param prv       The keypair structure holding the full keypair.
  *                  This must be initialized.
+ * \param f_rng     The RNG function. This must not be \c NULL.
+ * \param p_rng     The RNG context to be passed to \p f_rng. This may be \c
+ *                  NULL if \p f_rng doesn't need a context.
  *
  * \return          \c 0 on success, meaning that the keys are valid and match.
  * \return          #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the keys are invalid or do not match.
  * \return          An \c MBEDTLS_ERR_ECP_XXX or an \c MBEDTLS_ERR_MPI_XXX
  *                  error code on calculation failure.
  */
-int mbedtls_ecp_check_pub_priv( const mbedtls_ecp_keypair *pub,
-                                const mbedtls_ecp_keypair *prv );
+int mbedtls_ecp_check_pub_priv(
+        const mbedtls_ecp_keypair *pub, const mbedtls_ecp_keypair *prv,
+        int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
 
 #if defined(MBEDTLS_SELF_TEST)
 
diff --git a/include/mbedtls/entropy.h b/include/mbedtls/entropy.h
index c51e641..128ec82 100644
--- a/include/mbedtls/entropy.h
+++ b/include/mbedtls/entropy.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_ENTROPY_H
 #define MBEDTLS_ENTROPY_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 
@@ -45,17 +42,22 @@
 #endif
 
 
-#define MBEDTLS_ERR_ENTROPY_SOURCE_FAILED                 -0x003C  /**< Critical entropy source failure. */
-#define MBEDTLS_ERR_ENTROPY_MAX_SOURCES                   -0x003E  /**< No more sources can be added. */
-#define MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED            -0x0040  /**< No sources have been added to poll. */
-#define MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE              -0x003D  /**< No strong sources have been added to poll. */
-#define MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR                 -0x003F  /**< Read/write error in file. */
+/** Critical entropy source failure. */
+#define MBEDTLS_ERR_ENTROPY_SOURCE_FAILED                 -0x003C
+/** No more sources can be added. */
+#define MBEDTLS_ERR_ENTROPY_MAX_SOURCES                   -0x003E
+/** No sources have been added to poll. */
+#define MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED            -0x0040
+/** No strong sources have been added to poll. */
+#define MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE              -0x003D
+/** Read/write error in file. */
+#define MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR                 -0x003F
 
 /**
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
@@ -104,11 +106,11 @@
  */
 typedef struct mbedtls_entropy_source_state
 {
-    mbedtls_entropy_f_source_ptr    f_source;   /**< The entropy source callback */
-    void *          p_source;   /**< The callback data pointer */
-    size_t          size;       /**< Amount received in bytes */
-    size_t          threshold;  /**< Minimum bytes required before release */
-    int             strong;     /**< Is the source strong? */
+    mbedtls_entropy_f_source_ptr    MBEDTLS_PRIVATE(f_source);   /**< The entropy source callback */
+    void *          MBEDTLS_PRIVATE(p_source);   /**< The callback data pointer */
+    size_t          MBEDTLS_PRIVATE(size);       /**< Amount received in bytes */
+    size_t          MBEDTLS_PRIVATE(threshold);  /**< Minimum bytes required before release */
+    int             MBEDTLS_PRIVATE(strong);     /**< Is the source strong? */
 }
 mbedtls_entropy_source_state;
 
@@ -117,21 +119,21 @@
  */
 typedef struct mbedtls_entropy_context
 {
-    int accumulator_started; /* 0 after init.
+    int MBEDTLS_PRIVATE(accumulator_started); /* 0 after init.
                               * 1 after the first update.
                               * -1 after free. */
 #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
-    mbedtls_sha512_context  accumulator;
+    mbedtls_sha512_context  MBEDTLS_PRIVATE(accumulator);
 #else
-    mbedtls_sha256_context  accumulator;
+    mbedtls_sha256_context  MBEDTLS_PRIVATE(accumulator);
 #endif
-    int             source_count; /* Number of entries used in source. */
-    mbedtls_entropy_source_state    source[MBEDTLS_ENTROPY_MAX_SOURCES];
+    int             MBEDTLS_PRIVATE(source_count); /* Number of entries used in source. */
+    mbedtls_entropy_source_state    MBEDTLS_PRIVATE(source)[MBEDTLS_ENTROPY_MAX_SOURCES];
 #if defined(MBEDTLS_THREADING_C)
-    mbedtls_threading_mutex_t mutex;    /*!< mutex                  */
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);    /*!< mutex                  */
 #endif
 #if defined(MBEDTLS_ENTROPY_NV_SEED)
-    int initial_entropy_run;
+    int MBEDTLS_PRIVATE(initial_entropy_run);
 #endif
 }
 mbedtls_entropy_context;
diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 199ea3d..27420ce 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -22,11 +22,7 @@
 #ifndef MBEDTLS_ERROR_H
 #define MBEDTLS_ERROR_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 
@@ -61,11 +57,9 @@
  * ERROR     2  0x006E          0x0001
  * MPI       7  0x0002-0x0010
  * GCM       3  0x0012-0x0014   0x0013-0x0013
- * BLOWFISH  3  0x0016-0x0018   0x0017-0x0017
  * THREADING 3  0x001A-0x001E
  * AES       5  0x0020-0x0022   0x0021-0x0025
  * CAMELLIA  3  0x0024-0x0026   0x0027-0x0027
- * XTEA      2  0x0028-0x0028   0x0029-0x0029
  * BASE64    2  0x002A-0x002C
  * OID       1  0x002E-0x002E   0x000B-0x000B
  * PADLOCK   1  0x0030-0x0030
@@ -79,9 +73,6 @@
  * PBKDF2    1  0x007C-0x007C
  * HMAC_DRBG 4                  0x0003-0x0009
  * CCM       3                  0x000D-0x0011
- * ARC4      1                  0x0019-0x0019
- * MD2       1                  0x002B-0x002B
- * MD4       1                  0x002D-0x002D
  * MD5       1                  0x002F-0x002F
  * RIPEMD160 1                  0x0031-0x0031
  * SHA1      1                  0x0035-0x0035 0x0073-0x0073
@@ -106,10 +97,9 @@
  * HKDF      5   1 (Started from top)
  * SSL       5   2 (Started from 0x5F00)
  * CIPHER    6   8 (Started from 0x6080)
- * SSL       6   23 (Started from top, plus 0x6000, gaps at
- *                   0x6600)
- * SSL       7   28 (Started from 0x7080, gaps at
- *                   0x7300, 0x7500, 0x7580, 0x7800)
+ * SSL       6   22 (Started from top, plus 0x6000)
+ * SSL       7   20 (Started from 0x7000, gaps at
+ *                   0x7380, 0x7900-0x7980, 0x7A80-0x7E80)
  *
  * Module dependent error code (5 bits 0x.00.-0x.F8.)
  */
@@ -118,11 +108,15 @@
 extern "C" {
 #endif
 
-#define MBEDTLS_ERR_ERROR_GENERIC_ERROR       -0x0001  /**< Generic error */
-#define MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED -0x006E  /**< This is a bug in the library */
+/** Generic error */
+#define MBEDTLS_ERR_ERROR_GENERIC_ERROR       -0x0001
+/** This is a bug in the library */
+#define MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED -0x006E
 
-#define MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED     -0x0070 /**< Hardware accelerator failed */
-#define MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED -0x0072 /**< The requested feature is not supported by the platform */
+/** Hardware accelerator failed */
+#define MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED     -0x0070
+/** The requested feature is not supported by the platform */
+#define MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED -0x0072
 
 /**
  * \brief Combines a high-level and low-level error code together.
diff --git a/include/mbedtls/gcm.h b/include/mbedtls/gcm.h
index a2fc2ab..9d9155f 100644
--- a/include/mbedtls/gcm.h
+++ b/include/mbedtls/gcm.h
@@ -30,12 +30,9 @@
 
 #ifndef MBEDTLS_GCM_H
 #define MBEDTLS_GCM_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/cipher.h"
 
@@ -44,8 +41,10 @@
 #define MBEDTLS_GCM_ENCRYPT     1
 #define MBEDTLS_GCM_DECRYPT     0
 
-#define MBEDTLS_ERR_GCM_AUTH_FAILED                       -0x0012  /**< Authenticated decryption failed. */
-#define MBEDTLS_ERR_GCM_BAD_INPUT                         -0x0014  /**< Bad input parameters to function. */
+/** Authenticated decryption failed. */
+#define MBEDTLS_ERR_GCM_AUTH_FAILED                       -0x0012
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_GCM_BAD_INPUT                         -0x0014
 
 #ifdef __cplusplus
 extern "C" {
@@ -58,15 +57,15 @@
  */
 typedef struct mbedtls_gcm_context
 {
-    mbedtls_cipher_context_t cipher_ctx;  /*!< The cipher context used. */
-    uint64_t HL[16];                      /*!< Precalculated HTable low. */
-    uint64_t HH[16];                      /*!< Precalculated HTable high. */
-    uint64_t len;                         /*!< The total length of the encrypted data. */
-    uint64_t add_len;                     /*!< The total length of the additional data. */
-    unsigned char base_ectr[16];          /*!< The first ECTR for tag. */
-    unsigned char y[16];                  /*!< The Y working value. */
-    unsigned char buf[16];                /*!< The buf working value. */
-    int mode;                             /*!< The operation to perform:
+    mbedtls_cipher_context_t MBEDTLS_PRIVATE(cipher_ctx);  /*!< The cipher context used. */
+    uint64_t MBEDTLS_PRIVATE(HL)[16];                      /*!< Precalculated HTable low. */
+    uint64_t MBEDTLS_PRIVATE(HH)[16];                      /*!< Precalculated HTable high. */
+    uint64_t MBEDTLS_PRIVATE(len);                         /*!< The total length of the encrypted data. */
+    uint64_t MBEDTLS_PRIVATE(add_len);                     /*!< The total length of the additional data. */
+    unsigned char MBEDTLS_PRIVATE(base_ectr)[16];          /*!< The first ECTR for tag. */
+    unsigned char MBEDTLS_PRIVATE(y)[16];                  /*!< The Y working value. */
+    unsigned char MBEDTLS_PRIVATE(buf)[16];                /*!< The buf working value. */
+    int MBEDTLS_PRIVATE(mode);                             /*!< The operation to perform:
                                                #MBEDTLS_GCM_ENCRYPT or
                                                #MBEDTLS_GCM_DECRYPT. */
 }
@@ -245,11 +244,6 @@
  *                  you do not need to call this function. You may not
  *                  call this function after calling mbedtls_cipher_update().
  *
- * \note            This function may only be called once per operation:
- *                  you must pass the whole associated data in a single
- *                  call. This limitation will be lifted in a future version
- *                  of Mbed TLS.
- *
  * \param ctx       The GCM context. This must have been started with
  *                  mbedtls_gcm_starts() and must not have yet received
  *                  any input with mbedtls_gcm_update().
@@ -343,6 +337,10 @@
  *                    then mbedtls_gcm_finish() never produces any output,
  *                    so \p output_size can be \c 0.
  *                  - \p output_size never needs to be more than \c 15.
+ * \param output_length On success, \p *output_length contains the actual
+ *                      length of the output written in \p output.
+ *                      On failure, the content of \p *output_length is
+ *                      unspecified.
  *
  * \return          \c 0 on success.
  * \return          #MBEDTLS_ERR_GCM_BAD_INPUT on failure:
@@ -351,6 +349,7 @@
  */
 int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
                         unsigned char *output, size_t output_size,
+                        size_t *output_length,
                         unsigned char *tag, size_t tag_len );
 
 /**
diff --git a/include/mbedtls/hkdf.h b/include/mbedtls/hkdf.h
index 2e6b363..e6bfe05 100644
--- a/include/mbedtls/hkdf.h
+++ b/include/mbedtls/hkdf.h
@@ -25,11 +25,7 @@
 #ifndef MBEDTLS_HKDF_H
 #define MBEDTLS_HKDF_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/md.h"
 
@@ -37,7 +33,8 @@
  *  \name HKDF Error codes
  *  \{
  */
-#define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA  -0x5F80  /**< Bad input parameters to function. */
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_HKDF_BAD_INPUT_DATA  -0x5F80
 /* \} name */
 
 #ifdef __cplusplus
diff --git a/include/mbedtls/hmac_drbg.h b/include/mbedtls/hmac_drbg.h
index 1ab3422..0f1653f 100644
--- a/include/mbedtls/hmac_drbg.h
+++ b/include/mbedtls/hmac_drbg.h
@@ -25,12 +25,9 @@
  */
 #ifndef MBEDTLS_HMAC_DRBG_H
 #define MBEDTLS_HMAC_DRBG_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/md.h"
 
@@ -41,16 +38,20 @@
 /*
  * Error codes
  */
-#define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG              -0x0003  /**< Too many random requested in single call. */
-#define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG                -0x0005  /**< Input too large (Entropy + additional). */
-#define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR                -0x0007  /**< Read/write error in file. */
-#define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED        -0x0009  /**< The entropy source failed. */
+/** Too many random requested in single call. */
+#define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG              -0x0003
+/** Input too large (Entropy + additional). */
+#define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG                -0x0005
+/** Read/write error in file. */
+#define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR                -0x0007
+/** The entropy source failed. */
+#define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED        -0x0009
 
 /**
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
@@ -86,19 +87,19 @@
 {
     /* Working state: the key K is not stored explicitly,
      * but is implied by the HMAC context */
-    mbedtls_md_context_t md_ctx;                    /*!< HMAC context (inc. K)  */
-    unsigned char V[MBEDTLS_MD_MAX_SIZE];  /*!< V in the spec          */
-    int reseed_counter;                     /*!< reseed counter         */
+    mbedtls_md_context_t MBEDTLS_PRIVATE(md_ctx);                    /*!< HMAC context (inc. K)  */
+    unsigned char MBEDTLS_PRIVATE(V)[MBEDTLS_MD_MAX_SIZE];  /*!< V in the spec          */
+    int MBEDTLS_PRIVATE(reseed_counter);                     /*!< reseed counter         */
 
     /* Administrative state */
-    size_t entropy_len;         /*!< entropy bytes grabbed on each (re)seed */
-    int prediction_resistance;  /*!< enable prediction resistance (Automatic
+    size_t MBEDTLS_PRIVATE(entropy_len);         /*!< entropy bytes grabbed on each (re)seed */
+    int MBEDTLS_PRIVATE(prediction_resistance);  /*!< enable prediction resistance (Automatic
                                      reseed before every random generation) */
-    int reseed_interval;        /*!< reseed interval   */
+    int MBEDTLS_PRIVATE(reseed_interval);        /*!< reseed interval   */
 
     /* Callbacks */
-    int (*f_entropy)(void *, unsigned char *, size_t); /*!< entropy function */
-    void *p_entropy;            /*!< context for the entropy function        */
+    int (*MBEDTLS_PRIVATE(f_entropy))(void *, unsigned char *, size_t); /*!< entropy function */
+    void *MBEDTLS_PRIVATE(p_entropy);            /*!< context for the entropy function        */
 
 #if defined(MBEDTLS_THREADING_C)
     /* Invariant: the mutex is initialized if and only if
@@ -109,7 +110,7 @@
      * Note that this invariant may change without notice. Do not rely on it
      * and do not access the mutex directly in application code.
      */
-    mbedtls_threading_mutex_t mutex;
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);
 #endif
 } mbedtls_hmac_drbg_context;
 
@@ -294,8 +295,8 @@
  * \return              \c 0 on success, or an error from the underlying
  *                      hash calculation.
  */
-int mbedtls_hmac_drbg_update_ret( mbedtls_hmac_drbg_context *ctx,
-                       const unsigned char *additional, size_t add_len );
+int mbedtls_hmac_drbg_update( mbedtls_hmac_drbg_context *ctx,
+                              const unsigned char *additional, size_t add_len );
 
 /**
  * \brief               This function reseeds the HMAC_DRBG context, that is
diff --git a/include/mbedtls/config.h b/include/mbedtls/mbedtls_config.h
similarity index 86%
rename from include/mbedtls/config.h
rename to include/mbedtls/mbedtls_config.h
index 1014091..d470c00 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -1,5 +1,5 @@
 /**
- * \file config.h
+ * \file mbedtls_config.h
  *
  * \brief Configuration options (set of defines)
  *
@@ -24,12 +24,14 @@
  *  limitations under the License.
  */
 
-#ifndef MBEDTLS_CONFIG_H
-#define MBEDTLS_CONFIG_H
-
-#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
-#define _CRT_SECURE_NO_DEPRECATE 1
-#endif
+/**
+ * This is an optional version symbol that enables comatibility handling of
+ * config files.
+ *
+ * It is equal to the #MBEDTLS_VERSION_NUMBER of the Mbed TLS version that
+ * introduced the config format we want to be compatible with.
+ */
+//#define MBEDTLS_CONFIG_VERSION 0x03000000
 
 /**
  * \name SECTION: System support
@@ -47,7 +49,6 @@
  *
  * Used in:
  *      library/aria.c
- *      library/timing.c
  *      library/bn_mul.h
  *
  * Required by:
@@ -255,72 +256,6 @@
  */
 //#define MBEDTLS_DEPRECATED_REMOVED
 
-/**
- * \def MBEDTLS_CHECK_PARAMS
- *
- * This configuration option controls whether the library validates more of
- * the parameters passed to it.
- *
- * When this flag is not defined, the library only attempts to validate an
- * input parameter if: (1) they may come from the outside world (such as the
- * network, the filesystem, etc.) or (2) not validating them could result in
- * internal memory errors such as overflowing a buffer controlled by the
- * library. On the other hand, it doesn't attempt to validate parameters whose
- * values are fully controlled by the application (such as pointers).
- *
- * When this flag is defined, the library additionally attempts to validate
- * parameters that are fully controlled by the application, and should always
- * be valid if the application code is fully correct and trusted.
- *
- * For example, when a function accepts as input a pointer to a buffer that may
- * contain untrusted data, and its documentation mentions that this pointer
- * must not be NULL:
- * - The pointer is checked to be non-NULL only if this option is enabled.
- * - The content of the buffer is always validated.
- *
- * When this flag is defined, if a library function receives a parameter that
- * is invalid:
- * 1. The function will invoke the macro MBEDTLS_PARAM_FAILED().
- * 2. If MBEDTLS_PARAM_FAILED() did not terminate the program, the function
- *   will immediately return. If the function returns an Mbed TLS error code,
- *   the error code in this case is MBEDTLS_ERR_xxx_BAD_INPUT_DATA.
- *
- * When defining this flag, you also need to arrange a definition for
- * MBEDTLS_PARAM_FAILED(). You can do this by any of the following methods:
- * - By default, the library defines MBEDTLS_PARAM_FAILED() to call a
- *   function mbedtls_param_failed(), but the library does not define this
- *   function. If you do not make any other arrangements, you must provide
- *   the function mbedtls_param_failed() in your application.
- *   See `platform_util.h` for its prototype.
- * - If you enable the macro #MBEDTLS_CHECK_PARAMS_ASSERT, then the
- *   library defines MBEDTLS_PARAM_FAILED(\c cond) to be `assert(cond)`.
- *   You can still supply an alternative definition of
- *   MBEDTLS_PARAM_FAILED(), which may call `assert`.
- * - If you define a macro MBEDTLS_PARAM_FAILED() before including `config.h`
- *   or you uncomment the definition of MBEDTLS_PARAM_FAILED() in `config.h`,
- *   the library will call the macro that you defined and will not supply
- *   its own version. Note that if MBEDTLS_PARAM_FAILED() calls `assert`,
- *   you need to enable #MBEDTLS_CHECK_PARAMS_ASSERT so that library source
- *   files include `<assert.h>`.
- *
- * Uncomment to enable validation of application-controlled parameters.
- */
-//#define MBEDTLS_CHECK_PARAMS
-
-/**
- * \def MBEDTLS_CHECK_PARAMS_ASSERT
- *
- * Allow MBEDTLS_PARAM_FAILED() to call `assert`, and make it default to
- * `assert`. This macro is only used if #MBEDTLS_CHECK_PARAMS is defined.
- *
- * If this macro is not defined, then MBEDTLS_PARAM_FAILED() defaults to
- * calling a function mbedtls_param_failed(). See the documentation of
- * #MBEDTLS_CHECK_PARAMS for details.
- *
- * Uncomment to allow MBEDTLS_PARAM_FAILED() to call `assert`.
- */
-//#define MBEDTLS_CHECK_PARAMS_ASSERT
-
 /* \} name SECTION: System support */
 
 /**
@@ -334,7 +269,7 @@
 /**
  * \def MBEDTLS_TIMING_ALT
  *
- * Uncomment to provide your own alternate implementation for mbedtls_timing_hardclock(),
+ * Uncomment to provide your own alternate implementation for
  * mbedtls_timing_get_timer(), mbedtls_set_alarm(), mbedtls_set/get_delay()
  *
  * Only works if you have MBEDTLS_TIMING_C enabled.
@@ -363,16 +298,14 @@
  * Uncomment a macro to enable alternate implementation of the corresponding
  * module.
  *
- * \warning   MD2, MD4, MD5, ARC4, DES and SHA-1 are considered weak and their
+ * \warning   MD5, DES and SHA-1 are considered weak and their
  *            use constitutes a security risk. If possible, we recommend
  *            avoiding dependencies on them, and considering stronger message
  *            digests and ciphers instead.
  *
  */
 //#define MBEDTLS_AES_ALT
-//#define MBEDTLS_ARC4_ALT
 //#define MBEDTLS_ARIA_ALT
-//#define MBEDTLS_BLOWFISH_ALT
 //#define MBEDTLS_CAMELLIA_ALT
 //#define MBEDTLS_CCM_ALT
 //#define MBEDTLS_CHACHA20_ALT
@@ -383,8 +316,6 @@
 //#define MBEDTLS_ECJPAKE_ALT
 //#define MBEDTLS_GCM_ALT
 //#define MBEDTLS_NIST_KW_ALT
-//#define MBEDTLS_MD2_ALT
-//#define MBEDTLS_MD4_ALT
 //#define MBEDTLS_MD5_ALT
 //#define MBEDTLS_POLY1305_ALT
 //#define MBEDTLS_RIPEMD160_ALT
@@ -392,7 +323,6 @@
 //#define MBEDTLS_SHA1_ALT
 //#define MBEDTLS_SHA256_ALT
 //#define MBEDTLS_SHA512_ALT
-//#define MBEDTLS_XTEA_ALT
 
 /*
  * When replacing the elliptic curve module, pleace consider, that it is
@@ -406,7 +336,7 @@
 //#define MBEDTLS_ECP_ALT
 
 /**
- * \def MBEDTLS_MD2_PROCESS_ALT
+ * \def MBEDTLS_SHA256_PROCESS_ALT
  *
  * MBEDTLS__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use you
  * alternate core implementation of symmetric crypto or hash function. Keep in
@@ -428,7 +358,7 @@
  * Uncomment a macro to enable alternate implementation of the corresponding
  * function.
  *
- * \warning   MD2, MD4, MD5, DES and SHA-1 are considered weak and their use
+ * \warning   MD5, DES and SHA-1 are considered weak and their use
  *            constitutes a security risk. If possible, we recommend avoiding
  *            dependencies on them, and considering stronger message digests
  *            and ciphers instead.
@@ -442,8 +372,6 @@
  *            implementation should be provided for mbedtls_ecdsa_sign_det_ext().
  *
  */
-//#define MBEDTLS_MD2_PROCESS_ALT
-//#define MBEDTLS_MD4_PROCESS_ALT
 //#define MBEDTLS_MD5_PROCESS_ALT
 //#define MBEDTLS_RIPEMD160_PROCESS_ALT
 //#define MBEDTLS_SHA1_PROCESS_ALT
@@ -683,26 +611,6 @@
 //#define MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
 
 /**
- * \def MBEDTLS_REMOVE_3DES_CIPHERSUITES
- *
- * Remove 3DES ciphersuites by default in SSL / TLS.
- * This flag removes the ciphersuites based on 3DES from the default list as
- * returned by mbedtls_ssl_list_ciphersuites(). However, it is still possible
- * to enable (some of) them with mbedtls_ssl_conf_ciphersuites() by including
- * them explicitly.
- *
- * A man-in-the-browser attacker can recover authentication tokens sent through
- * a TLS connection using a 3DES based cipher suite (see "On the Practical
- * (In-)Security of 64-bit Block Ciphers" by Karthikeyan Bhargavan and Gaëtan
- * Leurent, see https://sweet32.info/SWEET32_CCS16.pdf). If this attack falls
- * in your threat model or you are unsure, then you should keep this option
- * enabled to remove 3DES based cipher suites.
- *
- * Comment this macro to keep 3DES in the default ciphersuite list.
- */
-#define MBEDTLS_REMOVE_3DES_CIPHERSUITES
-
-/**
  * \def MBEDTLS_ECP_DP_SECP192R1_ENABLED
  *
  * MBEDTLS_ECP_XXXX_ENABLED: Enables specific curves within the Elliptic Curve
@@ -738,28 +646,6 @@
 #define MBEDTLS_ECP_NIST_OPTIM
 
 /**
- * \def MBEDTLS_ECP_NO_INTERNAL_RNG
- *
- * When this option is disabled, mbedtls_ecp_mul() will make use of an
- * internal RNG when called with a NULL \c f_rng argument, in order to protect
- * against some side-channel attacks.
- *
- * This protection introduces a dependency of the ECP module on one of the
- * DRBG modules. For very constrained implementations that don't require this
- * protection (for example, because you're only doing signature verification,
- * so not manipulating any secret, or because local/physical side-channel
- * attacks are outside your threat model), it might be desirable to get rid of
- * that dependency.
- *
- * \warning Enabling this option makes some uses of ECP vulnerable to some
- * side-channel attacks. Only enable it if you know that's not a problem for
- * your use case.
- *
- * Uncomment this macro to disable some counter-measures in ECP.
- */
-//#define MBEDTLS_ECP_NO_INTERNAL_RNG
-
-/**
  * \def MBEDTLS_ECP_RESTARTABLE
  *
  * Enable "non-blocking" ECC operations that can return early and be resumed.
@@ -779,40 +665,11 @@
  *
  * \note  This option only works with the default software implementation of
  *        elliptic curve functionality. It is incompatible with
- *        MBEDTLS_ECP_ALT, MBEDTLS_ECDH_XXX_ALT, MBEDTLS_ECDSA_XXX_ALT
- *        and MBEDTLS_ECDH_LEGACY_CONTEXT.
+ *        MBEDTLS_ECP_ALT, MBEDTLS_ECDH_XXX_ALT, MBEDTLS_ECDSA_XXX_ALT.
  */
 //#define MBEDTLS_ECP_RESTARTABLE
 
 /**
- * \def MBEDTLS_ECDH_LEGACY_CONTEXT
- *
- * Use a backward compatible ECDH context.
- *
- * Mbed TLS supports two formats for ECDH contexts (#mbedtls_ecdh_context
- * defined in `ecdh.h`). For most applications, the choice of format makes
- * no difference, since all library functions can work with either format,
- * except that the new format is incompatible with MBEDTLS_ECP_RESTARTABLE.
-
- * The new format used when this option is disabled is smaller
- * (56 bytes on a 32-bit platform). In future versions of the library, it
- * will support alternative implementations of ECDH operations.
- * The new format is incompatible with applications that access
- * context fields directly and with restartable ECP operations.
- *
- * Define this macro if you enable MBEDTLS_ECP_RESTARTABLE or if you
- * want to access ECDH context fields directly. Otherwise you should
- * comment out this macro definition.
- *
- * This option has no effect if #MBEDTLS_ECDH_C is not enabled.
- *
- * \note This configuration option is experimental. Future versions of the
- *       library may modify the way the ECDH context layout is configured
- *       and may modify the layout of the new context type.
- */
-#define MBEDTLS_ECDH_LEGACY_CONTEXT
-
-/**
  * \def MBEDTLS_ECDSA_DETERMINISTIC
  *
  * Enable deterministic ECDSA (RFC 6979).
@@ -843,7 +700,6 @@
  *      MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256
- *      MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA
  */
 #define MBEDTLS_KEY_EXCHANGE_PSK_ENABLED
 
@@ -866,7 +722,6 @@
  *      MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
- *      MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA
  *
  * \warning    Using DHE constitutes a security risk as it
  *             is not possible to validate custom DH parameters.
@@ -892,7 +747,6 @@
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256
- *      MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA
  */
 #define MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED
 
@@ -916,7 +770,6 @@
  *      MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256
- *      MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA
  */
 #define MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
 
@@ -942,7 +795,6 @@
  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
  *      MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
- *      MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
  */
 #define MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
 
@@ -968,7 +820,6 @@
  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
  *      MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
- *      MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
  *
  * \warning    Using DHE constitutes a security risk as it
  *             is not possible to validate custom DH parameters.
@@ -999,7 +850,6 @@
  *      MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
- *      MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
  */
 #define MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
 
@@ -1022,7 +872,6 @@
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256
  *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
- *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
  */
 #define MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
 
@@ -1035,7 +884,6 @@
  *
  * This enables the following ciphersuites (if other requisites are
  * enabled as well):
- *      MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
  *      MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
@@ -1058,7 +906,6 @@
  *
  * This enables the following ciphersuites (if other requisites are
  * enabled as well):
- *      MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
  *      MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
@@ -1139,8 +986,7 @@
 /**
  * \def MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
  *
- * Do not add default entropy sources. These are the platform specific
- * or mbedtls_timing_hardclock poll function.
+ * Do not add default entropy sources in mbedtls_entropy_init().
  *
  * This is useful to have more control over the added entropy sources in an
  * application.
@@ -1597,16 +1443,6 @@
 #define MBEDTLS_SSL_RENEGOTIATION
 
 /**
- * \def MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE
- *
- * Pick the ciphersuite according to the client's preferences rather than ours
- * in the SSL Server module (MBEDTLS_SSL_SRV_C).
- *
- * Uncomment this macro to respect client's ciphersuite order
- */
-//#define MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE
-
-/**
  * \def MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
  *
  * Enable support for RFC 6066 max_fragment_length extension in SSL.
@@ -1715,7 +1551,7 @@
  * (see Section 5 of RFC 5764), are not handled by this feature.
  * Instead, after successful completion of a handshake negotiating
  * the use of DTLS-SRTP, the extended key exporter API
- * mbedtls_ssl_conf_export_keys_ext_cb() should be used to implement
+ * mbedtls_ssl_conf_export_keys_cb() should be used to implement
  * the key exporter described in Section 4.2 of RFC 5764 and RFC 5705
  * (this is implemented in the SSL example programs).
  * The resulting key should then be passed to an SRTP stack.
@@ -1784,15 +1620,6 @@
 #define MBEDTLS_SSL_SERVER_NAME_INDICATION
 
 /**
- * \def MBEDTLS_SSL_TRUNCATED_HMAC
- *
- * Enable support for RFC 6066 truncated HMAC in SSL.
- *
- * Comment this macro to disable support for truncated HMAC in SSL
- */
-#define MBEDTLS_SSL_TRUNCATED_HMAC
-
-/**
  * \def MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
  *
  * When this option is enabled, the SSL buffer will be resized automatically
@@ -1916,10 +1743,6 @@
  * Uncomment this to enable use of PSA Crypto configuration settings which
  * can be found in include/psa/crypto_config.h.
  *
- * If you enable this option and write your own configuration file, you must
- * include mbedtls/config_psa.h in your configuration file. The default
- * provided mbedtls/config.h contains the necessary inclusion.
- *
  * This feature is still experimental and is not ready for production since
  * it is not completed.
  */
@@ -1939,28 +1762,6 @@
 #define MBEDTLS_VERSION_FEATURES
 
 /**
- * \def MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
- *
- * If set, the X509 parser will not break-off when parsing an X509 certificate
- * and encountering an extension in a v1 or v2 certificate.
- *
- * Uncomment to prevent an error.
- */
-//#define MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3
-
-/**
- * \def MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
- *
- * If set, the X509 parser will not break-off when parsing an X509 certificate
- * and encountering an unknown critical extension.
- *
- * \warning Depending on your PKI use, enabling this can be a security risk!
- *
- * Uncomment to prevent an error.
- */
-//#define MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
-
-/**
  * \def MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
  *
  * If set, this enables the X.509 API `mbedtls_x509_crt_verify_with_ca_cb()`
@@ -1980,33 +1781,6 @@
 //#define MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK
 
 /**
- * \def MBEDTLS_X509_CHECK_KEY_USAGE
- *
- * Enable verification of the keyUsage extension (CA and leaf certificates).
- *
- * Disabling this avoids problems with mis-issued and/or misused
- * (intermediate) CA and leaf certificates.
- *
- * \warning Depending on your PKI use, disabling this can be a security risk!
- *
- * Comment to skip keyUsage checking for both CA and leaf certificates.
- */
-#define MBEDTLS_X509_CHECK_KEY_USAGE
-
-/**
- * \def MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
- *
- * Enable verification of the extendedKeyUsage extension (leaf certificates).
- *
- * Disabling this avoids problems with mis-issued and/or misused certificates.
- *
- * \warning Depending on your PKI use, disabling this can be a security risk!
- *
- * Comment to skip extendedKeyUsage checking for certificates.
- */
-#define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
-
-/**
  * \def MBEDTLS_X509_REMOVE_INFO
  *
  * Disable mbedtls_x509_*_info() and related APIs.
@@ -2125,24 +1899,6 @@
 #define MBEDTLS_AES_C
 
 /**
- * \def MBEDTLS_ARC4_C
- *
- * Enable the ARCFOUR stream cipher.
- *
- * Module:  library/arc4.c
- * Caller:  library/cipher.c
- *
- * This module enables the following ciphersuites (if other requisites are
- * enabled as well):
- *
- * \warning   ARC4 is considered a weak cipher and its use constitutes a
- *            security risk. If possible, we recommend avoidng dependencies on
- *            it, and considering stronger ciphers instead.
- *
- */
-#define MBEDTLS_ARC4_C
-
-/**
  * \def MBEDTLS_ASN1_PARSE_C
  *
  * Enable the generic ASN1 parser.
@@ -2200,15 +1956,6 @@
 #define MBEDTLS_BIGNUM_C
 
 /**
- * \def MBEDTLS_BLOWFISH_C
- *
- * Enable the Blowfish block cipher.
- *
- * Module:  library/blowfish.c
- */
-#define MBEDTLS_BLOWFISH_C
-
-/**
  * \def MBEDTLS_CAMELLIA_C
  *
  * Enable the Camellia block cipher.
@@ -2422,19 +2169,6 @@
  * Caller:  library/pem.c
  *          library/cipher.c
  *
- * This module enables the following ciphersuites (if other requisites are
- * enabled as well):
- *      MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA
- *      MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA
- *
  * PEM_PARSE uses DES/3DES for decrypting encrypted keys.
  *
  * \warning   DES is considered a weak cipher and its use constitutes a
@@ -2624,40 +2358,6 @@
 #define MBEDTLS_MD_C
 
 /**
- * \def MBEDTLS_MD2_C
- *
- * Enable the MD2 hash algorithm.
- *
- * Module:  library/md2.c
- * Caller:
- *
- * Uncomment to enable support for (rare) MD2-signed X.509 certs.
- *
- * \warning   MD2 is considered a weak message digest and its use constitutes a
- *            security risk. If possible, we recommend avoiding dependencies on
- *            it, and considering stronger message digests instead.
- *
- */
-//#define MBEDTLS_MD2_C
-
-/**
- * \def MBEDTLS_MD4_C
- *
- * Enable the MD4 hash algorithm.
- *
- * Module:  library/md4.c
- * Caller:
- *
- * Uncomment to enable support for (rare) MD4-signed X.509 certs.
- *
- * \warning   MD4 is considered a weak message digest and its use constitutes a
- *            security risk. If possible, we recommend avoiding dependencies on
- *            it, and considering stronger message digests instead.
- *
- */
-//#define MBEDTLS_MD4_C
-
-/**
  * \def MBEDTLS_MD5_C
  *
  * Enable the MD5 hash algorithm.
@@ -2852,7 +2552,6 @@
  * Caller:  library/pkparse.c
  *
  * Requires: MBEDTLS_ASN1_PARSE_C, MBEDTLS_CIPHER_C, MBEDTLS_MD_C
- * Can use:  MBEDTLS_ARC4_C
  *
  * This module enables PKCS#12 functions.
  */
@@ -3297,16 +2996,6 @@
  */
 #define MBEDTLS_X509_CSR_WRITE_C
 
-/**
- * \def MBEDTLS_XTEA_C
- *
- * Enable the XTEA block cipher.
- *
- * Module:  library/xtea.c
- * Caller:
- */
-#define MBEDTLS_XTEA_C
-
 /* \} name SECTION: mbed TLS modules */
 
 /**
@@ -3342,8 +3031,7 @@
 //#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT      384 /**< Maximum size of (re)seed buffer */
 
 /* ECP options */
-//#define MBEDTLS_ECP_MAX_BITS             521 /**< Maximum bit size of groups */
-//#define MBEDTLS_ECP_WINDOW_SIZE            6 /**< Maximum window size used */
+//#define MBEDTLS_ECP_WINDOW_SIZE            4 /**< Maximum window size used */
 //#define MBEDTLS_ECP_FIXED_POINT_OPTIM      1 /**< Enable fixed-point speed-up */
 
 /* Entropy options */
@@ -3385,42 +3073,6 @@
 //#define MBEDTLS_PLATFORM_NV_SEED_READ_MACRO   mbedtls_platform_std_nv_seed_read /**< Default nv_seed_read function to use, can be undefined */
 //#define MBEDTLS_PLATFORM_NV_SEED_WRITE_MACRO  mbedtls_platform_std_nv_seed_write /**< Default nv_seed_write function to use, can be undefined */
 
-/**
- * \brief       This macro is invoked by the library when an invalid parameter
- *              is detected that is only checked with #MBEDTLS_CHECK_PARAMS
- *              (see the documentation of that option for context).
- *
- *              When you leave this undefined here, the library provides
- *              a default definition. If the macro #MBEDTLS_CHECK_PARAMS_ASSERT
- *              is defined, the default definition is `assert(cond)`,
- *              otherwise the default definition calls a function
- *              mbedtls_param_failed(). This function is declared in
- *              `platform_util.h` for the benefit of the library, but
- *              you need to define in your application.
- *
- *              When you define this here, this replaces the default
- *              definition in platform_util.h (which no longer declares the
- *              function mbedtls_param_failed()) and it is your responsibility
- *              to make sure this macro expands to something suitable (in
- *              particular, that all the necessary declarations are visible
- *              from within the library - you can ensure that by providing
- *              them in this file next to the macro definition).
- *              If you define this macro to call `assert`, also define
- *              #MBEDTLS_CHECK_PARAMS_ASSERT so that library source files
- *              include `<assert.h>`.
- *
- *              Note that you may define this macro to expand to nothing, in
- *              which case you don't have to worry about declarations or
- *              definitions. However, you will then be notified about invalid
- *              parameters only in non-void functions, and void function will
- *              just silently return early on invalid parameters, which
- *              partially negates the benefits of enabling
- *              #MBEDTLS_CHECK_PARAMS in the first place, so is discouraged.
- *
- * \param cond  The expression that should evaluate to true, but doesn't.
- */
-//#define MBEDTLS_PARAM_FAILED( cond )               assert( cond )
-
 /* PSA options */
 /**
  * Use HMAC_DRBG with the specified hash algorithm for HMAC_DRBG for the
@@ -3486,27 +3138,10 @@
  */
 //#define MBEDTLS_SSL_CID_OUT_LEN_MAX 32
 
-/** \def MBEDTLS_SSL_CID_PADDING_GRANULARITY
+/** \def MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY
  *
  * This option controls the use of record plaintext padding
- * when using the Connection ID extension in DTLS 1.2.
- *
- * The padding will always be chosen so that the length of the
- * padded plaintext is a multiple of the value of this option.
- *
- * Note: A value of \c 1 means that no padding will be used
- *       for outgoing records.
- *
- * Note: On systems lacking division instructions,
- *       a power of two should be preferred.
- *
- */
-//#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16
-
-/** \def MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY
- *
- * This option controls the use of record plaintext padding
- * in TLS 1.3.
+ * in TLS 1.3 and when using the Connection ID extension in DTLS 1.2.
  *
  * The padding will always be chosen so that the length of the
  * padded plaintext is a multiple of the value of this option.
@@ -3517,7 +3152,7 @@
  * Note: On systems lacking division instructions,
  *       a power of two should be preferred.
  */
-//#define MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY 1
+//#define MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY 16
 
 /** \def MBEDTLS_SSL_OUT_CONTENT_LEN
  *
@@ -3559,6 +3194,17 @@
 //#define MBEDTLS_PSK_MAX_LEN               32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */
 //#define MBEDTLS_SSL_COOKIE_TIMEOUT        60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
 
+/** \def MBEDTLS_TLS_EXT_CID
+ *
+ * At the time of writing, the CID extension has not been assigned its
+ * final value. Set this configuration option to make Mbed TLS use a
+ * different value.
+ *
+ * A future minor revision of Mbed TLS may change the default value of
+ * this option to match evolving standards and usage.
+ */
+//#define MBEDTLS_TLS_EXT_CID                        254
+
 /**
  * Complete list of ciphersuites to use, in order of preference.
  *
@@ -3578,23 +3224,6 @@
 //#define MBEDTLS_X509_MAX_FILE_PATH_LEN     512 /**< Maximum length of a path/filename string in bytes including the null terminator character ('\0'). */
 
 /**
- * Allow SHA-1 in the default TLS configuration for TLS 1.2 handshake
- * signature and ciphersuite selection. Without this build-time option, SHA-1
- * support must be activated explicitly through mbedtls_ssl_conf_sig_hashes.
- * The use of SHA-1 in TLS <= 1.1 and in HMAC-SHA-1 is always allowed by
- * default. At the time of writing, there is no practical attack on the use
- * of SHA-1 in handshake signatures, hence this option is turned on by default
- * to preserve compatibility with existing peers, but the general
- * warning applies nonetheless:
- *
- * \warning   SHA-1 is considered a weak message digest and its use constitutes
- *            a security risk. If possible, we recommend avoiding dependencies
- *            on it, and considering stronger message digests instead.
- *
- */
-#define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE
-
-/**
  * Uncomment the macro to let mbed TLS use your alternate implementation of
  * mbedtls_platform_zeroize(). This replaces the default implementation in
  * platform_util.c.
@@ -3643,20 +3272,3 @@
 //#define MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED
 
 /* \} name SECTION: Customisation configuration options */
-
-/* Target and application specific configurations
- *
- * Allow user to override any previous default.
- *
- */
-#if defined(MBEDTLS_USER_CONFIG_FILE)
-#include MBEDTLS_USER_CONFIG_FILE
-#endif
-
-#if defined(MBEDTLS_PSA_CRYPTO_CONFIG)
-#include "mbedtls/config_psa.h"
-#endif
-
-#include "mbedtls/check_config.h"
-
-#endif /* MBEDTLS_CONFIG_H */
diff --git a/include/mbedtls/md.h b/include/mbedtls/md.h
index fbc3b47..fa2b152 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -24,19 +24,20 @@
 
 #ifndef MBEDTLS_MD_H
 #define MBEDTLS_MD_H
+#include "mbedtls/private_access.h"
 
 #include <stddef.h>
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
-#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE                -0x5080  /**< The selected feature is not available. */
-#define MBEDTLS_ERR_MD_BAD_INPUT_DATA                     -0x5100  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_MD_ALLOC_FAILED                       -0x5180  /**< Failed to allocate memory. */
-#define MBEDTLS_ERR_MD_FILE_IO_ERROR                      -0x5200  /**< Opening or reading of file failed. */
+/** The selected feature is not available. */
+#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE                -0x5080
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_MD_BAD_INPUT_DATA                     -0x5100
+/** Failed to allocate memory. */
+#define MBEDTLS_ERR_MD_ALLOC_FAILED                       -0x5180
+/** Opening or reading of file failed. */
+#define MBEDTLS_ERR_MD_FILE_IO_ERROR                      -0x5200
 
 #ifdef __cplusplus
 extern "C" {
@@ -45,15 +46,13 @@
 /**
  * \brief     Supported message digests.
  *
- * \warning   MD2, MD4, MD5 and SHA-1 are considered weak message digests and
+ * \warning   MD5 and SHA-1 are considered weak message digests and
  *            their use constitutes a security risk. We recommend considering
  *            stronger message digests instead.
  *
  */
 typedef enum {
     MBEDTLS_MD_NONE=0,    /**< None. */
-    MBEDTLS_MD_MD2,       /**< The MD2 message digest. */
-    MBEDTLS_MD_MD4,       /**< The MD4 message digest. */
     MBEDTLS_MD_MD5,       /**< The MD5 message digest. */
     MBEDTLS_MD_SHA1,      /**< The SHA-1 message digest. */
     MBEDTLS_MD_SHA224,    /**< The SHA-224 message digest. */
@@ -93,13 +92,13 @@
 typedef struct mbedtls_md_context_t
 {
     /** Information about the associated message digest. */
-    const mbedtls_md_info_t *md_info;
+    const mbedtls_md_info_t *MBEDTLS_PRIVATE(md_info);
 
     /** The digest-specific context. */
-    void *md_ctx;
+    void *MBEDTLS_PRIVATE(md_ctx);
 
     /** The HMAC part of the context. */
-    void *hmac_ctx;
+    void *MBEDTLS_PRIVATE(hmac_ctx);
 } mbedtls_md_context_t;
 
 /**
diff --git a/include/mbedtls/md2.h b/include/mbedtls/md2.h
deleted file mode 100644
index 950afa2..0000000
--- a/include/mbedtls/md2.h
+++ /dev/null
@@ -1,203 +0,0 @@
-/**
- * \file md2.h
- *
- * \brief MD2 message digest algorithm (hash function)
- *
- * \warning MD2 is considered a weak message digest and its use constitutes a
- *          security risk. We recommend considering stronger message digests
- *          instead.
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- *
- */
-#ifndef MBEDTLS_MD2_H
-#define MBEDTLS_MD2_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_MD2_ALT)
-// Regular implementation
-//
-
-/**
- * \brief          MD2 context structure
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-typedef struct mbedtls_md2_context
-{
-    unsigned char cksum[16];    /*!< checksum of the data block */
-    unsigned char state[48];    /*!< intermediate digest state  */
-    unsigned char buffer[16];   /*!< data block being processed */
-    size_t left;                /*!< amount of data in buffer   */
-}
-mbedtls_md2_context;
-
-#else  /* MBEDTLS_MD2_ALT */
-#include "md2_alt.h"
-#endif /* MBEDTLS_MD2_ALT */
-
-/**
- * \brief          Initialize MD2 context
- *
- * \param ctx      MD2 context to be initialized
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-void mbedtls_md2_init( mbedtls_md2_context *ctx );
-
-/**
- * \brief          Clear MD2 context
- *
- * \param ctx      MD2 context to be cleared
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-void mbedtls_md2_free( mbedtls_md2_context *ctx );
-
-/**
- * \brief          Clone (the state of) an MD2 context
- *
- * \param dst      The destination context
- * \param src      The context to be cloned
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-void mbedtls_md2_clone( mbedtls_md2_context *dst,
-                        const mbedtls_md2_context *src );
-
-/**
- * \brief          MD2 context setup
- *
- * \param ctx      context to be initialized
- *
- * \return         0 if successful
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md2_starts_ret( mbedtls_md2_context *ctx );
-
-/**
- * \brief          MD2 process buffer
- *
- * \param ctx      MD2 context
- * \param input    buffer holding the data
- * \param ilen     length of the input data
- *
- * \return         0 if successful
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md2_update_ret( mbedtls_md2_context *ctx,
-                            const unsigned char *input,
-                            size_t ilen );
-
-/**
- * \brief          MD2 final digest
- *
- * \param ctx      MD2 context
- * \param output   MD2 checksum result
- *
- * \return         0 if successful
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md2_finish_ret( mbedtls_md2_context *ctx,
-                            unsigned char output[16] );
-
-/**
- * \brief          MD2 process data block (internal use only)
- *
- * \param ctx      MD2 context
- *
- * \return         0 if successful
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_internal_md2_process( mbedtls_md2_context *ctx );
-
-/**
- * \brief          Output = MD2( input buffer )
- *
- * \param input    buffer holding the data
- * \param ilen     length of the input data
- * \param output   MD2 checksum result
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md2_ret( const unsigned char *input,
-                     size_t ilen,
-                     unsigned char output[16] );
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/**
- * \brief          Checkup routine
- *
- * \return         0 if successful, or 1 if the test failed
- *
- * \warning        MD2 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md2_self_test( int verbose );
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* mbedtls_md2.h */
diff --git a/include/mbedtls/md4.h b/include/mbedtls/md4.h
deleted file mode 100644
index f9e3987..0000000
--- a/include/mbedtls/md4.h
+++ /dev/null
@@ -1,206 +0,0 @@
-/**
- * \file md4.h
- *
- * \brief MD4 message digest algorithm (hash function)
- *
- * \warning MD4 is considered a weak message digest and its use constitutes a
- *          security risk. We recommend considering stronger message digests
- *          instead.
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- *
- */
-#ifndef MBEDTLS_MD4_H
-#define MBEDTLS_MD4_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_MD4_ALT)
-// Regular implementation
-//
-
-/**
- * \brief          MD4 context structure
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-typedef struct mbedtls_md4_context
-{
-    uint32_t total[2];          /*!< number of bytes processed  */
-    uint32_t state[4];          /*!< intermediate digest state  */
-    unsigned char buffer[64];   /*!< data block being processed */
-}
-mbedtls_md4_context;
-
-#else  /* MBEDTLS_MD4_ALT */
-#include "md4_alt.h"
-#endif /* MBEDTLS_MD4_ALT */
-
-/**
- * \brief          Initialize MD4 context
- *
- * \param ctx      MD4 context to be initialized
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-void mbedtls_md4_init( mbedtls_md4_context *ctx );
-
-/**
- * \brief          Clear MD4 context
- *
- * \param ctx      MD4 context to be cleared
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-void mbedtls_md4_free( mbedtls_md4_context *ctx );
-
-/**
- * \brief          Clone (the state of) an MD4 context
- *
- * \param dst      The destination context
- * \param src      The context to be cloned
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-void mbedtls_md4_clone( mbedtls_md4_context *dst,
-                        const mbedtls_md4_context *src );
-
-/**
- * \brief          MD4 context setup
- *
- * \param ctx      context to be initialized
- *
- * \return         0 if successful
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- */
-int mbedtls_md4_starts_ret( mbedtls_md4_context *ctx );
-
-/**
- * \brief          MD4 process buffer
- *
- * \param ctx      MD4 context
- * \param input    buffer holding the data
- * \param ilen     length of the input data
- *
- * \return         0 if successful
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md4_update_ret( mbedtls_md4_context *ctx,
-                            const unsigned char *input,
-                            size_t ilen );
-
-/**
- * \brief          MD4 final digest
- *
- * \param ctx      MD4 context
- * \param output   MD4 checksum result
- *
- * \return         0 if successful
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md4_finish_ret( mbedtls_md4_context *ctx,
-                            unsigned char output[16] );
-
-/**
- * \brief          MD4 process data block (internal use only)
- *
- * \param ctx      MD4 context
- * \param data     buffer holding one block of data
- *
- * \return         0 if successful
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_internal_md4_process( mbedtls_md4_context *ctx,
-                                  const unsigned char data[64] );
-
-/**
- * \brief          Output = MD4( input buffer )
- *
- * \param input    buffer holding the data
- * \param ilen     length of the input data
- * \param output   MD4 checksum result
- *
- * \return         0 if successful
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md4_ret( const unsigned char *input,
-                     size_t ilen,
-                     unsigned char output[16] );
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/**
- * \brief          Checkup routine
- *
- * \return         0 if successful, or 1 if the test failed
- *
- * \warning        MD4 is considered a weak message digest and its use
- *                 constitutes a security risk. We recommend considering
- *                 stronger message digests instead.
- *
- */
-int mbedtls_md4_self_test( int verbose );
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* mbedtls_md4.h */
diff --git a/include/mbedtls/md5.h b/include/mbedtls/md5.h
index 71a41dc..e7befc3 100644
--- a/include/mbedtls/md5.h
+++ b/include/mbedtls/md5.h
@@ -25,12 +25,9 @@
  */
 #ifndef MBEDTLS_MD5_H
 #define MBEDTLS_MD5_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -53,9 +50,9 @@
  */
 typedef struct mbedtls_md5_context
 {
-    uint32_t total[2];          /*!< number of bytes processed  */
-    uint32_t state[4];          /*!< intermediate digest state  */
-    unsigned char buffer[64];   /*!< data block being processed */
+    uint32_t MBEDTLS_PRIVATE(total)[2];          /*!< number of bytes processed  */
+    uint32_t MBEDTLS_PRIVATE(state)[4];          /*!< intermediate digest state  */
+    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< data block being processed */
 }
 mbedtls_md5_context;
 
@@ -113,7 +110,7 @@
  *                 stronger message digests instead.
  *
  */
-int mbedtls_md5_starts_ret( mbedtls_md5_context *ctx );
+int mbedtls_md5_starts( mbedtls_md5_context *ctx );
 
 /**
  * \brief          MD5 process buffer
@@ -129,9 +126,9 @@
  *                 stronger message digests instead.
  *
  */
-int mbedtls_md5_update_ret( mbedtls_md5_context *ctx,
-                            const unsigned char *input,
-                            size_t ilen );
+int mbedtls_md5_update( mbedtls_md5_context *ctx,
+                        const unsigned char *input,
+                        size_t ilen );
 
 /**
  * \brief          MD5 final digest
@@ -146,8 +143,8 @@
  *                 stronger message digests instead.
  *
  */
-int mbedtls_md5_finish_ret( mbedtls_md5_context *ctx,
-                            unsigned char output[16] );
+int mbedtls_md5_finish( mbedtls_md5_context *ctx,
+                        unsigned char output[16] );
 
 /**
  * \brief          MD5 process data block (internal use only)
@@ -179,9 +176,9 @@
  *                 stronger message digests instead.
  *
  */
-int mbedtls_md5_ret( const unsigned char *input,
-                     size_t ilen,
-                     unsigned char output[16] );
+int mbedtls_md5( const unsigned char *input,
+                 size_t ilen,
+                 unsigned char output[16] );
 
 #if defined(MBEDTLS_SELF_TEST)
 
diff --git a/include/mbedtls/memory_buffer_alloc.h b/include/mbedtls/memory_buffer_alloc.h
index 2339772..d4737f5 100644
--- a/include/mbedtls/memory_buffer_alloc.h
+++ b/include/mbedtls/memory_buffer_alloc.h
@@ -22,11 +22,7 @@
 #ifndef MBEDTLS_MEMORY_BUFFER_ALLOC_H
 #define MBEDTLS_MEMORY_BUFFER_ALLOC_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 
@@ -34,7 +30,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
diff --git a/include/mbedtls/net_sockets.h b/include/mbedtls/net_sockets.h
index 319f4be..c8214a2 100644
--- a/include/mbedtls/net_sockets.h
+++ b/include/mbedtls/net_sockets.h
@@ -37,31 +37,41 @@
  */
 #ifndef MBEDTLS_NET_SOCKETS_H
 #define MBEDTLS_NET_SOCKETS_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ssl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
-#define MBEDTLS_ERR_NET_SOCKET_FAILED                     -0x0042  /**< Failed to open a socket. */
-#define MBEDTLS_ERR_NET_CONNECT_FAILED                    -0x0044  /**< The connection to the given server / port failed. */
-#define MBEDTLS_ERR_NET_BIND_FAILED                       -0x0046  /**< Binding of the socket failed. */
-#define MBEDTLS_ERR_NET_LISTEN_FAILED                     -0x0048  /**< Could not listen on the socket. */
-#define MBEDTLS_ERR_NET_ACCEPT_FAILED                     -0x004A  /**< Could not accept the incoming connection. */
-#define MBEDTLS_ERR_NET_RECV_FAILED                       -0x004C  /**< Reading information from the socket failed. */
-#define MBEDTLS_ERR_NET_SEND_FAILED                       -0x004E  /**< Sending information through the socket failed. */
-#define MBEDTLS_ERR_NET_CONN_RESET                        -0x0050  /**< Connection was reset by peer. */
-#define MBEDTLS_ERR_NET_UNKNOWN_HOST                      -0x0052  /**< Failed to get an IP address for the given hostname. */
-#define MBEDTLS_ERR_NET_BUFFER_TOO_SMALL                  -0x0043  /**< Buffer is too small to hold the data. */
-#define MBEDTLS_ERR_NET_INVALID_CONTEXT                   -0x0045  /**< The context is invalid, eg because it was free()ed. */
-#define MBEDTLS_ERR_NET_POLL_FAILED                       -0x0047  /**< Polling the net context failed. */
-#define MBEDTLS_ERR_NET_BAD_INPUT_DATA                    -0x0049  /**< Input invalid. */
+/** Failed to open a socket. */
+#define MBEDTLS_ERR_NET_SOCKET_FAILED                     -0x0042
+/** The connection to the given server / port failed. */
+#define MBEDTLS_ERR_NET_CONNECT_FAILED                    -0x0044
+/** Binding of the socket failed. */
+#define MBEDTLS_ERR_NET_BIND_FAILED                       -0x0046
+/** Could not listen on the socket. */
+#define MBEDTLS_ERR_NET_LISTEN_FAILED                     -0x0048
+/** Could not accept the incoming connection. */
+#define MBEDTLS_ERR_NET_ACCEPT_FAILED                     -0x004A
+/** Reading information from the socket failed. */
+#define MBEDTLS_ERR_NET_RECV_FAILED                       -0x004C
+/** Sending information through the socket failed. */
+#define MBEDTLS_ERR_NET_SEND_FAILED                       -0x004E
+/** Connection was reset by peer. */
+#define MBEDTLS_ERR_NET_CONN_RESET                        -0x0050
+/** Failed to get an IP address for the given hostname. */
+#define MBEDTLS_ERR_NET_UNKNOWN_HOST                      -0x0052
+/** Buffer is too small to hold the data. */
+#define MBEDTLS_ERR_NET_BUFFER_TOO_SMALL                  -0x0043
+/** The context is invalid, eg because it was free()ed. */
+#define MBEDTLS_ERR_NET_INVALID_CONTEXT                   -0x0045
+/** Polling the net context failed. */
+#define MBEDTLS_ERR_NET_POLL_FAILED                       -0x0047
+/** Input invalid. */
+#define MBEDTLS_ERR_NET_BAD_INPUT_DATA                    -0x0049
 
 #define MBEDTLS_NET_LISTEN_BACKLOG         10 /**< The backlog that listen() should use. */
 
@@ -84,7 +94,7 @@
  */
 typedef struct mbedtls_net_context
 {
-    int fd;             /**< The underlying file descriptor                 */
+    int MBEDTLS_PRIVATE(fd);             /**< The underlying file descriptor                 */
 }
 mbedtls_net_context;
 
diff --git a/include/mbedtls/nist_kw.h b/include/mbedtls/nist_kw.h
index 7f3e64a..bd6c658 100644
--- a/include/mbedtls/nist_kw.h
+++ b/include/mbedtls/nist_kw.h
@@ -34,12 +34,9 @@
 
 #ifndef MBEDTLS_NIST_KW_H
 #define MBEDTLS_NIST_KW_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/cipher.h"
 
@@ -65,7 +62,7 @@
  *           Don't make any assumptions on this context!
  */
 typedef struct {
-    mbedtls_cipher_context_t cipher_ctx;    /*!< The cipher context used. */
+    mbedtls_cipher_context_t MBEDTLS_PRIVATE(cipher_ctx);    /*!< The cipher context used. */
 } mbedtls_nist_kw_context;
 
 #else  /* MBEDTLS_NIST_key wrapping_ALT */
diff --git a/include/mbedtls/oid.h b/include/mbedtls/oid.h
index 739a42f..836e455 100644
--- a/include/mbedtls/oid.h
+++ b/include/mbedtls/oid.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_OID_H
 #define MBEDTLS_OID_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/asn1.h"
 #include "mbedtls/pk.h"
@@ -41,8 +38,10 @@
 #include "mbedtls/md.h"
 #endif
 
-#define MBEDTLS_ERR_OID_NOT_FOUND                         -0x002E  /**< OID is not found. */
-#define MBEDTLS_ERR_OID_BUF_TOO_SMALL                     -0x000B  /**< output buffer is too small */
+/** OID is not found. */
+#define MBEDTLS_ERR_OID_NOT_FOUND                         -0x002E
+/** output buffer is too small */
+#define MBEDTLS_ERR_OID_BUF_TOO_SMALL                     -0x000B
 
 /* This is for the benefit of X.509, but defined here in order to avoid
  * having a "backwards" include of x.509.h here */
@@ -230,8 +229,6 @@
  * PKCS#1 OIDs
  */
 #define MBEDTLS_OID_PKCS1_RSA           MBEDTLS_OID_PKCS1 "\x01" /**< rsaEncryption OBJECT IDENTIFIER ::= { pkcs-1 1 } */
-#define MBEDTLS_OID_PKCS1_MD2           MBEDTLS_OID_PKCS1 "\x02" /**< md2WithRSAEncryption ::= { pkcs-1 2 } */
-#define MBEDTLS_OID_PKCS1_MD4           MBEDTLS_OID_PKCS1 "\x03" /**< md4WithRSAEncryption ::= { pkcs-1 3 } */
 #define MBEDTLS_OID_PKCS1_MD5           MBEDTLS_OID_PKCS1 "\x04" /**< md5WithRSAEncryption ::= { pkcs-1 4 } */
 #define MBEDTLS_OID_PKCS1_SHA1          MBEDTLS_OID_PKCS1 "\x05" /**< sha1WithRSAEncryption ::= { pkcs-1 5 } */
 #define MBEDTLS_OID_PKCS1_SHA224        MBEDTLS_OID_PKCS1 "\x0e" /**< sha224WithRSAEncryption ::= { pkcs-1 14 } */
@@ -250,8 +247,6 @@
 /*
  * Digest algorithms
  */
-#define MBEDTLS_OID_DIGEST_ALG_MD2              MBEDTLS_OID_RSA_COMPANY "\x02\x02" /**< id-mbedtls_md2 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 2 } */
-#define MBEDTLS_OID_DIGEST_ALG_MD4              MBEDTLS_OID_RSA_COMPANY "\x02\x04" /**< id-mbedtls_md4 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 4 } */
 #define MBEDTLS_OID_DIGEST_ALG_MD5              MBEDTLS_OID_RSA_COMPANY "\x02\x05" /**< id-mbedtls_md5 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 5 } */
 #define MBEDTLS_OID_DIGEST_ALG_SHA1             MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_OIW_SECSIG_SHA1 /**< id-mbedtls_sha1 OBJECT IDENTIFIER ::= { iso(1) identified-organization(3) oiw(14) secsig(3) algorithms(2) 26 } */
 #define MBEDTLS_OID_DIGEST_ALG_SHA224           MBEDTLS_OID_NIST_ALG "\x02\x04" /**< id-sha224 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 4 } */
@@ -302,8 +297,6 @@
 /*
  * PKCS#5 PBES1 algorithms
  */
-#define MBEDTLS_OID_PKCS5_PBE_MD2_DES_CBC       MBEDTLS_OID_PKCS5 "\x01" /**< pbeWithMD2AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 1} */
-#define MBEDTLS_OID_PKCS5_PBE_MD2_RC2_CBC       MBEDTLS_OID_PKCS5 "\x04" /**< pbeWithMD2AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 4} */
 #define MBEDTLS_OID_PKCS5_PBE_MD5_DES_CBC       MBEDTLS_OID_PKCS5 "\x03" /**< pbeWithMD5AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 3} */
 #define MBEDTLS_OID_PKCS5_PBE_MD5_RC2_CBC       MBEDTLS_OID_PKCS5 "\x06" /**< pbeWithMD5AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 6} */
 #define MBEDTLS_OID_PKCS5_PBE_SHA1_DES_CBC      MBEDTLS_OID_PKCS5 "\x0a" /**< pbeWithSHA1AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 10} */
@@ -319,8 +312,6 @@
  */
 #define MBEDTLS_OID_PKCS12_PBE                      MBEDTLS_OID_PKCS12 "\x01" /**< pkcs-12PbeIds OBJECT IDENTIFIER ::= {pkcs-12 1} */
 
-#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128         MBEDTLS_OID_PKCS12_PBE "\x01" /**< pbeWithSHAAnd128BitRC4 OBJECT IDENTIFIER ::= {pkcs-12PbeIds 1} */
-#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_40          MBEDTLS_OID_PKCS12_PBE "\x02" /**< pbeWithSHAAnd40BitRC4 OBJECT IDENTIFIER ::= {pkcs-12PbeIds 2} */
 #define MBEDTLS_OID_PKCS12_PBE_SHA1_DES3_EDE_CBC    MBEDTLS_OID_PKCS12_PBE "\x03" /**< pbeWithSHAAnd3-KeyTripleDES-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 3} */
 #define MBEDTLS_OID_PKCS12_PBE_SHA1_DES2_EDE_CBC    MBEDTLS_OID_PKCS12_PBE "\x04" /**< pbeWithSHAAnd2-KeyTripleDES-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 4} */
 #define MBEDTLS_OID_PKCS12_PBE_SHA1_RC2_128_CBC     MBEDTLS_OID_PKCS12_PBE "\x05" /**< pbeWithSHAAnd128BitRC2-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 5} */
@@ -440,11 +431,11 @@
  */
 typedef struct mbedtls_oid_descriptor_t
 {
-    const char *asn1;               /*!< OID ASN.1 representation       */
-    size_t asn1_len;                /*!< length of asn1                 */
+    const char *MBEDTLS_PRIVATE(asn1);               /*!< OID ASN.1 representation       */
+    size_t MBEDTLS_PRIVATE(asn1_len);                /*!< length of asn1                 */
 #if !defined(MBEDTLS_X509_REMOVE_INFO)
-    const char *name;               /*!< official name (e.g. from RFC)  */
-    const char *description;        /*!< human friendly description     */
+    const char *MBEDTLS_PRIVATE(name);               /*!< official name (e.g. from RFC)  */
+    const char *MBEDTLS_PRIVATE(description);        /*!< human friendly description     */
 #endif
 } mbedtls_oid_descriptor_t;
 
diff --git a/include/mbedtls/pem.h b/include/mbedtls/pem.h
index 4769bec..baceb07 100644
--- a/include/mbedtls/pem.h
+++ b/include/mbedtls/pem.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_PEM_H
 #define MBEDTLS_PEM_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 
@@ -36,15 +33,24 @@
  * PEM data.
  * \{
  */
-#define MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT          -0x1080  /**< No PEM header or footer found. */
-#define MBEDTLS_ERR_PEM_INVALID_DATA                      -0x1100  /**< PEM string is not as expected. */
-#define MBEDTLS_ERR_PEM_ALLOC_FAILED                      -0x1180  /**< Failed to allocate memory. */
-#define MBEDTLS_ERR_PEM_INVALID_ENC_IV                    -0x1200  /**< RSA IV is not in hex-format. */
-#define MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG                   -0x1280  /**< Unsupported key encryption algorithm. */
-#define MBEDTLS_ERR_PEM_PASSWORD_REQUIRED                 -0x1300  /**< Private key password can't be empty. */
-#define MBEDTLS_ERR_PEM_PASSWORD_MISMATCH                 -0x1380  /**< Given private key password does not allow for correct decryption. */
-#define MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE               -0x1400  /**< Unavailable feature, e.g. hashing/encryption combination. */
-#define MBEDTLS_ERR_PEM_BAD_INPUT_DATA                    -0x1480  /**< Bad input parameters to function. */
+/** No PEM header or footer found. */
+#define MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT          -0x1080
+/** PEM string is not as expected. */
+#define MBEDTLS_ERR_PEM_INVALID_DATA                      -0x1100
+/** Failed to allocate memory. */
+#define MBEDTLS_ERR_PEM_ALLOC_FAILED                      -0x1180
+/** RSA IV is not in hex-format. */
+#define MBEDTLS_ERR_PEM_INVALID_ENC_IV                    -0x1200
+/** Unsupported key encryption algorithm. */
+#define MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG                   -0x1280
+/** Private key password can't be empty. */
+#define MBEDTLS_ERR_PEM_PASSWORD_REQUIRED                 -0x1300
+/** Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PEM_PASSWORD_MISMATCH                 -0x1380
+/** Unavailable feature, e.g. hashing/encryption combination. */
+#define MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE               -0x1400
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_PEM_BAD_INPUT_DATA                    -0x1480
 /* \} name */
 
 #ifdef __cplusplus
@@ -57,9 +63,9 @@
  */
 typedef struct mbedtls_pem_context
 {
-    unsigned char *buf;     /*!< buffer for decoded data             */
-    size_t buflen;          /*!< length of the buffer                */
-    unsigned char *info;    /*!< buffer for extra header information */
+    unsigned char *MBEDTLS_PRIVATE(buf);     /*!< buffer for decoded data             */
+    size_t MBEDTLS_PRIVATE(buflen);          /*!< length of the buffer                */
+    unsigned char *MBEDTLS_PRIVATE(info);    /*!< buffer for extra header information */
 }
 mbedtls_pem_context;
 
diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index 25f02ff..ded5222 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -22,12 +22,9 @@
 
 #ifndef MBEDTLS_PK_H
 #define MBEDTLS_PK_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/md.h"
 
@@ -52,20 +49,36 @@
 #define inline __inline
 #endif
 
-#define MBEDTLS_ERR_PK_ALLOC_FAILED        -0x3F80  /**< Memory allocation failed. */
-#define MBEDTLS_ERR_PK_TYPE_MISMATCH       -0x3F00  /**< Type mismatch, eg attempt to encrypt with an ECDSA key */
-#define MBEDTLS_ERR_PK_BAD_INPUT_DATA      -0x3E80  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_PK_FILE_IO_ERROR       -0x3E00  /**< Read/write of file failed. */
-#define MBEDTLS_ERR_PK_KEY_INVALID_VERSION -0x3D80  /**< Unsupported key version */
-#define MBEDTLS_ERR_PK_KEY_INVALID_FORMAT  -0x3D00  /**< Invalid key tag or value. */
-#define MBEDTLS_ERR_PK_UNKNOWN_PK_ALG      -0x3C80  /**< Key algorithm is unsupported (only RSA and EC are supported). */
-#define MBEDTLS_ERR_PK_PASSWORD_REQUIRED   -0x3C00  /**< Private key password can't be empty. */
-#define MBEDTLS_ERR_PK_PASSWORD_MISMATCH   -0x3B80  /**< Given private key password does not allow for correct decryption. */
-#define MBEDTLS_ERR_PK_INVALID_PUBKEY      -0x3B00  /**< The pubkey tag or value is invalid (only RSA and EC are supported). */
-#define MBEDTLS_ERR_PK_INVALID_ALG         -0x3A80  /**< The algorithm tag or value is invalid. */
-#define MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE -0x3A00  /**< Elliptic curve is unsupported (only NIST curves are supported). */
-#define MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE -0x3980  /**< Unavailable feature, e.g. RSA disabled for RSA key. */
-#define MBEDTLS_ERR_PK_SIG_LEN_MISMATCH    -0x3900  /**< The buffer contains a valid signature followed by more data. */
+/** Memory allocation failed. */
+#define MBEDTLS_ERR_PK_ALLOC_FAILED        -0x3F80
+/** Type mismatch, eg attempt to encrypt with an ECDSA key */
+#define MBEDTLS_ERR_PK_TYPE_MISMATCH       -0x3F00
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_PK_BAD_INPUT_DATA      -0x3E80
+/** Read/write of file failed. */
+#define MBEDTLS_ERR_PK_FILE_IO_ERROR       -0x3E00
+/** Unsupported key version */
+#define MBEDTLS_ERR_PK_KEY_INVALID_VERSION -0x3D80
+/** Invalid key tag or value. */
+#define MBEDTLS_ERR_PK_KEY_INVALID_FORMAT  -0x3D00
+/** Key algorithm is unsupported (only RSA and EC are supported). */
+#define MBEDTLS_ERR_PK_UNKNOWN_PK_ALG      -0x3C80
+/** Private key password can't be empty. */
+#define MBEDTLS_ERR_PK_PASSWORD_REQUIRED   -0x3C00
+/** Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PK_PASSWORD_MISMATCH   -0x3B80
+/** The pubkey tag or value is invalid (only RSA and EC are supported). */
+#define MBEDTLS_ERR_PK_INVALID_PUBKEY      -0x3B00
+/** The algorithm tag or value is invalid. */
+#define MBEDTLS_ERR_PK_INVALID_ALG         -0x3A80
+/** Elliptic curve is unsupported (only NIST curves are supported). */
+#define MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE -0x3A00
+/** Unavailable feature, e.g. RSA disabled for RSA key. */
+#define MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE -0x3980
+/** The buffer contains a valid signature followed by more data. */
+#define MBEDTLS_ERR_PK_SIG_LEN_MISMATCH    -0x3900
+/** The output buffer is too small. */
+#define MBEDTLS_ERR_PK_BUFFER_TOO_SMALL    -0x3880
 
 #ifdef __cplusplus
 extern "C" {
@@ -91,8 +104,8 @@
  */
 typedef struct mbedtls_pk_rsassa_pss_options
 {
-    mbedtls_md_type_t mgf1_hash_id;
-    int expected_salt_len;
+    mbedtls_md_type_t MBEDTLS_PRIVATE(mgf1_hash_id);
+    int MBEDTLS_PRIVATE(expected_salt_len);
 
 } mbedtls_pk_rsassa_pss_options;
 
@@ -163,9 +176,9 @@
  */
 typedef struct mbedtls_pk_debug_item
 {
-    mbedtls_pk_debug_type type;
-    const char *name;
-    void *value;
+    mbedtls_pk_debug_type MBEDTLS_PRIVATE(type);
+    const char *MBEDTLS_PRIVATE(name);
+    void *MBEDTLS_PRIVATE(value);
 } mbedtls_pk_debug_item;
 
 /** Maximum number of item send for debugging, plus 1 */
@@ -181,8 +194,8 @@
  */
 typedef struct mbedtls_pk_context
 {
-    const mbedtls_pk_info_t *   pk_info; /**< Public key information         */
-    void *                      pk_ctx;  /**< Underlying public key context  */
+    const mbedtls_pk_info_t *   MBEDTLS_PRIVATE(pk_info); /**< Public key information         */
+    void *                      MBEDTLS_PRIVATE(pk_ctx);  /**< Underlying public key context  */
 } mbedtls_pk_context;
 
 #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
@@ -191,8 +204,8 @@
  */
 typedef struct
 {
-    const mbedtls_pk_info_t *   pk_info; /**< Public key information         */
-    void *                      rs_ctx;  /**< Underlying restart context     */
+    const mbedtls_pk_info_t *   MBEDTLS_PRIVATE(pk_info); /**< Public key information         */
+    void *                      MBEDTLS_PRIVATE(rs_ctx);  /**< Underlying restart context     */
 } mbedtls_pk_restart_ctx;
 #else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
 /* Now we can declare functions that take a pointer to that */
@@ -208,7 +221,7 @@
  */
 static inline mbedtls_rsa_context *mbedtls_pk_rsa( const mbedtls_pk_context pk )
 {
-    return( (mbedtls_rsa_context *) (pk).pk_ctx );
+    return( (mbedtls_rsa_context *) (pk).MBEDTLS_PRIVATE(pk_ctx) );
 }
 #endif /* MBEDTLS_RSA_C */
 
@@ -221,7 +234,7 @@
  */
 static inline mbedtls_ecp_keypair *mbedtls_pk_ec( const mbedtls_pk_context pk )
 {
-    return( (mbedtls_ecp_keypair *) (pk).pk_ctx );
+    return( (mbedtls_ecp_keypair *) (pk).MBEDTLS_PRIVATE(pk_ctx) );
 }
 #endif /* MBEDTLS_ECP_C */
 
@@ -398,9 +411,17 @@
  * \brief           Verify signature (including padding if relevant).
  *
  * \param ctx       The PK context to use. It must have been set up.
- * \param md_alg    Hash algorithm used (see notes)
+ * \param md_alg    Hash algorithm used.
+ *                  This can be #MBEDTLS_MD_NONE if the signature algorithm
+ *                  does not rely on a hash algorithm (non-deterministic
+ *                  ECDSA, RSA PKCS#1 v1.5).
+ *                  For PKCS#1 v1.5, if \p md_alg is #MBEDTLS_MD_NONE, then
+ *                  \p hash is the DigestInfo structure used by RFC 8017
+ *                  &sect;9.2 steps 3&ndash;6. If \p md_alg is a valid hash
+ *                  algorithm then \p hash is the digest itself, and this
+ *                  function calculates the DigestInfo encoding internally.
  * \param hash      Hash of the message to sign
- * \param hash_len  Hash length or 0 (see notes)
+ * \param hash_len  Hash length
  * \param sig       Signature to verify
  * \param sig_len   Signature length
  *
@@ -412,11 +433,6 @@
  * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
  *                  Use \c mbedtls_pk_verify_ext( MBEDTLS_PK_RSASSA_PSS, ... )
  *                  to verify RSASSA_PSS signatures.
- *
- * \note            If hash_len is 0, then the length associated with md_alg
- *                  is used instead, or an error returned if it is invalid.
- *
- * \note            md_alg may be MBEDTLS_MD_NONE, only if hash_len != 0
  */
 int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
                const unsigned char *hash, size_t hash_len,
@@ -489,15 +505,16 @@
  *                  with a private key.
  * \param md_alg    Hash algorithm used (see notes)
  * \param hash      Hash of the message to sign
- * \param hash_len  Hash length or 0 (see notes)
+ * \param hash_len  Hash length
  * \param sig       Place to write the signature.
  *                  It must have enough room for the signature.
  *                  #MBEDTLS_PK_SIGNATURE_MAX_SIZE is always enough.
  *                  You may use a smaller buffer if it is large enough
  *                  given the key type.
+ * \param sig_size  The size of the \p sig buffer in bytes.
  * \param sig_len   On successful return,
  *                  the number of bytes written to \p sig.
- * \param f_rng     RNG function
+ * \param f_rng     RNG function, must not be \c NULL.
  * \param p_rng     RNG parameter
  *
  * \return          0 on success, or a specific error code.
@@ -506,15 +523,12 @@
  *                  There is no interface in the PK module to make RSASSA-PSS
  *                  signatures yet.
  *
- * \note            If hash_len is 0, then the length associated with md_alg
- *                  is used instead, or an error returned if it is invalid.
- *
  * \note            For RSA, md_alg may be MBEDTLS_MD_NONE if hash_len != 0.
  *                  For ECDSA, md_alg may never be MBEDTLS_MD_NONE.
  */
 int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
              const unsigned char *hash, size_t hash_len,
-             unsigned char *sig, size_t *sig_len,
+             unsigned char *sig, size_t sig_size, size_t *sig_len,
              int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
 
 /**
@@ -529,15 +543,16 @@
  *                  with a private key.
  * \param md_alg    Hash algorithm used (see notes for mbedtls_pk_sign())
  * \param hash      Hash of the message to sign
- * \param hash_len  Hash length or 0 (see notes for mbedtls_pk_sign())
+ * \param hash_len  Hash length
  * \param sig       Place to write the signature.
  *                  It must have enough room for the signature.
  *                  #MBEDTLS_PK_SIGNATURE_MAX_SIZE is always enough.
  *                  You may use a smaller buffer if it is large enough
  *                  given the key type.
+ * \param sig_size  The size of the \p sig buffer in bytes.
  * \param sig_len   On successful return,
  *                  the number of bytes written to \p sig.
- * \param f_rng     RNG function
+ * \param f_rng     RNG function, must not be \c NULL.
  * \param p_rng     RNG parameter
  * \param rs_ctx    Restart context (NULL to disable restart)
  *
@@ -548,7 +563,7 @@
 int mbedtls_pk_sign_restartable( mbedtls_pk_context *ctx,
              mbedtls_md_type_t md_alg,
              const unsigned char *hash, size_t hash_len,
-             unsigned char *sig, size_t *sig_len,
+             unsigned char *sig, size_t sig_size, size_t *sig_len,
              int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
              mbedtls_pk_restart_ctx *rs_ctx );
 
@@ -562,7 +577,7 @@
  * \param output    Decrypted output
  * \param olen      Decrypted message length
  * \param osize     Size of the output buffer
- * \param f_rng     RNG function
+ * \param f_rng     RNG function, must not be \c NULL.
  * \param p_rng     RNG parameter
  *
  * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
@@ -583,9 +598,11 @@
  * \param output    Encrypted output
  * \param olen      Encrypted output length
  * \param osize     Size of the output buffer
- * \param f_rng     RNG function
+ * \param f_rng     RNG function, must not be \c NULL.
  * \param p_rng     RNG parameter
  *
+ * \note            \p f_rng is used for padding generation.
+ *
  * \note            For RSA keys, the default padding type is PKCS#1 v1.5.
  *
  * \return          0 on success, or a specific error code.
@@ -600,6 +617,8 @@
  *
  * \param pub       Context holding a public key.
  * \param prv       Context holding a private (and public) key.
+ * \param f_rng     RNG function, must not be \c NULL.
+ * \param p_rng     RNG parameter
  *
  * \return          \c 0 on success (keys were checked and match each other).
  * \return          #MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE if the keys could not
@@ -607,7 +626,10 @@
  * \return          #MBEDTLS_ERR_PK_BAD_INPUT_DATA if a context is invalid.
  * \return          Another non-zero value if the keys do not match.
  */
-int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv );
+int mbedtls_pk_check_pair( const mbedtls_pk_context *pub,
+                           const mbedtls_pk_context *prv,
+                           int (*f_rng)(void *, unsigned char *, size_t),
+                           void *p_rng );
 
 /**
  * \brief           Export debug information
@@ -659,6 +681,8 @@
  *                  The empty password is not supported.
  * \param pwdlen    Size of the password in bytes.
  *                  Ignored if \p pwd is \c NULL.
+ * \param f_rng     RNG function, must not be \c NULL. Used for blinding.
+ * \param p_rng     RNG parameter
  *
  * \note            On entry, ctx must be empty, either freshly initialised
  *                  with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
@@ -669,8 +693,9 @@
  * \return          0 if successful, or a specific PK or PEM error code
  */
 int mbedtls_pk_parse_key( mbedtls_pk_context *ctx,
-                  const unsigned char *key, size_t keylen,
-                  const unsigned char *pwd, size_t pwdlen );
+              const unsigned char *key, size_t keylen,
+              const unsigned char *pwd, size_t pwdlen,
+              int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
 
 /** \ingroup pk_module */
 /**
@@ -710,6 +735,8 @@
  *                  Pass a null-terminated string if expecting an encrypted
  *                  key; a non-encrypted key will also be accepted.
  *                  The empty password is not supported.
+ * \param f_rng     RNG function, must not be \c NULL. Used for blinding.
+ * \param p_rng     RNG parameter
  *
  * \note            On entry, ctx must be empty, either freshly initialised
  *                  with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
@@ -720,7 +747,8 @@
  * \return          0 if successful, or a specific PK or PEM error code
  */
 int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
-                      const char *path, const char *password );
+                  const char *path, const char *password,
+                  int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
 
 /** \ingroup pk_module */
 /**
diff --git a/include/mbedtls/pkcs12.h b/include/mbedtls/pkcs12.h
index 4b8ce7e..cded903 100644
--- a/include/mbedtls/pkcs12.h
+++ b/include/mbedtls/pkcs12.h
@@ -22,11 +22,7 @@
 #ifndef MBEDTLS_PKCS12_H
 #define MBEDTLS_PKCS12_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/md.h"
 #include "mbedtls/cipher.h"
@@ -34,10 +30,14 @@
 
 #include <stddef.h>
 
-#define MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA                 -0x1F80  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE            -0x1F00  /**< Feature not available, e.g. unsupported encryption scheme. */
-#define MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT             -0x1E80  /**< PBE ASN.1 data not as expected. */
-#define MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH              -0x1E00  /**< Given private key password does not allow for correct decryption. */
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA                 -0x1F80
+/** Feature not available, e.g. unsupported encryption scheme. */
+#define MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE            -0x1F00
+/** PBE ASN.1 data not as expected. */
+#define MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT             -0x1E80
+/** Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH              -0x1E00
 
 #define MBEDTLS_PKCS12_DERIVE_KEY       1   /**< encryption/decryption key */
 #define MBEDTLS_PKCS12_DERIVE_IV        2   /**< initialization vector     */
@@ -54,25 +54,6 @@
 
 /**
  * \brief            PKCS12 Password Based function (encryption / decryption)
- *                   for pbeWithSHAAnd128BitRC4
- *
- * \param pbe_params an ASN1 buffer containing the pkcs-12PbeParams structure
- * \param mode       either MBEDTLS_PKCS12_PBE_ENCRYPT or MBEDTLS_PKCS12_PBE_DECRYPT
- * \param pwd        the password used (may be NULL if no password is used)
- * \param pwdlen     length of the password (may be 0)
- * \param input      the input data
- * \param len        data length
- * \param output     the output buffer
- *
- * \return           0 if successful, or a MBEDTLS_ERR_XXX code
- */
-int mbedtls_pkcs12_pbe_sha1_rc4_128( mbedtls_asn1_buf *pbe_params, int mode,
-                             const unsigned char *pwd,  size_t pwdlen,
-                             const unsigned char *input, size_t len,
-                             unsigned char *output );
-
-/**
- * \brief            PKCS12 Password Based function (encryption / decryption)
  *                   for cipher-based and mbedtls_md-based PBE's
  *
  * \param pbe_params an ASN1 buffer containing the pkcs-12PbeParams structure
diff --git a/include/mbedtls/pkcs5.h b/include/mbedtls/pkcs5.h
index 8f348ce..71d716b 100644
--- a/include/mbedtls/pkcs5.h
+++ b/include/mbedtls/pkcs5.h
@@ -24,11 +24,7 @@
 #ifndef MBEDTLS_PKCS5_H
 #define MBEDTLS_PKCS5_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/asn1.h"
 #include "mbedtls/md.h"
@@ -36,10 +32,14 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#define MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA                  -0x2f80  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_PKCS5_INVALID_FORMAT                  -0x2f00  /**< Unexpected ASN.1 data. */
-#define MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE             -0x2e80  /**< Requested encryption or digest alg not available. */
-#define MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH               -0x2e00  /**< Given private key password does not allow for correct decryption. */
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_PKCS5_BAD_INPUT_DATA                  -0x2f80
+/** Unexpected ASN.1 data. */
+#define MBEDTLS_ERR_PKCS5_INVALID_FORMAT                  -0x2f00
+/** Requested encryption or digest alg not available. */
+#define MBEDTLS_ERR_PKCS5_FEATURE_UNAVAILABLE             -0x2e80
+/** Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH               -0x2e00
 
 #define MBEDTLS_PKCS5_DECRYPT      0
 #define MBEDTLS_PKCS5_ENCRYPT      1
diff --git a/include/mbedtls/platform.h b/include/mbedtls/platform.h
index c944732..277a85c 100644
--- a/include/mbedtls/platform.h
+++ b/include/mbedtls/platform.h
@@ -30,12 +30,9 @@
  */
 #ifndef MBEDTLS_PLATFORM_H
 #define MBEDTLS_PLATFORM_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #if defined(MBEDTLS_HAVE_TIME)
 #include "mbedtls/platform_time.h"
@@ -49,7 +46,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
@@ -367,7 +364,7 @@
  */
 typedef struct mbedtls_platform_context
 {
-    char dummy; /**< A placeholder member, as empty structs are not portable. */
+    char MBEDTLS_PRIVATE(dummy); /**< A placeholder member, as empty structs are not portable. */
 }
 mbedtls_platform_context;
 
diff --git a/include/mbedtls/platform_time.h b/include/mbedtls/platform_time.h
index 7e7daab..8d4b95d 100644
--- a/include/mbedtls/platform_time.h
+++ b/include/mbedtls/platform_time.h
@@ -22,11 +22,7 @@
 #ifndef MBEDTLS_PLATFORM_TIME_H
 #define MBEDTLS_PLATFORM_TIME_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -36,7 +32,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
diff --git a/include/mbedtls/platform_util.h b/include/mbedtls/platform_util.h
index fbc2a0d..1a0a135 100644
--- a/include/mbedtls/platform_util.h
+++ b/include/mbedtls/platform_util.h
@@ -23,11 +23,7 @@
 #ifndef MBEDTLS_PLATFORM_UTIL_H
 #define MBEDTLS_PLATFORM_UTIL_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #if defined(MBEDTLS_HAVE_TIME_DATE)
@@ -39,78 +35,10 @@
 extern "C" {
 #endif
 
-#if defined(MBEDTLS_CHECK_PARAMS)
-
-#if defined(MBEDTLS_CHECK_PARAMS_ASSERT)
-/* Allow the user to define MBEDTLS_PARAM_FAILED to something like assert
- * (which is what our config.h suggests). */
-#include <assert.h>
-#endif /* MBEDTLS_CHECK_PARAMS_ASSERT */
-
-#if defined(MBEDTLS_PARAM_FAILED)
-/** An alternative definition of MBEDTLS_PARAM_FAILED has been set in config.h.
- *
- * This flag can be used to check whether it is safe to assume that
- * MBEDTLS_PARAM_FAILED() will expand to a call to mbedtls_param_failed().
- */
-#define MBEDTLS_PARAM_FAILED_ALT
-
-#elif defined(MBEDTLS_CHECK_PARAMS_ASSERT)
-#define MBEDTLS_PARAM_FAILED( cond ) assert( cond )
-#define MBEDTLS_PARAM_FAILED_ALT
-
-#else /* MBEDTLS_PARAM_FAILED */
-#define MBEDTLS_PARAM_FAILED( cond ) \
-    mbedtls_param_failed( #cond, __FILE__, __LINE__ )
-
-/**
- * \brief       User supplied callback function for parameter validation failure.
- *              See #MBEDTLS_CHECK_PARAMS for context.
- *
- *              This function will be called unless an alternative treatement
- *              is defined through the #MBEDTLS_PARAM_FAILED macro.
- *
- *              This function can return, and the operation will be aborted, or
- *              alternatively, through use of setjmp()/longjmp() can resume
- *              execution in the application code.
- *
- * \param failure_condition The assertion that didn't hold.
- * \param file  The file where the assertion failed.
- * \param line  The line in the file where the assertion failed.
- */
-void mbedtls_param_failed( const char *failure_condition,
-                           const char *file,
-                           int line );
-#endif /* MBEDTLS_PARAM_FAILED */
-
-/* Internal macro meant to be called only from within the library. */
-#define MBEDTLS_INTERNAL_VALIDATE_RET( cond, ret )  \
-    do {                                            \
-        if( !(cond) )                               \
-        {                                           \
-            MBEDTLS_PARAM_FAILED( cond );           \
-            return( ret );                          \
-        }                                           \
-    } while( 0 )
-
-/* Internal macro meant to be called only from within the library. */
-#define MBEDTLS_INTERNAL_VALIDATE( cond )           \
-    do {                                            \
-        if( !(cond) )                               \
-        {                                           \
-            MBEDTLS_PARAM_FAILED( cond );           \
-            return;                                 \
-        }                                           \
-    } while( 0 )
-
-#else /* MBEDTLS_CHECK_PARAMS */
-
 /* Internal macros meant to be called only from within the library. */
 #define MBEDTLS_INTERNAL_VALIDATE_RET( cond, ret )  do { } while( 0 )
 #define MBEDTLS_INTERNAL_VALIDATE( cond )           do { } while( 0 )
 
-#endif /* MBEDTLS_CHECK_PARAMS */
-
 /* Internal helper macros for deprecating API constants. */
 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
 #if defined(MBEDTLS_DEPRECATED_WARNING)
diff --git a/include/mbedtls/poly1305.h b/include/mbedtls/poly1305.h
index 1767f58..6657aa2 100644
--- a/include/mbedtls/poly1305.h
+++ b/include/mbedtls/poly1305.h
@@ -31,17 +31,15 @@
 
 #ifndef MBEDTLS_POLY1305_H
 #define MBEDTLS_POLY1305_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stdint.h>
 #include <stddef.h>
 
-#define MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA         -0x0057 /**< Invalid input parameter(s). */
+/** Invalid input parameter(s). */
+#define MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA         -0x0057
 
 #ifdef __cplusplus
 extern "C" {
@@ -51,11 +49,11 @@
 
 typedef struct mbedtls_poly1305_context
 {
-    uint32_t r[4];      /** The value for 'r' (low 128 bits of the key). */
-    uint32_t s[4];      /** The value for 's' (high 128 bits of the key). */
-    uint32_t acc[5];    /** The accumulator number. */
-    uint8_t queue[16];  /** The current partial block of data. */
-    size_t queue_len;   /** The number of bytes stored in 'queue'. */
+    uint32_t MBEDTLS_PRIVATE(r)[4];      /** The value for 'r' (low 128 bits of the key). */
+    uint32_t MBEDTLS_PRIVATE(s)[4];      /** The value for 's' (high 128 bits of the key). */
+    uint32_t MBEDTLS_PRIVATE(acc)[5];    /** The accumulator number. */
+    uint8_t MBEDTLS_PRIVATE(queue)[16];  /** The current partial block of data. */
+    size_t MBEDTLS_PRIVATE(queue_len);   /** The number of bytes stored in 'queue'. */
 }
 mbedtls_poly1305_context;
 
diff --git a/include/mbedtls/private_access.h b/include/mbedtls/private_access.h
new file mode 100644
index 0000000..98d3419
--- /dev/null
+++ b/include/mbedtls/private_access.h
@@ -0,0 +1,32 @@
+ /**
+ * \file private_access.h
+ *
+ * \brief Macro wrapper for struct's memebrs.
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef MBEDTLS_PRIVATE_ACCESS_H
+#define MBEDTLS_PRIVATE_ACCESS_H
+
+#ifndef MBEDTLS_ALLOW_PRIVATE_ACCESS
+#define MBEDTLS_PRIVATE(member) private_##member
+#else
+#define MBEDTLS_PRIVATE(member) member
+#endif
+
+#endif /* MBEDTLS_PRIVATE_ACCESS_H */
diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index 75fcdac..f6f2e58 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -25,12 +25,9 @@
 
 #ifndef MBEDTLS_PSA_UTIL_H
 #define MBEDTLS_PSA_UTIL_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
 
@@ -120,14 +117,6 @@
 {
     switch( md_alg )
     {
-#if defined(MBEDTLS_MD2_C)
-    case MBEDTLS_MD_MD2:
-        return( PSA_ALG_MD2 );
-#endif
-#if defined(MBEDTLS_MD4_C)
-    case MBEDTLS_MD_MD4:
-        return( PSA_ALG_MD4 );
-#endif
 #if defined(MBEDTLS_MD5_C)
     case MBEDTLS_MD_MD5:
         return( PSA_ALG_MD5 );
@@ -380,7 +369,7 @@
     if( curve_info == NULL )
         return( 0 );
     return( PSA_KEY_TYPE_ECC_KEY_PAIR(
-                mbedtls_ecc_group_to_psa( curve_info->grp_id, bits ) ) );
+                mbedtls_ecc_group_to_psa( curve_info->MBEDTLS_PRIVATE(grp_id), bits ) ) );
 }
 #endif /* MBEDTLS_ECP_C */
 
diff --git a/include/mbedtls/ripemd160.h b/include/mbedtls/ripemd160.h
index 1c72d60..9132a83 100644
--- a/include/mbedtls/ripemd160.h
+++ b/include/mbedtls/ripemd160.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_RIPEMD160_H
 #define MBEDTLS_RIPEMD160_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -44,9 +41,9 @@
  */
 typedef struct mbedtls_ripemd160_context
 {
-    uint32_t total[2];          /*!< number of bytes processed  */
-    uint32_t state[5];          /*!< intermediate digest state  */
-    unsigned char buffer[64];   /*!< data block being processed */
+    uint32_t MBEDTLS_PRIVATE(total)[2];          /*!< number of bytes processed  */
+    uint32_t MBEDTLS_PRIVATE(state)[5];          /*!< intermediate digest state  */
+    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< data block being processed */
 }
 mbedtls_ripemd160_context;
 
@@ -84,7 +81,7 @@
  *
  * \return         0 if successful
  */
-int mbedtls_ripemd160_starts_ret( mbedtls_ripemd160_context *ctx );
+int mbedtls_ripemd160_starts( mbedtls_ripemd160_context *ctx );
 
 /**
  * \brief          RIPEMD-160 process buffer
@@ -95,9 +92,9 @@
  *
  * \return         0 if successful
  */
-int mbedtls_ripemd160_update_ret( mbedtls_ripemd160_context *ctx,
-                                  const unsigned char *input,
-                                  size_t ilen );
+int mbedtls_ripemd160_update( mbedtls_ripemd160_context *ctx,
+                              const unsigned char *input,
+                              size_t ilen );
 
 /**
  * \brief          RIPEMD-160 final digest
@@ -107,8 +104,8 @@
  *
  * \return         0 if successful
  */
-int mbedtls_ripemd160_finish_ret( mbedtls_ripemd160_context *ctx,
-                                  unsigned char output[20] );
+int mbedtls_ripemd160_finish( mbedtls_ripemd160_context *ctx,
+                              unsigned char output[20] );
 
 /**
  * \brief          RIPEMD-160 process data block (internal use only)
@@ -130,9 +127,9 @@
  *
  * \return         0 if successful
  */
-int mbedtls_ripemd160_ret( const unsigned char *input,
-                           size_t ilen,
-                           unsigned char output[20] );
+int mbedtls_ripemd160( const unsigned char *input,
+                       size_t ilen,
+                       unsigned char output[20] );
 
 #if defined(MBEDTLS_SELF_TEST)
 
diff --git a/include/mbedtls/rsa.h b/include/mbedtls/rsa.h
index ba00bff..d03c31d 100644
--- a/include/mbedtls/rsa.h
+++ b/include/mbedtls/rsa.h
@@ -27,12 +27,9 @@
  */
 #ifndef MBEDTLS_RSA_H
 #define MBEDTLS_RSA_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/bignum.h"
 #include "mbedtls/md.h"
@@ -44,15 +41,24 @@
 /*
  * RSA Error codes
  */
-#define MBEDTLS_ERR_RSA_BAD_INPUT_DATA                    -0x4080  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_RSA_INVALID_PADDING                   -0x4100  /**< Input data contains invalid padding and is rejected. */
-#define MBEDTLS_ERR_RSA_KEY_GEN_FAILED                    -0x4180  /**< Something failed during generation of a key. */
-#define MBEDTLS_ERR_RSA_KEY_CHECK_FAILED                  -0x4200  /**< Key failed to pass the validity check of the library. */
-#define MBEDTLS_ERR_RSA_PUBLIC_FAILED                     -0x4280  /**< The public key operation failed. */
-#define MBEDTLS_ERR_RSA_PRIVATE_FAILED                    -0x4300  /**< The private key operation failed. */
-#define MBEDTLS_ERR_RSA_VERIFY_FAILED                     -0x4380  /**< The PKCS#1 verification failed. */
-#define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE                  -0x4400  /**< The output buffer for decryption is not large enough. */
-#define MBEDTLS_ERR_RSA_RNG_FAILED                        -0x4480  /**< The random generator failed to generate non-zeros. */
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_RSA_BAD_INPUT_DATA                    -0x4080
+/** Input data contains invalid padding and is rejected. */
+#define MBEDTLS_ERR_RSA_INVALID_PADDING                   -0x4100
+/** Something failed during generation of a key. */
+#define MBEDTLS_ERR_RSA_KEY_GEN_FAILED                    -0x4180
+/** Key failed to pass the validity check of the library. */
+#define MBEDTLS_ERR_RSA_KEY_CHECK_FAILED                  -0x4200
+/** The public key operation failed. */
+#define MBEDTLS_ERR_RSA_PUBLIC_FAILED                     -0x4280
+/** The private key operation failed. */
+#define MBEDTLS_ERR_RSA_PRIVATE_FAILED                    -0x4300
+/** The PKCS#1 verification failed. */
+#define MBEDTLS_ERR_RSA_VERIFY_FAILED                     -0x4380
+/** The output buffer for decryption is not large enough. */
+#define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE                  -0x4400
+/** The random generator failed to generate non-zeros. */
+#define MBEDTLS_ERR_RSA_RNG_FAILED                        -0x4480
 
 /*
  * RSA constants
@@ -81,48 +87,44 @@
 
 /**
  * \brief   The RSA context structure.
- *
- * \note    Direct manipulation of the members of this structure
- *          is deprecated. All manipulation should instead be done through
- *          the public interface functions.
  */
 typedef struct mbedtls_rsa_context
 {
-    int ver;                    /*!<  Reserved for internal purposes.
+    int MBEDTLS_PRIVATE(ver);                    /*!<  Reserved for internal purposes.
                                  *    Do not set this field in application
                                  *    code. Its meaning might change without
                                  *    notice. */
-    size_t len;                 /*!<  The size of \p N in Bytes. */
+    size_t MBEDTLS_PRIVATE(len);                 /*!<  The size of \p N in Bytes. */
 
-    mbedtls_mpi N;              /*!<  The public modulus. */
-    mbedtls_mpi E;              /*!<  The public exponent. */
+    mbedtls_mpi MBEDTLS_PRIVATE(N);              /*!<  The public modulus. */
+    mbedtls_mpi MBEDTLS_PRIVATE(E);              /*!<  The public exponent. */
 
-    mbedtls_mpi D;              /*!<  The private exponent. */
-    mbedtls_mpi P;              /*!<  The first prime factor. */
-    mbedtls_mpi Q;              /*!<  The second prime factor. */
+    mbedtls_mpi MBEDTLS_PRIVATE(D);              /*!<  The private exponent. */
+    mbedtls_mpi MBEDTLS_PRIVATE(P);              /*!<  The first prime factor. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Q);              /*!<  The second prime factor. */
 
-    mbedtls_mpi DP;             /*!<  <code>D % (P - 1)</code>. */
-    mbedtls_mpi DQ;             /*!<  <code>D % (Q - 1)</code>. */
-    mbedtls_mpi QP;             /*!<  <code>1 / (Q % P)</code>. */
+    mbedtls_mpi MBEDTLS_PRIVATE(DP);             /*!<  <code>D % (P - 1)</code>. */
+    mbedtls_mpi MBEDTLS_PRIVATE(DQ);             /*!<  <code>D % (Q - 1)</code>. */
+    mbedtls_mpi MBEDTLS_PRIVATE(QP);             /*!<  <code>1 / (Q % P)</code>. */
 
-    mbedtls_mpi RN;             /*!<  cached <code>R^2 mod N</code>. */
+    mbedtls_mpi MBEDTLS_PRIVATE(RN);             /*!<  cached <code>R^2 mod N</code>. */
 
-    mbedtls_mpi RP;             /*!<  cached <code>R^2 mod P</code>. */
-    mbedtls_mpi RQ;             /*!<  cached <code>R^2 mod Q</code>. */
+    mbedtls_mpi MBEDTLS_PRIVATE(RP);             /*!<  cached <code>R^2 mod P</code>. */
+    mbedtls_mpi MBEDTLS_PRIVATE(RQ);             /*!<  cached <code>R^2 mod Q</code>. */
 
-    mbedtls_mpi Vi;             /*!<  The cached blinding value. */
-    mbedtls_mpi Vf;             /*!<  The cached un-blinding value. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Vi);             /*!<  The cached blinding value. */
+    mbedtls_mpi MBEDTLS_PRIVATE(Vf);             /*!<  The cached un-blinding value. */
 
-    int padding;                /*!< Selects padding mode:
+    int MBEDTLS_PRIVATE(padding);                /*!< Selects padding mode:
                                      #MBEDTLS_RSA_PKCS_V15 for 1.5 padding and
                                      #MBEDTLS_RSA_PKCS_V21 for OAEP or PSS. */
-    int hash_id;                /*!< Hash identifier of mbedtls_md_type_t type,
+    int MBEDTLS_PRIVATE(hash_id);                /*!< Hash identifier of mbedtls_md_type_t type,
                                      as specified in md.h for use in the MGF
                                      mask generating function used in the
                                      EME-OAEP and EMSA-PSS encodings. */
 #if defined(MBEDTLS_THREADING_C)
     /* Invariant: the mutex is initialized iff ver != 0. */
-    mbedtls_threading_mutex_t mutex;    /*!<  Thread-safety mutex. */
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);    /*!<  Thread-safety mutex. */
 #endif
 }
 mbedtls_rsa_context;
@@ -134,33 +136,51 @@
 /**
  * \brief          This function initializes an RSA context.
  *
+ * \note           This function initializes the padding and the hash
+ *                 identifier to respectively #MBEDTLS_RSA_PKCS_V15 and
+ *                 #MBEDTLS_MD_NONE. See mbedtls_rsa_set_padding() for more
+ *                 information about those parameters.
+ *
+ * \param ctx      The RSA context to initialize. This must not be \c NULL.
+ */
+void mbedtls_rsa_init( mbedtls_rsa_context *ctx );
+
+/**
+ * \brief          This function sets padding for an already initialized RSA
+ *                 context.
+ *
  * \note           Set padding to #MBEDTLS_RSA_PKCS_V21 for the RSAES-OAEP
  *                 encryption scheme and the RSASSA-PSS signature scheme.
  *
  * \note           The \p hash_id parameter is ignored when using
  *                 #MBEDTLS_RSA_PKCS_V15 padding.
  *
- * \note           The choice of padding mode is strictly enforced for private key
- *                 operations, since there might be security concerns in
+ * \note           The choice of padding mode is strictly enforced for private
+ *                 key operations, since there might be security concerns in
  *                 mixing padding modes. For public key operations it is
  *                 a default value, which can be overridden by calling specific
- *                 \c rsa_rsaes_xxx or \c rsa_rsassa_xxx functions.
+ *                 \c mbedtls_rsa_rsaes_xxx or \c mbedtls_rsa_rsassa_xxx
+ *                 functions.
  *
  * \note           The hash selected in \p hash_id is always used for OEAP
  *                 encryption. For PSS signatures, it is always used for
  *                 making signatures, but can be overridden for verifying them.
  *                 If set to #MBEDTLS_MD_NONE, it is always overridden.
  *
- * \param ctx      The RSA context to initialize. This must not be \c NULL.
+ * \param ctx      The initialized RSA context to be configured.
  * \param padding  The padding mode to use. This must be either
  *                 #MBEDTLS_RSA_PKCS_V15 or #MBEDTLS_RSA_PKCS_V21.
- * \param hash_id  The hash identifier of ::mbedtls_md_type_t type, if
- *                 \p padding is #MBEDTLS_RSA_PKCS_V21. It is unused
- *                 otherwise.
+ * \param hash_id  The hash identifier for PSS or OAEP, if \p padding is
+ *                 #MBEDTLS_RSA_PKCS_V21. #MBEDTLS_MD_NONE is accepted by this
+ *                 function but may be not suitable for some operations.
+ *                 Ignored if \p padding is #MBEDTLS_RSA_PKCS_V15.
+ *
+ * \return         \c 0 on success.
+ * \return         #MBEDTLS_ERR_RSA_INVALID_PADDING failure:
+ *                 \p padding or \p hash_id is invalid.
  */
-void mbedtls_rsa_init( mbedtls_rsa_context *ctx,
-                       int padding,
-                       int hash_id );
+int mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding,
+                             mbedtls_md_type_t hash_id );
 
 /**
  * \brief          This function imports a set of core parameters into an
@@ -392,18 +412,6 @@
                             mbedtls_mpi *DP, mbedtls_mpi *DQ, mbedtls_mpi *QP );
 
 /**
- * \brief          This function sets padding for an already initialized RSA
- *                 context. See mbedtls_rsa_init() for details.
- *
- * \param ctx      The initialized RSA context to be configured.
- * \param padding  The padding mode to use. This must be either
- *                 #MBEDTLS_RSA_PKCS_V15 or #MBEDTLS_RSA_PKCS_V21.
- * \param hash_id  The #MBEDTLS_RSA_PKCS_V21 hash identifier.
- */
-void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding,
-                              int hash_id );
-
-/**
  * \brief          This function retrieves the length of RSA modulus in Bytes.
  *
  * \param ctx      The initialized RSA context.
@@ -793,13 +801,11 @@
  *                 if \p f_rng doesn't need a context argument.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param sig      The buffer to hold the signature. This must be a writable
  *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
  *                 for an 2048-bit RSA modulus. A buffer length of
@@ -827,13 +833,11 @@
  *                 if \p f_rng doesn't need a context argument.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param sig      The buffer to hold the signature. This must be a writable
  *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
  *                 for an 2048-bit RSA modulus. A buffer length of
@@ -854,12 +858,13 @@
  * \brief          This function performs a PKCS#1 v2.1 PSS signature
  *                 operation (RSASSA-PSS-SIGN).
  *
- * \note           The \p hash_id in the RSA context is the one used for the
- *                 encoding. \p md_alg in the function call is the type of hash
- *                 that is encoded. According to <em>RFC-3447: Public-Key
+ * \note           The \c hash_id set in \p ctx by calling
+ *                 mbedtls_rsa_set_padding() selects the hash used for the
+ *                 encoding operation and for the mask generation function
+ *                 (MGF1). For more details on the encoding operation and the
+ *                 mask generation function, consult <em>RFC-3447: Public-Key
  *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
- *                 Specifications</em> it is advised to keep both hashes the
- *                 same.
+ *                 Specifications</em>.
  *
  * \note           This function enforces that the provided salt length complies
  *                 with FIPS 186-4 §5.5 (e) and RFC 8017 (PKCS#1 v2.2) §9.1.1
@@ -874,13 +879,11 @@
  *                 if \p f_rng doesn't need a context argument.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param saltlen  The length of the salt that should be used.
  *                 If passed #MBEDTLS_RSA_SALT_LEN_ANY, the function will use
  *                 the largest possible salt length up to the hash length,
@@ -907,12 +910,13 @@
  * \brief          This function performs a PKCS#1 v2.1 PSS signature
  *                 operation (RSASSA-PSS-SIGN).
  *
- * \note           The \p hash_id in the RSA context is the one used for the
- *                 encoding. \p md_alg in the function call is the type of hash
- *                 that is encoded. According to <em>RFC-3447: Public-Key
+ * \note           The \c hash_id set in \p ctx by calling
+ *                 mbedtls_rsa_set_padding() selects the hash used for the
+ *                 encoding operation and for the mask generation function
+ *                 (MGF1). For more details on the encoding operation and the
+ *                 mask generation function, consult <em>RFC-3447: Public-Key
  *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
- *                 Specifications</em> it is advised to keep both hashes the
- *                 same.
+ *                 Specifications</em>.
  *
  * \note           This function always uses the maximum possible salt size,
  *                 up to the length of the payload hash. This choice of salt
@@ -930,13 +934,11 @@
  *                 if \p f_rng doesn't need a context argument.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 Ths is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param sig      The buffer to hold the signature. This must be a writable
  *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
  *                 for an 2048-bit RSA modulus. A buffer length of
@@ -967,13 +969,11 @@
  * \param ctx      The initialized RSA public key context to use.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param sig      The buffer holding the signature. This must be a readable
  *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
  *                 for an 2048-bit RSA modulus.
@@ -994,13 +994,11 @@
  * \param ctx      The initialized RSA public key context to use.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param sig      The buffer holding the signature. This must be a readable
  *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
  *                 for an 2048-bit RSA modulus.
@@ -1018,27 +1016,24 @@
  * \brief          This function performs a PKCS#1 v2.1 PSS verification
  *                 operation (RSASSA-PSS-VERIFY).
  *
- *                 The hash function for the MGF mask generating function
- *                 is that specified in the RSA context.
- *
- * \note           The \p hash_id in the RSA context is the one used for the
- *                 verification. \p md_alg in the function call is the type of
- *                 hash that is verified. According to <em>RFC-3447: Public-Key
+ * \note           The \c hash_id set in \p ctx by calling
+ *                 mbedtls_rsa_set_padding() selects the hash used for the
+ *                 encoding operation and for the mask generation function
+ *                 (MGF1). For more details on the encoding operation and the
+ *                 mask generation function, consult <em>RFC-3447: Public-Key
  *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
- *                 Specifications</em> it is advised to keep both hashes the
- *                 same. If \p hash_id in the RSA context is unset,
- *                 the \p md_alg from the function call is used.
+ *                 Specifications</em>. If the \c hash_id set in \p ctx by
+ *                 mbedtls_rsa_set_padding() is #MBEDTLS_MD_NONE, the \p md_alg
+ *                 parameter is used.
  *
  * \param ctx      The initialized RSA public key context to use.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
  * \param sig      The buffer holding the signature. This must be a readable
  *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
  *                 for an 2048-bit RSA modulus.
@@ -1056,25 +1051,27 @@
  * \brief          This function performs a PKCS#1 v2.1 PSS verification
  *                 operation (RSASSA-PSS-VERIFY).
  *
- *                 The hash function for the MGF mask generating function
- *                 is that specified in \p mgf1_hash_id.
- *
  * \note           The \p sig buffer must be as large as the size
  *                 of \p ctx->N. For example, 128 Bytes if RSA-1024 is used.
  *
- * \note           The \p hash_id in the RSA context is ignored.
+ * \note           The \c hash_id set in \p ctx by mbedtls_rsa_set_padding() is
+ *                 ignored.
  *
  * \param ctx      The initialized RSA public key context to use.
  * \param md_alg   The message-digest algorithm used to hash the original data.
  *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest.
- *                 This is only used if \p md_alg is #MBEDTLS_MD_NONE.
+ * \param hashlen  The length of the message digest or raw data in Bytes.
+ *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
+ *                 output length of the corresponding hash algorithm.
  * \param hash     The buffer holding the message digest or raw data.
- *                 If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable
- *                 buffer of length \p hashlen Bytes. If \p md_alg is not
- *                 #MBEDTLS_MD_NONE, it must be a readable buffer of length
- *                 the size of the hash corresponding to \p md_alg.
- * \param mgf1_hash_id      The message digest used for mask generation.
+ *                 This must be a readable buffer of at least \p hashlen Bytes.
+ * \param mgf1_hash_id      The message digest algorithm used for the
+ *                          verification operation and the mask generation
+ *                          function (MGF1). For more details on the encoding
+ *                          operation and the mask generation function, consult
+ *                          <em>RFC-3447: Public-Key Cryptography Standards
+ *                          (PKCS) #1 v2.1: RSA Cryptography
+ *                          Specifications</em>.
  * \param expected_salt_len The length of the salt used in padding. Use
  *                          #MBEDTLS_RSA_SALT_LEN_ANY to accept any salt length.
  * \param sig      The buffer holding the signature. This must be a readable
diff --git a/include/mbedtls/sha1.h b/include/mbedtls/sha1.h
index 56ff948..6b55174 100644
--- a/include/mbedtls/sha1.h
+++ b/include/mbedtls/sha1.h
@@ -28,17 +28,15 @@
  */
 #ifndef MBEDTLS_SHA1_H
 #define MBEDTLS_SHA1_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
-#define MBEDTLS_ERR_SHA1_BAD_INPUT_DATA                   -0x0073  /**< SHA-1 input data was malformed. */
+/** SHA-1 input data was malformed. */
+#define MBEDTLS_ERR_SHA1_BAD_INPUT_DATA                   -0x0073
 
 #ifdef __cplusplus
 extern "C" {
@@ -58,9 +56,9 @@
  */
 typedef struct mbedtls_sha1_context
 {
-    uint32_t total[2];          /*!< The number of Bytes processed.  */
-    uint32_t state[5];          /*!< The intermediate digest state.  */
-    unsigned char buffer[64];   /*!< The data block being processed. */
+    uint32_t MBEDTLS_PRIVATE(total)[2];          /*!< The number of Bytes processed.  */
+    uint32_t MBEDTLS_PRIVATE(state)[5];          /*!< The intermediate digest state.  */
+    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< The data block being processed. */
 }
 mbedtls_sha1_context;
 
@@ -123,7 +121,7 @@
  * \return         A negative error code on failure.
  *
  */
-int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx );
+int mbedtls_sha1_starts( mbedtls_sha1_context *ctx );
 
 /**
  * \brief          This function feeds an input buffer into an ongoing SHA-1
@@ -142,9 +140,9 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx,
-                             const unsigned char *input,
-                             size_t ilen );
+int mbedtls_sha1_update( mbedtls_sha1_context *ctx,
+                         const unsigned char *input,
+                         size_t ilen );
 
 /**
  * \brief          This function finishes the SHA-1 operation, and writes
@@ -162,8 +160,8 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx,
-                             unsigned char output[20] );
+int mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
+                         unsigned char output[20] );
 
 /**
  * \brief          SHA-1 process data block (internal use only).
@@ -206,9 +204,9 @@
  * \return         A negative error code on failure.
  *
  */
-int mbedtls_sha1_ret( const unsigned char *input,
-                      size_t ilen,
-                      unsigned char output[20] );
+int mbedtls_sha1( const unsigned char *input,
+                  size_t ilen,
+                  unsigned char output[20] );
 
 #if defined(MBEDTLS_SELF_TEST)
 
diff --git a/include/mbedtls/sha256.h b/include/mbedtls/sha256.h
index 22c2c7d..9e6f59d 100644
--- a/include/mbedtls/sha256.h
+++ b/include/mbedtls/sha256.h
@@ -24,17 +24,15 @@
  */
 #ifndef MBEDTLS_SHA256_H
 #define MBEDTLS_SHA256_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
-#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA                 -0x0074  /**< SHA-256 input data was malformed. */
+/** SHA-256 input data was malformed. */
+#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA                 -0x0074
 
 #ifdef __cplusplus
 extern "C" {
@@ -49,14 +47,14 @@
  *
  *                 The structure is used both for SHA-256 and for SHA-224
  *                 checksum calculations. The choice between these two is
- *                 made in the call to mbedtls_sha256_starts_ret().
+ *                 made in the call to mbedtls_sha256_starts().
  */
 typedef struct mbedtls_sha256_context
 {
-    uint32_t total[2];          /*!< The number of Bytes processed.  */
-    uint32_t state[8];          /*!< The intermediate digest state.  */
-    unsigned char buffer[64];   /*!< The data block being processed. */
-    int is224;                  /*!< Determines which function to use:
+    uint32_t MBEDTLS_PRIVATE(total)[2];          /*!< The number of Bytes processed.  */
+    uint32_t MBEDTLS_PRIVATE(state)[8];          /*!< The intermediate digest state.  */
+    unsigned char MBEDTLS_PRIVATE(buffer)[64];   /*!< The data block being processed. */
+    int MBEDTLS_PRIVATE(is224);                  /*!< Determines which function to use:
                                      0: Use SHA-256, or 1: Use SHA-224. */
 }
 mbedtls_sha256_context;
@@ -101,7 +99,7 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 );
+int mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );
 
 /**
  * \brief          This function feeds an input buffer into an ongoing
@@ -116,9 +114,9 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
-                               const unsigned char *input,
-                               size_t ilen );
+int mbedtls_sha256_update( mbedtls_sha256_context *ctx,
+                           const unsigned char *input,
+                           size_t ilen );
 
 /**
  * \brief          This function finishes the SHA-256 operation, and writes
@@ -133,8 +131,8 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
-                               unsigned char *output );
+int mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
+                           unsigned char *output );
 
 /**
  * \brief          This function processes a single data block within
@@ -170,10 +168,10 @@
  * \param is224    Determines which function to use. This must be
  *                 either \c 0 for SHA-256, or \c 1 for SHA-224.
  */
-int mbedtls_sha256_ret( const unsigned char *input,
-                        size_t ilen,
-                        unsigned char *output,
-                        int is224 );
+int mbedtls_sha256( const unsigned char *input,
+                    size_t ilen,
+                    unsigned char *output,
+                    int is224 );
 
 #if defined(MBEDTLS_SELF_TEST)
 
diff --git a/include/mbedtls/sha512.h b/include/mbedtls/sha512.h
index 04222f4..48901cc 100644
--- a/include/mbedtls/sha512.h
+++ b/include/mbedtls/sha512.h
@@ -23,17 +23,15 @@
  */
 #ifndef MBEDTLS_SHA512_H
 #define MBEDTLS_SHA512_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
-#define MBEDTLS_ERR_SHA512_BAD_INPUT_DATA                 -0x0075  /**< SHA-512 input data was malformed. */
+/** SHA-512 input data was malformed. */
+#define MBEDTLS_ERR_SHA512_BAD_INPUT_DATA                 -0x0075
 
 #ifdef __cplusplus
 extern "C" {
@@ -48,16 +46,16 @@
  *
  *                 The structure is used both for SHA-384 and for SHA-512
  *                 checksum calculations. The choice between these two is
- *                 made in the call to mbedtls_sha512_starts_ret().
+ *                 made in the call to mbedtls_sha512_starts().
  */
 typedef struct mbedtls_sha512_context
 {
-    uint64_t total[2];          /*!< The number of Bytes processed. */
-    uint64_t state[8];          /*!< The intermediate digest state. */
-    unsigned char buffer[128];  /*!< The data block being processed. */
+    uint64_t MBEDTLS_PRIVATE(total)[2];          /*!< The number of Bytes processed. */
+    uint64_t MBEDTLS_PRIVATE(state)[8];          /*!< The intermediate digest state. */
+    unsigned char MBEDTLS_PRIVATE(buffer)[128];  /*!< The data block being processed. */
 #if defined(MBEDTLS_SHA384_C)
-    int is384;                  /*!< Determines which function to use:
-                                     0: Use SHA-512, or 1: Use SHA-384. */
+    int MBEDTLS_PRIVATE(is384);                  /*!< Determines which function to use:
+                                                      0: Use SHA-512, or 1: Use SHA-384. */
 #endif
 }
 mbedtls_sha512_context;
@@ -108,7 +106,7 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 );
+int mbedtls_sha512_starts( mbedtls_sha512_context *ctx, int is384 );
 
 /**
  * \brief          This function feeds an input buffer into an ongoing
@@ -123,9 +121,9 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
-                    const unsigned char *input,
-                    size_t ilen );
+int mbedtls_sha512_update( mbedtls_sha512_context *ctx,
+                           const unsigned char *input,
+                           size_t ilen );
 
 /**
  * \brief          This function finishes the SHA-512 operation, and writes
@@ -140,8 +138,8 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
-                               unsigned char *output );
+int mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
+                           unsigned char *output );
 
 /**
  * \brief          This function processes a single data block within
@@ -184,10 +182,10 @@
  * \return         \c 0 on success.
  * \return         A negative error code on failure.
  */
-int mbedtls_sha512_ret( const unsigned char *input,
-                        size_t ilen,
-                        unsigned char *output,
-                        int is384 );
+int mbedtls_sha512( const unsigned char *input,
+                    size_t ilen,
+                    unsigned char *output,
+                    int is384 );
 
 #if defined(MBEDTLS_SELF_TEST)
 
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index cf5ab8e..f533859 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_SSL_H
 #define MBEDTLS_SSL_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/bignum.h"
 #include "mbedtls/ecp.h"
@@ -62,77 +59,154 @@
 /*
  * SSL Error codes
  */
-#define MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE               -0x7080  /**< The requested feature is not available. */
-#define MBEDTLS_ERR_SSL_BAD_INPUT_DATA                    -0x7100  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_SSL_INVALID_MAC                       -0x7180  /**< Verification of the message MAC failed. */
-#define MBEDTLS_ERR_SSL_INVALID_RECORD                    -0x7200  /**< An invalid SSL record was received. */
-#define MBEDTLS_ERR_SSL_CONN_EOF                          -0x7280  /**< The connection indicated an EOF. */
-/* NOTE: Error space gap */
-#define MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN                  -0x7380  /**< The server has no ciphersuites in common with the client. */
-#define MBEDTLS_ERR_SSL_NO_RNG                            -0x7400  /**< No RNG was provided to the SSL module. */
-#define MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE             -0x7480  /**< No client certification received from the client, but required by the authentication mode. */
-/* NOTE: Error space gap */
-/* NOTE: Error space gap */
-#define MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED              -0x7600  /**< The own private key or pre-shared key is not set, but needed. */
-#define MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED                 -0x7680  /**< No CA Chain is set, but required to operate. */
-#define MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE                -0x7700  /**< An unexpected message was received from our peer. */
-#define MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE               -0x7780  /**< A fatal alert message was received from our peer. */
-/* NOTE: Error space gap */
-#define MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY                 -0x7880  /**< The peer notified us that the connection is going to be closed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO               -0x7900  /**< Processing of the ClientHello handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO               -0x7980  /**< Processing of the ServerHello handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE                -0x7A00  /**< Processing of the Certificate handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST        -0x7A80  /**< Processing of the CertificateRequest handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE        -0x7B00  /**< Processing of the ServerKeyExchange handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE          -0x7B80  /**< Processing of the ServerHelloDone handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE        -0x7C00  /**< Processing of the ClientKeyExchange handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP     -0x7C80  /**< Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Read Public. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS     -0x7D00  /**< Processing of the ClientKeyExchange handshake message failed in DHM / ECDH Calculate Secret. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY         -0x7D80  /**< Processing of the CertificateVerify handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC         -0x7E00  /**< Processing of the ChangeCipherSpec handshake message failed. */
-#define MBEDTLS_ERR_SSL_BAD_HS_FINISHED                   -0x7E80  /**< Processing of the Finished handshake message failed. */
-#define MBEDTLS_ERR_SSL_ALLOC_FAILED                      -0x7F00  /**< Memory allocation failed */
-#define MBEDTLS_ERR_SSL_HW_ACCEL_FAILED                   -0x7F80  /**< Hardware acceleration function returned with error */
-#define MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH              -0x6F80  /**< Hardware acceleration function skipped / left alone data */
-#define MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION           -0x6E80  /**< Handshake protocol not within min/max boundaries */
-#define MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET         -0x6E00  /**< Processing of the NewSessionTicket handshake message failed. */
-#define MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED            -0x6D80  /**< Session ticket has expired. */
-#define MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH                  -0x6D00  /**< Public key type mismatch (eg, asked for RSA key exchange and presented EC key) */
-#define MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY                  -0x6C80  /**< Unknown identity received (eg, PSK identity) */
-#define MBEDTLS_ERR_SSL_INTERNAL_ERROR                    -0x6C00  /**< Internal error (eg, unexpected failure in lower-level module) */
-#define MBEDTLS_ERR_SSL_COUNTER_WRAPPING                  -0x6B80  /**< A counter would wrap (eg, too many messages exchanged). */
-#define MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO       -0x6B00  /**< Unexpected message at ServerHello in renegotiation. */
-#define MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED             -0x6A80  /**< DTLS client must retry for hello verification */
-#define MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL                  -0x6A00  /**< A buffer is too small to receive or write a message */
-#define MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE             -0x6980  /**< None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages). */
-#define MBEDTLS_ERR_SSL_WANT_READ                         -0x6900  /**< No data of requested type currently available on underlying transport. */
-#define MBEDTLS_ERR_SSL_WANT_WRITE                        -0x6880  /**< Connection requires a write call. */
-#define MBEDTLS_ERR_SSL_TIMEOUT                           -0x6800  /**< The operation timed out. */
-#define MBEDTLS_ERR_SSL_CLIENT_RECONNECT                  -0x6780  /**< The client initiated a reconnect from the same port. */
-#define MBEDTLS_ERR_SSL_UNEXPECTED_RECORD                 -0x6700  /**< Record header looks valid but is not expected. */
-#define MBEDTLS_ERR_SSL_NON_FATAL                         -0x6680  /**< The alert message received indicates a non-fatal error. */
-/* NOTE: Error space gap */
-#define MBEDTLS_ERR_SSL_CONTINUE_PROCESSING               -0x6580  /**< Internal-only message signaling that further message-processing should be done */
-#define MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS                 -0x6500  /**< The asynchronous operation is not completed yet. */
-#define MBEDTLS_ERR_SSL_EARLY_MESSAGE                     -0x6480  /**< Internal-only message signaling that a message arrived early. */
-#define MBEDTLS_ERR_SSL_UNEXPECTED_CID                    -0x6000  /**< An encrypted DTLS-frame with an unexpected CID was received. */
-#define MBEDTLS_ERR_SSL_VERSION_MISMATCH                  -0x5F00  /**< An operation failed due to an unexpected version or configuration. */
-#define MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS                -0x7000  /**< A cryptographic operation is in progress. Try again later. */
-#define MBEDTLS_ERR_SSL_BAD_CONFIG                        -0x5E80  /**< Invalid value in SSL config */
+/** A cryptographic operation is in progress. Try again later. */
+#define MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS                -0x7000
+/** The requested feature is not available. */
+#define MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE               -0x7080
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_SSL_BAD_INPUT_DATA                    -0x7100
+/** Verification of the message MAC failed. */
+#define MBEDTLS_ERR_SSL_INVALID_MAC                       -0x7180
+/** An invalid SSL record was received. */
+#define MBEDTLS_ERR_SSL_INVALID_RECORD                    -0x7200
+/** The connection indicated an EOF. */
+#define MBEDTLS_ERR_SSL_CONN_EOF                          -0x7280
+/** A message could not be parsed due to a syntactic error. */
+#define MBEDTLS_ERR_SSL_DECODE_ERROR                      -0x7300
+/* Error space gap */
+/** No RNG was provided to the SSL module. */
+#define MBEDTLS_ERR_SSL_NO_RNG                            -0x7400
+/** No client certification received from the client, but required by the authentication mode. */
+#define MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE             -0x7480
+/** Client received an extended server hello containing an unsupported extension */
+#define MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION             -0x7500
+/** No ALPN protocols supported that the client advertises */
+#define MBEDTLS_ERR_SSL_NO_APPLICATION_PROTOCOL           -0x7580
+/** The own private key or pre-shared key is not set, but needed. */
+#define MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED              -0x7600
+/** No CA Chain is set, but required to operate. */
+#define MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED                 -0x7680
+/** An unexpected message was received from our peer. */
+#define MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE                -0x7700
+/** A fatal alert message was received from our peer. */
+#define MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE               -0x7780
+/** No server could be identified matching the client's SNI. */
+#define MBEDTLS_ERR_SSL_UNRECOGNIZED_NAME                 -0x7800
+/** The peer notified us that the connection is going to be closed. */
+#define MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY                 -0x7880
+/* Error space gap */
+/* Error space gap */
+/** Processing of the Certificate handshake message failed. */
+#define MBEDTLS_ERR_SSL_BAD_CERTIFICATE                   -0x7A00
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/** Memory allocation failed */
+#define MBEDTLS_ERR_SSL_ALLOC_FAILED                      -0x7F00
+/** Hardware acceleration function returned with error */
+#define MBEDTLS_ERR_SSL_HW_ACCEL_FAILED                   -0x7F80
+/** Hardware acceleration function skipped / left alone data */
+#define MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH              -0x6F80
+/** Handshake protocol not within min/max boundaries */
+#define MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION              -0x6E80
+/** The handshake negotiation failed. */
+#define MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE                 -0x6E00
+/** Session ticket has expired. */
+#define MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED            -0x6D80
+/** Public key type mismatch (eg, asked for RSA key exchange and presented EC key) */
+#define MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH                  -0x6D00
+/** Unknown identity received (eg, PSK identity) */
+#define MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY                  -0x6C80
+/** Internal error (eg, unexpected failure in lower-level module) */
+#define MBEDTLS_ERR_SSL_INTERNAL_ERROR                    -0x6C00
+/** A counter would wrap (eg, too many messages exchanged). */
+#define MBEDTLS_ERR_SSL_COUNTER_WRAPPING                  -0x6B80
+/** Unexpected message at ServerHello in renegotiation. */
+#define MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO       -0x6B00
+/** DTLS client must retry for hello verification */
+#define MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED             -0x6A80
+/** A buffer is too small to receive or write a message */
+#define MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL                  -0x6A00
+/* Error space gap */
+/** No data of requested type currently available on underlying transport. */
+#define MBEDTLS_ERR_SSL_WANT_READ                         -0x6900
+/** Connection requires a write call. */
+#define MBEDTLS_ERR_SSL_WANT_WRITE                        -0x6880
+/** The operation timed out. */
+#define MBEDTLS_ERR_SSL_TIMEOUT                           -0x6800
+/** The client initiated a reconnect from the same port. */
+#define MBEDTLS_ERR_SSL_CLIENT_RECONNECT                  -0x6780
+/** Record header looks valid but is not expected. */
+#define MBEDTLS_ERR_SSL_UNEXPECTED_RECORD                 -0x6700
+/** The alert message received indicates a non-fatal error. */
+#define MBEDTLS_ERR_SSL_NON_FATAL                         -0x6680
+/** A field in a message was incorrect or inconsistent with other fields. */
+#define MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER                 -0x6600
+/** Internal-only message signaling that further message-processing should be done */
+#define MBEDTLS_ERR_SSL_CONTINUE_PROCESSING               -0x6580
+/** The asynchronous operation is not completed yet. */
+#define MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS                 -0x6500
+/** Internal-only message signaling that a message arrived early. */
+#define MBEDTLS_ERR_SSL_EARLY_MESSAGE                     -0x6480
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/* Error space gap */
+/** An encrypted DTLS-frame with an unexpected CID was received. */
+#define MBEDTLS_ERR_SSL_UNEXPECTED_CID                    -0x6000
+/** An operation failed due to an unexpected version or configuration. */
+#define MBEDTLS_ERR_SSL_VERSION_MISMATCH                  -0x5F00
+/** Invalid value in SSL config */
+#define MBEDTLS_ERR_SSL_BAD_CONFIG                        -0x5E80
+
+/*
+ * TLS 1.3 Key Exchange Modes
+ *
+ * Mbed TLS internal identifiers for use with the SSL configuration API
+ * mbedtls_ssl_conf_tls13_key_exchange_modes().
+ */
+
+#define MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK            ( 1u << 0 ) /*!< Pure-PSK TLS 1.3 key exchange,
+                                                                        *   encompassing both externally agreed PSKs
+                                                                        *   as well as resumption PSKs. */
+#define MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_EPHEMERAL      ( 1u << 1 ) /*!< Pure-Ephemeral TLS 1.3 key exchanges,
+                                                                        *   including for example ECDHE and DHE
+                                                                        *   key exchanges. */
+#define MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_EPHEMERAL  ( 1u << 2 ) /*!< PSK-Ephemeral TLS 1.3 key exchanges,
+                                                                        *   using both a PSK and an ephemeral
+                                                                        *   key exchange. */
+
+/* Convenience macros for sets of key exchanges. */
+#define MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_ALL                         \
+    ( MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK              |            \
+      MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_EPHEMERAL    |            \
+      MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_EPHEMERAL )        /*!< All TLS 1.3 key exchanges           */
+#define MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_ALL                     \
+    ( MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK              |            \
+      MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_EPHEMERAL    ) /*!< All PSK-based TLS 1.3 key exchanges */
+#define MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_EPHEMERAL_ALL               \
+    ( MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_EPHEMERAL        |            \
+      MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_EPHEMERAL    ) /*!< All ephemeral TLS 1.3 key exchanges */
 
 /*
  * Various constants
  */
 
 /* These are the high an low bytes of ProtocolVersion as defined by:
- * - RFC 2246: ProtocolVersion version = { 3, 1 };     // TLS v1.0
- * - RFC 4346: ProtocolVersion version = { 3, 2 };     // TLS v1.1
  * - RFC 5246: ProtocolVersion version = { 3, 3 };     // TLS v1.2
  * - RFC 8446: see section 4.2.1
  */
 #define MBEDTLS_SSL_MAJOR_VERSION_3             3
-#define MBEDTLS_SSL_MINOR_VERSION_1             1   /*!< TLS v1.0 deprecated */
-#define MBEDTLS_SSL_MINOR_VERSION_2             2   /*!< TLS v1.1 deprecated */
 #define MBEDTLS_SSL_MINOR_VERSION_3             3   /*!< TLS v1.2 */
 #define MBEDTLS_SSL_MINOR_VERSION_4             4   /*!< TLS v1.3 (experimental) */
 
@@ -204,6 +278,9 @@
 #define MBEDTLS_SSL_DTLS_SRTP_MKI_UNSUPPORTED    0
 #define MBEDTLS_SSL_DTLS_SRTP_MKI_SUPPORTED      1
 
+#define MBEDTLS_SSL_SRV_CIPHERSUITE_ORDER_CLIENT  1
+#define MBEDTLS_SSL_SRV_CIPHERSUITE_ORDER_SERVER  0
+
 /*
  * Default range for DTLS retransmission timer value, in milliseconds.
  * RFC 6347 4.2.4.1 says from 1 second to 60 seconds.
@@ -215,7 +292,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
@@ -257,12 +334,8 @@
 #define MBEDTLS_SSL_CID_OUT_LEN_MAX         32
 #endif
 
-#if !defined(MBEDTLS_SSL_CID_PADDING_GRANULARITY)
-#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16
-#endif
-
-#if !defined(MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY)
-#define MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY 1
+#if !defined(MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY)
+#define MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY 16
 #endif
 
 /* \} name SECTION: Module settings */
@@ -294,6 +367,41 @@
 #define MBEDTLS_SSL_SIG_ECDSA                3
 
 /*
+ * TLS 1.3 signature algorithms
+ * RFC 8446, Section 4.2.2
+ */
+
+/* RSASSA-PKCS1-v1_5 algorithms */
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA256 0x0401
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA384 0x0501
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA512 0x0601
+
+/* ECDSA algorithms */
+#define MBEDTLS_TLS13_SIG_ECDSA_SECP256R1_SHA256 0x0403
+#define MBEDTLS_TLS13_SIG_ECDSA_SECP384R1_SHA384 0x0503
+#define MBEDTLS_TLS13_SIG_ECDSA_SECP521R1_SHA512 0x0603
+
+/* RSASSA-PSS algorithms with public key OID rsaEncryption */
+#define MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA256 0x0804
+#define MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA384 0x0805
+#define MBEDTLS_TLS13_SIG_RSA_PSS_RSAE_SHA512 0x0806
+
+/* EdDSA algorithms */
+#define MBEDTLS_TLS13_SIG_ED25519 0x0807
+#define MBEDTLS_TLS13_SIG_ED448 0x0808
+
+/* RSASSA-PSS algorithms with public key OID RSASSA-PSS  */
+#define MBEDTLS_TLS13_SIG_RSA_PSS_PSS_SHA256 0x0809
+#define MBEDTLS_TLS13_SIG_RSA_PSS_PSS_SHA384 0x080A
+#define MBEDTLS_TLS13_SIG_RSA_PSS_PSS_SHA512 0x080B
+
+/* LEGACY ALGORITHMS */
+#define MBEDTLS_TLS13_SIG_RSA_PKCS1_SHA1 0x0201
+#define MBEDTLS_TLS13_SIG_ECDSA_SHA1     0x0203
+
+#define MBEDTLS_TLS13_SIG_NONE 0x0
+
+/*
  * Client Certificate Types
  * RFC 5246 section 7.4.4 plus RFC 4492 section 5.5
  */
@@ -364,25 +472,48 @@
 #define MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH          1
 
 #define MBEDTLS_TLS_EXT_TRUNCATED_HMAC               4
+#define MBEDTLS_TLS_EXT_STATUS_REQUEST               5 /* RFC 6066 TLS 1.2 and 1.3 */
 
 #define MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES   10
+#define MBEDTLS_TLS_EXT_SUPPORTED_GROUPS            10 /* RFC 8422,7919 TLS 1.2 and 1.3 */
 #define MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS     11
 
-#define MBEDTLS_TLS_EXT_SIG_ALG                     13
-
+#define MBEDTLS_TLS_EXT_SIG_ALG                     13 /* RFC 8446 TLS 1.3 */
 #define MBEDTLS_TLS_EXT_USE_SRTP                    14
-
+#define MBEDTLS_TLS_EXT_HEARTBEAT                   15 /* RFC 6520 TLS 1.2 and 1.3 */
 #define MBEDTLS_TLS_EXT_ALPN                        16
 
+#define MBEDTLS_TLS_EXT_SCT                         18 /* RFC 6962 TLS 1.2 and 1.3 */
+#define MBEDTLS_TLS_EXT_CLI_CERT_TYPE               19 /* RFC 7250 TLS 1.2 and 1.3 */
+#define MBEDTLS_TLS_EXT_SERV_CERT_TYPE              20 /* RFC 7250 TLS 1.2 and 1.3 */
+#define MBEDTLS_TLS_EXT_PADDING                     21 /* RFC 7685 TLS 1.2 and 1.3 */
 #define MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC            22 /* 0x16 */
 #define MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET  0x0017 /* 23 */
 
 #define MBEDTLS_TLS_EXT_SESSION_TICKET              35
 
+#define MBEDTLS_TLS_EXT_PRE_SHARED_KEY              41 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_EARLY_DATA                  42 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS          43 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_COOKIE                      44 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_PSK_KEY_EXCHANGE_MODES      45 /* RFC 8446 TLS 1.3 */
+
+#define MBEDTLS_TLS_EXT_CERT_AUTH                   47 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_OID_FILTERS                 48 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_POST_HANDSHAKE_AUTH         49 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_SIG_ALG_CERT                50 /* RFC 8446 TLS 1.3 */
+#define MBEDTLS_TLS_EXT_KEY_SHARE                   51 /* RFC 8446 TLS 1.3 */
+
 /* The value of the CID extension is still TBD as of
  * draft-ietf-tls-dtls-connection-id-05
- * (https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05) */
+ * (https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05).
+ *
+ * A future minor revision of Mbed TLS may change the default value of
+ * this option to match evolving standards and usage.
+ */
+#if !defined(MBEDTLS_TLS_EXT_CID)
 #define MBEDTLS_TLS_EXT_CID                        254 /* TBD */
+#endif
 
 #define MBEDTLS_TLS_EXT_ECJPAKE_KKPP               256 /* experimental */
 
@@ -459,21 +590,12 @@
     MBEDTLS_SSL_HANDSHAKE_OVER,
     MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET,
     MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT,
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+    MBEDTLS_SSL_ENCRYPTED_EXTENSIONS,
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 }
 mbedtls_ssl_states;
 
-/*
- * The tls_prf function types.
- */
-typedef enum
-{
-   MBEDTLS_SSL_TLS_PRF_NONE,
-   MBEDTLS_SSL_TLS_PRF_TLS1,
-   MBEDTLS_SSL_TLS_PRF_SHA384,
-   MBEDTLS_SSL_TLS_PRF_SHA256
-}
-mbedtls_tls_prf_types;
-
 /**
  * \brief          Callback type: send data on the network.
  *
@@ -505,10 +627,11 @@
  * \param buf      Buffer to write the received data to
  * \param len      Length of the receive buffer
  *
- * \return         The callback must return the number of bytes received,
- *                 or a non-zero error code.
- *                 If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_READ
+ * \returns        If data has been received, the positive number of bytes received.
+ * \returns        \c 0 if the connection has been closed.
+ * \returns        If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_READ
  *                 must be returned when the operation would block.
+ * \returns        Another negative error code on other kinds of failures.
  *
  * \note           The callback may receive fewer bytes than the length of the
  *                 buffer. It must always return the number of bytes actually
@@ -528,7 +651,7 @@
  * \param ctx      Context for the receive callback (typically a file descriptor)
  * \param buf      Buffer to write the received data to
  * \param len      Length of the receive buffer
- * \param timeout  Maximum nomber of millisecondes to wait for data
+ * \param timeout  Maximum number of milliseconds to wait for data
  *                 0 means no timeout (potentially waiting forever)
  *
  * \return         The callback must return the number of bytes received,
@@ -905,11 +1028,11 @@
 typedef struct mbedtls_dtls_srtp_info_t
 {
     /*! The SRTP profile that was negotiated. */
-    mbedtls_ssl_srtp_profile chosen_dtls_srtp_profile;
+    mbedtls_ssl_srtp_profile MBEDTLS_PRIVATE(chosen_dtls_srtp_profile);
     /*! The length of mki_value. */
-    uint16_t mki_len;
+    uint16_t MBEDTLS_PRIVATE(mki_len);
     /*! The mki_value used, with max size of 256 bytes. */
-    unsigned char mki_value[MBEDTLS_TLS_SRTP_MAX_MKI_LENGTH];
+    unsigned char MBEDTLS_PRIVATE(mki_value)[MBEDTLS_TLS_SRTP_MAX_MKI_LENGTH];
 }
 mbedtls_dtls_srtp_info;
 
@@ -929,46 +1052,100 @@
 struct mbedtls_ssl_session
 {
 #if defined(MBEDTLS_HAVE_TIME)
-    mbedtls_time_t start;       /*!< starting time      */
+    mbedtls_time_t MBEDTLS_PRIVATE(start);       /*!< starting time      */
 #endif
-    int ciphersuite;            /*!< chosen ciphersuite */
-    int compression;            /*!< chosen compression */
-    size_t id_len;              /*!< session id length  */
-    unsigned char id[32];       /*!< session identifier */
-    unsigned char master[48];   /*!< the master secret  */
+    int MBEDTLS_PRIVATE(ciphersuite);            /*!< chosen ciphersuite */
+    int MBEDTLS_PRIVATE(compression);            /*!< chosen compression */
+    size_t MBEDTLS_PRIVATE(id_len);              /*!< session id length  */
+    unsigned char MBEDTLS_PRIVATE(id)[32];       /*!< session identifier */
+    unsigned char MBEDTLS_PRIVATE(master)[48];   /*!< the master secret  */
+
+    unsigned char MBEDTLS_PRIVATE(exported);
+
+    /* This field is temporarily duplicated with mbedtls_ssl_context.minor_ver.
+     * Once runtime negotiation of TLS 1.2 and TLS 1.3 is implemented, it needs
+     * to be studied whether one of them can be removed. */
+    unsigned char MBEDTLS_PRIVATE(minor_ver);    /*!< The TLS version used in the session. */
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 #if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
-    mbedtls_x509_crt *peer_cert;       /*!< peer X.509 cert chain */
+    mbedtls_x509_crt *MBEDTLS_PRIVATE(peer_cert);       /*!< peer X.509 cert chain */
 #else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
     /*! The digest of the peer's end-CRT. This must be kept to detect CRT
      *  changes during renegotiation, mitigating the triple handshake attack. */
-    unsigned char *peer_cert_digest;
-    size_t peer_cert_digest_len;
-    mbedtls_md_type_t peer_cert_digest_type;
+    unsigned char *MBEDTLS_PRIVATE(peer_cert_digest);
+    size_t MBEDTLS_PRIVATE(peer_cert_digest_len);
+    mbedtls_md_type_t MBEDTLS_PRIVATE(peer_cert_digest_type);
 #endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
-    uint32_t verify_result;          /*!<  verification result     */
+    uint32_t MBEDTLS_PRIVATE(verify_result);          /*!<  verification result     */
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
-    unsigned char *ticket;      /*!< RFC 5077 session ticket */
-    size_t ticket_len;          /*!< session ticket length   */
-    uint32_t ticket_lifetime;   /*!< ticket lifetime hint    */
+    unsigned char *MBEDTLS_PRIVATE(ticket);      /*!< RFC 5077 session ticket */
+    size_t MBEDTLS_PRIVATE(ticket_len);          /*!< session ticket length   */
+    uint32_t MBEDTLS_PRIVATE(ticket_lifetime);   /*!< ticket lifetime hint    */
 #endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-    unsigned char mfl_code;     /*!< MaxFragmentLength negotiated by peer */
+    unsigned char MBEDTLS_PRIVATE(mfl_code);     /*!< MaxFragmentLength negotiated by peer */
 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
 
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-    int trunc_hmac;             /*!< flag for truncated hmac activation   */
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-    int encrypt_then_mac;       /*!< flag for EtM activation                */
+    int MBEDTLS_PRIVATE(encrypt_then_mac);       /*!< flag for EtM activation                */
 #endif
 };
 
+/*
+ * Identifiers for PRFs used in various versions of TLS.
+ */
+typedef enum
+{
+   MBEDTLS_SSL_TLS_PRF_NONE,
+   MBEDTLS_SSL_TLS_PRF_SHA384,
+   MBEDTLS_SSL_TLS_PRF_SHA256,
+   MBEDTLS_SSL_HKDF_EXPAND_SHA384,
+   MBEDTLS_SSL_HKDF_EXPAND_SHA256
+}
+mbedtls_tls_prf_types;
+
+#if defined(MBEDTLS_SSL_EXPORT_KEYS)
+typedef enum
+{
+    MBEDTLS_SSL_KEY_EXPORT_TLS12_MASTER_SECRET = 0,
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+    MBEDTLS_SSL_KEY_EXPORT_TLS13_CLIENT_EARLY_SECRET,
+    MBEDTLS_SSL_KEY_EXPORT_TLS13_EARLY_EXPORTER_SECRET,
+    MBEDTLS_SSL_KEY_EXPORT_TLS13_CLIENT_HANDSHAKE_TRAFFIC_SECRET,
+    MBEDTLS_SSL_KEY_EXPORT_TLS13_SERVER_HANDSHAKE_TRAFFIC_SECRET,
+    MBEDTLS_SSL_KEY_EXPORT_TLS13_CLIENT_APPLICATION_TRAFFIC_SECRET,
+    MBEDTLS_SSL_KEY_EXPORT_TLS13_SERVER_APPLICATION_TRAFFIC_SECRET,
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
+} mbedtls_ssl_key_export_type;
+
+/**
+ * \brief           Callback type: Export key alongside random values for
+ *                                 session identification, and PRF for
+ *                                 implementation of TLS key exporters.
+ *
+ * \param p_expkey   Context for the callback.
+ * \param type       The type of the key that is being exported.
+ * \param secret     The address of the buffer holding the secret
+ *                   that's being exporterd.
+ * \param secret_len The length of \p secret in bytes.
+ * \param client_random The client random bytes.
+ * \param server_random The server random bytes.
+ * \param tls_prf_type The identifier for the PRF used in the handshake
+ *                     to which the key belongs.
+ */
+typedef void mbedtls_ssl_export_keys_t( void *p_expkey,
+                                        mbedtls_ssl_key_export_type type,
+                                        const unsigned char *secret,
+                                        size_t secret_len,
+                                        const unsigned char client_random[32],
+                                        const unsigned char server_random[32],
+                                        mbedtls_tls_prf_types tls_prf_type );
+#endif /* MBEDTLS_SSL_EXPORT_KEYS */
+
 /**
  * SSL/TLS configuration to be shared between mbedtls_ssl_context structures.
  */
@@ -980,117 +1157,111 @@
      * Pointers
      */
 
-    /** Allowed ciphersuites per version. To access list's elements, please use
-     *  \c mbedtls_ssl_get_protocol_version_ciphersuites
-     */
-    const int *ciphersuite_list[3];
+    /** Allowed ciphersuites for (D)TLS 1.2 (0-terminated)                  */
+    const int *MBEDTLS_PRIVATE(ciphersuite_list);
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+    /** Allowed TLS 1.3 key exchange modes.                                 */
+    int MBEDTLS_PRIVATE(tls13_kex_modes);
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 
     /** Callback for printing debug output                                  */
-    void (*f_dbg)(void *, int, const char *, int, const char *);
-    void *p_dbg;                    /*!< context for the debug function     */
+    void (*MBEDTLS_PRIVATE(f_dbg))(void *, int, const char *, int, const char *);
+    void *MBEDTLS_PRIVATE(p_dbg);                    /*!< context for the debug function     */
 
     /** Callback for getting (pseudo-)random numbers                        */
-    int  (*f_rng)(void *, unsigned char *, size_t);
-    void *p_rng;                    /*!< context for the RNG function       */
+    int  (*MBEDTLS_PRIVATE(f_rng))(void *, unsigned char *, size_t);
+    void *MBEDTLS_PRIVATE(p_rng);                    /*!< context for the RNG function       */
 
     /** Callback to retrieve a session from the cache                       */
-    mbedtls_ssl_cache_get_t *f_get_cache;
+    mbedtls_ssl_cache_get_t *MBEDTLS_PRIVATE(f_get_cache);
     /** Callback to store a session into the cache                          */
-    mbedtls_ssl_cache_set_t *f_set_cache;
-    void *p_cache;                  /*!< context for cache callbacks        */
+    mbedtls_ssl_cache_set_t *MBEDTLS_PRIVATE(f_set_cache);
+    void *MBEDTLS_PRIVATE(p_cache);                  /*!< context for cache callbacks        */
 
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
     /** Callback for setting cert according to SNI extension                */
-    int (*f_sni)(void *, mbedtls_ssl_context *, const unsigned char *, size_t);
-    void *p_sni;                    /*!< context for SNI callback           */
+    int (*MBEDTLS_PRIVATE(f_sni))(void *, mbedtls_ssl_context *, const unsigned char *, size_t);
+    void *MBEDTLS_PRIVATE(p_sni);                    /*!< context for SNI callback           */
 #endif
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     /** Callback to customize X.509 certificate chain verification          */
-    int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *);
-    void *p_vrfy;                   /*!< context for X.509 verify calllback */
+    int (*MBEDTLS_PRIVATE(f_vrfy))(void *, mbedtls_x509_crt *, int, uint32_t *);
+    void *MBEDTLS_PRIVATE(p_vrfy);                   /*!< context for X.509 verify calllback */
 #endif
 
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
     /** Callback to retrieve PSK key from identity                          */
-    int (*f_psk)(void *, mbedtls_ssl_context *, const unsigned char *, size_t);
-    void *p_psk;                    /*!< context for PSK callback           */
+    int (*MBEDTLS_PRIVATE(f_psk))(void *, mbedtls_ssl_context *, const unsigned char *, size_t);
+    void *MBEDTLS_PRIVATE(p_psk);                    /*!< context for PSK callback           */
 #endif
 
 #if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
     /** Callback to create & write a cookie for ClientHello veirifcation    */
-    int (*f_cookie_write)( void *, unsigned char **, unsigned char *,
+    int (*MBEDTLS_PRIVATE(f_cookie_write))( void *, unsigned char **, unsigned char *,
                            const unsigned char *, size_t );
     /** Callback to verify validity of a ClientHello cookie                 */
-    int (*f_cookie_check)( void *, const unsigned char *, size_t,
+    int (*MBEDTLS_PRIVATE(f_cookie_check))( void *, const unsigned char *, size_t,
                            const unsigned char *, size_t );
-    void *p_cookie;                 /*!< context for the cookie callbacks   */
+    void *MBEDTLS_PRIVATE(p_cookie);                 /*!< context for the cookie callbacks   */
 #endif
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_SRV_C)
     /** Callback to create & write a session ticket                         */
-    int (*f_ticket_write)( void *, const mbedtls_ssl_session *,
+    int (*MBEDTLS_PRIVATE(f_ticket_write))( void *, const mbedtls_ssl_session *,
             unsigned char *, const unsigned char *, size_t *, uint32_t * );
     /** Callback to parse a session ticket into a session structure         */
-    int (*f_ticket_parse)( void *, mbedtls_ssl_session *, unsigned char *, size_t);
-    void *p_ticket;                 /*!< context for the ticket callbacks   */
+    int (*MBEDTLS_PRIVATE(f_ticket_parse))( void *, mbedtls_ssl_session *, unsigned char *, size_t);
+    void *MBEDTLS_PRIVATE(p_ticket);                 /*!< context for the ticket callbacks   */
 #endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_SRV_C */
 
-#if defined(MBEDTLS_SSL_EXPORT_KEYS)
-    /** Callback to export key block and master secret                      */
-    int (*f_export_keys)( void *, const unsigned char *,
-            const unsigned char *, size_t, size_t, size_t );
-    /** Callback to export key block, master secret,
-     *  tls_prf and random bytes. Should replace f_export_keys    */
-    int (*f_export_keys_ext)( void *, const unsigned char *,
-                const unsigned char *, size_t, size_t, size_t,
-                const unsigned char[32], const unsigned char[32],
-                mbedtls_tls_prf_types );
-    void *p_export_keys;            /*!< context for key export callback    */
-#endif
-
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-    size_t cid_len; /*!< The length of CIDs for incoming DTLS records.      */
+    size_t MBEDTLS_PRIVATE(cid_len); /*!< The length of CIDs for incoming DTLS records.      */
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
-    const mbedtls_x509_crt_profile *cert_profile; /*!< verification profile */
-    mbedtls_ssl_key_cert *key_cert; /*!< own certificate/key pair(s)        */
-    mbedtls_x509_crt *ca_chain;     /*!< trusted CAs                        */
-    mbedtls_x509_crl *ca_crl;       /*!< trusted CAs CRLs                   */
+    const mbedtls_x509_crt_profile *MBEDTLS_PRIVATE(cert_profile); /*!< verification profile */
+    mbedtls_ssl_key_cert *MBEDTLS_PRIVATE(key_cert); /*!< own certificate/key pair(s)        */
+    mbedtls_x509_crt *MBEDTLS_PRIVATE(ca_chain);     /*!< trusted CAs                        */
+    mbedtls_x509_crl *MBEDTLS_PRIVATE(ca_crl);       /*!< trusted CAs CRLs                   */
 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
-    mbedtls_x509_crt_ca_cb_t f_ca_cb;
-    void *p_ca_cb;
+    mbedtls_x509_crt_ca_cb_t MBEDTLS_PRIVATE(f_ca_cb);
+    void *MBEDTLS_PRIVATE(p_ca_cb);
 #endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
 #if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
-    mbedtls_ssl_async_sign_t *f_async_sign_start; /*!< start asynchronous signature operation */
-    mbedtls_ssl_async_decrypt_t *f_async_decrypt_start; /*!< start asynchronous decryption operation */
+    mbedtls_ssl_async_sign_t *MBEDTLS_PRIVATE(f_async_sign_start); /*!< start asynchronous signature operation */
+    mbedtls_ssl_async_decrypt_t *MBEDTLS_PRIVATE(f_async_decrypt_start); /*!< start asynchronous decryption operation */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
-    mbedtls_ssl_async_resume_t *f_async_resume; /*!< resume asynchronous operation */
-    mbedtls_ssl_async_cancel_t *f_async_cancel; /*!< cancel asynchronous operation */
-    void *p_async_config_data; /*!< Configuration data set by mbedtls_ssl_conf_async_private_cb(). */
+    mbedtls_ssl_async_resume_t *MBEDTLS_PRIVATE(f_async_resume); /*!< resume asynchronous operation */
+    mbedtls_ssl_async_cancel_t *MBEDTLS_PRIVATE(f_async_cancel); /*!< cancel asynchronous operation */
+    void *MBEDTLS_PRIVATE(p_async_config_data); /*!< Configuration data set by mbedtls_ssl_conf_async_private_cb(). */
 #endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
 
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
-    const int *sig_hashes;          /*!< allowed signature hashes           */
+    const int *MBEDTLS_PRIVATE(sig_hashes);          /*!< allowed signature hashes           */
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+    const uint16_t *MBEDTLS_PRIVATE(tls13_sig_algs); /*!< allowed signature algorithms for TLS 1.3 */
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 #endif
 
 #if defined(MBEDTLS_ECP_C)
-    const mbedtls_ecp_group_id *curve_list; /*!< allowed curves             */
+    const mbedtls_ecp_group_id *MBEDTLS_PRIVATE(curve_list); /*!< allowed curves             */
 #endif
 
 #if defined(MBEDTLS_DHM_C)
-    mbedtls_mpi dhm_P;              /*!< prime modulus for DHM              */
-    mbedtls_mpi dhm_G;              /*!< generator for DHM                  */
+    mbedtls_mpi MBEDTLS_PRIVATE(dhm_P);              /*!< prime modulus for DHM              */
+    mbedtls_mpi MBEDTLS_PRIVATE(dhm_G);              /*!< generator for DHM                  */
 #endif
 
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED)
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-    psa_key_id_t psk_opaque; /*!< PSA key slot holding opaque PSK. This field
+    psa_key_id_t MBEDTLS_PRIVATE(psk_opaque); /*!< PSA key slot holding opaque PSK. This field
                               *   should only be set via
                               *   mbedtls_ssl_conf_psk_opaque().
                               *   If either no PSK or a raw PSK have been
@@ -1098,22 +1269,22 @@
                               */
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
-    unsigned char *psk;      /*!< The raw pre-shared key. This field should
+    unsigned char *MBEDTLS_PRIVATE(psk);      /*!< The raw pre-shared key. This field should
                               *   only be set via mbedtls_ssl_conf_psk().
                               *   If either no PSK or an opaque PSK
                               *   have been configured, this has value NULL. */
-    size_t         psk_len;  /*!< The length of the raw pre-shared key.
+    size_t         MBEDTLS_PRIVATE(psk_len);  /*!< The length of the raw pre-shared key.
                               *   This field should only be set via
                               *   mbedtls_ssl_conf_psk().
                               *   Its value is non-zero if and only if
                               *   \c psk is not \c NULL. */
 
-    unsigned char *psk_identity;    /*!< The PSK identity for PSK negotiation.
+    unsigned char *MBEDTLS_PRIVATE(psk_identity);    /*!< The PSK identity for PSK negotiation.
                                      *   This field should only be set via
                                      *   mbedtls_ssl_conf_psk().
                                      *   This is set if and only if either
                                      *   \c psk or \c psk_opaque are set. */
-    size_t         psk_identity_len;/*!< The length of PSK identity.
+    size_t         MBEDTLS_PRIVATE(psk_identity_len);/*!< The length of PSK identity.
                                      *   This field should only be set via
                                      *   mbedtls_ssl_conf_psk().
                                      *   Its value is non-zero if and only if
@@ -1122,264 +1293,282 @@
 #endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */
 
 #if defined(MBEDTLS_SSL_ALPN)
-    const char **alpn_list;         /*!< ordered list of protocols          */
+    const char **MBEDTLS_PRIVATE(alpn_list);         /*!< ordered list of protocols          */
 #endif
 
 #if defined(MBEDTLS_SSL_DTLS_SRTP)
     /*! ordered list of supported srtp profile */
-    const mbedtls_ssl_srtp_profile *dtls_srtp_profile_list;
+    const mbedtls_ssl_srtp_profile *MBEDTLS_PRIVATE(dtls_srtp_profile_list);
     /*! number of supported profiles */
-    size_t dtls_srtp_profile_list_len;
+    size_t MBEDTLS_PRIVATE(dtls_srtp_profile_list_len);
 #endif /* MBEDTLS_SSL_DTLS_SRTP */
 
     /*
      * Numerical settings (int then char)
      */
 
-    uint32_t read_timeout;          /*!< timeout for mbedtls_ssl_read (ms)  */
+    uint32_t MBEDTLS_PRIVATE(read_timeout);          /*!< timeout for mbedtls_ssl_read (ms)  */
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
-    uint32_t hs_timeout_min;        /*!< initial value of the handshake
+    uint32_t MBEDTLS_PRIVATE(hs_timeout_min);        /*!< initial value of the handshake
                                          retransmission timeout (ms)        */
-    uint32_t hs_timeout_max;        /*!< maximum value of the handshake
+    uint32_t MBEDTLS_PRIVATE(hs_timeout_max);        /*!< maximum value of the handshake
                                          retransmission timeout (ms)        */
 #endif
 
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
-    int renego_max_records;         /*!< grace period for renegotiation     */
-    unsigned char renego_period[8]; /*!< value of the record counters
+    int MBEDTLS_PRIVATE(renego_max_records);         /*!< grace period for renegotiation     */
+    unsigned char MBEDTLS_PRIVATE(renego_period)[8]; /*!< value of the record counters
                                          that triggers renegotiation        */
 #endif
 
-    unsigned int badmac_limit;      /*!< limit of records with a bad MAC    */
+    unsigned int MBEDTLS_PRIVATE(badmac_limit);      /*!< limit of records with a bad MAC    */
 
 #if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
-    unsigned int dhm_min_bitlen;    /*!< min. bit length of the DHM prime   */
+    unsigned int MBEDTLS_PRIVATE(dhm_min_bitlen);    /*!< min. bit length of the DHM prime   */
 #endif
 
-    unsigned char max_major_ver;    /*!< max. major version used            */
-    unsigned char max_minor_ver;    /*!< max. minor version used            */
-    unsigned char min_major_ver;    /*!< min. major version used            */
-    unsigned char min_minor_ver;    /*!< min. minor version used            */
+    unsigned char MBEDTLS_PRIVATE(max_major_ver);    /*!< max. major version used            */
+    unsigned char MBEDTLS_PRIVATE(max_minor_ver);    /*!< max. minor version used            */
+    unsigned char MBEDTLS_PRIVATE(min_major_ver);    /*!< min. major version used            */
+    unsigned char MBEDTLS_PRIVATE(min_minor_ver);    /*!< min. minor version used            */
 
     /*
      * Flags (bitfields)
      */
 
-    unsigned int endpoint : 1;      /*!< 0: client, 1: server               */
-    unsigned int transport : 1;     /*!< stream (TLS) or datagram (DTLS)    */
-    unsigned int authmode : 2;      /*!< MBEDTLS_SSL_VERIFY_XXX             */
+    unsigned int MBEDTLS_PRIVATE(endpoint) : 1;      /*!< 0: client, 1: server               */
+    unsigned int MBEDTLS_PRIVATE(transport) : 1;     /*!< stream (TLS) or datagram (DTLS)    */
+    unsigned int MBEDTLS_PRIVATE(authmode) : 2;      /*!< MBEDTLS_SSL_VERIFY_XXX             */
     /* needed even with renego disabled for LEGACY_BREAK_HANDSHAKE          */
-    unsigned int allow_legacy_renegotiation : 2 ; /*!< MBEDTLS_LEGACY_XXX   */
+    unsigned int MBEDTLS_PRIVATE(allow_legacy_renegotiation) : 2 ; /*!< MBEDTLS_LEGACY_XXX   */
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-    unsigned int mfl_code : 3;      /*!< desired fragment length            */
+    unsigned int MBEDTLS_PRIVATE(mfl_code) : 3;      /*!< desired fragment length            */
 #endif
 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-    unsigned int encrypt_then_mac : 1 ; /*!< negotiate encrypt-then-mac?    */
+    unsigned int MBEDTLS_PRIVATE(encrypt_then_mac) : 1 ; /*!< negotiate encrypt-then-mac?    */
 #endif
 #if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-    unsigned int extended_ms : 1;   /*!< negotiate extended master secret?  */
+    unsigned int MBEDTLS_PRIVATE(extended_ms) : 1;   /*!< negotiate extended master secret?  */
 #endif
 #if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
-    unsigned int anti_replay : 1;   /*!< detect and prevent replay?         */
+    unsigned int MBEDTLS_PRIVATE(anti_replay) : 1;   /*!< detect and prevent replay?         */
 #endif
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
-    unsigned int disable_renegotiation : 1; /*!< disable renegotiation?     */
-#endif
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-    unsigned int trunc_hmac : 1;    /*!< negotiate truncated hmac?          */
+    unsigned int MBEDTLS_PRIVATE(disable_renegotiation) : 1; /*!< disable renegotiation?     */
 #endif
 #if defined(MBEDTLS_SSL_SESSION_TICKETS)
-    unsigned int session_tickets : 1;   /*!< use session tickets?           */
+    unsigned int MBEDTLS_PRIVATE(session_tickets) : 1;   /*!< use session tickets?           */
 #endif
 #if defined(MBEDTLS_SSL_SRV_C)
-    unsigned int cert_req_ca_list : 1;  /*!< enable sending CA list in
+    unsigned int MBEDTLS_PRIVATE(cert_req_ca_list) : 1;  /*!< enable sending CA list in
                                           Certificate Request messages?     */
+    unsigned int MBEDTLS_PRIVATE(respect_cli_pref) : 1;  /*!< pick the ciphersuite according to
+                                          the client's preferences rather
+                                          than ours                         */
 #endif
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-    unsigned int ignore_unexpected_cid : 1; /*!< Determines whether DTLS
+    unsigned int MBEDTLS_PRIVATE(ignore_unexpected_cid) : 1; /*!< Determines whether DTLS
                                              *   record with unexpected CID
                                              *   should lead to failure.    */
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
 #if defined(MBEDTLS_SSL_DTLS_SRTP)
-    unsigned int dtls_srtp_mki_support : 1; /* support having mki_value
+    unsigned int MBEDTLS_PRIVATE(dtls_srtp_mki_support) : 1; /* support having mki_value
                                                in the use_srtp extension     */
 #endif
 };
 
 struct mbedtls_ssl_context
 {
-    const mbedtls_ssl_config *conf; /*!< configuration information          */
+    const mbedtls_ssl_config *MBEDTLS_PRIVATE(conf); /*!< configuration information          */
 
     /*
      * Miscellaneous
      */
-    int state;                  /*!< SSL handshake: current state     */
+    int MBEDTLS_PRIVATE(state);                  /*!< SSL handshake: current state     */
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
-    int renego_status;          /*!< Initial, in progress, pending?   */
-    int renego_records_seen;    /*!< Records since renego request, or with DTLS,
+    int MBEDTLS_PRIVATE(renego_status);          /*!< Initial, in progress, pending?   */
+    int MBEDTLS_PRIVATE(renego_records_seen);    /*!< Records since renego request, or with DTLS,
                                   number of retransmissions of request if
                                   renego_max_records is < 0           */
 #endif /* MBEDTLS_SSL_RENEGOTIATION */
 
-    int major_ver;              /*!< equal to  MBEDTLS_SSL_MAJOR_VERSION_3    */
-    int minor_ver;              /*!< one of MBEDTLS_SSL_MINOR_VERSION_x macros */
-    unsigned badmac_seen;       /*!< records with a bad MAC received    */
+    int MBEDTLS_PRIVATE(major_ver);              /*!< equal to  MBEDTLS_SSL_MAJOR_VERSION_3    */
+
+    /* This field is temporarily duplicated with mbedtls_ssl_context.minor_ver.
+     * Once runtime negotiation of TLS 1.2 and TLS 1.3 is implemented, it needs
+     * to be studied whether one of them can be removed. */
+    int MBEDTLS_PRIVATE(minor_ver);              /*!< one of MBEDTLS_SSL_MINOR_VERSION_x macros */
+    unsigned MBEDTLS_PRIVATE(badmac_seen);       /*!< records with a bad MAC received    */
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     /** Callback to customize X.509 certificate chain verification          */
-    int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *);
-    void *p_vrfy;                   /*!< context for X.509 verify callback */
+    int (*MBEDTLS_PRIVATE(f_vrfy))(void *, mbedtls_x509_crt *, int, uint32_t *);
+    void *MBEDTLS_PRIVATE(p_vrfy);                   /*!< context for X.509 verify callback */
 #endif
 
-    mbedtls_ssl_send_t *f_send; /*!< Callback for network send */
-    mbedtls_ssl_recv_t *f_recv; /*!< Callback for network receive */
-    mbedtls_ssl_recv_timeout_t *f_recv_timeout;
+    mbedtls_ssl_send_t *MBEDTLS_PRIVATE(f_send); /*!< Callback for network send */
+    mbedtls_ssl_recv_t *MBEDTLS_PRIVATE(f_recv); /*!< Callback for network receive */
+    mbedtls_ssl_recv_timeout_t *MBEDTLS_PRIVATE(f_recv_timeout);
                                 /*!< Callback for network receive with timeout */
 
-    void *p_bio;                /*!< context for I/O operations   */
+    void *MBEDTLS_PRIVATE(p_bio);                /*!< context for I/O operations   */
 
     /*
      * Session layer
      */
-    mbedtls_ssl_session *session_in;            /*!<  current session data (in)   */
-    mbedtls_ssl_session *session_out;           /*!<  current session data (out)  */
-    mbedtls_ssl_session *session;               /*!<  negotiated session data     */
-    mbedtls_ssl_session *session_negotiate;     /*!<  session data in negotiation */
+    mbedtls_ssl_session *MBEDTLS_PRIVATE(session_in);            /*!<  current session data (in)   */
+    mbedtls_ssl_session *MBEDTLS_PRIVATE(session_out);           /*!<  current session data (out)  */
+    mbedtls_ssl_session *MBEDTLS_PRIVATE(session);               /*!<  negotiated session data     */
+    mbedtls_ssl_session *MBEDTLS_PRIVATE(session_negotiate);     /*!<  session data in negotiation */
 
-    mbedtls_ssl_handshake_params *handshake;    /*!<  params required only during
+    mbedtls_ssl_handshake_params *MBEDTLS_PRIVATE(handshake);    /*!<  params required only during
                                               the handshake process        */
 
     /*
      * Record layer transformations
      */
-    mbedtls_ssl_transform *transform_in;        /*!<  current transform params (in)   */
-    mbedtls_ssl_transform *transform_out;       /*!<  current transform params (in)   */
-    mbedtls_ssl_transform *transform;           /*!<  negotiated transform params     */
-    mbedtls_ssl_transform *transform_negotiate; /*!<  transform params in negotiation */
+    mbedtls_ssl_transform *MBEDTLS_PRIVATE(transform_in);        /*!<  current transform params (in)
+                                                                  *    This is always a reference,
+                                                                  *    never an owning pointer.        */
+    mbedtls_ssl_transform *MBEDTLS_PRIVATE(transform_out);       /*!<  current transform params (out)
+                                                                  *    This is always a reference,
+                                                                  *    never an owning pointer.        */
+    mbedtls_ssl_transform *MBEDTLS_PRIVATE(transform);           /*!<  negotiated transform params
+                                                                  *    This pointer owns the transform
+                                                                  *    it references.                  */
+    mbedtls_ssl_transform *MBEDTLS_PRIVATE(transform_negotiate); /*!<  transform params in negotiation
+                                                                  *    This pointer owns the transform
+                                                                  *    it references.                  */
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+    /*! The application data transform in TLS 1.3.
+     *  This pointer owns the transform it references. */
+    mbedtls_ssl_transform *MBEDTLS_PRIVATE(transform_application);
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 
     /*
      * Timers
      */
-    void *p_timer;              /*!< context for the timer callbacks */
+    void *MBEDTLS_PRIVATE(p_timer);              /*!< context for the timer callbacks */
 
-    mbedtls_ssl_set_timer_t *f_set_timer;       /*!< set timer callback */
-    mbedtls_ssl_get_timer_t *f_get_timer;       /*!< get timer callback */
+    mbedtls_ssl_set_timer_t *MBEDTLS_PRIVATE(f_set_timer);       /*!< set timer callback */
+    mbedtls_ssl_get_timer_t *MBEDTLS_PRIVATE(f_get_timer);       /*!< get timer callback */
 
     /*
      * Record layer (incoming data)
      */
-    unsigned char *in_buf;      /*!< input buffer                     */
-    unsigned char *in_ctr;      /*!< 64-bit incoming message counter
+    unsigned char *MBEDTLS_PRIVATE(in_buf);      /*!< input buffer                     */
+    unsigned char *MBEDTLS_PRIVATE(in_ctr);      /*!< 64-bit incoming message counter
                                      TLS: maintained by us
                                      DTLS: read from peer             */
-    unsigned char *in_hdr;      /*!< start of record header           */
+    unsigned char *MBEDTLS_PRIVATE(in_hdr);      /*!< start of record header           */
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-    unsigned char *in_cid;      /*!< The start of the CID;
+    unsigned char *MBEDTLS_PRIVATE(in_cid);      /*!< The start of the CID;
                                  *   (the end is marked by in_len).   */
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-    unsigned char *in_len;      /*!< two-bytes message length field   */
-    unsigned char *in_iv;       /*!< ivlen-byte IV                    */
-    unsigned char *in_msg;      /*!< message contents (in_iv+ivlen)   */
-    unsigned char *in_offt;     /*!< read offset in application data  */
+    unsigned char *MBEDTLS_PRIVATE(in_len);      /*!< two-bytes message length field   */
+    unsigned char *MBEDTLS_PRIVATE(in_iv);       /*!< ivlen-byte IV                    */
+    unsigned char *MBEDTLS_PRIVATE(in_msg);      /*!< message contents (in_iv+ivlen)   */
+    unsigned char *MBEDTLS_PRIVATE(in_offt);     /*!< read offset in application data  */
 
-    int in_msgtype;             /*!< record header: message type      */
-    size_t in_msglen;           /*!< record header: message length    */
-    size_t in_left;             /*!< amount of data read so far       */
+    int MBEDTLS_PRIVATE(in_msgtype);             /*!< record header: message type      */
+    size_t MBEDTLS_PRIVATE(in_msglen);           /*!< record header: message length    */
+    size_t MBEDTLS_PRIVATE(in_left);             /*!< amount of data read so far       */
 #if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
-    size_t in_buf_len;          /*!< length of input buffer           */
+    size_t MBEDTLS_PRIVATE(in_buf_len);          /*!< length of input buffer           */
 #endif
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
-    uint16_t in_epoch;          /*!< DTLS epoch for incoming records  */
-    size_t next_record_offset;  /*!< offset of the next record in datagram
+    uint16_t MBEDTLS_PRIVATE(in_epoch);          /*!< DTLS epoch for incoming records  */
+    size_t MBEDTLS_PRIVATE(next_record_offset);  /*!< offset of the next record in datagram
                                      (equal to in_left if none)       */
 #endif /* MBEDTLS_SSL_PROTO_DTLS */
 #if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
-    uint64_t in_window_top;     /*!< last validated record seq_num    */
-    uint64_t in_window;         /*!< bitmask for replay detection     */
+    uint64_t MBEDTLS_PRIVATE(in_window_top);     /*!< last validated record seq_num    */
+    uint64_t MBEDTLS_PRIVATE(in_window);         /*!< bitmask for replay detection     */
 #endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
 
-    size_t in_hslen;            /*!< current handshake message length,
+    size_t MBEDTLS_PRIVATE(in_hslen);            /*!< current handshake message length,
                                      including the handshake header   */
-    int nb_zero;                /*!< # of 0-length encrypted messages */
+    int MBEDTLS_PRIVATE(nb_zero);                /*!< # of 0-length encrypted messages */
 
-    int keep_current_message;   /*!< drop or reuse current message
+    int MBEDTLS_PRIVATE(keep_current_message);   /*!< drop or reuse current message
                                      on next call to record layer? */
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
-    uint8_t disable_datagram_packing;  /*!< Disable packing multiple records
+    uint8_t MBEDTLS_PRIVATE(disable_datagram_packing);  /*!< Disable packing multiple records
                                         *   within a single datagram.  */
 #endif /* MBEDTLS_SSL_PROTO_DTLS */
 
     /*
      * Record layer (outgoing data)
      */
-    unsigned char *out_buf;     /*!< output buffer                    */
-    unsigned char *out_ctr;     /*!< 64-bit outgoing message counter  */
-    unsigned char *out_hdr;     /*!< start of record header           */
+    unsigned char *MBEDTLS_PRIVATE(out_buf);     /*!< output buffer                    */
+    unsigned char *MBEDTLS_PRIVATE(out_ctr);     /*!< 64-bit outgoing message counter  */
+    unsigned char *MBEDTLS_PRIVATE(out_hdr);     /*!< start of record header           */
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-    unsigned char *out_cid;     /*!< The start of the CID;
+    unsigned char *MBEDTLS_PRIVATE(out_cid);     /*!< The start of the CID;
                                  *   (the end is marked by in_len).   */
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-    unsigned char *out_len;     /*!< two-bytes message length field   */
-    unsigned char *out_iv;      /*!< ivlen-byte IV                    */
-    unsigned char *out_msg;     /*!< message contents (out_iv+ivlen)  */
+    unsigned char *MBEDTLS_PRIVATE(out_len);     /*!< two-bytes message length field   */
+    unsigned char *MBEDTLS_PRIVATE(out_iv);      /*!< ivlen-byte IV                    */
+    unsigned char *MBEDTLS_PRIVATE(out_msg);     /*!< message contents (out_iv+ivlen)  */
 
-    int out_msgtype;            /*!< record header: message type      */
-    size_t out_msglen;          /*!< record header: message length    */
-    size_t out_left;            /*!< amount of data not yet written   */
+    int MBEDTLS_PRIVATE(out_msgtype);            /*!< record header: message type      */
+    size_t MBEDTLS_PRIVATE(out_msglen);          /*!< record header: message length    */
+    size_t MBEDTLS_PRIVATE(out_left);            /*!< amount of data not yet written   */
 #if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
-    size_t out_buf_len;         /*!< length of output buffer          */
+    size_t MBEDTLS_PRIVATE(out_buf_len);         /*!< length of output buffer          */
 #endif
 
-    unsigned char cur_out_ctr[8]; /*!<  Outgoing record sequence  number. */
+    unsigned char MBEDTLS_PRIVATE(cur_out_ctr)[8]; /*!<  Outgoing record sequence  number. */
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
-    uint16_t mtu;               /*!< path mtu, used to fragment outgoing messages */
+    uint16_t MBEDTLS_PRIVATE(mtu);               /*!< path mtu, used to fragment outgoing messages */
 #endif /* MBEDTLS_SSL_PROTO_DTLS */
 
     /*
      * PKI layer
      */
-    int client_auth;                    /*!<  flag for client auth.   */
+    int MBEDTLS_PRIVATE(client_auth);                    /*!<  flag for client auth.   */
 
     /*
      * User settings
      */
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
-    char *hostname;             /*!< expected peer CN for verification
+    char *MBEDTLS_PRIVATE(hostname);             /*!< expected peer CN for verification
                                      (and SNI if available)                 */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
 #if defined(MBEDTLS_SSL_ALPN)
-    const char *alpn_chosen;    /*!<  negotiated protocol                   */
+    const char *MBEDTLS_PRIVATE(alpn_chosen);    /*!<  negotiated protocol                   */
 #endif /* MBEDTLS_SSL_ALPN */
 
 #if defined(MBEDTLS_SSL_DTLS_SRTP)
     /*
      * use_srtp extension
      */
-    mbedtls_dtls_srtp_info dtls_srtp_info;
+    mbedtls_dtls_srtp_info MBEDTLS_PRIVATE(dtls_srtp_info);
 #endif /* MBEDTLS_SSL_DTLS_SRTP */
 
     /*
      * Information for DTLS hello verify
      */
 #if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
-    unsigned char  *cli_id;         /*!<  transport-level ID of the client  */
-    size_t          cli_id_len;     /*!<  length of cli_id                  */
+    unsigned char  *MBEDTLS_PRIVATE(cli_id);         /*!<  transport-level ID of the client  */
+    size_t          MBEDTLS_PRIVATE(cli_id_len);     /*!<  length of cli_id                  */
 #endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */
 
     /*
      * Secure renegotiation
      */
     /* needed to know when to send extension on server */
-    int secure_renegotiation;           /*!<  does peer support legacy or
+    int MBEDTLS_PRIVATE(secure_renegotiation);           /*!<  does peer support legacy or
                                               secure renegotiation           */
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
-    size_t verify_data_len;             /*!<  length of verify data stored   */
-    char own_verify_data[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /*!<  previous handshake verify data */
-    char peer_verify_data[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /*!<  previous handshake verify data */
+    size_t MBEDTLS_PRIVATE(verify_data_len);             /*!<  length of verify data stored   */
+    char MBEDTLS_PRIVATE(own_verify_data)[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /*!<  previous handshake verify data */
+    char MBEDTLS_PRIVATE(peer_verify_data)[MBEDTLS_SSL_VERIFY_DATA_MAX_LEN]; /*!<  previous handshake verify data */
 #endif /* MBEDTLS_SSL_RENEGOTIATION */
 
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
@@ -1389,13 +1578,19 @@
      *  all subsequent handshakes. This may be different from the
      *  CID currently used in case the user has re-configured the CID
      *  after an initial handshake. */
-    unsigned char own_cid[ MBEDTLS_SSL_CID_IN_LEN_MAX ];
-    uint8_t own_cid_len;   /*!< The length of \c own_cid. */
-    uint8_t negotiate_cid; /*!< This indicates whether the CID extension should
+    unsigned char MBEDTLS_PRIVATE(own_cid)[ MBEDTLS_SSL_CID_IN_LEN_MAX ];
+    uint8_t MBEDTLS_PRIVATE(own_cid_len);   /*!< The length of \c own_cid. */
+    uint8_t MBEDTLS_PRIVATE(negotiate_cid); /*!< This indicates whether the CID extension should
                             *   be negotiated in the next handshake or not.
                             *   Possible values are #MBEDTLS_SSL_CID_ENABLED
                             *   and #MBEDTLS_SSL_CID_DISABLED. */
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
+
+#if defined(MBEDTLS_SSL_EXPORT_KEYS)
+    /** Callback to export key block and master secret                      */
+    mbedtls_ssl_export_keys_t *MBEDTLS_PRIVATE(f_export_keys);
+    void *MBEDTLS_PRIVATE(p_export_keys);            /*!< context for key export callback    */
+#endif
 };
 
 /**
@@ -1538,7 +1733,7 @@
  * \brief          Set the random number generator callback
  *
  * \param conf     SSL configuration
- * \param f_rng    RNG function
+ * \param f_rng    RNG function (mandatory)
  * \param p_rng    RNG parameter
  */
 void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
@@ -1919,70 +2114,6 @@
                                         size_t *tlen,
                                         uint32_t *lifetime );
 
-#if defined(MBEDTLS_SSL_EXPORT_KEYS)
-/**
- * \brief           Callback type: Export key block and master secret
- *
- * \note            This is required for certain uses of TLS, e.g. EAP-TLS
- *                  (RFC 5216) and Thread. The key pointers are ephemeral and
- *                  therefore must not be stored. The master secret and keys
- *                  should not be used directly except as an input to a key
- *                  derivation function.
- *
- * \param p_expkey  Context for the callback
- * \param ms        Pointer to master secret (fixed length: 48 bytes)
- * \param kb        Pointer to key block, see RFC 5246 section 6.3
- *                  (variable length: 2 * maclen + 2 * keylen + 2 * ivlen).
- * \param maclen    MAC length
- * \param keylen    Key length
- * \param ivlen     IV length
- *
- * \return          0 if successful, or
- *                  a specific MBEDTLS_ERR_XXX code.
- */
-typedef int mbedtls_ssl_export_keys_t( void *p_expkey,
-                                const unsigned char *ms,
-                                const unsigned char *kb,
-                                size_t maclen,
-                                size_t keylen,
-                                size_t ivlen );
-
-/**
- * \brief           Callback type: Export key block, master secret,
- *                                 handshake randbytes and the tls_prf function
- *                                 used to derive keys.
- *
- * \note            This is required for certain uses of TLS, e.g. EAP-TLS
- *                  (RFC 5216) and Thread. The key pointers are ephemeral and
- *                  therefore must not be stored. The master secret and keys
- *                  should not be used directly except as an input to a key
- *                  derivation function.
- *
- * \param p_expkey  Context for the callback.
- * \param ms        Pointer to master secret (fixed length: 48 bytes).
- * \param kb            Pointer to key block, see RFC 5246 section 6.3.
- *                      (variable length: 2 * maclen + 2 * keylen + 2 * ivlen).
- * \param maclen        MAC length.
- * \param keylen        Key length.
- * \param ivlen         IV length.
- * \param client_random The client random bytes.
- * \param server_random The server random bytes.
- * \param tls_prf_type The tls_prf enum type.
- *
- * \return          0 if successful, or
- *                  a specific MBEDTLS_ERR_XXX code.
- */
-typedef int mbedtls_ssl_export_keys_ext_t( void *p_expkey,
-                                           const unsigned char *ms,
-                                           const unsigned char *kb,
-                                           size_t maclen,
-                                           size_t keylen,
-                                           size_t ivlen,
-                                           const unsigned char client_random[32],
-                                           const unsigned char server_random[32],
-                                           mbedtls_tls_prf_types tls_prf_type );
-#endif /* MBEDTLS_SSL_EXPORT_KEYS */
-
 /**
  * \brief           Callback type: parse and load session ticket
  *
@@ -2034,34 +2165,26 @@
 
 #if defined(MBEDTLS_SSL_EXPORT_KEYS)
 /**
- * \brief           Configure key export callback.
- *                  (Default: none.)
+ * \brief   Configure a key export callback.
+ *          (Default: none.)
  *
- * \note            See \c mbedtls_ssl_export_keys_t.
+ *          This API can be used for two purposes:
+ *          - Debugging: Use this API to e.g. generate an NSSKeylog
+ *            file and use it to inspect encrypted traffic in tools
+ *            such as Wireshark.
+ *          - Application-specific export: Use this API to implement
+ *            key exporters, e.g. for EAP-TLS or DTLS-SRTP.
  *
- * \param conf      SSL configuration context
- * \param f_export_keys     Callback for exporting keys
- * \param p_export_keys     Context for the callback
+ *
+ * \param ssl            The SSL context to which the export
+ *                       callback should be attached.
+ * \param f_export_keys  The callback for the key export.
+ * \param p_export_keys  The opaque context pointer to be passed to the
+ *                       callback \p f_export_keys.
  */
-void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
-        mbedtls_ssl_export_keys_t *f_export_keys,
-        void *p_export_keys );
-
-/**
- * \brief           Configure extended key export callback.
- *                  (Default: none.)
- *
- * \note            See \c mbedtls_ssl_export_keys_ext_t.
- * \warning         Exported key material must not be used for any purpose
- *                  before the (D)TLS handshake is completed
- *
- * \param conf      SSL configuration context
- * \param f_export_keys_ext Callback for exporting keys
- * \param p_export_keys     Context for the callback
- */
-void mbedtls_ssl_conf_export_keys_ext_cb( mbedtls_ssl_config *conf,
-        mbedtls_ssl_export_keys_ext_t *f_export_keys_ext,
-        void *p_export_keys );
+void mbedtls_ssl_set_export_keys_cb( mbedtls_ssl_context *ssl,
+                                     mbedtls_ssl_export_keys_t *f_export_keys,
+                                     void *p_export_keys );
 #endif /* MBEDTLS_SSL_EXPORT_KEYS */
 
 #if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
@@ -2394,18 +2517,49 @@
 
 #if defined(MBEDTLS_SSL_CLI_C)
 /**
- * \brief          Request resumption of session (client-side only)
- *                 Session data is copied from presented session structure.
+ * \brief          Load a session for session resumption.
  *
- * \param ssl      SSL context
- * \param session  session context
+ *                 Sessions loaded through this call will be considered
+ *                 for session resumption in the next handshake.
  *
- * \return         0 if successful,
- *                 MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed,
- *                 MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used server-side or
- *                 arguments are otherwise invalid
+ * \note           Even if this call succeeds, it is not guaranteed that
+ *                 the next handshake will indeed be shortened through the
+ *                 use of session resumption: The server is always free
+ *                 to reject any attempt for resumption and fall back to
+ *                 a full handshake.
+ *
+ * \note           This function can handle a variety of mechanisms for session
+ *                 resumption: For TLS 1.2, both session ID-based resumption and
+ *                 ticket-based resumption will be considered. For TLS 1.3,
+ *                 once implemented, sessions equate to tickets, and loading
+ *                 one or more sessions via this call will lead to their
+ *                 corresponding tickets being advertised as resumption PSKs
+ *                 by the client.
+ *
+ * \note           Calling this function multiple times will only be useful
+ *                 once TLS 1.3 is supported. For TLS 1.2 connections, this
+ *                 function should be called at most once.
+ *
+ * \param ssl      The SSL context representing the connection which should
+ *                 be attempted to be setup using session resumption. This
+ *                 must be initialized via mbedtls_ssl_init() and bound to
+ *                 an SSL configuration via mbedtls_ssl_setup(), but
+ *                 the handshake must not yet have been started.
+ * \param session  The session to be considered for session resumption.
+ *                 This must be a session previously exported via
+ *                 mbedtls_ssl_get_session(), and potentially serialized and
+ *                 deserialized through mbedtls_ssl_session_save() and
+ *                 mbedtls_ssl_session_load() in the meantime.
+ *
+ * \return         \c 0 if successful.
+ * \return         \c MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE if the session
+ *                 could not be loaded because of an implementation limitation.
+ *                 This error is non-fatal, and has no observable effect on
+ *                 the SSL context or the session that was attempted to be loaded.
+ * \return         Another negative error code on other kinds of failure.
  *
  * \sa             mbedtls_ssl_get_session()
+ * \sa             mbedtls_ssl_session_load()
  */
 int mbedtls_ssl_set_session( mbedtls_ssl_context *ssl, const mbedtls_ssl_session *session );
 #endif /* MBEDTLS_SSL_CLI_C */
@@ -2454,7 +2608,6 @@
  *                 of session cache or session tickets.
  *
  * \see            mbedtls_ssl_session_load()
- * \see            mbedtls_ssl_get_session_pointer()
  *
  * \param session  The session structure to be saved.
  * \param buf      The buffer to write the serialized data to. It must be a
@@ -2478,50 +2631,95 @@
                               size_t *olen );
 
 /**
- * \brief          Get a pointer to the current session structure, for example
- *                 to serialize it.
- *
- * \warning        Ownership of the session remains with the SSL context, and
- *                 the returned pointer is only guaranteed to be valid until
- *                 the next API call operating on the same \p ssl context.
- *
- * \see            mbedtls_ssl_session_save()
- *
- * \param ssl      The SSL context.
- *
- * \return         A pointer to the current session if successful.
- * \return         \c NULL if no session is active.
- */
-const mbedtls_ssl_session *mbedtls_ssl_get_session_pointer( const mbedtls_ssl_context *ssl );
-
-/**
  * \brief               Set the list of allowed ciphersuites and the preference
  *                      order. First in the list has the highest preference.
- *                      (Overrides all version-specific lists)
  *
- *                      The ciphersuites array is not copied, and must remain
- *                      valid for the lifetime of the ssl_config.
+ *                      For TLS 1.2, the notion of ciphersuite determines both
+ *                      the key exchange mechanism and the suite of symmetric
+ *                      algorithms to be used during and after the handshake.
  *
- *                      Note: The server uses its own preferences
- *                      over the preference of the client unless
- *                      MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE is defined!
+ *                      For TLS 1.3 (in development), the notion of ciphersuite
+ *                      only determines the suite of symmetric algorithms to be
+ *                      used during and after the handshake, while key exchange
+ *                      mechanisms are configured separately.
  *
- * \param conf          SSL configuration
- * \param ciphersuites  0-terminated list of allowed ciphersuites
+ *                      In Mbed TLS, ciphersuites for both TLS 1.2 and TLS 1.3
+ *                      are configured via this function. For users of TLS 1.3,
+ *                      there will be separate API for the configuration of key
+ *                      exchange mechanisms.
+ *
+ *                      The list of ciphersuites passed to this function may
+ *                      contain a mixture of TLS 1.2 and TLS 1.3 ciphersuite
+ *                      identifiers. This is useful if negotiation of TLS 1.3
+ *                      should be attempted, but a fallback to TLS 1.2 would
+ *                      be tolerated.
+ *
+ * \note                By default, the server chooses its preferred
+ *                      ciphersuite among those that the client supports. If
+ *                      mbedtls_ssl_conf_preference_order() is called to prefer
+ *                      the client's preferences, the server instead chooses
+ *                      the client's preferred ciphersuite among those that
+ *                      the server supports.
+ *
+ * \warning             The ciphersuites array \p ciphersuites is not copied.
+ *                      It must remain valid for the lifetime of the SSL
+ *                      configuration \p conf.
+ *
+ * \param conf          The SSL configuration to modify.
+ * \param ciphersuites  A 0-terminated list of IANA identifiers of supported
+ *                      ciphersuites, accessible through \c MBEDTLS_TLS_XXX
+ *                      and \c MBEDTLS_TLS1_3_XXX macros defined in
+ *                      ssl_ciphersuites.h.
  */
 void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
-                                   const int *ciphersuites );
+                                    const int *ciphersuites );
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
 /**
- * \brief               Get ciphersuite for given protocol's minor version.
+ * \brief Set the supported key exchange modes for TLS 1.3 connections.
  *
- * \param conf          The SSL configuration.
- * \param prot_version  Protocol version. One of MBEDTLS_SSL_MINOR_VERSION_x macros.
- * \return              Ciphersuites pointer if successful.
- * \return              \c NULL if no ciphersuites where found.
+ *        In contrast to TLS 1.2, the ciphersuite concept in TLS 1.3 does not
+ *        include the choice of key exchange mechanism. It is therefore not
+ *        covered by the API mbedtls_ssl_conf_ciphersuites(). See the
+ *        documentation of mbedtls_ssl_conf_ciphersuites() for more
+ *        information on the ciphersuite concept in TLS 1.2 and TLS 1.3.
+ *
+ *        The present function is specific to TLS 1.3 and allows users to
+ *        configure the set of supported key exchange mechanisms in TLS 1.3.
+ *
+ * \param conf       The SSL configuration the change should apply to.
+ * \param kex_modes  A bitwise combination of one or more of the following:
+ *                   - MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK
+ *                     This flag enables pure-PSK key exchanges.
+ *                   - MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_EPHEMERAL
+ *                     This flag enables combined PSK-ephemeral key exchanges.
+ *                   - MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_EPHEMERAL
+ *                     This flag enables pure-ephemeral key exchanges.
+ *                   For convenience, the following pre-defined macros are
+ *                   available for combinations of the above:
+ *                   - MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_ALL
+ *                     Includes all of pure-PSK, PSK-ephemeral and pure-ephemeral.
+ *                   - MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_PSK_ALL
+ *                     Includes both pure-PSK and combined PSK-ephemeral
+ *                     key exchanges, but excludes pure-ephemeral key exchanges.
+ *                   - MBEDTLS_SSL_TLS13_KEY_EXCHANGE_MODE_EPHEMERAL_ALL
+ *                     Includes both pure-ephemeral and combined PSK-ephemeral
+ *                     key exchanges.
+ *
+ * \note  If a PSK-based key exchange mode shall be supported, applications
+ *        must also use the APIs mbedtls_ssl_conf_psk() or
+ *        mbedtls_ssl_conf_psk_cb() or mbedtls_ssl_conf_psk_opaque()
+ *        to configure the PSKs to be used.
+ *
+ * \note  If a pure-ephemeral key exchange mode shall be supported,
+ *        server-side applications must also provide a certificate via
+ *        mbedtls_ssl_conf_own_cert().
+ *
  */
-const int *mbedtls_ssl_get_protocol_version_ciphersuites(
-    const mbedtls_ssl_config *conf, int prot_version );
+
+void mbedtls_ssl_conf_tls13_key_exchange_modes( mbedtls_ssl_config* conf,
+                                                const int kex_modes );
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 
 #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
 #define MBEDTLS_SSL_UNEXPECTED_CID_IGNORE 0
@@ -2562,27 +2760,6 @@
                           int ignore_other_cids );
 #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
 
-/**
- * \brief               Set the list of allowed ciphersuites and the
- *                      preference order for a specific version of the protocol.
- *                      (Only useful on the server side)
- *
- *                      The ciphersuites array is not copied, and must remain
- *                      valid for the lifetime of the ssl_config.
- *
- * \param conf          SSL configuration
- * \param ciphersuites  0-terminated list of allowed ciphersuites
- * \param major         Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3
- *                      supported)
- * \param minor         Minor version number (only MBEDTLS_SSL_MINOR_VERSION_3
- *                      supported)
- *
- * \note                With DTLS, use MBEDTLS_SSL_MINOR_VERSION_3 for DTLS 1.2
- */
-void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
-                                       const int *ciphersuites,
-                                       int major, int minor );
-
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 /**
  * \brief          Set the X.509 security profile used for verification
@@ -2925,7 +3102,6 @@
 #if defined(MBEDTLS_ECP_C)
 /**
  * \brief          Set the allowed curves in order of preference.
- *                 (Default: all defined curves.)
  *
  *                 On server: this only affects selection of the ECDHE curve;
  *                 the curves used for ECDH and ECDSA are determined by the
@@ -2946,6 +3122,19 @@
  * \note           This list should be ordered by decreasing preference
  *                 (preferred curve first).
  *
+ * \note           The default list is the same set of curves that
+ *                 #mbedtls_x509_crt_profile_default allows, plus
+ *                 ECDHE-only curves selected according to the same criteria.
+ *                 The order favors curves with the lowest resource usage.
+ *
+ * \note           New minor versions of Mbed TLS may extend this list,
+ *                 for example if new curves are added to the library.
+ *                 New minor versions of Mbed TLS will not remove items
+ *                 from this list unless serious security concerns require it.
+ *                 New minor versions of Mbed TLS may change the order in
+ *                 keeping with the general principle of favoring the lowest
+ *                 resource usage.
+ *
  * \param conf     SSL configuration
  * \param curves   Ordered list of allowed curves,
  *                 terminated by MBEDTLS_ECP_DP_NONE.
@@ -2957,7 +3146,6 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
 /**
  * \brief          Set the allowed hashes for signatures during the handshake.
- *                 (Default: all available hashes except MD5.)
  *
  * \note           This only affects which hashes are offered and can be used
  *                 for signatures during the handshake. Hashes for message
@@ -2969,12 +3157,38 @@
  * \note           This list should be ordered by decreasing preference
  *                 (preferred hash first).
  *
+ * \note           By default, all supported hashes whose length is at least
+ *                 256 bits are allowed. This is the same set as the default
+ *                 for certificate verification
+ *                 (#mbedtls_x509_crt_profile_default).
+ *                 The preference order is currently unspecified and may
+ *                 change in future versions.
+ *
+ * \note           New minor versions of Mbed TLS may extend this list,
+ *                 for example if new curves are added to the library.
+ *                 New minor versions of Mbed TLS will not remove items
+ *                 from this list unless serious security concerns require it.
+ *
  * \param conf     SSL configuration
  * \param hashes   Ordered list of allowed signature hashes,
  *                 terminated by \c MBEDTLS_MD_NONE.
  */
 void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
                                   const int *hashes );
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+/**
+ * \brief          Configure allowed signature algorithms for use in TLS 1.3
+ *
+ * \param conf     The SSL configuration to use.
+ * \param sig_algs List of allowed IANA values for TLS 1.3 signature algorithms,
+ *                 terminated by \c MBEDTLS_TLS13_SIG_NONE. The list must remain
+ *                 available throughout the lifetime of the conf object. Supported
+ *                 values are available as \c MBEDTLS_TLS13_SIG_XXXX
+ */
+void mbedtls_ssl_conf_sig_algs( mbedtls_ssl_config *conf,
+                                const uint16_t* sig_algs );
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
 #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
@@ -3233,8 +3447,7 @@
  *
  * \param conf     SSL configuration
  * \param major    Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3 supported)
- * \param minor    Minor version number (MBEDTLS_SSL_MINOR_VERSION_1 and MBEDTLS_SSL_MINOR_VERSION_2,
- *                 MBEDTLS_SSL_MINOR_VERSION_3 supported)
+ * \param minor    Minor version number (only MBEDTLS_SSL_MINOR_VERSION_3 supported)
  */
 void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor );
 
@@ -3249,9 +3462,7 @@
  *
  * \param conf     SSL configuration
  * \param major    Major version number (only MBEDTLS_SSL_MAJOR_VERSION_3 supported)
- * \param minor    Minor version number (MBEDTLS_SSL_MINOR_VERSION_1,
- *                 MBEDTLS_SSL_MINOR_VERSION_2,
- *                 MBEDTLS_SSL_MINOR_VERSION_3 supported)
+ * \param minor    Minor version number (only MBEDTLS_SSL_MINOR_VERSION_3 supported)
  */
 void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor );
 
@@ -3337,17 +3548,18 @@
 int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code );
 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
 
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
+#if defined(MBEDTLS_SSL_SRV_C)
 /**
- * \brief          Activate negotiation of truncated HMAC
- *                 (Default: MBEDTLS_SSL_TRUNC_HMAC_DISABLED)
+ * \brief          Pick the ciphersuites order according to the second parameter
+ *                 in the SSL Server module (MBEDTLS_SSL_SRV_C).
+ *                 (Default, if never called: MBEDTLS_SSL_SRV_CIPHERSUITE_ORDER_SERVER)
  *
  * \param conf     SSL configuration
- * \param truncate Enable or disable (MBEDTLS_SSL_TRUNC_HMAC_ENABLED or
- *                                    MBEDTLS_SSL_TRUNC_HMAC_DISABLED)
+ * \param order    Server or client (MBEDTLS_SSL_SRV_CIPHERSUITE_ORDER_SERVER
+ *                                or MBEDTLS_SSL_SRV_CIPHERSUITE_ORDER_CLIENT)
  */
-void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate );
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
+void mbedtls_ssl_conf_preference_order( mbedtls_ssl_config *conf, int order );
+#endif /* MBEDTLS_SSL_SRV_C */
 
 #if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
 /**
@@ -3581,45 +3793,15 @@
  */
 int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl );
 
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-/**
- * \brief          Return the maximum fragment length (payload, in bytes) for
- *                 the output buffer. For the client, this is the configured
- *                 value. For the server, it is the minimum of two - the
- *                 configured value and the negotiated one.
- *
- * \sa             mbedtls_ssl_conf_max_frag_len()
- * \sa             mbedtls_ssl_get_max_record_payload()
- *
- * \param ssl      SSL context
- *
- * \return         Current maximum fragment length for the output buffer.
- */
-size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl );
-
-/**
- * \brief          Return the maximum fragment length (payload, in bytes) for
- *                 the input buffer. This is the negotiated maximum fragment
- *                 length, or, if there is none, MBEDTLS_SSL_IN_CONTENT_LEN.
- *                 If it is not defined either, the value is 2^14. This function
- *                 works as its predecessor, \c mbedtls_ssl_get_max_frag_len().
- *
- * \sa             mbedtls_ssl_conf_max_frag_len()
- * \sa             mbedtls_ssl_get_max_record_payload()
- *
- * \param ssl      SSL context
- *
- * \return         Current maximum fragment length for the output buffer.
- */
-size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl );
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
 /**
  * \brief          Return the current maximum outgoing record payload in bytes.
- *                 This takes into account the config.h setting \c
- *                 MBEDTLS_SSL_OUT_CONTENT_LEN, the configured and negotiated
- *                 max fragment length extension if used, and for DTLS the
- *                 path MTU as configured and current record expansion.
+ *
+ * \note           The logic to determine the maximum outgoing record payload is
+ *                 version-specific. It takes into account various factors, such as
+ *                 the mbedtls_config.h setting \c MBEDTLS_SSL_OUT_CONTENT_LEN, extensions
+ *                 such as the max fragment length or record size limit extension if
+ *                 used, and for DTLS the path MTU as configured and current
+ *                 record expansion.
  *
  * \note           With DTLS, \c mbedtls_ssl_write() will return an error if
  *                 called with a larger length value.
@@ -3628,9 +3810,7 @@
  *                 to the caller to call \c mbedtls_ssl_write() again in
  *                 order to send the remaining bytes if any.
  *
- * \sa             mbedtls_ssl_set_mtu()
- * \sa             mbedtls_ssl_get_output_max_frag_len()
- * \sa             mbedtls_ssl_get_input_max_frag_len()
+ * \sa             mbedtls_ssl_get_max_out_record_payload()
  * \sa             mbedtls_ssl_get_record_expansion()
  *
  * \param ssl      SSL context
@@ -3640,6 +3820,26 @@
  */
 int mbedtls_ssl_get_max_out_record_payload( const mbedtls_ssl_context *ssl );
 
+/**
+ * \brief          Return the current maximum incoming record payload in bytes.
+ *
+ * \note           The logic to determine the maximum outgoing record payload is
+ *                 version-specific. It takes into account various factors, such as
+ *                 the mbedtls_config.h setting \c MBEDTLS_SSL_IN_CONTENT_LEN, extensions
+ *                 such as the max fragment length extension or record size limit
+ *                 extension if used, and the current record expansion.
+ *
+ * \sa             mbedtls_ssl_set_mtu()
+ * \sa             mbedtls_ssl_get_max_in_record_payload()
+ * \sa             mbedtls_ssl_get_record_expansion()
+ *
+ * \param ssl      SSL context
+ *
+ * \return         Current maximum payload for an outgoing record,
+ *                 or a negative error code.
+ */
+int mbedtls_ssl_get_max_in_record_payload( const mbedtls_ssl_context *ssl );
+
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 /**
  * \brief          Return the peer certificate from the current connection.
@@ -3676,32 +3876,41 @@
 
 #if defined(MBEDTLS_SSL_CLI_C)
 /**
- * \brief          Save session in order to resume it later (client-side only)
- *                 Session data is copied to presented session structure.
+ * \brief          Export a session in order to resume it later.
  *
+ * \param ssl      The SSL context representing the connection for which to
+ *                 to export a session structure for later resumption.
+ * \param session  The target structure in which to store the exported session.
+ *                 This must have been initialized with mbedtls_ssl_init_session()
+ *                 but otherwise be unused.
  *
- * \param ssl      SSL context
- * \param session  session context
+ * \note           This function can handle a variety of mechanisms for session
+ *                 resumption: For TLS 1.2, both session ID-based resumption and
+ *                 ticket-based resumption will be considered. For TLS 1.3,
+ *                 once implemented, sessions equate to tickets, and calling
+ *                 this function multiple times will export the available
+ *                 tickets one a time until no further tickets are available,
+ *                 in which case MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE will
+ *                 be returned.
  *
- * \return         0 if successful,
- *                 MBEDTLS_ERR_SSL_ALLOC_FAILED if memory allocation failed,
- *                 MBEDTLS_ERR_SSL_BAD_INPUT_DATA if used server-side or
- *                 arguments are otherwise invalid.
+ * \note           Calling this function multiple times will only be useful
+ *                 once TLS 1.3 is supported. For TLS 1.2 connections, this
+ *                 function should be called at most once.
  *
- * \note           Only the server certificate is copied, and not the full chain,
- *                 so you should not attempt to validate the certificate again
- *                 by calling \c mbedtls_x509_crt_verify() on it.
- *                 Instead, you should use the results from the verification
- *                 in the original handshake by calling \c mbedtls_ssl_get_verify_result()
- *                 after loading the session again into a new SSL context
- *                 using \c mbedtls_ssl_set_session().
- *
- * \note           Once the session object is not needed anymore, you should
- *                 free it by calling \c mbedtls_ssl_session_free().
+ * \return         \c 0 if successful. In this case, \p session can be used for
+ *                 session resumption by passing it to mbedtls_ssl_set_session(),
+ *                 and serialized for storage via mbedtls_ssl_session_save().
+ * \return         #MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE if no further session
+ *                 is available for export.
+ *                 This error is a non-fatal, and has no observable effect on
+ *                 the SSL context or the destination session.
+ * \return         Another negative error code on other kinds of failure.
  *
  * \sa             mbedtls_ssl_set_session()
+ * \sa             mbedtls_ssl_session_save()
  */
-int mbedtls_ssl_get_session( const mbedtls_ssl_context *ssl, mbedtls_ssl_session *session );
+int mbedtls_ssl_get_session( const mbedtls_ssl_context *ssl,
+                             mbedtls_ssl_session *session );
 #endif /* MBEDTLS_SSL_CLI_C */
 
 /**
@@ -3938,7 +4147,7 @@
  *                 or negotiated with the peer), then:
  *                 - with TLS, less bytes than requested are written.
  *                 - with DTLS, MBEDTLS_ERR_SSL_BAD_INPUT_DATA is returned.
- *                 \c mbedtls_ssl_get_output_max_frag_len() may be used to
+ *                 \c mbedtls_ssl_get_max_out_record_payload() may be used to
  *                 query the active maximum fragment length.
  *
  * \note           Attempting to write 0 bytes will result in an empty TLS
diff --git a/include/mbedtls/ssl_cache.h b/include/mbedtls/ssl_cache.h
index ac7b77c..6a81ac9 100644
--- a/include/mbedtls/ssl_cache.h
+++ b/include/mbedtls/ssl_cache.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_SSL_CACHE_H
 #define MBEDTLS_SSL_CACHE_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ssl.h"
 
@@ -38,7 +35,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
@@ -65,16 +62,16 @@
 struct mbedtls_ssl_cache_entry
 {
 #if defined(MBEDTLS_HAVE_TIME)
-    mbedtls_time_t timestamp;           /*!< entry timestamp    */
+    mbedtls_time_t MBEDTLS_PRIVATE(timestamp);           /*!< entry timestamp    */
 #endif
 
-    unsigned char session_id[32];       /*!< session ID         */
-    size_t session_id_len;
+    unsigned char MBEDTLS_PRIVATE(session_id)[32];       /*!< session ID         */
+    size_t MBEDTLS_PRIVATE(session_id_len);
 
-    unsigned char *session;             /*!< serialized session */
-    size_t session_len;
+    unsigned char *MBEDTLS_PRIVATE(session);             /*!< serialized session */
+    size_t MBEDTLS_PRIVATE(session_len);
 
-    mbedtls_ssl_cache_entry *next;      /*!< chain pointer      */
+    mbedtls_ssl_cache_entry *MBEDTLS_PRIVATE(next);      /*!< chain pointer      */
 };
 
 /**
@@ -82,11 +79,11 @@
  */
 struct mbedtls_ssl_cache_context
 {
-    mbedtls_ssl_cache_entry *chain;     /*!< start of the chain     */
-    int timeout;                /*!< cache entry timeout    */
-    int max_entries;            /*!< maximum entries        */
+    mbedtls_ssl_cache_entry *MBEDTLS_PRIVATE(chain);     /*!< start of the chain     */
+    int MBEDTLS_PRIVATE(timeout);                /*!< cache entry timeout    */
+    int MBEDTLS_PRIVATE(max_entries);            /*!< maximum entries        */
 #if defined(MBEDTLS_THREADING_C)
-    mbedtls_threading_mutex_t mutex;    /*!< mutex                  */
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);    /*!< mutex                  */
 #endif
 };
 
diff --git a/include/mbedtls/ssl_ciphersuites.h b/include/mbedtls/ssl_ciphersuites.h
index 3eacfb5..18e7c98 100644
--- a/include/mbedtls/ssl_ciphersuites.h
+++ b/include/mbedtls/ssl_ciphersuites.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_SSL_CIPHERSUITES_H
 #define MBEDTLS_SSL_CIPHERSUITES_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/pk.h"
 #include "mbedtls/cipher.h"
@@ -42,10 +39,6 @@
 #define MBEDTLS_TLS_RSA_WITH_NULL_MD5                    0x01   /**< Weak! */
 #define MBEDTLS_TLS_RSA_WITH_NULL_SHA                    0x02   /**< Weak! */
 
-#define MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA            0x0A
-
-#define MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA        0x16
-
 #define MBEDTLS_TLS_PSK_WITH_NULL_SHA                    0x2C   /**< Weak! */
 #define MBEDTLS_TLS_DHE_PSK_WITH_NULL_SHA                0x2D   /**< Weak! */
 #define MBEDTLS_TLS_RSA_PSK_WITH_NULL_SHA                0x2E   /**< Weak! */
@@ -68,15 +61,12 @@
 #define MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA        0x84
 #define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA    0x88
 
-#define MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA            0x8B
 #define MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA             0x8C
 #define MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA             0x8D
 
-#define MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA        0x8F
 #define MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA         0x90
 #define MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA         0x91
 
-#define MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA        0x93
 #define MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA         0x94
 #define MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA         0x95
 
@@ -114,22 +104,18 @@
 #define MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 0xC4   /**< TLS 1.2 */
 
 #define MBEDTLS_TLS_ECDH_ECDSA_WITH_NULL_SHA             0xC001 /**< Weak! */
-#define MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA     0xC003
 #define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA      0xC004
 #define MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA      0xC005
 
 #define MBEDTLS_TLS_ECDHE_ECDSA_WITH_NULL_SHA            0xC006 /**< Weak! */
-#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA    0xC008
 #define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA     0xC009
 #define MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA     0xC00A
 
 #define MBEDTLS_TLS_ECDH_RSA_WITH_NULL_SHA               0xC00B /**< Weak! */
-#define MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA       0xC00D
 #define MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA        0xC00E
 #define MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA        0xC00F
 
 #define MBEDTLS_TLS_ECDHE_RSA_WITH_NULL_SHA              0xC010 /**< Weak! */
-#define MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA      0xC012
 #define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA       0xC013
 #define MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA       0xC014
 
@@ -151,7 +137,6 @@
 #define MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256     0xC031 /**< TLS 1.2 */
 #define MBEDTLS_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384     0xC032 /**< TLS 1.2 */
 
-#define MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA      0xC034
 #define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA       0xC035
 #define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA       0xC036
 #define MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256    0xC037
@@ -271,6 +256,13 @@
 #define MBEDTLS_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256     0xCCAD /**< TLS 1.2 */
 #define MBEDTLS_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256     0xCCAE /**< TLS 1.2 */
 
+/* RFC 8446, Appendix B.4 */
+#define MBEDTLS_TLS1_3_AES_128_GCM_SHA256                     0x1301 /**< TLS 1.3 */
+#define MBEDTLS_TLS1_3_AES_256_GCM_SHA384                     0x1302 /**< TLS 1.3 */
+#define MBEDTLS_TLS1_3_CHACHA20_POLY1305_SHA256               0x1303 /**< TLS 1.3 */
+#define MBEDTLS_TLS1_3_AES_128_CCM_SHA256                     0x1304 /**< TLS 1.3 */
+#define MBEDTLS_TLS1_3_AES_128_CCM_8_SHA256                   0x1305 /**< TLS 1.3 */
+
 /* Reminder: update mbedtls_ssl_premaster_secret when adding a new key exchange.
  * Reminder: update MBEDTLS_KEY_EXCHANGE__xxx below
  */
@@ -374,19 +366,19 @@
  */
 struct mbedtls_ssl_ciphersuite_t
 {
-    int id;
-    const char * name;
+    int MBEDTLS_PRIVATE(id);
+    const char * MBEDTLS_PRIVATE(name);
 
-    mbedtls_cipher_type_t cipher;
-    mbedtls_md_type_t mac;
-    mbedtls_key_exchange_type_t key_exchange;
+    mbedtls_cipher_type_t MBEDTLS_PRIVATE(cipher);
+    mbedtls_md_type_t MBEDTLS_PRIVATE(mac);
+    mbedtls_key_exchange_type_t MBEDTLS_PRIVATE(key_exchange);
 
-    int min_major_ver;
-    int min_minor_ver;
-    int max_major_ver;
-    int max_minor_ver;
+    int MBEDTLS_PRIVATE(min_major_ver);
+    int MBEDTLS_PRIVATE(min_minor_ver);
+    int MBEDTLS_PRIVATE(max_major_ver);
+    int MBEDTLS_PRIVATE(max_minor_ver);
 
-    unsigned char flags;
+    unsigned char MBEDTLS_PRIVATE(flags);
 };
 
 const int *mbedtls_ssl_list_ciphersuites( void );
@@ -405,7 +397,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_PFS_ENABLED)
 static inline int mbedtls_ssl_ciphersuite_has_pfs( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
         case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
@@ -424,7 +416,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_NON_PFS_ENABLED)
 static inline int mbedtls_ssl_ciphersuite_no_pfs( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
         case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
@@ -442,7 +434,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDH_ENABLED)
 static inline int mbedtls_ssl_ciphersuite_uses_ecdh( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
         case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
@@ -456,7 +448,7 @@
 
 static inline int mbedtls_ssl_ciphersuite_cert_req_allowed( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_RSA:
         case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
@@ -473,7 +465,7 @@
 
 static inline int mbedtls_ssl_ciphersuite_uses_srv_cert( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_RSA:
         case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
@@ -492,7 +484,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_DHE_ENABLED)
 static inline int mbedtls_ssl_ciphersuite_uses_dhe( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
         case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
@@ -507,7 +499,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDHE_ENABLED)
 static inline int mbedtls_ssl_ciphersuite_uses_ecdhe( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
         case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
@@ -523,7 +515,7 @@
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_SERVER_SIGNATURE_ENABLED)
 static inline int mbedtls_ssl_ciphersuite_uses_server_signature( const mbedtls_ssl_ciphersuite_t *info )
 {
-    switch( info->key_exchange )
+    switch( info->MBEDTLS_PRIVATE(key_exchange) )
     {
         case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
         case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
diff --git a/include/mbedtls/ssl_cookie.h b/include/mbedtls/ssl_cookie.h
index 0a23870..86698b0 100644
--- a/include/mbedtls/ssl_cookie.h
+++ b/include/mbedtls/ssl_cookie.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_SSL_COOKIE_H
 #define MBEDTLS_SSL_COOKIE_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/ssl.h"
 
@@ -38,7 +35,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 #ifndef MBEDTLS_SSL_COOKIE_TIMEOUT
@@ -56,15 +53,15 @@
  */
 typedef struct mbedtls_ssl_cookie_ctx
 {
-    mbedtls_md_context_t    hmac_ctx;   /*!< context for the HMAC portion   */
+    mbedtls_md_context_t    MBEDTLS_PRIVATE(hmac_ctx);   /*!< context for the HMAC portion   */
 #if !defined(MBEDTLS_HAVE_TIME)
-    unsigned long   serial;     /*!< serial number for expiration   */
+    unsigned long   MBEDTLS_PRIVATE(serial);     /*!< serial number for expiration   */
 #endif
-    unsigned long   timeout;    /*!< timeout delay, in seconds if HAVE_TIME,
+    unsigned long   MBEDTLS_PRIVATE(timeout);    /*!< timeout delay, in seconds if HAVE_TIME,
                                      or in number of tickets issued */
 
 #if defined(MBEDTLS_THREADING_C)
-    mbedtls_threading_mutex_t mutex;
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);
 #endif
 } mbedtls_ssl_cookie_ctx;
 
diff --git a/include/mbedtls/ssl_ticket.h b/include/mbedtls/ssl_ticket.h
index a882eed..0f4117d 100644
--- a/include/mbedtls/ssl_ticket.h
+++ b/include/mbedtls/ssl_ticket.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_SSL_TICKET_H
 #define MBEDTLS_SSL_TICKET_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 /*
  * This implementation of the session ticket callbacks includes key
@@ -50,9 +47,9 @@
  */
 typedef struct mbedtls_ssl_ticket_key
 {
-    unsigned char name[4];          /*!< random key identifier              */
-    uint32_t generation_time;       /*!< key generation timestamp (seconds) */
-    mbedtls_cipher_context_t ctx;   /*!< context for auth enc/decryption    */
+    unsigned char MBEDTLS_PRIVATE(name)[4];          /*!< random key identifier              */
+    uint32_t MBEDTLS_PRIVATE(generation_time);       /*!< key generation timestamp (seconds) */
+    mbedtls_cipher_context_t MBEDTLS_PRIVATE(ctx);   /*!< context for auth enc/decryption    */
 }
 mbedtls_ssl_ticket_key;
 
@@ -61,17 +58,17 @@
  */
 typedef struct mbedtls_ssl_ticket_context
 {
-    mbedtls_ssl_ticket_key keys[2]; /*!< ticket protection keys             */
-    unsigned char active;           /*!< index of the currently active key  */
+    mbedtls_ssl_ticket_key MBEDTLS_PRIVATE(keys)[2]; /*!< ticket protection keys             */
+    unsigned char MBEDTLS_PRIVATE(active);           /*!< index of the currently active key  */
 
-    uint32_t ticket_lifetime;       /*!< lifetime of tickets in seconds     */
+    uint32_t MBEDTLS_PRIVATE(ticket_lifetime);       /*!< lifetime of tickets in seconds     */
 
     /** Callback for getting (pseudo-)random numbers                        */
-    int  (*f_rng)(void *, unsigned char *, size_t);
-    void *p_rng;                    /*!< context for the RNG function       */
+    int  (*MBEDTLS_PRIVATE(f_rng))(void *, unsigned char *, size_t);
+    void *MBEDTLS_PRIVATE(p_rng);                    /*!< context for the RNG function       */
 
 #if defined(MBEDTLS_THREADING_C)
-    mbedtls_threading_mutex_t mutex;
+    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);
 #endif
 }
 mbedtls_ssl_ticket_context;
@@ -89,7 +86,7 @@
  * \brief           Prepare context to be actually used
  *
  * \param ctx       Context to be set up
- * \param f_rng     RNG callback function
+ * \param f_rng     RNG callback function (mandatory)
  * \param p_rng     RNG callback context
  * \param cipher    AEAD cipher to use for ticket protection.
  *                  Recommended value: MBEDTLS_CIPHER_AES_256_GCM.
diff --git a/include/mbedtls/threading.h b/include/mbedtls/threading.h
index 1047f8f..fbc7374 100644
--- a/include/mbedtls/threading.h
+++ b/include/mbedtls/threading.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_THREADING_H
 #define MBEDTLS_THREADING_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stdlib.h>
 
@@ -34,18 +31,20 @@
 extern "C" {
 #endif
 
-#define MBEDTLS_ERR_THREADING_BAD_INPUT_DATA              -0x001C  /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_THREADING_MUTEX_ERROR                 -0x001E  /**< Locking / unlocking / free failed with error code. */
+/** Bad input parameters to function. */
+#define MBEDTLS_ERR_THREADING_BAD_INPUT_DATA              -0x001C
+/** Locking / unlocking / free failed with error code. */
+#define MBEDTLS_ERR_THREADING_MUTEX_ERROR                 -0x001E
 
 #if defined(MBEDTLS_THREADING_PTHREAD)
 #include <pthread.h>
 typedef struct mbedtls_threading_mutex_t
 {
-    pthread_mutex_t mutex;
+    pthread_mutex_t MBEDTLS_PRIVATE(mutex);
     /* is_valid is 0 after a failed init or a free, and nonzero after a
      * successful init. This field is not considered part of the public
      * API of Mbed TLS and may change without notice. */
-    char is_valid;
+    char MBEDTLS_PRIVATE(is_valid);
 } mbedtls_threading_mutex_t;
 #endif
 
diff --git a/include/mbedtls/timing.h b/include/mbedtls/timing.h
index b7290cf..25db1c6 100644
--- a/include/mbedtls/timing.h
+++ b/include/mbedtls/timing.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_TIMING_H
 #define MBEDTLS_TIMING_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include <stdint.h>
 
@@ -43,7 +40,7 @@
  */
 struct mbedtls_timing_hr_time
 {
-    unsigned char opaque[32];
+    unsigned char MBEDTLS_PRIVATE(opaque)[32];
 };
 
 /**
@@ -51,61 +48,19 @@
  */
 typedef struct mbedtls_timing_delay_context
 {
-    struct mbedtls_timing_hr_time   timer;
-    uint32_t                        int_ms;
-    uint32_t                        fin_ms;
+    struct mbedtls_timing_hr_time   MBEDTLS_PRIVATE(timer);
+    uint32_t                        MBEDTLS_PRIVATE(int_ms);
+    uint32_t                        MBEDTLS_PRIVATE(fin_ms);
 } mbedtls_timing_delay_context;
 
 #else  /* MBEDTLS_TIMING_ALT */
 #include "timing_alt.h"
 #endif /* MBEDTLS_TIMING_ALT */
 
-extern volatile int mbedtls_timing_alarmed;
-
-/**
- * \brief          Return the CPU cycle counter value
- *
- * \warning        This is only a best effort! Do not rely on this!
- *                 In particular, it is known to be unreliable on virtual
- *                 machines.
- *
- * \note           This value starts at an unspecified origin and
- *                 may wrap around.
- */
-unsigned long mbedtls_timing_hardclock( void );
-
-/**
- * \brief          Return the elapsed time in milliseconds
- *
- * \param val      points to a timer structure
- * \param reset    If 0, query the elapsed time. Otherwise (re)start the timer.
- *
- * \return         Elapsed time since the previous reset in ms. When
- *                 restarting, this is always 0.
- *
- * \note           To initialize a timer, call this function with reset=1.
- *
- *                 Determining the elapsed time and resetting the timer is not
- *                 atomic on all platforms, so after the sequence
- *                 `{ get_timer(1); ...; time1 = get_timer(1); ...; time2 =
- *                 get_timer(0) }` the value time1+time2 is only approximately
- *                 the delay since the first reset.
- */
+/* Internal use */
 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset );
 
 /**
- * \brief          Setup an alarm clock
- *
- * \param seconds  delay before the "mbedtls_timing_alarmed" flag is set
- *                 (must be >=0)
- *
- * \warning        Only one alarm at a time  is supported. In a threaded
- *                 context, this means one for the whole process, not one per
- *                 thread.
- */
-void mbedtls_set_alarm( int seconds );
-
-/**
  * \brief          Set a pair of delays to watch
  *                 (See \c mbedtls_timing_get_delay().)
  *
@@ -135,15 +90,6 @@
  */
 int mbedtls_timing_get_delay( void *data );
 
-#if defined(MBEDTLS_SELF_TEST)
-/**
- * \brief          Checkup routine
- *
- * \return         0 if successful, or 1 if a test failed
- */
-int mbedtls_timing_self_test( int verbose );
-#endif
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/mbedtls/version.h b/include/mbedtls/version.h
index 5b0c70f..773da4a 100644
--- a/include/mbedtls/version.h
+++ b/include/mbedtls/version.h
@@ -20,34 +20,14 @@
  *  limitations under the License.
  */
 /*
- * This set of compile-time defines and run-time variables can be used to
- * determine the version number of the mbed TLS library used.
+ * This set of run-time variables can be used to determine the version number of
+ * the Mbed TLS library used. Compile-time version defines for the same can be
+ * found in build_info.h
  */
 #ifndef MBEDTLS_VERSION_H
 #define MBEDTLS_VERSION_H
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-/**
- * The version number x.y.z is split into three parts.
- * Major, Minor, Patchlevel
- */
-#define MBEDTLS_VERSION_MAJOR  2
-#define MBEDTLS_VERSION_MINOR  26
-#define MBEDTLS_VERSION_PATCH  0
-
-/**
- * The single version number has the following structure:
- *    MMNNPP00
- *    Major version | Minor version | Patch version
- */
-#define MBEDTLS_VERSION_NUMBER         0x021A0000
-#define MBEDTLS_VERSION_STRING         "2.26.0"
-#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.26.0"
+#include "mbedtls/build_info.h"
 
 #if defined(MBEDTLS_VERSION_C)
 
@@ -90,7 +70,7 @@
  *
  * \note            only checks against defines in the sections "System
  *                  support", "mbed TLS modules" and "mbed TLS feature
- *                  support" in config.h
+ *                  support" in mbedtls_config.h
  *
  * \param feature   The string for the define to check (e.g. "MBEDTLS_AES_C")
  *
diff --git a/include/mbedtls/x509.h b/include/mbedtls/x509.h
index 3091de1..df187cb 100644
--- a/include/mbedtls/x509.h
+++ b/include/mbedtls/x509.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_X509_H
 #define MBEDTLS_X509_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/asn1.h"
 #include "mbedtls/pk.h"
@@ -56,26 +53,46 @@
  * \name X509 Error codes
  * \{
  */
-#define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE              -0x2080  /**< Unavailable feature, e.g. RSA hashing/encryption combination. */
-#define MBEDTLS_ERR_X509_UNKNOWN_OID                      -0x2100  /**< Requested OID is unknown. */
-#define MBEDTLS_ERR_X509_INVALID_FORMAT                   -0x2180  /**< The CRT/CRL/CSR format is invalid, e.g. different type expected. */
-#define MBEDTLS_ERR_X509_INVALID_VERSION                  -0x2200  /**< The CRT/CRL/CSR version element is invalid. */
-#define MBEDTLS_ERR_X509_INVALID_SERIAL                   -0x2280  /**< The serial tag or value is invalid. */
-#define MBEDTLS_ERR_X509_INVALID_ALG                      -0x2300  /**< The algorithm tag or value is invalid. */
-#define MBEDTLS_ERR_X509_INVALID_NAME                     -0x2380  /**< The name tag or value is invalid. */
-#define MBEDTLS_ERR_X509_INVALID_DATE                     -0x2400  /**< The date tag or value is invalid. */
-#define MBEDTLS_ERR_X509_INVALID_SIGNATURE                -0x2480  /**< The signature tag or value invalid. */
-#define MBEDTLS_ERR_X509_INVALID_EXTENSIONS               -0x2500  /**< The extension tag or value is invalid. */
-#define MBEDTLS_ERR_X509_UNKNOWN_VERSION                  -0x2580  /**< CRT/CRL/CSR has an unsupported version number. */
-#define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG                  -0x2600  /**< Signature algorithm (oid) is unsupported. */
-#define MBEDTLS_ERR_X509_SIG_MISMATCH                     -0x2680  /**< Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
-#define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED               -0x2700  /**< Certificate verification failed, e.g. CRL, CA or signature check failed. */
-#define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT              -0x2780  /**< Format not recognized as DER or PEM. */
-#define MBEDTLS_ERR_X509_BAD_INPUT_DATA                   -0x2800  /**< Input invalid. */
-#define MBEDTLS_ERR_X509_ALLOC_FAILED                     -0x2880  /**< Allocation of memory failed. */
-#define MBEDTLS_ERR_X509_FILE_IO_ERROR                    -0x2900  /**< Read/write of file failed. */
-#define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL                 -0x2980  /**< Destination buffer is too small. */
-#define MBEDTLS_ERR_X509_FATAL_ERROR                      -0x3000  /**< A fatal error occurred, eg the chain is too long or the vrfy callback failed. */
+/** Unavailable feature, e.g. RSA hashing/encryption combination. */
+#define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE              -0x2080
+/** Requested OID is unknown. */
+#define MBEDTLS_ERR_X509_UNKNOWN_OID                      -0x2100
+/** The CRT/CRL/CSR format is invalid, e.g. different type expected. */
+#define MBEDTLS_ERR_X509_INVALID_FORMAT                   -0x2180
+/** The CRT/CRL/CSR version element is invalid. */
+#define MBEDTLS_ERR_X509_INVALID_VERSION                  -0x2200
+/** The serial tag or value is invalid. */
+#define MBEDTLS_ERR_X509_INVALID_SERIAL                   -0x2280
+/** The algorithm tag or value is invalid. */
+#define MBEDTLS_ERR_X509_INVALID_ALG                      -0x2300
+/** The name tag or value is invalid. */
+#define MBEDTLS_ERR_X509_INVALID_NAME                     -0x2380
+/** The date tag or value is invalid. */
+#define MBEDTLS_ERR_X509_INVALID_DATE                     -0x2400
+/** The signature tag or value invalid. */
+#define MBEDTLS_ERR_X509_INVALID_SIGNATURE                -0x2480
+/** The extension tag or value is invalid. */
+#define MBEDTLS_ERR_X509_INVALID_EXTENSIONS               -0x2500
+/** CRT/CRL/CSR has an unsupported version number. */
+#define MBEDTLS_ERR_X509_UNKNOWN_VERSION                  -0x2580
+/** Signature algorithm (oid) is unsupported. */
+#define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG                  -0x2600
+/** Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */
+#define MBEDTLS_ERR_X509_SIG_MISMATCH                     -0x2680
+/** Certificate verification failed, e.g. CRL, CA or signature check failed. */
+#define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED               -0x2700
+/** Format not recognized as DER or PEM. */
+#define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT              -0x2780
+/** Input invalid. */
+#define MBEDTLS_ERR_X509_BAD_INPUT_DATA                   -0x2800
+/** Allocation of memory failed. */
+#define MBEDTLS_ERR_X509_ALLOC_FAILED                     -0x2880
+/** Read/write of file failed. */
+#define MBEDTLS_ERR_X509_FILE_IO_ERROR                    -0x2900
+/** Destination buffer is too small. */
+#define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL                 -0x2980
+/** A fatal error occurred, eg the chain is too long or the vrfy callback failed. */
+#define MBEDTLS_ERR_X509_FATAL_ERROR                      -0x3000
 /* \} name */
 
 /**
@@ -229,8 +246,8 @@
 /** Container for date and time (precision in seconds). */
 typedef struct mbedtls_x509_time
 {
-    int year, mon, day;         /**< Date. */
-    int hour, min, sec;         /**< Time. */
+    int MBEDTLS_PRIVATE(year), MBEDTLS_PRIVATE(mon), MBEDTLS_PRIVATE(day);         /**< Date. */
+    int MBEDTLS_PRIVATE(hour), MBEDTLS_PRIVATE(min), MBEDTLS_PRIVATE(sec);         /**< Time. */
 }
 mbedtls_x509_time;
 
diff --git a/include/mbedtls/x509_crl.h b/include/mbedtls/x509_crl.h
index fcaa149..9331827 100644
--- a/include/mbedtls/x509_crl.h
+++ b/include/mbedtls/x509_crl.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_X509_CRL_H
 #define MBEDTLS_X509_CRL_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/x509.h"
 
@@ -49,15 +46,15 @@
  */
 typedef struct mbedtls_x509_crl_entry
 {
-    mbedtls_x509_buf raw;
+    mbedtls_x509_buf MBEDTLS_PRIVATE(raw);
 
-    mbedtls_x509_buf serial;
+    mbedtls_x509_buf MBEDTLS_PRIVATE(serial);
 
-    mbedtls_x509_time revocation_date;
+    mbedtls_x509_time MBEDTLS_PRIVATE(revocation_date);
 
-    mbedtls_x509_buf entry_ext;
+    mbedtls_x509_buf MBEDTLS_PRIVATE(entry_ext);
 
-    struct mbedtls_x509_crl_entry *next;
+    struct mbedtls_x509_crl_entry *MBEDTLS_PRIVATE(next);
 }
 mbedtls_x509_crl_entry;
 
@@ -67,30 +64,30 @@
  */
 typedef struct mbedtls_x509_crl
 {
-    mbedtls_x509_buf raw;           /**< The raw certificate data (DER). */
-    mbedtls_x509_buf tbs;           /**< The raw certificate body (DER). The part that is To Be Signed. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(raw);           /**< The raw certificate data (DER). */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(tbs);           /**< The raw certificate body (DER). The part that is To Be Signed. */
 
-    int version;            /**< CRL version (1=v1, 2=v2) */
-    mbedtls_x509_buf sig_oid;       /**< CRL signature type identifier */
+    int MBEDTLS_PRIVATE(version);            /**< CRL version (1=v1, 2=v2) */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig_oid);       /**< CRL signature type identifier */
 
-    mbedtls_x509_buf issuer_raw;    /**< The raw issuer data (DER). */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(issuer_raw);    /**< The raw issuer data (DER). */
 
-    mbedtls_x509_name issuer;       /**< The parsed issuer data (named information object). */
+    mbedtls_x509_name MBEDTLS_PRIVATE(issuer);       /**< The parsed issuer data (named information object). */
 
-    mbedtls_x509_time this_update;
-    mbedtls_x509_time next_update;
+    mbedtls_x509_time MBEDTLS_PRIVATE(this_update);
+    mbedtls_x509_time MBEDTLS_PRIVATE(next_update);
 
-    mbedtls_x509_crl_entry entry;   /**< The CRL entries containing the certificate revocation times for this CA. */
+    mbedtls_x509_crl_entry MBEDTLS_PRIVATE(entry);   /**< The CRL entries containing the certificate revocation times for this CA. */
 
-    mbedtls_x509_buf crl_ext;
+    mbedtls_x509_buf MBEDTLS_PRIVATE(crl_ext);
 
-    mbedtls_x509_buf sig_oid2;
-    mbedtls_x509_buf sig;
-    mbedtls_md_type_t sig_md;           /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
-    mbedtls_pk_type_t sig_pk;           /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
-    void *sig_opts;             /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig_oid2);
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig);
+    mbedtls_md_type_t MBEDTLS_PRIVATE(sig_md);           /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
+    mbedtls_pk_type_t MBEDTLS_PRIVATE(sig_pk);           /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
+    void *MBEDTLS_PRIVATE(sig_opts);             /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
 
-    struct mbedtls_x509_crl *next;
+    struct mbedtls_x509_crl *MBEDTLS_PRIVATE(next);
 }
 mbedtls_x509_crl;
 
diff --git a/include/mbedtls/x509_crt.h b/include/mbedtls/x509_crt.h
index 23a20d1..49211a9 100644
--- a/include/mbedtls/x509_crt.h
+++ b/include/mbedtls/x509_crt.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_X509_CRT_H
 #define MBEDTLS_X509_CRT_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/x509.h"
 #include "mbedtls/x509_crl.h"
@@ -51,50 +48,50 @@
  */
 typedef struct mbedtls_x509_crt
 {
-    int own_buffer;                     /**< Indicates if \c raw is owned
+    int MBEDTLS_PRIVATE(own_buffer);                     /**< Indicates if \c raw is owned
                                          *   by the structure or not.        */
-    mbedtls_x509_buf raw;               /**< The raw certificate data (DER). */
-    mbedtls_x509_buf tbs;               /**< The raw certificate body (DER). The part that is To Be Signed. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(raw);               /**< The raw certificate data (DER). */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(tbs);               /**< The raw certificate body (DER). The part that is To Be Signed. */
 
-    int version;                /**< The X.509 version. (1=v1, 2=v2, 3=v3) */
-    mbedtls_x509_buf serial;            /**< Unique id for certificate issued by a specific CA. */
-    mbedtls_x509_buf sig_oid;           /**< Signature algorithm, e.g. sha1RSA */
+    int MBEDTLS_PRIVATE(version);                /**< The X.509 version. (1=v1, 2=v2, 3=v3) */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(serial);            /**< Unique id for certificate issued by a specific CA. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig_oid);           /**< Signature algorithm, e.g. sha1RSA */
 
-    mbedtls_x509_buf issuer_raw;        /**< The raw issuer data (DER). Used for quick comparison. */
-    mbedtls_x509_buf subject_raw;       /**< The raw subject data (DER). Used for quick comparison. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(issuer_raw);        /**< The raw issuer data (DER). Used for quick comparison. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(subject_raw);       /**< The raw subject data (DER). Used for quick comparison. */
 
-    mbedtls_x509_name issuer;           /**< The parsed issuer data (named information object). */
-    mbedtls_x509_name subject;          /**< The parsed subject data (named information object). */
+    mbedtls_x509_name MBEDTLS_PRIVATE(issuer);           /**< The parsed issuer data (named information object). */
+    mbedtls_x509_name MBEDTLS_PRIVATE(subject);          /**< The parsed subject data (named information object). */
 
-    mbedtls_x509_time valid_from;       /**< Start time of certificate validity. */
-    mbedtls_x509_time valid_to;         /**< End time of certificate validity. */
+    mbedtls_x509_time MBEDTLS_PRIVATE(valid_from);       /**< Start time of certificate validity. */
+    mbedtls_x509_time MBEDTLS_PRIVATE(valid_to);         /**< End time of certificate validity. */
 
-    mbedtls_x509_buf pk_raw;
-    mbedtls_pk_context pk;              /**< Container for the public key context. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(pk_raw);
+    mbedtls_pk_context MBEDTLS_PRIVATE(pk);              /**< Container for the public key context. */
 
-    mbedtls_x509_buf issuer_id;         /**< Optional X.509 v2/v3 issuer unique identifier. */
-    mbedtls_x509_buf subject_id;        /**< Optional X.509 v2/v3 subject unique identifier. */
-    mbedtls_x509_buf v3_ext;            /**< Optional X.509 v3 extensions.  */
-    mbedtls_x509_sequence subject_alt_names;    /**< Optional list of raw entries of Subject Alternative Names extension (currently only dNSName and OtherName are listed). */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(issuer_id);         /**< Optional X.509 v2/v3 issuer unique identifier. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(subject_id);        /**< Optional X.509 v2/v3 subject unique identifier. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(v3_ext);            /**< Optional X.509 v3 extensions.  */
+    mbedtls_x509_sequence MBEDTLS_PRIVATE(subject_alt_names);    /**< Optional list of raw entries of Subject Alternative Names extension (currently only dNSName and OtherName are listed). */
 
-    mbedtls_x509_sequence certificate_policies; /**< Optional list of certificate policies (Only anyPolicy is printed and enforced, however the rest of the policies are still listed). */
+    mbedtls_x509_sequence MBEDTLS_PRIVATE(certificate_policies); /**< Optional list of certificate policies (Only anyPolicy is printed and enforced, however the rest of the policies are still listed). */
 
-    int ext_types;              /**< Bit string containing detected and parsed extensions */
-    int ca_istrue;              /**< Optional Basic Constraint extension value: 1 if this certificate belongs to a CA, 0 otherwise. */
-    int max_pathlen;            /**< Optional Basic Constraint extension value: The maximum path length to the root certificate. Path length is 1 higher than RFC 5280 'meaning', so 1+ */
+    int MBEDTLS_PRIVATE(ext_types);              /**< Bit string containing detected and parsed extensions */
+    int MBEDTLS_PRIVATE(ca_istrue);              /**< Optional Basic Constraint extension value: 1 if this certificate belongs to a CA, 0 otherwise. */
+    int MBEDTLS_PRIVATE(max_pathlen);            /**< Optional Basic Constraint extension value: The maximum path length to the root certificate. Path length is 1 higher than RFC 5280 'meaning', so 1+ */
 
-    unsigned int key_usage;     /**< Optional key usage extension value: See the values in x509.h */
+    unsigned int MBEDTLS_PRIVATE(key_usage);     /**< Optional key usage extension value: See the values in x509.h */
 
-    mbedtls_x509_sequence ext_key_usage; /**< Optional list of extended key usage OIDs. */
+    mbedtls_x509_sequence MBEDTLS_PRIVATE(ext_key_usage); /**< Optional list of extended key usage OIDs. */
 
-    unsigned char ns_cert_type; /**< Optional Netscape certificate type extension value: See the values in x509.h */
+    unsigned char MBEDTLS_PRIVATE(ns_cert_type); /**< Optional Netscape certificate type extension value: See the values in x509.h */
 
-    mbedtls_x509_buf sig;               /**< Signature: hash of the tbs part signed with the private key. */
-    mbedtls_md_type_t sig_md;           /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
-    mbedtls_pk_type_t sig_pk;           /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
-    void *sig_opts;             /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig);               /**< Signature: hash of the tbs part signed with the private key. */
+    mbedtls_md_type_t MBEDTLS_PRIVATE(sig_md);           /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
+    mbedtls_pk_type_t MBEDTLS_PRIVATE(sig_pk);           /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
+    void *MBEDTLS_PRIVATE(sig_opts);             /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
 
-    struct mbedtls_x509_crt *next;     /**< Next certificate in the CA-chain. */
+    struct mbedtls_x509_crt *MBEDTLS_PRIVATE(next);     /**< Next certificate in the CA-chain. */
 }
 mbedtls_x509_crt;
 
@@ -111,7 +108,7 @@
      * To check the value of the type id, you should use
      * \p MBEDTLS_OID_CMP with a known OID mbedtls_x509_buf.
      */
-    mbedtls_x509_buf type_id;                   /**< The type id. */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(type_id);                   /**< The type id. */
     union
     {
         /**
@@ -122,12 +119,12 @@
          */
         struct
         {
-            mbedtls_x509_buf oid;               /**< The object identifier. */
-            mbedtls_x509_buf val;               /**< The named value. */
+            mbedtls_x509_buf MBEDTLS_PRIVATE(oid);               /**< The object identifier. */
+            mbedtls_x509_buf MBEDTLS_PRIVATE(val);               /**< The named value. */
         }
-        hardware_module_name;
+        MBEDTLS_PRIVATE(hardware_module_name);
     }
-    value;
+    MBEDTLS_PRIVATE(value);
 }
 mbedtls_x509_san_other_name;
 
@@ -136,12 +133,12 @@
  */
 typedef struct mbedtls_x509_subject_alternative_name
 {
-    int type;                              /**< The SAN type, value of MBEDTLS_X509_SAN_XXX. */
+    int MBEDTLS_PRIVATE(type);                              /**< The SAN type, value of MBEDTLS_X509_SAN_XXX. */
     union {
-        mbedtls_x509_san_other_name other_name; /**< The otherName supported type. */
-        mbedtls_x509_buf   unstructured_name; /**< The buffer for the un constructed types. Only dnsName currently supported */
+        mbedtls_x509_san_other_name MBEDTLS_PRIVATE(other_name); /**< The otherName supported type. */
+        mbedtls_x509_buf   MBEDTLS_PRIVATE(unstructured_name); /**< The buffer for the un constructed types. Only dnsName currently supported */
     }
-    san; /**< A union of the supported SAN types */
+    MBEDTLS_PRIVATE(san); /**< A union of the supported SAN types */
 }
 mbedtls_x509_subject_alternative_name;
 
@@ -155,6 +152,26 @@
  * Security profile for certificate verification.
  *
  * All lists are bitfields, built by ORing flags from MBEDTLS_X509_ID_FLAG().
+ *
+ * The fields of this structure are part of the public API and can be
+ * manipulated directly by applications. Future versions of the library may
+ * add extra fields or reorder existing fields.
+ *
+ * You can create custom profiles by starting from a copy of
+ * an existing profile, such as mbedtls_x509_crt_profile_default or
+ * mbedtls_x509_ctr_profile_none and then tune it to your needs.
+ *
+ * For example to allow SHA-224 in addition to the default:
+ *
+ *  mbedtls_x509_crt_profile my_profile = mbedtls_x509_crt_profile_default;
+ *  my_profile.allowed_mds |= MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 );
+ *
+ * Or to allow only RSA-3072+ with SHA-256:
+ *
+ *  mbedtls_x509_crt_profile my_profile = mbedtls_x509_crt_profile_none;
+ *  my_profile.allowed_mds = MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 );
+ *  my_profile.allowed_pks = MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_RSA );
+ *  my_profile.rsa_min_bitlen = 3072;
  */
 typedef struct mbedtls_x509_crt_profile
 {
@@ -249,16 +266,16 @@
  */
 typedef struct mbedtls_x509write_cert
 {
-    int version;
-    mbedtls_mpi serial;
-    mbedtls_pk_context *subject_key;
-    mbedtls_pk_context *issuer_key;
-    mbedtls_asn1_named_data *subject;
-    mbedtls_asn1_named_data *issuer;
-    mbedtls_md_type_t md_alg;
-    char not_before[MBEDTLS_X509_RFC5280_UTC_TIME_LEN + 1];
-    char not_after[MBEDTLS_X509_RFC5280_UTC_TIME_LEN + 1];
-    mbedtls_asn1_named_data *extensions;
+    int MBEDTLS_PRIVATE(version);
+    mbedtls_mpi MBEDTLS_PRIVATE(serial);
+    mbedtls_pk_context *MBEDTLS_PRIVATE(subject_key);
+    mbedtls_pk_context *MBEDTLS_PRIVATE(issuer_key);
+    mbedtls_asn1_named_data *MBEDTLS_PRIVATE(subject);
+    mbedtls_asn1_named_data *MBEDTLS_PRIVATE(issuer);
+    mbedtls_md_type_t MBEDTLS_PRIVATE(md_alg);
+    char MBEDTLS_PRIVATE(not_before)[MBEDTLS_X509_RFC5280_UTC_TIME_LEN + 1];
+    char MBEDTLS_PRIVATE(not_after)[MBEDTLS_X509_RFC5280_UTC_TIME_LEN + 1];
+    mbedtls_asn1_named_data *MBEDTLS_PRIVATE(extensions);
 }
 mbedtls_x509write_cert;
 
@@ -266,8 +283,8 @@
  * Item in a verification chain: cert and flags for it
  */
 typedef struct {
-    mbedtls_x509_crt *crt;
-    uint32_t flags;
+    mbedtls_x509_crt *MBEDTLS_PRIVATE(crt);
+    uint32_t MBEDTLS_PRIVATE(flags);
 } mbedtls_x509_crt_verify_chain_item;
 
 /**
@@ -280,15 +297,15 @@
  */
 typedef struct
 {
-    mbedtls_x509_crt_verify_chain_item items[MBEDTLS_X509_MAX_VERIFY_CHAIN_SIZE];
-    unsigned len;
+    mbedtls_x509_crt_verify_chain_item MBEDTLS_PRIVATE(items)[MBEDTLS_X509_MAX_VERIFY_CHAIN_SIZE];
+    unsigned MBEDTLS_PRIVATE(len);
 
 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
     /* This stores the list of potential trusted signers obtained from
      * the CA callback used for the CRT verification, if configured.
      * We must track it somewhere because the callback passes its
      * ownership to the caller. */
-    mbedtls_x509_crt *trust_ca_cb_result;
+    mbedtls_x509_crt *MBEDTLS_PRIVATE(trust_ca_cb_result);
 #endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
 } mbedtls_x509_crt_verify_chain;
 
@@ -300,23 +317,23 @@
 typedef struct
 {
     /* for check_signature() */
-    mbedtls_pk_restart_ctx pk;
+    mbedtls_pk_restart_ctx MBEDTLS_PRIVATE(pk);
 
     /* for find_parent_in() */
-    mbedtls_x509_crt *parent; /* non-null iff parent_in in progress */
-    mbedtls_x509_crt *fallback_parent;
-    int fallback_signature_is_good;
+    mbedtls_x509_crt *MBEDTLS_PRIVATE(parent); /* non-null iff parent_in in progress */
+    mbedtls_x509_crt *MBEDTLS_PRIVATE(fallback_parent);
+    int MBEDTLS_PRIVATE(fallback_signature_is_good);
 
     /* for find_parent() */
-    int parent_is_trusted; /* -1 if find_parent is not in progress */
+    int MBEDTLS_PRIVATE(parent_is_trusted); /* -1 if find_parent is not in progress */
 
     /* for verify_chain() */
     enum {
         x509_crt_rs_none,
         x509_crt_rs_find_parent,
-    } in_progress;  /* none if no operation is in progress */
-    int self_cnt;
-    mbedtls_x509_crt_verify_chain ver_chain;
+    } MBEDTLS_PRIVATE(in_progress);  /* none if no operation is in progress */
+    int MBEDTLS_PRIVATE(self_cnt);
+    mbedtls_x509_crt_verify_chain MBEDTLS_PRIVATE(ver_chain);
 
 } mbedtls_x509_crt_restart_ctx;
 
@@ -331,12 +348,22 @@
 /**
  * Default security profile. Should provide a good balance between security
  * and compatibility with current deployments.
+ *
+ * This profile permits:
+ * - SHA2 hashes with at least 256 bits: SHA-256, SHA-384, SHA-512.
+ * - Elliptic curves with 255 bits and above except secp256k1.
+ * - RSA with 2048 bits and above.
+ *
+ * New minor versions of Mbed TLS may extend this profile, for example if
+ * new algorithms are added to the library. New minor versions of Mbed TLS will
+ * not reduce this profile unless serious security concerns require it.
  */
 extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default;
 
 /**
  * Expected next default profile. Recommended for new deployments.
- * Currently targets a 128-bit security level, except for RSA-2048.
+ * Currently targets a 128-bit security level, except for allowing RSA-2048.
+ * This profile may change at any time.
  */
 extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next;
 
@@ -346,6 +373,12 @@
 extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_suiteb;
 
 /**
+ * Empty profile that allows nothing. Useful as a basis for constructing
+ * custom profiles.
+ */
+extern const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_none;
+
+/**
  * \brief          Parse a single DER formatted certificate and add it
  *                 to the end of the provided chained list.
  *
@@ -827,7 +860,6 @@
 
 #endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
 
-#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
 /**
  * \brief          Check usage of certificate against keyUsage extension.
  *
@@ -851,9 +883,7 @@
  */
 int mbedtls_x509_crt_check_key_usage( const mbedtls_x509_crt *crt,
                                       unsigned int usage );
-#endif /* MBEDTLS_X509_CHECK_KEY_USAGE) */
 
-#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
 /**
  * \brief           Check usage of certificate against extendedKeyUsage.
  *
@@ -870,7 +900,6 @@
 int mbedtls_x509_crt_check_extended_key_usage( const mbedtls_x509_crt *crt,
                                                const char *usage_oid,
                                                size_t usage_len );
-#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
 
 #if defined(MBEDTLS_X509_CRL_PARSE_C)
 /**
@@ -1111,16 +1140,13 @@
  * \param ctx       certificate to write away
  * \param buf       buffer to write to
  * \param size      size of the buffer
- * \param f_rng     RNG function (for signature, see note)
+ * \param f_rng     RNG function. This must not be \c NULL.
  * \param p_rng     RNG parameter
  *
  * \return          length of data written if successful, or a specific
  *                  error code
  *
- * \note            f_rng may be NULL if RSA is used for signature and the
- *                  signature is made offline (otherwise f_rng is desirable
- *                  for countermeasures against timing attacks).
- *                  ECDSA signatures always require a non-NULL f_rng.
+ * \note            \p f_rng is used for the signature operation.
  */
 int mbedtls_x509write_crt_der( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
                        int (*f_rng)(void *, unsigned char *, size_t),
@@ -1133,15 +1159,12 @@
  * \param ctx       certificate to write away
  * \param buf       buffer to write to
  * \param size      size of the buffer
- * \param f_rng     RNG function (for signature, see note)
+ * \param f_rng     RNG function. This must not be \c NULL.
  * \param p_rng     RNG parameter
  *
  * \return          0 if successful, or a specific error code
  *
- * \note            f_rng may be NULL if RSA is used for signature and the
- *                  signature is made offline (otherwise f_rng is desirable
- *                  for countermeasures against timing attacks).
- *                  ECDSA signatures always require a non-NULL f_rng.
+ * \note            \p f_rng is used for the signature operation.
  */
 int mbedtls_x509write_crt_pem( mbedtls_x509write_cert *ctx, unsigned char *buf, size_t size,
                        int (*f_rng)(void *, unsigned char *, size_t),
diff --git a/include/mbedtls/x509_csr.h b/include/mbedtls/x509_csr.h
index 4b8564c..674f9ce 100644
--- a/include/mbedtls/x509_csr.h
+++ b/include/mbedtls/x509_csr.h
@@ -21,12 +21,9 @@
  */
 #ifndef MBEDTLS_X509_CSR_H
 #define MBEDTLS_X509_CSR_H
+#include "mbedtls/private_access.h"
 
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/x509.h"
 
@@ -48,21 +45,21 @@
  */
 typedef struct mbedtls_x509_csr
 {
-    mbedtls_x509_buf raw;           /**< The raw CSR data (DER). */
-    mbedtls_x509_buf cri;           /**< The raw CertificateRequestInfo body (DER). */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(raw);           /**< The raw CSR data (DER). */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(cri);           /**< The raw CertificateRequestInfo body (DER). */
 
-    int version;            /**< CSR version (1=v1). */
+    int MBEDTLS_PRIVATE(version);            /**< CSR version (1=v1). */
 
-    mbedtls_x509_buf  subject_raw;  /**< The raw subject data (DER). */
-    mbedtls_x509_name subject;      /**< The parsed subject data (named information object). */
+    mbedtls_x509_buf  MBEDTLS_PRIVATE(subject_raw);  /**< The raw subject data (DER). */
+    mbedtls_x509_name MBEDTLS_PRIVATE(subject);      /**< The parsed subject data (named information object). */
 
-    mbedtls_pk_context pk;          /**< Container for the public key context. */
+    mbedtls_pk_context MBEDTLS_PRIVATE(pk);          /**< Container for the public key context. */
 
-    mbedtls_x509_buf sig_oid;
-    mbedtls_x509_buf sig;
-    mbedtls_md_type_t sig_md;       /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
-    mbedtls_pk_type_t sig_pk;       /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
-    void *sig_opts;         /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig_oid);
+    mbedtls_x509_buf MBEDTLS_PRIVATE(sig);
+    mbedtls_md_type_t MBEDTLS_PRIVATE(sig_md);       /**< Internal representation of the MD algorithm of the signature algorithm, e.g. MBEDTLS_MD_SHA256 */
+    mbedtls_pk_type_t MBEDTLS_PRIVATE(sig_pk);       /**< Internal representation of the Public Key algorithm of the signature algorithm, e.g. MBEDTLS_PK_RSA */
+    void *MBEDTLS_PRIVATE(sig_opts);         /**< Signature options to be passed to mbedtls_pk_verify_ext(), e.g. for RSASSA-PSS */
 }
 mbedtls_x509_csr;
 
@@ -71,10 +68,10 @@
  */
 typedef struct mbedtls_x509write_csr
 {
-    mbedtls_pk_context *key;
-    mbedtls_asn1_named_data *subject;
-    mbedtls_md_type_t md_alg;
-    mbedtls_asn1_named_data *extensions;
+    mbedtls_pk_context *MBEDTLS_PRIVATE(key);
+    mbedtls_asn1_named_data *MBEDTLS_PRIVATE(subject);
+    mbedtls_md_type_t MBEDTLS_PRIVATE(md_alg);
+    mbedtls_asn1_named_data *MBEDTLS_PRIVATE(extensions);
 }
 mbedtls_x509write_csr;
 
@@ -263,16 +260,13 @@
  * \param ctx       CSR to write away
  * \param buf       buffer to write to
  * \param size      size of the buffer
- * \param f_rng     RNG function (for signature, see note)
+ * \param f_rng     RNG function. This must not be \c NULL.
  * \param p_rng     RNG parameter
  *
  * \return          length of data written if successful, or a specific
  *                  error code
  *
- * \note            f_rng may be NULL if RSA is used for signature and the
- *                  signature is made offline (otherwise f_rng is desirable
- *                  for countermeasures against timing attacks).
- *                  ECDSA signatures always require a non-NULL f_rng.
+ * \note            \p f_rng is used for the signature operation.
  */
 int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
                        int (*f_rng)(void *, unsigned char *, size_t),
@@ -286,15 +280,12 @@
  * \param ctx       CSR to write away
  * \param buf       buffer to write to
  * \param size      size of the buffer
- * \param f_rng     RNG function (for signature, see note)
+ * \param f_rng     RNG function. This must not be \c NULL.
  * \param p_rng     RNG parameter
  *
  * \return          0 if successful, or a specific error code
  *
- * \note            f_rng may be NULL if RSA is used for signature and the
- *                  signature is made offline (otherwise f_rng is desirable
- *                  for countermeasures against timing attacks).
- *                  ECDSA signatures always require a non-NULL f_rng.
+ * \note            \p f_rng is used for the signature operation.
  */
 int mbedtls_x509write_csr_pem( mbedtls_x509write_csr *ctx, unsigned char *buf, size_t size,
                        int (*f_rng)(void *, unsigned char *, size_t),
diff --git a/include/mbedtls/xtea.h b/include/mbedtls/xtea.h
deleted file mode 100644
index 5ce2fe4..0000000
--- a/include/mbedtls/xtea.h
+++ /dev/null
@@ -1,134 +0,0 @@
-/**
- * \file xtea.h
- *
- * \brief XTEA block cipher (32-bit)
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0
- *
- *  Licensed under the Apache License, Version 2.0 (the "License"); you may
- *  not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-#ifndef MBEDTLS_XTEA_H
-#define MBEDTLS_XTEA_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-#include <stdint.h>
-
-#define MBEDTLS_XTEA_ENCRYPT     1
-#define MBEDTLS_XTEA_DECRYPT     0
-
-#define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH             -0x0028  /**< The data input has an invalid length. */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_XTEA_ALT)
-// Regular implementation
-//
-
-/**
- * \brief          XTEA context structure
- */
-typedef struct mbedtls_xtea_context
-{
-    uint32_t k[4];       /*!< key */
-}
-mbedtls_xtea_context;
-
-#else  /* MBEDTLS_XTEA_ALT */
-#include "xtea_alt.h"
-#endif /* MBEDTLS_XTEA_ALT */
-
-/**
- * \brief          Initialize XTEA context
- *
- * \param ctx      XTEA context to be initialized
- */
-void mbedtls_xtea_init( mbedtls_xtea_context *ctx );
-
-/**
- * \brief          Clear XTEA context
- *
- * \param ctx      XTEA context to be cleared
- */
-void mbedtls_xtea_free( mbedtls_xtea_context *ctx );
-
-/**
- * \brief          XTEA key schedule
- *
- * \param ctx      XTEA context to be initialized
- * \param key      the secret key
- */
-void mbedtls_xtea_setup( mbedtls_xtea_context *ctx, const unsigned char key[16] );
-
-/**
- * \brief          XTEA cipher function
- *
- * \param ctx      XTEA context
- * \param mode     MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
- * \param input    8-byte input block
- * \param output   8-byte output block
- *
- * \return         0 if successful
- */
-int mbedtls_xtea_crypt_ecb( mbedtls_xtea_context *ctx,
-                    int mode,
-                    const unsigned char input[8],
-                    unsigned char output[8] );
-
-#if defined(MBEDTLS_CIPHER_MODE_CBC)
-/**
- * \brief          XTEA CBC cipher function
- *
- * \param ctx      XTEA context
- * \param mode     MBEDTLS_XTEA_ENCRYPT or MBEDTLS_XTEA_DECRYPT
- * \param length   the length of input, multiple of 8
- * \param iv       initialization vector for CBC mode
- * \param input    input block
- * \param output   output block
- *
- * \return         0 if successful,
- *                 MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH if the length % 8 != 0
- */
-int mbedtls_xtea_crypt_cbc( mbedtls_xtea_context *ctx,
-                    int mode,
-                    size_t length,
-                    unsigned char iv[8],
-                    const unsigned char *input,
-                    unsigned char *output);
-#endif /* MBEDTLS_CIPHER_MODE_CBC */
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/**
- * \brief          Checkup routine
- *
- * \return         0 if successful, or 1 if the test failed
- */
-int mbedtls_xtea_self_test( int verbose );
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* xtea.h */
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 6aa7ccc..b3ef363 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -112,12 +112,6 @@
  * This macro returns a suitable initializer for a key attribute structure
  * of type #psa_key_attributes_t.
  */
-#ifdef __DOXYGEN_ONLY__
-/* This is an example definition for documentation purposes.
- * Implementations should define a suitable value in `crypto_struct.h`.
- */
-#define PSA_KEY_ATTRIBUTES_INIT {0}
-#endif
 
 /** Return an initial value for a key attributes structure.
  */
@@ -938,8 +932,8 @@
  *   \endcode
  *
  * This is an implementation-defined \c struct. Applications should not
- * make any assumptions about the content of this structure except
- * as directed by the documentation of a specific implementation. */
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice. */
 typedef struct psa_hash_operation_s psa_hash_operation_t;
 
 /** \def PSA_HASH_OPERATION_INIT
@@ -947,12 +941,6 @@
  * This macro returns a suitable initializer for a hash operation object
  * of type #psa_hash_operation_t.
  */
-#ifdef __DOXYGEN_ONLY__
-/* This is an example definition for documentation purposes.
- * Implementations should define a suitable value in `crypto_struct.h`.
- */
-#define PSA_HASH_OPERATION_INIT {0}
-#endif
 
 /** Return an initial value for a hash operation object.
  */
@@ -1307,9 +1295,10 @@
  *   operation = psa_mac_operation_init();
  *   \endcode
  *
+ *
  * This is an implementation-defined \c struct. Applications should not
- * make any assumptions about the content of this structure except
- * as directed by the documentation of a specific implementation. */
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice. */
 typedef struct psa_mac_operation_s psa_mac_operation_t;
 
 /** \def PSA_MAC_OPERATION_INIT
@@ -1317,12 +1306,6 @@
  * This macro returns a suitable initializer for a MAC operation object of type
  * #psa_mac_operation_t.
  */
-#ifdef __DOXYGEN_ONLY__
-/* This is an example definition for documentation purposes.
- * Implementations should define a suitable value in `crypto_struct.h`.
- */
-#define PSA_MAC_OPERATION_INIT {0}
-#endif
 
 /** Return an initial value for a MAC operation object.
  */
@@ -1732,8 +1715,8 @@
  *   \endcode
  *
  * This is an implementation-defined \c struct. Applications should not
- * make any assumptions about the content of this structure except
- * as directed by the documentation of a specific implementation. */
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice. */
 typedef struct psa_cipher_operation_s psa_cipher_operation_t;
 
 /** \def PSA_CIPHER_OPERATION_INIT
@@ -1741,12 +1724,6 @@
  * This macro returns a suitable initializer for a cipher operation object of
  * type #psa_cipher_operation_t.
  */
-#ifdef __DOXYGEN_ONLY__
-/* This is an example definition for documentation purposes.
- * Implementations should define a suitable value in `crypto_struct.h`.
- */
-#define PSA_CIPHER_OPERATION_INIT {0}
-#endif
 
 /** Return an initial value for a cipher operation object.
  */
@@ -2261,8 +2238,8 @@
  *   \endcode
  *
  * This is an implementation-defined \c struct. Applications should not
- * make any assumptions about the content of this structure except
- * as directed by the documentation of a specific implementation. */
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice. */
 typedef struct psa_aead_operation_s psa_aead_operation_t;
 
 /** \def PSA_AEAD_OPERATION_INIT
@@ -2270,12 +2247,6 @@
  * This macro returns a suitable initializer for an AEAD operation object of
  * type #psa_aead_operation_t.
  */
-#ifdef __DOXYGEN_ONLY__
-/* This is an example definition for documentation purposes.
- * Implementations should define a suitable value in `crypto_struct.h`.
- */
-#define PSA_AEAD_OPERATION_INIT {0}
-#endif
 
 /** Return an initial value for an AEAD operation object.
  */
@@ -3260,8 +3231,8 @@
  *   \endcode
  *
  * This is an implementation-defined \c struct. Applications should not
- * make any assumptions about the content of this structure except
- * as directed by the documentation of a specific implementation.
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice.
  */
 typedef struct psa_key_derivation_s psa_key_derivation_operation_t;
 
@@ -3270,12 +3241,6 @@
  * This macro returns a suitable initializer for a key derivation operation
  * object of type #psa_key_derivation_operation_t.
  */
-#ifdef __DOXYGEN_ONLY__
-/* This is an example definition for documentation purposes.
- * Implementations should define a suitable value in `crypto_struct.h`.
- */
-#define PSA_KEY_DERIVATION_OPERATION_INIT {0}
-#endif
 
 /** Return an initial value for a key derivation operation object.
  */
@@ -3717,7 +3682,6 @@
  *   The following key types defined in this specification follow this scheme:
  *
  *     - #PSA_KEY_TYPE_AES;
- *     - #PSA_KEY_TYPE_ARC4;
  *     - #PSA_KEY_TYPE_CAMELLIA;
  *     - #PSA_KEY_TYPE_DERIVE;
  *     - #PSA_KEY_TYPE_HMAC;
@@ -3841,7 +3805,7 @@
  * This function calculates output bytes from a key derivation algorithm and
  * compares those bytes to an expected value in constant time.
  * If you view the key derivation's output as a stream of bytes, this
- * function destructively reads the requested number of bytes from the
+ * function destructively reads the expected number of bytes from the
  * stream before comparing them.
  * The operation's capacity decreases by the number of bytes read.
  *
@@ -3860,13 +3824,13 @@
  * psa_key_derivation_abort().
  *
  * \param[in,out] operation The key derivation operation object to read from.
- * \param[in] expected_output Buffer where the output will be written.
+ * \param[in] expected_output Buffer containing the expected derivation output.
  * \param output_length     Length ot the expected output; this is also the
  *                          number of bytes that will be read.
  *
  * \retval #PSA_SUCCESS
  * \retval #PSA_ERROR_INVALID_SIGNATURE
- *         The output was read successfully, but if differs from the expected
+ *         The output was read successfully, but it differs from the expected
  *         output.
  * \retval #PSA_ERROR_NOT_PERMITTED
  *         One of the inputs was a key whose policy didn't allow
@@ -3876,7 +3840,7 @@
  *                          \p output_length bytes. Note that in this case,
  *                          the operation's capacity is set to 0, thus
  *                          subsequent calls to this function will not
- *                          succeed, even with a smaller output buffer.
+ *                          succeed, even with a smaller expected output.
  * \retval #PSA_ERROR_BAD_STATE
  *         The operation state is not valid (it must be active and completed
  *         all required input steps).
@@ -3941,7 +3905,7 @@
  *                          the length of the expected value. In this case,
  *                          the operation's capacity is set to 0, thus
  *                          subsequent calls to this function will not
- *                          succeed, even with a smaller output buffer.
+ *                          succeed, even with a smaller expected output.
  * \retval #PSA_ERROR_BAD_STATE
  *         The operation state is not valid (it must be active and completed
  *         all required input steps).
diff --git a/include/psa/crypto_builtin_composites.h b/include/psa/crypto_builtin_composites.h
index 7d8bc1a..cdecb28 100644
--- a/include/psa/crypto_builtin_composites.h
+++ b/include/psa/crypto_builtin_composites.h
@@ -32,6 +32,7 @@
 
 #ifndef PSA_CRYPTO_BUILTIN_COMPOSITES_H
 #define PSA_CRYPTO_BUILTIN_COMPOSITES_H
+#include "mbedtls/private_access.h"
 
 #include <psa/crypto_driver_common.h>
 
@@ -47,11 +48,11 @@
 typedef struct
 {
     /** The HMAC algorithm in use */
-    psa_algorithm_t alg;
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
     /** The hash context. */
     struct psa_hash_operation_s hash_ctx;
     /** The HMAC part of the context. */
-    uint8_t opad[PSA_HMAC_MAX_HASH_BLOCK_SIZE];
+    uint8_t MBEDTLS_PRIVATE(opad)[PSA_HMAC_MAX_HASH_BLOCK_SIZE];
 } mbedtls_psa_hmac_operation_t;
 
 #define MBEDTLS_PSA_HMAC_OPERATION_INIT {0, PSA_HASH_OPERATION_INIT, {0}}
@@ -61,17 +62,17 @@
 
 typedef struct
 {
-    psa_algorithm_t alg;
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
     union
     {
-        unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
+        unsigned MBEDTLS_PRIVATE(dummy); /* Make the union non-empty even with no supported algorithms. */
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HMAC) || defined(PSA_CRYPTO_DRIVER_TEST)
-        mbedtls_psa_hmac_operation_t hmac;
+        mbedtls_psa_hmac_operation_t MBEDTLS_PRIVATE(hmac);
 #endif /* MBEDTLS_PSA_BUILTIN_ALG_HMAC */
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_CMAC) || defined(PSA_CRYPTO_DRIVER_TEST)
-        mbedtls_cipher_context_t cmac;
+        mbedtls_cipher_context_t MBEDTLS_PRIVATE(cmac);
 #endif /* MBEDTLS_PSA_BUILTIN_ALG_CMAC */
-    } ctx;
+    } MBEDTLS_PRIVATE(ctx);
 } mbedtls_psa_mac_operation_t;
 
 #define MBEDTLS_PSA_MAC_OPERATION_INIT {0, {0}}
diff --git a/include/psa/crypto_builtin_primitives.h b/include/psa/crypto_builtin_primitives.h
index 75801a1..31f4aa6 100644
--- a/include/psa/crypto_builtin_primitives.h
+++ b/include/psa/crypto_builtin_primitives.h
@@ -32,6 +32,7 @@
 
 #ifndef PSA_CRYPTO_BUILTIN_PRIMITIVES_H
 #define PSA_CRYPTO_BUILTIN_PRIMITIVES_H
+#include "mbedtls/private_access.h"
 
 #include <psa/crypto_driver_common.h>
 
@@ -39,17 +40,13 @@
  * Hash multi-part operation definitions.
  */
 
-#include "mbedtls/md2.h"
-#include "mbedtls/md4.h"
 #include "mbedtls/md5.h"
 #include "mbedtls/ripemd160.h"
 #include "mbedtls/sha1.h"
 #include "mbedtls/sha256.h"
 #include "mbedtls/sha512.h"
 
-#if defined(MBEDTLS_PSA_BUILTIN_ALG_MD2) || \
-    defined(MBEDTLS_PSA_BUILTIN_ALG_MD4) || \
-    defined(MBEDTLS_PSA_BUILTIN_ALG_MD5) || \
+#if defined(MBEDTLS_PSA_BUILTIN_ALG_MD5) || \
     defined(MBEDTLS_PSA_BUILTIN_ALG_RIPEMD160) || \
     defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_1) || \
     defined(MBEDTLS_PSA_BUILTIN_ALG_SHA_224) || \
@@ -61,32 +58,26 @@
 
 typedef struct
 {
-    psa_algorithm_t alg;
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
     union
     {
-        unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
-#if defined(MBEDTLS_MD2_C)
-        mbedtls_md2_context md2;
-#endif
-#if defined(MBEDTLS_MD4_C)
-        mbedtls_md4_context md4;
-#endif
+        unsigned MBEDTLS_PRIVATE(dummy); /* Make the union non-empty even with no supported algorithms. */
 #if defined(MBEDTLS_MD5_C)
-        mbedtls_md5_context md5;
+        mbedtls_md5_context MBEDTLS_PRIVATE(md5);
 #endif
 #if defined(MBEDTLS_RIPEMD160_C)
-        mbedtls_ripemd160_context ripemd160;
+        mbedtls_ripemd160_context MBEDTLS_PRIVATE(ripemd160);
 #endif
 #if defined(MBEDTLS_SHA1_C)
-        mbedtls_sha1_context sha1;
+        mbedtls_sha1_context MBEDTLS_PRIVATE(sha1);
 #endif
 #if defined(MBEDTLS_SHA256_C)
-        mbedtls_sha256_context sha256;
+        mbedtls_sha256_context MBEDTLS_PRIVATE(sha256);
 #endif
 #if defined(MBEDTLS_SHA512_C)
-        mbedtls_sha512_context sha512;
+        mbedtls_sha512_context MBEDTLS_PRIVATE(sha512);
 #endif
-    } ctx;
+    } MBEDTLS_PRIVATE(ctx);
 } mbedtls_psa_hash_operation_t;
 
 #define MBEDTLS_PSA_HASH_OPERATION_INIT {0, {0}}
@@ -110,10 +101,13 @@
 
 typedef struct {
     /* Context structure for the Mbed TLS cipher implementation. */
-    psa_algorithm_t alg;
-    uint8_t iv_length;
-    uint8_t block_length;
-    mbedtls_cipher_context_t cipher;
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
+    uint8_t MBEDTLS_PRIVATE(iv_length);
+    uint8_t MBEDTLS_PRIVATE(block_length);
+    union {
+        unsigned int MBEDTLS_PRIVATE(dummy);
+        mbedtls_cipher_context_t MBEDTLS_PRIVATE(cipher);
+    } MBEDTLS_PRIVATE(ctx);
 } mbedtls_psa_cipher_operation_t;
 
 #define MBEDTLS_PSA_CIPHER_OPERATION_INIT {0, 0, 0, {0}}
diff --git a/include/psa/crypto_config.h b/include/psa/crypto_config.h
index eb16492..64d8c58 100644
--- a/include/psa/crypto_config.h
+++ b/include/psa/crypto_config.h
@@ -5,7 +5,7 @@
  */
 #if defined(MBEDTLS_PSA_CRYPTO_CONFIG)
 /**
- * When #MBEDTLS_PSA_CRYPTO_CONFIG is enabled in config.h,
+ * When #MBEDTLS_PSA_CRYPTO_CONFIG is enabled in mbedtls_config.h,
  * this file determines which cryptographic mechanisms are enabled
  * through the PSA Cryptography API (\c psa_xxx() functions).
  *
@@ -24,7 +24,7 @@
  */
 #else
 /**
- * When \c MBEDTLS_PSA_CRYPTO_CONFIG is disabled in config.h,
+ * When \c MBEDTLS_PSA_CRYPTO_CONFIG is disabled in mbedtls_config.h,
  * this file is not used, and cryptographic mechanisms are supported
  * through the PSA API if and only if they are supported through the
  * mbedtls_xxx API.
@@ -69,8 +69,6 @@
 #define PSA_WANT_ALG_GCM                        1
 #define PSA_WANT_ALG_HKDF                       1
 #define PSA_WANT_ALG_HMAC                       1
-#define PSA_WANT_ALG_MD2                        1
-#define PSA_WANT_ALG_MD4                        1
 #define PSA_WANT_ALG_MD5                        1
 #define PSA_WANT_ALG_OFB                        1
 /* PBKDF2-HMAC is not yet supported via the PSA API in Mbed TLS.
@@ -95,12 +93,7 @@
 #define PSA_WANT_ECC_BRAINPOOL_P_R1_384         1
 #define PSA_WANT_ECC_BRAINPOOL_P_R1_512         1
 #define PSA_WANT_ECC_MONTGOMERY_255             1
-/*
- * Curve448 is not yet supported via the PSA API in Mbed TLS
- * (https://github.com/ARMmbed/mbedtls/issues/4249). Thus, do not enable it by
- * default.
- */
-//#define PSA_WANT_ECC_MONTGOMERY_448             1
+#define PSA_WANT_ECC_MONTGOMERY_448             1
 #define PSA_WANT_ECC_SECP_K1_192                1
 /*
  * SECP224K1 is buggy via the PSA API in Mbed TLS
@@ -118,7 +111,6 @@
 #define PSA_WANT_KEY_TYPE_DERIVE                1
 #define PSA_WANT_KEY_TYPE_HMAC                  1
 #define PSA_WANT_KEY_TYPE_AES                   1
-#define PSA_WANT_KEY_TYPE_ARC4                  1
 #define PSA_WANT_KEY_TYPE_CAMELLIA              1
 #define PSA_WANT_KEY_TYPE_CHACHA20              1
 #define PSA_WANT_KEY_TYPE_DES                   1
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index a7b4ab5..2c0b106 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -27,6 +27,7 @@
 
 #ifndef PSA_CRYPTO_EXTRA_H
 #define PSA_CRYPTO_EXTRA_H
+#include "mbedtls/private_access.h"
 
 #include "mbedtls/platform_util.h"
 
@@ -39,7 +40,7 @@
 /* UID for secure storage seed */
 #define PSA_CRYPTO_ITS_RANDOM_SEED_UID 0xFFFFFF52
 
-/* See config.h for definition */
+/* See mbedtls_config.h for definition */
 #if !defined(MBEDTLS_PSA_KEY_SLOT_COUNT)
 #define MBEDTLS_PSA_KEY_SLOT_COUNT 32
 #endif
@@ -71,7 +72,7 @@
     psa_key_attributes_t *attributes,
     psa_algorithm_t alg2)
 {
-    attributes->core.policy.alg2 = alg2;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg2) = alg2;
 }
 
 /** Retrieve the enrollment algorithm policy from key attributes.
@@ -83,7 +84,7 @@
 static inline psa_algorithm_t psa_get_key_enrollment_algorithm(
     const psa_key_attributes_t *attributes)
 {
-    return( attributes->core.policy.alg2 );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg2) );
 }
 
 #if defined(MBEDTLS_PSA_CRYPTO_SE_C)
@@ -141,8 +142,8 @@
     psa_key_attributes_t *attributes,
     psa_key_slot_number_t slot_number )
 {
-    attributes->core.flags |= MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER;
-    attributes->slot_number = slot_number;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(flags) |= MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER;
+    attributes->MBEDTLS_PRIVATE(slot_number) = slot_number;
 }
 
 /** Remove the slot number attribute from a key attribute structure.
@@ -154,7 +155,7 @@
 static inline void psa_clear_key_slot_number(
     psa_key_attributes_t *attributes )
 {
-    attributes->core.flags &= ~MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(flags) &= ~MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER;
 }
 
 /** Register a key that is already present in a secure element.
@@ -226,26 +227,26 @@
 typedef struct mbedtls_psa_stats_s
 {
     /** Number of slots containing key material for a volatile key. */
-    size_t volatile_slots;
+    size_t MBEDTLS_PRIVATE(volatile_slots);
     /** Number of slots containing key material for a key which is in
      * internal persistent storage. */
-    size_t persistent_slots;
+    size_t MBEDTLS_PRIVATE(persistent_slots);
     /** Number of slots containing a reference to a key in a
      * secure element. */
-    size_t external_slots;
+    size_t MBEDTLS_PRIVATE(external_slots);
     /** Number of slots which are occupied, but do not contain
      * key material yet. */
-    size_t half_filled_slots;
+    size_t MBEDTLS_PRIVATE(half_filled_slots);
     /** Number of slots that contain cache data. */
-    size_t cache_slots;
+    size_t MBEDTLS_PRIVATE(cache_slots);
     /** Number of slots that are not used for anything. */
-    size_t empty_slots;
+    size_t MBEDTLS_PRIVATE(empty_slots);
     /** Number of slots that are locked. */
-    size_t locked_slots;
+    size_t MBEDTLS_PRIVATE(locked_slots);
     /** Largest key id value among open keys in internal persistent storage. */
-    psa_key_id_t max_open_internal_key_id;
+    psa_key_id_t MBEDTLS_PRIVATE(max_open_internal_key_id);
     /** Largest key id value among open keys in secure elements. */
-    psa_key_id_t max_open_external_key_id;
+    psa_key_id_t MBEDTLS_PRIVATE(max_open_external_key_id);
 } mbedtls_psa_stats_t;
 
 /** \brief Get statistics about
@@ -813,6 +814,1009 @@
 
 /** @} */
 
+/** \addtogroup crypto_types
+ * @{
+ */
+
+#define PSA_ALG_CATEGORY_PAKE                   ((psa_algorithm_t)0x0a000000)
+
+/** Whether the specified algorithm is a password-authenticated key exchange.
+ *
+ * \param alg An algorithm identifier (value of type #psa_algorithm_t).
+ *
+ * \return 1 if \p alg is a password-authenticated key exchange (PAKE)
+ *         algorithm, 0 otherwise.
+ *         This macro may return either 0 or 1 if \p alg is not a supported
+ *         algorithm identifier.
+ */
+#define PSA_ALG_IS_PAKE(alg)                                        \
+    (((alg) & PSA_ALG_CATEGORY_MASK) == PSA_ALG_CATEGORY_PAKE)
+
+/** The Password-authenticated key exchange by juggling (J-PAKE) algorithm.
+ *
+ * This is J-PAKE as defined by RFC 8236, instantiated with the following
+ * parameters:
+ *
+ * - The group can be either an elliptic curve or defined over a finite field.
+ * - Schnorr NIZK proof as defined by RFC 8235 and using the same group as the
+ *   J-PAKE algorithm.
+ * - A cryptographic hash function.
+ *
+ * To select these parameters and set up the cipher suite, call these functions
+ * in any order:
+ *
+ * \code
+ * psa_pake_cs_set_algorithm(cipher_suite, PSA_ALG_JPAKE);
+ * psa_pake_cs_set_primitive(cipher_suite,
+ *                           PSA_PAKE_PRIMITIVE(type, family, bits));
+ * psa_pake_cs_set_hash(cipher_suite, hash);
+ * \endcode
+ *
+ * For more information on how to set a specific curve or field, refer to the
+ * documentation of the individual \c PSA_PAKE_PRIMITIVE_TYPE_XXX constants.
+ *
+ * After initializing a J-PAKE operation, call
+ *
+ * \code
+ * psa_pake_setup(operation, cipher_suite);
+ * psa_pake_set_user(operation, ...);
+ * psa_pake_set_peer(operation, ...);
+ * psa_pake_set_password_key(operation, ...);
+ * \endcode
+ *
+ * The password is read as a byte array and must be non-empty. This can be the
+ * password itself (in some pre-defined character encoding) or some value
+ * derived from the password as mandated by some higher level protocol.
+ *
+ * (The implementation converts this byte array to a number as described in
+ * Section 2.3.8 of _SEC 1: Elliptic Curve Cryptography_
+ * (https://www.secg.org/sec1-v2.pdf), before reducing it modulo \c q. Here
+ * \c q is order of the group defined by the primitive set in the cipher suite.
+ * The \c psa_pake_set_password_xxx() functions return an error if the result
+ * of the reduction is 0.)
+ *
+ * The key exchange flow for J-PAKE is as follows:
+ * -# To get the first round data that needs to be sent to the peer, call
+ *    \code
+ *    // Get g1
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_KEY_SHARE, ...);
+ *    // Get the ZKP public key for x1
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_ZK_PUBLIC, ...);
+ *    // Get the ZKP proof for x1
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_ZK_PROOF, ...);
+ *    // Get g2
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_KEY_SHARE, ...);
+ *    // Get the ZKP public key for x2
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_ZK_PUBLIC, ...);
+ *    // Get the ZKP proof for x2
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_ZK_PROOF, ...);
+ *    \endcode
+ * -# To provide the first round data received from the peer to the operation,
+ *    call
+ *    \code
+ *    // Set g3
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_KEY_SHARE, ...);
+ *    // Set the ZKP public key for x3
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_ZK_PUBLIC, ...);
+ *    // Set the ZKP proof for x3
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_ZK_PROOF, ...);
+ *    // Set g4
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_KEY_SHARE, ...);
+ *    // Set the ZKP public key for x4
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_ZK_PUBLIC, ...);
+ *    // Set the ZKP proof for x4
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_ZK_PROOF, ...);
+ *    \endcode
+ * -# To get the second round data that needs to be sent to the peer, call
+ *    \code
+ *    // Get A
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_KEY_SHARE, ...);
+ *    // Get ZKP public key for x2*s
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_ZK_PUBLIC, ...);
+ *    // Get ZKP proof for x2*s
+ *    psa_pake_output(operation, #PSA_PAKE_STEP_ZK_PROOF, ...);
+ *    \endcode
+ * -# To provide the second round data received from the peer to the operation,
+ *    call
+ *    \code
+ *    // Set B
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_KEY_SHARE, ...);
+ *    // Set ZKP public key for x4*s
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_ZK_PUBLIC, ...);
+ *    // Set ZKP proof for x4*s
+ *    psa_pake_input(operation, #PSA_PAKE_STEP_ZK_PROOF, ...);
+ *    \endcode
+ * -# To access the shared secret call
+ *    \code
+ *    // Get Ka=Kb=K
+ *    psa_pake_get_implicit_key()
+ *    \endcode
+ *
+ * For more information consult the documentation of the individual
+ * \c PSA_PAKE_STEP_XXX constants.
+ *
+ * At this point there is a cryptographic guarantee that only the authenticated
+ * party who used the same password is able to compute the key. But there is no
+ * guarantee that the peer is the party it claims to be and was able to do so.
+ *
+ * That is, the authentication is only implicit (the peer is not authenticated
+ * at this point, and no action should be taken that assume that they are - like
+ * for example accessing restricted files).
+ *
+ * To make the authentication explicit there are various methods, see Section 5
+ * of RFC 8236 for two examples.
+ *
+ */
+#define PSA_ALG_JPAKE                   ((psa_algorithm_t)0x0a000100)
+
+/** @} */
+
+/** \defgroup pake Password-authenticated key exchange (PAKE)
+ *
+ * This is a proposed PAKE interface for the PSA Crypto API. It is not part of
+ * the official PSA Crypto API yet.
+ *
+ * \note The content of this section is not part of the stable API and ABI
+ *       of Mbed Crypto and may change arbitrarily from version to version.
+ *       Same holds for the corresponding macros #PSA_ALG_CATEGORY_PAKE and
+ *       #PSA_ALG_JPAKE.
+ * @{
+ */
+
+/** \brief Encoding of the side of PAKE
+ *
+ * Encodes which side of the algorithm is being executed. For more information
+ * see the documentation of individual \c PSA_PAKE_SIDE_XXX constants.
+ */
+typedef uint8_t psa_pake_side_t;
+
+/** Encoding of input and output indicators for PAKE.
+ *
+ * Some PAKE algorithms need to exchange more data than just a single key share.
+ * This type is for encoding additional input and output data for such
+ * algorithms.
+ */
+typedef uint8_t psa_pake_step_t;
+
+/** Encoding of the type of the PAKE's primitive.
+ *
+ * Values defined by this standard will never be in the range 0x80-0xff.
+ * Vendors who define additional types must use an encoding in this range.
+ *
+ * For more information see the documentation of individual
+ * \c PSA_PAKE_PRIMITIVE_TYPE_XXX constants.
+ */
+typedef uint8_t psa_pake_primitive_type_t;
+
+/** \brief Encoding of the family of the primitive associated with the PAKE.
+ *
+ * For more information see the documentation of individual
+ * \c PSA_PAKE_PRIMITIVE_TYPE_XXX constants.
+ */
+typedef uint8_t psa_pake_family_t;
+
+/** \brief Encoding of the primitive associated with the PAKE.
+ *
+ * For more information see the documentation of the #PSA_PAKE_PRIMITIVE macro.
+ */
+typedef uint32_t psa_pake_primitive_t;
+
+/** The first peer in a balanced PAKE.
+ *
+ * Although balanced PAKE algorithms are symmetric, some of them needs an
+ * ordering of peers for the transcript calculations. If the algorithm does not
+ * need this, both #PSA_PAKE_SIDE_FIRST and #PSA_PAKE_SIDE_SECOND are
+ * accepted.
+ */
+#define PSA_PAKE_SIDE_FIRST                ((psa_pake_side_t)0x01)
+
+/** The second peer in a balanced PAKE.
+ *
+ * Although balanced PAKE algorithms are symmetric, some of them needs an
+ * ordering of peers for the transcript calculations. If the algorithm does not
+ * need this, either #PSA_PAKE_SIDE_FIRST or #PSA_PAKE_SIDE_SECOND are
+ * accepted.
+ */
+#define PSA_PAKE_SIDE_SECOND                ((psa_pake_side_t)0x02)
+
+/** The client in an augmented PAKE.
+ *
+ * Augmented PAKE algorithms need to differentiate between client and server.
+ */
+#define PSA_PAKE_SIDE_CLIENT                ((psa_pake_side_t)0x11)
+
+/** The server in an augmented PAKE.
+ *
+ * Augmented PAKE algorithms need to differentiate between client and server.
+ */
+#define PSA_PAKE_SIDE_SERVER                ((psa_pake_side_t)0x12)
+
+/** The PAKE primitive type indicating the use of elliptic curves.
+ *
+ * The values of the \c family and \c bits fields of the cipher suite identify a
+ * specific elliptic curve, using the same mapping that is used for ECC
+ * (::psa_ecc_family_t) keys.
+ *
+ * (Here \c family means the value returned by psa_pake_cs_get_family() and
+ * \c bits means the value returned by psa_pake_cs_get_bits().)
+ *
+ * Input and output during the operation can involve group elements and scalar
+ * values:
+ * -# The format for group elements is the same as for public keys on the
+ *  specific curve would be. For more information, consult the documentation of
+ *  psa_export_public_key().
+ * -# The format for scalars is the same as for private keys on the specific
+ *  curve would be. For more information, consult the documentation of
+ *  psa_export_key().
+ */
+#define PSA_PAKE_PRIMITIVE_TYPE_ECC       ((psa_pake_primitive_type_t)0x01)
+
+/** The PAKE primitive type indicating the use of Diffie-Hellman groups.
+ *
+ * The values of the \c family and \c bits fields of the cipher suite identify
+ * a specific Diffie-Hellman group, using the same mapping that is used for
+ * Diffie-Hellman (::psa_dh_family_t) keys.
+ *
+ * (Here \c family means the value returned by psa_pake_cs_get_family() and
+ * \c bits means the value returned by psa_pake_cs_get_bits().)
+ *
+ * Input and output during the operation can involve group elements and scalar
+ * values:
+ * -# The format for group elements is the same as for public keys on the
+ *  specific group would be. For more information, consult the documentation of
+ *  psa_export_public_key().
+ * -# The format for scalars is the same as for private keys on the specific
+ *  group would be. For more information, consult the documentation of
+ *  psa_export_key().
+ */
+#define PSA_PAKE_PRIMITIVE_TYPE_DH       ((psa_pake_primitive_type_t)0x02)
+
+/** Construct a PAKE primitive from type, family and bit-size.
+ *
+ * \param pake_type     The type of the primitive
+ *                      (value of type ::psa_pake_primitive_type_t).
+ * \param pake_family   The family of the primitive
+ *                      (the type and interpretation of this parameter depends
+ *                      on \p type, for more information consult the
+ *                      documentation of individual ::psa_pake_primitive_type_t
+ *                      constants).
+ * \param pake_bits     The bit-size of the primitive
+ *                      (Value of type \c size_t. The interpretation
+ *                      of this parameter depends on \p family, for more
+ *                      information consult the documentation of individual
+ *                      ::psa_pake_primitive_type_t constants).
+ *
+ * \return The constructed primitive value of type ::psa_pake_primitive_t.
+ *         Return 0 if the requested primitive can't be encoded as
+ *         ::psa_pake_primitive_t.
+ */
+#define PSA_PAKE_PRIMITIVE(pake_type, pake_family, pake_bits) \
+    ((pake_bits & 0xFFFF) != pake_bits) ? 0 :                 \
+    ((psa_pake_primitive_t) (((pake_type) << 24 |             \
+            (pake_family) << 16) | (pake_bits)))
+
+/** The key share being sent to or received from the peer.
+ *
+ * The format for both input and output at this step is the same as for public
+ * keys on the group determined by the primitive (::psa_pake_primitive_t) would
+ * be.
+ *
+ * For more information on the format, consult the documentation of
+ * psa_export_public_key().
+ *
+ * For information regarding how the group is determined, consult the
+ * documentation #PSA_PAKE_PRIMITIVE.
+ */
+#define PSA_PAKE_STEP_KEY_SHARE                 ((psa_pake_step_t)0x01)
+
+/** A Schnorr NIZKP public key.
+ *
+ * This is the ephemeral public key in the Schnorr Non-Interactive
+ * Zero-Knowledge Proof (the value denoted by the letter 'V' in RFC 8235).
+ *
+ * The format for both input and output at this step is the same as for public
+ * keys on the group determined by the primitive (::psa_pake_primitive_t) would
+ * be.
+ *
+ * For more information on the format, consult the documentation of
+ * psa_export_public_key().
+ *
+ * For information regarding how the group is determined, consult the
+ * documentation #PSA_PAKE_PRIMITIVE.
+ */
+#define PSA_PAKE_STEP_ZK_PUBLIC                 ((psa_pake_step_t)0x02)
+
+/** A Schnorr NIZKP proof.
+ *
+ * This is the proof in the Schnorr Non-Interactive Zero-Knowledge Proof (the
+ * value denoted by the letter 'r' in RFC 8235).
+ *
+ * Both for input and output, the value at this step is an integer less than
+ * the order of the group selected in the cipher suite. The format depends on
+ * the group as well:
+ *
+ * - For Montgomery curves, the encoding is little endian.
+ * - For everything else the encoding is big endian (see Section 2.3.8 of
+ *   _SEC 1: Elliptic Curve Cryptography_ at https://www.secg.org/sec1-v2.pdf).
+ *
+ * In both cases leading zeroes are allowed as long as the length in bytes does
+ * not exceed the byte length of the group order.
+ *
+ * For information regarding how the group is determined, consult the
+ * documentation #PSA_PAKE_PRIMITIVE.
+ */
+#define PSA_PAKE_STEP_ZK_PROOF                  ((psa_pake_step_t)0x03)
+
+/** The type of the data strucure for PAKE cipher suites.
+ *
+ * This is an implementation-defined \c struct. Applications should not
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice.
+ */
+typedef struct psa_pake_cipher_suite_s psa_pake_cipher_suite_t;
+
+/** Retrieve the PAKE algorithm from a PAKE cipher suite.
+ *
+ * This function may be declared as `static` (i.e. without external
+ * linkage). This function may be provided as a function-like macro,
+ * but in this case it must evaluate its argument exactly once.
+ *
+ * \param[in] cipher_suite     The cipher suite structure to query.
+ *
+ * \return The PAKE algorithm stored in the cipher suite structure.
+ */
+static psa_algorithm_t psa_pake_cs_get_algorithm(
+                           const psa_pake_cipher_suite_t* cipher_suite
+                           );
+
+/** Declare the PAKE algorithm for the cipher suite.
+ *
+ * This function overwrites any PAKE algorithm
+ * previously set in \p cipher_suite.
+ *
+ * This function may be declared as `static` (i.e. without external
+ * linkage). This function may be provided as a function-like macro,
+ * but in this case it must evaluate each of its arguments exactly once.
+ *
+ * \param[out] cipher_suite    The cipher suite structure to write to.
+ * \param algorithm            The PAKE algorithm to write.
+ *                             (`PSA_ALG_XXX` values of type ::psa_algorithm_t
+ *                             such that #PSA_ALG_IS_PAKE(\c alg) is true.)
+ *                             If this is 0, the PAKE algorithm in
+ *                             \p cipher_suite becomes unspecified.
+ */
+static void psa_pake_cs_set_algorithm(
+                           psa_pake_cipher_suite_t* cipher_suite,
+                           psa_algorithm_t algorithm
+                           );
+
+/** Retrieve the primitive from a PAKE cipher suite.
+ *
+ * This function may be declared as `static` (i.e. without external linkage).
+ * This function may be provided as a function-like macro, but in this case it
+ * must evaluate its argument exactly once.
+ *
+ * \param[in] cipher_suite     The cipher suite structure to query.
+ *
+ * \return The primitive stored in the cipher suite structure.
+ */
+static psa_pake_primitive_t psa_pake_cs_get_primitive(
+                           const psa_pake_cipher_suite_t* cipher_suite
+                           );
+
+/** Declare the primitive for a PAKE cipher suite.
+ *
+ * This function overwrites any primitive previously set in \p cipher_suite.
+ *
+ * This function may be declared as `static` (i.e. without external
+ * linkage). This function may be provided as a function-like macro,
+ * but in this case it must evaluate each of its arguments exactly once.
+ *
+ * \param[out] cipher_suite    The cipher suite structure to write to.
+ * \param primitive            The primitive to write. If this is 0, the
+ *                             primitive type in \p cipher_suite becomes
+ *                             unspecified.
+ */
+static void psa_pake_cs_set_primitive(
+                           psa_pake_cipher_suite_t* cipher_suite,
+                           psa_pake_primitive_t primitive
+                           );
+
+/** Retrieve the hash algorithm from a PAKE cipher suite.
+ *
+ * This function may be declared as `static` (i.e. without external
+ * linkage). This function may be provided as a function-like macro,
+ * but in this case it must evaluate its argument exactly once.
+ *
+ * \param[in] cipher_suite      The cipher suite structure to query.
+ *
+ * \return The hash algorithm stored in the cipher suite structure. The return
+ *         value is 0 if the PAKE is not parametrised by a hash algorithm or if
+ *         the hash algorithm is not set.
+ */
+static psa_algorithm_t psa_pake_cs_get_hash(
+                           const psa_pake_cipher_suite_t* cipher_suite
+                           );
+
+/** Declare the hash algorithm for a PAKE cipher suite.
+ *
+ * This function overwrites any hash algorithm
+ * previously set in \p cipher_suite.
+ *
+ * This function may be declared as `static` (i.e. without external
+ * linkage). This function may be provided as a function-like macro,
+ * but in this case it must evaluate each of its arguments exactly once.
+ *
+ * Refer to the documentation of individual PAKE algorithm types (`PSA_ALG_XXX`
+ * values of type ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true)
+ * for more information.
+ *
+ * \param[out] cipher_suite     The cipher suite structure to write to.
+ * \param hash                  The hash involved in the cipher suite.
+ *                              (`PSA_ALG_XXX` values of type ::psa_algorithm_t
+ *                              such that #PSA_ALG_IS_HASH(\c alg) is true.)
+ *                              If this is 0, the hash algorithm in
+ *                              \p cipher_suite becomes unspecified.
+ */
+static void psa_pake_cs_set_hash(
+                           psa_pake_cipher_suite_t* cipher_suite,
+                           psa_algorithm_t hash
+                           );
+
+/** The type of the state data structure for PAKE operations.
+ *
+ * Before calling any function on a PAKE operation object, the application
+ * must initialize it by any of the following means:
+ * - Set the structure to all-bits-zero, for example:
+ *   \code
+ *   psa_pake_operation_t operation;
+ *   memset(&operation, 0, sizeof(operation));
+ *   \endcode
+ * - Initialize the structure to logical zero values, for example:
+ *   \code
+ *   psa_pake_operation_t operation = {0};
+ *   \endcode
+ * - Initialize the structure to the initializer #PSA_PAKE_OPERATION_INIT,
+ *   for example:
+ *   \code
+ *   psa_pake_operation_t operation = PSA_PAKE_OPERATION_INIT;
+ *   \endcode
+ * - Assign the result of the function psa_pake_operation_init()
+ *   to the structure, for example:
+ *   \code
+ *   psa_pake_operation_t operation;
+ *   operation = psa_pake_operation_init();
+ *   \endcode
+ *
+ * This is an implementation-defined \c struct. Applications should not
+ * make any assumptions about the content of this structure.
+ * Implementation details can change in future versions without notice. */
+typedef struct psa_pake_operation_s psa_pake_operation_t;
+
+/** Return an initial value for an PAKE operation object.
+ */
+static psa_pake_operation_t psa_pake_operation_init(void);
+
+/** Set the session information for a password-authenticated key exchange.
+ *
+ * The sequence of operations to set up a password-authenticated key exchange
+ * is as follows:
+ * -# Allocate an operation object which will be passed to all the functions
+ *    listed here.
+ * -# Initialize the operation object with one of the methods described in the
+ *    documentation for #psa_pake_operation_t, e.g.
+ *    #PSA_PAKE_OPERATION_INIT.
+ * -# Call psa_pake_setup() to specify the cipher suite.
+ * -# Call \c psa_pake_set_xxx() functions on the operation to complete the
+ *    setup. The exact sequence of \c psa_pake_set_xxx() functions that needs
+ *    to be called depends on the algorithm in use.
+ *
+ * Refer to the documentation of individual PAKE algorithm types (`PSA_ALG_XXX`
+ * values of type ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true)
+ * for more information.
+ *
+ * A typical sequence of calls to perform a password-authenticated key
+ * exchange:
+ * -# Call psa_pake_output(operation, #PSA_PAKE_STEP_KEY_SHARE, ...) to get the
+ *    key share that needs to be sent to the peer.
+ * -# Call psa_pake_input(operation, #PSA_PAKE_STEP_KEY_SHARE, ...) to provide
+ *    the key share that was received from the peer.
+ * -# Depending on the algorithm additional calls to psa_pake_output() and
+ *    psa_pake_input() might be necessary.
+ * -# Call psa_pake_get_implicit_key() for accessing the shared secret.
+ *
+ * Refer to the documentation of individual PAKE algorithm types (`PSA_ALG_XXX`
+ * values of type ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true)
+ * for more information.
+ *
+ * If an error occurs at any step after a call to psa_pake_setup(),
+ * the operation will need to be reset by a call to psa_pake_abort(). The
+ * application may call psa_pake_abort() at any time after the operation
+ * has been initialized.
+ *
+ * After a successful call to psa_pake_setup(), the application must
+ * eventually terminate the operation. The following events terminate an
+ * operation:
+ * - A call to psa_pake_abort().
+ * - A successful call to psa_pake_get_implicit_key().
+ *
+ * \param[in,out] operation     The operation object to set up. It must have
+ *                              been initialized but not set up yet.
+ * \param cipher_suite          The cipher suite to use. (A cipher suite fully
+ *                              characterizes a PAKE algorithm and determines
+ *                              the algorithm as well.)
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid.
+ * \retval #PSA_ERROR_NOT_SUPPORTED
+ *         The \p cipher_suite is not supported or is not valid.
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_setup(psa_pake_operation_t *operation,
+                            psa_pake_cipher_suite_t cipher_suite);
+
+/** Set the password for a password-authenticated key exchange from key ID.
+ *
+ * Call this function when the password, or a value derived from the password,
+ * is already present in the key store.
+ *
+ * \param[in,out] operation     The operation object to set the password for. It
+ *                              must have been set up by psa_pake_setup() and
+ *                              not yet in use (neither psa_pake_output() nor
+ *                              psa_pake_input() has been called yet). It must
+ *                              be on operation for which the password hasn't
+ *                              been set yet (psa_pake_set_password_key()
+ *                              hasn't been called yet).
+ * \param password              Identifier of the key holding the password or a
+ *                              value derived from the password (eg. by a
+ *                              memory-hard function).  It must remain valid
+ *                              until the operation terminates. It must be of
+ *                              type #PSA_KEY_TYPE_PASSWORD or
+ *                              #PSA_KEY_TYPE_PASSWORD_HASH. It has to allow
+ *                              the usage #PSA_KEY_USAGE_DERIVE.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid (it must have been set up.)
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_INVALID_HANDLE
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_ERROR_NOT_PERMITTED
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         \p key is not compatible with the algorithm or the cipher suite.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_set_password_key(psa_pake_operation_t *operation,
+                                       mbedtls_svc_key_id_t password);
+
+/** Set the user ID for a password-authenticated key exchange.
+ *
+ * Call this function to set the user ID. For PAKE algorithms that associate a
+ * user identifier with each side of the session you need to call
+ * psa_pake_set_peer() as well. For PAKE algorithms that associate a single
+ * user identifier with the session, call psa_pake_set_user() only.
+ *
+ * Refer to the documentation of individual PAKE algorithm types (`PSA_ALG_XXX`
+ * values of type ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true)
+ * for more information.
+ *
+ * \param[in,out] operation     The operation object to set the user ID for. It
+ *                              must have been set up by psa_pake_setup() and
+ *                              not yet in use (neither psa_pake_output() nor
+ *                              psa_pake_input() has been called yet). It must
+ *                              be on operation for which the user ID hasn't
+ *                              been set (psa_pake_set_user() hasn't been
+ *                              called yet).
+ * \param[in] user_id           The user ID to authenticate with.
+ * \param user_id_len           Size of the \p user_id buffer in bytes.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid.
+ * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         \p user_id is NULL.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_set_user(psa_pake_operation_t *operation,
+                               const uint8_t *user_id,
+                               size_t user_id_len);
+
+/** Set the peer ID for a password-authenticated key exchange.
+ *
+ * Call this function in addition to psa_pake_set_user() for PAKE algorithms
+ * that associate a user identifier with each side of the session. For PAKE
+ * algorithms that associate a single user identifier with the session, call
+ * psa_pake_set_user() only.
+ *
+ * Refer to the documentation of individual PAKE algorithm types (`PSA_ALG_XXX`
+ * values of type ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true)
+ * for more information.
+ *
+ * \param[in,out] operation     The operation object to set the peer ID for. It
+ *                              must have been set up by psa_pake_setup() and
+ *                              not yet in use (neither psa_pake_output() nor
+ *                              psa_pake_input() has been called yet). It must
+ *                              be on operation for which the peer ID hasn't
+ *                              been set (psa_pake_set_peer() hasn't been
+ *                              called yet).
+ * \param[in] peer_id           The peer's ID to authenticate.
+ * \param peer_id_len           Size of the \p peer_id buffer in bytes.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid.
+ * \retval #PSA_ERROR_NOT_SUPPORTED
+ *         The algorithm doesn't associate a second identity with the session.
+ * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         \p user_id is NULL.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_set_peer(psa_pake_operation_t *operation,
+                               const uint8_t *peer_id,
+                               size_t peer_id_len);
+
+/** Set the side for a password-authenticated key exchange.
+ *
+ * Not all PAKE algorithms need to differentiate the communicating entities.
+ * It is optional to call this function for PAKEs that don't require a side
+ * parameter. For such PAKEs the side parameter is ignored.
+ *
+ * Refer to the documentation of individual PAKE algorithm types (`PSA_ALG_XXX`
+ * values of type ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true)
+ * for more information.
+ *
+ * \param[in,out] operation     The operation object to set the side for. It
+ *                              must have been set up by psa_pake_setup() and
+ *                              not yet in use (neither psa_pake_output() nor
+ *                              psa_pake_input() has been called yet). It must
+ *                              be on operation for which the side hasn't been
+ *                              set (psa_pake_set_side() hasn't been called
+ *                              yet).
+ * \param side                  A value of type ::psa_pake_side_t signaling the
+ *                              side of the algorithm that is being set up. For
+ *                              more information see the documentation of
+ *                              \c PSA_PAKE_SIDE_XXX constants.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid.
+ * \retval #PSA_ERROR_NOT_SUPPORTED
+ *         The \p side for this algorithm is not supported or is not valid.
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_set_side(psa_pake_operation_t *operation,
+                               psa_pake_side_t side);
+
+/** Get output for a step of a password-authenticated key exchange.
+ *
+ * Depending on the algorithm being executed, you might need to call this
+ * function several times or you might not need to call this at all.
+ *
+ * The exact sequence of calls to perform a password-authenticated key
+ * exchange depends on the algorithm in use.  Refer to the documentation of
+ * individual PAKE algorithm types (`PSA_ALG_XXX` values of type
+ * ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true) for more
+ * information.
+ *
+ * If this function returns an error status, the operation enters an error
+ * state and must be aborted by calling psa_pake_abort().
+ *
+ * \param[in,out] operation    Active PAKE operation.
+ * \param step                 The step of the algorithm for which the output is
+ *                             requested.
+ * \param[out] output          Buffer where the output is to be written in the
+ *                             format appropriate for this \p step. Refer to
+ *                             the documentation of the individual
+ *                             \c PSA_PAKE_STEP_XXX constants for more
+ *                             information.
+ * \param output_size          Size of the \p output buffer in bytes. This must
+ *                             be at least #PSA_PAKE_OUTPUT_SIZE(\p alg, \c
+ *                             cipher_suite, \p type).
+ *
+ * \param[out] output_length   On success, the number of bytes of the returned
+ *                             output.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid (it must be active, but beyond that
+ *         validity is specific to the algorithm).
+ * \retval #PSA_ERROR_BUFFER_TOO_SMALL
+ *         The size of the \p output buffer is too small.
+ * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_output(psa_pake_operation_t *operation,
+                             psa_pake_step_t step,
+                             uint8_t *output,
+                             size_t output_size,
+                             size_t *output_length);
+
+/** Provide input for a step of a password-authenticated key exchange.
+ *
+ * Depending on the algorithm being executed, you might need to call this
+ * function several times or you might not need to call this at all.
+ *
+ * The exact sequence of calls to perform a password-authenticated key
+ * exchange depends on the algorithm in use.  Refer to the documentation of
+ * individual PAKE algorithm types (`PSA_ALG_XXX` values of type
+ * ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true) for more
+ * information.
+ *
+ * If this function returns an error status, the operation enters an error
+ * state and must be aborted by calling psa_pake_abort().
+ *
+ * \param[in,out] operation    Active PAKE operation.
+ * \param step                 The step for which the input is provided.
+ * \param[out] input           Buffer containing the input in the format
+ *                             appropriate for this \p step. Refer to the
+ *                             documentation of the individual
+ *                             \c PSA_PAKE_STEP_XXX constants for more
+ *                             information.
+ * \param[out] input_length    Size of the \p input buffer in bytes.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The operation state is not valid (it must be active, but beyond that
+ *         validity is specific to the algorithm).
+ * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         The input is not valid for the algorithm, ciphersuite or \p step.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_input(psa_pake_operation_t *operation,
+                            psa_pake_step_t step,
+                            uint8_t *input,
+                            size_t input_length);
+
+/** Get implicitly confirmed shared secret from a PAKE.
+ *
+ * At this point there is a cryptographic guarantee that only the authenticated
+ * party who used the same password is able to compute the key. But there is no
+ * guarantee that the peer is the party it claims to be and was able to do so.
+ *
+ * That is, the authentication is only implicit. Since the peer is not
+ * authenticated yet, no action should be taken yet that assumes that the peer
+ * is who it claims to be. For example, do not access restricted files on the
+ * peer's behalf until an explicit authentication has succeeded.
+ *
+ * This function can be called after the key exchange phase of the operation
+ * has completed. It imports the shared secret output of the PAKE into the
+ * provided derivation operation. The input step
+ * #PSA_KEY_DERIVATION_INPUT_SECRET is used when placing the shared key
+ * material in the key derivation operation.
+ *
+ * The exact sequence of calls to perform a password-authenticated key
+ * exchange depends on the algorithm in use.  Refer to the documentation of
+ * individual PAKE algorithm types (`PSA_ALG_XXX` values of type
+ * ::psa_algorithm_t such that #PSA_ALG_IS_PAKE(\c alg) is true) for more
+ * information.
+ *
+ * When this function returns successfully, \p operation becomes inactive.
+ * If this function returns an error status, both \p operation
+ * and \p key_derivation operations enter an error state and must be aborted by
+ * calling psa_pake_abort() and psa_key_derivation_abort() respectively.
+ *
+ * \param[in,out] operation    Active PAKE operation.
+ * \param[out] output          A key derivation operation that is ready
+ *                             for an input step of type
+ *                             #PSA_KEY_DERIVATION_INPUT_SECRET.
+ *
+ * \retval #PSA_SUCCESS
+ *         Success.
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The PAKE operation state is not valid (it must be active, but beyond
+ *         that validity is specific to the algorithm).
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The state of \p output is not valid for
+ *         the #PSA_KEY_DERIVATION_INPUT_SECRET step. This can happen if the
+ *         step is out of order or the application has done this step already
+ *         and it may not be repeated.
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         #PSA_KEY_DERIVATION_INPUT_SECRET is not compatible with the output’s
+ *         algorithm.
+ * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
+ * \retval #PSA_ERROR_COMMUNICATION_FAILURE
+ * \retval #PSA_ERROR_HARDWARE_FAILURE
+ * \retval #PSA_ERROR_CORRUPTION_DETECTED
+ * \retval #PSA_ERROR_STORAGE_FAILURE
+ * \retval #PSA_ERROR_BAD_STATE
+ *         The library has not been previously initialized by psa_crypto_init().
+ *         It is implementation-dependent whether a failure to initialize
+ *         results in this error code.
+ */
+psa_status_t psa_pake_get_implicit_key(psa_pake_operation_t *operation,
+                                       psa_key_derivation_operation_t *output);
+
+/**@}*/
+
+/** A sufficient output buffer size for psa_pake_output().
+ *
+ * If the size of the output buffer is at least this large, it is guaranteed
+ * that psa_pake_output() will not fail due to an insufficient output buffer
+ * size. The actual size of the output might be smaller in any given call.
+ *
+ * See also #PSA_PAKE_OUTPUT_MAX_SIZE
+ *
+ * \param alg           A PAKE algorithm (\c PSA_ALG_XXX value such that
+ *                      #PSA_ALG_IS_PAKE(\p alg) is true).
+ * \param primitive     A primitive of type ::psa_pake_primitive_t that is
+ *                      compatible with algorithm \p alg.
+ * \param output_step   A value of type ::psa_pake_step_t that is valid for the
+ *                      algorithm \p alg.
+ * \return              A sufficient output buffer size for the specified
+ *                      output, cipher suite and algorithm. If the cipher suite,
+ *                      the output type or PAKE algorithm is not recognized, or
+ *                      the parameters are incompatible, return 0.
+ */
+#define PSA_PAKE_OUTPUT_SIZE(alg, primitive, output_step) 0
+
+/** A sufficient input buffer size for psa_pake_input().
+ *
+ * The value returned by this macro is guaranteed to be large enough for any
+ * valid input to psa_pake_input() in an operation with the specified
+ * parameters.
+ *
+ * See also #PSA_PAKE_INPUT_MAX_SIZE
+ *
+ * \param alg           A PAKE algorithm (\c PSA_ALG_XXX value such that
+ *                      #PSA_ALG_IS_PAKE(\p alg) is true).
+ * \param primitive     A primitive of type ::psa_pake_primitive_t that is
+ *                      compatible with algorithm \p alg.
+ * \param input_step    A value of type ::psa_pake_step_t that is valid for the
+ *                      algorithm \p alg.
+ * \return              A sufficient input buffer size for the specified
+ *                      input, cipher suite and algorithm. If the cipher suite,
+ *                      the input type or PAKE algorithm is not recognized, or
+ *                      the parameters are incompatible, return 0.
+ */
+#define PSA_PAKE_INPUT_SIZE(alg, primitive, input_step) 0
+
+/** Output buffer size for psa_pake_output() for any of the supported cipher
+ * suites and PAKE algorithms.
+ *
+ * This macro must expand to a compile-time constant integer.
+ *
+ * See also #PSA_PAKE_OUTPUT_SIZE(\p alg, \p cipher_suite, \p output).
+ */
+#define PSA_PAKE_OUTPUT_MAX_SIZE 0
+
+/** Input buffer size for psa_pake_input() for any of the supported cipher
+ * suites and PAKE algorithms.
+ *
+ * This macro must expand to a compile-time constant integer.
+ *
+ * See also #PSA_PAKE_INPUT_SIZE(\p alg, \p cipher_suite, \p input).
+ */
+#define PSA_PAKE_INPUT_MAX_SIZE 0
+
+struct psa_pake_cipher_suite_s
+{
+    psa_algorithm_t algorithm;
+    psa_pake_primitive_type_t type;
+    psa_pake_family_t family;
+    uint16_t  bits;
+    psa_algorithm_t hash;
+};
+
+static inline psa_algorithm_t psa_pake_cs_get_algorithm(
+    const psa_pake_cipher_suite_t *cipher_suite)
+{
+    return(cipher_suite->algorithm);
+}
+
+static inline void psa_pake_cs_set_algorithm(
+    psa_pake_cipher_suite_t *cipher_suite,
+    psa_algorithm_t algorithm)
+{
+    if(!PSA_ALG_IS_PAKE(algorithm))
+        cipher_suite->algorithm = 0;
+    else
+        cipher_suite->algorithm = algorithm;
+}
+
+static inline psa_pake_primitive_t psa_pake_cs_get_primitive(
+    const psa_pake_cipher_suite_t *cipher_suite)
+{
+    return(PSA_PAKE_PRIMITIVE(cipher_suite->type, cipher_suite->family,
+                cipher_suite->bits));
+}
+
+static inline void psa_pake_cs_set_primitive(
+    psa_pake_cipher_suite_t *cipher_suite,
+    psa_pake_primitive_t primitive)
+{
+    cipher_suite->type = (psa_pake_primitive_type_t) (primitive >> 24);
+    cipher_suite->family = (psa_pake_family_t) (0xFF & (primitive >> 16));
+    cipher_suite->bits = (uint16_t) (0xFFFF & primitive);
+}
+
+static inline psa_algorithm_t psa_pake_cs_get_hash(
+    const psa_pake_cipher_suite_t *cipher_suite)
+{
+    return(cipher_suite->hash);
+}
+
+static inline void psa_pake_cs_set_hash(
+    psa_pake_cipher_suite_t *cipher_suite,
+    psa_algorithm_t hash)
+{
+    if(!PSA_ALG_IS_HASH(hash))
+        cipher_suite->hash = 0;
+    else
+        cipher_suite->hash = hash;
+}
+
+struct psa_pake_operation_s
+{
+    psa_algorithm_t alg;
+    union
+    {
+        /* Make the union non-empty even with no supported algorithms. */
+        uint8_t dummy;
+    } ctx;
+};
+
+/* This only zeroes out the first byte in the union, the rest is unspecified. */
+#define PSA_PAKE_OPERATION_INIT {0, {0}}
+static inline struct psa_pake_operation_s psa_pake_operation_init(void)
+{
+    const struct psa_pake_operation_s v = PSA_PAKE_OPERATION_INIT;
+    return(v);
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/psa/crypto_platform.h b/include/psa/crypto_platform.h
index 8acf22c..4787e44 100644
--- a/include/psa/crypto_platform.h
+++ b/include/psa/crypto_platform.h
@@ -32,14 +32,11 @@
 
 #ifndef PSA_CRYPTO_PLATFORM_H
 #define PSA_CRYPTO_PLATFORM_H
+#include "mbedtls/private_access.h"
 
 /* Include the Mbed TLS configuration file, the way Mbed TLS does it
  * in each of its header files. */
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 /* Translate between classic MBEDTLS_xxx feature symbols and PSA_xxx
  * feature symbols. */
@@ -81,6 +78,18 @@
 
 #endif /* MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER */
 
+/*
+ * When MBEDTLS_PSA_CRYPTO_SPM is defined, the code is being built for SPM
+ * (Secure Partition Manager) integration which separates the code into two
+ * parts: NSPE (Non-Secure Processing Environment) and SPE (Secure Processing
+ * Environment). When building for the SPE, an additional header file should be
+ * included.
+ */
+#if defined(MBEDTLS_PSA_CRYPTO_SPM)
+#define PSA_CRYPTO_SECURE 1
+#include "crypto_spe.h"
+#endif // MBEDTLS_PSA_CRYPTO_SPM
+
 #if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
 /** The type of the context passed to mbedtls_psa_external_get_random().
  *
@@ -92,7 +101,7 @@
  * are expected to replace it with a custom definition.
  */
 typedef struct {
-    uintptr_t opaque[2];
+    uintptr_t MBEDTLS_PRIVATE(opaque)[2];
 } mbedtls_psa_external_random_context_t;
 #endif /* MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */
 
diff --git a/include/psa/crypto_se_driver.h b/include/psa/crypto_se_driver.h
index 1dc8f9b..91a6d0b 100644
--- a/include/psa/crypto_se_driver.h
+++ b/include/psa/crypto_se_driver.h
@@ -33,6 +33,7 @@
  */
 #ifndef PSA_CRYPTO_SE_DRIVER_H
 #define PSA_CRYPTO_SE_DRIVER_H
+#include "mbedtls/private_access.h"
 
 #include "crypto_driver_common.h"
 
@@ -97,21 +98,21 @@
      * - psa_destroy_key() causes a call to
      *   psa_drv_se_key_management_t::p_destroy.
      */
-    const void *const persistent_data;
+    const void *const MBEDTLS_PRIVATE(persistent_data);
 
     /** The size of \c persistent_data in bytes.
      *
      * This is always equal to the value of the `persistent_data_size` field
      * of the ::psa_drv_se_t structure when the driver is registered.
      */
-    const size_t persistent_data_size;
+    const size_t MBEDTLS_PRIVATE(persistent_data_size);
 
     /** Driver transient data.
      *
      * The core initializes this value to 0 and does not read or modify it
      * afterwards. The driver may store whatever it wants in this field.
      */
-    uintptr_t transient_data;
+    uintptr_t MBEDTLS_PRIVATE(transient_data);
 } psa_drv_se_context_t;
 
 /** \brief A driver initialization function.
@@ -323,28 +324,28 @@
     /**The size in bytes of the hardware-specific secure element MAC context
      * structure
     */
-    size_t                    context_size;
+    size_t                    MBEDTLS_PRIVATE(context_size);
     /** Function that performs a MAC setup operation
      */
-    psa_drv_se_mac_setup_t          p_setup;
+    psa_drv_se_mac_setup_t          MBEDTLS_PRIVATE(p_setup);
     /** Function that performs a MAC update operation
      */
-    psa_drv_se_mac_update_t         p_update;
+    psa_drv_se_mac_update_t         MBEDTLS_PRIVATE(p_update);
     /** Function that completes a MAC operation
      */
-    psa_drv_se_mac_finish_t         p_finish;
+    psa_drv_se_mac_finish_t         MBEDTLS_PRIVATE(p_finish);
     /** Function that completes a MAC operation with a verify check
      */
-    psa_drv_se_mac_finish_verify_t  p_finish_verify;
+    psa_drv_se_mac_finish_verify_t  MBEDTLS_PRIVATE(p_finish_verify);
     /** Function that aborts a previoustly started MAC operation
      */
-    psa_drv_se_mac_abort_t          p_abort;
+    psa_drv_se_mac_abort_t          MBEDTLS_PRIVATE(p_abort);
     /** Function that performs a MAC operation in one call
      */
-    psa_drv_se_mac_generate_t       p_mac;
+    psa_drv_se_mac_generate_t       MBEDTLS_PRIVATE(p_mac);
     /** Function that performs a MAC and verify operation in one call
      */
-    psa_drv_se_mac_verify_t         p_mac_verify;
+    psa_drv_se_mac_verify_t         MBEDTLS_PRIVATE(p_mac_verify);
 } psa_drv_se_mac_t;
 /**@}*/
 
@@ -510,22 +511,22 @@
     /** The size in bytes of the hardware-specific secure element cipher
      * context structure
      */
-    size_t               context_size;
+    size_t               MBEDTLS_PRIVATE(context_size);
     /** Function that performs a cipher setup operation */
-    psa_drv_se_cipher_setup_t  p_setup;
+    psa_drv_se_cipher_setup_t  MBEDTLS_PRIVATE(p_setup);
     /** Function that sets a cipher IV (if necessary) */
-    psa_drv_se_cipher_set_iv_t p_set_iv;
+    psa_drv_se_cipher_set_iv_t MBEDTLS_PRIVATE(p_set_iv);
     /** Function that performs a cipher update operation */
-    psa_drv_se_cipher_update_t p_update;
+    psa_drv_se_cipher_update_t MBEDTLS_PRIVATE(p_update);
     /** Function that completes a cipher operation */
-    psa_drv_se_cipher_finish_t p_finish;
+    psa_drv_se_cipher_finish_t MBEDTLS_PRIVATE(p_finish);
     /** Function that aborts a cipher operation */
-    psa_drv_se_cipher_abort_t  p_abort;
+    psa_drv_se_cipher_abort_t  MBEDTLS_PRIVATE(p_abort);
     /** Function that performs ECB mode for a cipher operation
      * (Danger: ECB mode should not be used directly by clients of the PSA
      * Crypto Client API)
      */
-    psa_drv_se_cipher_ecb_t    p_ecb;
+    psa_drv_se_cipher_ecb_t    MBEDTLS_PRIVATE(p_ecb);
 } psa_drv_se_cipher_t;
 
 /**@}*/
@@ -681,13 +682,13 @@
  */
 typedef struct {
     /** Function that performs an asymmetric sign operation */
-    psa_drv_se_asymmetric_sign_t    p_sign;
+    psa_drv_se_asymmetric_sign_t    MBEDTLS_PRIVATE(p_sign);
     /** Function that performs an asymmetric verify operation */
-    psa_drv_se_asymmetric_verify_t  p_verify;
+    psa_drv_se_asymmetric_verify_t  MBEDTLS_PRIVATE(p_verify);
     /** Function that performs an asymmetric encrypt operation */
-    psa_drv_se_asymmetric_encrypt_t p_encrypt;
+    psa_drv_se_asymmetric_encrypt_t MBEDTLS_PRIVATE(p_encrypt);
     /** Function that performs an asymmetric decrypt operation */
-    psa_drv_se_asymmetric_decrypt_t p_decrypt;
+    psa_drv_se_asymmetric_decrypt_t MBEDTLS_PRIVATE(p_decrypt);
 } psa_drv_se_asymmetric_t;
 
 /**@}*/
@@ -798,9 +799,9 @@
  */
 typedef struct {
     /** Function that performs the AEAD encrypt operation */
-    psa_drv_se_aead_encrypt_t p_encrypt;
+    psa_drv_se_aead_encrypt_t MBEDTLS_PRIVATE(p_encrypt);
     /** Function that performs the AEAD decrypt operation */
-    psa_drv_se_aead_decrypt_t p_decrypt;
+    psa_drv_se_aead_decrypt_t MBEDTLS_PRIVATE(p_decrypt);
 } psa_drv_se_aead_t;
 /**@}*/
 
@@ -1120,19 +1121,19 @@
  */
 typedef struct {
     /** Function that allocates a slot for a key. */
-    psa_drv_se_allocate_key_t   p_allocate;
+    psa_drv_se_allocate_key_t   MBEDTLS_PRIVATE(p_allocate);
     /** Function that checks the validity of a slot for a key. */
-    psa_drv_se_validate_slot_number_t p_validate_slot_number;
+    psa_drv_se_validate_slot_number_t MBEDTLS_PRIVATE(p_validate_slot_number);
     /** Function that performs a key import operation */
-    psa_drv_se_import_key_t     p_import;
+    psa_drv_se_import_key_t     MBEDTLS_PRIVATE(p_import);
     /** Function that performs a generation */
-    psa_drv_se_generate_key_t   p_generate;
+    psa_drv_se_generate_key_t   MBEDTLS_PRIVATE(p_generate);
     /** Function that performs a key destroy operation */
-    psa_drv_se_destroy_key_t    p_destroy;
+    psa_drv_se_destroy_key_t    MBEDTLS_PRIVATE(p_destroy);
     /** Function that performs a key export operation */
-    psa_drv_se_export_key_t     p_export;
+    psa_drv_se_export_key_t     MBEDTLS_PRIVATE(p_export);
     /** Function that performs a public key export operation */
-    psa_drv_se_export_key_t     p_export_public;
+    psa_drv_se_export_key_t     MBEDTLS_PRIVATE(p_export_public);
 } psa_drv_se_key_management_t;
 
 /**@}*/
@@ -1263,16 +1264,16 @@
  */
 typedef struct {
     /** The driver-specific size of the key derivation context */
-    size_t                           context_size;
+    size_t                           MBEDTLS_PRIVATE(context_size);
     /** Function that performs a key derivation setup */
-    psa_drv_se_key_derivation_setup_t      p_setup;
+    psa_drv_se_key_derivation_setup_t      MBEDTLS_PRIVATE(p_setup);
     /** Function that sets key derivation collateral */
-    psa_drv_se_key_derivation_collateral_t p_collateral;
+    psa_drv_se_key_derivation_collateral_t MBEDTLS_PRIVATE(p_collateral);
     /** Function that performs a final key derivation step */
-    psa_drv_se_key_derivation_derive_t     p_derive;
+    psa_drv_se_key_derivation_derive_t     MBEDTLS_PRIVATE(p_derive);
     /** Function that perforsm a final key derivation or agreement and
      * exports the key */
-    psa_drv_se_key_derivation_export_t     p_export;
+    psa_drv_se_key_derivation_export_t     MBEDTLS_PRIVATE(p_export);
 } psa_drv_se_key_derivation_t;
 
 /**@}*/
@@ -1293,7 +1294,7 @@
      * a different version of this specification.
      * Use #PSA_DRV_SE_HAL_VERSION.
      */
-    uint32_t hal_version;
+    uint32_t MBEDTLS_PRIVATE(hal_version);
 
     /** The size of the driver's persistent data in bytes.
      *
@@ -1303,7 +1304,7 @@
      * for more information about why and how a driver can use
      * persistent data.
      */
-    size_t persistent_data_size;
+    size_t MBEDTLS_PRIVATE(persistent_data_size);
 
     /** The driver initialization function.
      *
@@ -1315,14 +1316,14 @@
      * If this field is \c NULL, it is equivalent to a function that does
      * nothing and returns #PSA_SUCCESS.
      */
-    psa_drv_se_init_t p_init;
+    psa_drv_se_init_t MBEDTLS_PRIVATE(p_init);
 
-    const psa_drv_se_key_management_t *key_management;
-    const psa_drv_se_mac_t *mac;
-    const psa_drv_se_cipher_t *cipher;
-    const psa_drv_se_aead_t *aead;
-    const psa_drv_se_asymmetric_t *asymmetric;
-    const psa_drv_se_key_derivation_t *derivation;
+    const psa_drv_se_key_management_t *MBEDTLS_PRIVATE(key_management);
+    const psa_drv_se_mac_t *MBEDTLS_PRIVATE(mac);
+    const psa_drv_se_cipher_t *MBEDTLS_PRIVATE(cipher);
+    const psa_drv_se_aead_t *MBEDTLS_PRIVATE(aead);
+    const psa_drv_se_asymmetric_t *MBEDTLS_PRIVATE(asymmetric);
+    const psa_drv_se_key_derivation_t *MBEDTLS_PRIVATE(derivation);
 } psa_drv_se_t;
 
 /** The current version of the secure element driver HAL.
diff --git a/include/psa/crypto_sizes.h b/include/psa/crypto_sizes.h
index 79f9673..4c67f10 100644
--- a/include/psa/crypto_sizes.h
+++ b/include/psa/crypto_sizes.h
@@ -42,11 +42,7 @@
 
 /* Include the Mbed TLS configuration file, the way Mbed TLS does it
  * in each of its header files. */
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #define PSA_BITS_TO_BYTES(bits) (((bits) + 7) / 8)
 #define PSA_BYTES_TO_BITS(bytes) ((bytes) * 8)
@@ -68,8 +64,6 @@
  */
 #define PSA_HASH_LENGTH(alg)                                        \
     (                                                               \
-        PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD2 ? 16 :            \
-        PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD4 ? 16 :            \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_MD5 ? 16 :            \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_RIPEMD160 ? 20 :      \
         PSA_ALG_HMAC_GET_HASH(alg) == PSA_ALG_SHA_1 ? 20 :          \
@@ -998,9 +992,10 @@
  */
 #define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length)             \
     (alg == PSA_ALG_CBC_PKCS7 ?                                                 \
+     (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ?                            \
      PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type),          \
                               (input_length) + 1) +                             \
-     PSA_CIPHER_IV_LENGTH((key_type), (alg)) :                                  \
+     PSA_CIPHER_IV_LENGTH((key_type), (alg)) : 0) :                             \
      (PSA_ALG_IS_CIPHER(alg) ?                                                  \
       (input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) :                \
      0))
@@ -1079,12 +1074,13 @@
  */
 #define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length)              \
     (PSA_ALG_IS_CIPHER(alg) ?                                                   \
+    (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) != 0 ?                             \
      (((alg) == PSA_ALG_CBC_PKCS7      ||                                       \
        (alg) == PSA_ALG_CBC_NO_PADDING ||                                       \
        (alg) == PSA_ALG_ECB_NO_PADDING) ?                                       \
       PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type),         \
                                 input_length) :                                 \
-      (input_length)) :                                                         \
+      (input_length)) : 0) :                                                    \
      0)
 
 /** A sufficient output buffer size for psa_cipher_update(), for any of the
diff --git a/include/psa/crypto_struct.h b/include/psa/crypto_struct.h
index e05c846..4b1195d 100644
--- a/include/psa/crypto_struct.h
+++ b/include/psa/crypto_struct.h
@@ -60,6 +60,7 @@
 
 #ifndef PSA_CRYPTO_STRUCT_H
 #define PSA_CRYPTO_STRUCT_H
+#include "mbedtls/private_access.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -67,11 +68,7 @@
 
 /* Include the Mbed TLS configuration file, the way Mbed TLS does it
  * in each of its header files. */
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
+#include "mbedtls/build_info.h"
 
 #include "mbedtls/cmac.h"
 #include "mbedtls/gcm.h"
@@ -90,11 +87,11 @@
      * ID values are auto-generated in psa_driver_wrappers.h.
      * ID value zero means the context is not valid or not assigned to
      * any driver (i.e. the driver context is not active, in use). */
-    unsigned int id;
-    psa_driver_hash_context_t ctx;
+    unsigned int MBEDTLS_PRIVATE(id);
+    psa_driver_hash_context_t MBEDTLS_PRIVATE(ctx);
 };
 
-#define PSA_HASH_OPERATION_INIT {0, {0}}
+#define PSA_HASH_OPERATION_INIT { 0, { 0 } }
 static inline struct psa_hash_operation_s psa_hash_operation_init( void )
 {
     const struct psa_hash_operation_s v = PSA_HASH_OPERATION_INIT;
@@ -109,17 +106,17 @@
      * ID values are auto-generated in psa_crypto_driver_wrappers.h
      * ID value zero means the context is not valid or not assigned to
      * any driver (i.e. none of the driver contexts are active). */
-    unsigned int id;
+    unsigned int MBEDTLS_PRIVATE(id);
 
-    unsigned int iv_required : 1;
-    unsigned int iv_set : 1;
+    unsigned int MBEDTLS_PRIVATE(iv_required) : 1;
+    unsigned int MBEDTLS_PRIVATE(iv_set) : 1;
 
-    uint8_t default_iv_length;
+    uint8_t MBEDTLS_PRIVATE(default_iv_length);
 
-    psa_driver_cipher_context_t ctx;
+    psa_driver_cipher_context_t MBEDTLS_PRIVATE(ctx);
 };
 
-#define PSA_CIPHER_OPERATION_INIT {0, 0, 0, 0, {0}}
+#define PSA_CIPHER_OPERATION_INIT { 0, 0, 0, 0, { 0 } }
 static inline struct psa_cipher_operation_s psa_cipher_operation_init( void )
 {
     const struct psa_cipher_operation_s v = PSA_CIPHER_OPERATION_INIT;
@@ -138,13 +135,13 @@
      * ID values are auto-generated in psa_driver_wrappers.h
      * ID value zero means the context is not valid or not assigned to
      * any driver (i.e. none of the driver contexts are active). */
-    unsigned int id;
-    uint8_t mac_size;
-    unsigned int is_sign : 1;
-    psa_driver_mac_context_t ctx;
+    unsigned int MBEDTLS_PRIVATE(id);
+    uint8_t MBEDTLS_PRIVATE(mac_size);
+    unsigned int MBEDTLS_PRIVATE(is_sign) : 1;
+    psa_driver_mac_context_t MBEDTLS_PRIVATE(ctx);
 };
 
-#define PSA_MAC_OPERATION_INIT {0, 0, 0, {0}}
+#define PSA_MAC_OPERATION_INIT { 0, 0, 0, { 0 } }
 static inline struct psa_mac_operation_s psa_mac_operation_init( void )
 {
     const struct psa_mac_operation_s v = PSA_MAC_OPERATION_INIT;
@@ -162,19 +159,19 @@
      * any driver (i.e. none of the driver contexts are active). */
     unsigned int id;
 
-    psa_algorithm_t alg;
-    psa_key_type_t key_type;
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
+    psa_key_type_t MBEDTLS_PRIVATE(key_type);
 
-    size_t ad_remaining;
-    size_t body_remaining;
+    size_t MBEDTLS_PRIVATE(ad_remaining);
+    size_t MBEDTLS_PRIVATE(body_remaining);
 
-    unsigned int nonce_set : 1;
-    unsigned int lengths_set : 1;
-    unsigned int ad_started : 1;
-    unsigned int body_started : 1;
-    unsigned int is_encrypt : 1;
+    unsigned int MBEDTLS_PRIVATE(nonce_set) : 1;
+    unsigned int MBEDTLS_PRIVATE(lengths_set) : 1;
+    unsigned int MBEDTLS_PRIVATE(ad_started) : 1;
+    unsigned int MBEDTLS_PRIVATE(body_started) : 1;
+    unsigned int MBEDTLS_PRIVATE(is_encrypt) : 1;
 
-    psa_driver_aead_context_t ctx;
+    psa_driver_aead_context_t MBEDTLS_PRIVATE(ctx);
 };
 
 #define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0}}
@@ -187,18 +184,18 @@
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF)
 typedef struct
 {
-    uint8_t *info;
-    size_t info_length;
-    psa_mac_operation_t hmac;
-    uint8_t prk[PSA_HASH_MAX_SIZE];
-    uint8_t output_block[PSA_HASH_MAX_SIZE];
+    uint8_t *MBEDTLS_PRIVATE(info);
+    size_t MBEDTLS_PRIVATE(info_length);
+    psa_mac_operation_t MBEDTLS_PRIVATE(hmac);
+    uint8_t MBEDTLS_PRIVATE(prk)[PSA_HASH_MAX_SIZE];
+    uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE];
 #if PSA_HASH_MAX_SIZE > 0xff
 #error "PSA_HASH_MAX_SIZE does not fit in uint8_t"
 #endif
-    uint8_t offset_in_block;
-    uint8_t block_number;
-    unsigned int state : 2;
-    unsigned int info_set : 1;
+    uint8_t MBEDTLS_PRIVATE(offset_in_block);
+    uint8_t MBEDTLS_PRIVATE(block_number);
+    unsigned int MBEDTLS_PRIVATE(state) : 2;
+    unsigned int MBEDTLS_PRIVATE(info_set) : 1;
 } psa_hkdf_key_derivation_t;
 #endif /* MBEDTLS_PSA_BUILTIN_ALG_HKDF */
 
@@ -221,50 +218,51 @@
 
     /* Indicates how many bytes in the current HMAC block have
      * not yet been read by the user. */
-    uint8_t left_in_block;
+    uint8_t MBEDTLS_PRIVATE(left_in_block);
 
     /* The 1-based number of the block. */
-    uint8_t block_number;
+    uint8_t MBEDTLS_PRIVATE(block_number);
 
-    psa_tls12_prf_key_derivation_state_t state;
+    psa_tls12_prf_key_derivation_state_t MBEDTLS_PRIVATE(state);
 
-    uint8_t *secret;
-    size_t secret_length;
-    uint8_t *seed;
-    size_t seed_length;
-    uint8_t *label;
-    size_t label_length;
+    uint8_t *MBEDTLS_PRIVATE(secret);
+    size_t MBEDTLS_PRIVATE(secret_length);
+    uint8_t *MBEDTLS_PRIVATE(seed);
+    size_t MBEDTLS_PRIVATE(seed_length);
+    uint8_t *MBEDTLS_PRIVATE(label);
+    size_t MBEDTLS_PRIVATE(label_length);
 
-    uint8_t Ai[PSA_HASH_MAX_SIZE];
+    uint8_t MBEDTLS_PRIVATE(Ai)[PSA_HASH_MAX_SIZE];
 
-    /* `HMAC_hash( prk, A(i) + seed )` in the notation of RFC 5246, Sect. 5. */
-    uint8_t output_block[PSA_HASH_MAX_SIZE];
+    /* `HMAC_hash( prk, A( i ) + seed )` in the notation of RFC 5246, Sect. 5. */
+    uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE];
 } psa_tls12_prf_key_derivation_t;
 #endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) ||
         * MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */
 
 struct psa_key_derivation_s
 {
-    psa_algorithm_t alg;
-    unsigned int can_output_key : 1;
-    size_t capacity;
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
+    unsigned int MBEDTLS_PRIVATE(can_output_key) : 1;
+    size_t MBEDTLS_PRIVATE(capacity);
     union
     {
         /* Make the union non-empty even with no supported algorithms. */
-        uint8_t dummy;
+        uint8_t MBEDTLS_PRIVATE(dummy);
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF)
-        psa_hkdf_key_derivation_t hkdf;
+        psa_hkdf_key_derivation_t MBEDTLS_PRIVATE(hkdf);
 #endif
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \
     defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS)
-        psa_tls12_prf_key_derivation_t tls12_prf;
+        psa_tls12_prf_key_derivation_t MBEDTLS_PRIVATE(tls12_prf);
 #endif
-    } ctx;
+    } MBEDTLS_PRIVATE(ctx);
 };
 
 /* This only zeroes out the first byte in the union, the rest is unspecified. */
-#define PSA_KEY_DERIVATION_OPERATION_INIT {0, 0, 0, {0}}
-static inline struct psa_key_derivation_s psa_key_derivation_operation_init( void )
+#define PSA_KEY_DERIVATION_OPERATION_INIT { 0, 0, 0, { 0 } }
+static inline struct psa_key_derivation_s psa_key_derivation_operation_init(
+        void )
 {
     const struct psa_key_derivation_s v = PSA_KEY_DERIVATION_OPERATION_INIT;
     return( v );
@@ -272,13 +270,13 @@
 
 struct psa_key_policy_s
 {
-    psa_key_usage_t usage;
-    psa_algorithm_t alg;
-    psa_algorithm_t alg2;
+    psa_key_usage_t MBEDTLS_PRIVATE(usage);
+    psa_algorithm_t MBEDTLS_PRIVATE(alg);
+    psa_algorithm_t MBEDTLS_PRIVATE(alg2);
 };
 typedef struct psa_key_policy_s psa_key_policy_t;
 
-#define PSA_KEY_POLICY_INIT {0, 0, 0}
+#define PSA_KEY_POLICY_INIT { 0, 0, 0 }
 static inline struct psa_key_policy_s psa_key_policy_init( void )
 {
     const struct psa_key_policy_s v = PSA_KEY_POLICY_INIT;
@@ -290,7 +288,7 @@
 typedef uint16_t psa_key_bits_t;
 /* The maximum value of the type used to represent bit-sizes.
  * This is used to mark an invalid key size. */
-#define PSA_KEY_BITS_TOO_LARGE ( (psa_key_bits_t) ( -1 ) )
+#define PSA_KEY_BITS_TOO_LARGE          ( ( psa_key_bits_t ) -1 )
 /* The maximum size of a key in bits.
  * Currently defined as the maximum that can be represented, rounded down
  * to a whole number of bytes.
@@ -323,30 +321,33 @@
 
 typedef struct
 {
-    psa_key_type_t type;
-    psa_key_bits_t bits;
-    psa_key_lifetime_t lifetime;
-    mbedtls_svc_key_id_t id;
-    psa_key_policy_t policy;
-    psa_key_attributes_flag_t flags;
+    psa_key_type_t MBEDTLS_PRIVATE(type);
+    psa_key_bits_t MBEDTLS_PRIVATE(bits);
+    psa_key_lifetime_t MBEDTLS_PRIVATE(lifetime);
+    mbedtls_svc_key_id_t MBEDTLS_PRIVATE(id);
+    psa_key_policy_t MBEDTLS_PRIVATE(policy);
+    psa_key_attributes_flag_t MBEDTLS_PRIVATE(flags);
 } psa_core_key_attributes_t;
 
-#define PSA_CORE_KEY_ATTRIBUTES_INIT {PSA_KEY_TYPE_NONE, 0, PSA_KEY_LIFETIME_VOLATILE, MBEDTLS_SVC_KEY_ID_INIT, PSA_KEY_POLICY_INIT, 0}
+#define PSA_CORE_KEY_ATTRIBUTES_INIT { PSA_KEY_TYPE_NONE, 0,            \
+                                       PSA_KEY_LIFETIME_VOLATILE,       \
+                                       MBEDTLS_SVC_KEY_ID_INIT,         \
+                                       PSA_KEY_POLICY_INIT, 0 }
 
 struct psa_key_attributes_s
 {
-    psa_core_key_attributes_t core;
+    psa_core_key_attributes_t MBEDTLS_PRIVATE(core);
 #if defined(MBEDTLS_PSA_CRYPTO_SE_C)
-    psa_key_slot_number_t slot_number;
+    psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number);
 #endif /* MBEDTLS_PSA_CRYPTO_SE_C */
-    void *domain_parameters;
-    size_t domain_parameters_size;
+    void *MBEDTLS_PRIVATE(domain_parameters);
+    size_t MBEDTLS_PRIVATE(domain_parameters_size);
 };
 
 #if defined(MBEDTLS_PSA_CRYPTO_SE_C)
-#define PSA_KEY_ATTRIBUTES_INIT {PSA_CORE_KEY_ATTRIBUTES_INIT, 0, NULL, 0}
+#define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, 0, NULL, 0 }
 #else
-#define PSA_KEY_ATTRIBUTES_INIT {PSA_CORE_KEY_ATTRIBUTES_INIT, NULL, 0}
+#define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, NULL, 0 }
 #endif
 
 static inline struct psa_key_attributes_s psa_key_attributes_init( void )
@@ -358,13 +359,13 @@
 static inline void psa_set_key_id( psa_key_attributes_t *attributes,
                                    mbedtls_svc_key_id_t key )
 {
-    psa_key_lifetime_t lifetime = attributes->core.lifetime;
+    psa_key_lifetime_t lifetime = attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime);
 
-    attributes->core.id = key;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = key;
 
     if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) )
     {
-        attributes->core.lifetime =
+        attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) =
             PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(
                 PSA_KEY_LIFETIME_PERSISTENT,
                 PSA_KEY_LIFETIME_GET_LOCATION( lifetime ) );
@@ -372,77 +373,87 @@
 }
 
 static inline mbedtls_svc_key_id_t psa_get_key_id(
-    const psa_key_attributes_t *attributes)
+    const psa_key_attributes_t *attributes )
 {
-    return( attributes->core.id );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) );
 }
 
 #ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
 static inline void mbedtls_set_key_owner_id( psa_key_attributes_t *attributes,
                                              mbedtls_key_owner_id_t owner )
 {
-    attributes->core.id.owner = owner;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(owner) = owner;
 }
 #endif
 
-static inline void psa_set_key_lifetime(psa_key_attributes_t *attributes,
-                                        psa_key_lifetime_t lifetime)
+static inline void psa_set_key_lifetime( psa_key_attributes_t *attributes,
+                                        psa_key_lifetime_t lifetime )
 {
-    attributes->core.lifetime = lifetime;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) = lifetime;
     if( PSA_KEY_LIFETIME_IS_VOLATILE( lifetime ) )
     {
 #ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER
-        attributes->core.id.key_id = 0;
+        attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(key_id) = 0;
 #else
-        attributes->core.id = 0;
+        attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = 0;
 #endif
     }
 }
 
 static inline psa_key_lifetime_t psa_get_key_lifetime(
-    const psa_key_attributes_t *attributes)
+    const psa_key_attributes_t *attributes )
 {
-    return( attributes->core.lifetime );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) );
+}
+
+static inline void psa_extend_key_usage_flags( psa_key_usage_t *usage_flags )
+{
+    if( *usage_flags & PSA_KEY_USAGE_SIGN_HASH )
+        *usage_flags |= PSA_KEY_USAGE_SIGN_MESSAGE;
+
+    if( *usage_flags & PSA_KEY_USAGE_VERIFY_HASH )
+        *usage_flags |= PSA_KEY_USAGE_VERIFY_MESSAGE;
 }
 
 static inline void psa_set_key_usage_flags(psa_key_attributes_t *attributes,
                                            psa_key_usage_t usage_flags)
 {
-    attributes->core.policy.usage = usage_flags;
+    psa_extend_key_usage_flags( &usage_flags );
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(usage) = usage_flags;
 }
 
 static inline psa_key_usage_t psa_get_key_usage_flags(
-    const psa_key_attributes_t *attributes)
+    const psa_key_attributes_t *attributes )
 {
-    return( attributes->core.policy.usage );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(usage) );
 }
 
-static inline void psa_set_key_algorithm(psa_key_attributes_t *attributes,
-                                         psa_algorithm_t alg)
+static inline void psa_set_key_algorithm( psa_key_attributes_t *attributes,
+                                         psa_algorithm_t alg )
 {
-    attributes->core.policy.alg = alg;
+    attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg) = alg;
 }
 
 static inline psa_algorithm_t psa_get_key_algorithm(
-    const psa_key_attributes_t *attributes)
+    const psa_key_attributes_t *attributes )
 {
-    return( attributes->core.policy.alg );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg) );
 }
 
 /* This function is declared in crypto_extra.h, which comes after this
  * header file, but we need the function here, so repeat the declaration. */
-psa_status_t psa_set_key_domain_parameters(psa_key_attributes_t *attributes,
+psa_status_t psa_set_key_domain_parameters( psa_key_attributes_t *attributes,
                                            psa_key_type_t type,
                                            const uint8_t *data,
-                                           size_t data_length);
+                                           size_t data_length );
 
-static inline void psa_set_key_type(psa_key_attributes_t *attributes,
-                                    psa_key_type_t type)
+static inline void psa_set_key_type( psa_key_attributes_t *attributes,
+                                    psa_key_type_t type )
 {
-    if( attributes->domain_parameters == NULL )
+    if( attributes->MBEDTLS_PRIVATE(domain_parameters) == NULL )
     {
         /* Common case: quick path */
-        attributes->core.type = type;
+        attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(type) = type;
     }
     else
     {
@@ -455,24 +466,24 @@
 }
 
 static inline psa_key_type_t psa_get_key_type(
-    const psa_key_attributes_t *attributes)
+    const psa_key_attributes_t *attributes )
 {
-    return( attributes->core.type );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(type) );
 }
 
-static inline void psa_set_key_bits(psa_key_attributes_t *attributes,
-                                    size_t bits)
+static inline void psa_set_key_bits( psa_key_attributes_t *attributes,
+                                    size_t bits )
 {
     if( bits > PSA_MAX_KEY_BITS )
-        attributes->core.bits = PSA_KEY_BITS_TOO_LARGE;
+        attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) = PSA_KEY_BITS_TOO_LARGE;
     else
-        attributes->core.bits = (psa_key_bits_t) bits;
+        attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) = (psa_key_bits_t) bits;
 }
 
 static inline size_t psa_get_key_bits(
-    const psa_key_attributes_t *attributes)
+    const psa_key_attributes_t *attributes )
 {
-    return( attributes->core.bits );
+    return( attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) );
 }
 
 #ifdef __cplusplus
diff --git a/include/psa/crypto_types.h b/include/psa/crypto_types.h
index 386c7d7..2cf965d 100644
--- a/include/psa/crypto_types.h
+++ b/include/psa/crypto_types.h
@@ -32,6 +32,7 @@
 
 #ifndef PSA_CRYPTO_TYPES_H
 #define PSA_CRYPTO_TYPES_H
+#include "mbedtls/private_access.h"
 
 #include "crypto_platform.h"
 
@@ -234,8 +235,8 @@
  */
 typedef struct
 {
-    psa_key_id_t key_id;
-    mbedtls_key_owner_id_t owner;
+    psa_key_id_t MBEDTLS_PRIVATE(key_id);
+    mbedtls_key_owner_id_t MBEDTLS_PRIVATE(owner);
 } mbedtls_svc_key_id_t;
 
 #endif /* !MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER */
diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index 497bd8f..daef941 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -33,6 +33,7 @@
 
 #ifndef PSA_CRYPTO_VALUES_H
 #define PSA_CRYPTO_VALUES_H
+#include "mbedtls/private_access.h"
 
 /** \defgroup error Error codes
  * @{
@@ -480,12 +481,6 @@
  * Camellia block cipher. */
 #define PSA_KEY_TYPE_CAMELLIA                       ((psa_key_type_t)0x2403)
 
-/** Key for the RC4 stream cipher.
- *
- * Note that RC4 is weak and deprecated and should only be used in
- * legacy protocols. */
-#define PSA_KEY_TYPE_ARC4                           ((psa_key_type_t)0x2002)
-
 /** Key for the ChaCha20 stream cipher or the Chacha20-Poly1305 AEAD algorithm.
  *
  * ChaCha20 and the ChaCha20_Poly1305 construction are defined in RFC 7539.
@@ -840,7 +835,7 @@
  *
  * \param alg An algorithm identifier (value of type #psa_algorithm_t).
  *
- * \return 1 if \p alg is a key stretching / passowrd hashing algorithm, 0
+ * \return 1 if \p alg is a key stretching / password hashing algorithm, 0
  *         otherwise. This macro may return either 0 or 1 if \p alg is not a
  *         supported algorithm identifier.
  */
@@ -849,10 +844,6 @@
      (alg) & PSA_ALG_KEY_DERIVATION_STRETCHING_FLAG)
 
 #define PSA_ALG_HASH_MASK                       ((psa_algorithm_t)0x000000ff)
-/** MD2 */
-#define PSA_ALG_MD2                             ((psa_algorithm_t)0x02000001)
-/** MD4 */
-#define PSA_ALG_MD4                             ((psa_algorithm_t)0x02000002)
 /** MD5 */
 #define PSA_ALG_MD5                             ((psa_algorithm_t)0x02000003)
 /** PSA_ALG_RIPEMD160 */
@@ -1114,7 +1105,6 @@
  *
  * The underlying stream cipher is determined by the key type.
  * - To use ChaCha20, use a key type of #PSA_KEY_TYPE_CHACHA20.
- * - To use ARC4, use a key type of #PSA_KEY_TYPE_ARC4.
  */
 #define PSA_ALG_STREAM_CIPHER                   ((psa_algorithm_t)0x04800100)
 
@@ -2030,6 +2020,27 @@
     (PSA_KEY_LIFETIME_GET_PERSISTENCE(lifetime) == \
      PSA_KEY_PERSISTENCE_VOLATILE)
 
+/** Whether a key lifetime indicates that the key is read-only.
+ *
+ * Read-only keys cannot be created or destroyed through the PSA Crypto API.
+ * They must be created through platform-specific means that bypass the API.
+ *
+ * Some platforms may offer ways to destroy read-only keys. For example,
+ * consider a platform with multiple levels of privilege, where a
+ * low-privilege application can use a key but is not allowed to destroy
+ * it, and the platform exposes the key to the application with a read-only
+ * lifetime. High-privilege code can destroy the key even though the
+ * application sees the key as read-only.
+ *
+ * \param lifetime      The lifetime value to query (value of type
+ *                      ::psa_key_lifetime_t).
+ *
+ * \return \c 1 if the key is read-only, otherwise \c 0.
+ */
+#define PSA_KEY_LIFETIME_IS_READ_ONLY(lifetime)  \
+    (PSA_KEY_LIFETIME_GET_PERSISTENCE(lifetime) == \
+     PSA_KEY_PERSISTENCE_READ_ONLY)
+
 /** Construct a lifetime from a persistence level and a location.
  *
  * \param persistence   The persistence level
@@ -2124,8 +2135,8 @@
 static inline mbedtls_svc_key_id_t mbedtls_svc_key_id_make(
     mbedtls_key_owner_id_t owner_id, psa_key_id_t key_id )
 {
-    return( (mbedtls_svc_key_id_t){ .key_id = key_id,
-                                    .owner = owner_id } );
+    return( (mbedtls_svc_key_id_t){ .MBEDTLS_PRIVATE(key_id) = key_id,
+                                    .MBEDTLS_PRIVATE(owner) = owner_id } );
 }
 
 /** Compare two key identifiers.
@@ -2138,8 +2149,8 @@
 static inline int mbedtls_svc_key_id_equal( mbedtls_svc_key_id_t id1,
                                             mbedtls_svc_key_id_t id2 )
 {
-    return( ( id1.key_id == id2.key_id ) &&
-            mbedtls_key_owner_id_equal( id1.owner, id2.owner ) );
+    return( ( id1.MBEDTLS_PRIVATE(key_id) == id2.MBEDTLS_PRIVATE(key_id) ) &&
+            mbedtls_key_owner_id_equal( id1.MBEDTLS_PRIVATE(owner), id2.MBEDTLS_PRIVATE(owner) ) );
 }
 
 /** Check whether a key identifier is null.
@@ -2150,7 +2161,7 @@
  */
 static inline int mbedtls_svc_key_id_is_null( mbedtls_svc_key_id_t key )
 {
-    return( ( key.key_id == 0 ) && ( key.owner == 0 ) );
+    return( key.MBEDTLS_PRIVATE(key_id) == 0 );
 }
 
 #endif /* !MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER */
@@ -2255,12 +2266,14 @@
 /** Whether the key may be used to derive other keys or produce a password
  * hash.
  *
- * This flag allows the key to be used as the input of
- * psa_key_derivation_input_key() at the step
- * #PSA_KEY_DERIVATION_INPUT_SECRET of #PSA_KEY_DERIVATION_INPUT_PASSWORD
- * depending on the algorithm, and allows the use of
- * psa_key_derivation_output_bytes() or psa_key_derivation_output_key()
- * at the end of the operation.
+ * This flag allows the key to be used for a key derivation operation or for
+ * a key agreement operation, if otherwise permitted by by the key's type and
+ * policy.
+ *
+ * If this flag is present on all keys used in calls to
+ * psa_key_derivation_input_key() for a key derivation operation, then it
+ * permits calling psa_key_derivation_output_bytes() or
+ * psa_key_derivation_output_key() at the end of the operation.
  */
 #define PSA_KEY_USAGE_DERIVE                    ((psa_key_usage_t)0x00004000)
 
@@ -2269,14 +2282,13 @@
  *
  * This flag allows the key to be used:
  *
- * - for a key of type #PSA_KEY_TYPE_PASSWORD_HASH, as the \c key argument of
- *   psa_key_derivation_verify_key();
- * - for a key of type #PSA_KEY_TYPE_PASSWORD (or #PSA_KEY_TYPE_DERIVE), as
- *   the input to psa_key_derivation_input_key() at the step
- *   #PSA_KEY_DERIVATION_INPUT_PASSWORD (or #PSA_KEY_DERIVATION_INPUT_SECRET);
- *   then at the end of the operation use of psa_key_derivation_verify_bytes()
- *   or psa_key_derivation_verify_key() will be permitted (but not
- *   psa_key_derivation_output_xxx() unless #PSA_KEY_USAGE_DERIVE is set).
+ * This flag allows the key to be used in a key derivation operation, if
+ * otherwise permitted by by the key's type and policy.
+ *
+ * If this flag is present on all keys used in calls to
+ * psa_key_derivation_input_key() for a key derivation operation, then it
+ * permits calling psa_key_derivation_verify_bytes() or
+ * psa_key_derivation_verify_key() at the end of the operation.
  */
 #define PSA_KEY_USAGE_VERIFY_DERIVATION         ((psa_key_usage_t)0x00008000)
 
@@ -2295,11 +2307,11 @@
  *
  * The secret can also be a direct input (passed to
  * key_derivation_input_bytes()). In this case, the derivation operation
- * may not be used to derive or verify keys: the operation will only allow
- * psa_key_derivation_output_bytes() or
- * psa_key_derivation_verify_bytes() but not
- * psa_key_derivation_output_key() or
- * psa_key_derivation_verify_key().
+ * may not be used to derive keys: the operation will only allow
+ * psa_key_derivation_output_bytes(),
+ * psa_key_derivation_verify_bytes(), or
+ * psa_key_derivation_verify_key(), but not
+ * psa_key_derivation_output_key().
  */
 #define PSA_KEY_DERIVATION_INPUT_SECRET     ((psa_key_derivation_step_t)0x0101)
 
@@ -2313,11 +2325,11 @@
  *
  * The secret can also be a direct input (passed to
  * key_derivation_input_bytes()). In this case, the derivation operation
- * may not be used to derive or verify keys: the operation will only allow
- * psa_key_derivation_output_bytes() or
- * psa_key_derivation_verify_bytes(), not
- * psa_key_derivation_output_key() or
- * psa_key_derivation_verify_key().
+ * may not be used to derive keys: the operation will only allow
+ * psa_key_derivation_output_bytes(),
+ * psa_key_derivation_verify_bytes(), or
+ * psa_key_derivation_verify_key(), but not
+ * psa_key_derivation_output_key().
  */
 #define PSA_KEY_DERIVATION_INPUT_PASSWORD   ((psa_key_derivation_step_t)0x0102)