diff --git a/ChangeLog b/ChangeLog
index 4340b42..7f41783 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,9 +3,76 @@
 = mbed TLS 2.x.x branch released xxxx-xx-xx
 
 Security
+   * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for
+     certificate verification. SHA-1 can be turned back on with a compile-time
+     option if needed.
+   * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to
+     detect it sometimes. Reported by Hugo Leisink. #810
+   * Tighten ASN.1 parsing of RSA PKCS#1 v1.5 signatures, to avoid a
+     potential Bleichenbacher-style attack.
    * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a
      potential Bleichenbacher/BERserk-style attack.
 
+Bugfix
+   * Remove invalid use of size zero arrays in ECJPAKE test suite.
+   * Fix insufficient support for signature-hash-algorithm extension,
+     resulting in compatibility problems with Chrome. Found by hfloyrd. #823
+   * If sending a fatal alert fails, make sure not to hide the error
+     that triggered the alert.
+   * In SSLv3, if refusing a renegotiation attempt, don't process any further
+     data.
+   * Accept empty trusted CA chain in authentication mode
+     MBEDTLS_SSL_VERIFY_OPTIONAL.
+     Fixes #864. Found by jethrogb.
+   * Fix implementation of mbedtls_ssl_parse_certificate
+     to not annihilate fatal errors in authentication mode
+     MBEDTLS_SSL_VERIFY_OPTIONAL and to reflect bad EC curves
+     within verification result.
+   * Fix modular inversion function on invalid modulus 1.
+     Found by blaufish. Fixes #641.
+   * Fix incorrect sign computation in modular exponentiation
+     when dealing with negative MPI. Found by Guido Vranken.
+   * Fix potential stack underflow in mpi_read_file.
+     Found by Guido Vranken.
+
+Changes
+   * Send fatal alerts in many more cases instead of dropping the connection.
+   * Clarify ECDSA documentation and improve the sample code to avoid
+     misunderstandings and potentially dangerous use of the API. Pointed out
+     by Jean-Philippe Aumasson.
+
+= mbed TLS 2.5.0 branch released 2017-05-17
+
+Security
+   * Wipe stack buffers in RSA private key operations
+     (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt).
+     Found by Laurent Simon.
+   * Add exponent blinding to RSA private operations as a countermeasure
+     against side-channel attacks like the cache attack described in
+     https://arxiv.org/abs/1702.08719v2.
+     Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss,
+     Clémentine Maurice and Stefan Mangard.
+
+Features
+   * Exposed parts of the Elliptic Curve Point internal interface, to provide
+     interface for external hardware acceleration code.
+   * Add a new configuration option to 'mbedtls_ssl_config' to enable
+     suppressing the CA list in Certificate Request messages. The default
+     behaviour has not changed, namely every configured CAs name is included.
+
+API Changes
+   * The following functions in the AES module have been deprecated and replaced
+     by the functions shown below. The new functions change the return type from
+     void to int to allow returning error codes when using MBEDTLS_AES_ALT,
+     MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT.
+     mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt()
+     mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt()
+
+Bugfix
+   * Remove macros from compat-1.3.h that correspond to deleted items from most
+     recent versions of the library. Found by Kyle Keen.
+   * Fixed issue in mutexes to failing to initialise. #667
+
 = mbed TLS 2.4.2 branch released 2017-03-08
 
 Security
diff --git a/doxygen/input/doc_mainpage.h b/doxygen/input/doc_mainpage.h
index 0794167..b8a7a29 100644
--- a/doxygen/input/doc_mainpage.h
+++ b/doxygen/input/doc_mainpage.h
@@ -21,7 +21,7 @@
  */
 
 /**
- * @mainpage mbed TLS v2.4.1 source code documentation
+ * @mainpage mbed TLS v2.5.0 source code documentation
  *
  * This documentation describes the internal structure of mbed TLS.  It was
  * automatically generated from specially formatted comment blocks in
diff --git a/doxygen/mbedtls.doxyfile b/doxygen/mbedtls.doxyfile
index e58794e..b52f05c 100644
--- a/doxygen/mbedtls.doxyfile
+++ b/doxygen/mbedtls.doxyfile
@@ -28,7 +28,7 @@
 # identify the project. Note that if you do not use Doxywizard you need
 # to put quotes around the project name if it contains spaces.
 
-PROJECT_NAME           = "mbed TLS v2.4.1"
+PROJECT_NAME           = "mbed TLS v2.5.0"
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number.
 # This could be handy for archiving the generated documentation or
diff --git a/include/mbedtls/aes.h b/include/mbedtls/aes.h
index a36e825..b5560cc 100644
--- a/include/mbedtls/aes.h
+++ b/include/mbedtls/aes.h
@@ -39,6 +39,11 @@
 #define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH                -0x0020  /**< Invalid key length. */
 #define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH              -0x0022  /**< Invalid data input length. */
 
+#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
+    !defined(inline) && !defined(__cplusplus)
+#define inline __inline
+#endif
+
 #if !defined(MBEDTLS_AES_ALT)
 // Regular implementation
 //
@@ -253,10 +258,12 @@
  * \param ctx       AES context
  * \param input     Plaintext block
  * \param output    Output (ciphertext) block
+ *
+ * \return          0 if successful
  */
-void mbedtls_aes_encrypt( mbedtls_aes_context *ctx,
-                          const unsigned char input[16],
-                          unsigned char output[16] );
+int mbedtls_internal_aes_encrypt( mbedtls_aes_context *ctx,
+                                  const unsigned char input[16],
+                                  unsigned char output[16] );
 
 /**
  * \brief           Internal AES block decryption function
@@ -266,10 +273,59 @@
  * \param ctx       AES context
  * \param input     Ciphertext block
  * \param output    Output (plaintext) block
+ *
+ * \return          0 if successful
  */
-void mbedtls_aes_decrypt( mbedtls_aes_context *ctx,
-                          const unsigned char input[16],
-                          unsigned char output[16] );
+int mbedtls_internal_aes_decrypt( mbedtls_aes_context *ctx,
+                                  const unsigned char input[16],
+                                  unsigned char output[16] );
+
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#define MBEDTLS_DEPRECATED      __attribute__((deprecated))
+#else
+#define MBEDTLS_DEPRECATED
+#endif
+/**
+ * \brief           Internal AES block encryption function
+ *                  (Only exposed to allow overriding it,
+ *                  see MBEDTLS_AES_ENCRYPT_ALT)
+ *
+ * \deprecated      Superseded by mbedtls_aes_encrypt_ext() in 2.5.0
+ *
+ * \param ctx       AES context
+ * \param input     Plaintext block
+ * \param output    Output (ciphertext) block
+ */
+MBEDTLS_DEPRECATED static inline void mbedtls_aes_encrypt(
+                                                mbedtls_aes_context *ctx,
+                                                const unsigned char input[16],
+                                                unsigned char output[16] )
+{
+    mbedtls_internal_aes_encrypt( ctx, input, output );
+}
+
+/**
+ * \brief           Internal AES block decryption function
+ *                  (Only exposed to allow overriding it,
+ *                  see MBEDTLS_AES_DECRYPT_ALT)
+ *
+ * \deprecated      Superseded by mbedtls_aes_decrypt_ext() in 2.5.0
+ *
+ * \param ctx       AES context
+ * \param input     Ciphertext block
+ * \param output    Output (plaintext) block
+ */
+MBEDTLS_DEPRECATED static inline void mbedtls_aes_decrypt(
+                                                mbedtls_aes_context *ctx,
+                                                const unsigned char input[16],
+                                                unsigned char output[16] )
+{
+    mbedtls_internal_aes_decrypt( ctx, input, output );
+}
+
+#undef MBEDTLS_DEPRECATED
+#endif /* !MBEDTLS_DEPRECATED_REMOVED */
 
 #ifdef __cplusplus
 }
diff --git a/include/mbedtls/bignum.h b/include/mbedtls/bignum.h
index aa51556..1a5b4b6 100644
--- a/include/mbedtls/bignum.h
+++ b/include/mbedtls/bignum.h
@@ -340,7 +340,7 @@
 
 #if defined(MBEDTLS_FS_IO)
 /**
- * \brief          Read X from an opened file
+ * \brief          Read MPI from a line in an opened file
  *
  * \param X        Destination MPI
  * \param radix    Input numeric base
@@ -349,6 +349,15 @@
  * \return         0 if successful, MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if
  *                 the file read buffer is too small or a
  *                 MBEDTLS_ERR_MPI_XXX error code
+ *
+ * \note           On success, this function advances the file stream
+ *                 to the end of the current line or to EOF.
+ *
+ *                 The function returns 0 on an empty line.
+ *
+ *                 Leading whitespaces are ignored, as is a
+ *                 '0x' prefix for radix 16.
+ *
  */
 int mbedtls_mpi_read_file( mbedtls_mpi *X, int radix, FILE *fin );
 
@@ -665,8 +674,8 @@
  *
  * \return         0 if successful,
  *                 MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
- *                 MBEDTLS_ERR_MPI_BAD_INPUT_DATA if N is negative or nil
-                   MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N
+ *                 MBEDTLS_ERR_MPI_BAD_INPUT_DATA if N is <= 1,
+                   MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N.
  */
 int mbedtls_mpi_inv_mod( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *N );
 
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index fe86c1e..dab1113 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -150,6 +150,38 @@
 #error "MBEDTLS_GCM_C defined, but not all prerequisites"
 #endif
 
+#if defined(MBEDTLS_ECP_RANDOMIZE_JAC_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_RANDOMIZE_JAC_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_ADD_MIXED_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_ADD_MIXED_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_DOUBLE_JAC_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_DOUBLE_JAC_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_NORMALIZE_JAC_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_RANDOMIZE_MXZ_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_RANDOMIZE_MXZ_ALT defined, but not all prerequisites"
+#endif
+
+#if defined(MBEDTLS_ECP_NORMALIZE_MXZ_ALT) && !defined(MBEDTLS_ECP_INTERNAL_ALT)
+#error "MBEDTLS_ECP_NORMALIZE_MXZ_ALT defined, but not all prerequisites"
+#endif
+
 #if defined(MBEDTLS_HAVEGE_C) && !defined(MBEDTLS_TIMING_C)
 #error "MBEDTLS_HAVEGE_C defined, but not all prerequisites"
 #endif
diff --git a/include/mbedtls/compat-1.3.h b/include/mbedtls/compat-1.3.h
index af51b5f..bba1d2c 100644
--- a/include/mbedtls/compat-1.3.h
+++ b/include/mbedtls/compat-1.3.h
@@ -207,9 +207,6 @@
 #if defined MBEDTLS_ERROR_C
 #define POLARSSL_ERROR_C MBEDTLS_ERROR_C
 #endif
-#if defined MBEDTLS_ERROR_STRERROR_BC
-#define POLARSSL_ERROR_STRERROR_BC MBEDTLS_ERROR_STRERROR_BC
-#endif
 #if defined MBEDTLS_ERROR_STRERROR_DUMMY
 #define POLARSSL_ERROR_STRERROR_DUMMY MBEDTLS_ERROR_STRERROR_DUMMY
 #endif
@@ -318,9 +315,6 @@
 #if defined MBEDTLS_MEMORY_BUFFER_ALLOC_C
 #define POLARSSL_MEMORY_BUFFER_ALLOC_C MBEDTLS_MEMORY_BUFFER_ALLOC_C
 #endif
-#if defined MBEDTLS_MEMORY_C
-#define POLARSSL_MEMORY_C MBEDTLS_MEMORY_C
-#endif
 #if defined MBEDTLS_MEMORY_DEBUG
 #define POLARSSL_MEMORY_DEBUG MBEDTLS_MEMORY_DEBUG
 #endif
@@ -345,9 +339,6 @@
 #if defined MBEDTLS_PADLOCK_C
 #define POLARSSL_PADLOCK_C MBEDTLS_PADLOCK_C
 #endif
-#if defined MBEDTLS_PBKDF2_C
-#define POLARSSL_PBKDF2_C MBEDTLS_PBKDF2_C
-#endif
 #if defined MBEDTLS_PEM_PARSE_C
 #define POLARSSL_PEM_PARSE_C MBEDTLS_PEM_PARSE_C
 #endif
@@ -429,9 +420,6 @@
 #if defined MBEDTLS_PLATFORM_STD_FREE
 #define POLARSSL_PLATFORM_STD_FREE MBEDTLS_PLATFORM_STD_FREE
 #endif
-#if defined MBEDTLS_PLATFORM_STD_MALLOC
-#define POLARSSL_PLATFORM_STD_MALLOC MBEDTLS_PLATFORM_STD_MALLOC
-#endif
 #if defined MBEDTLS_PLATFORM_STD_MEM_HDR
 #define POLARSSL_PLATFORM_STD_MEM_HDR MBEDTLS_PLATFORM_STD_MEM_HDR
 #endif
@@ -492,12 +480,6 @@
 #if defined MBEDTLS_SHA512_PROCESS_ALT
 #define POLARSSL_SHA512_PROCESS_ALT MBEDTLS_SHA512_PROCESS_ALT
 #endif
-#if defined MBEDTLS_SSL_AEAD_RANDOM_IV
-#define POLARSSL_SSL_AEAD_RANDOM_IV MBEDTLS_SSL_AEAD_RANDOM_IV
-#endif
-#if defined MBEDTLS_SSL_ALERT_MESSAGES
-#define POLARSSL_SSL_ALERT_MESSAGES MBEDTLS_SSL_ALERT_MESSAGES
-#endif
 #if defined MBEDTLS_SSL_ALL_ALERT_MESSAGES
 #define POLARSSL_SSL_ALL_ALERT_MESSAGES MBEDTLS_SSL_ALL_ALERT_MESSAGES
 #endif
@@ -522,9 +504,6 @@
 #if defined MBEDTLS_SSL_DEBUG_ALL
 #define POLARSSL_SSL_DEBUG_ALL MBEDTLS_SSL_DEBUG_ALL
 #endif
-#if defined MBEDTLS_SSL_DISABLE_RENEGOTIATION
-#define POLARSSL_SSL_DISABLE_RENEGOTIATION MBEDTLS_SSL_DISABLE_RENEGOTIATION
-#endif
 #if defined MBEDTLS_SSL_DTLS_ANTI_REPLAY
 #define POLARSSL_SSL_DTLS_ANTI_REPLAY MBEDTLS_SSL_DTLS_ANTI_REPLAY
 #endif
@@ -752,7 +731,6 @@
 #define KU_KEY_ENCIPHERMENT MBEDTLS_X509_KU_KEY_ENCIPHERMENT
 #define KU_NON_REPUDIATION MBEDTLS_X509_KU_NON_REPUDIATION
 #define LN_2_DIV_LN_10_SCALE100 MBEDTLS_LN_2_DIV_LN_10_SCALE100
-#define MD_CONTEXT_T_INIT MBEDTLS_MD_CONTEXT_T_INIT
 #define MEMORY_VERIFY_ALLOC MBEDTLS_MEMORY_VERIFY_ALLOC
 #define MEMORY_VERIFY_ALWAYS MBEDTLS_MEMORY_VERIFY_ALWAYS
 #define MEMORY_VERIFY_FREE MBEDTLS_MEMORY_VERIFY_FREE
@@ -1017,19 +995,13 @@
 #define POLARSSL_CONFIG_H MBEDTLS_CONFIG_H
 #define POLARSSL_CTR_DRBG_H MBEDTLS_CTR_DRBG_H
 #define POLARSSL_DEBUG_H MBEDTLS_DEBUG_H
-#define POLARSSL_DEBUG_LOG_FULL MBEDTLS_DEBUG_LOG_FULL
-#define POLARSSL_DEBUG_LOG_RAW MBEDTLS_DEBUG_LOG_RAW
 #define POLARSSL_DECRYPT MBEDTLS_DECRYPT
 #define POLARSSL_DES_H MBEDTLS_DES_H
 #define POLARSSL_DHM_H MBEDTLS_DHM_H
-#define POLARSSL_DHM_RFC2409_MODP_1024_G MBEDTLS_DHM_RFC2409_MODP_1024_G
-#define POLARSSL_DHM_RFC2409_MODP_1024_P MBEDTLS_DHM_RFC2409_MODP_1024_P
 #define POLARSSL_DHM_RFC3526_MODP_2048_G MBEDTLS_DHM_RFC3526_MODP_2048_G
 #define POLARSSL_DHM_RFC3526_MODP_2048_P MBEDTLS_DHM_RFC3526_MODP_2048_P
 #define POLARSSL_DHM_RFC3526_MODP_3072_G MBEDTLS_DHM_RFC3526_MODP_3072_G
 #define POLARSSL_DHM_RFC3526_MODP_3072_P MBEDTLS_DHM_RFC3526_MODP_3072_P
-#define POLARSSL_DHM_RFC5114_MODP_1024_G MBEDTLS_DHM_RFC5114_MODP_1024_G
-#define POLARSSL_DHM_RFC5114_MODP_1024_P MBEDTLS_DHM_RFC5114_MODP_1024_P
 #define POLARSSL_DHM_RFC5114_MODP_2048_G MBEDTLS_DHM_RFC5114_MODP_2048_G
 #define POLARSSL_DHM_RFC5114_MODP_2048_P MBEDTLS_DHM_RFC5114_MODP_2048_P
 #define POLARSSL_ECDH_H MBEDTLS_ECDH_H
@@ -1117,9 +1089,6 @@
 #define POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR
 #define POLARSSL_ERR_HMAC_DRBG_INPUT_TOO_BIG MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG
 #define POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG
-#define POLARSSL_ERR_MD2_FILE_IO_ERROR MBEDTLS_ERR_MD2_FILE_IO_ERROR
-#define POLARSSL_ERR_MD4_FILE_IO_ERROR MBEDTLS_ERR_MD4_FILE_IO_ERROR
-#define POLARSSL_ERR_MD5_FILE_IO_ERROR MBEDTLS_ERR_MD5_FILE_IO_ERROR
 #define POLARSSL_ERR_MD_ALLOC_FAILED MBEDTLS_ERR_MD_ALLOC_FAILED
 #define POLARSSL_ERR_MD_BAD_INPUT_DATA MBEDTLS_ERR_MD_BAD_INPUT_DATA
 #define POLARSSL_ERR_MD_FEATURE_UNAVAILABLE MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE
@@ -1147,7 +1116,6 @@
 #define POLARSSL_ERR_OID_BUF_TOO_SMALL MBEDTLS_ERR_OID_BUF_TOO_SMALL
 #define POLARSSL_ERR_OID_NOT_FOUND MBEDTLS_ERR_OID_NOT_FOUND
 #define POLARSSL_ERR_PADLOCK_DATA_MISALIGNED MBEDTLS_ERR_PADLOCK_DATA_MISALIGNED
-#define POLARSSL_ERR_PBKDF2_BAD_INPUT_DATA MBEDTLS_ERR_PBKDF2_BAD_INPUT_DATA
 #define POLARSSL_ERR_PEM_BAD_INPUT_DATA MBEDTLS_ERR_PEM_BAD_INPUT_DATA
 #define POLARSSL_ERR_PEM_FEATURE_UNAVAILABLE MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE
 #define POLARSSL_ERR_PEM_INVALID_DATA MBEDTLS_ERR_PEM_INVALID_DATA
@@ -1179,7 +1147,6 @@
 #define POLARSSL_ERR_PK_TYPE_MISMATCH MBEDTLS_ERR_PK_TYPE_MISMATCH
 #define POLARSSL_ERR_PK_UNKNOWN_NAMED_CURVE MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE
 #define POLARSSL_ERR_PK_UNKNOWN_PK_ALG MBEDTLS_ERR_PK_UNKNOWN_PK_ALG
-#define POLARSSL_ERR_RIPEMD160_FILE_IO_ERROR MBEDTLS_ERR_RIPEMD160_FILE_IO_ERROR
 #define POLARSSL_ERR_RSA_BAD_INPUT_DATA MBEDTLS_ERR_RSA_BAD_INPUT_DATA
 #define POLARSSL_ERR_RSA_INVALID_PADDING MBEDTLS_ERR_RSA_INVALID_PADDING
 #define POLARSSL_ERR_RSA_KEY_CHECK_FAILED MBEDTLS_ERR_RSA_KEY_CHECK_FAILED
@@ -1189,9 +1156,6 @@
 #define POLARSSL_ERR_RSA_PUBLIC_FAILED MBEDTLS_ERR_RSA_PUBLIC_FAILED
 #define POLARSSL_ERR_RSA_RNG_FAILED MBEDTLS_ERR_RSA_RNG_FAILED
 #define POLARSSL_ERR_RSA_VERIFY_FAILED MBEDTLS_ERR_RSA_VERIFY_FAILED
-#define POLARSSL_ERR_SHA1_FILE_IO_ERROR MBEDTLS_ERR_SHA1_FILE_IO_ERROR
-#define POLARSSL_ERR_SHA256_FILE_IO_ERROR MBEDTLS_ERR_SHA256_FILE_IO_ERROR
-#define POLARSSL_ERR_SHA512_FILE_IO_ERROR MBEDTLS_ERR_SHA512_FILE_IO_ERROR
 #define POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE
 #define POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST
 #define POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY
@@ -1305,7 +1269,6 @@
 #define POLARSSL_MD_SHA512 MBEDTLS_MD_SHA512
 #define POLARSSL_MD_WRAP_H MBEDTLS_MD_WRAP_H
 #define POLARSSL_MEMORY_BUFFER_ALLOC_H MBEDTLS_MEMORY_BUFFER_ALLOC_H
-#define POLARSSL_MEMORY_H MBEDTLS_MEMORY_H
 #define POLARSSL_MODE_CBC MBEDTLS_MODE_CBC
 #define POLARSSL_MODE_CCM MBEDTLS_MODE_CCM
 #define POLARSSL_MODE_CFB MBEDTLS_MODE_CFB
@@ -1319,7 +1282,7 @@
 #define POLARSSL_MPI_MAX_BITS_SCALE100 MBEDTLS_MPI_MAX_BITS_SCALE100
 #define POLARSSL_MPI_MAX_LIMBS MBEDTLS_MPI_MAX_LIMBS
 #define POLARSSL_MPI_RW_BUFFER_SIZE MBEDTLS_MPI_RW_BUFFER_SIZE
-#define POLARSSL_NET_H MBEDTLS_NET_H
+#define POLARSSL_NET_H MBEDTLS_NET_SOCKETS_H
 #define POLARSSL_NET_LISTEN_BACKLOG MBEDTLS_NET_LISTEN_BACKLOG
 #define POLARSSL_OID_H MBEDTLS_OID_H
 #define POLARSSL_OPERATION_NONE MBEDTLS_OPERATION_NONE
@@ -1329,7 +1292,6 @@
 #define POLARSSL_PADDING_ZEROS MBEDTLS_PADDING_ZEROS
 #define POLARSSL_PADDING_ZEROS_AND_LEN MBEDTLS_PADDING_ZEROS_AND_LEN
 #define POLARSSL_PADLOCK_H MBEDTLS_PADLOCK_H
-#define POLARSSL_PBKDF2_H MBEDTLS_PBKDF2_H
 #define POLARSSL_PEM_H MBEDTLS_PEM_H
 #define POLARSSL_PKCS11_H MBEDTLS_PKCS11_H
 #define POLARSSL_PKCS12_H MBEDTLS_PKCS12_H
@@ -1712,7 +1674,6 @@
 #define TLS_RSA_WITH_NULL_SHA256 MBEDTLS_TLS_RSA_WITH_NULL_SHA256
 #define TLS_RSA_WITH_RC4_128_MD5 MBEDTLS_TLS_RSA_WITH_RC4_128_MD5
 #define TLS_RSA_WITH_RC4_128_SHA MBEDTLS_TLS_RSA_WITH_RC4_128_SHA
-#define UL64 MBEDTLS_UL64
 #define X509_CRT_VERSION_1 MBEDTLS_X509_CRT_VERSION_1
 #define X509_CRT_VERSION_2 MBEDTLS_X509_CRT_VERSION_2
 #define X509_CRT_VERSION_3 MBEDTLS_X509_CRT_VERSION_3
@@ -1736,7 +1697,6 @@
 #define _ssl_key_cert mbedtls_ssl_key_cert
 #define _ssl_premaster_secret mbedtls_ssl_premaster_secret
 #define _ssl_session mbedtls_ssl_session
-#define _ssl_ticket_keys mbedtls_ssl_ticket_keys
 #define _ssl_transform mbedtls_ssl_transform
 #define _x509_crl mbedtls_x509_crl
 #define _x509_crl_entry mbedtls_x509_crl_entry
@@ -1836,7 +1796,6 @@
 #define cipher_definitions mbedtls_cipher_definitions
 #define cipher_finish mbedtls_cipher_finish
 #define cipher_free mbedtls_cipher_free
-#define cipher_free_ctx mbedtls_cipher_free_ctx
 #define cipher_get_block_size mbedtls_cipher_get_block_size
 #define cipher_get_cipher_mode mbedtls_cipher_get_cipher_mode
 #define cipher_get_iv_size mbedtls_cipher_get_iv_size
@@ -1855,7 +1814,6 @@
 #define cipher_mode_t mbedtls_cipher_mode_t
 #define cipher_padding_t mbedtls_cipher_padding_t
 #define cipher_reset mbedtls_cipher_reset
-#define cipher_self_test mbedtls_cipher_self_test
 #define cipher_set_iv mbedtls_cipher_set_iv
 #define cipher_set_padding_mode mbedtls_cipher_set_padding_mode
 #define cipher_setkey mbedtls_cipher_setkey
@@ -1866,7 +1824,6 @@
 #define ctr_drbg_context mbedtls_ctr_drbg_context
 #define ctr_drbg_free mbedtls_ctr_drbg_free
 #define ctr_drbg_init mbedtls_ctr_drbg_init
-#define ctr_drbg_init_entropy_len mbedtls_ctr_drbg_init_entropy_len
 #define ctr_drbg_random mbedtls_ctr_drbg_random
 #define ctr_drbg_random_with_add mbedtls_ctr_drbg_random_with_add
 #define ctr_drbg_reseed mbedtls_ctr_drbg_reseed
@@ -1877,14 +1834,12 @@
 #define ctr_drbg_update mbedtls_ctr_drbg_update
 #define ctr_drbg_update_seed_file mbedtls_ctr_drbg_update_seed_file
 #define ctr_drbg_write_seed_file mbedtls_ctr_drbg_write_seed_file
-#define debug_fmt mbedtls_debug_fmt
 #define debug_print_buf mbedtls_debug_print_buf
 #define debug_print_crt mbedtls_debug_print_crt
 #define debug_print_ecp mbedtls_debug_print_ecp
 #define debug_print_mpi mbedtls_debug_print_mpi
 #define debug_print_msg mbedtls_debug_print_msg
 #define debug_print_ret mbedtls_debug_print_ret
-#define debug_set_log_mode mbedtls_debug_set_log_mode
 #define debug_set_threshold mbedtls_debug_set_threshold
 #define des3_context mbedtls_des3_context
 #define des3_crypt_cbc mbedtls_des3_crypt_cbc
@@ -1928,7 +1883,6 @@
 #define ecdh_make_public mbedtls_ecdh_make_public
 #define ecdh_read_params mbedtls_ecdh_read_params
 #define ecdh_read_public mbedtls_ecdh_read_public
-#define ecdh_self_test mbedtls_ecdh_self_test
 #define ecdh_side mbedtls_ecdh_side
 #define ecdsa_context mbedtls_ecdsa_context
 #define ecdsa_free mbedtls_ecdsa_free
@@ -1937,7 +1891,6 @@
 #define ecdsa_info mbedtls_ecdsa_info
 #define ecdsa_init mbedtls_ecdsa_init
 #define ecdsa_read_signature mbedtls_ecdsa_read_signature
-#define ecdsa_self_test mbedtls_ecdsa_self_test
 #define ecdsa_sign mbedtls_ecdsa_sign
 #define ecdsa_sign_det mbedtls_ecdsa_sign_det
 #define ecdsa_verify mbedtls_ecdsa_verify
@@ -1945,7 +1898,6 @@
 #define ecdsa_write_signature_det mbedtls_ecdsa_write_signature_det
 #define eckey_info mbedtls_eckey_info
 #define eckeydh_info mbedtls_eckeydh_info
-#define ecp_add mbedtls_ecp_add
 #define ecp_check_privkey mbedtls_ecp_check_privkey
 #define ecp_check_pub_priv mbedtls_ecp_check_pub_priv
 #define ecp_check_pubkey mbedtls_ecp_check_pubkey
@@ -1962,7 +1914,6 @@
 #define ecp_group_free mbedtls_ecp_group_free
 #define ecp_group_id mbedtls_ecp_group_id
 #define ecp_group_init mbedtls_ecp_group_init
-#define ecp_group_read_string mbedtls_ecp_group_read_string
 #define ecp_grp_id_list mbedtls_ecp_grp_id_list
 #define ecp_is_zero mbedtls_ecp_is_zero
 #define ecp_keypair mbedtls_ecp_keypair
@@ -1977,7 +1928,6 @@
 #define ecp_point_write_binary mbedtls_ecp_point_write_binary
 #define ecp_self_test mbedtls_ecp_self_test
 #define ecp_set_zero mbedtls_ecp_set_zero
-#define ecp_sub mbedtls_ecp_sub
 #define ecp_tls_read_group mbedtls_ecp_tls_read_group
 #define ecp_tls_read_point mbedtls_ecp_tls_read_point
 #define ecp_tls_write_group mbedtls_ecp_tls_write_group
@@ -2015,7 +1965,6 @@
 #define hmac_drbg_context mbedtls_hmac_drbg_context
 #define hmac_drbg_free mbedtls_hmac_drbg_free
 #define hmac_drbg_init mbedtls_hmac_drbg_init
-#define hmac_drbg_init_buf mbedtls_hmac_drbg_init_buf
 #define hmac_drbg_random mbedtls_hmac_drbg_random
 #define hmac_drbg_random_with_add mbedtls_hmac_drbg_random_with_add
 #define hmac_drbg_reseed mbedtls_hmac_drbg_reseed
@@ -2031,14 +1980,8 @@
 #define md mbedtls_md
 #define md2 mbedtls_md2
 #define md2_context mbedtls_md2_context
-#define md2_file mbedtls_md2_file
 #define md2_finish mbedtls_md2_finish
 #define md2_free mbedtls_md2_free
-#define md2_hmac mbedtls_md2_hmac
-#define md2_hmac_finish mbedtls_md2_hmac_finish
-#define md2_hmac_reset mbedtls_md2_hmac_reset
-#define md2_hmac_starts mbedtls_md2_hmac_starts
-#define md2_hmac_update mbedtls_md2_hmac_update
 #define md2_info mbedtls_md2_info
 #define md2_init mbedtls_md2_init
 #define md2_process mbedtls_md2_process
@@ -2047,14 +1990,8 @@
 #define md2_update mbedtls_md2_update
 #define md4 mbedtls_md4
 #define md4_context mbedtls_md4_context
-#define md4_file mbedtls_md4_file
 #define md4_finish mbedtls_md4_finish
 #define md4_free mbedtls_md4_free
-#define md4_hmac mbedtls_md4_hmac
-#define md4_hmac_finish mbedtls_md4_hmac_finish
-#define md4_hmac_reset mbedtls_md4_hmac_reset
-#define md4_hmac_starts mbedtls_md4_hmac_starts
-#define md4_hmac_update mbedtls_md4_hmac_update
 #define md4_info mbedtls_md4_info
 #define md4_init mbedtls_md4_init
 #define md4_process mbedtls_md4_process
@@ -2063,14 +2000,8 @@
 #define md4_update mbedtls_md4_update
 #define md5 mbedtls_md5
 #define md5_context mbedtls_md5_context
-#define md5_file mbedtls_md5_file
 #define md5_finish mbedtls_md5_finish
 #define md5_free mbedtls_md5_free
-#define md5_hmac mbedtls_md5_hmac
-#define md5_hmac_finish mbedtls_md5_hmac_finish
-#define md5_hmac_reset mbedtls_md5_hmac_reset
-#define md5_hmac_starts mbedtls_md5_hmac_starts
-#define md5_hmac_update mbedtls_md5_hmac_update
 #define md5_info mbedtls_md5_info
 #define md5_init mbedtls_md5_init
 #define md5_process mbedtls_md5_process
@@ -2081,7 +2012,6 @@
 #define md_file mbedtls_md_file
 #define md_finish mbedtls_md_finish
 #define md_free mbedtls_md_free
-#define md_free_ctx mbedtls_md_free_ctx
 #define md_get_name mbedtls_md_get_name
 #define md_get_size mbedtls_md_get_size
 #define md_get_type mbedtls_md_get_type
@@ -2109,7 +2039,6 @@
 #define memory_buffer_alloc_status mbedtls_memory_buffer_alloc_status
 #define memory_buffer_alloc_verify mbedtls_memory_buffer_alloc_verify
 #define memory_buffer_set_verify mbedtls_memory_buffer_set_verify
-#define memory_set_own mbedtls_memory_set_own
 #define mpi mbedtls_mpi
 #define mpi_add_abs mbedtls_mpi_add_abs
 #define mpi_add_int mbedtls_mpi_add_int
@@ -2185,8 +2114,6 @@
 #define padlock_supports mbedtls_padlock_has_support
 #define padlock_xcryptcbc mbedtls_padlock_xcryptcbc
 #define padlock_xcryptecb mbedtls_padlock_xcryptecb
-#define pbkdf2_hmac mbedtls_pbkdf2_hmac
-#define pbkdf2_self_test mbedtls_pbkdf2_self_test
 #define pem_context mbedtls_pem_context
 #define pem_free mbedtls_pem_free
 #define pem_init mbedtls_pem_init
@@ -2246,13 +2173,11 @@
 #define platform_entropy_poll mbedtls_platform_entropy_poll
 #define platform_set_exit mbedtls_platform_set_exit
 #define platform_set_fprintf mbedtls_platform_set_fprintf
-#define platform_set_malloc_free mbedtls_platform_set_malloc_free
 #define platform_set_printf mbedtls_platform_set_printf
 #define platform_set_snprintf mbedtls_platform_set_snprintf
 #define polarssl_exit mbedtls_exit
 #define polarssl_fprintf mbedtls_fprintf
 #define polarssl_free mbedtls_free
-#define polarssl_malloc mbedtls_malloc
 #define polarssl_mutex_free mbedtls_mutex_free
 #define polarssl_mutex_init mbedtls_mutex_init
 #define polarssl_mutex_lock mbedtls_mutex_lock
@@ -2262,14 +2187,8 @@
 #define polarssl_strerror mbedtls_strerror
 #define ripemd160 mbedtls_ripemd160
 #define ripemd160_context mbedtls_ripemd160_context
-#define ripemd160_file mbedtls_ripemd160_file
 #define ripemd160_finish mbedtls_ripemd160_finish
 #define ripemd160_free mbedtls_ripemd160_free
-#define ripemd160_hmac mbedtls_ripemd160_hmac
-#define ripemd160_hmac_finish mbedtls_ripemd160_hmac_finish
-#define ripemd160_hmac_reset mbedtls_ripemd160_hmac_reset
-#define ripemd160_hmac_starts mbedtls_ripemd160_hmac_starts
-#define ripemd160_hmac_update mbedtls_ripemd160_hmac_update
 #define ripemd160_info mbedtls_ripemd160_info
 #define ripemd160_init mbedtls_ripemd160_init
 #define ripemd160_process mbedtls_ripemd160_process
@@ -2283,12 +2202,10 @@
 #define rsa_check_pubkey mbedtls_rsa_check_pubkey
 #define rsa_context mbedtls_rsa_context
 #define rsa_copy mbedtls_rsa_copy
-#define rsa_decrypt_func mbedtls_rsa_decrypt_func
 #define rsa_free mbedtls_rsa_free
 #define rsa_gen_key mbedtls_rsa_gen_key
 #define rsa_info mbedtls_rsa_info
 #define rsa_init mbedtls_rsa_init
-#define rsa_key_len_func mbedtls_rsa_key_len_func
 #define rsa_pkcs1_decrypt mbedtls_rsa_pkcs1_decrypt
 #define rsa_pkcs1_encrypt mbedtls_rsa_pkcs1_encrypt
 #define rsa_pkcs1_sign mbedtls_rsa_pkcs1_sign
@@ -2306,19 +2223,12 @@
 #define rsa_rsassa_pss_verify_ext mbedtls_rsa_rsassa_pss_verify_ext
 #define rsa_self_test mbedtls_rsa_self_test
 #define rsa_set_padding mbedtls_rsa_set_padding
-#define rsa_sign_func mbedtls_rsa_sign_func
 #define safer_memcmp mbedtls_ssl_safer_memcmp
 #define set_alarm mbedtls_set_alarm
 #define sha1 mbedtls_sha1
 #define sha1_context mbedtls_sha1_context
-#define sha1_file mbedtls_sha1_file
 #define sha1_finish mbedtls_sha1_finish
 #define sha1_free mbedtls_sha1_free
-#define sha1_hmac mbedtls_sha1_hmac
-#define sha1_hmac_finish mbedtls_sha1_hmac_finish
-#define sha1_hmac_reset mbedtls_sha1_hmac_reset
-#define sha1_hmac_starts mbedtls_sha1_hmac_starts
-#define sha1_hmac_update mbedtls_sha1_hmac_update
 #define sha1_info mbedtls_sha1_info
 #define sha1_init mbedtls_sha1_init
 #define sha1_process mbedtls_sha1_process
@@ -2328,14 +2238,8 @@
 #define sha224_info mbedtls_sha224_info
 #define sha256 mbedtls_sha256
 #define sha256_context mbedtls_sha256_context
-#define sha256_file mbedtls_sha256_file
 #define sha256_finish mbedtls_sha256_finish
 #define sha256_free mbedtls_sha256_free
-#define sha256_hmac mbedtls_sha256_hmac
-#define sha256_hmac_finish mbedtls_sha256_hmac_finish
-#define sha256_hmac_reset mbedtls_sha256_hmac_reset
-#define sha256_hmac_starts mbedtls_sha256_hmac_starts
-#define sha256_hmac_update mbedtls_sha256_hmac_update
 #define sha256_info mbedtls_sha256_info
 #define sha256_init mbedtls_sha256_init
 #define sha256_process mbedtls_sha256_process
@@ -2345,14 +2249,8 @@
 #define sha384_info mbedtls_sha384_info
 #define sha512 mbedtls_sha512
 #define sha512_context mbedtls_sha512_context
-#define sha512_file mbedtls_sha512_file
 #define sha512_finish mbedtls_sha512_finish
 #define sha512_free mbedtls_sha512_free
-#define sha512_hmac mbedtls_sha512_hmac
-#define sha512_hmac_finish mbedtls_sha512_hmac_finish
-#define sha512_hmac_reset mbedtls_sha512_hmac_reset
-#define sha512_hmac_starts mbedtls_sha512_hmac_starts
-#define sha512_hmac_update mbedtls_sha512_hmac_update
 #define sha512_info mbedtls_sha512_info
 #define sha512_init mbedtls_sha512_init
 #define sha512_process mbedtls_sha512_process
@@ -2385,7 +2283,6 @@
 #define ssl_cookie_setup mbedtls_ssl_cookie_setup
 #define ssl_cookie_write mbedtls_ssl_cookie_write
 #define ssl_cookie_write_t mbedtls_ssl_cookie_write_t
-#define ssl_curve_is_acceptable mbedtls_ssl_curve_is_acceptable
 #define ssl_derive_keys mbedtls_ssl_derive_keys
 #define ssl_dtls_replay_check mbedtls_ssl_dtls_replay_check
 #define ssl_dtls_replay_update mbedtls_ssl_dtls_replay_update
@@ -2475,8 +2372,6 @@
 #define ssl_set_max_version mbedtls_ssl_conf_max_version
 #define ssl_set_min_version mbedtls_ssl_conf_min_version
 #define ssl_set_own_cert mbedtls_ssl_conf_own_cert
-#define ssl_set_own_cert_alt mbedtls_ssl_set_own_cert_alt
-#define ssl_set_own_cert_rsa mbedtls_ssl_set_own_cert_rsa
 #define ssl_set_psk mbedtls_ssl_conf_psk
 #define ssl_set_psk_cb mbedtls_ssl_conf_psk_cb
 #define ssl_set_renegotiation mbedtls_ssl_conf_renegotiation
@@ -2485,7 +2380,6 @@
 #define ssl_set_rng mbedtls_ssl_conf_rng
 #define ssl_set_session mbedtls_ssl_set_session
 #define ssl_set_session_cache mbedtls_ssl_conf_session_cache
-#define ssl_set_session_ticket_lifetime mbedtls_ssl_conf_session_ticket_lifetime
 #define ssl_set_session_tickets mbedtls_ssl_conf_session_tickets
 #define ssl_set_sni mbedtls_ssl_conf_sni
 #define ssl_set_transport mbedtls_ssl_conf_transport
@@ -2493,7 +2387,6 @@
 #define ssl_set_verify mbedtls_ssl_conf_verify
 #define ssl_sig_from_pk mbedtls_ssl_sig_from_pk
 #define ssl_states mbedtls_ssl_states
-#define ssl_ticket_keys mbedtls_ssl_ticket_keys
 #define ssl_transform mbedtls_ssl_transform
 #define ssl_transform_free mbedtls_ssl_transform_free
 #define ssl_write mbedtls_ssl_write
@@ -2522,7 +2415,6 @@
 #define test_cli_key mbedtls_test_cli_key
 #define test_cli_key_ec mbedtls_test_cli_key_ec
 #define test_cli_key_rsa mbedtls_test_cli_key_rsa
-#define test_dhm_params mbedtls_test_dhm_params
 #define test_srv_crt mbedtls_test_srv_crt
 #define test_srv_crt_ec mbedtls_test_srv_crt_ec
 #define test_srv_crt_rsa mbedtls_test_srv_crt_rsa
@@ -2577,8 +2469,6 @@
 #define x509_get_time mbedtls_x509_get_time
 #define x509_key_size_helper mbedtls_x509_key_size_helper
 #define x509_name mbedtls_x509_name
-#define x509_oid_get_description mbedtls_x509_oid_get_description
-#define x509_oid_get_numeric_string mbedtls_x509_oid_get_numeric_string
 #define x509_self_test mbedtls_x509_self_test
 #define x509_sequence mbedtls_x509_sequence
 #define x509_serial_gets mbedtls_x509_serial_gets
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 0f7e29b..c4b8995 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -218,16 +218,16 @@
  * \def MBEDTLS_AES_ALT
  *
  * MBEDTLS__MODULE_NAME__ALT: Uncomment a macro to let mbed TLS use your
- * alternate core implementation of a symmetric crypto or hash module (e.g.
- * platform specific assembly optimized implementations). Keep in mind that
- * the function prototypes should remain the same.
+ * alternate core implementation of a symmetric crypto, an arithmetic or hash
+ * module (e.g. platform specific assembly optimized implementations). Keep
+ * in mind that the function prototypes should remain the same.
  *
  * This replaces the whole module. If you only want to replace one of the
  * functions, use one of the MBEDTLS__FUNCTION_NAME__ALT flags.
  *
  * Example: In case you uncomment MBEDTLS_AES_ALT, mbed TLS will no longer
- * provide the "struct mbedtls_aes_context" definition and omit the base function
- * declarations and implementations. "aes_alt.h" will be included from
+ * provide the "struct mbedtls_aes_context" definition and omit the base
+ * function declarations and implementations. "aes_alt.h" will be included from
  * "aes.h" to include the new function definitions.
  *
  * Uncomment a macro to enable alternate implementation of the corresponding
@@ -246,6 +246,16 @@
 //#define MBEDTLS_SHA1_ALT
 //#define MBEDTLS_SHA256_ALT
 //#define MBEDTLS_SHA512_ALT
+/*
+ * When replacing the elliptic curve module, pleace consider, that it is
+ * implemented with two .c files:
+ *      - ecp.c
+ *      - ecp_curves.c
+ * You can replace them very much like all the other MBEDTLS__MODULE_NAME__ALT
+ * macros as described above. The only difference is that you have to make sure
+ * that you provide functionality for both .c files.
+ */
+//#define MBEDTLS_ECP_ALT
 
 /**
  * \def MBEDTLS_MD2_PROCESS_ALT
@@ -286,6 +296,59 @@
 //#define MBEDTLS_AES_DECRYPT_ALT
 
 /**
+ * \def MBEDTLS_ECP_INTERNAL_ALT
+ *
+ * Expose a part of the internal interface of the Elliptic Curve Point module.
+ *
+ * MBEDTLS_ECP__FUNCTION_NAME__ALT: Uncomment a macro to let mbed TLS use your
+ * alternative core implementation of elliptic curve arithmetic. Keep in mind
+ * that function prototypes should remain the same.
+ *
+ * This partially replaces one function. The header file from mbed TLS is still
+ * used, in contrast to the MBEDTLS_ECP_ALT flag. The original implementation
+ * is still present and it is used for group structures not supported by the
+ * alternative.
+ *
+ * Any of these options become available by defining MBEDTLS_ECP_INTERNAL_ALT
+ * and implementing the following functions:
+ *      unsigned char mbedtls_internal_ecp_grp_capable(
+ *          const mbedtls_ecp_group *grp )
+ *      int  mbedtls_internal_ecp_init( const mbedtls_ecp_group *grp )
+ *      void mbedtls_internal_ecp_deinit( const mbedtls_ecp_group *grp )
+ * The mbedtls_internal_ecp_grp_capable function should return 1 if the
+ * replacement functions implement arithmetic for the given group and 0
+ * otherwise.
+ * The functions mbedtls_internal_ecp_init and mbedtls_internal_ecp_deinit are
+ * called before and after each point operation and provide an opportunity to
+ * implement optimized set up and tear down instructions.
+ *
+ * Example: In case you uncomment MBEDTLS_ECP_INTERNAL_ALT and
+ * MBEDTLS_ECP_DOUBLE_JAC_ALT, mbed TLS will still provide the ecp_double_jac
+ * function, but will use your mbedtls_internal_ecp_double_jac if the group is
+ * supported (your mbedtls_internal_ecp_grp_capable function returns 1 when
+ * receives it as an argument). If the group is not supported then the original
+ * implementation is used. The other functions and the definition of
+ * mbedtls_ecp_group and mbedtls_ecp_point will not change, so your
+ * implementation of mbedtls_internal_ecp_double_jac and
+ * mbedtls_internal_ecp_grp_capable must be compatible with this definition.
+ *
+ * Uncomment a macro to enable alternate implementation of the corresponding
+ * function.
+ */
+/* Required for all the functions in this section */
+//#define MBEDTLS_ECP_INTERNAL_ALT
+/* Support for Weierstrass curves with Jacobi representation */
+//#define MBEDTLS_ECP_RANDOMIZE_JAC_ALT
+//#define MBEDTLS_ECP_ADD_MIXED_ALT
+//#define MBEDTLS_ECP_DOUBLE_JAC_ALT
+//#define MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT
+//#define MBEDTLS_ECP_NORMALIZE_JAC_ALT
+/* Support for curves with Montgomery arithmetic */
+//#define MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT
+//#define MBEDTLS_ECP_RANDOMIZE_MXZ_ALT
+//#define MBEDTLS_ECP_NORMALIZE_MXZ_ALT
+
+/**
  * \def MBEDTLS_TEST_NULL_ENTROPY
  *
  * Enables testing and use of mbed TLS without any configured entropy sources.
@@ -2188,7 +2251,8 @@
  *          library/ssl_tls.c
  *          library/x509write_crt.c
  *
- * This module is required for SSL/TLS and SHA1-signed certificates.
+ * This module is required for SSL/TLS up to version 1.1, for TLS 1.2
+ * depending on the handshake parameters, and for SHA1-signed certificates.
  */
 #define MBEDTLS_SHA1_C
 
@@ -2573,6 +2637,26 @@
 //#define MBEDTLS_X509_MAX_INTERMEDIATE_CA   8   /**< Maximum number of intermediate CAs in a verification chain. */
 //#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 certificate signing.
+ * Without this build-time option, SHA-1 support must be activated explicitly
+ * through mbedtls_ssl_conf_cert_profile. Turning on this option is not
+ * recommended because of it is possible to generte SHA-1 collisions, however
+ * this may be safe for legacy infrastructure where additional controls apply.
+ */
+// #define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+
+/**
+ * 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
+ * for compatibility with existing peers.
+ */
+#define MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE
+
 /* \} name SECTION: Customisation configuration options */
 
 /* Target and application specific configurations */
diff --git a/include/mbedtls/ecdsa.h b/include/mbedtls/ecdsa.h
index 52827d8..a277715 100644
--- a/include/mbedtls/ecdsa.h
+++ b/include/mbedtls/ecdsa.h
@@ -69,6 +69,10 @@
  * \param f_rng     RNG function
  * \param p_rng     RNG parameter
  *
+ * \note            If the bitlength of the message hash is larger than the
+ *                  bitlength of the group order, then the hash is truncated as
+ *                  prescribed by SEC1 4.1.3 step 5.
+ *
  * \return          0 if successful,
  *                  or a MBEDTLS_ERR_ECP_XXX or MBEDTLS_MPI_XXX error code
  */
@@ -89,6 +93,10 @@
  * \param blen      Length of buf
  * \param md_alg    MD algorithm used to hash the message
  *
+ * \note            If the bitlength of the message hash is larger than the
+ *                  bitlength of the group order, then the hash is truncated as
+ *                  prescribed by SEC1 4.1.3 step 5.
+ *
  * \return          0 if successful,
  *                  or a MBEDTLS_ERR_ECP_XXX or MBEDTLS_MPI_XXX error code
  */
@@ -107,6 +115,10 @@
  * \param r         First integer of the signature
  * \param s         Second integer of the signature
  *
+ * \note            If the bitlength of the message hash is larger than the
+ *                  bitlength of the group order, then the hash is truncated as
+ *                  prescribed by SEC1 4.1.4 step 3.
+ *
  * \return          0 if successful,
  *                  MBEDTLS_ERR_ECP_BAD_INPUT_DATA if signature is invalid
  *                  or a MBEDTLS_ERR_ECP_XXX or MBEDTLS_MPI_XXX error code
@@ -120,7 +132,7 @@
  *                  serialized as defined in RFC 4492 page 20.
  *                  (Not thread-safe to use same context in multiple threads)
  *
- * \note            The deterministice version (RFC 6979) is used if
+ * \note            The deterministic version (RFC 6979) is used if
  *                  MBEDTLS_ECDSA_DETERMINISTIC is defined.
  *
  * \param ctx       ECDSA context
@@ -136,6 +148,10 @@
  *                  size of the curve used, plus 9 (eg. 73 bytes if a 256-bit
  *                  curve is used). MBEDTLS_ECDSA_MAX_LEN is always safe.
  *
+ * \note            If the bitlength of the message hash is larger than the
+ *                  bitlength of the group order, then the hash is truncated as
+ *                  prescribed by SEC1 4.1.3 step 5.
+ *
  * \return          0 if successful,
  *                  or a MBEDTLS_ERR_ECP_XXX, MBEDTLS_ERR_MPI_XXX or
  *                  MBEDTLS_ERR_ASN1_XXX error code
@@ -172,6 +188,10 @@
  *                  size of the curve used, plus 9 (eg. 73 bytes if a 256-bit
  *                  curve is used). MBEDTLS_ECDSA_MAX_LEN is always safe.
  *
+ * \note            If the bitlength of the message hash is larger than the
+ *                  bitlength of the group order, then the hash is truncated as
+ *                  prescribed by SEC1 4.1.3 step 5.
+ *
  * \return          0 if successful,
  *                  or a MBEDTLS_ERR_ECP_XXX, MBEDTLS_ERR_MPI_XXX or
  *                  MBEDTLS_ERR_ASN1_XXX error code
@@ -193,6 +213,10 @@
  * \param sig       Signature to read and verify
  * \param slen      Size of sig
  *
+ * \note            If the bitlength of the message hash is larger than the
+ *                  bitlength of the group order, then the hash is truncated as
+ *                  prescribed by SEC1 4.1.4 step 3.
+ *
  * \return          0 if successful,
  *                  MBEDTLS_ERR_ECP_BAD_INPUT_DATA if signature is invalid,
  *                  MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH if the signature is
diff --git a/include/mbedtls/ecjpake.h b/include/mbedtls/ecjpake.h
index b7b6160..161a5b2 100644
--- a/include/mbedtls/ecjpake.h
+++ b/include/mbedtls/ecjpake.h
@@ -116,7 +116,7 @@
                            const unsigned char *secret,
                            size_t len );
 
-/*
+/**
  * \brief           Check if a context is ready for use
  *
  * \param ctx       Context to check
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index 5246c78..bf9abef 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -37,6 +37,15 @@
 #define MBEDTLS_ERR_ECP_INVALID_KEY                       -0x4C80  /**< Invalid private or public key. */
 #define MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH                  -0x4C00  /**< Signature is valid but shorter than the user-supplied length. */
 
+#if !defined(MBEDTLS_ECP_ALT)
+/*
+ * default mbed TLS elliptic curve arithmetic implementation
+ *
+ * (in case MBEDTLS_ECP_ALT is defined then the developer has to provide an
+ * alternative implementation for the whole module and it will replace this
+ * one.)
+ */
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -654,16 +663,22 @@
 int mbedtls_ecp_check_pub_priv( const mbedtls_ecp_keypair *pub, const mbedtls_ecp_keypair *prv );
 
 #if defined(MBEDTLS_SELF_TEST)
+
 /**
  * \brief          Checkup routine
  *
  * \return         0 if successful, or 1 if a test failed
  */
 int mbedtls_ecp_self_test( int verbose );
-#endif
+
+#endif /* MBEDTLS_SELF_TEST */
 
 #ifdef __cplusplus
 }
 #endif
 
+#else  /* MBEDTLS_ECP_ALT */
+#include "ecp_alt.h"
+#endif /* MBEDTLS_ECP_ALT */
+
 #endif /* ecp.h */
diff --git a/include/mbedtls/ecp_internal.h b/include/mbedtls/ecp_internal.h
new file mode 100644
index 0000000..2991e26
--- /dev/null
+++ b/include/mbedtls/ecp_internal.h
@@ -0,0 +1,292 @@
+/**
+ * \file ecp_internal.h
+ *
+ * \brief Function declarations for alternative implementation of elliptic curve
+ * point arithmetic.
+ *
+ *  Copyright (C) 2016, ARM Limited, All Rights Reserved
+ *  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.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+/*
+ * References:
+ *
+ * [1] BERNSTEIN, Daniel J. Curve25519: new Diffie-Hellman speed records.
+ *     <http://cr.yp.to/ecdh/curve25519-20060209.pdf>
+ *
+ * [2] CORON, Jean-S'ebastien. Resistance against differential power analysis
+ *     for elliptic curve cryptosystems. In : Cryptographic Hardware and
+ *     Embedded Systems. Springer Berlin Heidelberg, 1999. p. 292-302.
+ *     <http://link.springer.com/chapter/10.1007/3-540-48059-5_25>
+ *
+ * [3] HEDABOU, Mustapha, PINEL, Pierre, et B'EN'ETEAU, Lucien. A comb method to
+ *     render ECC resistant against Side Channel Attacks. IACR Cryptology
+ *     ePrint Archive, 2004, vol. 2004, p. 342.
+ *     <http://eprint.iacr.org/2004/342.pdf>
+ *
+ * [4] Certicom Research. SEC 2: Recommended Elliptic Curve Domain Parameters.
+ *     <http://www.secg.org/sec2-v2.pdf>
+ *
+ * [5] HANKERSON, Darrel, MENEZES, Alfred J., VANSTONE, Scott. Guide to Elliptic
+ *     Curve Cryptography.
+ *
+ * [6] Digital Signature Standard (DSS), FIPS 186-4.
+ *     <http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf>
+ *
+ * [7] Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer 
+ *     Security (TLS), RFC 4492.
+ *     <https://tools.ietf.org/search/rfc4492>
+ *
+ * [8] <http://www.hyperelliptic.org/EFD/g1p/auto-shortw-jacobian.html>
+ *
+ * [9] COHEN, Henri. A Course in Computational Algebraic Number Theory.
+ *     Springer Science & Business Media, 1 Aug 2000
+ */
+
+#ifndef MBEDTLS_ECP_INTERNAL_H
+#define MBEDTLS_ECP_INTERNAL_H
+
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+
+/**
+ * \brief           Indicate if the Elliptic Curve Point module extension can
+ *                  handle the group.
+ *
+ * \param grp       The pointer to the elliptic curve group that will be the
+ *                  basis of the cryptographic computations.
+ *
+ * \return          Non-zero if successful.
+ */
+unsigned char mbedtls_internal_ecp_grp_capable( const mbedtls_ecp_group *grp );
+
+/**
+ * \brief           Initialise the Elliptic Curve Point module extension.
+ *
+ *                  If mbedtls_internal_ecp_grp_capable returns true for a
+ *                  group, this function has to be able to initialise the
+ *                  module for it.
+ *
+ *                  This module can be a driver to a crypto hardware
+ *                  accelerator, for which this could be an initialise function.
+ *
+ * \param grp       The pointer to the group the module needs to be
+ *                  initialised for.
+ *
+ * \return          0 if successful.
+ */
+int mbedtls_internal_ecp_init( const mbedtls_ecp_group *grp );
+
+/**
+ * \brief           Frees and deallocates the Elliptic Curve Point module
+ *                  extension.
+ *
+ * \param grp       The pointer to the group the module was initialised for.
+ */
+void mbedtls_internal_ecp_free( const mbedtls_ecp_group *grp );
+
+#if defined(ECP_SHORTWEIERSTRASS)
+
+#if defined(MBEDTLS_ECP_RANDOMIZE_JAC_ALT)
+/**
+ * \brief           Randomize jacobian coordinates:
+ *                  (X, Y, Z) -> (l^2 X, l^3 Y, l Z) for random l.
+ *
+ * \param grp       Pointer to the group representing the curve.
+ *
+ * \param pt        The point on the curve to be randomised, given with Jacobian
+ *                  coordinates.
+ *
+ * \param f_rng     A function pointer to the random number generator.
+ *
+ * \param p_rng     A pointer to the random number generator state.
+ *
+ * \return          0 if successful.
+ */
+int mbedtls_internal_ecp_randomize_jac( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *pt, int (*f_rng)(void *, unsigned char *, size_t),
+        void *p_rng );
+#endif
+
+#if defined(MBEDTLS_ECP_ADD_MIXED_ALT)
+/**
+ * \brief           Addition: R = P + Q, mixed affine-Jacobian coordinates.
+ *
+ *                  The coordinates of Q must be normalized (= affine),
+ *                  but those of P don't need to. R is not normalized.
+ *
+ *                  This function is used only as a subrutine of
+ *                  ecp_mul_comb().
+ *
+ *                  Special cases: (1) P or Q is zero, (2) R is zero,
+ *                      (3) P == Q.
+ *                  None of these cases can happen as intermediate step in
+ *                  ecp_mul_comb():
+ *                      - at each step, P, Q and R are multiples of the base
+ *                      point, the factor being less than its order, so none of
+ *                      them is zero;
+ *                      - Q is an odd multiple of the base point, P an even
+ *                      multiple, due to the choice of precomputed points in the
+ *                      modified comb method.
+ *                  So branches for these cases do not leak secret information.
+ *
+ *                  We accept Q->Z being unset (saving memory in tables) as
+ *                  meaning 1.
+ *
+ *                  Cost in field operations if done by [5] 3.22:
+ *                      1A := 8M + 3S
+ *
+ * \param grp       Pointer to the group representing the curve.
+ *
+ * \param R         Pointer to a point structure to hold the result.
+ *
+ * \param P         Pointer to the first summand, given with Jacobian
+ *                  coordinates
+ *
+ * \param Q         Pointer to the second summand, given with affine
+ *                  coordinates.
+ *
+ * \return          0 if successful.
+ */
+int mbedtls_internal_ecp_add_mixed( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *R, const mbedtls_ecp_point *P,
+        const mbedtls_ecp_point *Q );
+#endif
+
+/**
+ * \brief           Point doubling R = 2 P, Jacobian coordinates.
+ *
+ *                  Cost:   1D := 3M + 4S    (A ==  0)
+ *                          4M + 4S          (A == -3)
+ *                          3M + 6S + 1a     otherwise
+ *                  when the implementation is based on the "dbl-1998-cmo-2"
+ *                  doubling formulas in [8] and standard optimizations are
+ *                  applied when curve parameter A is one of { 0, -3 }.
+ *
+ * \param grp       Pointer to the group representing the curve.
+ *
+ * \param R         Pointer to a point structure to hold the result.
+ *
+ * \param P         Pointer to the point that has to be doubled, given with
+ *                  Jacobian coordinates.
+ *
+ * \return          0 if successful.
+ */
+#if defined(MBEDTLS_ECP_DOUBLE_JAC_ALT)
+int mbedtls_internal_ecp_double_jac( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *R, const mbedtls_ecp_point *P );
+#endif
+
+/**
+ * \brief           Normalize jacobian coordinates of an array of (pointers to)
+ *                  points.
+ *
+ *                  Using Montgomery's trick to perform only one inversion mod P
+ *                  the cost is:
+ *                      1N(t) := 1I + (6t - 3)M + 1S
+ *                  (See for example Algorithm 10.3.4. in [9])
+ *
+ *                  This function is used only as a subrutine of
+ *                  ecp_mul_comb().
+ *
+ *                  Warning: fails (returning an error) if one of the points is
+ *                  zero!
+ *                  This should never happen, see choice of w in ecp_mul_comb().
+ *
+ * \param grp       Pointer to the group representing the curve.
+ *
+ * \param T         Array of pointers to the points to normalise.
+ *
+ * \param t_len     Number of elements in the array.
+ *
+ * \return          0 if successful,
+ *                      an error if one of the points is zero.
+ */
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT)
+int mbedtls_internal_ecp_normalize_jac_many( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *T[], size_t t_len );
+#endif
+
+/**
+ * \brief           Normalize jacobian coordinates so that Z == 0 || Z == 1.
+ *
+ *                  Cost in field operations if done by [5] 3.2.1:
+ *                      1N := 1I + 3M + 1S
+ *
+ * \param grp       Pointer to the group representing the curve.
+ *
+ * \param pt        pointer to the point to be normalised. This is an
+ *                  input/output parameter.
+ *
+ * \return          0 if successful.
+ */
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_ALT)
+int mbedtls_internal_ecp_normalize_jac( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *pt );
+#endif
+
+#endif /* ECP_SHORTWEIERSTRASS */
+
+#if defined(ECP_MONTGOMERY)
+
+#if defined(MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT)
+int mbedtls_internal_ecp_double_add_mxz( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *R, mbedtls_ecp_point *S, const mbedtls_ecp_point *P,
+        const mbedtls_ecp_point *Q, const mbedtls_mpi *d );
+#endif
+
+/**
+ * \brief           Randomize projective x/z coordinates:
+ *                      (X, Z) -> (l X, l Z) for random l
+ *
+ * \param grp       pointer to the group representing the curve
+ *
+ * \param P         the point on the curve to be randomised given with
+ *                  projective coordinates. This is an input/output parameter.
+ *
+ * \param f_rng     a function pointer to the random number generator
+ *
+ * \param p_rng     a pointer to the random number generator state
+ *
+ * \return          0 if successful
+ */
+#if defined(MBEDTLS_ECP_RANDOMIZE_MXZ_ALT)
+int mbedtls_internal_ecp_randomize_mxz( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *P, int (*f_rng)(void *, unsigned char *, size_t),
+        void *p_rng );
+#endif
+
+/**
+ * \brief           Normalize Montgomery x/z coordinates: X = X/Z, Z = 1.
+ *
+ * \param grp       pointer to the group representing the curve
+ *
+ * \param P         pointer to the point to be normalised. This is an
+ *                  input/output parameter.
+ *
+ * \return          0 if successful
+ */
+#if defined(MBEDTLS_ECP_NORMALIZE_MXZ_ALT)
+int mbedtls_internal_ecp_normalize_mxz( const mbedtls_ecp_group *grp,
+        mbedtls_ecp_point *P );
+#endif
+
+#endif /* ECP_MONTGOMERY */
+
+#endif /* MBEDTLS_ECP_INTERNAL_ALT */
+
+#endif /* ecp_internal.h */
+
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 495e02c..49b1aca 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -185,6 +185,9 @@
 #define MBEDTLS_SSL_PRESET_DEFAULT              0
 #define MBEDTLS_SSL_PRESET_SUITEB               2
 
+#define MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED       1
+#define MBEDTLS_SSL_CERT_REQ_CA_LIST_DISABLED      0
+
 /*
  * Default range for DTLS retransmission timer value, in milliseconds.
  * RFC 6347 4.2.4.1 says from 1 second to 60 seconds.
@@ -531,6 +534,7 @@
 /* Defined in ssl_internal.h */
 typedef struct mbedtls_ssl_transform mbedtls_ssl_transform;
 typedef struct mbedtls_ssl_handshake_params mbedtls_ssl_handshake_params;
+typedef struct mbedtls_ssl_sig_hash_set_t mbedtls_ssl_sig_hash_set_t;
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 typedef struct mbedtls_ssl_key_cert mbedtls_ssl_key_cert;
 #endif
@@ -749,6 +753,10 @@
 #if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
     unsigned int fallback : 1;      /*!< is this a fallback?                */
 #endif
+#if defined(MBEDTLS_SSL_SRV_C)
+    unsigned int cert_req_ca_list : 1;  /*!< enable sending CA list in
+                                          Certificate Request messages?     */
+#endif
 };
 
 
@@ -2031,6 +2039,20 @@
 void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 );
 #endif /* MBEDTLS_ARC4_C */
 
+#if defined(MBEDTLS_SSL_SRV_C)
+/**
+ * \brief          Whether to send a list of acceptable CAs in
+ *                 CertificateRequest messages.
+ *                 (Default: do send)
+ *
+ * \param conf     SSL configuration
+ * \param cert_req_ca_list   MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED or
+ *                          MBEDTLS_SSL_CERT_REQ_CA_LIST_DISABLED
+ */
+void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
+                                          char cert_req_ca_list );
+#endif /* MBEDTLS_SSL_SRV_C */
+
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
 /**
  * \brief          Set the maximum fragment length to emit and/or negotiate
diff --git a/include/mbedtls/ssl_ciphersuites.h b/include/mbedtls/ssl_ciphersuites.h
index deaaa37..931c1b3 100644
--- a/include/mbedtls/ssl_ciphersuites.h
+++ b/include/mbedtls/ssl_ciphersuites.h
@@ -260,6 +260,47 @@
 #define MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED
 #endif
 
+/* Key exchanges allowing client certificate requests */
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)           ||       \
+    defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       ||       \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)      ||       \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     ||       \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)    ||       \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) 
+#define MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED
+#endif
+
+/* Key exchanges involving server signature in ServerKeyExchange */
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
+#define MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED
+#endif
+
+/* Key exchanges using ECDH */
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)      || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+#define MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED
+#endif
+
+/* Key exchanges that don't involve ephemeral keys */
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)           || \
+    defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)           || \
+    defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)       || \
+    defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED)
+#define MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED
+#endif
+
+/* Key exchanges that involve ephemeral keys */
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
+    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)       || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)     || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)   || \
+    defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+#define MBEDTLS_KEY_EXCHANGE__SOME_PFS__ENABLED
+#endif
+
 /* Key exchanges using a PSK */
 #if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)           || \
     defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)       || \
@@ -268,7 +309,13 @@
 #define MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED
 #endif
 
-/* Key exchanges using a ECDHE */
+/* Key exchanges using DHE */
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
+    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
+#define MBEDTLS_KEY_EXCHANGE__SOME__DHE_ENABLED
+#endif
+
+/* Key exchanges using ECDHE */
 #if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \
     defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)   || \
     defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
@@ -309,10 +356,159 @@
 
 #if defined(MBEDTLS_PK_C)
 mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_pk_alg( const mbedtls_ssl_ciphersuite_t *info );
+mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_alg( const mbedtls_ssl_ciphersuite_t *info );
 #endif
 
-int mbedtls_ssl_ciphersuite_uses_ec( const mbedtls_ssl_ciphersuite_t *info );
-int mbedtls_ssl_ciphersuite_uses_psk( const mbedtls_ssl_ciphersuite_t *info );
+#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
+static inline int mbedtls_ssl_ciphersuite_uses_ec( const mbedtls_ssl_ciphersuite_t *info )
+{
+    switch( info->key_exchange )
+    {
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
+        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */
+
+#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 )
+    {
+        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
+        case MBEDTLS_KEY_EXCHANGE_ECJPAKE:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME_PFS__ENABLED */
+
+#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 )
+    {
+        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
+        case MBEDTLS_KEY_EXCHANGE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_PSK:
+        case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
+
+#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 )
+    {
+        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+static inline int mbedtls_ssl_ciphersuite_uses_psk( const mbedtls_ssl_ciphersuite_t *info )
+{
+    switch( info->key_exchange )
+    {
+        case MBEDTLS_KEY_EXCHANGE_PSK:
+        case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
+        case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+
+static inline int mbedtls_ssl_ciphersuite_cert_req_allowed( const mbedtls_ssl_ciphersuite_t *info )
+{
+    switch( info->key_exchange )
+    {
+        case MBEDTLS_KEY_EXCHANGE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+
+#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 )
+    {
+        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__DHE_ENABLED) */
+
+#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 )
+    {
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDHE_ENABLED) */
+
+#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 )
+    {
+        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
+            return( 1 );
+
+        default:
+            return( 0 );
+    }
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
 
 #ifdef __cplusplus
 }
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 668c0f5..766b4ab 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -157,6 +157,24 @@
 extern "C" {
 #endif
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+/*
+ * Abstraction for a grid of allowed signature-hash-algorithm pairs.
+ */
+struct mbedtls_ssl_sig_hash_set_t
+{
+    /* At the moment, we only need to remember a single suitable
+     * hash algorithm per signature algorithm. As long as that's
+     * the case - and we don't need a general lookup function -
+     * we can implement the sig-hash-set as a map from signatures
+     * to hash algorithms. */
+    mbedtls_md_type_t rsa;
+    mbedtls_md_type_t ecdsa;
+};
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
+          MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
 /*
  * This structure contains the parameters only needed during handshake.
  */
@@ -165,8 +183,11 @@
     /*
      * Handshake specific crypto variables
      */
-    int sig_alg;                        /*!<  Hash algorithm for signature   */
-    int verify_sig_alg;                 /*!<  Signature algorithm for verify */
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+    mbedtls_ssl_sig_hash_set_t hash_algs;             /*!<  Set of suitable sig-hash pairs */
+#endif
 #if defined(MBEDTLS_DHM_C)
     mbedtls_dhm_context dhm_ctx;                /*!<  DHM key exchange        */
 #endif
@@ -179,7 +200,7 @@
     unsigned char *ecjpake_cache;               /*!< Cache for ClientHello ext */
     size_t ecjpake_cache_len;                   /*!< Length of cached data */
 #endif
-#endif
+#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
 #if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
     defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
     const mbedtls_ecp_curve_info **curves;      /*!<  Supported elliptic curves */
@@ -195,7 +216,7 @@
     mbedtls_ssl_key_cert *sni_key_cert; /*!< key/cert list from SNI         */
     mbedtls_x509_crt *sni_ca_chain;     /*!< trusted CAs from SNI callback  */
     mbedtls_x509_crl *sni_ca_crl;       /*!< trusted CAs CRLs from SNI      */
-#endif
+#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
     unsigned int out_msg_seq;           /*!<  Outgoing handshake sequence number */
@@ -218,7 +239,7 @@
                                               resending messages             */
     unsigned char alt_out_ctr[8];       /*!<  Alternative record epoch/counter
                                               for resending messages         */
-#endif
+#endif /* MBEDTLS_SSL_PROTO_DTLS */
 
     /*
      * Checksum contexts
@@ -329,6 +350,28 @@
 };
 #endif /* MBEDTLS_SSL_PROTO_DTLS */
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+
+/* Find an entry in a signature-hash set matching a given hash algorithm. */
+mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
+                                                 mbedtls_pk_type_t sig_alg );
+/* Add a signature-hash-pair to a signature-hash set */
+void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
+                                   mbedtls_pk_type_t sig_alg,
+                                   mbedtls_md_type_t md_alg );
+/* Allow exactly one hash algorithm for each signature. */
+void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
+                                          mbedtls_md_type_t md_alg );
+
+/* Setup an empty signature-hash set */
+static inline void mbedtls_ssl_sig_hash_set_init( mbedtls_ssl_sig_hash_set_t *set )
+{
+    mbedtls_ssl_sig_hash_set_const_hash( set, MBEDTLS_MD_NONE );
+}
+
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2) &&
+          MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
 
 /**
  * \brief           Free referenced items in an SSL transform context and clear
@@ -384,6 +427,7 @@
 
 #if defined(MBEDTLS_PK_C)
 unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk );
+unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type );
 mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig );
 #endif
 
diff --git a/include/mbedtls/threading.h b/include/mbedtls/threading.h
index b0c34ec..a89fd64 100644
--- a/include/mbedtls/threading.h
+++ b/include/mbedtls/threading.h
@@ -97,6 +97,9 @@
  */
 extern mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex;
 extern mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex;
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+extern mbedtls_threading_mutex_t mbedtls_threading_ecp_mutex;
+#endif
 #endif /* MBEDTLS_THREADING_C */
 
 #ifdef __cplusplus
diff --git a/include/mbedtls/version.h b/include/mbedtls/version.h
index 3270346..1660961 100644
--- a/include/mbedtls/version.h
+++ b/include/mbedtls/version.h
@@ -38,17 +38,17 @@
  * Major, Minor, Patchlevel
  */
 #define MBEDTLS_VERSION_MAJOR  2
-#define MBEDTLS_VERSION_MINOR  4
-#define MBEDTLS_VERSION_PATCH  1
+#define MBEDTLS_VERSION_MINOR  5
+#define MBEDTLS_VERSION_PATCH  0
 
 /**
  * The single version number has the following structure:
  *    MMNNPP00
  *    Major version | Minor version | Patch version
  */
-#define MBEDTLS_VERSION_NUMBER         0x02040100
-#define MBEDTLS_VERSION_STRING         "2.4.1"
-#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.4.1"
+#define MBEDTLS_VERSION_NUMBER         0x02050000
+#define MBEDTLS_VERSION_STRING         "2.5.0"
+#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.5.0"
 
 #if defined(MBEDTLS_VERSION_C)
 
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 8882ddf..77e9b21 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -140,15 +140,15 @@
 
 if(USE_SHARED_MBEDTLS_LIBRARY)
     add_library(mbedcrypto SHARED ${src_crypto})
-    set_target_properties(mbedcrypto PROPERTIES VERSION 2.4.1 SOVERSION 0)
+    set_target_properties(mbedcrypto PROPERTIES VERSION 2.5.0 SOVERSION 0)
     target_link_libraries(mbedcrypto ${libs})
 
     add_library(mbedx509 SHARED ${src_x509})
-    set_target_properties(mbedx509 PROPERTIES VERSION 2.4.1 SOVERSION 0)
+    set_target_properties(mbedx509 PROPERTIES VERSION 2.5.0 SOVERSION 0)
     target_link_libraries(mbedx509 ${libs} mbedcrypto)
 
     add_library(mbedtls SHARED ${src_tls})
-    set_target_properties(mbedtls PROPERTIES VERSION 2.4.1 SOVERSION 10)
+    set_target_properties(mbedtls PROPERTIES VERSION 2.5.0 SOVERSION 10)
     target_link_libraries(mbedtls ${libs} mbedx509)
 
     install(TARGETS mbedtls mbedx509 mbedcrypto
diff --git a/library/aes.c b/library/aes.c
index a186dee..5e01c4f 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -710,9 +710,9 @@
  * AES-ECB block encryption
  */
 #if !defined(MBEDTLS_AES_ENCRYPT_ALT)
-void mbedtls_aes_encrypt( mbedtls_aes_context *ctx,
-                          const unsigned char input[16],
-                          unsigned char output[16] )
+int mbedtls_internal_aes_encrypt( mbedtls_aes_context *ctx,
+                                  const unsigned char input[16],
+                                  unsigned char output[16] )
 {
     int i;
     uint32_t *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;
@@ -760,6 +760,8 @@
     PUT_UINT32_LE( X1, output,  4 );
     PUT_UINT32_LE( X2, output,  8 );
     PUT_UINT32_LE( X3, output, 12 );
+
+    return( 0 );
 }
 #endif /* !MBEDTLS_AES_ENCRYPT_ALT */
 
@@ -767,9 +769,9 @@
  * AES-ECB block decryption
  */
 #if !defined(MBEDTLS_AES_DECRYPT_ALT)
-void mbedtls_aes_decrypt( mbedtls_aes_context *ctx,
-                          const unsigned char input[16],
-                          unsigned char output[16] )
+int mbedtls_internal_aes_decrypt( mbedtls_aes_context *ctx,
+                                  const unsigned char input[16],
+                                  unsigned char output[16] )
 {
     int i;
     uint32_t *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;
@@ -817,6 +819,8 @@
     PUT_UINT32_LE( X1, output,  4 );
     PUT_UINT32_LE( X2, output,  8 );
     PUT_UINT32_LE( X3, output, 12 );
+
+    return( 0 );
 }
 #endif /* !MBEDTLS_AES_DECRYPT_ALT */
 
@@ -846,11 +850,9 @@
 #endif
 
     if( mode == MBEDTLS_AES_ENCRYPT )
-        mbedtls_aes_encrypt( ctx, input, output );
+        return( mbedtls_internal_aes_encrypt( ctx, input, output ) );
     else
-        mbedtls_aes_decrypt( ctx, input, output );
-
-    return( 0 );
+        return( mbedtls_internal_aes_decrypt( ctx, input, output ) );
 }
 
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
diff --git a/library/bignum.c b/library/bignum.c
index 8b9082c..d3a150c 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -616,11 +616,11 @@
     if( slen == sizeof( s ) - 2 )
         return( MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL );
 
-    if( s[slen - 1] == '\n' ) { slen--; s[slen] = '\0'; }
-    if( s[slen - 1] == '\r' ) { slen--; s[slen] = '\0'; }
+    if( slen > 0 && s[slen - 1] == '\n' ) { slen--; s[slen] = '\0'; }
+    if( slen > 0 && s[slen - 1] == '\r' ) { slen--; s[slen] = '\0'; }
 
     p = s + slen;
-    while( --p >= s )
+    while( p-- > s )
         if( mpi_get_digit( &d, radix, *p ) != 0 )
             break;
 
@@ -1790,7 +1790,7 @@
      */
     MBEDTLS_MPI_CHK( mpi_montred( X, N, mm, &T ) );
 
-    if( neg )
+    if( neg && E->n != 0 && ( E->p[0] & 1 ) != 0 )
     {
         X->s = -1;
         MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( X, N, X ) );
@@ -1893,7 +1893,7 @@
     int ret;
     mbedtls_mpi G, TA, TU, U1, U2, TB, TV, V1, V2;
 
-    if( mbedtls_mpi_cmp_int( N, 0 ) <= 0 )
+    if( mbedtls_mpi_cmp_int( N, 1 ) <= 0 )
         return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
 
     mbedtls_mpi_init( &TA ); mbedtls_mpi_init( &TU ); mbedtls_mpi_init( &U1 ); mbedtls_mpi_init( &U2 );
diff --git a/library/certs.c b/library/certs.c
index ffe6bc9..5c01998 100644
--- a/library/certs.c
+++ b/library/certs.c
@@ -47,6 +47,7 @@
 "uCjn8pwUOkABXK8Mss90fzCfCEOtIA==\r\n"                                  \
 "-----END CERTIFICATE-----\r\n"
 const char mbedtls_test_ca_crt_ec[] = TEST_CA_CRT_EC;
+const size_t mbedtls_test_ca_crt_ec_len = sizeof( mbedtls_test_ca_crt_ec );
 
 const char mbedtls_test_ca_key_ec[] =
 "-----BEGIN EC PRIVATE KEY-----\r\n"
@@ -58,8 +59,10 @@
 "UsuWTITwJImcnlAs1gaRZ3sAWm7cOUidL0fo2G0fYUFNcYoCSLffCFTEHBuPnagb\r\n"
 "a77x/sY1Bvii8S9/XhDTb6pTMx06wzrm\r\n"
 "-----END EC PRIVATE KEY-----\r\n";
+const size_t mbedtls_test_ca_key_ec_len = sizeof( mbedtls_test_ca_key_ec );
 
 const char mbedtls_test_ca_pwd_ec[] = "PolarSSLTest";
+const size_t mbedtls_test_ca_pwd_ec_len = sizeof( mbedtls_test_ca_pwd_ec ) - 1;
 
 const char mbedtls_test_srv_crt_ec[] =
 "-----BEGIN CERTIFICATE-----\r\n"
@@ -76,6 +79,7 @@
 "C12r0Lz3ri/moSEpNZWqPjkCMCE2f53GXcYLqyfyJR078c/xNSUU5+Xxl7VZ414V\r\n"
 "fGa5kHvHARBPc8YAIVIqDvHH1Q==\r\n"
 "-----END CERTIFICATE-----\r\n";
+const size_t mbedtls_test_srv_crt_ec_len = sizeof( mbedtls_test_srv_crt_ec );
 
 const char mbedtls_test_srv_key_ec[] =
 "-----BEGIN EC PRIVATE KEY-----\r\n"
@@ -83,6 +87,7 @@
 "AwEHoUQDQgAEN8xW2XYJHlpyPsdZLf8gbu58+QaRdNCtFLX3aCJZYpJO5QDYIxH/\r\n"
 "6i/SNF1dFr2KiMJrdw1VzYoqDvoByLTt/w==\r\n"
 "-----END EC PRIVATE KEY-----\r\n";
+const size_t mbedtls_test_srv_key_ec_len = sizeof( mbedtls_test_srv_key_ec );
 
 const char mbedtls_test_cli_crt_ec[] =
 "-----BEGIN CERTIFICATE-----\r\n"
@@ -99,6 +104,7 @@
 "lgOsjnhw3fIOoLIWy2WOGsk/LGF++DzvrRzuNiACMQCd8iem1XS4JK7haj8xocpU\r\n"
 "LwjQje5PDGHfd3h9tP38Qknu5bJqws0md2KOKHyeV0U=\r\n"
 "-----END CERTIFICATE-----\r\n";
+const size_t mbedtls_test_cli_crt_ec_len = sizeof( mbedtls_test_cli_crt_ec );
 
 const char mbedtls_test_cli_key_ec[] =
 "-----BEGIN EC PRIVATE KEY-----\r\n"
@@ -106,20 +112,12 @@
 "AwEHoUQDQgAEV+WusXPf06y7k7iB/xKu7uZTrM5VU/Y0Dswu42MlC9+Y4vNcYDaW\r\n"
 "wNUYFHDlf5/VS0UY5bBs1Vz4lo+HcKPkxw==\r\n"
 "-----END EC PRIVATE KEY-----\r\n";
-
-const size_t mbedtls_test_ca_crt_ec_len  = sizeof( mbedtls_test_ca_crt_ec );
-const size_t mbedtls_test_ca_key_ec_len  = sizeof( mbedtls_test_ca_key_ec );
-const size_t mbedtls_test_ca_pwd_ec_len  = sizeof( mbedtls_test_ca_pwd_ec ) - 1;
-const size_t mbedtls_test_srv_crt_ec_len = sizeof( mbedtls_test_srv_crt_ec );
-const size_t mbedtls_test_srv_key_ec_len = sizeof( mbedtls_test_srv_key_ec );
-const size_t mbedtls_test_cli_crt_ec_len = sizeof( mbedtls_test_cli_crt_ec );
 const size_t mbedtls_test_cli_key_ec_len = sizeof( mbedtls_test_cli_key_ec );
-#else
-#define TEST_CA_CRT_EC
 #endif /* MBEDTLS_ECDSA_C */
 
 #if defined(MBEDTLS_RSA_C)
-#define TEST_CA_CRT_RSA                                                 \
+#if defined(MBEDTLS_SHA1_C)
+#define TEST_CA_CRT_RSA_SHA1                                            \
 "-----BEGIN CERTIFICATE-----\r\n"                                       \
 "MIIDhzCCAm+gAwIBAgIBADANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER\r\n"  \
 "MA8GA1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwHhcN\r\n"  \
@@ -141,7 +139,34 @@
 "m/UTSLBNFNHesiTZeH31NcxYGdHSme9Nc/gfidRa0FLOCfWxRlFqAI47zG9jAQCZ\r\n"  \
 "7Z2mCGDNMhjQc+BYcdnl0lPXjdDK6V0qCg1dVewhUBcW5gZKzV7e9+DpVA==\r\n"      \
 "-----END CERTIFICATE-----\r\n"
-const char mbedtls_test_ca_crt_rsa[] = TEST_CA_CRT_RSA;
+static const char mbedtls_test_ca_crt_rsa_sha1[] = TEST_CA_CRT_RSA_SHA1;
+#endif
+
+#if defined(MBEDTLS_SHA256_C)
+#define TEST_CA_CRT_RSA_SHA256                                          \
+"-----BEGIN CERTIFICATE-----\r\n"                                       \
+"MIIDhzCCAm+gAwIBAgIBADANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER\r\n"  \
+"MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN\r\n"  \
+"MTcwNTA0MTY1NzAxWhcNMjcwNTA1MTY1NzAxWjA7MQswCQYDVQQGEwJOTDERMA8G\r\n"  \
+"A1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwggEiMA0G\r\n"  \
+"CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDA3zf8F7vglp0/ht6WMn1EpRagzSHx\r\n"  \
+"mdTs6st8GFgIlKXsm8WL3xoemTiZhx57wI053zhdcHgH057Zk+i5clHFzqMwUqny\r\n"  \
+"50BwFMtEonILwuVA+T7lpg6z+exKY8C4KQB0nFc7qKUEkHHxvYPZP9al4jwqj+8n\r\n"  \
+"YMPGn8u67GB9t+aEMr5P+1gmIgNb1LTV+/Xjli5wwOQuvfwu7uJBVcA0Ln0kcmnL\r\n"  \
+"R7EUQIN9Z/SG9jGr8XmksrUuEvmEF/Bibyc+E1ixVA0hmnM3oTDPb5Lc9un8rNsu\r\n"  \
+"KNF+AksjoBXyOGVkCeoMbo4bF6BxyLObyavpw/LPh5aPgAIynplYb6LVAgMBAAGj\r\n"  \
+"gZUwgZIwHQYDVR0OBBYEFLRa5KWz3tJS9rnVppUP6z68x/3/MGMGA1UdIwRcMFqA\r\n"  \
+"FLRa5KWz3tJS9rnVppUP6z68x/3/oT+kPTA7MQswCQYDVQQGEwJOTDERMA8GA1UE\r\n"  \
+"CgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0GCAQAwDAYDVR0T\r\n"  \
+"BAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAQEAHK/HHrTZMnnVMpde1io+voAtql7j\r\n"  \
+"4sRhLrjD7o3THtwRbDa2diCvpq0Sq23Ng2LMYoXsOxoL/RQK3iN7UKxV3MKPEr0w\r\n"  \
+"XQS+kKQqiT2bsfrjnWMVHZtUOMpm6FNqcdGm/Rss3vKda2lcKl8kUnq/ylc1+QbB\r\n"  \
+"G6A6tUvQcr2ZyWfVg+mM5XkhTrOOXus2OLikb4WwEtJTJRNE0f+yPODSUz0/vT57\r\n"  \
+"ApH0CnB80bYJshYHPHHymOtleAB8KSYtqm75g/YNobjnjB6cm4HkW3OZRVIl6fYY\r\n"  \
+"n20NRVA1Vjs6GAROr4NqW4k/+LofY9y0LLDE+p0oIEKXIsIvhPr39swxSA==\r\n"      \
+"-----END CERTIFICATE-----\r\n"
+static const char mbedtls_test_ca_crt_rsa_sha256[] = TEST_CA_CRT_RSA_SHA256;
+#endif
 
 const char mbedtls_test_ca_key_rsa[] =
 "-----BEGIN RSA PRIVATE KEY-----\r\n"
@@ -174,8 +199,10 @@
 "wN48lslbHnqqagr6Xm1nNOSVl8C/6kbJEsMpLhAezfRtGwvOucoaE+WbeUNolGde\r\n"
 "P/eQiddSf0brnpiLJRh7qZrl9XuqYdpUqnoEdMAfotDOID8OtV7gt8a48ad8VPW2\r\n"
 "-----END RSA PRIVATE KEY-----\r\n";
+const size_t mbedtls_test_ca_key_rsa_len = sizeof( mbedtls_test_ca_key_rsa );
 
 const char mbedtls_test_ca_pwd_rsa[] = "PolarSSLTest";
+const size_t mbedtls_test_ca_pwd_rsa_len = sizeof( mbedtls_test_ca_pwd_rsa ) - 1;
 
 const char mbedtls_test_srv_crt_rsa[] =
 "-----BEGIN CERTIFICATE-----\r\n"
@@ -198,6 +225,7 @@
 "RRQfaD8neM9c1S/iJ/amTVqJxA1KOdOS5780WhPfSArA+g4qAmSjelc3p4wWpha8\r\n"
 "zhuYwjVuX6JHG0c=\r\n"
 "-----END CERTIFICATE-----\r\n";
+const size_t mbedtls_test_srv_crt_rsa_len = sizeof( mbedtls_test_srv_crt_rsa );
 
 const char mbedtls_test_srv_key_rsa[] =
 "-----BEGIN RSA PRIVATE KEY-----\r\n"
@@ -227,27 +255,29 @@
 "4AgahOxIxXx2gxJnq3yfkJfIjwf0s2DyP0kY2y6Ua1OeomPeY9mrIS4tCuDQ6LrE\r\n"
 "TB6l9VGoxJL4fyHnZb8L5gGvnB1bbD8cL6YPaDiOhcRseC9vBiEuVg==\r\n"
 "-----END RSA PRIVATE KEY-----\r\n";
+const size_t mbedtls_test_srv_key_rsa_len = sizeof( mbedtls_test_srv_key_rsa );
 
-const char mbedtls_test_cli_crt_rsa[] =
+static const char mbedtls_test_cli_crt_rsa_sha256[] =
 "-----BEGIN CERTIFICATE-----\r\n"
-"MIIDPzCCAiegAwIBAgIBBDANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER\r\n"
-"MA8GA1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwHhcN\r\n"
-"MTEwMjEyMTQ0NDA3WhcNMjEwMjEyMTQ0NDA3WjA8MQswCQYDVQQGEwJOTDERMA8G\r\n"
-"A1UEChMIUG9sYXJTU0wxGjAYBgNVBAMTEVBvbGFyU1NMIENsaWVudCAyMIIBIjAN\r\n"
+"MIIDhTCCAm2gAwIBAgIBBDANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER\r\n"
+"MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN\r\n"
+"MTcwNTA1MTMwNzU5WhcNMjcwNTA2MTMwNzU5WjA8MQswCQYDVQQGEwJOTDERMA8G\r\n"
+"A1UECgwIUG9sYXJTU0wxGjAYBgNVBAMMEVBvbGFyU1NMIENsaWVudCAyMIIBIjAN\r\n"
 "BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyHTEzLn5tXnpRdkUYLB9u5Pyax6f\r\n"
 "M60Nj4o8VmXl3ETZzGaFB9X4J7BKNdBjngpuG7fa8H6r7gwQk4ZJGDTzqCrSV/Uu\r\n"
 "1C93KYRhTYJQj6eVSHD1bk2y1RPD0hrt5kPqQhTrdOrA7R/UV06p86jt0uDBMHEw\r\n"
 "MjDV0/YI0FZPRo7yX/k9Z5GIMC5Cst99++UMd//sMcB4j7/Cf8qtbCHWjdmLao5v\r\n"
 "4Jv4EFbMs44TFeY0BGbH7vk2DmqV9gmaBmf0ZXH4yqSxJeD+PIs1BGe64E92hfx/\r\n"
 "/DZrtenNLQNiTrM9AM+vdqBpVoNq0qjU51Bx5rU2BXcFbXvI5MT9TNUhXwIDAQAB\r\n"
-"o00wSzAJBgNVHRMEAjAAMB0GA1UdDgQWBBRxoQBzckAvVHZeM/xSj7zx3WtGITAf\r\n"
-"BgNVHSMEGDAWgBS0WuSls97SUva51aaVD+s+vMf9/zANBgkqhkiG9w0BAQUFAAOC\r\n"
-"AQEAAn86isAM8X+mVwJqeItt6E9slhEQbAofyk+diH1Lh8Y9iLlWQSKbw/UXYjx5\r\n"
-"LLPZcniovxIcARC/BjyZR9g3UwTHNGNm+rwrqa15viuNOFBchykX/Orsk02EH7NR\r\n"
-"Alw5WLPorYjED6cdVQgBl9ot93HdJogRiXCxErM7NC8/eP511mjq+uLDjLKH8ZPQ\r\n"
-"8I4ekHJnroLsDkIwXKGIsvIBHQy2ac/NwHLCQOK6mfum1pRx52V4Utu5dLLjD5bM\r\n"
-"xOBC7KU4xZKuMXXZM6/93Yb51K/J4ahf1TxJlTWXtnzDr9saEYdNy2SKY/6ZiDNH\r\n"
-"D+stpAKiQLAWaAusIWKYEyw9MQ==\r\n"
+"o4GSMIGPMB0GA1UdDgQWBBRxoQBzckAvVHZeM/xSj7zx3WtGITBjBgNVHSMEXDBa\r\n"
+"gBS0WuSls97SUva51aaVD+s+vMf9/6E/pD0wOzELMAkGA1UEBhMCTkwxETAPBgNV\r\n"
+"BAoMCFBvbGFyU1NMMRkwFwYDVQQDDBBQb2xhclNTTCBUZXN0IENBggEAMAkGA1Ud\r\n"
+"EwQCMAAwDQYJKoZIhvcNAQELBQADggEBAC7yO786NvcHpK8UovKIG9cB32oSQQom\r\n"
+"LoR0eHDRzdqEkoq7yGZufHFiRAAzbMqJfogRtxlrWAeB4y/jGaMBV25IbFOIcH2W\r\n"
+"iCEaMMbG+VQLKNvuC63kmw/Zewc9ThM6Pa1Hcy0axT0faf1B/U01j0FIcw/6mTfK\r\n"
+"D8w48OIwc1yr0JtutCVjig5DC0yznGMt32RyseOLcUe+lfq005v2PAiCozr5X8rE\r\n"
+"ofGZpiM2NqRPePgYy+Vc75Zk28xkRQq1ncprgQb3S4vTsZdScpM9hLf+eMlrgqlj\r\n"
+"c5PLSkXBeLE5+fedkyfTaLxxQlgCpuoOhKBm04/R1pWNzUHyqagjO9Q=\r\n"
 "-----END CERTIFICATE-----\r\n";
 
 const char mbedtls_test_cli_key_rsa[] =
@@ -278,28 +308,32 @@
 "bHFVW2r0dBTqegP2/KTOxKzaHfC1qf0RGDsUoJCNJrd1cwoCLG8P2EF4w3OBrKqv\r\n"
 "8u4ytY0F+Vlanj5lm3TaoHSVF1+NWPyOTiwevIECGKwSxvlki4fDAA==\r\n"
 "-----END RSA PRIVATE KEY-----\r\n";
-
-const size_t mbedtls_test_ca_crt_rsa_len  = sizeof( mbedtls_test_ca_crt_rsa );
-const size_t mbedtls_test_ca_key_rsa_len  = sizeof( mbedtls_test_ca_key_rsa );
-const size_t mbedtls_test_ca_pwd_rsa_len  = sizeof( mbedtls_test_ca_pwd_rsa ) - 1;
-const size_t mbedtls_test_srv_crt_rsa_len = sizeof( mbedtls_test_srv_crt_rsa );
-const size_t mbedtls_test_srv_key_rsa_len = sizeof( mbedtls_test_srv_key_rsa );
-const size_t mbedtls_test_cli_crt_rsa_len = sizeof( mbedtls_test_cli_crt_rsa );
 const size_t mbedtls_test_cli_key_rsa_len = sizeof( mbedtls_test_cli_key_rsa );
-#else
-#define TEST_CA_CRT_RSA
 #endif /* MBEDTLS_RSA_C */
 
 #if defined(MBEDTLS_PEM_PARSE_C)
 /* Concatenation of all available CA certificates */
-const char mbedtls_test_cas_pem[] = TEST_CA_CRT_RSA TEST_CA_CRT_EC;
+const char mbedtls_test_cas_pem[] =
+#ifdef TEST_CA_CRT_RSA_SHA1
+    TEST_CA_CRT_RSA_SHA1
+#endif
+#ifdef TEST_CA_CRT_RSA_SHA256
+    TEST_CA_CRT_RSA_SHA256
+#endif
+#ifdef TEST_CA_CRT_EC
+    TEST_CA_CRT_EC
+#endif
+    "";
 const size_t mbedtls_test_cas_pem_len = sizeof( mbedtls_test_cas_pem );
 #endif
 
 /* List of all available CA certificates */
 const char * mbedtls_test_cas[] = {
-#if defined(MBEDTLS_RSA_C)
-    mbedtls_test_ca_crt_rsa,
+#if defined(TEST_CA_CRT_RSA_SHA1)
+    mbedtls_test_ca_crt_rsa_sha1,
+#endif
+#if defined(TEST_CA_CRT_RSA_SHA256)
+    mbedtls_test_ca_crt_rsa_sha256,
 #endif
 #if defined(MBEDTLS_ECDSA_C)
     mbedtls_test_ca_crt_ec,
@@ -307,8 +341,11 @@
     NULL
 };
 const size_t mbedtls_test_cas_len[] = {
-#if defined(MBEDTLS_RSA_C)
-    sizeof( mbedtls_test_ca_crt_rsa ),
+#if defined(TEST_CA_CRT_RSA_SHA1)
+    sizeof( mbedtls_test_ca_crt_rsa_sha1 ),
+#endif
+#if defined(TEST_CA_CRT_RSA_SHA256)
+    sizeof( mbedtls_test_ca_crt_rsa_sha256 ),
 #endif
 #if defined(MBEDTLS_ECDSA_C)
     sizeof( mbedtls_test_ca_crt_ec ),
@@ -317,19 +354,19 @@
 };
 
 #if defined(MBEDTLS_RSA_C)
-const char *mbedtls_test_ca_crt  = mbedtls_test_ca_crt_rsa;
+const char *mbedtls_test_ca_crt  = mbedtls_test_ca_crt_rsa_sha256;
 const char *mbedtls_test_ca_key  = mbedtls_test_ca_key_rsa;
 const char *mbedtls_test_ca_pwd  = mbedtls_test_ca_pwd_rsa;
 const char *mbedtls_test_srv_crt = mbedtls_test_srv_crt_rsa;
 const char *mbedtls_test_srv_key = mbedtls_test_srv_key_rsa;
-const char *mbedtls_test_cli_crt = mbedtls_test_cli_crt_rsa;
+const char *mbedtls_test_cli_crt = mbedtls_test_cli_crt_rsa_sha256;
 const char *mbedtls_test_cli_key = mbedtls_test_cli_key_rsa;
-const size_t mbedtls_test_ca_crt_len  = sizeof( mbedtls_test_ca_crt_rsa );
+const size_t mbedtls_test_ca_crt_len  = sizeof( mbedtls_test_ca_crt_rsa_sha256 );
 const size_t mbedtls_test_ca_key_len  = sizeof( mbedtls_test_ca_key_rsa );
 const size_t mbedtls_test_ca_pwd_len  = sizeof( mbedtls_test_ca_pwd_rsa ) - 1;
 const size_t mbedtls_test_srv_crt_len = sizeof( mbedtls_test_srv_crt_rsa );
 const size_t mbedtls_test_srv_key_len = sizeof( mbedtls_test_srv_key_rsa );
-const size_t mbedtls_test_cli_crt_len = sizeof( mbedtls_test_cli_crt_rsa );
+const size_t mbedtls_test_cli_crt_len = sizeof( mbedtls_test_cli_crt_rsa_sha256 );
 const size_t mbedtls_test_cli_key_len = sizeof( mbedtls_test_cli_key_rsa );
 #else /* ! MBEDTLS_RSA_C, so MBEDTLS_ECDSA_C */
 const char *mbedtls_test_ca_crt  = mbedtls_test_ca_crt_ec;
diff --git a/library/cmac.c b/library/cmac.c
index b2fe713..035ad07 100644
--- a/library/cmac.c
+++ b/library/cmac.c
@@ -1,4 +1,4 @@
-/*
+/**
  * \file cmac.c
  *
  * \brief NIST SP800-38B compliant CMAC implementation for AES and 3DES
diff --git a/library/ecp.c b/library/ecp.c
index f51f225..56f22c2 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -49,9 +49,12 @@
 #if defined(MBEDTLS_ECP_C)
 
 #include "mbedtls/ecp.h"
+#include "mbedtls/threading.h"
 
 #include <string.h>
 
+#if !defined(MBEDTLS_ECP_ALT)
+
 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
 #else
@@ -62,6 +65,8 @@
 #define mbedtls_free       free
 #endif
 
+#include "mbedtls/ecp_internal.h"
+
 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
     !defined(inline) && !defined(__cplusplus)
 #define inline __inline
@@ -748,6 +753,12 @@
     if( mbedtls_mpi_cmp_int( &pt->Z, 0 ) == 0 )
         return( 0 );
 
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_normalize_jac( grp, pt );
+    }
+#endif /* MBEDTLS_ECP_NORMALIZE_JAC_ALT */
     mbedtls_mpi_init( &Zi ); mbedtls_mpi_init( &ZZi );
 
     /*
@@ -796,6 +807,13 @@
     if( t_len < 2 )
         return( ecp_normalize_jac( grp, *T ) );
 
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_normalize_jac_many(grp, T, t_len);
+    }
+#endif
+
     if( ( c = mbedtls_calloc( t_len, sizeof( mbedtls_mpi ) ) ) == NULL )
         return( MBEDTLS_ERR_ECP_ALLOC_FAILED );
 
@@ -912,6 +930,13 @@
     dbl_count++;
 #endif
 
+#if defined(MBEDTLS_ECP_DOUBLE_JAC_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_double_jac( grp, R, P );
+    }
+#endif /* MBEDTLS_ECP_DOUBLE_JAC_ALT */
+
     mbedtls_mpi_init( &M ); mbedtls_mpi_init( &S ); mbedtls_mpi_init( &T ); mbedtls_mpi_init( &U );
 
     /* Special case for A = -3 */
@@ -1003,6 +1028,13 @@
     add_count++;
 #endif
 
+#if defined(MBEDTLS_ECP_ADD_MIXED_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_add_mixed( grp, R, P, Q );
+    }
+#endif /* MBEDTLS_ECP_ADD_MIXED_ALT */
+
     /*
      * Trivial cases: P == 0 or Q == 0 (case 1)
      */
@@ -1080,9 +1112,17 @@
 {
     int ret;
     mbedtls_mpi l, ll;
-    size_t p_size = ( grp->pbits + 7 ) / 8;
+    size_t p_size;
     int count = 0;
 
+#if defined(MBEDTLS_ECP_RANDOMIZE_JAC_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_randomize_jac( grp, pt, f_rng, p_rng );
+    }
+#endif /* MBEDTLS_ECP_RANDOMIZE_JAC_ALT */
+
+    p_size = ( grp->pbits + 7 ) / 8;
     mbedtls_mpi_init( &l ); mbedtls_mpi_init( &ll );
 
     /* Generate l such that 1 < l < p */
@@ -1234,6 +1274,7 @@
     MBEDTLS_MPI_CHK( ecp_normalize_jac_many( grp, TT, k ) );
 
 cleanup:
+
     return( ret );
 }
 
@@ -1297,6 +1338,7 @@
     }
 
 cleanup:
+
     mbedtls_ecp_point_free( &Txi );
 
     return( ret );
@@ -1441,6 +1483,13 @@
 {
     int ret;
 
+#if defined(MBEDTLS_ECP_NORMALIZE_MXZ_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_normalize_mxz( grp, P );
+    }
+#endif /* MBEDTLS_ECP_NORMALIZE_MXZ_ALT */
+
     MBEDTLS_MPI_CHK( mbedtls_mpi_inv_mod( &P->Z, &P->Z, &grp->P ) );
     MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &P->X, &P->X, &P->Z ) ); MOD_MUL( P->X );
     MBEDTLS_MPI_CHK( mbedtls_mpi_lset( &P->Z, 1 ) );
@@ -1462,9 +1511,17 @@
 {
     int ret;
     mbedtls_mpi l;
-    size_t p_size = ( grp->pbits + 7 ) / 8;
+    size_t p_size;
     int count = 0;
 
+#if defined(MBEDTLS_ECP_RANDOMIZE_MXZ_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_randomize_mxz( grp, P, f_rng, p_rng );
+    }
+#endif /* MBEDTLS_ECP_RANDOMIZE_MXZ_ALT */
+
+    p_size = ( grp->pbits + 7 ) / 8;
     mbedtls_mpi_init( &l );
 
     /* Generate l such that 1 < l < p */
@@ -1512,6 +1569,13 @@
     int ret;
     mbedtls_mpi A, AA, B, BB, E, C, D, DA, CB;
 
+#if defined(MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT)
+    if ( mbedtls_internal_ecp_grp_capable( grp ) )
+    {
+        return mbedtls_internal_ecp_double_add_mxz( grp, R, S, P, Q, d );
+    }
+#endif /* MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT */
+
     mbedtls_mpi_init( &A ); mbedtls_mpi_init( &AA ); mbedtls_mpi_init( &B );
     mbedtls_mpi_init( &BB ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &C );
     mbedtls_mpi_init( &D ); mbedtls_mpi_init( &DA ); mbedtls_mpi_init( &CB );
@@ -1612,7 +1676,10 @@
              const mbedtls_mpi *m, const mbedtls_ecp_point *P,
              int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+    char is_grp_capable = 0;
+#endif
 
     /* Common sanity checks */
     if( mbedtls_mpi_cmp_int( &P->Z, 1 ) != 0 )
@@ -1622,15 +1689,43 @@
         ( ret = mbedtls_ecp_check_pubkey( grp, P ) ) != 0 )
         return( ret );
 
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+#if defined(MBEDTLS_THREADING_C)
+    if( mbedtls_mutex_lock( &mbedtls_threading_ecp_mutex ) != 0 )
+        return ( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+
+#endif
+    if ( is_grp_capable = mbedtls_internal_ecp_grp_capable( grp )  )
+    {
+        MBEDTLS_MPI_CHK( mbedtls_internal_ecp_init( grp ) );
+    }
+
+#endif /* MBEDTLS_ECP_INTERNAL_ALT */
 #if defined(ECP_MONTGOMERY)
     if( ecp_get_type( grp ) == ECP_TYPE_MONTGOMERY )
-        return( ecp_mul_mxz( grp, R, m, P, f_rng, p_rng ) );
+        ret = ecp_mul_mxz( grp, R, m, P, f_rng, p_rng );
+
 #endif
 #if defined(ECP_SHORTWEIERSTRASS)
     if( ecp_get_type( grp ) == ECP_TYPE_SHORT_WEIERSTRASS )
-        return( ecp_mul_comb( grp, R, m, P, f_rng, p_rng ) );
+        ret = ecp_mul_comb( grp, R, m, P, f_rng, p_rng );
+
 #endif
-    return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+cleanup:
+
+    if ( is_grp_capable )
+    {
+        mbedtls_internal_ecp_free( grp );
+    }
+
+#if defined(MBEDTLS_THREADING_C)
+    if( mbedtls_mutex_unlock( &mbedtls_threading_ecp_mutex ) != 0 )
+        return ( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+
+#endif
+#endif /* MBEDTLS_ECP_INTERNAL_ALT */
+    return( ret );
 }
 
 #if defined(ECP_SHORTWEIERSTRASS)
@@ -1723,6 +1818,9 @@
 {
     int ret;
     mbedtls_ecp_point mP;
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+    char is_grp_capable = 0;
+#endif
 
     if( ecp_get_type( grp ) != ECP_TYPE_SHORT_WEIERSTRASS )
         return( MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE );
@@ -1732,10 +1830,35 @@
     MBEDTLS_MPI_CHK( mbedtls_ecp_mul_shortcuts( grp, &mP, m, P ) );
     MBEDTLS_MPI_CHK( mbedtls_ecp_mul_shortcuts( grp, R,   n, Q ) );
 
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+#if defined(MBEDTLS_THREADING_C)
+    if( mbedtls_mutex_lock( &mbedtls_threading_ecp_mutex ) != 0 )
+        return ( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+
+#endif
+    if (  is_grp_capable = mbedtls_internal_ecp_grp_capable( grp )  )
+    {
+        MBEDTLS_MPI_CHK( mbedtls_internal_ecp_init( grp ) );
+    }
+
+#endif /* MBEDTLS_ECP_INTERNAL_ALT */
     MBEDTLS_MPI_CHK( ecp_add_mixed( grp, R, &mP, R ) );
     MBEDTLS_MPI_CHK( ecp_normalize_jac( grp, R ) );
 
 cleanup:
+
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+    if ( is_grp_capable )
+    {
+        mbedtls_internal_ecp_free( grp );
+    }
+
+#if defined(MBEDTLS_THREADING_C)
+    if( mbedtls_mutex_unlock( &mbedtls_threading_ecp_mutex ) != 0 )
+        return ( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
+
+#endif
+#endif /* MBEDTLS_ECP_INTERNAL_ALT */
     mbedtls_ecp_point_free( &mP );
 
     return( ret );
@@ -2089,4 +2212,6 @@
 
 #endif /* MBEDTLS_SELF_TEST */
 
+#endif /* !MBEDTLS_ECP_ALT */
+
 #endif /* MBEDTLS_ECP_C */
diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index a2a5495..df5ac3e 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -31,6 +31,8 @@
 
 #include <string.h>
 
+#if !defined(MBEDTLS_ECP_ALT)
+
 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
     !defined(inline) && !defined(__cplusplus)
 #define inline __inline
@@ -1322,4 +1324,6 @@
 }
 #endif /* MBEDTLS_ECP_DP_SECP256K1_ENABLED */
 
+#endif /* !MBEDTLS_ECP_ALT */
+
 #endif /* MBEDTLS_ECP_C */
diff --git a/library/pk.c b/library/pk.c
index 10bd0a5..8d13bc5 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -29,6 +29,8 @@
 #include "mbedtls/pk.h"
 #include "mbedtls/pk_internal.h"
 
+#include "mbedtls/bignum.h"
+
 #if defined(MBEDTLS_RSA_C)
 #include "mbedtls/rsa.h"
 #endif
@@ -39,6 +41,8 @@
 #include "mbedtls/ecdsa.h"
 #endif
 
+#include <limits.h>
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
@@ -209,6 +213,11 @@
         int ret;
         const mbedtls_pk_rsassa_pss_options *pss_opts;
 
+#if defined(MBEDTLS_HAVE_INT64)
+        if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
+            return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* MBEDTLS_HAVE_INT64 */
+
         if( options == NULL )
             return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
 
@@ -232,7 +241,7 @@
         return( 0 );
 #else
         return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
-#endif
+#endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */
     }
 
     /* General case: no options */
diff --git a/library/pk_wrap.c b/library/pk_wrap.c
index 712ad48..db6274c 100644
--- a/library/pk_wrap.c
+++ b/library/pk_wrap.c
@@ -30,6 +30,7 @@
 
 /* Even if RSA not activated, for the sake of RSA-alt */
 #include "mbedtls/rsa.h"
+#include "mbedtls/bignum.h"
 
 #include <string.h>
 
@@ -49,6 +50,8 @@
 #define mbedtls_free       free
 #endif
 
+#include <limits.h>
+
 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
@@ -74,6 +77,11 @@
 {
     int ret;
 
+#if defined(MBEDTLS_HAVE_INT64)
+    if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
+        return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* MBEDTLS_HAVE_INT64 */
+
     if( sig_len < ((mbedtls_rsa_context *) ctx)->len )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
@@ -93,6 +101,11 @@
                    unsigned char *sig, size_t *sig_len,
                    int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
 {
+#if defined(MBEDTLS_HAVE_INT64)
+    if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
+        return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* MBEDTLS_HAVE_INT64 */
+
     *sig_len = ((mbedtls_rsa_context *) ctx)->len;
 
     return( mbedtls_rsa_pkcs1_sign( (mbedtls_rsa_context *) ctx, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
@@ -402,6 +415,11 @@
 {
     mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
 
+#if defined(MBEDTLS_HAVE_INT64)
+    if( UINT_MAX < hash_len )
+        return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* MBEDTLS_HAVE_INT64 */
+
     *sig_len = rsa_alt->key_len_func( rsa_alt->key );
 
     return( rsa_alt->sign_func( rsa_alt->key, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
diff --git a/library/rsa.c b/library/rsa.c
index c8c6d99..bdd2538 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -29,6 +29,11 @@
  *  [2] Handbook of Applied Cryptography - 1997, Chapter 8
  *      Menezes, van Oorschot and Vanstone
  *
+ *  [3] Malware Guard Extension: Using SGX to Conceal Cache Attacks
+ *      Michael Schwarz, Samuel Weiser, Daniel Gruss, Clémentine Maurice and
+ *      Stefan Mangard
+ *      https://arxiv.org/abs/1702.08719v2
+ *
  */
 
 #if !defined(MBEDTLS_CONFIG_FILE)
@@ -61,6 +66,11 @@
 #define mbedtls_free   free
 #endif
 
+/* Implementation that should never be optimized out by the compiler */
+static void mbedtls_zeroize( void *v, size_t n ) {
+    volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0;
+}
+
 /*
  * Initialize an RSA context
  */
@@ -357,6 +367,27 @@
 }
 
 /*
+ * Exponent blinding supposed to prevent side-channel attacks using multiple
+ * traces of measurements to recover the RSA key. The more collisions are there,
+ * the more bits of the key can be recovered. See [3].
+ *
+ * Collecting n collisions with m bit long blinding value requires 2^(m-m/n)
+ * observations on avarage.
+ *
+ * For example with 28 byte blinding to achieve 2 collisions the adversary has
+ * to make 2^112 observations on avarage.
+ *
+ * (With the currently (as of 2017 April) known best algorithms breaking 2048
+ * bit RSA requires approximately as much time as trying out 2^112 random keys.
+ * Thus in this sense with 28 byte blinding the security is not reduced by
+ * side-channel attacks like the one in [3])
+ *
+ * This countermeasure does not help if the key recovery is possible with a
+ * single trace.
+ */
+#define RSA_EXPONENT_BLINDING 28
+
+/*
  * Do an RSA private key operation
  */
 int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
@@ -368,12 +399,34 @@
     int ret;
     size_t olen;
     mbedtls_mpi T, T1, T2;
+    mbedtls_mpi P1, Q1, R;
+#if defined(MBEDTLS_RSA_NO_CRT)
+    mbedtls_mpi D_blind;
+    mbedtls_mpi *D = &ctx->D;
+#else
+    mbedtls_mpi DP_blind, DQ_blind;
+    mbedtls_mpi *DP = &ctx->DP;
+    mbedtls_mpi *DQ = &ctx->DQ;
+#endif
 
     /* Make sure we have private key info, prevent possible misuse */
     if( ctx->P.p == NULL || ctx->Q.p == NULL || ctx->D.p == NULL )
         return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
 
     mbedtls_mpi_init( &T ); mbedtls_mpi_init( &T1 ); mbedtls_mpi_init( &T2 );
+    mbedtls_mpi_init( &P1 ); mbedtls_mpi_init( &Q1 ); mbedtls_mpi_init( &R );
+
+
+    if( f_rng != NULL )
+    {
+#if defined(MBEDTLS_RSA_NO_CRT)
+        mbedtls_mpi_init( &D_blind );
+#else
+        mbedtls_mpi_init( &DP_blind );
+        mbedtls_mpi_init( &DQ_blind );
+#endif
+    }
+
 
 #if defined(MBEDTLS_THREADING_C)
     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
@@ -396,19 +449,60 @@
         MBEDTLS_MPI_CHK( rsa_prepare_blinding( ctx, f_rng, p_rng ) );
         MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &T, &T, &ctx->Vi ) );
         MBEDTLS_MPI_CHK( mbedtls_mpi_mod_mpi( &T, &T, &ctx->N ) );
+
+        /*
+         * Exponent blinding
+         */
+        MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &P1, &ctx->P, 1 ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_sub_int( &Q1, &ctx->Q, 1 ) );
+
+#if defined(MBEDTLS_RSA_NO_CRT)
+        /*
+         * D_blind = ( P - 1 ) * ( Q - 1 ) * R + D
+         */
+        MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, RSA_EXPONENT_BLINDING,
+                         f_rng, p_rng ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &D_blind, &P1, &Q1 ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &D_blind, &D_blind, &R ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &D_blind, &D_blind, &ctx->D ) );
+
+        D = &D_blind;
+#else
+        /*
+         * DP_blind = ( P - 1 ) * R + DP
+         */
+        MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, RSA_EXPONENT_BLINDING,
+                         f_rng, p_rng ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &DP_blind, &P1, &R ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &DP_blind, &DP_blind,
+                    &ctx->DP ) );
+
+        DP = &DP_blind;
+
+        /*
+         * DQ_blind = ( Q - 1 ) * R + DQ
+         */
+        MBEDTLS_MPI_CHK( mbedtls_mpi_fill_random( &R, RSA_EXPONENT_BLINDING,
+                         f_rng, p_rng ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_mul_mpi( &DQ_blind, &Q1, &R ) );
+        MBEDTLS_MPI_CHK( mbedtls_mpi_add_mpi( &DQ_blind, &DQ_blind,
+                    &ctx->DQ ) );
+
+        DQ = &DQ_blind;
+#endif /* MBEDTLS_RSA_NO_CRT */
     }
 
 #if defined(MBEDTLS_RSA_NO_CRT)
-    MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T, &T, &ctx->D, &ctx->N, &ctx->RN ) );
+    MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T, &T, D, &ctx->N, &ctx->RN ) );
 #else
     /*
-     * faster decryption using the CRT
+     * Faster decryption using the CRT
      *
      * T1 = input ^ dP mod P
      * T2 = input ^ dQ mod Q
      */
-    MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T1, &T, &ctx->DP, &ctx->P, &ctx->RP ) );
-    MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T2, &T, &ctx->DQ, &ctx->Q, &ctx->RQ ) );
+    MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T1, &T, DP, &ctx->P, &ctx->RP ) );
+    MBEDTLS_MPI_CHK( mbedtls_mpi_exp_mod( &T2, &T, DQ, &ctx->Q, &ctx->RQ ) );
 
     /*
      * T = (T1 - T2) * (Q^-1 mod P) mod P
@@ -444,6 +538,17 @@
 #endif
 
     mbedtls_mpi_free( &T ); mbedtls_mpi_free( &T1 ); mbedtls_mpi_free( &T2 );
+    mbedtls_mpi_free( &P1 ); mbedtls_mpi_free( &Q1 ); mbedtls_mpi_free( &R );
+
+    if( f_rng != NULL )
+    {
+#if defined(MBEDTLS_RSA_NO_CRT)
+        mbedtls_mpi_free( &D_blind );
+#else
+        mbedtls_mpi_free( &DP_blind );
+        mbedtls_mpi_free( &DQ_blind );
+#endif
+    }
 
     if( ret != 0 )
         return( MBEDTLS_ERR_RSA_PRIVATE_FAILED + ret );
@@ -496,6 +601,8 @@
 
         dlen -= use_len;
     }
+
+    mbedtls_zeroize( mask, sizeof( mask ) );
 }
 #endif /* MBEDTLS_PKCS1_V21 */
 
@@ -724,7 +831,7 @@
           : mbedtls_rsa_private( ctx, f_rng, p_rng, input, buf );
 
     if( ret != 0 )
-        return( ret );
+        goto cleanup;
 
     /*
      * Unmask data and generate lHash
@@ -733,7 +840,7 @@
     if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 )
     {
         mbedtls_md_free( &md_ctx );
-        return( ret );
+        goto cleanup;
     }
 
 
@@ -784,15 +891,26 @@
      * the different error conditions.
      */
     if( bad != 0 )
-        return( MBEDTLS_ERR_RSA_INVALID_PADDING );
+    {
+        ret = MBEDTLS_ERR_RSA_INVALID_PADDING;
+        goto cleanup;
+    }
 
     if( ilen - ( p - buf ) > output_max_len )
-        return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
+    {
+        ret = MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE;
+        goto cleanup;
+    }
 
     *olen = ilen - (p - buf);
     memcpy( output, p, *olen );
+    ret = 0;
 
-    return( 0 );
+cleanup:
+    mbedtls_zeroize( buf, sizeof( buf ) );
+    mbedtls_zeroize( lhash, sizeof( lhash ) );
+
+    return( ret );
 }
 #endif /* MBEDTLS_PKCS1_V21 */
 
@@ -826,7 +944,7 @@
           : mbedtls_rsa_private( ctx, f_rng, p_rng, input, buf );
 
     if( ret != 0 )
-        return( ret );
+        goto cleanup;
 
     p = buf;
     bad = 0;
@@ -871,15 +989,25 @@
     bad |= ( pad_count < 8 );
 
     if( bad )
-        return( MBEDTLS_ERR_RSA_INVALID_PADDING );
+    {
+        ret = MBEDTLS_ERR_RSA_INVALID_PADDING;
+        goto cleanup;
+    }
 
     if( ilen - ( p - buf ) > output_max_len )
-        return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
+    {
+        ret = MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE;
+        goto cleanup;
+    }
 
     *olen = ilen - (p - buf);
     memcpy( output, p, *olen );
+    ret = 0;
 
-    return( 0 );
+cleanup:
+    mbedtls_zeroize( buf, sizeof( buf ) );
+
+    return( ret );
 }
 #endif /* MBEDTLS_PKCS1_V15 */
 
@@ -981,6 +1109,7 @@
     if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 0 ) ) != 0 )
     {
         mbedtls_md_free( &md_ctx );
+        /* No need to zeroize salt: we didn't use it. */
         return( ret );
     }
 
@@ -990,6 +1119,7 @@
     mbedtls_md_update( &md_ctx, hash, hashlen );
     mbedtls_md_update( &md_ctx, salt, slen );
     mbedtls_md_finish( &md_ctx, p );
+    mbedtls_zeroize( salt, sizeof( salt ) );
 
     /* Compensate for boundary condition when applying mask */
     if( msb % 8 == 0 )
@@ -1337,7 +1467,7 @@
 {
     int ret;
     size_t len, siglen, asn1_len;
-    unsigned char *p, *end;
+    unsigned char *p, *p0, *end;
     mbedtls_md_type_t msg_md_alg;
     const mbedtls_md_info_t *md_info;
     mbedtls_asn1_buf oid;
@@ -1393,24 +1523,29 @@
     end = p + len;
 
     /*
-     * Parse the ASN.1 structure inside the PKCS#1 v1.5 structure
+     * Parse the ASN.1 structure inside the PKCS#1 v1.5 structure.
+     * Insist on 2-byte length tags, to protect against variants of
+     * Bleichenbacher's forgery attack against lax PKCS#1v1.5 verification.
      */
+    p0 = p;
     if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len,
             MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
-
-    if( asn1_len + 2 != len )
+    if( p != p0 + 2 || asn1_len + 2 != len )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
+    p0 = p;
     if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len,
             MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
-
-    if( asn1_len + 6 + hashlen != len )
+    if( p != p0 + 2 || asn1_len + 6 + hashlen != len )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
+    p0 = p;
     if( ( ret = mbedtls_asn1_get_tag( &p, end, &oid.len, MBEDTLS_ASN1_OID ) ) != 0 )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
+    if( p != p0 + 2 )
+        return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
     oid.p = p;
     p += oid.len;
@@ -1424,13 +1559,16 @@
     /*
      * assume the algorithm parameters must be NULL
      */
+    p0 = p;
     if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len, MBEDTLS_ASN1_NULL ) ) != 0 )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
-
-    if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
+    if( p != p0 + 2 )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
-    if( asn1_len != hashlen )
+    p0 = p;
+    if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
+        return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
+    if( p != p0 + 2 || asn1_len != hashlen )
         return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
 
     if( memcmp( p, hash, hashlen ) != 0 )
diff --git a/library/ssl_ciphersuites.c b/library/ssl_ciphersuites.c
index a762bf7..c1a92d6 100644
--- a/library/ssl_ciphersuites.c
+++ b/library/ssl_ciphersuites.c
@@ -1817,41 +1817,23 @@
             return( MBEDTLS_PK_NONE );
     }
 }
-#endif /* MBEDTLS_PK_C */
 
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
-int mbedtls_ssl_ciphersuite_uses_ec( const mbedtls_ssl_ciphersuite_t *info )
+mbedtls_pk_type_t mbedtls_ssl_get_ciphersuite_sig_alg( const mbedtls_ssl_ciphersuite_t *info )
 {
     switch( info->key_exchange )
     {
+        case MBEDTLS_KEY_EXCHANGE_RSA:
+        case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
         case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
+            return( MBEDTLS_PK_RSA );
+
         case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
-        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
-        case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
-        case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
-            return( 1 );
+            return( MBEDTLS_PK_ECDSA );
 
         default:
-            return( 0 );
+            return( MBEDTLS_PK_NONE );
     }
 }
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-int mbedtls_ssl_ciphersuite_uses_psk( const mbedtls_ssl_ciphersuite_t *info )
-{
-    switch( info->key_exchange )
-    {
-        case MBEDTLS_KEY_EXCHANGE_PSK:
-        case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
-        case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
-        case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
-            return( 1 );
-
-        default:
-            return( 0 );
-    }
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+#endif /* MBEDTLS_PK_C */
 
 #endif /* MBEDTLS_SSL_TLS_C */
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 223823b..616cadc 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -264,11 +264,12 @@
 
 #if defined(MBEDTLS_ECP_C)
     for( grp_id = ssl->conf->curve_list; *grp_id != MBEDTLS_ECP_DP_NONE; grp_id++ )
-    {
-        info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
 #else
     for( info = mbedtls_ecp_curve_list(); info->grp_id != MBEDTLS_ECP_DP_NONE; info++ )
+#endif
     {
+#if defined(MBEDTLS_ECP_C)
+        info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
 #endif
         if( info == NULL )
         {
@@ -289,11 +290,12 @@
 
 #if defined(MBEDTLS_ECP_C)
     for( grp_id = ssl->conf->curve_list; *grp_id != MBEDTLS_ECP_DP_NONE; grp_id++ )
-    {
-        info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
 #else
     for( info = mbedtls_ecp_curve_list(); info->grp_id != MBEDTLS_ECP_DP_NONE; info++ )
+#endif
     {
+#if defined(MBEDTLS_ECP_C)
+        info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
 #endif
         elliptic_curve_list[elliptic_curve_len++] = info->tls_id >> 8;
         elliptic_curve_list[elliptic_curve_len++] = info->tls_id & 0xFF;
@@ -1055,8 +1057,6 @@
                                          const unsigned char *buf,
                                          size_t len )
 {
-    int ret;
-
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
     if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
     {
@@ -1069,10 +1069,8 @@
                           ssl->peer_verify_data, ssl->verify_data_len ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
-
-            if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                return( ret );
-
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
         }
     }
@@ -1082,10 +1080,8 @@
         if( len != 1 || buf[0] != 0x00 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
-
-            if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                return( ret );
-
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
         }
 
@@ -1108,6 +1104,9 @@
         len != 1 ||
         buf[0] != ssl->conf->mfl_code )
     {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching max fragment length extension" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1123,6 +1122,9 @@
     if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED ||
         len != 0 )
     {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching truncated HMAC extension" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1143,6 +1145,9 @@
         ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
         len != 0 )
     {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching encrypt-then-MAC extension" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1163,6 +1168,9 @@
         ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
         len != 0 )
     {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching extended master secret extension" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1182,6 +1190,9 @@
     if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED ||
         len != 0 )
     {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching session ticket extension" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1206,6 +1217,8 @@
     if( list_size + 1 != len )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1217,7 +1230,7 @@
         {
 #if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
             ssl->handshake->ecdh_ctx.point_format = p[0];
-#endif            
+#endif
 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
             ssl->handshake->ecjpake_ctx.point_format = p[0];
 #endif
@@ -1230,6 +1243,8 @@
     }
 
     MBEDTLS_SSL_DEBUG_MSG( 1, ( "no point format in common" ) );
+    mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                    MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
     return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
 }
 #endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C || 
@@ -1258,6 +1273,8 @@
                                                 buf, len ) ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( ret );
     }
 
@@ -1274,7 +1291,12 @@
 
     /* If we didn't send it, the server shouldn't send it */
     if( ssl->conf->alpn_list == NULL )
+    {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching ALPN extension" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+    }
 
     /*
      * opaque ProtocolName<1..2^8-1>;
@@ -1288,15 +1310,27 @@
 
     /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
     if( len < 4 )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+    }
 
     list_len = ( buf[0] << 8 ) | buf[1];
     if( list_len != len - 2 )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+    }
 
     name_len = buf[2];
     if( name_len != list_len - 1 )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+    }
 
     /* Check that the server chosen protocol was in our list and save it */
     for( p = ssl->conf->alpn_list; *p != NULL; p++ )
@@ -1309,6 +1343,9 @@
         }
     }
 
+    MBEDTLS_SSL_DEBUG_MSG( 1, ( "ALPN extension: no matching protocol" ) );
+    mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                    MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
     return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
 }
 #endif /* MBEDTLS_SSL_ALPN */
@@ -1413,6 +1450,7 @@
 
     if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
     {
+        /* No alert on a read error. */
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
         return( ret );
     }
@@ -1438,6 +1476,8 @@
 #endif /* MBEDTLS_SSL_RENEGOTIATION */
 
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
@@ -1464,6 +1504,8 @@
         buf[0] != MBEDTLS_SSL_HS_SERVER_HELLO )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1518,6 +1560,8 @@
     if( n > 32 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1530,6 +1574,8 @@
             ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + 40 + n + ext_len )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
         }
     }
@@ -1540,6 +1586,8 @@
     else
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1567,6 +1615,8 @@
 #endif/* MBEDTLS_ZLIB_SUPPORT */
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "server hello, bad compression: %d", comp ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
         return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
     }
 
@@ -1578,6 +1628,8 @@
     if( ssl->transform_negotiate->ciphersuite_info == NULL )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "ciphersuite info for %04x not found", i ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
 
@@ -1615,6 +1667,8 @@
         if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
             return( ret );
         }
     }
@@ -1634,6 +1688,8 @@
         )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1645,6 +1701,8 @@
         if( ssl->conf->ciphersuite_list[ssl->minor_ver][i] == 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
         }
 
@@ -1662,6 +1720,8 @@
       )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
     ssl->session_negotiate->compression = comp;
@@ -1680,6 +1740,8 @@
         if( ext_size + 4 > ext_len )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
         }
 
@@ -1850,9 +1912,8 @@
 
     if( handshake_failure == 1 )
     {
-        if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-            return( ret );
-
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
     }
 
@@ -1991,7 +2052,8 @@
 
     if( (*p) + len > end )
     {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message (psk_identity_hint length)" ) );
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
+                                    "(psk_identity_hint length)" ) );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
     }
 
@@ -2133,8 +2195,8 @@
      */
     if( mbedtls_ssl_check_sig_hash( ssl, *md_alg ) != 0 )
     {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used HashAlgorithm "
-                                    "that was not offered" ) );
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used HashAlgorithm %d that was not offered",
+                                    *(p)[0] ) );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
     }
 
@@ -2192,7 +2254,8 @@
 static int ssl_parse_server_key_exchange( mbedtls_ssl_context *ssl )
 {
     int ret;
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
     unsigned char *p, *end;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server key exchange" ) );
@@ -2216,6 +2279,8 @@
         if( ( ret = ssl_get_ecdh_params_from_cert( ssl ) ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "ssl_get_ecdh_params_from_cert", ret );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( ret );
         }
 
@@ -2237,6 +2302,8 @@
     if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
@@ -2254,6 +2321,8 @@
         }
 
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
@@ -2270,6 +2339,8 @@
         if( ssl_parse_server_psk_hint( ssl, &p, end ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
         }
     } /* FALLTROUGH */
@@ -2291,6 +2362,8 @@
         if( ssl_parse_server_dh_params( ssl, &p, end ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
         }
     }
@@ -2307,6 +2380,8 @@
         if( ssl_parse_server_ecdh_params( ssl, &p, end ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
         }
     }
@@ -2322,6 +2397,8 @@
         if( ret != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_two", ret );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
         }
     }
@@ -2332,12 +2409,8 @@
         return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
     }
 
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) ||                       \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) ||                     \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
+    if( mbedtls_ssl_ciphersuite_uses_server_signature( ciphersuite_info ) )
     {
         size_t sig_len, hashlen;
         unsigned char hash[64];
@@ -2356,12 +2429,16 @@
                                                &md_alg, &pk_alg ) != 0 )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
                 return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
             }
 
             if( pk_alg != mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info ) )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
                 return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
             }
         }
@@ -2393,6 +2470,8 @@
         if( end != p + sig_len )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
         }
 
@@ -2464,6 +2543,8 @@
                                      mbedtls_md_info_from_type( md_alg ), 0 ) ) != 0 )
             {
                 MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
                 return( ret );
             }
 
@@ -2487,6 +2568,8 @@
         if( ssl->session_negotiate->peer_cert == NULL )
         {
             MBEDTLS_SSL_DEBUG_MSG( 2, ( "certificate required" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
         }
 
@@ -2496,19 +2579,21 @@
         if( ! mbedtls_pk_can_do( &ssl->session_negotiate->peer_cert->pk, pk_alg ) )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
         }
 
         if( ( ret = mbedtls_pk_verify( &ssl->session_negotiate->peer_cert->pk,
                                md_alg, hash, hashlen, p, sig_len ) ) != 0 )
         {
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR );
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_verify", ret );
             return( ret );
         }
     }
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
-          MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
-          MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
 
 exit:
     ssl->state++;
@@ -2518,23 +2603,15 @@
     return( 0 );
 }
 
-#if !defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)       && \
-    !defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)   && \
-    !defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)  && \
-    !defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
-    !defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)&& \
-    !defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
+#if ! defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
 static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
 {
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
 
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
+    if( ! mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
     {
         MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
         ssl->state++;
@@ -2544,22 +2621,19 @@
     MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
     return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
 }
-#else
+#else /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
 static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
 {
     int ret;
     unsigned char *buf;
     size_t n = 0;
     size_t cert_type_len = 0, dn_len = 0;
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
 
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
+    if( ! mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
     {
         MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
         ssl->state++;
@@ -2577,6 +2651,8 @@
         if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
             return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
         }
 
@@ -2630,6 +2706,8 @@
     if( ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
     }
 
@@ -2645,7 +2723,8 @@
 
         for( i = 0; i < sig_alg_len; i += 2 )
         {
-            MBEDTLS_SSL_DEBUG_MSG( 3, ( "Supported Signature Algorithm found: %d,%d", sig_alg[i], sig_alg[i + 1]  ) );
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "Supported Signature Algorithm found: %d"
+                                        ",%d", sig_alg[i], sig_alg[i + 1]  ) );
         }
 #endif
 
@@ -2654,6 +2733,8 @@
         if( ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
         }
     }
@@ -2667,6 +2748,8 @@
     if( ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
     }
 
@@ -2675,12 +2758,7 @@
 
     return( 0 );
 }
-#endif /* !MBEDTLS_KEY_EXCHANGE_RSA_ENABLED &&
-          !MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED &&
-          !MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED &&
-          !MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED &&
-          !MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED &&
-          !MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
 
 static int ssl_parse_server_hello_done( mbedtls_ssl_context *ssl )
 {
@@ -2708,6 +2786,8 @@
         ssl->in_msg[0] != MBEDTLS_SSL_HS_SERVER_HELLO_DONE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE );
     }
 
@@ -2727,7 +2807,8 @@
 {
     int ret;
     size_t i, n;
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write client key exchange" ) );
 
@@ -2814,10 +2895,7 @@
           MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
           MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
 #if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
+    if( mbedtls_ssl_ciphersuite_uses_psk( ciphersuite_info ) )
     {
         /*
          * opaque psk_identity<0..2^16-1>;
@@ -2987,7 +3065,8 @@
     !defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
 static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
 {
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
     int ret;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
@@ -3016,7 +3095,8 @@
 static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
 {
     int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
     size_t n = 0, offset = 0;
     unsigned char hash[48];
     unsigned char *hash_start = hash;
@@ -3188,6 +3268,8 @@
     if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
@@ -3205,6 +3287,8 @@
         ssl->in_hslen < 6 + mbedtls_ssl_hs_hdr_len( ssl ) )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
     }
 
@@ -3218,6 +3302,8 @@
     if( ticket_len + 6 + mbedtls_ssl_hs_hdr_len( ssl ) != ssl->in_hslen )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
     }
 
@@ -3243,6 +3329,8 @@
     if( ( ticket = mbedtls_calloc( 1, ticket_len ) ) == NULL )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "ticket alloc failed" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
         return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
     }
 
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index fc0d2d7..f137c3d 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -101,6 +101,8 @@
     if( servername_list_size + 2 != len )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -111,6 +113,8 @@
         if( hostname_len + 3 > servername_list_size )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
         }
 
@@ -135,6 +139,8 @@
     if( servername_list_size != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -146,8 +152,6 @@
                                          const unsigned char *buf,
                                          size_t len )
 {
-    int ret;
-
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
     if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
     {
@@ -158,10 +162,8 @@
                           ssl->verify_data_len ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
-
-            if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                return( ret );
-
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
         }
     }
@@ -171,10 +173,8 @@
         if( len != 1 || buf[0] != 0x0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
-
-            if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                return( ret );
-
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
         }
 
@@ -186,47 +186,84 @@
 
 #if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
     defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+
+/*
+ * Status of the implementation of signature-algorithms extension:
+ *
+ * Currently, we are only considering the signature-algorithm extension
+ * to pick a ciphersuite which allows us to send the ServerKeyExchange
+ * message with a signature-hash combination that the user allows.
+ *
+ * We do *not* check whether all certificates in our certificate
+ * chain are signed with an allowed signature-hash pair.
+ * This needs to be done at a later stage.
+ *
+ */
 static int ssl_parse_signature_algorithms_ext( mbedtls_ssl_context *ssl,
                                                const unsigned char *buf,
                                                size_t len )
 {
     size_t sig_alg_list_size;
+
     const unsigned char *p;
     const unsigned char *end = buf + len;
-    const int *md_cur;
 
+    mbedtls_md_type_t md_cur;
+    mbedtls_pk_type_t sig_cur;
 
     sig_alg_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
     if( sig_alg_list_size + 2 != len ||
         sig_alg_list_size % 2 != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
-    /*
-     * For now, ignore the SignatureAlgorithm part and rely on offered
-     * ciphersuites only for that part. To be fixed later.
+    /* Currently we only guarantee signing the ServerKeyExchange message according
+     * to the constraints specified in this extension (see above), so it suffices
+     * to remember only one suitable hash for each possible signature algorithm.
      *
-     * So, just look at the HashAlgorithm part.
+     * This will change when we also consider certificate signatures,
+     * in which case we will need to remember the whole signature-hash
+     * pair list from the extension.
      */
-    for( md_cur = ssl->conf->sig_hashes; *md_cur != MBEDTLS_MD_NONE; md_cur++ ) {
-        for( p = buf + 2; p < end; p += 2 ) {
-            if( *md_cur == (int) mbedtls_ssl_md_alg_from_hash( p[0] ) ) {
-                ssl->handshake->sig_alg = p[0];
-                goto have_sig_alg;
-            }
+
+    for( p = buf + 2; p < end; p += 2 )
+    {
+        /* Silently ignore unknown signature or hash algorithms. */
+
+        if( ( sig_cur = mbedtls_ssl_pk_alg_from_sig( p[1] ) ) == MBEDTLS_PK_NONE )
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext"
+                                        " unknown sig alg encoding %d", p[1] ) );
+            continue;
+        }
+
+        /* Check if we support the hash the user proposes */
+        md_cur = mbedtls_ssl_md_alg_from_hash( p[0] );
+        if( md_cur == MBEDTLS_MD_NONE )
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext:"
+                                        " unknown hash alg encoding %d", p[0] ) );
+            continue;
+        }
+
+        if( mbedtls_ssl_check_sig_hash( ssl, md_cur ) == 0 )
+        {
+            mbedtls_ssl_sig_hash_set_add( &ssl->handshake->hash_algs, sig_cur, md_cur );
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext:"
+                                        " match sig %d and hash %d",
+                                        sig_cur, md_cur ) );
+        }
+        else
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext: "
+                                        "hash alg %d not supported", md_cur ) );
         }
     }
 
-    /* Some key echanges do not need signatures at all */
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "no signature_algorithm in common" ) );
-    return( 0 );
-
-have_sig_alg:
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext: %d",
-                   ssl->handshake->sig_alg ) );
-
     return( 0 );
 }
 #endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
@@ -247,6 +284,8 @@
         list_size % 2 != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -254,6 +293,8 @@
     if( ssl->handshake->curves != NULL )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -264,7 +305,11 @@
         our_size = MBEDTLS_ECP_DP_MAX;
 
     if( ( curves = mbedtls_calloc( our_size, sizeof( *curves ) ) ) == NULL )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
         return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
+    }
 
     ssl->handshake->curves = curves;
 
@@ -297,6 +342,8 @@
     if( list_size + 1 != len )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -342,6 +389,8 @@
                                                 buf, len ) ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
         return( ret );
     }
 
@@ -360,6 +409,8 @@
     if( len != 1 || buf[0] >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -377,6 +428,8 @@
     if( len != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -397,6 +450,8 @@
     if( len != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -420,6 +475,8 @@
     if( len != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -531,11 +588,19 @@
 
     /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
     if( len < 4 )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+    }
 
     list_len = ( buf[0] << 8 ) | buf[1];
     if( list_len != len - 2 )
+    {
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+    }
 
     /*
      * Use our order of preference
@@ -549,13 +614,21 @@
         {
             /* If the list is well formed, we should get equality first */
             if( theirs > end )
+            {
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+            }
 
             cur_len = *theirs++;
 
             /* Empty strings MUST NOT be included */
             if( cur_len == 0 )
+            {
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+            }
 
             if( cur_len == ours_len &&
                 memcmp( theirs, *ours, cur_len ) == 0 )
@@ -607,7 +680,8 @@
                           const mbedtls_ssl_ciphersuite_t * ciphersuite_info )
 {
     mbedtls_ssl_key_cert *cur, *list, *fallback = NULL;
-    mbedtls_pk_type_t pk_alg = mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
+    mbedtls_pk_type_t pk_alg =
+        mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
     uint32_t flags;
 
 #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
@@ -710,6 +784,11 @@
 {
     const mbedtls_ssl_ciphersuite_t *suite_info;
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)    
+    mbedtls_pk_type_t sig_type;
+#endif
+
     suite_info = mbedtls_ssl_ciphersuite_from_id( suite_id );
     if( suite_info == NULL )
     {
@@ -776,6 +855,25 @@
     }
 #endif
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+    /* If the ciphersuite requires signing, check whether
+     * a suitable hash algorithm is present. */
+    if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
+    {
+        sig_type = mbedtls_ssl_get_ciphersuite_sig_alg( suite_info );
+        if( sig_type != MBEDTLS_PK_NONE &&
+            mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs, sig_type ) == MBEDTLS_MD_NONE )
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no suitable hash algorithm "
+                                        "for signature algorithm %d", sig_type ) );
+            return( 0 );
+        }
+    }
+
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
+          MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     /*
      * Final check: if ciphersuite requires us to have a
@@ -813,10 +911,8 @@
     if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "client hello v2 illegal for renegotiation" ) );
-
-        if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-            return( ret );
-
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 #endif /* MBEDTLS_SSL_RENEGOTIATION */
@@ -962,9 +1058,8 @@
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV "
                                     "during renegotiation" ) );
 
-                if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                    return( ret );
-
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
 #endif /* MBEDTLS_SSL_RENEGOTIATION */
@@ -1002,11 +1097,9 @@
     ciphersuite_info = NULL;
 #if defined(MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
     for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
-    {
         for( i = 0; ciphersuites[i] != 0; i++ )
 #else
     for( i = 0; ciphersuites[i] != 0; i++ )
-    {
         for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
 #endif
         {
@@ -1024,7 +1117,6 @@
             if( ciphersuite_info != NULL )
                 goto have_ciphersuite_v2;
         }
-    }
 
     if( got_common_suite )
     {
@@ -1051,10 +1143,8 @@
         ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
-
-        if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-            return( ret );
-
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -1067,6 +1157,9 @@
 }
 #endif /* MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO */
 
+/* This function doesn't alert on errors that happen early during
+   ClientHello parsing because they might indicate that the client is
+   not talking SSL/TLS at all and would not understand our alert. */
 static int ssl_parse_client_hello( mbedtls_ssl_context *ssl )
 {
     int ret, got_common_suite;
@@ -1085,6 +1178,15 @@
     const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
     int major, minor;
 
+    /* If there is no signature-algorithm extension present,
+     * we need to fall back to the default values for allowed
+     * signature-hash pairs. */
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+    int sig_hash_alg_ext_present = 0;
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
+          MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client hello" ) );
 
 #if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
@@ -1101,6 +1203,7 @@
     {
         if( ( ret = mbedtls_ssl_fetch_input( ssl, 5 ) ) != 0 )
         {
+            /* No alert on a read error. */
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
             return( ret );
         }
@@ -1113,7 +1216,7 @@
     if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_STREAM )
 #endif
         if( ( buf[0] & 0x80 ) != 0 )
-            return ssl_parse_client_hello_v2( ssl );
+            return( ssl_parse_client_hello_v2( ssl ) );
 #endif
 
     MBEDTLS_SSL_DEBUG_BUF( 4, "record header", buf, mbedtls_ssl_hdr_len( ssl ) );
@@ -1204,7 +1307,8 @@
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
         }
 
-        if( ( ret = mbedtls_ssl_fetch_input( ssl, mbedtls_ssl_hdr_len( ssl ) + msg_len ) ) != 0 )
+        if( ( ret = mbedtls_ssl_fetch_input( ssl,
+                       mbedtls_ssl_hdr_len( ssl ) + msg_len ) ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
             return( ret );
@@ -1352,10 +1456,8 @@
                             " [%d:%d] < [%d:%d]",
                             ssl->major_ver, ssl->minor_ver,
                             ssl->conf->min_major_ver, ssl->conf->min_minor_ver ) );
-
         mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
                                      MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
-
         return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
     }
 
@@ -1383,6 +1485,8 @@
         sess_len + 34 + 2 > msg_len ) /* 2 for cipherlist length field */
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -1406,6 +1510,8 @@
         if( cookie_offset + 1 + cookie_len + 2 > msg_len )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
         }
 
@@ -1438,6 +1544,7 @@
             /* We know we didn't send a cookie, so it should be empty */
             if( cookie_len != 0 )
             {
+                /* This may be an attacker's probe, so don't send an alert */
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
@@ -1462,6 +1569,8 @@
         ( ciph_len % 2 ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -1480,6 +1589,8 @@
         comp_len + comp_offset + 1 > msg_len )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -1518,6 +1629,8 @@
             if( msg_len < ext_offset + 2 )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
 
@@ -1528,6 +1641,8 @@
                 msg_len != ext_offset + 2 + ext_len )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
         }
@@ -1547,6 +1662,8 @@
             if( ext_size + 4 > ext_len )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
             switch( ext_id )
@@ -1582,10 +1699,11 @@
                 if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
                     break;
 #endif
-
                 ret = ssl_parse_signature_algorithms_ext( ssl, ext + 4, ext_size );
                 if( ret != 0 )
                     return( ret );
+
+                sig_hash_alg_ext_present = 1;
                 break;
 #endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
           MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
@@ -1692,6 +1810,8 @@
             if( ext_len > 0 && ext_len < 4 )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
         }
@@ -1700,7 +1820,7 @@
 #endif
 
 #if defined(MBEDTLS_SSL_FALLBACK_SCSV)
-    for( i = 0, p = buf + 41 + sess_len; i < ciph_len; i += 2, p += 2 )
+    for( i = 0, p = buf + ciph_offset + 2; i < ciph_len; i += 2, p += 2 )
     {
         if( p[0] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 ) & 0xff ) &&
             p[1] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE      ) & 0xff ) )
@@ -1722,6 +1842,26 @@
     }
 #endif /* MBEDTLS_SSL_FALLBACK_SCSV */
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+
+    /*
+     * Try to fall back to default hash SHA1 if the client
+     * hasn't provided any preferred signature-hash combinations.
+     */
+    if( sig_hash_alg_ext_present == 0 )
+    {
+        mbedtls_md_type_t md_default = MBEDTLS_MD_SHA1;
+
+        if( mbedtls_ssl_check_sig_hash( ssl, md_default ) != 0 )
+            md_default = MBEDTLS_MD_NONE;
+
+        mbedtls_ssl_sig_hash_set_const_hash( &ssl->handshake->hash_algs, md_default );
+    }
+
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
+          MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
     /*
      * Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV
      */
@@ -1733,11 +1873,10 @@
 #if defined(MBEDTLS_SSL_RENEGOTIATION)
             if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
             {
-                MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV during renegotiation" ) );
-
-                if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                    return( ret );
-
+                MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV "
+                                            "during renegotiation" ) );
+                mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
                 return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
             }
 #endif
@@ -1781,9 +1920,8 @@
 
     if( handshake_failure == 1 )
     {
-        if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-            return( ret );
-
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
     }
 
@@ -1797,11 +1935,9 @@
     ciphersuite_info = NULL;
 #if defined(MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
     for( j = 0, p = buf + ciph_offset + 2; j < ciph_len; j += 2, p += 2 )
-    {
         for( i = 0; ciphersuites[i] != 0; i++ )
 #else
     for( i = 0; ciphersuites[i] != 0; i++ )
-    {
         for( j = 0, p = buf + ciph_offset + 2; j < ciph_len; j += 2, p += 2 )
 #endif
         {
@@ -1818,19 +1954,20 @@
             if( ciphersuite_info != NULL )
                 goto have_ciphersuite;
         }
-    }
 
     if( got_common_suite )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "got ciphersuites in common, "
                             "but none of them usable" ) );
-        mbedtls_ssl_send_fatal_handshake_failure( ssl );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE );
     }
     else
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no ciphersuites in common" ) );
-        mbedtls_ssl_send_fatal_handshake_failure( ssl );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
         return( MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN );
     }
 
@@ -1847,6 +1984,28 @@
         mbedtls_ssl_recv_flight_completed( ssl );
 #endif
 
+    /* Debugging-only output for testsuite */
+#if defined(MBEDTLS_DEBUG_C)                         && \
+    defined(MBEDTLS_SSL_PROTO_TLS1_2)                && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+    if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
+    {
+        mbedtls_pk_type_t sig_alg = mbedtls_ssl_get_ciphersuite_sig_alg( ciphersuite_info );
+        if( sig_alg != MBEDTLS_PK_NONE )
+        {
+            mbedtls_md_type_t md_alg = mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs,
+                                                                  sig_alg );
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext: %d",
+                                        mbedtls_ssl_hash_from_md_alg( md_alg ) ) );
+        }
+        else
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "no hash algorithm for signature algorithm "
+                                        "%d - should not happen", sig_alg ) );
+        }
+    }
+#endif
+
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client hello" ) );
 
     return( 0 );
@@ -2452,7 +2611,8 @@
     !defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
 static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
 {
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
 
@@ -2474,7 +2634,8 @@
 static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
 {
     int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
     size_t dn_size, total_dn_size; /* excluding length bytes */
     size_t ct_len, sa_len; /* including length bytes */
     unsigned char *buf, *p;
@@ -2588,35 +2749,40 @@
      * opaque DistinguishedName<1..2^16-1>;
      */
     p += 2;
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-    if( ssl->handshake->sni_ca_chain != NULL )
-        crt = ssl->handshake->sni_ca_chain;
-    else
-#endif
-        crt = ssl->conf->ca_chain;
 
     total_dn_size = 0;
-    while( crt != NULL && crt->version != 0 )
+
+    if( ssl->conf->cert_req_ca_list ==  MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED )
     {
-        dn_size = crt->subject_raw.len;
+#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
+        if( ssl->handshake->sni_ca_chain != NULL )
+            crt = ssl->handshake->sni_ca_chain;
+        else
+#endif
+            crt = ssl->conf->ca_chain;
 
-        if( end < p ||
-            (size_t)( end - p ) < dn_size ||
-            (size_t)( end - p ) < 2 + dn_size )
+        while( crt != NULL && crt->version != 0 )
         {
-            MBEDTLS_SSL_DEBUG_MSG( 1, ( "skipping CAs: buffer too short" ) );
-            break;
+            dn_size = crt->subject_raw.len;
+
+            if( end < p ||
+                (size_t)( end - p ) < dn_size ||
+                (size_t)( end - p ) < 2 + dn_size )
+            {
+                MBEDTLS_SSL_DEBUG_MSG( 1, ( "skipping CAs: buffer too short" ) );
+                break;
+            }
+
+            *p++ = (unsigned char)( dn_size >> 8 );
+            *p++ = (unsigned char)( dn_size      );
+            memcpy( p, crt->subject_raw.p, dn_size );
+            p += dn_size;
+
+            MBEDTLS_SSL_DEBUG_BUF( 3, "requested DN", p - dn_size, dn_size );
+
+            total_dn_size += 2 + dn_size;
+            crt = crt->next;
         }
-
-        *p++ = (unsigned char)( dn_size >> 8 );
-        *p++ = (unsigned char)( dn_size      );
-        memcpy( p, crt->subject_raw.p, dn_size );
-        p += dn_size;
-
-        MBEDTLS_SSL_DEBUG_BUF( 3, "requested DN", p - dn_size, dn_size );
-
-        total_dn_size += 2 + dn_size;
-        crt = crt->next;
     }
 
     ssl->out_msglen  = p - buf;
@@ -2670,74 +2836,81 @@
     const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
                             ssl->transform_negotiate->ciphersuite_info;
 
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) ||                       \
-    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED) ||                       \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) ||                     \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) ||                     \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) ||                   \
-    defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME_PFS__ENABLED)
     unsigned char *p = ssl->out_msg + 4;
+    size_t len;
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
     unsigned char *dig_signed = p;
-    size_t dig_signed_len = 0, len;
-    ((void) dig_signed);
-    ((void) dig_signed_len);
-    ((void) len);
-#endif
+    size_t dig_signed_len = 0;
+#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME_PFS__ENABLED */
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server key exchange" ) );
 
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) ||                           \
-    defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) ||                           \
-    defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
-    {
-        MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write server key exchange" ) );
-        ssl->state++;
-        return( 0 );
-    }
-#endif
+    /*
+     *
+     * Part 1: Extract static ECDH parameters and abort
+     *         if ServerKeyExchange not needed.
+     *
+     */
 
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
+    /* For suites involving ECDH, extract DH parameters
+     * from certificate at this point. */
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED)
+    if( mbedtls_ssl_ciphersuite_uses_ecdh( ciphersuite_info ) )
     {
         ssl_get_ecdh_params_from_cert( ssl );
+    }
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED */
 
+    /* Key exchanges not involving ephemeral keys don't use
+     * ServerKeyExchange, so end here. */
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
+    if( mbedtls_ssl_ciphersuite_no_pfs( ciphersuite_info ) )
+    {
         MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write server key exchange" ) );
         ssl->state++;
         return( 0 );
     }
-#endif
+#endif /* MBEDTLS_KEY_EXCHANGE__NON_PFS__ENABLED */
 
+    /*
+     *
+     * Part 2: Provide key exchange parameters for chosen ciphersuite.
+     *
+     */
+
+    /*
+     * - ECJPAKE key exchanges
+     */
 #if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
     if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
     {
-        size_t jlen;
         const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
 
         ret = mbedtls_ecjpake_write_round_two( &ssl->handshake->ecjpake_ctx,
-                p, end - p, &jlen, ssl->conf->f_rng, ssl->conf->p_rng );
+                p, end - p, &len, ssl->conf->f_rng, ssl->conf->p_rng );
         if( ret != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_write_round_two", ret );
             return( ret );
         }
 
-        p += jlen;
-        n += jlen;
+        p += len;
+        n += len;
     }
 #endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
 
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED) ||                       \
+    /*
+     * For (EC)DHE key exchanges with PSK, parameters are prefixed by support
+     * identity hint (RFC 4279, Sec. 3). Until someone needs this feature,
+     * we use empty support identity hints here.
+     **/
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)   || \
     defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
     if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
         ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
     {
-        /* Note: we don't support identity hints, until someone asks
-         * for them. */
         *(p++) = 0x00;
         *(p++) = 0x00;
 
@@ -2746,10 +2919,11 @@
 #endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED ||
           MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
 
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) ||                       \
-    defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
+    /*
+     * - DHE key exchanges
+     */
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__DHE_ENABLED)
+    if( mbedtls_ssl_ciphersuite_uses_dhe( ciphersuite_info ) )
     {
         if( ssl->conf->dhm_P.p == NULL || ssl->conf->dhm_G.p == NULL )
         {
@@ -2781,8 +2955,10 @@
             return( ret );
         }
 
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)        
         dig_signed = p;
         dig_signed_len = len;
+#endif
 
         p += len;
         n += len;
@@ -2792,13 +2968,13 @@
         MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G  );
         MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->handshake->dhm_ctx.GX );
     }
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
-          MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__DHE_ENABLED */
 
+    /*
+     * - ECDHE key exchanges
+     */
 #if defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDHE_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
+    if( mbedtls_ssl_ciphersuite_uses_ecdhe( ciphersuite_info ) )
     {
         /*
          * Ephemeral ECDH parameters:
@@ -2841,8 +3017,10 @@
             return( ret );
         }
 
-        dig_signed = p;
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
+        dig_signed     = p;
         dig_signed_len = len;
+#endif
 
         p += len;
         n += len;
@@ -2851,29 +3029,44 @@
     }
 #endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDHE_ENABLED */
 
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) ||                       \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) ||                     \
-    defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
-    if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
-        ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
+    /*
+     *
+     * Part 3: For key exchanges involving the server signing the
+     *         exchange parameters, compute and add the signature here.
+     *
+     */
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
+    if( mbedtls_ssl_ciphersuite_uses_server_signature( ciphersuite_info ) )
     {
         size_t signature_len = 0;
         unsigned int hashlen = 0;
         unsigned char hash[64];
-        mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
 
         /*
-         * Choose hash algorithm. NONE means MD5 + SHA1 here.
+         * 3.1: Choose hash algorithm:
+         * A: For TLS 1.2, obey signature-hash-algorithm extension 
+         *    to choose appropriate hash.
+         * B: For SSL3, TLS1.0, TLS1.1 and ECDHE_ECDSA, use SHA1
+         *    (RFC 4492, Sec. 5.4)
+         * C: Otherwise, use MD5 + SHA1 (RFC 4346, Sec. 7.4.3)
          */
+
+        mbedtls_md_type_t md_alg;
+
 #if defined(MBEDTLS_SSL_PROTO_TLS1_2)
+        mbedtls_pk_type_t sig_alg =
+            mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
         if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
         {
-            md_alg = mbedtls_ssl_md_alg_from_hash( ssl->handshake->sig_alg );
-
-            if( md_alg == MBEDTLS_MD_NONE )
+            /* A: For TLS 1.2, obey signature-hash-algorithm extension
+             *    (RFC 5246, Sec. 7.4.1.4.1). */
+            if( sig_alg == MBEDTLS_PK_NONE ||
+                ( md_alg = mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs,
+                                                          sig_alg ) ) == MBEDTLS_MD_NONE )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+                /* (... because we choose a cipher suite 
+                 *      only if there is a matching hash.) */
                 return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
             }
         }
@@ -2881,19 +3074,23 @@
 #endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
 #if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
     defined(MBEDTLS_SSL_PROTO_TLS1_1)
-        if( ciphersuite_info->key_exchange ==
-                  MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
+        if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
         {
+            /* B: Default hash SHA1 */
             md_alg = MBEDTLS_MD_SHA1;
         }
         else
-#endif
+#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
+          MBEDTLS_SSL_PROTO_TLS1_1 */
         {
+            /* C: MD5 + SHA1 */
             md_alg = MBEDTLS_MD_NONE;
         }
 
+        MBEDTLS_SSL_DEBUG_MSG( 3, ( "pick hash algorithm %d for signing", md_alg ) );
+
         /*
-         * Compute the hash to be signed
+         * 3.2: Compute the hash to be signed
          */
 #if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
     defined(MBEDTLS_SSL_PROTO_TLS1_1)
@@ -2918,6 +3115,7 @@
              *     SHA(ClientHello.random + ServerHello.random
              *                            + ServerParams);
              */
+
             mbedtls_md5_starts( &mbedtls_md5 );
             mbedtls_md5_update( &mbedtls_md5, ssl->handshake->randbytes,  64 );
             mbedtls_md5_update( &mbedtls_md5, dig_signed, dig_signed_len );
@@ -2979,7 +3177,7 @@
             (unsigned int) ( mbedtls_md_get_size( mbedtls_md_info_from_type( md_alg ) ) ) );
 
         /*
-         * Make the signature
+         * 3.3: Compute and add the signature
          */
         if( mbedtls_ssl_own_key( ssl ) == NULL )
         {
@@ -2990,16 +3188,31 @@
 #if defined(MBEDTLS_SSL_PROTO_TLS1_2)
         if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
         {
-            *(p++) = ssl->handshake->sig_alg;
-            *(p++) = mbedtls_ssl_sig_from_pk( mbedtls_ssl_own_key( ssl ) );
+            /*
+             * For TLS 1.2, we need to specify signature and hash algorithm
+             * explicitly through a prefix to the signature.
+             *
+             * struct {
+             *    HashAlgorithm hash;
+             *    SignatureAlgorithm signature;
+             * } SignatureAndHashAlgorithm;
+             *
+             * struct {
+             *    SignatureAndHashAlgorithm algorithm;
+             *    opaque signature<0..2^16-1>;
+             * } DigitallySigned;
+             *
+             */
+
+            *(p++) = mbedtls_ssl_hash_from_md_alg( md_alg );
+            *(p++) = mbedtls_ssl_sig_from_pk_alg( sig_alg );
 
             n += 2;
         }
 #endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
 
         if( ( ret = mbedtls_pk_sign( mbedtls_ssl_own_key( ssl ), md_alg, hash, hashlen,
-                        p + 2 , &signature_len,
-                        ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
+                        p + 2 , &signature_len, ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_sign", ret );
             return( ret );
@@ -3013,9 +3226,9 @@
 
         n += signature_len;
     }
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) ||
-          MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
-          MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
+#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
+
+    /* Done with actual work; add header and send. */
 
     ssl->out_msglen  = 4 + n;
     ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
@@ -3257,13 +3470,8 @@
     if( ret == MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY )
     {
         MBEDTLS_SSL_DEBUG_BUF( 3, "Unknown PSK identity", *p, n );
-        if( ( ret = mbedtls_ssl_send_alert_message( ssl,
-                              MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                              MBEDTLS_SSL_ALERT_MSG_UNKNOWN_PSK_IDENTITY ) ) != 0 )
-        {
-            return( ret );
-        }
-
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNKNOWN_PSK_IDENTITY );
         return( MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY );
     }
 
@@ -3531,7 +3739,8 @@
     !defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
 static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
 {
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate verify" ) );
 
@@ -3561,7 +3770,8 @@
     mbedtls_pk_type_t pk_alg;
 #endif
     mbedtls_md_type_t md_alg;
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->transform_negotiate->ciphersuite_info;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate verify" ) );
 
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index d9ab832..208500a 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -3473,7 +3473,6 @@
  */
 static int ssl_parse_record_header( mbedtls_ssl_context *ssl )
 {
-    int ret;
     int major_ver, minor_ver;
 
     MBEDTLS_SSL_DEBUG_BUF( 4, "input record header", ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) );
@@ -3494,14 +3493,8 @@
         ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "unknown record type" ) );
-
-        if( ( ret = mbedtls_ssl_send_alert_message( ssl,
-                        MBEDTLS_SSL_ALERT_LEVEL_FATAL,
-                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE ) ) != 0 )
-        {
-            return( ret );
-        }
-
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_INVALID_RECORD );
     }
 
@@ -4030,6 +4023,7 @@
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> send alert message" ) );
+    MBEDTLS_SSL_DEBUG_MSG( 3, ( "send alert level=%u message=%u", level, message ));
 
     ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
     ssl->out_msglen = 2;
@@ -4041,7 +4035,6 @@
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
         return( ret );
     }
-
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= send alert message" ) );
 
     return( 0 );
@@ -4057,6 +4050,7 @@
     !defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) && \
     !defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED)    && \
     !defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+/* No certificate support -> dummy functions */
 int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
 {
     const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
@@ -4096,7 +4090,10 @@
     MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
     return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
 }
+
 #else
+/* Some certificate support -> implement write and parse */
+
 int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
 {
     int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
@@ -4219,6 +4216,7 @@
     size_t i, n;
     const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
     int authmode = ssl->conf->authmode;
+    uint8_t alert;
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
 
@@ -4258,6 +4256,8 @@
 
     if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
     {
+        /* mbedtls_ssl_read_record may have sent an alert already. We
+           let it decide whether to alert. */
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
         return( ret );
     }
@@ -4279,6 +4279,9 @@
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) );
 
+            /* The client was asked for a certificate but didn't send
+               one. The client should know what's going on, so we
+               don't send an alert. */
             ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
             if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
                 return( 0 );
@@ -4300,6 +4303,9 @@
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) );
 
+            /* The client was asked for a certificate but didn't send
+               one. The client should know what's going on, so we
+               don't send an alert. */
             ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
             if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
                 return( 0 );
@@ -4314,6 +4320,8 @@
     if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
@@ -4321,6 +4329,8 @@
         ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 3 + 3 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
     }
 
@@ -4335,6 +4345,8 @@
         ssl->in_hslen != n + 3 + mbedtls_ssl_hs_hdr_len( ssl ) )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
     }
 
@@ -4350,6 +4362,8 @@
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
                        sizeof( mbedtls_x509_crt ) ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
         return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
     }
 
@@ -4362,6 +4376,8 @@
         if( ssl->in_msg[i] != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
         }
 
@@ -4372,13 +4388,33 @@
         if( n < 128 || i + n > ssl->in_hslen )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
             return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
         }
 
         ret = mbedtls_x509_crt_parse_der( ssl->session_negotiate->peer_cert,
                                   ssl->in_msg + i, n );
-        if( 0 != ret && ( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND ) != ret )
+        switch( ret )
         {
+        case 0: /*ok*/
+        case MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND:
+            /* Ignore certificate with an unknown algorithm: maybe a
+               prior certificate was already trusted. */
+            break;
+
+        case MBEDTLS_ERR_X509_ALLOC_FAILED:
+            alert = MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR;
+            goto crt_parse_der_failed;
+
+        case MBEDTLS_ERR_X509_UNKNOWN_VERSION:
+            alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
+            goto crt_parse_der_failed;
+
+        default:
+            alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
+        crt_parse_der_failed:
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, alert );
             MBEDTLS_SSL_DEBUG_RET( 1, " mbedtls_x509_crt_parse_der", ret );
             return( ret );
         }
@@ -4399,6 +4435,8 @@
         if( ssl->session->peer_cert == NULL )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "new server cert during renegotiation" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
             return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
         }
 
@@ -4409,6 +4447,8 @@
                     ssl->session->peer_cert->raw.len ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "server cert changed during renegotiation" ) );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
             return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
         }
     }
@@ -4432,12 +4472,6 @@
             ca_crl   = ssl->conf->ca_crl;
         }
 
-        if( ca_chain == NULL )
-        {
-            MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
-            return( MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED );
-        }
-
         /*
          * Main check: verify certificate
          */
@@ -4466,6 +4500,8 @@
             if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) &&
                 mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id ) != 0 )
             {
+                ssl->session_negotiate->verify_result |= MBEDTLS_X509_BADCERT_BAD_KEY;
+
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (EC key curve)" ) );
                 if( ret == 0 )
                     ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
@@ -4474,8 +4510,8 @@
 #endif /* MBEDTLS_ECP_C */
 
         if( mbedtls_ssl_check_cert_usage( ssl->session_negotiate->peer_cert,
-                                  ciphersuite_info,
-                                  ! ssl->conf->endpoint,
+                                 ciphersuite_info,
+                                 ! ssl->conf->endpoint,
                                  &ssl->session_negotiate->verify_result ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (usage extensions)" ) );
@@ -4483,8 +4519,67 @@
                 ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
         }
 
-        if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
+        /* mbedtls_x509_crt_verify_with_profile is supposed to report a
+         * verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED,
+         * with details encoded in the verification flags. All other kinds
+         * of error codes, including those from the user provided f_vrfy
+         * functions, are treated as fatal and lead to a failure of
+         * ssl_parse_certificate even if verification was optional. */
+        if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL &&
+            ( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED ||
+              ret == MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ) )
+        {
             ret = 0;
+        }
+
+        if( ca_chain == NULL && authmode == MBEDTLS_SSL_VERIFY_REQUIRED )
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
+            ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED;
+        }
+
+        if( ret != 0 )
+        {
+            /* The certificate may have been rejected for several reasons.
+               Pick one and send the corresponding alert. Which alert to send
+               may be a subject of debate in some cases. */
+            if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER )
+                alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH )
+                alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE )
+                alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE )
+                alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NS_CERT_TYPE )
+                alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK )
+                alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY )
+                alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED )
+                alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED )
+                alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED;
+            else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED )
+                alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA;
+            else
+                alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN;
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            alert );
+        }
+
+#if defined(MBEDTLS_DEBUG_C)
+        if( ssl->session_negotiate->verify_result != 0 )
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "! Certificate verification flags %x",
+                                        ssl->session_negotiate->verify_result ) );
+        }
+        else
+        {
+            MBEDTLS_SSL_DEBUG_MSG( 3, ( "Certificate verification flags clear" ) );
+        }
+#endif /* MBEDTLS_DEBUG_C */
     }
 
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
@@ -4537,12 +4632,16 @@
     if( ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
     if( ssl->in_msglen != 1 || ssl->in_msg[0] != 1 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC );
     }
 
@@ -4565,6 +4664,8 @@
         if( ++ssl->in_epoch == 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
+            /* This is highly unlikely to happen for legitimate reasons, so
+               treat it as an attack and don't send an alert. */
             return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
         }
     }
@@ -4589,6 +4690,8 @@
         if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_INBOUND ) ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
+            mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                            MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
             return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
         }
     }
@@ -5167,6 +5270,8 @@
     if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
         return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
     }
 
@@ -5182,6 +5287,8 @@
         ssl->in_hslen  != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
     }
 
@@ -5189,6 +5296,8 @@
                       buf, hash_len ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
+        mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                        MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
         return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
     }
 
@@ -5244,7 +5353,11 @@
 #endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
 
     handshake->update_checksum = ssl_update_checksum_start;
-    handshake->sig_alg = MBEDTLS_SSL_HASH_SHA1;
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+    mbedtls_ssl_sig_hash_set_init( &handshake->hash_algs );
+#endif
 
 #if defined(MBEDTLS_DHM_C)
     mbedtls_dhm_init( &handshake->dhm_ctx );
@@ -6050,6 +6163,14 @@
 }
 #endif
 
+#if defined(MBEDTLS_SSL_SRV_C)
+void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
+                                          char cert_req_ca_list )
+{
+    conf->cert_req_ca_list = cert_req_ca_list;
+}
+#endif
+
 #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
 void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm )
 {
@@ -6639,11 +6760,11 @@
 #if defined(MBEDTLS_SSL_PROTO_SSL3)
                 if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
                 {
-                    /*
-                     * SSLv3 does not have a "no_renegotiation" alert
-                     */
-                    if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
-                        return( ret );
+                    /* SSLv3 does not have a "no_renegotiation" warning, so
+                       we send a fatal alert and abort the connection. */
+                    mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+                                                    MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
+                    return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
                 }
                 else
 #endif /* MBEDTLS_SSL_PROTO_SSL3 */
@@ -7150,7 +7271,7 @@
     MBEDTLS_MD_SHA256,
     MBEDTLS_MD_SHA224,
 #endif
-#if defined(MBEDTLS_SHA1_C)
+#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE)
     MBEDTLS_MD_SHA1,
 #endif
     MBEDTLS_MD_NONE
@@ -7232,6 +7353,10 @@
     conf->anti_replay = MBEDTLS_SSL_ANTI_REPLAY_ENABLED;
 #endif
 
+#if defined(MBEDTLS_SSL_SRV_C)
+    conf->cert_req_ca_list = MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED;
+#endif
+
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
     conf->hs_timeout_min = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN;
     conf->hs_timeout_max = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX;
@@ -7375,6 +7500,19 @@
     return( MBEDTLS_SSL_SIG_ANON );
 }
 
+unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type )
+{
+    switch( type ) {
+        case MBEDTLS_PK_RSA:
+            return( MBEDTLS_SSL_SIG_RSA );
+        case MBEDTLS_PK_ECDSA:
+        case MBEDTLS_PK_ECKEY:
+            return( MBEDTLS_SSL_SIG_ECDSA );
+        default:
+            return( MBEDTLS_SSL_SIG_ANON );
+    }
+}
+
 mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig )
 {
     switch( sig )
@@ -7393,6 +7531,57 @@
 }
 #endif /* MBEDTLS_PK_C && ( MBEDTLS_RSA_C || MBEDTLS_ECDSA_C ) */
 
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+    defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+
+/* Find an entry in a signature-hash set matching a given hash algorithm. */
+mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
+                                                 mbedtls_pk_type_t sig_alg )
+{
+    switch( sig_alg )
+    {
+        case MBEDTLS_PK_RSA:
+            return( set->rsa );
+        case MBEDTLS_PK_ECDSA:
+            return( set->ecdsa );
+        default:
+            return( MBEDTLS_MD_NONE );
+    }
+}
+
+/* Add a signature-hash-pair to a signature-hash set */
+void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
+                                   mbedtls_pk_type_t sig_alg,
+                                   mbedtls_md_type_t md_alg )
+{
+    switch( sig_alg )
+    {
+        case MBEDTLS_PK_RSA:
+            if( set->rsa == MBEDTLS_MD_NONE )
+                set->rsa = md_alg;
+            break;
+
+        case MBEDTLS_PK_ECDSA:
+            if( set->ecdsa == MBEDTLS_MD_NONE )
+                set->ecdsa = md_alg;
+            break;
+
+        default:
+            break;
+    }
+}
+
+/* Allow exactly one hash algorithm for each signature. */
+void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
+                                          mbedtls_md_type_t md_alg )
+{
+    set->rsa   = md_alg;
+    set->ecdsa = md_alg;
+}
+
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2) &&
+          MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
 /*
  * Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX
  */
diff --git a/library/threading.c b/library/threading.c
index 83ec01a..55091e8 100644
--- a/library/threading.c
+++ b/library/threading.c
@@ -32,7 +32,7 @@
 #if defined(MBEDTLS_THREADING_PTHREAD)
 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
 {
-    if( mutex == NULL || mutex->is_valid )
+    if( mutex == NULL )
         return;
 
     mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
@@ -113,6 +113,9 @@
 
     mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
     mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+    mbedtls_mutex_init( &mbedtls_threading_ecp_mutex );
+#endif
 }
 
 /*
@@ -122,6 +125,9 @@
 {
     mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
     mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+    mbedtls_mutex_free( &mbedtls_threading_ecp_mutex );
+#endif
 }
 #endif /* MBEDTLS_THREADING_ALT */
 
@@ -133,5 +139,8 @@
 #endif
 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+mbedtls_threading_mutex_t mbedtls_threading_ecp_mutex MUTEX_INIT;
+#endif
 
 #endif /* MBEDTLS_THREADING_C */
diff --git a/library/version_features.c b/library/version_features.c
index e866e67..9f97c7b 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -117,6 +117,9 @@
 #if defined(MBEDTLS_SHA512_ALT)
     "MBEDTLS_SHA512_ALT",
 #endif /* MBEDTLS_SHA512_ALT */
+#if defined(MBEDTLS_ECP_ALT)
+    "MBEDTLS_ECP_ALT",
+#endif /* MBEDTLS_ECP_ALT */
 #if defined(MBEDTLS_MD2_PROCESS_ALT)
     "MBEDTLS_MD2_PROCESS_ALT",
 #endif /* MBEDTLS_MD2_PROCESS_ALT */
@@ -159,6 +162,33 @@
 #if defined(MBEDTLS_AES_DECRYPT_ALT)
     "MBEDTLS_AES_DECRYPT_ALT",
 #endif /* MBEDTLS_AES_DECRYPT_ALT */
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+    "MBEDTLS_ECP_INTERNAL_ALT",
+#endif /* MBEDTLS_ECP_INTERNAL_ALT */
+#if defined(MBEDTLS_ECP_RANDOMIZE_JAC_ALT)
+    "MBEDTLS_ECP_RANDOMIZE_JAC_ALT",
+#endif /* MBEDTLS_ECP_RANDOMIZE_JAC_ALT */
+#if defined(MBEDTLS_ECP_ADD_MIXED_ALT)
+    "MBEDTLS_ECP_ADD_MIXED_ALT",
+#endif /* MBEDTLS_ECP_ADD_MIXED_ALT */
+#if defined(MBEDTLS_ECP_DOUBLE_JAC_ALT)
+    "MBEDTLS_ECP_DOUBLE_JAC_ALT",
+#endif /* MBEDTLS_ECP_DOUBLE_JAC_ALT */
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT)
+    "MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT",
+#endif /* MBEDTLS_ECP_NORMALIZE_JAC_MANY_ALT */
+#if defined(MBEDTLS_ECP_NORMALIZE_JAC_ALT)
+    "MBEDTLS_ECP_NORMALIZE_JAC_ALT",
+#endif /* MBEDTLS_ECP_NORMALIZE_JAC_ALT */
+#if defined(MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT)
+    "MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT",
+#endif /* MBEDTLS_ECP_DOUBLE_ADD_MXZ_ALT */
+#if defined(MBEDTLS_ECP_RANDOMIZE_MXZ_ALT)
+    "MBEDTLS_ECP_RANDOMIZE_MXZ_ALT",
+#endif /* MBEDTLS_ECP_RANDOMIZE_MXZ_ALT */
+#if defined(MBEDTLS_ECP_NORMALIZE_MXZ_ALT)
+    "MBEDTLS_ECP_NORMALIZE_MXZ_ALT",
+#endif /* MBEDTLS_ECP_NORMALIZE_MXZ_ALT */
 #if defined(MBEDTLS_TEST_NULL_ENTROPY)
     "MBEDTLS_TEST_NULL_ENTROPY",
 #endif /* MBEDTLS_TEST_NULL_ENTROPY */
diff --git a/library/x509.c b/library/x509.c
index e438770..88e32b0 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -1035,7 +1035,7 @@
  */
 int mbedtls_x509_self_test( int verbose )
 {
-#if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_SHA1_C)
+#if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_SHA256_C)
     int ret;
     uint32_t flags;
     mbedtls_x509_crt cacert;
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 234f145..d86857d 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -85,9 +85,11 @@
  */
 const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default =
 {
-    /* Hashes from SHA-1 and above */
+#if defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES)
+    /* Allow SHA-1 (weak, but still safe in controlled environments) */
     MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
-    MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_RIPEMD160 ) |
+#endif
+    /* Only SHA-2 hashes */
     MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 ) |
     MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
     MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
diff --git a/programs/pkey/ecdsa.c b/programs/pkey/ecdsa.c
index 069d312..c3ce56a 100644
--- a/programs/pkey/ecdsa.c
+++ b/programs/pkey/ecdsa.c
@@ -37,6 +37,7 @@
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
 #include "mbedtls/ecdsa.h"
+#include "mbedtls/sha256.h"
 
 #include <string.h>
 #endif
@@ -101,8 +102,10 @@
     mbedtls_ecdsa_context ctx_sign, ctx_verify;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
-    unsigned char hash[] = "This should be the hash of a message.";
-    unsigned char sig[512];
+    mbedtls_sha256_context sha256_ctx;
+    unsigned char message[100];
+    unsigned char hash[32];
+    unsigned char sig[MBEDTLS_ECDSA_MAX_LEN];
     size_t sig_len;
     const char *pers = "ecdsa";
     ((void) argv);
@@ -110,8 +113,10 @@
     mbedtls_ecdsa_init( &ctx_sign );
     mbedtls_ecdsa_init( &ctx_verify );
     mbedtls_ctr_drbg_init( &ctr_drbg );
+    mbedtls_sha256_init( &sha256_ctx );
 
-    memset(sig, 0, sizeof( sig ) );
+    memset( sig, 0, sizeof( sig ) );
+    memset( message, 0x25, sizeof( message ) );
     ret = 1;
 
     if( argc != 1 )
@@ -155,9 +160,23 @@
     dump_pubkey( "  + Public key: ", &ctx_sign );
 
     /*
-     * Sign some message hash
+     * Compute message hash
      */
-    mbedtls_printf( "  . Signing message..." );
+    mbedtls_printf( "  . Computing message hash..." );
+    fflush( stdout );
+
+    mbedtls_sha256_starts( &sha256_ctx, 0 );
+    mbedtls_sha256_update( &sha256_ctx, message, sizeof( message ) );
+    mbedtls_sha256_finish( &sha256_ctx, hash );
+
+    mbedtls_printf( " ok\n" );
+
+    dump_buf( "  + Hash: ", hash, sizeof( hash ) );
+
+    /*
+     * Sign message hash
+     */
+    mbedtls_printf( "  . Signing message hash..." );
     fflush( stdout );
 
     if( ( ret = mbedtls_ecdsa_write_signature( &ctx_sign, MBEDTLS_MD_SHA256,
@@ -170,7 +189,6 @@
     }
     mbedtls_printf( " ok (signature length = %u)\n", (unsigned int) sig_len );
 
-    dump_buf( "  + Hash: ", hash, sizeof hash );
     dump_buf( "  + Signature: ", sig, sig_len );
 
     /*
@@ -224,6 +242,7 @@
     mbedtls_ecdsa_free( &ctx_sign );
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
+    mbedtls_sha256_free( &sha256_ctx );
 
     return( ret );
 }
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index a1d71e1..9a75c7f 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -87,6 +87,7 @@
 #define DFL_MIN_VERSION         -1
 #define DFL_MAX_VERSION         -1
 #define DFL_ARC4                -1
+#define DFL_SHA1                -1
 #define DFL_AUTH_MODE           -1
 #define DFL_MFL_CODE            MBEDTLS_SSL_MAX_FRAG_LEN_NONE
 #define DFL_TRUNC_HMAC          -1
@@ -97,6 +98,7 @@
 #define DFL_RECONNECT_HARD      0
 #define DFL_TICKETS             MBEDTLS_SSL_SESSION_TICKETS_ENABLED
 #define DFL_ALPN_STRING         NULL
+#define DFL_CURVES              NULL
 #define DFL_TRANSPORT           MBEDTLS_SSL_TRANSPORT_STREAM
 #define DFL_HS_TO_MIN           0
 #define DFL_HS_TO_MAX           0
@@ -177,6 +179,17 @@
 #define USAGE_ALPN ""
 #endif /* MBEDTLS_SSL_ALPN */
 
+#if defined(MBEDTLS_ECP_C)
+#define USAGE_CURVES \
+    "    curves=a,b,c,d      default: \"default\" (library default)\n"  \
+    "                        example: \"secp521r1,brainpoolP512r1\"\n"  \
+    "                        - use \"none\" for empty list\n"           \
+    "                        - see mbedtls_ecp_curve_list()\n"          \
+    "                          for acceptable curve names\n"
+#else
+#define USAGE_CURVES ""
+#endif
+
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
 #define USAGE_DTLS \
     "    dtls=%%d             default: 0 (TLS)\n"                           \
@@ -259,10 +272,12 @@
     USAGE_FALLBACK                                          \
     USAGE_EMS                                               \
     USAGE_ETM                                               \
+    USAGE_CURVES                                            \
     USAGE_RECSPLIT                                          \
     USAGE_DHMLEN                                            \
     "\n"                                                    \
     "    arc4=%%d             default: (library default: 0)\n" \
+    "    allow_sha1=%%d       default: 0\n"                             \
     "    min_version=%%s      default: (library default: tls1)\n"       \
     "    max_version=%%s      default: (library default: tls1_2)\n"     \
     "    force_version=%%s    default: \"\" (none)\n"       \
@@ -301,6 +316,7 @@
     int min_version;            /* minimum protocol version accepted        */
     int max_version;            /* maximum protocol version accepted        */
     int arc4;                   /* flag for arc4 suites support             */
+    int allow_sha1;             /* flag for SHA-1 support                   */
     int auth_mode;              /* verify mode for connection               */
     unsigned char mfl_code;     /* code for maximum fragment length         */
     int trunc_hmac;             /* negotiate truncated hmac or not          */
@@ -310,6 +326,7 @@
     int reco_delay;             /* delay in seconds before resuming session */
     int reconnect_hard;         /* unexpectedly reconnect from the same port */
     int tickets;                /* enable / disable session tickets         */
+    const char *curves;         /* list of supported elliptic curves        */
     const char *alpn_string;    /* ALPN supported protocols                 */
     int transport;              /* TLS or DTLS?                             */
     uint32_t hs_to_min;         /* Initial value of DTLS handshake timer    */
@@ -395,6 +412,22 @@
 
     return( 0 );
 }
+
+static int ssl_sig_hashes_for_test[] = {
+#if defined(MBEDTLS_SHA512_C)
+    MBEDTLS_MD_SHA512,
+    MBEDTLS_MD_SHA384,
+#endif
+#if defined(MBEDTLS_SHA256_C)
+    MBEDTLS_MD_SHA256,
+    MBEDTLS_MD_SHA224,
+#endif
+#if defined(MBEDTLS_SHA1_C)
+    /* Allow SHA-1 as we use it extensively in tests. */
+    MBEDTLS_MD_SHA1,
+#endif
+    MBEDTLS_MD_NONE
+};
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
 int main( int argc, char *argv[] )
@@ -409,8 +442,16 @@
 #if defined(MBEDTLS_SSL_ALPN)
     const char *alpn_list[10];
 #endif
+#if defined(MBEDTLS_ECP_C)
+    mbedtls_ecp_group_id curve_list[20];
+    const mbedtls_ecp_curve_info *curve_cur;
+#endif
+
     const char *pers = "ssl_client2";
 
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+    mbedtls_x509_crt_profile crt_profile_for_test = mbedtls_x509_crt_profile_default;
+#endif
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
     mbedtls_ssl_context ssl;
@@ -491,6 +532,7 @@
     opt.min_version         = DFL_MIN_VERSION;
     opt.max_version         = DFL_MAX_VERSION;
     opt.arc4                = DFL_ARC4;
+    opt.allow_sha1          = DFL_SHA1;
     opt.auth_mode           = DFL_AUTH_MODE;
     opt.mfl_code            = DFL_MFL_CODE;
     opt.trunc_hmac          = DFL_TRUNC_HMAC;
@@ -501,6 +543,7 @@
     opt.reconnect_hard      = DFL_RECONNECT_HARD;
     opt.tickets             = DFL_TICKETS;
     opt.alpn_string         = DFL_ALPN_STRING;
+    opt.curves              = DFL_CURVES;
     opt.transport           = DFL_TRANSPORT;
     opt.hs_to_min           = DFL_HS_TO_MIN;
     opt.hs_to_max           = DFL_HS_TO_MAX;
@@ -657,6 +700,8 @@
                 default: goto usage;
             }
         }
+        else if( strcmp( p, "curves" ) == 0 )
+            opt.curves = q;
         else if( strcmp( p, "etm" ) == 0 )
         {
             switch( atoi( q ) )
@@ -705,6 +750,15 @@
                 default:    goto usage;
             }
         }
+        else if( strcmp( p, "allow_sha1" ) == 0 )
+        {
+            switch( atoi( q ) )
+            {
+                case 0:     opt.allow_sha1 = 0;   break;
+                case 1:     opt.allow_sha1 = 1;    break;
+                default:    goto usage;
+            }
+        }
         else if( strcmp( p, "force_version" ) == 0 )
         {
             if( strcmp( q, "ssl3" ) == 0 )
@@ -905,6 +959,64 @@
     }
 #endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
 
+#if defined(MBEDTLS_ECP_C)
+    if( opt.curves != NULL )
+    {
+        p = (char *) opt.curves;
+        i = 0;
+
+        if( strcmp( p, "none" ) == 0 )
+        {
+            curve_list[0] = MBEDTLS_ECP_DP_NONE;
+        }
+        else if( strcmp( p, "default" ) != 0 )
+        {
+            /* Leave room for a final NULL in curve list */
+            while( i < (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
+                   && *p != '\0' )
+            {
+                q = p;
+
+                /* Terminate the current string */
+                while( *p != ',' && *p != '\0' )
+                    p++;
+                if( *p == ',' )
+                    *p++ = '\0';
+
+                if( ( curve_cur = mbedtls_ecp_curve_info_from_name( q ) ) != NULL )
+                {
+                    curve_list[i++] = curve_cur->grp_id;
+                }
+                else
+                {
+                    mbedtls_printf( "unknown curve %s\n", q );
+                    mbedtls_printf( "supported curves: " );
+                    for( curve_cur = mbedtls_ecp_curve_list();
+                         curve_cur->grp_id != MBEDTLS_ECP_DP_NONE;
+                         curve_cur++ )
+                    {
+                        mbedtls_printf( "%s ", curve_cur->name );
+                    }
+                    mbedtls_printf( "\n" );
+                    goto exit;
+                }
+            }
+
+            mbedtls_printf("Number of curves: %d\n", i );
+
+            if( i == (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
+                && *p != '\0' )
+            {
+                mbedtls_printf( "curves list too long, maximum %zu",
+                                (size_t) ( sizeof( curve_list ) / sizeof( *curve_list ) - 1 ) );
+                goto exit;
+            }
+
+            curve_list[i] = MBEDTLS_ECP_DP_NONE;
+        }
+    }
+#endif /* MBEDTLS_ECP_C */
+
 #if defined(MBEDTLS_SSL_ALPN)
     if( opt.alpn_string != NULL )
     {
@@ -1089,9 +1201,18 @@
     }
 
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
+    /* The default algorithms profile disables SHA-1, but our tests still
+       rely on it heavily. */
+    if( opt.allow_sha1 > 0 )
+    {
+        crt_profile_for_test.allowed_mds |= MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 );
+        mbedtls_ssl_conf_cert_profile( &conf, &crt_profile_for_test );
+        mbedtls_ssl_conf_sig_hashes( &conf, ssl_sig_hashes_for_test );
+    }
+
     if( opt.debug_level > 0 )
         mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
-#endif
+#endif /* MBEDTLS_X509_CRT_PARSE_C */
 
     if( opt.auth_mode != DFL_AUTH_MODE )
         mbedtls_ssl_conf_authmode( &conf, opt.auth_mode );
@@ -1185,6 +1306,14 @@
     }
 #endif
 
+#if defined(MBEDTLS_ECP_C)
+    if( opt.curves != NULL &&
+        strcmp( opt.curves, "default" ) != 0 )
+    {
+        mbedtls_ssl_conf_curves( &conf, curve_list );
+    }
+#endif
+
 #if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
     if( ( ret = mbedtls_ssl_conf_psk( &conf, psk, psk_len,
                              (const unsigned char *) opt.psk_identity,
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 96bd35f..cbc654e 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -123,7 +123,9 @@
 #define DFL_MIN_VERSION         -1
 #define DFL_MAX_VERSION         -1
 #define DFL_ARC4                -1
+#define DFL_SHA1                -1
 #define DFL_AUTH_MODE           -1
+#define DFL_CERT_REQ_CA_LIST    MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED
 #define DFL_MFL_CODE            MBEDTLS_SSL_MAX_FRAG_LEN_NONE
 #define DFL_TRUNC_HMAC          -1
 #define DFL_TICKETS             MBEDTLS_SSL_SESSION_TICKETS_ENABLED
@@ -132,6 +134,7 @@
 #define DFL_CACHE_TIMEOUT       -1
 #define DFL_SNI                 NULL
 #define DFL_ALPN_STRING         NULL
+#define DFL_CURVES              NULL
 #define DFL_DHM_FILE            NULL
 #define DFL_TRANSPORT           MBEDTLS_SSL_TRANSPORT_STREAM
 #define DFL_COOKIES             1
@@ -309,6 +312,17 @@
 #define USAGE_ECJPAKE ""
 #endif
 
+#if defined(MBEDTLS_ECP_C)
+#define USAGE_CURVES \
+    "    curves=a,b,c,d      default: \"default\" (library default)\n"  \
+    "                        example: \"secp521r1,brainpoolP512r1\"\n"  \
+    "                        - use \"none\" for empty list\n"           \
+    "                        - see mbedtls_ecp_curve_list()\n"          \
+    "                          for acceptable curve names\n"
+#else
+#define USAGE_CURVES ""
+#endif
+
 #define USAGE \
     "\n usage: ssl_server2 param=<>...\n"                   \
     "\n acceptable parameters:\n"                           \
@@ -326,6 +340,8 @@
     "\n"                                                    \
     "    auth_mode=%%s        default: (library default: none)\n"      \
     "                        options: none, optional, required\n" \
+    "    cert_req_ca_list=%%d default: 1 (send ca list)\n"  \
+    "                        options: 1 (send ca list), 0 (don't send)\n" \
     USAGE_IO                                                \
     USAGE_SNI                                               \
     "\n"                                                    \
@@ -343,8 +359,10 @@
     USAGE_ALPN                                              \
     USAGE_EMS                                               \
     USAGE_ETM                                               \
+    USAGE_CURVES                                            \
     "\n"                                                    \
     "    arc4=%%d             default: (library default: 0)\n" \
+    "    allow_sha1=%%d       default: 0\n"                             \
     "    min_version=%%s      default: (library default: tls1)\n"       \
     "    max_version=%%s      default: (library default: tls1_2)\n"     \
     "    force_version=%%s    default: \"\" (none)\n"       \
@@ -400,7 +418,9 @@
     int min_version;            /* minimum protocol version accepted        */
     int max_version;            /* maximum protocol version accepted        */
     int arc4;                   /* flag for arc4 suites support             */
+    int allow_sha1;             /* flag for SHA-1 support                   */
     int auth_mode;              /* verify mode for connection               */
+    int cert_req_ca_list;       /* should we send the CA list?              */
     unsigned char mfl_code;     /* code for maximum fragment length         */
     int trunc_hmac;             /* accept truncated hmac?                   */
     int tickets;                /* enable / disable session tickets         */
@@ -408,6 +428,7 @@
     int cache_max;              /* max number of session cache entries      */
     int cache_timeout;          /* expiration delay of session cache entries */
     char *sni;                  /* string describing sni information        */
+    const char *curves;         /* list of supported elliptic curves        */
     const char *alpn_string;    /* ALPN supported protocols                 */
     const char *dhm_file;       /* the file with the DH parameters          */
     int extended_ms;            /* allow negotiation of extended MS?        */
@@ -795,6 +816,24 @@
 }
 #endif
 
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+static int ssl_sig_hashes_for_test[] = {
+#if defined(MBEDTLS_SHA512_C)
+    MBEDTLS_MD_SHA512,
+    MBEDTLS_MD_SHA384,
+#endif
+#if defined(MBEDTLS_SHA256_C)
+    MBEDTLS_MD_SHA256,
+    MBEDTLS_MD_SHA224,
+#endif
+#if defined(MBEDTLS_SHA1_C)
+    /* Allow SHA-1 as we use it extensively in tests. */
+    MBEDTLS_MD_SHA1,
+#endif
+    MBEDTLS_MD_NONE
+};
+#endif /* MBEDTLS_X509_CRT_PARSE_C */
+
 int main( int argc, char *argv[] )
 {
     int ret = 0, len, written, frags, exchanges_left;
@@ -812,6 +851,9 @@
     mbedtls_ssl_cookie_ctx cookie_ctx;
 #endif
 
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+    mbedtls_x509_crt_profile crt_profile_for_test = mbedtls_x509_crt_profile_default;
+#endif
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
     mbedtls_ssl_context ssl;
@@ -843,6 +885,10 @@
 #if defined(SNI_OPTION)
     sni_entry *sni_info = NULL;
 #endif
+#if defined(MBEDTLS_ECP_C)
+    mbedtls_ecp_group_id     curve_list[20];
+    const mbedtls_ecp_curve_info * curve_cur;
+#endif
 #if defined(MBEDTLS_SSL_ALPN)
     const char *alpn_list[10];
 #endif
@@ -943,7 +989,9 @@
     opt.min_version         = DFL_MIN_VERSION;
     opt.max_version         = DFL_MAX_VERSION;
     opt.arc4                = DFL_ARC4;
+    opt.allow_sha1          = DFL_SHA1;
     opt.auth_mode           = DFL_AUTH_MODE;
+    opt.cert_req_ca_list    = DFL_CERT_REQ_CA_LIST;
     opt.mfl_code            = DFL_MFL_CODE;
     opt.trunc_hmac          = DFL_TRUNC_HMAC;
     opt.tickets             = DFL_TICKETS;
@@ -952,6 +1000,7 @@
     opt.cache_timeout       = DFL_CACHE_TIMEOUT;
     opt.sni                 = DFL_SNI;
     opt.alpn_string         = DFL_ALPN_STRING;
+    opt.curves              = DFL_CURVES;
     opt.dhm_file            = DFL_DHM_FILE;
     opt.transport           = DFL_TRANSPORT;
     opt.cookies             = DFL_COOKIES;
@@ -1030,6 +1079,8 @@
             }
             opt.force_ciphersuite[1] = 0;
         }
+        else if( strcmp( p, "curves" ) == 0 )
+            opt.curves = q;
         else if( strcmp( p, "version_suites" ) == 0 )
             opt.version_suites = q;
         else if( strcmp( p, "renegotiation" ) == 0 )
@@ -1113,6 +1164,15 @@
                 default:    goto usage;
             }
         }
+        else if( strcmp( p, "allow_sha1" ) == 0 )
+        {
+            switch( atoi( q ) )
+            {
+                case 0:     opt.allow_sha1 = 0;   break;
+                case 1:     opt.allow_sha1 = 1;    break;
+                default:    goto usage;
+            }
+        }
         else if( strcmp( p, "force_version" ) == 0 )
         {
             if( strcmp( q, "ssl3" ) == 0 )
@@ -1155,6 +1215,12 @@
             if( ( opt.auth_mode = get_auth_mode( q ) ) < 0 )
                 goto usage;
         }
+        else if( strcmp( p, "cert_req_ca_list" ) == 0 )
+        {
+            opt.cert_req_ca_list = atoi( q );
+            if( opt.cert_req_ca_list < 0 || opt.cert_req_ca_list > 1 )
+                goto usage;
+        }
         else if( strcmp( p, "max_frag_len" ) == 0 )
         {
             if( strcmp( q, "512" ) == 0 )
@@ -1374,6 +1440,64 @@
     }
 #endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
 
+#if defined(MBEDTLS_ECP_C)
+    if( opt.curves != NULL )
+    {
+        p = (char *) opt.curves;
+        i = 0;
+
+        if( strcmp( p, "none" ) == 0 )
+        {
+            curve_list[0] = MBEDTLS_ECP_DP_NONE;
+        }
+        else if( strcmp( p, "default" ) != 0 )
+        {
+            /* Leave room for a final NULL in curve list */
+            while( i < (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
+                   && *p != '\0' )
+            {
+                q = p;
+
+                /* Terminate the current string */
+                while( *p != ',' && *p != '\0' )
+                    p++;
+                if( *p == ',' )
+                    *p++ = '\0';
+
+                if( ( curve_cur = mbedtls_ecp_curve_info_from_name( q ) ) != NULL )
+                {
+                    curve_list[i++] = curve_cur->grp_id;
+                }
+                else
+                {
+                    mbedtls_printf( "unknown curve %s\n", q );
+                    mbedtls_printf( "supported curves: " );
+                    for( curve_cur = mbedtls_ecp_curve_list();
+                         curve_cur->grp_id != MBEDTLS_ECP_DP_NONE;
+                         curve_cur++ )
+                    {
+                        mbedtls_printf( "%s ", curve_cur->name );
+                    }
+                    mbedtls_printf( "\n" );
+                    goto exit;
+                }
+            }
+
+            mbedtls_printf("Number of curves: %d\n", i );
+
+            if( i == (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
+                && *p != '\0' )
+            {
+                mbedtls_printf( "curves list too long, maximum %zu",
+                                (size_t) ( sizeof( curve_list ) / sizeof( *curve_list ) - 1 ) );
+                goto exit;
+            }
+
+            curve_list[i] = MBEDTLS_ECP_DP_NONE;
+        }
+    }
+#endif /* MBEDTLS_ECP_C */
+
 #if defined(MBEDTLS_SSL_ALPN)
     if( opt.alpn_string != NULL )
     {
@@ -1631,9 +1755,24 @@
         goto exit;
     }
 
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+    /* The default algorithms profile disables SHA-1, but our tests still
+       rely on it heavily. Hence we allow it here. A real-world server
+       should use the default profile unless there is a good reason not to. */
+    if( opt.allow_sha1 > 0 )
+    {
+        crt_profile_for_test.allowed_mds |= MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 );
+        mbedtls_ssl_conf_cert_profile( &conf, &crt_profile_for_test );
+        mbedtls_ssl_conf_sig_hashes( &conf, ssl_sig_hashes_for_test );
+    }
+#endif /* MBEDTLS_X509_CRT_PARSE_C */
+
     if( opt.auth_mode != DFL_AUTH_MODE )
         mbedtls_ssl_conf_authmode( &conf, opt.auth_mode );
 
+    if( opt.cert_req_ca_list != DFL_CERT_REQ_CA_LIST )
+        mbedtls_ssl_conf_cert_req_ca_list( &conf, opt.cert_req_ca_list );
+
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
     if( opt.hs_to_min != DFL_HS_TO_MIN || opt.hs_to_max != DFL_HS_TO_MAX )
         mbedtls_ssl_conf_handshake_timeout( &conf, opt.hs_to_min, opt.hs_to_max );
@@ -1810,6 +1949,14 @@
         mbedtls_ssl_conf_sni( &conf, sni_callback, sni_info );
 #endif
 
+#if defined(MBEDTLS_ECP_C)
+    if( opt.curves != NULL &&
+        strcmp( opt.curves, "default" ) != 0 )
+    {
+        mbedtls_ssl_conf_curves( &conf, curve_list );
+    }
+#endif
+
 #if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
     if( strlen( opt.psk ) != 0 && strlen( opt.psk_identity ) != 0 )
     {
diff --git a/tests/compat.sh b/tests/compat.sh
index aa81242..c5074cb 100755
--- a/tests/compat.sh
+++ b/tests/compat.sh
@@ -824,6 +824,11 @@
             else
                 M_CLIENT_ARGS="$M_CLIENT_ARGS crt_file=none key_file=none"
             fi
+
+            # Allow SHA-1. It's disabled by default for security reasons but
+            # our tests still use certificates signed with it.
+            M_SERVER_ARGS="$M_SERVER_ARGS allow_sha1=1"
+            M_CLIENT_ARGS="$M_CLIENT_ARGS allow_sha1=1"
             ;;
 
         "PSK")
@@ -836,6 +841,11 @@
             M_CLIENT_ARGS="$M_CLIENT_ARGS psk=6162636465666768696a6b6c6d6e6f70 crt_file=none key_file=none"
             O_CLIENT_ARGS="$O_CLIENT_ARGS -psk 6162636465666768696a6b6c6d6e6f70"
             G_CLIENT_ARGS="$G_CLIENT_ARGS --pskusername Client_identity --pskkey=6162636465666768696a6b6c6d6e6f70"
+
+            # Allow SHA-1. It's disabled by default for security reasons but
+            # our tests still use certificates signed with it.
+            M_SERVER_ARGS="$M_SERVER_ARGS allow_sha1=1"
+            M_CLIENT_ARGS="$M_CLIENT_ARGS allow_sha1=1"
             ;;
     esac
 }
diff --git a/tests/data_files/.gitignore b/tests/data_files/.gitignore
new file mode 100644
index 0000000..d16c04c
--- /dev/null
+++ b/tests/data_files/.gitignore
@@ -0,0 +1,3 @@
+cli-rsa.csr
+server2-rsa.csr
+test-ca.csr
diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
new file mode 100644
index 0000000..f7826d4
--- /dev/null
+++ b/tests/data_files/Makefile
@@ -0,0 +1,94 @@
+## This file contains a record of how some of the test data was
+## generated. The final build products are committed to the repository
+## as well to make sure that the test data is identical. You do not
+## need to use this makefile unless you're extending mbed TLS's tests.
+
+## Many data files were generated prior to the existence of this
+## makefile, so the method of their generation was not recorded.
+
+## Note that in addition to depending on the version of the data
+## generation tool, many of the build outputs are randomized, so
+## running this makefile twice would not produce the same results.
+
+## Tools
+OPENSSL ?= openssl
+
+## Build the generated test data. Note that since the final outputs
+## are committed to the repository, this target should do nothing on a
+## fresh checkout. Furthermore, since the generation is randomized,
+## re-running the same targets may result in differing files. The goal
+## of this makefile is primarily to serve as a record of how the
+## targets were generated in the first place.
+default: all_final
+
+all_intermediate := # temporary files
+all_final := # files used by tests
+
+
+
+################################################################
+#### Generate certificates from existing keys
+################################################################
+
+test_ca_key_file_rsa = test-ca.key
+test_ca_pwd_rsa = PolarSSLTest
+test_ca_config_file = test-ca.opensslconf
+
+test-ca.csr: $(test_ca_key_file_rsa) $(test_ca_config_file)
+	$(OPENSSL) req -new -config $(test_ca_config_file) -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -subj "/C=NL/O=PolarSSL/CN=PolarSSL Test CA" -out $@
+all_intermediate += test-ca.csr
+test-ca-sha1.crt: $(test_ca_key_file_rsa) $(test_ca_config_file) test-ca.csr
+	$(OPENSSL) req -x509 -config $(test_ca_config_file) -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 0 -days 3653 -sha1 -in test-ca.csr -out $@
+all_final += test-ca-sha1.crt
+test-ca-sha256.crt: $(test_ca_key_file_rsa) $(test_ca_config_file) test-ca.csr
+	$(OPENSSL) req -x509 -config $(test_ca_config_file) -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 0 -days 3653 -sha256 -in test-ca.csr -out $@
+all_final += test-ca-sha256.crt
+
+cli_crt_key_file_rsa = cli-rsa.key
+cli_crt_extensions_file = cli.opensslconf
+
+cli-rsa.csr: $(cli_crt_key_file_rsa)
+	$(OPENSSL) req -new -key $(cli_crt_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -subj "/C=NL/O=PolarSSL/CN=PolarSSL Client 2" -out $@
+all_intermediate += cli-rsa.csr
+cli-rsa-sha1.crt: $(cli_crt_key_file_rsa) test-ca-sha1.crt cli-rsa.csr
+	$(OPENSSL) x509 -req -extfile $(cli_crt_extensions_file) -extensions cli-rsa -CA test-ca-sha1.crt -CAkey $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 4 -days 3653 -sha1 -in cli-rsa.csr -out $@
+all_final += cli-rsa-sha1.crt
+cli-rsa-sha256.crt: $(cli_crt_key_file_rsa) test-ca-sha256.crt cli-rsa.csr
+	$(OPENSSL) x509 -req -extfile $(cli_crt_extensions_file) -extensions cli-rsa -CA test-ca-sha256.crt -CAkey $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 4 -days 3653 -sha256 -in cli-rsa.csr -out $@
+all_final += cli-rsa-sha256.crt
+
+server2-rsa.csr: server2.key
+	$(OPENSSL) req -new -key server2.key -passin "pass:$(test_ca_pwd_rsa)" -subj "/C=NL/O=PolarSSL/CN=localhost" -out $@
+all_intermediate += server2-rsa.csr
+server2-sha256.crt: server2-rsa.csr
+	$(OPENSSL) x509 -req -extfile $(cli_crt_extensions_file) -extensions cli-rsa -CA test-ca-sha256.crt -CAkey $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 4 -days 3653 -sha256 -in server2-rsa.csr -out $@
+all_final += server2-sha256.crt
+
+
+
+################################################################
+#### Meta targets
+################################################################
+
+all_final: $(all_final)
+all: $(all_intermediate) $(all_final)
+
+.PHONY: default all_final all
+
+# These files should not be committed to the repository.
+list_intermediate:
+	@printf '%s\n' $(all_intermediate) | sort
+# These files should be committed to the repository so that the test data is
+# available upon checkout without running a randomized process depending on
+# third-party tools.
+list_final:
+	@printf '%s\n' $(all_final) | sort
+.PHONY: list_intermediate list_final
+
+## Remove intermediate files
+clean:
+	rm -f $(all_intermediate)
+## Remove all build products, even the ones that are committed
+neat: clean
+	rm -f $(all_final)
+.PHONY: clean neat
diff --git a/tests/data_files/Readme-x509.txt b/tests/data_files/Readme-x509.txt
index 680d612..60b0fd4 100644
--- a/tests/data_files/Readme-x509.txt
+++ b/tests/data_files/Readme-x509.txt
@@ -6,6 +6,8 @@
 There are two main CAs for use as trusted roots:
 - test-ca.crt aka "C=NL, O=PolarSSL, CN=PolarSSL Test CA"
   uses a RSA-2048 key
+  test-ca-sha1.crt and test-ca-sha256.crt use the same key, signed with
+  different hashes.
 - test-ca2*.crt aka "C=NL, O=PolarSSL, CN=Polarssl Test EC CA"
   uses an EC key with NIST P-384 (aka secp384r1)
   variants used to test the keyUsage extension
@@ -53,6 +55,8 @@
 - cert_md*.crt, cert_sha*.crt: 1 R: signature hash
 - cert_v1_with_ext.crt: 1 R: v1 with extensions (illegal)
 - cli2.crt: 2 E: basic
+- cli-rsa.key, cli-rsa-*.crt: RSA key used for test clients, signed by
+  the RSA test CA.
 - enco-cert-utf8str.pem: see enco-ca-prstr.pem above
 - server1*.crt: 1* R C* P1*: misc *(server1-v1 see test-ca-v1.crt above)
     *CRL for: .cert_type.crt, .crt, .key_usage.crt, .v1.crt
@@ -91,3 +95,13 @@
 
 Note: crl_future would revoke server9 and cert_sha384.crt if signed by CA 1
       crl-rsa-pss* would revoke server6.crt if signed by CA 2
+
+Generation
+----------
+
+Newer test files have been generated through commands in the Makefile. The
+resulting files are committed to the repository so that the tests can
+run without having to re-do the generation and so that the output is the
+same for everyone (the generation process is randomized).
+
+The origin of older certificates has not been recorded.
diff --git a/tests/data_files/cli-rsa-sha1.crt b/tests/data_files/cli-rsa-sha1.crt
new file mode 100644
index 0000000..906f6df
--- /dev/null
+++ b/tests/data_files/cli-rsa-sha1.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/cli-rsa-sha256.crt b/tests/data_files/cli-rsa-sha256.crt
new file mode 100644
index 0000000..a0fc11e
--- /dev/null
+++ b/tests/data_files/cli-rsa-sha256.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDhTCCAm2gAwIBAgIBBDANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER
+MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
+MTcwNTA1MTMwNzU5WhcNMjcwNTA2MTMwNzU5WjA8MQswCQYDVQQGEwJOTDERMA8G
+A1UECgwIUG9sYXJTU0wxGjAYBgNVBAMMEVBvbGFyU1NMIENsaWVudCAyMIIBIjAN
+BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyHTEzLn5tXnpRdkUYLB9u5Pyax6f
+M60Nj4o8VmXl3ETZzGaFB9X4J7BKNdBjngpuG7fa8H6r7gwQk4ZJGDTzqCrSV/Uu
+1C93KYRhTYJQj6eVSHD1bk2y1RPD0hrt5kPqQhTrdOrA7R/UV06p86jt0uDBMHEw
+MjDV0/YI0FZPRo7yX/k9Z5GIMC5Cst99++UMd//sMcB4j7/Cf8qtbCHWjdmLao5v
+4Jv4EFbMs44TFeY0BGbH7vk2DmqV9gmaBmf0ZXH4yqSxJeD+PIs1BGe64E92hfx/
+/DZrtenNLQNiTrM9AM+vdqBpVoNq0qjU51Bx5rU2BXcFbXvI5MT9TNUhXwIDAQAB
+o4GSMIGPMB0GA1UdDgQWBBRxoQBzckAvVHZeM/xSj7zx3WtGITBjBgNVHSMEXDBa
+gBS0WuSls97SUva51aaVD+s+vMf9/6E/pD0wOzELMAkGA1UEBhMCTkwxETAPBgNV
+BAoMCFBvbGFyU1NMMRkwFwYDVQQDDBBQb2xhclNTTCBUZXN0IENBggEAMAkGA1Ud
+EwQCMAAwDQYJKoZIhvcNAQELBQADggEBAC7yO786NvcHpK8UovKIG9cB32oSQQom
+LoR0eHDRzdqEkoq7yGZufHFiRAAzbMqJfogRtxlrWAeB4y/jGaMBV25IbFOIcH2W
+iCEaMMbG+VQLKNvuC63kmw/Zewc9ThM6Pa1Hcy0axT0faf1B/U01j0FIcw/6mTfK
+D8w48OIwc1yr0JtutCVjig5DC0yznGMt32RyseOLcUe+lfq005v2PAiCozr5X8rE
+ofGZpiM2NqRPePgYy+Vc75Zk28xkRQq1ncprgQb3S4vTsZdScpM9hLf+eMlrgqlj
+c5PLSkXBeLE5+fedkyfTaLxxQlgCpuoOhKBm04/R1pWNzUHyqagjO9Q=
+-----END CERTIFICATE-----
diff --git a/tests/data_files/cli-rsa.key b/tests/data_files/cli-rsa.key
new file mode 100644
index 0000000..eb1d3bc
--- /dev/null
+++ b/tests/data_files/cli-rsa.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
\ No newline at end of file
diff --git a/tests/data_files/cli.opensslconf b/tests/data_files/cli.opensslconf
new file mode 100644
index 0000000..ae9ab9d
--- /dev/null
+++ b/tests/data_files/cli.opensslconf
@@ -0,0 +1,4 @@
+[cli-rsa]
+subjectKeyIdentifier=hash
+authorityKeyIdentifier=keyid:always,issuer:always
+basicConstraints = CA:false
diff --git a/tests/data_files/print_c.pl b/tests/data_files/print_c.pl
new file mode 100755
index 0000000..d0ec137
--- /dev/null
+++ b/tests/data_files/print_c.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+if (!@ARGV || $ARGV[0] == '--help') {
+    print <<EOF;
+Usage: $0 mbedtls_test_foo <file.pem
+       $0 TEST_FOO mbedtls_test_foo <file.pem
+Print out a PEM file as C code defining a string constant.
+
+Used to include some of the test data in /library/certs.c for
+self-tests and sample programs.
+EOF
+    exit;
+}
+
+my $pp_name = @ARGV > 1 ? shift @ARGV : undef;
+my $name = shift @ARGV;
+
+my @lines = map {chomp; s/([\\"])/\\$1/g; "\"$_\\r\\n\""} <STDIN>;
+
+if (defined $pp_name) {
+    foreach ("#define $pp_name", @lines[0..@lines-2]) {
+        printf "%-72s\\\n", $_;
+    }
+    print "$lines[@lines-1]\n";
+    print "const char $name\[\] = $pp_name;\n";
+} else {
+    print "const char $name\[\] =";
+    foreach (@lines) {
+        print "\n$_";
+    }
+    print ";\n";
+}
diff --git a/tests/data_files/server2-sha256.crt b/tests/data_files/server2-sha256.crt
new file mode 100644
index 0000000..006d9db
--- /dev/null
+++ b/tests/data_files/server2-sha256.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca-sha1.crt b/tests/data_files/test-ca-sha1.crt
new file mode 100644
index 0000000..7cb35d4
--- /dev/null
+++ b/tests/data_files/test-ca-sha1.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca-sha256.crt b/tests/data_files/test-ca-sha256.crt
new file mode 100644
index 0000000..b14e405
--- /dev/null
+++ b/tests/data_files/test-ca-sha256.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca.opensslconf b/tests/data_files/test-ca.opensslconf
new file mode 100644
index 0000000..12835df
--- /dev/null
+++ b/tests/data_files/test-ca.opensslconf
@@ -0,0 +1,13 @@
+[req]
+x509_extensions = v3_ca
+distinguished_name = req_dn
+
+[req_dn]
+countryName = NL
+organizationalUnitName = PolarSSL
+commonName = PolarSSL Test CA
+
+[v3_ca]
+subjectKeyIdentifier=hash
+authorityKeyIdentifier=keyid:always,issuer:always
+basicConstraints = CA:true
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index ea96901..7c33c5c 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -486,6 +486,15 @@
 armc6_build_test "--target=arm-arm-none-eabi -march=armv8-m.main"
 armc6_build_test "--target=aarch64-arm-none-eabi"
 
+msg "build: allow SHA1 in certificates by default"
+cleanup
+cp "$CONFIG_H" "$CONFIG_BAK"
+scripts/config.pl set MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+CFLAGS='-Werror -Wall -Wextra' make
+msg "test: allow SHA1 in certificates by default"
+make test
+tests/ssl-opt.sh -f SHA-1
+
 msg "build: Windows cross build - mingw64, make (Link Library)" # ~ 30s
 cleanup
 CC=i686-w64-mingw32-gcc AR=i686-w64-mingw32-ar LD=i686-w64-minggw32-ld CFLAGS='-Werror -Wall -Wextra' WINDOWS_BUILD=1 make lib programs
diff --git a/tests/scripts/check-doxy-blocks.pl b/tests/scripts/check-doxy-blocks.pl
index abd27a8..b0fd696 100755
--- a/tests/scripts/check-doxy-blocks.pl
+++ b/tests/scripts/check-doxy-blocks.pl
@@ -19,6 +19,10 @@
 # everything with a backslach except '\0' and backslash at EOL
 my $doxy_re = qr/\\(?!0|\n)/;
 
+# Return an error code to the environment if a potential error in the
+# source code is found.
+my $exit_code = 0;
+
 sub check_file {
     my ($fname) = @_;
     open my $fh, '<', $fname or die "Failed to open '$fname': $!\n";
@@ -32,6 +36,7 @@
         if ($block_start and $line =~ m/$doxy_re/) {
             print "$fname:$block_start: directive on line $.\n";
             $block_start = 0; # report only one directive per block
+            $exit_code = 1;
         }
     }
 
@@ -45,13 +50,15 @@
     }
 }
 
-# locate root directory based on invocation name
-my $root = dirname($0) . '/..';
-chdir $root or die "Can't chdir to '$root': $!\n";
-
-# just do it
+# Check that the script is being run from the project's root directory.
 for my $dir (@directories) {
-    check_dir($dir)
+    if (! -d $dir) {
+        die "This script must be run from the mbed TLS root directory";
+    } else {
+        check_dir($dir)
+    }
 }
 
+exit $exit_code;
+
 __END__
diff --git a/tests/scripts/run-test-suites.pl b/tests/scripts/run-test-suites.pl
index 58f827c..1f73a54 100755
--- a/tests/scripts/run-test-suites.pl
+++ b/tests/scripts/run-test-suites.pl
@@ -33,7 +33,10 @@
     $verbose = TRUE;
 }
 
-my @suites = grep { ! /\.(?:c|gcno|gcda|dSYM)$/ } glob 'test_suite_*';
+# All test suites = executable files, excluding source files, debug
+# and profiling information, etc. We can't just grep {! /\./} because
+#some of our test cases' base names contain a dot.
+my @suites = grep { -x $_ || /\.exe$/ } glob 'test_suite_*';
 die "$0: no test suite found\n" unless @suites;
 
 # in case test suites are linked dynamically
diff --git a/tests/scripts/tcp_client.pl b/tests/scripts/tcp_client.pl
new file mode 100755
index 0000000..11cbf1b
--- /dev/null
+++ b/tests/scripts/tcp_client.pl
@@ -0,0 +1,86 @@
+#!/usr/bin/env perl
+
+# A simple TCP client that sends some data and expects a response.
+# Usage: tcp_client.pl HOSTNAME PORT DATA1 RESPONSE1
+#   DATA: hex-encoded data to send to the server
+#   RESPONSE: regexp that must match the server's response
+
+use warnings;
+use strict;
+use IO::Socket::INET;
+
+# Pack hex digits into a binary string, ignoring whitespace.
+sub parse_hex {
+    my ($hex) = @_;
+    $hex =~ s/\s+//g;
+    return pack('H*', $hex);
+}
+
+## Open a TCP connection to the specified host and port.
+sub open_connection {
+    my ($host, $port) = @_;
+    my $socket = IO::Socket::INET->new(PeerAddr => $host,
+                                       PeerPort => $port,
+                                       Proto => 'tcp',
+                                       Timeout => 1);
+    die "Cannot connect to $host:$port: $!" unless $socket;
+    return $socket;
+}
+
+## Close the TCP connection.
+sub close_connection {
+    my ($connection) = @_;
+    $connection->shutdown(2);
+    # Ignore shutdown failures (at least for now)
+    return 1;
+}
+
+## Write the given data, expressed as hexadecimal
+sub write_data {
+    my ($connection, $hexdata) = @_;
+    my $data = parse_hex($hexdata);
+    my $total_sent = 0;
+    while ($total_sent < length($data)) {
+        my $sent = $connection->send($data, 0);
+        if (!defined $sent) {
+            die "Unable to send data: $!";
+        }
+        $total_sent += $sent;
+    }
+    return 1;
+}
+
+## Read a response and check it against an expected prefix
+sub read_response {
+    my ($connection, $expected_hex) = @_;
+    my $expected_data = parse_hex($expected_hex);
+    my $start_offset = 0;
+    while ($start_offset < length($expected_data)) {
+        my $actual_data;
+        my $ok = $connection->recv($actual_data, length($expected_data));
+        if (!defined $ok) {
+            die "Unable to receive data: $!";
+        }
+        if (($actual_data ^ substr($expected_data, $start_offset)) =~ /[^\000]/) {
+            printf STDERR ("Received \\x%02x instead of \\x%02x at offset %d\n",
+                           ord(substr($actual_data, $-[0], 1)),
+                           ord(substr($expected_data, $start_offset + $-[0], 1)),
+                           $start_offset + $-[0]);
+            return 0;
+        }
+        $start_offset += length($actual_data);
+    }
+    return 1;
+}
+
+if (@ARGV != 4) {
+    print STDERR "Usage: $0 HOSTNAME PORT DATA1 RESPONSE1\n";
+    exit(3);
+}
+my ($host, $port, $data1, $response1) = @ARGV;
+my $connection = open_connection($host, $port);
+write_data($connection, $data1);
+if (!read_response($connection, $response1)) {
+    exit(1);
+}
+close_connection($connection);
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 41fbc3d..761655f 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -28,11 +28,13 @@
 : ${OPENSSL_CMD:=openssl} # OPENSSL would conflict with the build system
 : ${GNUTLS_CLI:=gnutls-cli}
 : ${GNUTLS_SERV:=gnutls-serv}
+: ${PERL:=perl}
 
 O_SRV="$OPENSSL_CMD s_server -www -cert data_files/server5.crt -key data_files/server5.key"
 O_CLI="echo 'GET / HTTP/1.0' | $OPENSSL_CMD s_client"
 G_SRV="$GNUTLS_SERV --x509certfile data_files/server5.crt --x509keyfile data_files/server5.key"
 G_CLI="echo 'GET / HTTP/1.0' | $GNUTLS_CLI --x509cafile data_files/test-ca_cat12.crt"
+TCP_CLIENT="$PERL scripts/tcp_client.pl"
 
 TESTS=0
 FAILS=0
@@ -49,15 +51,23 @@
 
 PRESERVE_LOGS=0
 
+# Pick a "unique" server port in the range 10000-19999, and a proxy
+# port which is this plus 10000. Each port number may be independently
+# overridden by a command line option.
+SRV_PORT=$(($$ % 10000 + 10000))
+PXY_PORT=$((SRV_PORT + 10000))
+
 print_usage() {
     echo "Usage: $0 [options]"
     printf "  -h|--help\tPrint this help.\n"
     printf "  -m|--memcheck\tCheck memory leaks and errors.\n"
-    printf "  -f|--filter\tOnly matching tests are executed (default: '$FILTER')\n"
-    printf "  -e|--exclude\tMatching tests are excluded (default: '$EXCLUDE')\n"
+    printf "  -f|--filter\tOnly matching tests are executed (BRE; default: '$FILTER')\n"
+    printf "  -e|--exclude\tMatching tests are excluded (BRE; default: '$EXCLUDE')\n"
     printf "  -n|--number\tExecute only numbered test (comma-separated, e.g. '245,256')\n"
     printf "  -s|--show-numbers\tShow test numbers in front of test names\n"
     printf "  -p|--preserve-logs\tPreserve logs of successful tests as well\n"
+    printf "     --port\tTCP/UDP port (default: randomish 1xxxx)\n"
+    printf "     --proxy-port\tTCP/UDP proxy port (default: randomish 2xxxx)\n"
     printf "     --seed\tInteger seed value to use for this test run\n"
 }
 
@@ -82,6 +92,12 @@
             -p|--preserve-logs)
                 PRESERVE_LOGS=1
                 ;;
+            --port)
+                shift; SRV_PORT=$1
+                ;;
+            --proxy-port)
+                shift; PXY_PORT=$1
+                ;;
             --seed)
                 shift; SEED="$1"
                 ;;
@@ -106,6 +122,13 @@
     fi
 }
 
+# skip next test if the flag is enabled in config.h
+requires_config_disabled() {
+    if grep "^#define $1" $CONFIG_H > /dev/null; then
+        SKIP_NEXT="YES"
+    fi
+}
+
 # skip next test if OpenSSL doesn't support FALLBACK_SCSV
 requires_openssl_with_fallback_scsv() {
     if [ -z "${OPENSSL_HAS_FBSCSV:-}" ]; then
@@ -611,13 +634,6 @@
 CLI_DELAY_FACTOR=1
 SRV_DELAY_SECONDS=0
 
-# Pick a "unique" server port in the range 10000-19999, and a proxy port
-PORT_BASE="0000$$"
-PORT_BASE="$( printf $PORT_BASE | tail -c 4 )"
-SRV_PORT="1$PORT_BASE"
-PXY_PORT="2$PORT_BASE"
-unset PORT_BASE
-
 # fix commands to use this port, force IPv4 while at it
 # +SRV_PORT will be replaced by either $SRV_PORT or $PXY_PORT later
 P_SRV="$P_SRV server_addr=127.0.0.1 server_port=$SRV_PORT"
@@ -628,6 +644,10 @@
 G_SRV="$G_SRV -p $SRV_PORT"
 G_CLI="$G_CLI -p +SRV_PORT localhost"
 
+# Allow SHA-1, because many of our test certificates use it
+P_SRV="$P_SRV allow_sha1=1"
+P_CLI="$P_CLI allow_sha1=1"
+
 # Also pick a unique name for intermediate files
 SRV_OUT="srv_out.$$"
 CLI_OUT="cli_out.$$"
@@ -699,6 +719,54 @@
             -S "SSL - None of the common ciphersuites is usable" \
             -S "SSL - The server has no ciphersuites in common"
 
+# Tests for SHA-1 support
+
+requires_config_disabled MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+run_test    "SHA-1 forbidden by default in server certificate" \
+            "$P_SRV key_file=data_files/server2.key crt_file=data_files/server2.crt" \
+            "$P_CLI debug_level=2 allow_sha1=0" \
+            1 \
+            -c "The certificate is signed with an unacceptable hash"
+
+requires_config_enabled MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+run_test    "SHA-1 forbidden by default in server certificate" \
+            "$P_SRV key_file=data_files/server2.key crt_file=data_files/server2.crt" \
+            "$P_CLI debug_level=2 allow_sha1=0" \
+            0
+
+run_test    "SHA-1 explicitly allowed in server certificate" \
+            "$P_SRV key_file=data_files/server2.key crt_file=data_files/server2.crt" \
+            "$P_CLI allow_sha1=1" \
+            0
+
+run_test    "SHA-256 allowed by default in server certificate" \
+            "$P_SRV key_file=data_files/server2.key crt_file=data_files/server2-sha256.crt" \
+            "$P_CLI allow_sha1=0" \
+            0
+
+requires_config_disabled MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+run_test    "SHA-1 forbidden by default in client certificate" \
+            "$P_SRV auth_mode=required allow_sha1=0" \
+            "$P_CLI key_file=data_files/cli-rsa.key crt_file=data_files/cli-rsa-sha1.crt" \
+            1 \
+            -s "The certificate is signed with an unacceptable hash"
+
+requires_config_enabled MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+run_test    "SHA-1 forbidden by default in client certificate" \
+            "$P_SRV auth_mode=required allow_sha1=0" \
+            "$P_CLI key_file=data_files/cli-rsa.key crt_file=data_files/cli-rsa-sha1.crt" \
+            0
+
+run_test    "SHA-1 explicitly allowed in client certificate" \
+            "$P_SRV auth_mode=required allow_sha1=1" \
+            "$P_CLI key_file=data_files/cli-rsa.key crt_file=data_files/cli-rsa-sha1.crt" \
+            0
+
+run_test    "SHA-256 allowed by default in client certificate" \
+            "$P_SRV auth_mode=required allow_sha1=0" \
+            "$P_CLI key_file=data_files/cli-rsa.key crt_file=data_files/cli-rsa-sha256.crt" \
+            0
+
 # Tests for Truncated HMAC extension
 
 run_test    "Truncated HMAC: client default, server default" \
@@ -965,6 +1033,37 @@
             -s "received FALLBACK_SCSV" \
             -S "inapropriate fallback"
 
+## ClientHello generated with
+## "openssl s_client -CAfile tests/data_files/test-ca.crt -tls1_1 -connect localhost:4433 -cipher ..."
+## then manually twiddling the ciphersuite list.
+## The ClientHello content is spelled out below as a hex string as
+## "prefix ciphersuite1 ciphersuite2 ciphersuite3 ciphersuite4 suffix".
+## The expected response is an inappropriate_fallback alert.
+requires_openssl_with_fallback_scsv
+run_test    "Fallback SCSV: beginning of list" \
+            "$P_SRV debug_level=2" \
+            "$TCP_CLIENT localhost $SRV_PORT '160301003e0100003a03022aafb94308dc22ca1086c65acc00e414384d76b61ecab37df1633b1ae1034dbe000008 5600 0031 0032 0033 0100000900230000000f000101' '15030200020256'" \
+            0 \
+            -s "received FALLBACK_SCSV" \
+            -s "inapropriate fallback"
+
+requires_openssl_with_fallback_scsv
+run_test    "Fallback SCSV: end of list" \
+            "$P_SRV debug_level=2" \
+            "$TCP_CLIENT localhost $SRV_PORT '160301003e0100003a03022aafb94308dc22ca1086c65acc00e414384d76b61ecab37df1633b1ae1034dbe000008 0031 0032 0033 5600 0100000900230000000f000101' '15030200020256'" \
+            0 \
+            -s "received FALLBACK_SCSV" \
+            -s "inapropriate fallback"
+
+## Here the expected response is a valid ServerHello prefix, up to the random.
+requires_openssl_with_fallback_scsv
+run_test    "Fallback SCSV: not in list" \
+            "$P_SRV debug_level=2" \
+            "$TCP_CLIENT localhost $SRV_PORT '160301003e0100003a03022aafb94308dc22ca1086c65acc00e414384d76b61ecab37df1633b1ae1034dbe000008 0056 0031 0032 0033 0100000900230000000f000101' '16030200300200002c0302'" \
+            0 \
+            -S "received FALLBACK_SCSV" \
+            -S "inapropriate fallback"
+
 # Tests for CBC 1/n-1 record splitting
 
 run_test    "CBC Record splitting: TLS 1.2, no splitting" \
@@ -1759,6 +1858,54 @@
             -C "! mbedtls_ssl_handshake returned" \
             -C "X509 - Certificate verification failed"
 
+run_test    "Authentication: server goodcert, client optional, no trusted CA" \
+            "$P_SRV" \
+            "$P_CLI debug_level=3 auth_mode=optional ca_file=none ca_path=none" \
+            0 \
+            -c "x509_verify_cert() returned" \
+            -c "! The certificate is not correctly signed by the trusted CA" \
+            -c "! Certificate verification flags"\
+            -C "! mbedtls_ssl_handshake returned" \
+            -C "X509 - Certificate verification failed" \
+            -C "SSL - No CA Chain is set, but required to operate"
+
+run_test    "Authentication: server goodcert, client required, no trusted CA" \
+            "$P_SRV" \
+            "$P_CLI debug_level=3 auth_mode=required ca_file=none ca_path=none" \
+            1 \
+            -c "x509_verify_cert() returned" \
+            -c "! The certificate is not correctly signed by the trusted CA" \
+            -c "! Certificate verification flags"\
+            -c "! mbedtls_ssl_handshake returned" \
+            -c "SSL - No CA Chain is set, but required to operate"
+
+# The purpose of the next two tests is to test the client's behaviour when receiving a server
+# certificate with an unsupported elliptic curve. This should usually not happen because
+# the client informs the server about the supported curves - it does, though, in the
+# corner case of a static ECDH suite, because the server doesn't check the curve on that
+# occasion (to be fixed). If that bug's fixed, the test needs to be altered to use a
+# different means to have the server ignoring the client's supported curve list.
+
+requires_config_enabled MBEDTLS_ECP_C
+run_test    "Authentication: server ECDH p256v1, client required, p256v1 unsupported" \
+            "$P_SRV debug_level=1 key_file=data_files/server5.key \
+             crt_file=data_files/server5.ku-ka.crt" \
+            "$P_CLI debug_level=3 auth_mode=required curves=secp521r1" \
+            1 \
+            -c "bad certificate (EC key curve)"\
+            -c "! Certificate verification flags"\
+            -C "bad server certificate (ECDH curve)" # Expect failure at earlier verification stage
+
+requires_config_enabled MBEDTLS_ECP_C
+run_test    "Authentication: server ECDH p256v1, client optional, p256v1 unsupported" \
+            "$P_SRV debug_level=1 key_file=data_files/server5.key \
+             crt_file=data_files/server5.ku-ka.crt" \
+            "$P_CLI debug_level=3 auth_mode=optional curves=secp521r1" \
+            1 \
+            -c "bad certificate (EC key curve)"\
+            -c "! Certificate verification flags"\
+            -c "bad server certificate (ECDH curve)" # Expect failure only at ECDH params check
+
 run_test    "Authentication: server badcert, client none" \
             "$P_SRV crt_file=data_files/server5-badsign.crt \
              key_file=data_files/server5.key" \
@@ -1787,6 +1934,38 @@
             -c "Supported Signature Algorithm found: 4," \
             -c "Supported Signature Algorithm found: 5,"
 
+requires_config_enabled MBEDTLS_SSL_PROTO_SSL3
+run_test    "Authentication: client has no cert, server required (SSLv3)" \
+            "$P_SRV debug_level=3 min_version=ssl3 auth_mode=required" \
+            "$P_CLI debug_level=3 force_version=ssl3 crt_file=none \
+             key_file=data_files/server5.key" \
+            1 \
+            -S "skip write certificate request" \
+            -C "skip parse certificate request" \
+            -c "got a certificate request" \
+            -c "got no certificate to send" \
+            -S "x509_verify_cert() returned" \
+            -s "client has no certificate" \
+            -s "! mbedtls_ssl_handshake returned" \
+            -c "! mbedtls_ssl_handshake returned" \
+            -s "No client certification received from the client, but required by the authentication mode"
+
+run_test    "Authentication: client has no cert, server required (TLS)" \
+            "$P_SRV debug_level=3 auth_mode=required" \
+            "$P_CLI debug_level=3 crt_file=none \
+             key_file=data_files/server5.key" \
+            1 \
+            -S "skip write certificate request" \
+            -C "skip parse certificate request" \
+            -c "got a certificate request" \
+            -c "= write certificate$" \
+            -C "skip write certificate$" \
+            -S "x509_verify_cert() returned" \
+            -s "client has no certificate" \
+            -s "! mbedtls_ssl_handshake returned" \
+            -c "! mbedtls_ssl_handshake returned" \
+            -s "No client certification received from the client, but required by the authentication mode"
+
 run_test    "Authentication: client badcert, server required" \
             "$P_SRV debug_level=3 auth_mode=required" \
             "$P_CLI debug_level=3 crt_file=data_files/server5-badsign.crt \
@@ -1801,6 +1980,27 @@
             -s "x509_verify_cert() returned" \
             -s "! The certificate is not correctly signed by the trusted CA" \
             -s "! mbedtls_ssl_handshake returned" \
+            -s "send alert level=2 message=48" \
+            -c "! mbedtls_ssl_handshake returned" \
+            -s "X509 - Certificate verification failed"
+# We don't check that the client receives the alert because it might
+# detect that its write end of the connection is closed and abort
+# before reading the alert message.
+
+run_test    "Authentication: client cert not trusted, server required" \
+            "$P_SRV debug_level=3 auth_mode=required" \
+            "$P_CLI debug_level=3 crt_file=data_files/server5-selfsigned.crt \
+             key_file=data_files/server5.key" \
+            1 \
+            -S "skip write certificate request" \
+            -C "skip parse certificate request" \
+            -c "got a certificate request" \
+            -C "skip write certificate" \
+            -C "skip write certificate verify" \
+            -S "skip parse certificate verify" \
+            -s "x509_verify_cert() returned" \
+            -s "! The certificate is not correctly signed by the trusted CA" \
+            -s "! mbedtls_ssl_handshake returned" \
             -c "! mbedtls_ssl_handshake returned" \
             -s "X509 - Certificate verification failed"
 
@@ -1875,6 +2075,16 @@
             -c "skip write certificate verify" \
             -C "! mbedtls_ssl_handshake returned"
 
+run_test    "Authentication: client no cert, openssl server required" \
+            "$O_SRV -Verify 10" \
+            "$P_CLI debug_level=3 crt_file=none key_file=none" \
+            1 \
+            -C "skip parse certificate request" \
+            -c "got a certificate request" \
+            -C "skip write certificate$" \
+            -c "skip write certificate verify" \
+            -c "! mbedtls_ssl_handshake returned"
+
 requires_config_enabled MBEDTLS_SSL_PROTO_SSL3
 run_test    "Authentication: client no cert, ssl3" \
             "$P_SRV debug_level=3 auth_mode=optional force_version=ssl3" \
@@ -1893,6 +2103,34 @@
             -C "! mbedtls_ssl_handshake returned" \
             -S "X509 - Certificate verification failed"
 
+# Tests for CA list in CertificateRequest messages
+
+run_test    "Authentication: send CA list in CertificateRequest  (default)" \
+            "$P_SRV debug_level=3 auth_mode=required" \
+            "$P_CLI crt_file=data_files/server6.crt \
+             key_file=data_files/server6.key" \
+            0 \
+            -s "requested DN"
+
+run_test    "Authentication: do not send CA list in CertificateRequest" \
+            "$P_SRV debug_level=3 auth_mode=required cert_req_ca_list=0" \
+            "$P_CLI crt_file=data_files/server6.crt \
+             key_file=data_files/server6.key" \
+            0 \
+            -S "requested DN"
+
+run_test    "Authentication: send CA list in CertificateRequest, client self signed" \
+            "$P_SRV debug_level=3 auth_mode=required cert_req_ca_list=0" \
+            "$P_CLI debug_level=3 crt_file=data_files/server5-selfsigned.crt \
+             key_file=data_files/server5.key" \
+            1 \
+            -S "requested DN" \
+            -s "x509_verify_cert() returned" \
+            -s "! The certificate is not correctly signed by the trusted CA" \
+            -s "! mbedtls_ssl_handshake returned" \
+            -c "! mbedtls_ssl_handshake returned" \
+            -s "X509 - Certificate verification failed"
+
 # Tests for certificate selection based on SHA verson
 
 run_test    "Certificate hash: client TLS 1.2 -> SHA-2" \
@@ -2825,12 +3063,19 @@
 # Test for ClientHello without extensions
 
 requires_gnutls
-run_test    "ClientHello without extensions" \
+run_test    "ClientHello without extensions, SHA-1 allowed" \
             "$P_SRV debug_level=3" \
             "$G_CLI --priority=NORMAL:%NO_EXTENSIONS:%DISABLE_SAFE_RENEGOTIATION" \
             0 \
             -s "dumping 'client hello extensions' (0 bytes)"
 
+requires_gnutls
+run_test    "ClientHello without extensions, SHA-1 forbidden in certificates on server" \
+            "$P_SRV debug_level=3 key_file=data_files/server2.key crt_file=data_files/server2.crt allow_sha1=0" \
+            "$G_CLI --priority=NORMAL:%NO_EXTENSIONS:%DISABLE_SAFE_RENEGOTIATION" \
+            0 \
+            -s "dumping 'client hello extensions' (0 bytes)"
+
 # Tests for mbedtls_ssl_get_bytes_avail()
 
 run_test    "mbedtls_ssl_get_bytes_avail: no extra data" \
diff --git a/tests/suites/test_suite_ecjpake.function b/tests/suites/test_suite_ecjpake.function
index 11cf8dc..5c8856b 100644
--- a/tests/suites/test_suite_ecjpake.function
+++ b/tests/suites/test_suite_ecjpake.function
@@ -109,7 +109,10 @@
 void read_round_one( int role, char *data, int ref_ret )
 {
     mbedtls_ecjpake_context ctx;
-    const unsigned char pw[] = {};
+
+    const unsigned char * pw = NULL;
+    const size_t pw_len = 0;
+
     unsigned char *msg;
     size_t len;
 
@@ -119,7 +122,7 @@
     TEST_ASSERT( msg != NULL );
 
     TEST_ASSERT( mbedtls_ecjpake_setup( &ctx, role,
-                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, 0 ) == 0 );
+                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, pw_len ) == 0 );
 
     TEST_ASSERT( mbedtls_ecjpake_read_round_one( &ctx, msg, len ) == ref_ret );
 
@@ -133,7 +136,10 @@
 void read_round_two_cli( char *data, int ref_ret )
 {
     mbedtls_ecjpake_context ctx;
-    const unsigned char pw[] = {};
+
+    const unsigned char * pw = NULL;
+    const size_t pw_len = 0;
+
     unsigned char *msg;
     size_t len;
 
@@ -143,7 +149,7 @@
     TEST_ASSERT( msg != NULL );
 
     TEST_ASSERT( mbedtls_ecjpake_setup( &ctx, MBEDTLS_ECJPAKE_CLIENT,
-                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, 0 ) == 0 );
+                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, pw_len ) == 0 );
 
     TEST_ASSERT( ecjpake_test_load( &ctx,
                  ADD_SIZE( ecjpake_test_x1 ), ADD_SIZE( ecjpake_test_x2 ),
@@ -163,7 +169,10 @@
 void read_round_two_srv( char *data, int ref_ret )
 {
     mbedtls_ecjpake_context ctx;
-    const unsigned char pw[] = {};
+
+    const unsigned char * pw = NULL;
+    const size_t pw_len = 0;
+
     unsigned char *msg;
     size_t len;
 
@@ -173,7 +182,7 @@
     TEST_ASSERT( msg != NULL );
 
     TEST_ASSERT( mbedtls_ecjpake_setup( &ctx, MBEDTLS_ECJPAKE_SERVER,
-                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, 0 ) == 0 );
+                 MBEDTLS_MD_SHA256, MBEDTLS_ECP_DP_SECP256R1, pw, pw_len ) == 0 );
 
     TEST_ASSERT( ecjpake_test_load( &ctx,
                  ADD_SIZE( ecjpake_test_x3 ), ADD_SIZE( ecjpake_test_x4 ),
diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index da830fe..17cf350 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -521,7 +521,7 @@
 mbedtls_mpi_exp_mod:10:"433019240910377478217373572959560109819648647016096560523769010881172869083338285573756574557395862965095016483867813043663981946477698466501451832407592327356331263124555137732393938242285782144928753919588632679050799198937132922145084847":10:"5781538327977828897150909166778407659250458379645823062042492461576758526757490910073628008613977550546382774775570888130029763571528699574717583228939535960234464230882573615930384979100379102915657483866755371559811718767760594919456971354184113721":10:"583137007797276923956891216216022144052044091311388601652961409557516421612874571554415606746479105795833145583959622117418531166391184939066520869800857530421873250114773204354963864729386957427276448683092491947566992077136553066273207777134303397724679138833126700957":10:"":10:"114597449276684355144920670007147953232659436380163461553186940113929777196018164149703566472936578890991049344459204199888254907113495794730452699842273939581048142004834330369483813876618772578869083248061616444392091693787039636316845512292127097865026290173004860736":0
 
 Test mbedtls_mpi_exp_mod (Negative base)
-mbedtls_mpi_exp_mod:10:"-10000000000":10:"10000000000":10:"99999":10:"":10:"99998":0
+mbedtls_mpi_exp_mod:10:"-10000000000":10:"10000000000":10:"99999":10:"":10:"1":0
 
 Test mbedtls_mpi_exp_mod (Negative base)
 mbedtls_mpi_exp_mod:16:"-9f13012cd92aa72fb86ac8879d2fde4f7fd661aaae43a00971f081cc60ca277059d5c37e89652e2af2585d281d66ef6a9d38a117e9608e9e7574cd142dc55278838a2161dd56db9470d4c1da2d5df15a908ee2eb886aaa890f23be16de59386663a12f1afbb325431a3e835e3fd89b98b96a6f77382f458ef9a37e1f84a03045c8676ab55291a94c2228ea15448ee96b626b998":16:"40a54d1b9e86789f06d9607fb158672d64867665c73ee9abb545fc7a785634b354c7bae5b962ce8040cf45f2c1f3d3659b2ee5ede17534c8fc2ec85c815e8df1fe7048d12c90ee31b88a68a081f17f0d8ce5f4030521e9400083bcea73a429031d4ca7949c2000d597088e0c39a6014d8bf962b73bb2e8083bd0390a4e00b9b3":16:"eeaf0ab9adb38dd69c33f80afa8fc5e86072618775ff3c0b9ea2314c9c256576d674df7496ea81d3383b4813d692c6e0e0d5d8e250b98be48e495c1d6089dad15dc7d7b46154d6b6ce8ef4ad69b15d4982559b297bcf1885c529f566660e57ec68edbc3c05726cc02fd4cbf4976eaa9afd5138fe8376435b9fc61d2fc0eb06e3":16:"":16:"21acc7199e1b90f9b4844ffe12c19f00ec548c5d32b21c647d48b6015d8eb9ec9db05b4f3d44db4227a2b5659c1a7cceb9d5fa8fa60376047953ce7397d90aaeb7465e14e820734f84aa52ad0fc66701bcbb991d57715806a11531268e1e83dd48288c72b424a6287e9ce4e5cc4db0dd67614aecc23b0124a5776d36e5c89483":0
@@ -550,6 +550,9 @@
 Base test mbedtls_mpi_inv_mod #4
 mbedtls_mpi_inv_mod:10:"2":10:"4":10:"0":MBEDTLS_ERR_MPI_NOT_ACCEPTABLE
 
+Base test mbedtls_mpi_inv_mod #5
+mbedtls_mpi_inv_mod:10:"3":10:"1":10:"0":MBEDTLS_ERR_MPI_BAD_INPUT_DATA
+
 Test mbedtls_mpi_inv_mod #1
 mbedtls_mpi_inv_mod:16:"aa4df5cb14b4c31237f98bd1faf527c283c2d0f3eec89718664ba33f9762907c":16:"fffbbd660b94412ae61ead9c2906a344116e316a256fd387874c6c675b1d587d":16:"8d6a5c1d7adeae3e94b9bcd2c47e0d46e778bc8804a2cc25c02d775dc3d05b0c":0
 
diff --git a/tests/suites/test_suite_pk.data b/tests/suites/test_suite_pk.data
index 22a7fa8..f6ea378 100644
--- a/tests/suites/test_suite_pk.data
+++ b/tests/suites/test_suite_pk.data
@@ -150,3 +150,6 @@
 depends_on:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_RSA_C
 mbedtls_pk_check_pair:"data_files/ec_256_pub.pem":"data_files/server1.key":MBEDTLS_ERR_PK_TYPE_MISMATCH
 
+RSA hash_len overflow (size_t vs unsigned int)
+depends_on:MBEDTLS_RSA_C:MBEDTLS_HAVE_INT64
+pk_rsa_overflow:
diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index 08a2623..5fa8a69 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -5,6 +5,9 @@
 #include "mbedtls/ecp.h"
 #include "mbedtls/rsa.h"
 
+/* For detecting 64-bit compilation */
+#include "mbedtls/bignum.h"
+
 static int rnd_std_rand( void *rng_state, unsigned char *output, size_t len );
 
 #define RSA_KEY_SIZE 512
@@ -414,6 +417,34 @@
 }
 /* END_CASE */
 
+/* BEGIN_CASE depends_on:MBEDTLS_RSA_C:MBEDTLS_HAVE_INT64 */
+void pk_rsa_overflow( )
+{
+    mbedtls_pk_context pk;
+    size_t hash_len = (size_t)-1;
+
+    mbedtls_pk_init( &pk );
+
+    TEST_ASSERT( mbedtls_pk_setup( &pk,
+                 mbedtls_pk_info_from_type( MBEDTLS_PK_RSA ) ) == 0 );
+
+#if defined(MBEDTLS_PKCS1_V21)
+    TEST_ASSERT( mbedtls_pk_verify_ext( MBEDTLS_PK_RSASSA_PSS, NULL, &pk,
+                    MBEDTLS_MD_NONE, NULL, hash_len, NULL, 0 ) ==
+                 MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* MBEDTLS_PKCS1_V21 */
+
+    TEST_ASSERT( mbedtls_pk_verify( &pk, MBEDTLS_MD_NONE, NULL, hash_len,
+                    NULL, 0 ) == MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+    TEST_ASSERT( mbedtls_pk_sign( &pk, MBEDTLS_MD_NONE, NULL, hash_len, NULL, 0,
+                    rnd_std_rand, NULL ) == MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+exit:
+    mbedtls_pk_free( &pk );
+}
+/* END_CASE */
+
 /* BEGIN_CASE depends_on:MBEDTLS_RSA_C:MBEDTLS_PK_RSA_ALT_SUPPORT */
 void pk_rsa_alt( )
 {
@@ -461,6 +492,11 @@
     /* Test signature */
     TEST_ASSERT( mbedtls_pk_sign( &alt, MBEDTLS_MD_NONE, hash, sizeof hash,
                           sig, &sig_len, rnd_std_rand, NULL ) == 0 );
+#if defined(MBEDTLS_HAVE_INT64)
+    TEST_ASSERT( mbedtls_pk_sign( &alt, MBEDTLS_MD_NONE, hash, (size_t)-1,
+                          NULL, NULL, rnd_std_rand, NULL ) ==
+                 MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+#endif /* MBEDTLS_HAVE_INT64 */
     TEST_ASSERT( sig_len == RSA_KEY_LEN );
     TEST_ASSERT( mbedtls_pk_verify( &rsa, MBEDTLS_MD_NONE,
                             hash, sizeof hash, sig, sig_len ) == 0 );
diff --git a/tests/suites/test_suite_version.data b/tests/suites/test_suite_version.data
index 22e608f..05fa6e7 100644
--- a/tests/suites/test_suite_version.data
+++ b/tests/suites/test_suite_version.data
@@ -1,8 +1,8 @@
 Check compiletime library version
-check_compiletime_version:"2.4.1"
+check_compiletime_version:"2.5.0"
 
 Check runtime library version
-check_runtime_version:"2.4.1"
+check_runtime_version:"2.5.0"
 
 Check for MBEDTLS_VERSION_C
 check_feature:"MBEDTLS_VERSION_C":0
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index 11605ab..08f3324 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -357,375 +357,383 @@
 
 X509 Certificate verification #1 (Revoked Cert, Expired CRL, no CN)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_EXPIRED:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_EXPIRED:"compat":"NULL"
 
 X509 Certificate verification #1a (Revoked Cert, Future CRL, no CN)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_FUTURE:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_FUTURE:"compat":"NULL"
 
 X509 Certificate verification #2 (Revoked Cert, Expired CRL)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Server 1":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_EXPIRED:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Server 1":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_EXPIRED:"compat":"NULL"
 
 X509 Certificate verification #2a (Revoked Cert, Future CRL)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"localhost":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_FUTURE:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"localhost":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_FUTURE:"compat":"NULL"
 
 X509 Certificate verification #3 (Revoked Cert, Future CRL, CN Mismatch)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Wrong CN":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_EXPIRED | MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"PolarSSL Wrong CN":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_EXPIRED | MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #3a (Revoked Cert, Expired CRL, CN Mismatch)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"Wrong CN":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_FUTURE | MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"Wrong CN":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCRL_FUTURE | MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #4 (Valid Cert, Expired CRL)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server2.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_EXPIRED:"NULL"
+x509_verify:"data_files/server2.crt":"data_files/test-ca.crt":"data_files/crl_expired.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_EXPIRED:"compat":"NULL"
 
 X509 Certificate verification #4a (Revoked Cert, Future CRL)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_FUTURE:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.crt":"data_files/crl-future.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_FUTURE:"compat":"NULL"
 
 X509 Certificate verification #5 (Revoked Cert)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #6 (Revoked Cert)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Server 1":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Server 1":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #7 (Revoked Cert, CN Mismatch)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Wrong CN":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"PolarSSL Wrong CN":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED | MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #8 (Valid Cert)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #8a (Expired Cert)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5-expired.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_EXPIRED:"NULL"
+x509_verify:"data_files/server5-expired.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_EXPIRED:"compat":"NULL"
 
 X509 Certificate verification #8b (Future Cert)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5-future.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_FUTURE:"NULL"
+x509_verify:"data_files/server5-future.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_FUTURE:"compat":"NULL"
 
 X509 Certificate verification #9 (Not trusted Cert)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #10 (Not trusted Cert, Expired CRL)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C
-x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #12 (Valid Cert MD4 Digest)
 depends_on:MBEDTLS_MD4_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_md4.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_BAD_MD:"NULL"
+x509_verify:"data_files/cert_md4.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_BAD_MD:"compat":"NULL"
 
 X509 Certificate verification #13 (Valid Cert MD5 Digest)
 depends_on:MBEDTLS_MD5_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_md5.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_BAD_MD:"NULL"
+x509_verify:"data_files/cert_md5.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_BAD_MD:"compat":"NULL"
 
-X509 Certificate verification #14 (Valid Cert SHA1 Digest)
+X509 Certificate verification #14 (Valid Cert SHA1 Digest explicitly allowed in profile)
 depends_on:MBEDTLS_SHA1_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_sha1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/cert_sha1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
+
+X509 Certificate verification #14 (Valid Cert SHA1 Digest allowed in compile-time default profile)
+depends_on:MBEDTLS_SHA1_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+x509_verify:"data_files/cert_sha1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"default":"NULL"
+
+X509 Certificate verification #14 (Valid Cert SHA1 Digest forbidden in default profile)
+depends_on:MBEDTLS_SHA1_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:!MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
+x509_verify:"data_files/cert_sha1.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_BAD_MD | MBEDTLS_X509_BADCERT_BAD_MD:"default":"NULL"
 
 X509 Certificate verification #15 (Valid Cert SHA224 Digest)
 depends_on:MBEDTLS_SHA256_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_sha224.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/cert_sha224.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #16 (Valid Cert SHA256 Digest)
 depends_on:MBEDTLS_SHA256_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_sha256.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/cert_sha256.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #17 (Valid Cert SHA384 Digest)
 depends_on:MBEDTLS_SHA512_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_sha384.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/cert_sha384.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #18 (Valid Cert SHA512 Digest)
 depends_on:MBEDTLS_SHA512_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #19 (Valid Cert, denying callback)
 depends_on:MBEDTLS_SHA512_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_OTHER:"verify_none"
+x509_verify:"data_files/cert_sha512.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_OTHER:"compat":"verify_none"
 
 X509 Certificate verification #19 (Not trusted Cert, allowing callback)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C
-x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":"NULL":0:0:"verify_all"
+x509_verify:"data_files/server2.crt":"data_files/server1.crt":"data_files/crl_expired.pem":"NULL":0:0:"compat":"verify_all"
 
 X509 Certificate verification #21 (domain matching wildcard certificate, case insensitive)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.ExAmPlE.com":0:0:"NULL"
+x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.ExAmPlE.com":0:0:"compat":"NULL"
 
 X509 Certificate verification #22 (domain not matching wildcard certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.example.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.example.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #23 (domain not matching wildcard certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"example.com":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_wildcard.crt":"data_files/test-ca.crt":"data_files/crl.pem":"example.com":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #24 (domain matching CN of multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.com":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.com":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #25 (domain matching multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"example.net":0:0:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"example.net":0:0:"compat":"NULL"
 
 X509 Certificate verification #26 (domain not matching multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #27 (domain not matching multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"xample.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"xample.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #27 (domain not matching multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"bexample.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"bexample.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #28 (domain not matching wildcard in multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"example.org":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"example.org":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH:"compat":"NULL"
 
 X509 Certificate verification #29 (domain matching wildcard in multi certificate)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.example.org":0:0:"NULL"
+x509_verify:"data_files/cert_example_multi.crt":"data_files/test-ca.crt":"data_files/crl.pem":"mail.example.org":0:0:"compat":"NULL"
 
 X509 Certificate verification #30 (domain matching multi certificate without CN)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi_nocn.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.shotokan-braunschweig.de":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/cert_example_multi_nocn.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.shotokan-braunschweig.de":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #31 (domain not matching multi certificate without CN)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15
-x509_verify:"data_files/cert_example_multi_nocn.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH + MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/cert_example_multi_nocn.crt":"data_files/test-ca.crt":"data_files/crl.pem":"www.example.net":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_CN_MISMATCH + MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #32 (Valid, EC cert, RSA CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP192R1_ENABLED:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C
-x509_verify:"data_files/server3.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server3.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #33 (Valid, RSA cert, EC CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_PKCS1_V15:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server4.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server4.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #34 (Valid, EC cert, EC CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #35 (Revoked, EC CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #36 (Valid, EC CA, SHA1 Digest)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5-sha1.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5-sha1.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #37 (Valid, EC CA, SHA224 Digest)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5-sha224.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5-sha224.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #38 (Valid, EC CA, SHA384 Digest)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_SHA512_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5-sha384.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5-sha384.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #39 (Valid, EC CA, SHA512 Digest)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_SHA256_C:MBEDTLS_SHA512_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5-sha512.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5-sha512.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #40 (Valid, depth 0, RSA, CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/test-ca.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/test-ca.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #41 (Valid, depth 0, EC, CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA256_C
-x509_verify:"data_files/test-ca2.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/test-ca2.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #42 (Depth 0, not CA, RSA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C
-x509_verify:"data_files/server2.crt":"data_files/server2.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server2.crt":"data_files/server2.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #43 (Depth 0, not CA, EC)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/server5.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/server5.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #44 (Corrupted signature, EC)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5-badsign.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server5-badsign.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #45 (Corrupted signature, RSA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C
-x509_verify:"data_files/server2-badsign.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server2-badsign.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #46 (Valid, depth 2, EC-RSA-EC)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C
-x509_verify:"data_files/server7_int-ca.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server7_int-ca.crt":"data_files/test-ca2.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #47 (Untrusted, depth 2, EC-RSA-EC)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server7_int-ca.crt":"data_files/test-ca.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server7_int-ca.crt":"data_files/test-ca.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #48 (Missing intermediate CA, EC-RSA-EC)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_PKCS1_V15:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server7.crt":"data_files/test-ca.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server7.crt":"data_files/test-ca.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #49 (Valid, depth 2, RSA-EC-RSA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server8_int-ca2.crt":"data_files/test-ca.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server8_int-ca2.crt":"data_files/test-ca.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #50 (Valid, multiple CAs)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server2.crt":"data_files/test-ca_cat12.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server2.crt":"data_files/test-ca_cat12.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #51 (Valid, multiple CAs, reverse order)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server2.crt":"data_files/test-ca_cat21.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server2.crt":"data_files/test-ca_cat21.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #52 (CA keyUsage valid)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crt_crl.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crt_crl.crt":"data_files/crl-ec-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #53 (CA keyUsage missing cRLSign)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_X509_CHECK_KEY_USAGE:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crt.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crt.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #54 (CA keyUsage missing cRLSign, no CRL)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crt.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crt.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #55 (CA keyUsage missing keyCertSign)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_X509_CHECK_KEY_USAGE:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crl.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-crl.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #56 (CA keyUsage plain wrong)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_X509_CHECK_KEY_USAGE:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED
-x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-ds.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2.ku-ds.crt":"data_files/crl-ec-sha256.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #57 (Valid, RSASSA-PSS, SHA-1)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #58 (Valid, RSASSA-PSS, SHA-224)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-sha224.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha224.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha224.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha224.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #59 (Valid, RSASSA-PSS, SHA-256)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-sha256.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha256.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha256.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha256.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #60 (Valid, RSASSA-PSS, SHA-384)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA512_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-sha384.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha384.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha384.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha384.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #61 (Valid, RSASSA-PSS, SHA-512)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA512_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-sha512.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha512.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-sha512.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha512.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #62 (Revoked, RSASSA-PSS, SHA-1)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #63 (Revoked, RSASSA-PSS, SHA-1, CRL badsign)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1-badsign.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server9.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1-badsign.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCRL_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #64 (Valid, RSASSA-PSS, SHA-1, not top)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-with-ca.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-with-ca.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #65 (RSASSA-PSS, SHA1, bad cert signature)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-badsign.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server9-badsign.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #66 (RSASSA-PSS, SHA1, no RSA CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA256_C
-x509_verify:"data_files/server9.crt":"data_files/test-ca2.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server9.crt":"data_files/test-ca2.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #67 (Valid, RSASSA-PSS, all defaults)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-defaults.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server9-defaults.crt":"data_files/test-ca.crt":"data_files/crl-rsa-pss-sha1.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #68 (RSASSA-PSS, wrong salt_len)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-bad-saltlen.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server9-bad-saltlen.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #69 (RSASSA-PSS, wrong mgf_hash)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server9-bad-mgfhash.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server9-bad-mgfhash.crt":"data_files/test-ca.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #70 (v1 trusted CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server1-v1.crt":"data_files/test-ca-v1.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server1-v1.crt":"data_files/test-ca-v1.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #71 (v1 trusted CA, other)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server2-v1.crt":"data_files/server1-v1.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server2-v1.crt":"data_files/server1-v1.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #72 (v1 chain)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server2-v1-chain.crt":"data_files/test-ca-v1.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server2-v1-chain.crt":"data_files/test-ca-v1.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #73 (selfsigned trusted without CA bit)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5-selfsigned.crt":"data_files/server5-selfsigned.crt":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5-selfsigned.crt":"data_files/server5-selfsigned.crt":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #74 (signed by selfsigned trusted without CA bit)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6-ss-child.crt":"data_files/server5-selfsigned.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"NULL"
+x509_verify:"data_files/server6-ss-child.crt":"data_files/server5-selfsigned.crt":"data_files/crl.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_NOT_TRUSTED:"compat":"NULL"
 
 X509 Certificate verification #75 (encoding mismatch)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/enco-cert-utf8str.pem":"data_files/enco-ca-prstr.pem":"data_files/crl.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/enco-cert-utf8str.pem":"data_files/enco-ca-prstr.pem":"data_files/crl.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #76 (multiple CRLs, not revoked)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ec-rsa.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ec-rsa.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #77 (multiple CRLs, revoked)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ec-rsa.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ec-rsa.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #78 (multiple CRLs, revoked by second)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_rsa-ec.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_rsa-ec.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #79 (multiple CRLs, revoked by future)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server6.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ecfut-rsa.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED|MBEDTLS_X509_BADCRL_FUTURE:"NULL"
+x509_verify:"data_files/server6.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ecfut-rsa.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED|MBEDTLS_X509_BADCRL_FUTURE:"compat":"NULL"
 
 X509 Certificate verification #80 (multiple CRLs, first future, revoked by second)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/server1.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ecfut-rsa.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"NULL"
+x509_verify:"data_files/server1.crt":"data_files/test-ca_cat12.crt":"data_files/crl_cat_ecfut-rsa.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_REVOKED:"compat":"NULL"
 
 X509 Certificate verification #81 (multiple CRLs, none relevant)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_verify:"data_files/enco-cert-utf8str.pem":"data_files/enco-ca-prstr.pem":"data_files/crl_cat_rsa-ec.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/enco-cert-utf8str.pem":"data_files/enco-ca-prstr.pem":"data_files/crl_cat_rsa-ec.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #82 (Not yet valid CA and valid CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-future-present.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-future-present.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #83 (valid CA and Not yet valid CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-present-future.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-present-future.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #84 (valid CA and Not yet valid CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-present-past.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-present-past.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #85 (Not yet valid CA and valid CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-past-present.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-past-present.crt":"data_files/crl-ec-sha1.pem":"NULL":0:0:"compat":"NULL"
 
 X509 Certificate verification #86 (Not yet valid CA and invalid CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-future-invalid.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_FUTURE:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-future-invalid.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_FUTURE:"compat":"NULL"
 
 X509 Certificate verification #87 (Expired CA and invalid CA)
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECP_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SHA1_C:MBEDTLS_SHA256_C
-x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-past-invalid.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_EXPIRED:"NULL"
+x509_verify:"data_files/server5.crt":"data_files/test-ca2_cat-past-invalid.crt":"data_files/crl-ec-sha1.pem":"NULL":MBEDTLS_ERR_X509_CERT_VERIFY_FAILED:MBEDTLS_X509_BADCERT_EXPIRED:"compat":"NULL"
 
 X509 Certificate verification callback: trusted EE cert
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index 5eec72a..a9f7cee 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -7,6 +7,8 @@
 #include "mbedtls/oid.h"
 #include "mbedtls/base64.h"
 
+/* Profile for backward compatibility. Allows SHA-1, unlike the default
+   profile. */
 const mbedtls_x509_crt_profile compat_profile =
 {
     MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
@@ -221,6 +223,7 @@
 /* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_X509_CRL_PARSE_C */
 void x509_verify( char *crt_file, char *ca_file, char *crl_file,
                   char *cn_name_str, int result, int flags_result,
+                  char *profile_str,
                   char *verify_callback )
 {
     mbedtls_x509_crt   crt;
@@ -230,6 +233,7 @@
     int         res;
     int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *) = NULL;
     char *      cn_name = NULL;
+    const mbedtls_x509_crt_profile *profile;
 
     mbedtls_x509_crt_init( &crt );
     mbedtls_x509_crt_init( &ca );
@@ -238,6 +242,13 @@
     if( strcmp( cn_name_str, "NULL" ) != 0 )
         cn_name = cn_name_str;
 
+    if( strcmp( profile_str, "default" ) == 0 )
+        profile = &mbedtls_x509_crt_profile_default;
+    else if( strcmp( profile_str, "compat" ) == 0 )
+        profile = &compat_profile;
+    else
+        TEST_ASSERT( "Unknown algorithm profile" == 0 );
+
     if( strcmp( verify_callback, "NULL" ) == 0 )
         f_vrfy = NULL;
     else if( strcmp( verify_callback, "verify_none" ) == 0 )
@@ -251,7 +262,7 @@
     TEST_ASSERT( mbedtls_x509_crt_parse_file( &ca, ca_file ) == 0 );
     TEST_ASSERT( mbedtls_x509_crl_parse_file( &crl, crl_file ) == 0 );
 
-    res = mbedtls_x509_crt_verify_with_profile( &crt, &ca, &crl, &compat_profile, cn_name, &flags, f_vrfy, NULL );
+    res = mbedtls_x509_crt_verify_with_profile( &crt, &ca, &crl, profile, cn_name, &flags, f_vrfy, NULL );
 
     TEST_ASSERT( res == ( result ) );
     TEST_ASSERT( flags == (uint32_t)( flags_result ) );
@@ -280,8 +291,10 @@
     TEST_ASSERT( mbedtls_x509_crt_parse_file( &crt, crt_file ) == 0 );
     TEST_ASSERT( mbedtls_x509_crt_parse_file( &ca, ca_file ) == 0 );
 
-    ret = mbedtls_x509_crt_verify( &crt, &ca, NULL, NULL, &flags,
-                                   verify_print, &vrfy_ctx );
+    ret = mbedtls_x509_crt_verify_with_profile( &crt, &ca, NULL,
+                                                &compat_profile,
+                                                NULL, &flags,
+                                                verify_print, &vrfy_ctx );
 
     TEST_ASSERT( ret == exp_ret );
     TEST_ASSERT( strcmp( vrfy_ctx.buf, exp_vrfy_out ) == 0 );
diff --git a/visualc/VS2010/mbedTLS.vcxproj b/visualc/VS2010/mbedTLS.vcxproj
index 0d24644..65730cd 100644
--- a/visualc/VS2010/mbedTLS.vcxproj
+++ b/visualc/VS2010/mbedTLS.vcxproj
@@ -172,6 +172,7 @@
     <ClInclude Include="..\..\include\mbedtls\ecdsa.h" />
     <ClInclude Include="..\..\include\mbedtls\ecjpake.h" />
     <ClInclude Include="..\..\include\mbedtls\ecp.h" />
+    <ClInclude Include="..\..\include\mbedtls\ecp_internal.h" />
     <ClInclude Include="..\..\include\mbedtls\entropy.h" />
     <ClInclude Include="..\..\include\mbedtls\entropy_poll.h" />
     <ClInclude Include="..\..\include\mbedtls\error.h" />