diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ade1d4..4dbe76e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,9 @@
 cmake_minimum_required(VERSION 2.6)
-project("mbed TLS" C)
+if(TEST_CPP)
+    project("mbed TLS" C CXX)
+else()
+    project("mbed TLS" C)
+endif()
 
 option(USE_PKCS11_HELPER_LIBRARY "Build mbed TLS with the pkcs11-helper library." OFF)
 option(ENABLE_ZLIB_SUPPORT "Build mbed TLS with zlib library." OFF)
diff --git a/ChangeLog b/ChangeLog
index c0c4cd2..54e1363 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,8 +4,16 @@
 
 Features
    * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time
-   authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed by
-   Daniel King (#485).
+     authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed
+     by Daniel King (#485).
+   * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905.
+   * Add platform support for the Haiku OS. (https://www.haiku-os.org).
+     Contributed by Augustin Cavalier.
+   * Make the receive and transmit buffers independent sizes, for situations
+     where the outgoing buffer can be fixed at a smaller size than the incoming
+     buffer, which can save some RAM. If buffer lengths are kept equal, there
+     is no functional difference. Contributed by Angus Gratton, and also
+     independently contributed again by Paul Sokolovsky.
 
 Bugfix
    * Fix the key_app_writer example which was writing a leading zero byte which
@@ -18,6 +26,31 @@
      return value. Found by @davidwu2000. #839
    * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber,
      Philippe Antoine. Fixes #1623.
+   * Remove unused headers included in x509.c. Found by Chris Hanson and fixed
+     by Brendan Shanks. Part of a fix for #992.
+   * Fix compilation error when MBEDTLS_ARC4_C is disabled and
+     MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719.
+   * Fix the inline assembly for the MPI multiply helper function for i386 and
+     i386 with SSE2. Found by László Langó. Fixes #1550
+   * Fix namespacing in header files. Remove the `mbedtls` namespacing in
+     the `#include` in the header files. Resolves #857
+   * Fix compiler warning of 'use before initialisation' in
+     mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid
+     Drozd. #1098
+   * Fix decryption for zero length messages (which contain all padding) when a
+     CBC based ciphersuite is used together with Encrypt-then-MAC. Previously,
+     such a message was wrongly reported as an invalid record and therefore lead
+     to the connection being terminated. Seen most often with OpenSSL using
+     TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix
+     contributed by Espressif Systems. Fixes #1632
+   * Fail when receiving a TLS alert message with an invalid length, or invalid
+     zero-length messages when using TLS 1.2. Contributed by Espressif Systems.
+   * Fix ssl_client2 example to send application data with 0-length content
+     when the request_size argument is set to 0 as stated in the documentation.
+     Fixes #1833.
+   * Change the default behaviour of mbedtls_hkdf_extract() to return an error
+     when calling with a NULL salt and non-zero salt_len. Contributed by
+     Brian J Murray
    * Correct the documentation for `mbedtls_ssl_get_session()`.
      This API has deep copy of the session, and the peer
      certificate is not lost. Fixes #926.
@@ -48,6 +81,8 @@
    * Fix compilation warnings with IAR toolchain, on 32 bit platform.
      Reported by rahmanih in #683
    * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552.
+   * Added length checks to some TLS parsing functions. Found and fixed by
+     Philippe Antoine from Catena cyber. #1663.
 
 Changes
    * Changed CMake defaults for IAR to treat all compiler warnings as errors.
diff --git a/configs/config-ccm-psk-tls1_2.h b/configs/config-ccm-psk-tls1_2.h
index a783e6b..c9b58dd 100644
--- a/configs/config-ccm-psk-tls1_2.h
+++ b/configs/config-ccm-psk-tls1_2.h
@@ -81,7 +81,7 @@
  * both ends of the connection!  (See comments in "mbedtls/ssl.h".)
  * The optimal size here depends on the typical size of records.
  */
-#define MBEDTLS_SSL_MAX_CONTENT_LEN             512
+#define MBEDTLS_SSL_MAX_CONTENT_LEN             1024
 
 #include "mbedtls/check_config.h"
 
diff --git a/include/mbedtls/bn_mul.h b/include/mbedtls/bn_mul.h
index f4b2b56..b587317 100644
--- a/include/mbedtls/bn_mul.h
+++ b/include/mbedtls/bn_mul.h
@@ -49,7 +49,14 @@
 /* armcc5 --gnu defines __GNUC__ but doesn't support GNU's extended asm */
 #if defined(__GNUC__) && \
     ( !defined(__ARMCC_VERSION) || __ARMCC_VERSION >= 6000000 )
-#if defined(__i386__)
+
+/*
+ * Disable use of the i386 assembly code below if option -O0, to disable all
+ * compiler optimisations, is passed, detected with __OPTIMIZE__
+ * This is done as the number of registers used in the assembly code doesn't
+ * work with the -O0 option.
+ */
+#if defined(__i386__) && defined(__OPTIMIZE__)
 
 #define MULADDC_INIT                        \
     asm(                                    \
@@ -142,7 +149,7 @@
         "movl   %%esi, %3       \n\t"   \
         : "=m" (t), "=m" (c), "=m" (d), "=m" (s)        \
         : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b)   \
-        : "eax", "ecx", "edx", "esi", "edi"             \
+        : "eax", "ebx", "ecx", "edx", "esi", "edi"      \
     );
 
 #else
@@ -154,7 +161,7 @@
         "movl   %%esi, %3       \n\t"   \
         : "=m" (t), "=m" (c), "=m" (d), "=m" (s)        \
         : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b)   \
-        : "eax", "ecx", "edx", "esi", "edi"             \
+        : "eax", "ebx", "ecx", "edx", "esi", "edi"      \
     );
 #endif /* SSE2 */
 #endif /* i386 */
diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index a1f4738..ea0ce98 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -45,7 +45,7 @@
 #define MBEDTLS_CIPHER_MODE_WITH_PADDING
 #endif
 
-#if defined(MBEDTLS_ARC4_C)
+#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER)
 #define MBEDTLS_CIPHER_MODE_STREAM
 #endif
 
diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h
index 913c05f..a4fd552 100644
--- a/include/mbedtls/cmac.h
+++ b/include/mbedtls/cmac.h
@@ -28,7 +28,7 @@
 #ifndef MBEDTLS_CMAC_H
 #define MBEDTLS_CMAC_H
 
-#include "mbedtls/cipher.h"
+#include "cipher.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/mbedtls/compat-1.3.h b/include/mbedtls/compat-1.3.h
index 600a0f1..213b691 100644
--- a/include/mbedtls/compat-1.3.h
+++ b/include/mbedtls/compat-1.3.h
@@ -1378,7 +1378,8 @@
 #define SSL_ANTI_REPLAY_ENABLED MBEDTLS_SSL_ANTI_REPLAY_ENABLED
 #define SSL_ARC4_DISABLED MBEDTLS_SSL_ARC4_DISABLED
 #define SSL_ARC4_ENABLED MBEDTLS_SSL_ARC4_ENABLED
-#define SSL_BUFFER_LEN MBEDTLS_SSL_BUFFER_LEN
+#define SSL_BUFFER_LEN ( ( ( MBEDTLS_SSL_IN_BUFFER_LEN ) < ( MBEDTLS_SSL_OUT_BUFFER_LEN ) ) \
+                         ? ( MBEDTLS_SSL_IN_BUFFER_LEN ) : ( MBEDTLS_SSL_OUT_BUFFER_LEN ) )
 #define SSL_CACHE_DEFAULT_MAX_ENTRIES MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES
 #define SSL_CACHE_DEFAULT_TIMEOUT MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT
 #define SSL_CBC_RECORD_SPLITTING_DISABLED MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index e13026e..17208b5 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -2951,7 +2951,51 @@
 //#define MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES      50 /**< Maximum entries in cache */
 
 /* SSL options */
-//#define MBEDTLS_SSL_MAX_CONTENT_LEN             16384 /**< Maxium fragment length in bytes, determines the size of each of the two internal I/O buffers */
+
+/** \def MBEDTLS_SSL_MAX_CONTENT_LEN
+ *
+ * Maximum fragment length in bytes.
+ *
+ * Determines the size of both the incoming and outgoing TLS I/O buffers.
+ *
+ * Uncommenting MBEDTLS_SSL_IN_CONTENT_LEN and/or MBEDTLS_SSL_OUT_CONTENT_LEN
+ * will override this length by setting maximum incoming and/or outgoing
+ * fragment length, respectively.
+ */
+//#define MBEDTLS_SSL_MAX_CONTENT_LEN             16384
+
+/** \def MBEDTLS_SSL_IN_CONTENT_LEN
+ *
+ * Maximum incoming fragment length in bytes.
+ *
+ * Uncomment to set the size of the inward TLS buffer independently of the
+ * outward buffer.
+ */
+//#define MBEDTLS_SSL_IN_CONTENT_LEN              16384
+
+/** \def MBEDTLS_SSL_OUT_CONTENT_LEN
+ *
+ * Maximum outgoing fragment length in bytes.
+ *
+ * Uncomment to set the size of the outward TLS buffer independently of the
+ * inward buffer.
+ *
+ * It is possible to save RAM by setting a smaller outward buffer, while keeping
+ * the default inward 16384 byte buffer to conform to the TLS specification.
+ *
+ * The minimum required outward buffer size is determined by the handshake
+ * protocol's usage. Handshaking will fail if the outward buffer is too small.
+ * The specific size requirement depends on the configured ciphers and any
+ * certificate data which is sent during the handshake.
+ *
+ * For absolute minimum RAM usage, it's best to enable
+ * MBEDTLS_SSL_MAX_FRAGMENT_LENGTH and reduce MBEDTLS_SSL_MAX_CONTENT_LEN. This
+ * reduces both incoming and outgoing buffer sizes. However this is only
+ * guaranteed if the other end of the connection also supports the TLS
+ * max_fragment_len extension. Otherwise the connection may fail.
+ */
+//#define MBEDTLS_SSL_OUT_CONTENT_LEN             16384
+
 //#define MBEDTLS_SSL_DEFAULT_TICKET_LIFETIME     86400 /**< Lifetime of session tickets (if enabled) */
 //#define MBEDTLS_PSK_MAX_LEN               32 /**< Max size of TLS pre-shared keys, in bytes (default 256 bits) */
 //#define MBEDTLS_SSL_COOKIE_TIMEOUT        60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
@@ -3028,7 +3072,7 @@
 /* \} name SECTION: Customisation configuration options */
 
 /* Target and application specific configurations */
-//#define YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE "mbedtls/target_config.h"
+//#define YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE "target_config.h"
 
 #if defined(TARGET_LIKE_MBED) && defined(YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE)
 #include YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE
diff --git a/include/mbedtls/ctr_drbg.h b/include/mbedtls/ctr_drbg.h
index dcbc047..3835d72 100644
--- a/include/mbedtls/ctr_drbg.h
+++ b/include/mbedtls/ctr_drbg.h
@@ -36,7 +36,7 @@
 #include "aes.h"
 
 #if defined(MBEDTLS_THREADING_C)
-#include "mbedtls/threading.h"
+#include "threading.h"
 #endif
 
 #define MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED        -0x0034  /**< The entropy source failed. */
diff --git a/include/mbedtls/hmac_drbg.h b/include/mbedtls/hmac_drbg.h
index e0821cf..2608de8 100644
--- a/include/mbedtls/hmac_drbg.h
+++ b/include/mbedtls/hmac_drbg.h
@@ -27,7 +27,7 @@
 #include "md.h"
 
 #if defined(MBEDTLS_THREADING_C)
-#include "mbedtls/threading.h"
+#include "threading.h"
 #endif
 
 /*
diff --git a/include/mbedtls/net.h b/include/mbedtls/net.h
index 28ae821..6c13b53 100644
--- a/include/mbedtls/net.h
+++ b/include/mbedtls/net.h
@@ -1,7 +1,7 @@
 /**
  * \file net.h
  *
- * \brief Deprecated header file that includes mbedtls/net_sockets.h
+ * \brief Deprecated header file that includes net_sockets.h
  *
  * \deprecated Superseded by mbedtls/net_sockets.h
  */
@@ -25,7 +25,7 @@
  */
 
 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
-#include "mbedtls/net_sockets.h"
+#include "net_sockets.h"
 #if defined(MBEDTLS_DEPRECATED_WARNING)
 #warning "Deprecated header file: Superseded by mbedtls/net_sockets.h"
 #endif /* MBEDTLS_DEPRECATED_WARNING */
diff --git a/include/mbedtls/platform.h b/include/mbedtls/platform.h
index 9d9c529..624cc64 100644
--- a/include/mbedtls/platform.h
+++ b/include/mbedtls/platform.h
@@ -40,7 +40,7 @@
 #endif
 
 #if defined(MBEDTLS_HAVE_TIME)
-#include "mbedtls/platform_time.h"
+#include "platform_time.h"
 #endif
 
 #ifdef __cplusplus
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 8b6e049..2d511a8 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -62,7 +62,7 @@
 #endif
 
 #if defined(MBEDTLS_HAVE_TIME)
-#include "mbedtls/platform_time.h"
+#include "platform_time.h"
 #endif
 
 /*
@@ -220,7 +220,7 @@
 #endif
 
 /*
- * Maxium fragment length in bytes,
+ * Maximum fragment length in bytes,
  * determines the size of each of the two internal I/O buffers.
  *
  * Note: the RFC defines the default size of SSL / TLS messages. If you
@@ -234,6 +234,14 @@
 #define MBEDTLS_SSL_MAX_CONTENT_LEN         16384   /**< Size of the input / output buffer */
 #endif
 
+#if !defined(MBEDTLS_SSL_IN_CONTENT_LEN)
+#define MBEDTLS_SSL_IN_CONTENT_LEN MBEDTLS_SSL_MAX_CONTENT_LEN
+#endif
+
+#if !defined(MBEDTLS_SSL_OUT_CONTENT_LEN)
+#define MBEDTLS_SSL_OUT_CONTENT_LEN MBEDTLS_SSL_MAX_CONTENT_LEN
+#endif
+
 /* \} name SECTION: Module settings */
 
 /*
@@ -2418,7 +2426,8 @@
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
 /**
  * \brief          Set the maximum fragment length to emit and/or negotiate
- *                 (Default: MBEDTLS_SSL_MAX_CONTENT_LEN, usually 2^14 bytes)
+ *                 (Default: the smaller of MBEDTLS_SSL_IN_CONTENT_LEN and
+ *                 MBEDTLS_SSL_OUT_CONTENT_LEN, usually 2^14 bytes)
  *                 (Server: set maximum fragment length to emit,
  *                 usually negotiated by the client during handshake
  *                 (Client: set maximum fragment length to emit *and*
diff --git a/include/mbedtls/ssl_ciphersuites.h b/include/mbedtls/ssl_ciphersuites.h
index 7d5eba0..cda8b48 100644
--- a/include/mbedtls/ssl_ciphersuites.h
+++ b/include/mbedtls/ssl_ciphersuites.h
@@ -271,6 +271,15 @@
 
 #define MBEDTLS_TLS_ECJPAKE_WITH_AES_128_CCM_8          0xC0FF  /**< experimental */
 
+/* RFC 7905 */
+#define MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   0xCCA8 /**< TLS 1.2 */
+#define MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 0xCCA9 /**< TLS 1.2 */
+#define MBEDTLS_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256     0xCCAA /**< TLS 1.2 */
+#define MBEDTLS_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256         0xCCAB /**< TLS 1.2 */
+#define MBEDTLS_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256   0xCCAC /**< TLS 1.2 */
+#define MBEDTLS_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256     0xCCAD /**< TLS 1.2 */
+#define MBEDTLS_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256     0xCCAE /**< TLS 1.2 */
+
 /* Reminder: update mbedtls_ssl_premaster_secret when adding a new key exchange.
  * Reminder: update MBEDTLS_KEY_EXCHANGE__xxx below
  */
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index f48fe90..d214703 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -143,32 +143,73 @@
 #define MBEDTLS_SSL_PADDING_ADD              0
 #endif
 
-#define MBEDTLS_SSL_PAYLOAD_LEN ( MBEDTLS_SSL_MAX_CONTENT_LEN    \
-                        + MBEDTLS_SSL_COMPRESSION_ADD            \
-                        + MBEDTLS_MAX_IV_LENGTH                  \
-                        + MBEDTLS_SSL_MAC_ADD                    \
-                        + MBEDTLS_SSL_PADDING_ADD                \
-                        )
+#define MBEDTLS_SSL_PAYLOAD_OVERHEAD ( MBEDTLS_SSL_COMPRESSION_ADD +    \
+                                       MBEDTLS_MAX_IV_LENGTH +          \
+                                       MBEDTLS_SSL_MAC_ADD +            \
+                                       MBEDTLS_SSL_PADDING_ADD          \
+                                       )
+
+#define MBEDTLS_SSL_IN_PAYLOAD_LEN ( MBEDTLS_SSL_PAYLOAD_OVERHEAD + \
+                                     ( MBEDTLS_SSL_IN_CONTENT_LEN ) )
+
+#define MBEDTLS_SSL_OUT_PAYLOAD_LEN ( MBEDTLS_SSL_PAYLOAD_OVERHEAD + \
+                                      ( MBEDTLS_SSL_OUT_CONTENT_LEN ) )
+
+/* Maximum length we can advertise as our max content length for
+   RFC 6066 max_fragment_length extension negotiation purposes
+   (the lesser of both sizes, if they are unequal.)
+ */
+#define MBEDTLS_TLS_EXT_ADV_CONTENT_LEN (                            \
+        (MBEDTLS_SSL_IN_CONTENT_LEN > MBEDTLS_SSL_OUT_CONTENT_LEN)   \
+        ? ( MBEDTLS_SSL_OUT_CONTENT_LEN )                            \
+        : ( MBEDTLS_SSL_IN_CONTENT_LEN )                             \
+        )
 
 /*
  * Check that we obey the standard's message size bounds
  */
 
 #if MBEDTLS_SSL_MAX_CONTENT_LEN > 16384
-#error Bad configuration - record content too large.
+#error "Bad configuration - record content too large."
 #endif
 
-#if MBEDTLS_SSL_PAYLOAD_LEN > 16384 + 2048
-#error Bad configuration - protected record payload too large.
+#if MBEDTLS_SSL_IN_CONTENT_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN
+#error "Bad configuration - incoming record content should not be larger than MBEDTLS_SSL_MAX_CONTENT_LEN."
 #endif
 
+#if MBEDTLS_SSL_OUT_CONTENT_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN
+#error "Bad configuration - outgoing record content should not be larger than MBEDTLS_SSL_MAX_CONTENT_LEN."
+#endif
+
+#if MBEDTLS_SSL_IN_PAYLOAD_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN + 2048
+#error "Bad configuration - incoming protected record payload too large."
+#endif
+
+#if MBEDTLS_SSL_OUT_PAYLOAD_LEN > MBEDTLS_SSL_MAX_CONTENT_LEN + 2048
+#error "Bad configuration - outgoing protected record payload too large."
+#endif
+
+/* Calculate buffer sizes */
+
 /* Note: Even though the TLS record header is only 5 bytes
    long, we're internally using 8 bytes to store the
    implicit sequence number. */
 #define MBEDTLS_SSL_HEADER_LEN 13
 
-#define MBEDTLS_SSL_BUFFER_LEN  \
-    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_PAYLOAD_LEN ) )
+#define MBEDTLS_SSL_IN_BUFFER_LEN  \
+    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_IN_PAYLOAD_LEN ) )
+
+#define MBEDTLS_SSL_OUT_BUFFER_LEN  \
+    ( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_OUT_PAYLOAD_LEN ) )
+
+#ifdef MBEDTLS_ZLIB_SUPPORT
+/* Compression buffer holds both IN and OUT buffers, so should be size of the larger */
+#define MBEDTLS_SSL_COMPRESS_BUFFER_LEN (                               \
+        ( MBEDTLS_SSL_IN_BUFFER_LEN > MBEDTLS_SSL_OUT_BUFFER_LEN )      \
+        ? MBEDTLS_SSL_IN_BUFFER_LEN                                     \
+        : MBEDTLS_SSL_OUT_BUFFER_LEN                                    \
+        )
+#endif
 
 /*
  * TLS extension flags (for extensions with outgoing ServerHello content
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 75cc9a0..4aba062 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -108,6 +108,10 @@
     SET(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> -no_warning_for_no_symbols -c <TARGET>")
 endif()
 
+if(HAIKU)
+    set(libs ${libs} network)
+endif(HAIKU)
+
 if(USE_PKCS11_HELPER_LIBRARY)
     set(libs ${libs} pkcs11-helper)
 endif(USE_PKCS11_HELPER_LIBRARY)
diff --git a/library/cipher.c b/library/cipher.c
index a913913..7ae6c4a 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -65,11 +65,6 @@
 #define mbedtls_free   free
 #endif
 
-#if defined(MBEDTLS_ARC4_C) || defined(MBEDTLS_CIPHER_NULL_CIPHER)
-#define MBEDTLS_CIPHER_MODE_STREAM
-#endif
-
-
 #if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
 /* Compare the contents of two buffers in constant time.
  * Returns 0 if the contents are bitwise identical, otherwise returns
diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index fd96258..308c53c 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -45,7 +45,8 @@
 #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
 
 #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
-    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__)
+    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__) && \
+    !defined(__HAIKU__)
 #error "Platform entropy sources only work on Unix and Windows, see MBEDTLS_NO_PLATFORM_ENTROPY in config.h"
 #endif
 
diff --git a/library/hkdf.c b/library/hkdf.c
index d2e55e8..82d8a42 100644
--- a/library/hkdf.c
+++ b/library/hkdf.c
@@ -62,6 +62,11 @@
     {
         size_t hash_len;
 
+        if( salt_len != 0 )
+        {
+            return MBEDTLS_ERR_HKDF_BAD_INPUT_DATA;
+        }
+
         hash_len = mbedtls_md_get_size( md );
 
         if( hash_len == 0 )
@@ -114,6 +119,10 @@
         n++;
     }
 
+    /*
+     * Per RFC 5869 Section 2.3, okm_len must not exceed
+     * 255 times the hash length
+     */
     if( n > 255 )
     {
         return( MBEDTLS_ERR_HKDF_BAD_INPUT_DATA );
@@ -126,7 +135,10 @@
         goto exit;
     }
 
-    /* RFC 5869 Section 2.3. */
+    /*
+     * Compute T = T(1) | T(2) | T(3) | ... | T(N)
+     * Where T(N) is defined in RFC 5869 Section 2.3
+     */
     for( i = 1; i <= n; i++ )
     {
         size_t num_to_copy;
@@ -150,7 +162,7 @@
             goto exit;
         }
 
-        /* The constant concatenated to the end of each t(n) is a single octet.
+        /* The constant concatenated to the end of each T(n) is a single octet.
          * */
         ret = mbedtls_md_hmac_update( &ctx, &c, 1 );
         if( ret != 0 )
diff --git a/library/net_sockets.c b/library/net_sockets.c
index 202da01..e5efce0 100644
--- a/library/net_sockets.c
+++ b/library/net_sockets.c
@@ -28,7 +28,8 @@
 #if defined(MBEDTLS_NET_C)
 
 #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
-    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__)
+    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__) && \
+    !defined(__HAIKU__)
 #error "This module only works on Unix and Windows, see MBEDTLS_NET_C in config.h"
 #endif
 
diff --git a/library/pkparse.c b/library/pkparse.c
index ccb7f54..d6ac987 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -1261,7 +1261,6 @@
         return( ret );
 #endif /* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
 #else
-    ((void) ret);
     ((void) pwd);
     ((void) pwdlen);
 #endif /* MBEDTLS_PEM_PARSE_C */
diff --git a/library/ssl_ciphersuites.c b/library/ssl_ciphersuites.c
index 2e9a0fd..59cdc7a 100644
--- a/library/ssl_ciphersuites.c
+++ b/library/ssl_ciphersuites.c
@@ -47,7 +47,7 @@
  * 1. By key exchange:
  *    Forward-secure non-PSK > forward-secure PSK > ECJPAKE > other non-PSK > other PSK
  * 2. By key length and cipher:
- *    AES-256 > Camellia-256 > ARIA-256 > AES-128 > Camellia-128 > ARIA-128 > 3DES
+ *    ChaCha > AES-256 > Camellia-256 > ARIA-256 > AES-128 > Camellia-128 > ARIA-128 > 3DES
  * 3. By cipher mode when relevant GCM > CCM > CBC > CCM_8
  * 4. By hash function used when relevant
  * 5. By key exchange/auth again: EC > non-EC
@@ -57,6 +57,11 @@
 #if defined(MBEDTLS_SSL_CIPHERSUITES)
     MBEDTLS_SSL_CIPHERSUITES,
 #else
+    /* Chacha-Poly ephemeral suites */
+    MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+    MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
+    MBEDTLS_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+
     /* All AES-256 ephemeral suites */
     MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
     MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
@@ -127,6 +132,8 @@
     MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
 
     /* The PSK ephemeral suites */
+    MBEDTLS_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
+    MBEDTLS_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
     MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384,
     MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CCM,
     MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384,
@@ -227,6 +234,7 @@
     MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
 
     /* The RSA PSK suites */
+    MBEDTLS_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256,
     MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384,
     MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384,
     MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA,
@@ -246,6 +254,7 @@
     MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
 
     /* The PSK suites */
+    MBEDTLS_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256,
     MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384,
     MBEDTLS_TLS_PSK_WITH_AES_256_CCM,
     MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384,
@@ -312,6 +321,75 @@
 
 static const mbedtls_ssl_ciphersuite_t ciphersuite_definitions[] =
 {
+#if defined(MBEDTLS_CHACHAPOLY_C) && \
+    defined(MBEDTLS_SHA256_C) && \
+    defined(MBEDTLS_SSL_PROTO_TLS1_2)
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)
+    { MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-ECDHE-RSA-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_ECDHE_RSA,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
+    { MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-ECDHE-ECDSA-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
+    { MBEDTLS_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-DHE-RSA-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_DHE_RSA,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
+    { MBEDTLS_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-PSK-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_PSK,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
+    { MBEDTLS_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-ECDHE-PSK-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_ECDHE_PSK,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
+    { MBEDTLS_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-DHE-PSK-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_DHE_PSK,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
+    { MBEDTLS_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256,
+      "TLS-RSA-PSK-WITH-CHACHA20-POLY1305-SHA256",
+      MBEDTLS_CIPHER_CHACHA20_POLY1305, MBEDTLS_MD_SHA256,
+      MBEDTLS_KEY_EXCHANGE_RSA_PSK,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3,
+      0 },
+#endif
+#endif /* MBEDTLS_CHACHAPOLY_C &&
+          MBEDTLS_SHA256_C &&
+          MBEDTLS_SSL_PROTO_TLS1_2 */
 #if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
 #if defined(MBEDTLS_AES_C)
 #if defined(MBEDTLS_SHA1_C)
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index e537f9d..ba59c48 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -57,7 +57,7 @@
                                     size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     size_t hostname_len;
 
     *olen = 0;
@@ -127,7 +127,7 @@
                                          size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     *olen = 0;
 
@@ -171,7 +171,7 @@
                                                 size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     size_t sig_alg_len = 0;
     const int *md;
 #if defined(MBEDTLS_RSA_C) || defined(MBEDTLS_ECDSA_C)
@@ -256,7 +256,7 @@
                                                      size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     unsigned char *elliptic_curve_list = p + 6;
     size_t elliptic_curve_len = 0;
     const mbedtls_ecp_curve_info *info;
@@ -329,7 +329,7 @@
                                                    size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     *olen = 0;
 
@@ -362,7 +362,7 @@
 {
     int ret;
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     size_t kkpp_len;
 
     *olen = 0;
@@ -439,7 +439,7 @@
                                                size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     *olen = 0;
 
@@ -472,7 +472,7 @@
                                           unsigned char *buf, size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     *olen = 0;
 
@@ -504,7 +504,7 @@
                                        unsigned char *buf, size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     *olen = 0;
 
@@ -538,7 +538,7 @@
                                        unsigned char *buf, size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
 
     *olen = 0;
 
@@ -572,7 +572,7 @@
                                           unsigned char *buf, size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     size_t tlen = ssl->session_negotiate->ticket_len;
 
     *olen = 0;
@@ -616,7 +616,7 @@
                                 unsigned char *buf, size_t *olen )
 {
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     size_t alpnlen = 0;
     const char **cur;
 
@@ -1247,14 +1247,14 @@
     size_t list_size;
     const unsigned char *p;
 
-    list_size = buf[0];
-    if( list_size + 1 != len )
+    if( len == 0 || (size_t)( buf[0] + 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 );
     }
+    list_size = buf[0];
 
     p = buf + 1;
     while( list_size > 0 )
@@ -2117,7 +2117,7 @@
     size_t len_bytes = ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ? 0 : 2;
     unsigned char *p = ssl->handshake->premaster + pms_offset;
 
-    if( offset + len_bytes > MBEDTLS_SSL_MAX_CONTENT_LEN )
+    if( offset + len_bytes > MBEDTLS_SSL_OUT_CONTENT_LEN )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small for encrypted pms" ) );
         return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
@@ -2160,7 +2160,7 @@
     if( ( ret = mbedtls_pk_encrypt( &ssl->session_negotiate->peer_cert->pk,
                             p, ssl->handshake->pmslen,
                             ssl->out_msg + offset + len_bytes, olen,
-                            MBEDTLS_SSL_MAX_CONTENT_LEN - offset - len_bytes,
+                            MBEDTLS_SSL_OUT_CONTENT_LEN - offset - len_bytes,
                             ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_rsa_pkcs1_encrypt", ret );
@@ -2709,7 +2709,7 @@
      * therefore the buffer length at this point must be greater than that
      * regardless of the actual code path.
      */
-    if( ssl->in_hslen <= mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n )
+    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,
@@ -2926,7 +2926,7 @@
         i = 4;
         n = ssl->conf->psk_identity_len;
 
-        if( i + 2 + n > MBEDTLS_SSL_MAX_CONTENT_LEN )
+        if( i + 2 + n > MBEDTLS_SSL_OUT_CONTENT_LEN )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "psk identity too long or "
                                         "SSL buffer too short" ) );
@@ -2962,7 +2962,7 @@
              */
             n = ssl->handshake->dhm_ctx.len;
 
-            if( i + 2 + n > MBEDTLS_SSL_MAX_CONTENT_LEN )
+            if( i + 2 + n > MBEDTLS_SSL_OUT_CONTENT_LEN )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "psk identity or DHM size too long"
                                             " or SSL buffer too short" ) );
@@ -2991,7 +2991,7 @@
              * ClientECDiffieHellmanPublic public;
              */
             ret = mbedtls_ecdh_make_public( &ssl->handshake->ecdh_ctx, &n,
-                    &ssl->out_msg[i], MBEDTLS_SSL_MAX_CONTENT_LEN - i,
+                    &ssl->out_msg[i], MBEDTLS_SSL_OUT_CONTENT_LEN - i,
                     ssl->conf->f_rng, ssl->conf->p_rng );
             if( ret != 0 )
             {
@@ -3032,7 +3032,7 @@
         i = 4;
 
         ret = mbedtls_ecjpake_write_round_two( &ssl->handshake->ecjpake_ctx,
-                ssl->out_msg + i, MBEDTLS_SSL_MAX_CONTENT_LEN - i, &n,
+                ssl->out_msg + i, MBEDTLS_SSL_OUT_CONTENT_LEN - i, &n,
                 ssl->conf->f_rng, ssl->conf->p_rng );
         if( ret != 0 )
         {
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 0ccab58..52087ae 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -91,6 +91,13 @@
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "parse ServerName extension" ) );
 
+    if( len < 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 );
+    }
     servername_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
     if( servername_list_size + 2 != len )
     {
@@ -101,7 +108,7 @@
     }
 
     p = buf + 2;
-    while( servername_list_size > 0 )
+    while( servername_list_size > 2 )
     {
         hostname_len = ( ( p[1] << 8 ) | p[2] );
         if( hostname_len + 3 > servername_list_size )
@@ -205,6 +212,12 @@
     mbedtls_md_type_t md_cur;
     mbedtls_pk_type_t sig_cur;
 
+    if ( len < 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 );
+    }
     sig_alg_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
     if( sig_alg_list_size + 2 != len ||
         sig_alg_list_size % 2 != 0 )
@@ -273,6 +286,12 @@
     const unsigned char *p;
     const mbedtls_ecp_curve_info *curve_info, **curves;
 
+    if ( len < 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 );
+    }
     list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
     if( list_size + 2 != len ||
         list_size % 2 != 0 )
@@ -332,14 +351,14 @@
     size_t list_size;
     const unsigned char *p;
 
-    list_size = buf[0];
-    if( list_size + 1 != len )
+    if( len == 0 || (size_t)( buf[0] + 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 );
     }
+    list_size = buf[0];
 
     p = buf + 1;
     while( list_size > 0 )
@@ -1303,7 +1322,7 @@
     else
 #endif
     {
-        if( msg_len > MBEDTLS_SSL_MAX_CONTENT_LEN )
+        if( msg_len > MBEDTLS_SSL_IN_CONTENT_LEN )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
             return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
@@ -1656,10 +1675,16 @@
 
         while( ext_len != 0 )
         {
-            unsigned int ext_id   = ( ( ext[0] <<  8 )
-                                    | ( ext[1]       ) );
-            unsigned int ext_size = ( ( ext[2] <<  8 )
-                                    | ( ext[3]       ) );
+            unsigned int ext_id;
+            unsigned int ext_size;
+            if ( 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 );
+            }
+            ext_id   = ( ( ext[0] <<  8 ) | ( ext[1] ) );
+            ext_size = ( ( ext[2] <<  8 ) | ( ext[3] ) );
 
             if( ext_size + 4 > ext_len )
             {
@@ -2235,7 +2260,7 @@
 {
     int ret;
     unsigned char *p = buf;
-    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     size_t kkpp_len;
 
     *olen = 0;
@@ -2342,7 +2367,7 @@
     cookie_len_byte = p++;
 
     if( ( ret = ssl->conf->f_cookie_write( ssl->conf->p_cookie,
-                                     &p, ssl->out_buf + MBEDTLS_SSL_BUFFER_LEN,
+                                     &p, ssl->out_buf + MBEDTLS_SSL_OUT_BUFFER_LEN,
                                      ssl->cli_id, ssl->cli_id_len ) ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_RET( 1, "f_cookie_write", ret );
@@ -2638,7 +2663,7 @@
     size_t dn_size, total_dn_size; /* excluding length bytes */
     size_t ct_len, sa_len; /* including length bytes */
     unsigned char *buf, *p;
-    const unsigned char * const end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
+    const unsigned char * const end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
     const mbedtls_x509_crt *crt;
     int authmode;
 
@@ -2839,7 +2864,7 @@
      * ssl_write_server_key_exchange also takes care of incrementing
      * ssl->out_msglen. */
     unsigned char *sig_start = ssl->out_msg + ssl->out_msglen + 2;
-    size_t sig_max_len = ( ssl->out_buf + MBEDTLS_SSL_MAX_CONTENT_LEN
+    size_t sig_max_len = ( ssl->out_buf + MBEDTLS_SSL_OUT_CONTENT_LEN
                            - sig_start );
     int ret = ssl->conf->f_async_resume( ssl,
                                          sig_start, signature_len, sig_max_len );
@@ -2893,7 +2918,7 @@
         ret = mbedtls_ecjpake_write_round_two(
             &ssl->handshake->ecjpake_ctx,
             ssl->out_msg + ssl->out_msglen,
-            MBEDTLS_SSL_MAX_CONTENT_LEN - ssl->out_msglen, &len,
+            MBEDTLS_SSL_OUT_CONTENT_LEN - ssl->out_msglen, &len,
             ssl->conf->f_rng, ssl->conf->p_rng );
         if( ret != 0 )
         {
@@ -3020,7 +3045,7 @@
         if( ( ret = mbedtls_ecdh_make_params(
                   &ssl->handshake->ecdh_ctx, &len,
                   ssl->out_msg + ssl->out_msglen,
-                  MBEDTLS_SSL_MAX_CONTENT_LEN - ssl->out_msglen,
+                  MBEDTLS_SSL_OUT_CONTENT_LEN - ssl->out_msglen,
                   ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
         {
             MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_make_params", ret );
@@ -3437,6 +3462,10 @@
     defined(MBEDTLS_SSL_PROTO_TLS1_2)
     if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
     {
+        if ( p + 2 > end ) {
+            MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
+            return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
+        }
         if( *p++ != ( ( len >> 8 ) & 0xFF ) ||
             *p++ != ( ( len      ) & 0xFF ) )
         {
@@ -4171,7 +4200,7 @@
     if( ( ret = ssl->conf->f_ticket_write( ssl->conf->p_ticket,
                                 ssl->session_negotiate,
                                 ssl->out_msg + 10,
-                                ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN,
+                                ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN,
                                 &tlen, &lifetime ) ) != 0 )
     {
         MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_ticket_write", ret );
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index bc63c6e..f1856e2 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -141,14 +141,24 @@
  *    } MaxFragmentLength;
  * and we add 0 -> extension unused
  */
-static unsigned int mfl_code_to_length[MBEDTLS_SSL_MAX_FRAG_LEN_INVALID] =
+static unsigned int ssl_mfl_code_to_length( int mfl )
 {
-    MBEDTLS_SSL_MAX_CONTENT_LEN,    /* MBEDTLS_SSL_MAX_FRAG_LEN_NONE */
-    512,                    /* MBEDTLS_SSL_MAX_FRAG_LEN_512  */
-    1024,                   /* MBEDTLS_SSL_MAX_FRAG_LEN_1024 */
-    2048,                   /* MBEDTLS_SSL_MAX_FRAG_LEN_2048 */
-    4096,                   /* MBEDTLS_SSL_MAX_FRAG_LEN_4096 */
-};
+    switch( mfl )
+    {
+    case MBEDTLS_SSL_MAX_FRAG_LEN_NONE:
+        return ( MBEDTLS_TLS_EXT_ADV_CONTENT_LEN );
+    case MBEDTLS_SSL_MAX_FRAG_LEN_512:
+        return 512;
+    case MBEDTLS_SSL_MAX_FRAG_LEN_1024:
+        return 1024;
+    case MBEDTLS_SSL_MAX_FRAG_LEN_2048:
+        return 2048;
+    case MBEDTLS_SSL_MAX_FRAG_LEN_4096:
+        return 4096;
+    default:
+        return ( MBEDTLS_TLS_EXT_ADV_CONTENT_LEN );
+    }
+}
 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
 
 #if defined(MBEDTLS_SSL_CLI_C)
@@ -688,18 +698,32 @@
     transform->keylen = cipher_info->key_bitlen / 8;
 
     if( cipher_info->mode == MBEDTLS_MODE_GCM ||
-        cipher_info->mode == MBEDTLS_MODE_CCM )
+        cipher_info->mode == MBEDTLS_MODE_CCM ||
+        cipher_info->mode == MBEDTLS_MODE_CHACHAPOLY )
     {
+        size_t taglen, explicit_ivlen;
+
         transform->maclen = 0;
         mac_key_len = 0;
 
+        /* All modes haves 96-bit IVs;
+         * GCM and CCM has 4 implicit and 8 explicit bytes
+         * ChachaPoly has all 12 bytes implicit
+         */
         transform->ivlen = 12;
-        transform->fixed_ivlen = 4;
+        if( cipher_info->mode == MBEDTLS_MODE_CHACHAPOLY )
+            transform->fixed_ivlen = 12;
+        else
+            transform->fixed_ivlen = 4;
 
-        /* Minimum length is expicit IV + tag */
-        transform->minlen = transform->ivlen - transform->fixed_ivlen
-                            + ( transform->ciphersuite_info->flags &
-                                MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16 );
+        /* All modes have 128-bit tags, except CCM_8 (ciphersuite flag) */
+        taglen = transform->ciphersuite_info->flags &
+                  MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
+
+
+        /* Minimum length of encrypted record */
+        explicit_ivlen = transform->ivlen - transform->fixed_ivlen;
+        transform->minlen = explicit_ivlen + taglen;
     }
     else
     {
@@ -956,11 +980,11 @@
         if( ssl->compress_buf == NULL )
         {
             MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) );
-            ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_BUFFER_LEN );
+            ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_COMPRESS_BUFFER_LEN );
             if( ssl->compress_buf == NULL )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
-                                    MBEDTLS_SSL_BUFFER_LEN ) );
+                                    MBEDTLS_SSL_COMPRESS_BUFFER_LEN ) );
                 return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
             }
         }
@@ -1151,6 +1175,9 @@
          * other_secret already set by the ClientKeyExchange message,
          * and is 48 bytes long
          */
+        if( end - p < 2 )
+            return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+
         *p++ = 0;
         *p++ = 48;
         p += 48;
@@ -1297,11 +1324,11 @@
     MBEDTLS_SSL_DEBUG_BUF( 4, "before encrypt: output payload",
                       ssl->out_msg, ssl->out_msglen );
 
-    if( ssl->out_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
+    if( ssl->out_msglen > MBEDTLS_SSL_OUT_CONTENT_LEN )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "Record content %u too large, maximum %d",
                                     (unsigned) ssl->out_msglen,
-                                    MBEDTLS_SSL_MAX_CONTENT_LEN ) );
+                                    MBEDTLS_SSL_OUT_CONTENT_LEN ) );
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
 
@@ -1394,17 +1421,26 @@
     }
     else
 #endif /* MBEDTLS_ARC4_C || MBEDTLS_CIPHER_NULL_CIPHER */
-#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CCM_C)
+#if defined(MBEDTLS_GCM_C) || \
+    defined(MBEDTLS_CCM_C) || \
+    defined(MBEDTLS_CHACHAPOLY_C)
     if( mode == MBEDTLS_MODE_GCM ||
-        mode == MBEDTLS_MODE_CCM )
+        mode == MBEDTLS_MODE_CCM ||
+        mode == MBEDTLS_MODE_CHACHAPOLY )
     {
         int ret;
         size_t enc_msglen, olen;
         unsigned char *enc_msg;
         unsigned char add_data[13];
-        unsigned char taglen = ssl->transform_out->ciphersuite_info->flags &
+        unsigned char iv[12];
+        mbedtls_ssl_transform *transform = ssl->transform_out;
+        unsigned char taglen = transform->ciphersuite_info->flags &
                                MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
+        size_t explicit_ivlen = transform->ivlen - transform->fixed_ivlen;
 
+        /*
+         * Prepare additional authenticated data
+         */
         memcpy( add_data, ssl->out_ctr, 8 );
         add_data[8]  = ssl->out_msgtype;
         mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
@@ -1412,44 +1448,57 @@
         add_data[11] = ( ssl->out_msglen >> 8 ) & 0xFF;
         add_data[12] = ssl->out_msglen & 0xFF;
 
-        MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
-                       add_data, 13 );
+        MBEDTLS_SSL_DEBUG_BUF( 4, "additional data for AEAD", add_data, 13 );
 
         /*
          * Generate IV
          */
-        if( ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen != 8 )
+        if( transform->ivlen == 12 && transform->fixed_ivlen == 4 )
+        {
+            /* GCM and CCM: fixed || explicit (=seqnum) */
+            memcpy( iv, transform->iv_enc, transform->fixed_ivlen );
+            memcpy( iv + transform->fixed_ivlen, ssl->out_ctr, 8 );
+            memcpy( ssl->out_iv, ssl->out_ctr, 8 );
+
+        }
+        else if( transform->ivlen == 12 && transform->fixed_ivlen == 12 )
+        {
+            /* ChachaPoly: fixed XOR sequence number */
+            unsigned char i;
+
+            memcpy( iv, transform->iv_enc, transform->fixed_ivlen );
+
+            for( i = 0; i < 8; i++ )
+                iv[i+4] ^= ssl->out_ctr[i];
+        }
+        else
         {
             /* Reminder if we ever add an AEAD mode with a different size */
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
             return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
         }
 
-        memcpy( ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
-                             ssl->out_ctr, 8 );
-        memcpy( ssl->out_iv, ssl->out_ctr, 8 );
-
-        MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->out_iv,
-                ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
+        MBEDTLS_SSL_DEBUG_BUF( 4, "IV used (internal)",
+                                  iv, transform->ivlen );
+        MBEDTLS_SSL_DEBUG_BUF( 4, "IV used (transmitted)",
+                                  ssl->out_iv, explicit_ivlen );
 
         /*
-         * Fix pointer positions and message length with added IV
+         * Fix message length with added IV
          */
         enc_msg = ssl->out_msg;
         enc_msglen = ssl->out_msglen;
-        ssl->out_msglen += ssl->transform_out->ivlen -
-                           ssl->transform_out->fixed_ivlen;
+        ssl->out_msglen += explicit_ivlen;
 
         MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
-                            "including %d bytes of padding",
-                       ssl->out_msglen, 0 ) );
+                                    "including 0 bytes of padding",
+                                    ssl->out_msglen ) );
 
         /*
          * Encrypt and authenticate
          */
-        if( ( ret = mbedtls_cipher_auth_encrypt( &ssl->transform_out->cipher_ctx_enc,
-                                         ssl->transform_out->iv_enc,
-                                         ssl->transform_out->ivlen,
+        if( ( ret = mbedtls_cipher_auth_encrypt( &transform->cipher_ctx_enc,
+                                         iv, transform->ivlen,
                                          add_data, 13,
                                          enc_msg, enc_msglen,
                                          enc_msg, &olen,
@@ -1609,7 +1658,6 @@
 
 static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
 {
-    size_t i;
     mbedtls_cipher_mode_t mode;
     int auth_done = 0;
 #if defined(SSL_SOME_MODES_USE_MAC)
@@ -1659,20 +1707,27 @@
     }
     else
 #endif /* MBEDTLS_ARC4_C || MBEDTLS_CIPHER_NULL_CIPHER */
-#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CCM_C)
+#if defined(MBEDTLS_GCM_C) || \
+    defined(MBEDTLS_CCM_C) || \
+    defined(MBEDTLS_CHACHAPOLY_C)
     if( mode == MBEDTLS_MODE_GCM ||
-        mode == MBEDTLS_MODE_CCM )
+        mode == MBEDTLS_MODE_CCM ||
+        mode == MBEDTLS_MODE_CHACHAPOLY )
     {
         int ret;
         size_t dec_msglen, olen;
         unsigned char *dec_msg;
         unsigned char *dec_msg_result;
         unsigned char add_data[13];
-        unsigned char taglen = ssl->transform_in->ciphersuite_info->flags &
+        unsigned char iv[12];
+        mbedtls_ssl_transform *transform = ssl->transform_in;
+        unsigned char taglen = transform->ciphersuite_info->flags &
                                MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
-        size_t explicit_iv_len = ssl->transform_in->ivlen -
-                                 ssl->transform_in->fixed_ivlen;
+        size_t explicit_iv_len = transform->ivlen - transform->fixed_ivlen;
 
+        /*
+         * Compute and update sizes
+         */
         if( ssl->in_msglen < explicit_iv_len + taglen )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < explicit_iv_len (%d) "
@@ -1686,6 +1741,9 @@
         dec_msg_result = ssl->in_msg;
         ssl->in_msglen = dec_msglen;
 
+        /*
+         * Prepare additional authenticated data
+         */
         memcpy( add_data, ssl->in_ctr, 8 );
         add_data[8]  = ssl->in_msgtype;
         mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
@@ -1693,23 +1751,43 @@
         add_data[11] = ( ssl->in_msglen >> 8 ) & 0xFF;
         add_data[12] = ssl->in_msglen & 0xFF;
 
-        MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
-                       add_data, 13 );
+        MBEDTLS_SSL_DEBUG_BUF( 4, "additional data for AEAD", add_data, 13 );
 
-        memcpy( ssl->transform_in->iv_dec + ssl->transform_in->fixed_ivlen,
-                ssl->in_iv,
-                ssl->transform_in->ivlen - ssl->transform_in->fixed_ivlen );
+        /*
+         * Prepare IV
+         */
+        if( transform->ivlen == 12 && transform->fixed_ivlen == 4 )
+        {
+            /* GCM and CCM: fixed || explicit (transmitted) */
+            memcpy( iv, transform->iv_dec, transform->fixed_ivlen );
+            memcpy( iv + transform->fixed_ivlen, ssl->in_iv, 8 );
 
-        MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->transform_in->iv_dec,
-                                     ssl->transform_in->ivlen );
+        }
+        else if( transform->ivlen == 12 && transform->fixed_ivlen == 12 )
+        {
+            /* ChachaPoly: fixed XOR sequence number */
+            unsigned char i;
+
+            memcpy( iv, transform->iv_dec, transform->fixed_ivlen );
+
+            for( i = 0; i < 8; i++ )
+                iv[i+4] ^= ssl->in_ctr[i];
+        }
+        else
+        {
+            /* Reminder if we ever add an AEAD mode with a different size */
+            MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+            return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+        }
+
+        MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", iv, transform->ivlen );
         MBEDTLS_SSL_DEBUG_BUF( 4, "TAG used", dec_msg + dec_msglen, taglen );
 
         /*
          * Decrypt and authenticate
          */
         if( ( ret = mbedtls_cipher_auth_decrypt( &ssl->transform_in->cipher_ctx_dec,
-                                         ssl->transform_in->iv_dec,
-                                         ssl->transform_in->ivlen,
+                                         iv, transform->ivlen,
                                          add_data, 13,
                                          dec_msg, dec_msglen,
                                          dec_msg_result, &olen,
@@ -1827,6 +1905,7 @@
          */
         if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
         {
+            unsigned char i;
             dec_msglen -= ssl->transform_in->ivlen;
             ssl->in_msglen -= ssl->transform_in->ivlen;
 
@@ -1900,27 +1979,28 @@
              * and fake check up to 256 bytes of padding
              */
             size_t pad_count = 0, real_count = 1;
-            size_t padding_idx = ssl->in_msglen - padlen - 1;
+            size_t padding_idx = ssl->in_msglen - padlen;
+            size_t i;
 
             /*
              * Padding is guaranteed to be incorrect if:
-             *   1. padlen >= ssl->in_msglen
+             *   1. padlen > ssl->in_msglen
              *
-             *   2. padding_idx >= MBEDTLS_SSL_MAX_CONTENT_LEN +
+             *   2. padding_idx > MBEDTLS_SSL_IN_CONTENT_LEN +
              *                     ssl->transform_in->maclen
              *
              * In both cases we reset padding_idx to a safe value (0) to
              * prevent out-of-buffer reads.
              */
-            correct &= ( ssl->in_msglen >= padlen + 1 );
-            correct &= ( padding_idx < MBEDTLS_SSL_MAX_CONTENT_LEN +
+            correct &= ( padlen <= ssl->in_msglen );
+            correct &= ( padding_idx <= MBEDTLS_SSL_IN_CONTENT_LEN +
                                        ssl->transform_in->maclen );
 
             padding_idx *= correct;
 
-            for( i = 1; i <= 256; i++ )
+            for( i = 0; i < 256; i++ )
             {
-                real_count &= ( i <= padlen );
+                real_count &= ( i < padlen );
                 pad_count += real_count *
                              ( ssl->in_msg[padding_idx + i] == padlen - 1 );
             }
@@ -2053,6 +2133,16 @@
 
     if( ssl->in_msglen == 0 )
     {
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
+        if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3
+            && ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
+        {
+            /* TLS v1.2 explicitly disallows zero-length messages which are not application data */
+            MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid zero-length message type: %d", ssl->in_msgtype ) );
+            return( MBEDTLS_ERR_SSL_INVALID_RECORD );
+        }
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
+
         ssl->nb_zero++;
 
         /*
@@ -2077,6 +2167,7 @@
     else
 #endif
     {
+        unsigned char i;
         for( i = 8; i > ssl_ep_len( ssl ); i-- )
             if( ++ssl->in_ctr[i - 1] != 0 )
                 break;
@@ -2126,7 +2217,7 @@
     ssl->transform_out->ctx_deflate.next_in = msg_pre;
     ssl->transform_out->ctx_deflate.avail_in = len_pre;
     ssl->transform_out->ctx_deflate.next_out = msg_post;
-    ssl->transform_out->ctx_deflate.avail_out = MBEDTLS_SSL_BUFFER_LEN - bytes_written;
+    ssl->transform_out->ctx_deflate.avail_out = MBEDTLS_SSL_OUT_BUFFER_LEN - bytes_written;
 
     ret = deflate( &ssl->transform_out->ctx_deflate, Z_SYNC_FLUSH );
     if( ret != Z_OK )
@@ -2135,7 +2226,7 @@
         return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
     }
 
-    ssl->out_msglen = MBEDTLS_SSL_BUFFER_LEN -
+    ssl->out_msglen = MBEDTLS_SSL_OUT_BUFFER_LEN -
                       ssl->transform_out->ctx_deflate.avail_out - bytes_written;
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "after compression: msglen = %d, ",
@@ -2173,7 +2264,7 @@
     ssl->transform_in->ctx_inflate.next_in = msg_pre;
     ssl->transform_in->ctx_inflate.avail_in = len_pre;
     ssl->transform_in->ctx_inflate.next_out = msg_post;
-    ssl->transform_in->ctx_inflate.avail_out = MBEDTLS_SSL_BUFFER_LEN -
+    ssl->transform_in->ctx_inflate.avail_out = MBEDTLS_SSL_IN_BUFFER_LEN -
                                                header_bytes;
 
     ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
@@ -2183,7 +2274,7 @@
         return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
     }
 
-    ssl->in_msglen = MBEDTLS_SSL_BUFFER_LEN -
+    ssl->in_msglen = MBEDTLS_SSL_IN_BUFFER_LEN -
                      ssl->transform_in->ctx_inflate.avail_out - header_bytes;
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "after decompression: msglen = %d, ",
@@ -2258,7 +2349,7 @@
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
 
-    if( nb_want > MBEDTLS_SSL_BUFFER_LEN - (size_t)( ssl->in_hdr - ssl->in_buf ) )
+    if( nb_want > MBEDTLS_SSL_IN_BUFFER_LEN - (size_t)( ssl->in_hdr - ssl->in_buf ) )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "requesting more data than fits" ) );
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
@@ -2344,7 +2435,7 @@
         }
         else
         {
-            len = MBEDTLS_SSL_BUFFER_LEN - ( ssl->in_hdr - ssl->in_buf );
+            len = MBEDTLS_SSL_IN_BUFFER_LEN - ( ssl->in_hdr - ssl->in_buf );
 
             if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
                 timeout = ssl->handshake->retransmit_timeout;
@@ -2798,12 +2889,12 @@
         if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
         {
             /* Make room for the additional DTLS fields */
-            if( MBEDTLS_SSL_MAX_CONTENT_LEN - ssl->out_msglen < 8 )
+            if( MBEDTLS_SSL_OUT_CONTENT_LEN - ssl->out_msglen < 8 )
             {
                 MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS handshake message too large: "
                               "size %u, maximum %u",
                                (unsigned) ( ssl->in_hslen - 4 ),
-                               (unsigned) ( MBEDTLS_SSL_MAX_CONTENT_LEN - 12 ) ) );
+                               (unsigned) ( MBEDTLS_SSL_OUT_CONTENT_LEN - 12 ) ) );
                 return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
             }
 
@@ -3016,7 +3107,7 @@
         MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialize reassembly, total length = %d",
                             msg_len ) );
 
-        if( ssl->in_hslen > MBEDTLS_SSL_MAX_CONTENT_LEN )
+        if( ssl->in_hslen > MBEDTLS_SSL_IN_CONTENT_LEN )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too large" ) );
             return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
@@ -3120,7 +3211,7 @@
         ssl->next_record_offset = new_remain - ssl->in_hdr;
         ssl->in_left = ssl->next_record_offset + remain_len;
 
-        if( ssl->in_left > MBEDTLS_SSL_BUFFER_LEN -
+        if( ssl->in_left > MBEDTLS_SSL_IN_BUFFER_LEN -
                            (size_t)( ssl->in_hdr - ssl->in_buf ) )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "reassembled message too large for buffer" ) );
@@ -3496,7 +3587,7 @@
             ssl->conf->p_cookie,
             ssl->cli_id, ssl->cli_id_len,
             ssl->in_buf, ssl->in_left,
-            ssl->out_buf, MBEDTLS_SSL_MAX_CONTENT_LEN, &len );
+            ssl->out_buf, MBEDTLS_SSL_OUT_CONTENT_LEN, &len );
 
     MBEDTLS_SSL_DEBUG_RET( 2, "ssl_check_dtls_clihlo_cookie", ret );
 
@@ -3593,7 +3684,7 @@
     }
 
     /* Check length against the size of our buffer */
-    if( ssl->in_msglen > MBEDTLS_SSL_BUFFER_LEN
+    if( ssl->in_msglen > MBEDTLS_SSL_IN_BUFFER_LEN
                          - (size_t)( ssl->in_msg - ssl->in_buf ) )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
@@ -3687,7 +3778,7 @@
     if( ssl->transform_in == NULL )
     {
         if( ssl->in_msglen < 1 ||
-            ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
+            ssl->in_msglen > MBEDTLS_SSL_IN_CONTENT_LEN )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
             return( MBEDTLS_ERR_SSL_INVALID_RECORD );
@@ -3703,7 +3794,7 @@
 
 #if defined(MBEDTLS_SSL_PROTO_SSL3)
         if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
-            ssl->in_msglen > ssl->transform_in->minlen + MBEDTLS_SSL_MAX_CONTENT_LEN )
+            ssl->in_msglen > ssl->transform_in->minlen + MBEDTLS_SSL_IN_CONTENT_LEN )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
             return( MBEDTLS_ERR_SSL_INVALID_RECORD );
@@ -3716,7 +3807,7 @@
          */
         if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 &&
             ssl->in_msglen > ssl->transform_in->minlen +
-                             MBEDTLS_SSL_MAX_CONTENT_LEN + 256 )
+                             MBEDTLS_SSL_IN_CONTENT_LEN + 256 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
             return( MBEDTLS_ERR_SSL_INVALID_RECORD );
@@ -3764,7 +3855,7 @@
         MBEDTLS_SSL_DEBUG_BUF( 4, "input payload after decrypt",
                        ssl->in_msg, ssl->in_msglen );
 
-        if( ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
+        if( ssl->in_msglen > MBEDTLS_SSL_IN_CONTENT_LEN )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
             return( MBEDTLS_ERR_SSL_INVALID_RECORD );
@@ -4096,6 +4187,16 @@
 
     if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
     {
+        if( ssl->in_msglen != 2 )
+        {
+            /* Note: Standard allows for more than one 2 byte alert
+               to be packed in a single message, but Mbed TLS doesn't
+               currently support this. */
+            MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid alert message, len: %d",
+                           ssl->in_msglen ) );
+            return( MBEDTLS_ERR_SSL_INVALID_RECORD );
+        }
+
         MBEDTLS_SSL_DEBUG_MSG( 2, ( "got an alert message, type: [%d:%d]",
                        ssl->in_msg[0], ssl->in_msg[1] ) );
 
@@ -4325,10 +4426,10 @@
     while( crt != NULL )
     {
         n = crt->raw.len;
-        if( n > MBEDTLS_SSL_MAX_CONTENT_LEN - 3 - i )
+        if( n > MBEDTLS_SSL_OUT_CONTENT_LEN - 3 - i )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate too large, %d > %d",
-                           i + 3 + n, MBEDTLS_SSL_MAX_CONTENT_LEN ) );
+                           i + 3 + n, MBEDTLS_SSL_OUT_CONTENT_LEN ) );
             return( MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE );
         }
 
@@ -4528,6 +4629,12 @@
 
     while( i < ssl->in_hslen )
     {
+        if ( i + 3 > 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 );
+        }
         if( ssl->in_msg[i] != 0 )
         {
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
@@ -5662,17 +5769,23 @@
                        const mbedtls_ssl_config *conf )
 {
     int ret;
-    const size_t len = MBEDTLS_SSL_BUFFER_LEN;
 
     ssl->conf = conf;
 
     /*
      * Prepare base structures
      */
-    if( ( ssl-> in_buf = mbedtls_calloc( 1, len ) ) == NULL ||
-        ( ssl->out_buf = mbedtls_calloc( 1, len ) ) == NULL )
+    ssl->in_buf = mbedtls_calloc( 1, MBEDTLS_SSL_IN_BUFFER_LEN );
+    if( ssl->in_buf == NULL )
     {
-        MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", len ) );
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", MBEDTLS_SSL_IN_BUFFER_LEN) );
+        return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
+    }
+
+    ssl->out_buf = mbedtls_calloc( 1, MBEDTLS_SSL_OUT_BUFFER_LEN );
+    if( ssl->out_buf == NULL )
+    {
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", MBEDTLS_SSL_OUT_BUFFER_LEN) );
         mbedtls_free( ssl->in_buf );
         ssl->in_buf = NULL;
         return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
@@ -5773,9 +5886,9 @@
     ssl->transform_in = NULL;
     ssl->transform_out = NULL;
 
-    memset( ssl->out_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
+    memset( ssl->out_buf, 0, MBEDTLS_SSL_OUT_BUFFER_LEN );
     if( partial == 0 )
-        memset( ssl->in_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
+        memset( ssl->in_buf, 0, MBEDTLS_SSL_IN_BUFFER_LEN );
 
 #if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
     if( mbedtls_ssl_hw_record_reset != NULL )
@@ -6100,7 +6213,7 @@
 
     /* Identity len will be encoded on two bytes */
     if( ( psk_identity_len >> 16 ) != 0 ||
-        psk_identity_len > MBEDTLS_SSL_MAX_CONTENT_LEN )
+        psk_identity_len > MBEDTLS_SSL_OUT_CONTENT_LEN )
     {
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
@@ -6401,7 +6514,7 @@
 int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code )
 {
     if( mfl_code >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID ||
-        mfl_code_to_length[mfl_code] > MBEDTLS_SSL_MAX_CONTENT_LEN )
+        ssl_mfl_code_to_length( mfl_code ) > MBEDTLS_TLS_EXT_ADV_CONTENT_LEN )
     {
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
@@ -6679,15 +6792,15 @@
     /*
      * Assume mfl_code is correct since it was checked when set
      */
-    max_len = mfl_code_to_length[ssl->conf->mfl_code];
+    max_len = ssl_mfl_code_to_length( ssl->conf->mfl_code );
 
     /*
      * Check if a smaller max length was negotiated
      */
     if( ssl->session_out != NULL &&
-        mfl_code_to_length[ssl->session_out->mfl_code] < max_len )
+        ssl_mfl_code_to_length( ssl->session_out->mfl_code ) < max_len )
     {
-        max_len = mfl_code_to_length[ssl->session_out->mfl_code];
+        max_len = ssl_mfl_code_to_length( ssl->session_out->mfl_code );
     }
 
     return max_len;
@@ -7249,7 +7362,7 @@
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
     size_t max_len = mbedtls_ssl_get_max_frag_len( ssl );
 #else
-    size_t max_len = MBEDTLS_SSL_MAX_CONTENT_LEN;
+    size_t max_len = MBEDTLS_SSL_OUT_CONTENT_LEN;
 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
     if( len > max_len )
     {
@@ -7562,20 +7675,20 @@
 
     if( ssl->out_buf != NULL )
     {
-        mbedtls_platform_zeroize( ssl->out_buf, MBEDTLS_SSL_BUFFER_LEN );
+        mbedtls_platform_zeroize( ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN );
         mbedtls_free( ssl->out_buf );
     }
 
     if( ssl->in_buf != NULL )
     {
-        mbedtls_platform_zeroize( ssl->in_buf, MBEDTLS_SSL_BUFFER_LEN );
+        mbedtls_platform_zeroize( ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_LEN );
         mbedtls_free( ssl->in_buf );
     }
 
 #if defined(MBEDTLS_ZLIB_SUPPORT)
     if( ssl->compress_buf != NULL )
     {
-        mbedtls_platform_zeroize( ssl->compress_buf, MBEDTLS_SSL_BUFFER_LEN );
+        mbedtls_platform_zeroize( ssl->compress_buf, MBEDTLS_SSL_COMPRESS_BUFFER_LEN );
         mbedtls_free( ssl->compress_buf );
     }
 #endif
diff --git a/library/timing.c b/library/timing.c
index 6a30e51..3e8139f 100644
--- a/library/timing.c
+++ b/library/timing.c
@@ -39,7 +39,8 @@
 #if !defined(MBEDTLS_TIMING_ALT)
 
 #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
-    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__)
+    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__) && \
+    !defined(__HAIKU__)
 #error "This module only works on Unix and Windows, see MBEDTLS_TIMING_C in config.h"
 #endif
 
diff --git a/library/x509.c b/library/x509.c
index 371d6da..264c7fb 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -70,15 +70,6 @@
 #include <time.h>
 #endif
 
-#if defined(MBEDTLS_FS_IO)
-#include <stdio.h>
-#if !defined(_WIN32)
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#endif
-#endif
-
 #define CHECK(code) if( ( ret = code ) != 0 ){ return( ret ); }
 #define CHECK_RANGE(min, max, val) if( val < min || val > max ){ return( ret ); }
 
diff --git a/programs/.gitignore b/programs/.gitignore
index ddfa1a4..0241896 100644
--- a/programs/.gitignore
+++ b/programs/.gitignore
@@ -45,6 +45,7 @@
 test/benchmark
 test/ecp-bench
 test/selftest
+test/cpp_dummy_build
 test/ssl_cert_test
 test/udp_proxy
 test/zeroize
diff --git a/programs/Makefile b/programs/Makefile
index 080e82d..b6d1fa2 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -4,9 +4,11 @@
 
 CFLAGS	?= -O2
 WARNING_CFLAGS ?= -Wall -W -Wdeclaration-after-statement
+WARNING_CXXFLAGS ?= -Wall -W
 LDFLAGS ?=
 
 LOCAL_CFLAGS = $(WARNING_CFLAGS) -I../include -D_FILE_OFFSET_BITS=64
+LOCAL_CXXFLAGS = $(WARNING_CXXFLAGS) -I../include -D_FILE_OFFSET_BITS=64
 LOCAL_LDFLAGS = -L../library 			\
 		-lmbedtls$(SHARED_SUFFIX)	\
 		-lmbedx509$(SHARED_SUFFIX)	\
@@ -77,6 +79,10 @@
 APPS +=	ssl/ssl_pthread_server$(EXEXT)
 endif
 
+ifdef TEST_CPP
+APPS += test/cpp_dummy_build$(EXEXT)
+endif
+
 .SILENT:
 
 .PHONY: all clean list
@@ -242,6 +248,10 @@
 	echo "  CC    test/benchmark.c"
 	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) test/benchmark.c   $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
 
+test/cpp_dummy_build$(EXEXT): test/cpp_dummy_build.cpp $(DEP)
+	echo "  CXX   test/cpp_dummy_build.cpp"
+	$(CXX) $(LOCAL_CXXFLAGS) $(CXXFLAGS) test/cpp_dummy_build.cpp   $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
+
 test/selftest$(EXEXT): test/selftest.c $(DEP)
 	echo "  CC    test/selftest.c"
 	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) test/selftest.c    $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
diff --git a/programs/aes/aescrypt2.c b/programs/aes/aescrypt2.c
index 4acf38d..c727f93 100644
--- a/programs/aes/aescrypt2.c
+++ b/programs/aes/aescrypt2.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #include "mbedtls/aes.h"
 #include "mbedtls/md.h"
@@ -71,7 +74,8 @@
 #else
 int main( int argc, char *argv[] )
 {
-    int ret = 1;
+    int ret = 0;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
 
     unsigned int i, n;
     int mode, lastn;
@@ -429,7 +433,7 @@
         }
     }
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
     if( fin )
@@ -452,6 +456,6 @@
     mbedtls_aes_free( &aes_ctx );
     mbedtls_md_free( &sha_ctx );
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_AES_C && MBEDTLS_SHA256_C && MBEDTLS_FS_IO */
diff --git a/programs/aes/crypt_and_hash.c b/programs/aes/crypt_and_hash.c
index 0e272eb..99d30c9 100644
--- a/programs/aes/crypt_and_hash.c
+++ b/programs/aes/crypt_and_hash.c
@@ -30,9 +30,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_CIPHER_C) && defined(MBEDTLS_MD_C) && \
  defined(MBEDTLS_FS_IO)
@@ -74,6 +77,7 @@
 int main( int argc, char *argv[] )
 {
     int ret = 1, i, n;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     int mode;
     size_t keylen, ilen, olen;
     FILE *fkey, *fin = NULL, *fout = NULL;
@@ -526,7 +530,7 @@
         }
     }
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
     if( fin )
@@ -549,6 +553,6 @@
     mbedtls_cipher_free( &cipher_ctx );
     mbedtls_md_free( &md_ctx );
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_CIPHER_C && MBEDTLS_MD_C && MBEDTLS_FS_IO */
diff --git a/programs/hash/generic_sum.c b/programs/hash/generic_sum.c
index d1e81d4..bbe8d92 100644
--- a/programs/hash/generic_sum.c
+++ b/programs/hash/generic_sum.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_MD_C) && defined(MBEDTLS_FS_IO)
 #include "mbedtls/md.h"
@@ -169,7 +172,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret, i;
+    int ret = 1, i;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     const mbedtls_md_info_t *md_info;
     mbedtls_md_context_t md_ctx;
 
@@ -196,7 +200,7 @@
         fflush( stdout ); getchar();
 #endif
 
-        return( 1 );
+        return( exit_code );
     }
 
     /*
@@ -206,12 +210,12 @@
     if( md_info == NULL )
     {
         mbedtls_fprintf( stderr, "Message Digest '%s' not found\n", argv[1] );
-        return( 1 );
+        return( exit_code );
     }
     if( mbedtls_md_setup( &md_ctx, md_info, 0 ) )
     {
         mbedtls_fprintf( stderr, "Failed to initialize context.\n" );
-        return( 1 );
+        return( exit_code );
     }
 
     ret = 0;
@@ -224,9 +228,12 @@
     for( i = 2; i < argc; i++ )
         ret |= generic_print( md_info, argv[i] );
 
+    if ( ret == 0 )
+        exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_md_free( &md_ctx );
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_MD_C && MBEDTLS_FS_IO */
diff --git a/programs/pkey/dh_client.c b/programs/pkey/dh_client.c
index 0978408..3dadf48 100644
--- a/programs/pkey/dh_client.c
+++ b/programs/pkey/dh_client.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#define mbedtls_time_t     time_t
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define mbedtls_time_t          time_t
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_AES_C) && defined(MBEDTLS_DHM_C) && \
     defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_NET_C) && \
@@ -71,7 +74,8 @@
 {
     FILE *f;
 
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t n, buflen;
     mbedtls_net_context server_fd;
 
@@ -115,7 +119,6 @@
 
     if( ( f = fopen( "rsa_pub.txt", "rb" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not open rsa_pub.txt\n" \
                 "  ! Please run rsa_genkey first\n\n" );
         goto exit;
@@ -191,7 +194,6 @@
 
     if( dhm.len < 64 || dhm.len > 512 )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Invalid DHM modulus size\n\n" );
         goto exit;
     }
@@ -207,7 +209,6 @@
 
     if( ( n = (size_t) ( end - p ) ) != rsa.len )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Invalid RSA signature size\n\n" );
         goto exit;
     }
@@ -286,6 +287,8 @@
     buf[16] = '\0';
     mbedtls_printf( "\n  . Plaintext is \"%s\"\n\n", (char *) buf );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     mbedtls_net_free( &server_fd );
@@ -301,7 +304,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_AES_C && MBEDTLS_DHM_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_NET_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
diff --git a/programs/pkey/dh_genprime.c b/programs/pkey/dh_genprime.c
index 84a94a1..dbe9153 100644
--- a/programs/pkey/dh_genprime.c
+++ b/programs/pkey/dh_genprime.c
@@ -30,9 +30,11 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_printf     printf
-#define mbedtls_time_t     time_t
-#endif
+#define mbedtls_printf          printf
+#define mbedtls_time_t          time_t
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||   \
     !defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_CTR_DRBG_C) ||     \
@@ -69,6 +71,7 @@
 int main( int argc, char **argv )
 {
     int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_mpi G, P, Q;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
@@ -86,7 +89,7 @@
     {
     usage:
         mbedtls_printf( USAGE );
-        return( 1 );
+        return( exit_code );
     }
 
     for( i = 1; i < argc; i++ )
@@ -164,7 +167,6 @@
 
     if( ( fout = fopen( "dh_prime.txt", "wb+" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not create dh_prime.txt\n\n" );
         goto exit;
     }
@@ -180,6 +182,8 @@
     mbedtls_printf( " ok\n\n" );
     fclose( fout );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     mbedtls_mpi_free( &G ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
@@ -191,7 +195,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_FS_IO &&
           MBEDTLS_CTR_DRBG_C && MBEDTLS_GENPRIME */
diff --git a/programs/pkey/dh_server.c b/programs/pkey/dh_server.c
index 4304231..c4e2c39 100644
--- a/programs/pkey/dh_server.c
+++ b/programs/pkey/dh_server.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#define mbedtls_time_t     time_t
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define mbedtls_time_t          time_t
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_AES_C) && defined(MBEDTLS_DHM_C) && \
     defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_NET_C) && \
@@ -71,7 +74,8 @@
 {
     FILE *f;
 
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t n, buflen;
     mbedtls_net_context listen_fd, client_fd;
 
@@ -121,7 +125,6 @@
 
     if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not open rsa_priv.txt\n" \
                 "  ! Please run rsa_genkey first\n\n" );
         goto exit;
@@ -164,7 +167,6 @@
 
     if( ( f = fopen( "dh_prime.txt", "rb" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not open dh_prime.txt\n" \
                 "  ! Please run dh_genprime first\n\n" );
         goto exit;
@@ -304,6 +306,8 @@
 
     mbedtls_printf( "\n\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
@@ -323,7 +327,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_AES_C && MBEDTLS_DHM_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_NET_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
diff --git a/programs/pkey/ecdh_curve25519.c b/programs/pkey/ecdh_curve25519.c
index e7ead9a..5db0408 100644
--- a/programs/pkey/ecdh_curve25519.c
+++ b/programs/pkey/ecdh_curve25519.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_ECDH_C) || \
     !defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED) || \
@@ -51,7 +54,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_ecdh_context ctx_cli, ctx_srv;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
@@ -218,6 +222,7 @@
 
     mbedtls_printf( " ok\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
 
@@ -231,7 +236,7 @@
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 
-    return( ret != 0 );
+    return( exit_code );
 }
 #endif /* MBEDTLS_ECDH_C && MBEDTLS_ECP_DP_CURVE25519_ENABLED &&
           MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C */
diff --git a/programs/pkey/ecdsa.c b/programs/pkey/ecdsa.c
index b474060..c653df9 100644
--- a/programs/pkey/ecdsa.c
+++ b/programs/pkey/ecdsa.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_ECDSA_C) && \
     defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_CTR_DRBG_C)
@@ -98,7 +101,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_ecdsa_context ctx_sign, ctx_verify;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
@@ -115,7 +119,6 @@
 
     memset( sig, 0, sizeof( sig ) );
     memset( message, 0x25, sizeof( message ) );
-    ret = 1;
 
     if( argc != 1 )
     {
@@ -213,8 +216,6 @@
         goto exit;
     }
 
-    ret = 0;
-
     /*
      * Verify signature
      */
@@ -231,6 +232,8 @@
 
     mbedtls_printf( " ok\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
 #if defined(_WIN32)
@@ -243,7 +246,7 @@
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
           ECPARAMS */
diff --git a/programs/pkey/gen_key.c b/programs/pkey/gen_key.c
index a7f5c90..f01bf5f 100644
--- a/programs/pkey/gen_key.c
+++ b/programs/pkey/gen_key.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_PK_WRITE_C) && defined(MBEDTLS_FS_IO) && \
     defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_CTR_DRBG_C)
@@ -186,7 +189,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_pk_context key;
     char buf[1024];
     int i;
@@ -214,7 +218,6 @@
     if( argc == 0 )
     {
     usage:
-        ret = 1;
         mbedtls_printf( USAGE );
 #if defined(MBEDTLS_ECP_C)
         mbedtls_printf( " available ec_curve values:\n" );
@@ -222,7 +225,7 @@
         mbedtls_printf( "    %s (default)\n", curve_info->name );
         while( ( ++curve_info )->name != NULL )
             mbedtls_printf( "    %s\n", curve_info->name );
-#endif
+#endif /* MBEDTLS_ECP_C */
         goto exit;
     }
 
@@ -411,9 +414,11 @@
 
     mbedtls_printf( " ok\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
-    if( ret != 0 && ret != 1)
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
 #ifdef MBEDTLS_ERROR_C
         mbedtls_strerror( ret, buf, sizeof( buf ) );
@@ -436,7 +441,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_PK_WRITE_C && MBEDTLS_PEM_WRITE_C && MBEDTLS_FS_IO &&
         * MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C */
diff --git a/programs/pkey/key_app.c b/programs/pkey/key_app.c
index f1b548d..7a4cb39 100644
--- a/programs/pkey/key_app.c
+++ b/programs/pkey/key_app.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && \
     defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_FS_IO)
@@ -83,7 +86,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     char buf[1024];
     int i;
     char *p, *q;
@@ -283,10 +287,12 @@
     else
         goto usage;
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
 #if defined(MBEDTLS_ERROR_C)
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         mbedtls_strerror( ret, buf, sizeof(buf) );
         mbedtls_printf( "  !  Last error was: %s\n", buf );
@@ -303,6 +309,6 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */
diff --git a/programs/pkey/key_app_writer.c b/programs/pkey/key_app_writer.c
index 5f7d2dd..13602c2 100644
--- a/programs/pkey/key_app_writer.c
+++ b/programs/pkey/key_app_writer.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_PK_WRITE_C) && defined(MBEDTLS_FS_IO)
 #include "mbedtls/error.h"
@@ -189,7 +192,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     char buf[1024];
     int i;
     char *p, *q;
@@ -210,7 +214,6 @@
     if( argc == 0 )
     {
     usage:
-        ret = 1;
         mbedtls_printf( USAGE );
         goto exit;
     }
@@ -403,9 +406,11 @@
         write_private_key( &key, opt.output_file );
     }
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
-    if( ret != 0 && ret != 1)
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
 #ifdef MBEDTLS_ERROR_C
         mbedtls_strerror( ret, buf, sizeof( buf ) );
@@ -426,6 +431,6 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_PK_WRITE_C && MBEDTLS_FS_IO */
diff --git a/programs/pkey/mpi_demo.c b/programs/pkey/mpi_demo.c
index afe8957..365bdc4 100644
--- a/programs/pkey/mpi_demo.c
+++ b/programs/pkey/mpi_demo.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_FS_IO)
 #include "mbedtls/bignum.h"
@@ -47,7 +50,8 @@
 #else
 int main( void )
 {
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_mpi E, P, Q, N, H, D, X, Y, Z;
 
     mbedtls_mpi_init( &E ); mbedtls_mpi_init( &P ); mbedtls_mpi_init( &Q ); mbedtls_mpi_init( &N );
@@ -88,15 +92,16 @@
     MBEDTLS_MPI_CHK( mbedtls_mpi_write_file( "  Z (decrypted)  = Y^D mod N = ", &Z, 10, NULL ) );
     mbedtls_printf( "\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 cleanup:
     mbedtls_mpi_free( &E ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q ); mbedtls_mpi_free( &N );
     mbedtls_mpi_free( &H ); mbedtls_mpi_free( &D ); mbedtls_mpi_free( &X ); mbedtls_mpi_free( &Y );
     mbedtls_mpi_free( &Z );
 
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         mbedtls_printf( "\nAn error occurred.\n" );
-        ret = 1;
     }
 
 #if defined(_WIN32)
@@ -104,6 +109,6 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_FS_IO */
diff --git a/programs/pkey/pk_decrypt.c b/programs/pkey/pk_decrypt.c
index 32fbc75..00bd71e 100644
--- a/programs/pkey/pk_decrypt.c
+++ b/programs/pkey/pk_decrypt.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
     defined(MBEDTLS_FS_IO) && defined(MBEDTLS_ENTROPY_C) && \
@@ -59,7 +62,8 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int ret, c;
+    int ret = 1, c;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i, olen = 0;
     mbedtls_pk_context pk;
     mbedtls_entropy_context entropy;
@@ -71,7 +75,6 @@
 
     mbedtls_ctr_drbg_init( &ctr_drbg );
     memset(result, 0, sizeof( result ) );
-    ret = 1;
 
     if( argc != 2 )
     {
@@ -110,8 +113,6 @@
     /*
      * Extract the RSA encrypted value from the text file
      */
-    ret = 1;
-
     if( ( f = fopen( "result-enc.txt", "rb" ) ) == NULL )
     {
         mbedtls_printf( "\n  ! Could not open %s\n\n", "result-enc.txt" );
@@ -143,14 +144,14 @@
 
     mbedtls_printf( "The decrypted result is: '%s'\n\n", result );
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 
 #if defined(MBEDTLS_ERROR_C)
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
         mbedtls_printf( "  !  Last error was: %s\n", buf );
@@ -162,7 +163,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
           MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C */
diff --git a/programs/pkey/pk_encrypt.c b/programs/pkey/pk_encrypt.c
index 7ca9d5a..400619c 100644
--- a/programs/pkey/pk_encrypt.c
+++ b/programs/pkey/pk_encrypt.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_PK_PARSE_C) && \
     defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
@@ -59,7 +62,8 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i, olen = 0;
     mbedtls_pk_context pk;
     mbedtls_entropy_context entropy;
@@ -68,7 +72,6 @@
     unsigned char buf[512];
     const char *pers = "mbedtls_pk_encrypt";
 
-    ret = 1;
     mbedtls_ctr_drbg_init( &ctr_drbg );
 
     if( argc != 3 )
@@ -132,7 +135,6 @@
      */
     if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not create %s\n\n", "result-enc.txt" );
         goto exit;
     }
@@ -145,12 +147,14 @@
 
     mbedtls_printf( "\n  . Done (created \"%s\")\n\n", "result-enc.txt" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 
 #if defined(MBEDTLS_ERROR_C)
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
         mbedtls_printf( "  !  Last error was: %s\n", buf );
@@ -162,7 +166,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_PK_PARSE_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
diff --git a/programs/pkey/pk_sign.c b/programs/pkey/pk_sign.c
index 55df95e..7ec4675 100644
--- a/programs/pkey/pk_sign.c
+++ b/programs/pkey/pk_sign.c
@@ -30,9 +30,11 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_snprintf   snprintf
-#define mbedtls_printf     printf
-#endif
+#define mbedtls_snprintf        snprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
     !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
@@ -61,6 +63,7 @@
 {
     FILE *f;
     int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_pk_context pk;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
@@ -134,14 +137,12 @@
 
     if( ( f = fopen( filename, "wb+" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not create %s\n\n", filename );
         goto exit;
     }
 
     if( fwrite( buf, 1, olen, f ) != olen )
     {
-        ret = 1;
         mbedtls_printf( "failed\n  ! fwrite failed\n\n" );
         fclose( f );
         goto exit;
@@ -151,13 +152,15 @@
 
     mbedtls_printf( "\n  . Done (created \"%s\")\n\n", filename );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_pk_free( &pk );
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 
 #if defined(MBEDTLS_ERROR_C)
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
         mbedtls_printf( "  !  Last error was: %s\n", buf );
@@ -169,7 +172,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret ? EXIT_FAILURE : EXIT_SUCCESS );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
diff --git a/programs/pkey/pk_verify.c b/programs/pkey/pk_verify.c
index d35d17f..3c7709f 100644
--- a/programs/pkey/pk_verify.c
+++ b/programs/pkey/pk_verify.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_snprintf   snprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_snprintf        snprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_MD_C) || \
     !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_PK_PARSE_C) ||   \
@@ -56,6 +59,7 @@
 {
     FILE *f;
     int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i;
     mbedtls_pk_context pk;
     unsigned char hash[32];
@@ -87,7 +91,6 @@
     /*
      * Extract the signature from the file
      */
-    ret = 1;
     mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[2] );
 
     if( ( f = fopen( filename, "rb" ) ) == NULL )
@@ -125,13 +128,13 @@
 
     mbedtls_printf( "\n  . OK (the signature is valid)\n\n" );
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
     mbedtls_pk_free( &pk );
 
 #if defined(MBEDTLS_ERROR_C)
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         mbedtls_strerror( ret, (char *) buf, sizeof(buf) );
         mbedtls_printf( "  !  Last error was: %s\n", buf );
@@ -143,7 +146,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_SHA256_C &&
           MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */
diff --git a/programs/pkey/rsa_decrypt.c b/programs/pkey/rsa_decrypt.c
index 2da3fbf..0a252d2 100644
--- a/programs/pkey/rsa_decrypt.c
+++ b/programs/pkey/rsa_decrypt.c
@@ -30,11 +30,11 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_printf     printf
-#define mbedtls_exit       exit
+#define mbedtls_printf       printf
+#define mbedtls_exit         exit
 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
-#endif
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_RSA_C) && \
     defined(MBEDTLS_FS_IO) && defined(MBEDTLS_ENTROPY_C) && \
@@ -61,7 +61,9 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int return_val, exit_val, c;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
+    int c;
     size_t i;
     mbedtls_rsa_context rsa;
     mbedtls_mpi N, P, Q, D, E, DP, DQ, QP;
@@ -73,7 +75,6 @@
     ((void) argv);
 
     memset(result, 0, sizeof( result ) );
-    exit_val = MBEDTLS_EXIT_SUCCESS;
 
     if( argc != 1 )
     {
@@ -83,7 +84,7 @@
         mbedtls_printf( "\n" );
 #endif
 
-        mbedtls_exit( MBEDTLS_EXIT_FAILURE );
+        mbedtls_exit( exit_code );
     }
 
     mbedtls_printf( "\n  . Seeding the random number generator..." );
@@ -96,14 +97,13 @@
     mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
     mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
 
-    return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
+    ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
                                         &entropy, (const unsigned char *) pers,
                                         strlen( pers ) );
-    if( return_val != 0 )
+    if( ret != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
@@ -112,40 +112,38 @@
 
     if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! Could not open rsa_priv.txt\n" \
                 "  ! Please run rsa_genkey first\n\n" );
         goto exit;
     }
 
-    if( ( return_val = mbedtls_mpi_read_file( &N , 16, f ) )  != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &E , 16, f ) )  != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &D , 16, f ) )  != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &P , 16, f ) )  != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &Q , 16, f ) )  != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 )
+    if( ( ret = mbedtls_mpi_read_file( &N , 16, f ) )  != 0 ||
+        ( ret = mbedtls_mpi_read_file( &E , 16, f ) )  != 0 ||
+        ( ret = mbedtls_mpi_read_file( &D , 16, f ) )  != 0 ||
+        ( ret = mbedtls_mpi_read_file( &P , 16, f ) )  != 0 ||
+        ( ret = mbedtls_mpi_read_file( &Q , 16, f ) )  != 0 ||
+        ( ret = mbedtls_mpi_read_file( &DP , 16, f ) ) != 0 ||
+        ( ret = mbedtls_mpi_read_file( &DQ , 16, f ) ) != 0 ||
+        ( ret = mbedtls_mpi_read_file( &QP , 16, f ) ) != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_mpi_read_file returned %d\n\n",
-                        return_val );
+                        ret );
         fclose( f );
         goto exit;
     }
     fclose( f );
 
-    if( ( return_val = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 )
+    if( ( ret = mbedtls_rsa_import( &rsa, &N, &P, &Q, &D, &E ) ) != 0 )
     {
         mbedtls_printf( " failed\n  ! mbedtls_rsa_import returned %d\n\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
-    if( ( return_val = mbedtls_rsa_complete( &rsa ) ) != 0 )
+    if( ( ret = mbedtls_rsa_complete( &rsa ) ) != 0 )
     {
         mbedtls_printf( " failed\n  ! mbedtls_rsa_complete returned %d\n\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
@@ -154,7 +152,6 @@
      */
     if( ( f = fopen( "result-enc.txt", "rb" ) ) == NULL )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( "\n  ! Could not open %s\n\n", "result-enc.txt" );
         goto exit;
     }
@@ -169,7 +166,6 @@
 
     if( i != rsa.len )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( "\n  ! Invalid RSA signature format\n\n" );
         goto exit;
     }
@@ -180,14 +176,13 @@
     mbedtls_printf( "\n  . Decrypting the encrypted data" );
     fflush( stdout );
 
-    return_val = mbedtls_rsa_pkcs1_decrypt( &rsa, mbedtls_ctr_drbg_random,
+    ret = mbedtls_rsa_pkcs1_decrypt( &rsa, mbedtls_ctr_drbg_random,
                                             &ctr_drbg, MBEDTLS_RSA_PRIVATE, &i,
                                             buf, result, 1024 );
-    if( return_val != 0 )
+    if( ret != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_rsa_pkcs1_decrypt returned %d\n\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
@@ -195,6 +190,8 @@
 
     mbedtls_printf( "The decrypted result is: '%s'\n\n", result );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
@@ -208,6 +205,6 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( exit_val );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_FS_IO */
diff --git a/programs/pkey/rsa_encrypt.c b/programs/pkey/rsa_encrypt.c
index 81c27d8..411657a 100644
--- a/programs/pkey/rsa_encrypt.c
+++ b/programs/pkey/rsa_encrypt.c
@@ -30,12 +30,12 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#define mbedtls_exit       exit
-#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
-#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
-#endif
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define mbedtls_exit            exit
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_RSA_C) && \
     defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO) && \
@@ -61,7 +61,8 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int return_val, exit_val;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i;
     mbedtls_rsa_context rsa;
     mbedtls_entropy_context entropy;
@@ -71,8 +72,6 @@
     const char *pers = "rsa_encrypt";
     mbedtls_mpi N, E;
 
-    exit_val = MBEDTLS_EXIT_SUCCESS;
-
     if( argc != 2 )
     {
         mbedtls_printf( "usage: rsa_encrypt <string of max 100 characters>\n" );
@@ -81,7 +80,7 @@
         mbedtls_printf( "\n" );
 #endif
 
-        mbedtls_exit( MBEDTLS_EXIT_FAILURE );
+        mbedtls_exit( exit_code );
     }
 
     mbedtls_printf( "\n  . Seeding the random number generator..." );
@@ -92,14 +91,13 @@
     mbedtls_ctr_drbg_init( &ctr_drbg );
     mbedtls_entropy_init( &entropy );
 
-    return_val = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
-                                        &entropy, (const unsigned char *) pers,
-                                        strlen( pers ) );
-    if( return_val != 0 )
+    ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
+                                 &entropy, (const unsigned char *) pers,
+                                 strlen( pers ) );
+    if( ret != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
@@ -108,35 +106,30 @@
 
     if( ( f = fopen( "rsa_pub.txt", "rb" ) ) == NULL )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! Could not open rsa_pub.txt\n" \
                 "  ! Please run rsa_genkey first\n\n" );
         goto exit;
     }
 
-    if( ( return_val = mbedtls_mpi_read_file( &N, 16, f ) ) != 0 ||
-        ( return_val = mbedtls_mpi_read_file( &E, 16, f ) ) != 0 )
+    if( ( ret = mbedtls_mpi_read_file( &N, 16, f ) ) != 0 ||
+        ( ret = mbedtls_mpi_read_file( &E, 16, f ) ) != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_mpi_read_file returned %d\n\n",
-                        return_val );
+                        ret );
         fclose( f );
         goto exit;
     }
     fclose( f );
 
-    if( ( return_val = mbedtls_rsa_import( &rsa, &N, NULL,
-                                           NULL, NULL, &E ) ) != 0 )
+    if( ( ret = mbedtls_rsa_import( &rsa, &N, NULL, NULL, NULL, &E ) ) != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_rsa_import returned %d\n\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
     if( strlen( argv[1] ) > 100 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " Input data larger than 100 characters.\n\n" );
         goto exit;
     }
@@ -149,14 +142,13 @@
     mbedtls_printf( "\n  . Generating the RSA encrypted value" );
     fflush( stdout );
 
-    return_val = mbedtls_rsa_pkcs1_encrypt( &rsa, mbedtls_ctr_drbg_random,
-                                            &ctr_drbg, MBEDTLS_RSA_PUBLIC,
-                                            strlen( argv[1] ), input, buf );
-    if( return_val != 0 )
+    ret = mbedtls_rsa_pkcs1_encrypt( &rsa, mbedtls_ctr_drbg_random,
+                                     &ctr_drbg, MBEDTLS_RSA_PUBLIC,
+                                     strlen( argv[1] ), input, buf );
+    if( ret != 0 )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! mbedtls_rsa_pkcs1_encrypt returned %d\n\n",
-                        return_val );
+                        ret );
         goto exit;
     }
 
@@ -165,7 +157,6 @@
      */
     if( ( f = fopen( "result-enc.txt", "wb+" ) ) == NULL )
     {
-        exit_val = MBEDTLS_EXIT_FAILURE;
         mbedtls_printf( " failed\n  ! Could not create %s\n\n", "result-enc.txt" );
         goto exit;
     }
@@ -178,6 +169,8 @@
 
     mbedtls_printf( "\n  . Done (created \"%s\")\n\n", "result-enc.txt" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_mpi_free( &N ); mbedtls_mpi_free( &E );
     mbedtls_ctr_drbg_free( &ctr_drbg );
@@ -189,7 +182,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( exit_val );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
diff --git a/programs/pkey/rsa_genkey.c b/programs/pkey/rsa_genkey.c
index 9399217..3359e14 100644
--- a/programs/pkey/rsa_genkey.c
+++ b/programs/pkey/rsa_genkey.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BIGNUM_C) && defined(MBEDTLS_ENTROPY_C) && \
     defined(MBEDTLS_RSA_C) && defined(MBEDTLS_GENPRIME) && \
@@ -61,7 +64,8 @@
 #else
 int main( void )
 {
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_rsa_context rsa;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
@@ -105,14 +109,12 @@
         ( ret = mbedtls_rsa_export_crt( &rsa, &DP, &DQ, &QP ) )      != 0 )
     {
         mbedtls_printf( " failed\n  ! could not export RSA parameters\n\n" );
-        ret = 1;
         goto exit;
     }
 
     if( ( fpub = fopen( "rsa_pub.txt", "wb+" ) ) == NULL )
     {
         mbedtls_printf( " failed\n  ! could not open rsa_pub.txt for writing\n\n" );
-        ret = 1;
         goto exit;
     }
 
@@ -129,7 +131,6 @@
     if( ( fpriv = fopen( "rsa_priv.txt", "wb+" ) ) == NULL )
     {
         mbedtls_printf( " failed\n  ! could not open rsa_priv.txt for writing\n" );
-        ret = 1;
         goto exit;
     }
 
@@ -160,6 +161,8 @@
 */
     mbedtls_printf( " ok\n\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     if( fpub  != NULL )
@@ -180,7 +183,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_RSA_C &&
           MBEDTLS_GENPRIME && MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */
diff --git a/programs/pkey/rsa_sign.c b/programs/pkey/rsa_sign.c
index 89018cb..b16fe5d 100644
--- a/programs/pkey/rsa_sign.c
+++ b/programs/pkey/rsa_sign.c
@@ -29,10 +29,13 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#define mbedtls_snprintf   snprintf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define mbedtls_snprintf        snprintf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
     !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
@@ -55,7 +58,8 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i;
     mbedtls_rsa_context rsa;
     unsigned char hash[32];
@@ -69,8 +73,6 @@
     mbedtls_mpi_init( &D ); mbedtls_mpi_init( &E ); mbedtls_mpi_init( &DP );
     mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
 
-    ret = 1;
-
     if( argc != 2 )
     {
         mbedtls_printf( "usage: rsa_sign <filename>\n" );
@@ -87,7 +89,6 @@
 
     if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not open rsa_priv.txt\n" \
                 "  ! Please run rsa_genkey first\n\n" );
         goto exit;
@@ -159,7 +160,6 @@
 
     if( ( f = fopen( filename, "wb+" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not create %s\n\n", argv[1] );
         goto exit;
     }
@@ -172,6 +172,8 @@
 
     mbedtls_printf( "\n  . Done (created \"%s\")\n\n", filename );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     mbedtls_rsa_free( &rsa );
@@ -184,7 +186,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
           MBEDTLS_FS_IO */
diff --git a/programs/pkey/rsa_sign_pss.c b/programs/pkey/rsa_sign_pss.c
index 7b6f14d..b0b0f7e 100644
--- a/programs/pkey/rsa_sign_pss.c
+++ b/programs/pkey/rsa_sign_pss.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_snprintf   snprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_snprintf        snprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
     !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) ||        \
@@ -61,6 +64,7 @@
 {
     FILE *f;
     int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_pk_context pk;
     mbedtls_entropy_context entropy;
     mbedtls_ctr_drbg_context ctr_drbg;
@@ -101,7 +105,6 @@
 
     if( ( ret = mbedtls_pk_parse_keyfile( &pk, argv[1], "" ) ) != 0 )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not read key from '%s'\n", argv[1] );
         mbedtls_printf( "  ! mbedtls_pk_parse_public_keyfile returned %d\n\n", ret );
         goto exit;
@@ -109,7 +112,6 @@
 
     if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Key is not an RSA key\n" );
         goto exit;
     }
@@ -145,7 +147,6 @@
 
     if( ( f = fopen( filename, "wb+" ) ) == NULL )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Could not create %s\n\n", filename );
         goto exit;
     }
@@ -161,6 +162,8 @@
 
     mbedtls_printf( "\n  . Done (created \"%s\")\n\n", filename );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_pk_free( &pk );
     mbedtls_ctr_drbg_free( &ctr_drbg );
@@ -171,7 +174,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_RSA_C &&
           MBEDTLS_SHA256_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
diff --git a/programs/pkey/rsa_verify.c b/programs/pkey/rsa_verify.c
index 1f827aa..6f88345 100644
--- a/programs/pkey/rsa_verify.c
+++ b/programs/pkey/rsa_verify.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#define mbedtls_snprintf   snprintf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define mbedtls_snprintf        snprintf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
     !defined(MBEDTLS_SHA256_C) || !defined(MBEDTLS_MD_C) || \
@@ -54,7 +57,8 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int ret, c;
+    int ret = 1, c;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i;
     mbedtls_rsa_context rsa;
     unsigned char hash[32];
@@ -62,7 +66,6 @@
     char filename[512];
 
     mbedtls_rsa_init( &rsa, MBEDTLS_RSA_PKCS_V15, 0 );
-    ret = 1;
 
     if( argc != 2 )
     {
@@ -100,7 +103,6 @@
     /*
      * Extract the RSA signature from the text file
      */
-    ret = 1;
     mbedtls_snprintf( filename, sizeof(filename), "%s.sig", argv[1] );
 
     if( ( f = fopen( filename, "rb" ) ) == NULL )
@@ -146,7 +148,7 @@
 
     mbedtls_printf( "\n  . OK (the signature is valid)\n\n" );
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
 
@@ -157,7 +159,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
           MBEDTLS_FS_IO */
diff --git a/programs/pkey/rsa_verify_pss.c b/programs/pkey/rsa_verify_pss.c
index 31b720f..7c9c68f 100644
--- a/programs/pkey/rsa_verify_pss.c
+++ b/programs/pkey/rsa_verify_pss.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_snprintf   snprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_snprintf        snprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
     !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_SHA256_C) ||        \
@@ -60,6 +63,7 @@
 {
     FILE *f;
     int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     size_t i;
     mbedtls_pk_context pk;
     unsigned char hash[32];
@@ -91,7 +95,6 @@
 
     if( !mbedtls_pk_can_do( &pk, MBEDTLS_PK_RSA ) )
     {
-        ret = 1;
         mbedtls_printf( " failed\n  ! Key is not an RSA key\n" );
         goto exit;
     }
@@ -101,7 +104,6 @@
     /*
      * Extract the RSA signature from the file
      */
-    ret = 1;
     mbedtls_snprintf( filename, 512, "%s.sig", argv[2] );
 
     if( ( f = fopen( filename, "rb" ) ) == NULL )
@@ -139,7 +141,7 @@
 
     mbedtls_printf( "\n  . OK (the signature is valid)\n\n" );
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
     mbedtls_pk_free( &pk );
@@ -149,7 +151,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_SHA256_C &&
           MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */
diff --git a/programs/random/gen_entropy.c b/programs/random/gen_entropy.c
index 792d381..a1eb386 100644
--- a/programs/random/gen_entropy.c
+++ b/programs/random/gen_entropy.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_FS_IO)
 #include "mbedtls/entropy.h"
@@ -49,20 +52,21 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int i, k, ret;
+    int i, k, ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_entropy_context entropy;
     unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
 
     if( argc < 2 )
     {
         mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
-        return( 1 );
+        return( exit_code );
     }
 
     if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
     {
         mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
-        return( 1 );
+        return( exit_code );
     }
 
     mbedtls_entropy_init( &entropy );
@@ -72,7 +76,8 @@
         ret = mbedtls_entropy_func( &entropy, buf, sizeof( buf ) );
         if( ret != 0 )
         {
-            mbedtls_printf("failed!\n");
+            mbedtls_printf( "  failed\n  !  mbedtls_entropy_func returned -%04X\n",
+                            ret );
             goto cleanup;
         }
 
@@ -83,7 +88,7 @@
         fflush( stdout );
     }
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 cleanup:
     mbedtls_printf( "\n" );
@@ -91,6 +96,6 @@
     fclose( f );
     mbedtls_entropy_free( &entropy );
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_ENTROPY_C */
diff --git a/programs/random/gen_random_ctr_drbg.c b/programs/random/gen_random_ctr_drbg.c
index c76f99d..5ade946 100644
--- a/programs/random/gen_random_ctr_drbg.c
+++ b/programs/random/gen_random_ctr_drbg.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_CTR_DRBG_C) && defined(MBEDTLS_ENTROPY_C) && \
  defined(MBEDTLS_FS_IO)
@@ -52,7 +55,8 @@
 int main( int argc, char *argv[] )
 {
     FILE *f;
-    int i, k, ret;
+    int i, k, ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_ctr_drbg_context ctr_drbg;
     mbedtls_entropy_context entropy;
     unsigned char buf[1024];
@@ -62,13 +66,13 @@
     if( argc < 2 )
     {
         mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
-        return( 1 );
+        return( exit_code );
     }
 
     if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
     {
         mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
-        return( 1 );
+        return( exit_code );
     }
 
     mbedtls_entropy_init( &entropy );
@@ -116,7 +120,7 @@
         fflush( stdout );
     }
 
-    ret = 0;
+    exit_code = MBEDTLS_EXIT_SUCCESS;
 
 cleanup:
     mbedtls_printf("\n");
@@ -125,6 +129,6 @@
     mbedtls_ctr_drbg_free( &ctr_drbg );
     mbedtls_entropy_free( &entropy );
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_CTR_DRBG_C && MBEDTLS_ENTROPY_C */
diff --git a/programs/random/gen_random_havege.c b/programs/random/gen_random_havege.c
index 6c31462..3fb3f01 100644
--- a/programs/random/gen_random_havege.c
+++ b/programs/random/gen_random_havege.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_HAVEGE_C) && defined(MBEDTLS_FS_IO)
 #include "mbedtls/havege.h"
@@ -51,20 +54,21 @@
 {
     FILE *f;
     time_t t;
-    int i, k, ret = 0;
+    int i, k, ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_havege_state hs;
     unsigned char buf[1024];
 
     if( argc < 2 )
     {
         mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
-        return( 1 );
+        return( exit_code );
     }
 
     if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
     {
         mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
-        return( 1 );
+        return( exit_code );
     }
 
     mbedtls_havege_init( &hs );
@@ -73,11 +77,10 @@
 
     for( i = 0, k = 768; i < k; i++ )
     {
-        if( mbedtls_havege_random( &hs, buf, sizeof( buf ) ) != 0 )
+        if( ( ret = mbedtls_havege_random( &hs, buf, sizeof( buf ) ) ) != 0 )
         {
-            mbedtls_printf( "Failed to get random from source.\n" );
-
-            ret = 1;
+            mbedtls_printf( " failed\n  !  mbedtls_havege_random returned -0x%04X",
+                            -ret );
             goto exit;
         }
 
@@ -93,9 +96,11 @@
 
     mbedtls_printf(" \n ");
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_havege_free( &hs );
     fclose( f );
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_HAVEGE_C */
diff --git a/programs/ssl/ssl_client1.c b/programs/ssl/ssl_client1.c
index 01cee13..bf7c013 100644
--- a/programs/ssl/ssl_client1.c
+++ b/programs/ssl/ssl_client1.c
@@ -30,11 +30,13 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_time       time
-#define mbedtls_time_t     time_t
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#define mbedtls_time            time
+#define mbedtls_time_t          time_t
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
     !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
@@ -80,7 +82,8 @@
 
 int main( void )
 {
-    int ret, len;
+    int ret = 1, len;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_net_context server_fd;
     uint32_t flags;
     unsigned char buf[1024];
@@ -281,10 +284,12 @@
 
     mbedtls_ssl_close_notify( &ssl );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
 #ifdef MBEDTLS_ERROR_C
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         char error_buf[100];
         mbedtls_strerror( ret, error_buf, 100 );
@@ -305,7 +310,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
           MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 5d8969d..0dd9e3f 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -246,8 +246,12 @@
     "    server_addr=%%s      default: given by name\n"     \
     "    server_port=%%d      default: 4433\n"              \
     "    request_page=%%s     default: \".\"\n"             \
-    "    request_size=%%d     default: about 34 (basic request)\n" \
-    "                        (minimum: 0, max: " MAX_REQUEST_SIZE_STR " )\n" \
+    "    request_size=%%d     default: about 34 (basic request)\n"           \
+    "                        (minimum: 0, max: " MAX_REQUEST_SIZE_STR ")\n"  \
+    "                        If 0, in the first exchange only an empty\n"    \
+    "                        application data message is sent followed by\n" \
+    "                        a second non-empty message before attempting\n" \
+    "                        to read a response from the server\n"           \
     "    debug_level=%%d      default: 0 (disabled)\n"             \
     "    nbio=%%d             default: 0 (blocking I/O)\n"         \
     "                        options: 1 (non-blocking), 2 (added delays)\n"   \
@@ -1663,10 +1667,13 @@
 
     if( opt.transport == MBEDTLS_SSL_TRANSPORT_STREAM )
     {
-        for( written = 0, frags = 0; written < len; written += ret, frags++ )
+        written = 0;
+        frags = 0;
+
+        do
         {
             while( ( ret = mbedtls_ssl_write( &ssl, buf + written,
-                                              len - written ) ) <= 0 )
+                                              len - written ) ) < 0 )
             {
                 if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
                     ret != MBEDTLS_ERR_SSL_WANT_WRITE )
@@ -1686,7 +1693,11 @@
 #endif
                 }
             }
+
+            frags++;
+            written += ret;
         }
+        while( written < len );
     }
     else /* Not stream, so datagram */
     {
@@ -1730,6 +1741,13 @@
     mbedtls_printf( " %d bytes written in %d fragments\n\n%s\n",
                     written, frags, (char *) buf );
 
+    /* Send a non-empty request if request_size == 0 */
+    if ( len == 0 )
+    {
+        opt.request_size = DFL_REQUEST_SIZE;
+        goto send_request;
+    }
+
     /*
      * 7. Read the HTTP response
      */
diff --git a/programs/ssl/ssl_fork_server.c b/programs/ssl/ssl_fork_server.c
index 7624896..1c3a806 100644
--- a/programs/ssl/ssl_fork_server.c
+++ b/programs/ssl/ssl_fork_server.c
@@ -29,10 +29,13 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#define mbedtls_time_t     time_t
-#endif
+#include <stdlib.h>
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define mbedtls_time_t          time_t
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_CERTS_C) ||    \
     !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_SSL_TLS_C) || \
@@ -95,7 +98,8 @@
 
 int main( void )
 {
-    int ret, len, cnt = 0, pid;
+    int ret = 1, len, cnt = 0, pid;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_net_context listen_fd, client_fd;
     unsigned char buf[1024];
     const char *pers = "ssl_fork_server";
@@ -392,6 +396,8 @@
         goto exit;
     }
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_net_free( &client_fd );
     mbedtls_net_free( &listen_fd );
@@ -408,7 +414,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_CERTS_C && MBEDTLS_ENTROPY_C &&
           MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_SRV_C && MBEDTLS_NET_C &&
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index 04b847a..04f8910 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -30,11 +30,13 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_time       time
-#define mbedtls_time_t     time_t
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#define mbedtls_time            time
+#define mbedtls_time_t          time_t
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
     !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
@@ -346,7 +348,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0, len;
+    int ret = 1, len;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_net_context server_fd;
     unsigned char buf[1024];
 #if defined(MBEDTLS_BASE64_C)
@@ -499,8 +502,8 @@
                               mbedtls_test_cas_pem_len );
 #else
     {
-        ret = 1;
         mbedtls_printf("MBEDTLS_CERTS_C and/or MBEDTLS_PEM_PARSE_C not defined.");
+        goto exit;
     }
 #endif
     if( ret < 0 )
@@ -529,8 +532,8 @@
                               mbedtls_test_cli_crt_len );
 #else
     {
-        ret = -1;
         mbedtls_printf("MBEDTLS_CERTS_C not defined.");
+        goto exit;
     }
 #endif
     if( ret != 0 )
@@ -549,8 +552,8 @@
                 mbedtls_test_cli_key_len, NULL, 0 );
 #else
     {
-        ret = -1;
         mbedtls_printf("MBEDTLS_CERTS_C or MBEDTLS_PEM_PARSE_C not defined.");
+        goto exit;
     }
 #endif
     if( ret != 0 )
@@ -819,6 +822,8 @@
 
     mbedtls_ssl_close_notify( &ssl );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     mbedtls_net_free( &server_fd );
@@ -835,7 +840,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
           MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C **
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 3a413ad..7654a64 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -97,6 +97,10 @@
 #include <windows.h>
 #endif
 
+/* Size of memory to be allocated for the heap, when using the library's memory
+ * management and MBEDTLS_MEMORY_BUFFER_ALLOC_C is enabled. */
+#define MEMORY_HEAP_SIZE        120000
+
 #define DFL_SERVER_ADDR         NULL
 #define DFL_SERVER_PORT         "4433"
 #define DFL_DEBUG_LEVEL         0
@@ -1212,7 +1216,7 @@
     const char *alpn_list[ALPN_LIST_SIZE];
 #endif
 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
-    unsigned char alloc_buf[100000];
+    unsigned char alloc_buf[MEMORY_HEAP_SIZE];
 #endif
 
     int i;
diff --git a/programs/test/CMakeLists.txt b/programs/test/CMakeLists.txt
index 0c5ce27..9ca0cb2 100644
--- a/programs/test/CMakeLists.txt
+++ b/programs/test/CMakeLists.txt
@@ -16,6 +16,11 @@
 add_executable(benchmark benchmark.c)
 target_link_libraries(benchmark ${libs})
 
+if(TEST_CPP)
+    add_executable(cpp_dummy_build cpp_dummy_build.cpp)
+    target_link_libraries(cpp_dummy_build ${libs})
+endif()
+
 add_executable(ssl_cert_test ssl_cert_test.c)
 target_link_libraries(ssl_cert_test ${libs})
 
diff --git a/programs/test/cpp_dummy_build.cpp b/programs/test/cpp_dummy_build.cpp
new file mode 100644
index 0000000..41c24c9
--- /dev/null
+++ b/programs/test/cpp_dummy_build.cpp
@@ -0,0 +1,118 @@
+/*
+ *  This program is a dummy C++ program to ensure Mbed TLS library header files
+ *  can be included and built with a C++ compiler.
+ *
+ *  Copyright (C) 2018, 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)
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "mbedtls/aes.h"
+#include "mbedtls/aesni.h"
+#include "mbedtls/arc4.h"
+#include "mbedtls/aria.h"
+#include "mbedtls/asn1.h"
+#include "mbedtls/asn1write.h"
+#include "mbedtls/base64.h"
+#include "mbedtls/bignum.h"
+#include "mbedtls/blowfish.h"
+#include "mbedtls/bn_mul.h"
+#include "mbedtls/camellia.h"
+#include "mbedtls/ccm.h"
+#include "mbedtls/certs.h"
+#include "mbedtls/chacha20.h"
+#include "mbedtls/chachapoly.h"
+#include "mbedtls/check_config.h"
+#include "mbedtls/cipher.h"
+#include "mbedtls/cipher_internal.h"
+#include "mbedtls/cmac.h"
+#include "mbedtls/compat-1.3.h"
+#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/debug.h"
+#include "mbedtls/des.h"
+#include "mbedtls/dhm.h"
+#include "mbedtls/ecdh.h"
+#include "mbedtls/ecdsa.h"
+#include "mbedtls/ecjpake.h"
+#include "mbedtls/ecp.h"
+#include "mbedtls/ecp_internal.h"
+#include "mbedtls/entropy.h"
+#include "mbedtls/entropy_poll.h"
+#include "mbedtls/error.h"
+#include "mbedtls/gcm.h"
+#include "mbedtls/havege.h"
+#include "mbedtls/hkdf.h"
+#include "mbedtls/hmac_drbg.h"
+#include "mbedtls/md.h"
+#include "mbedtls/md2.h"
+#include "mbedtls/md4.h"
+#include "mbedtls/md5.h"
+#include "mbedtls/md_internal.h"
+#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
+#include "mbedtls/oid.h"
+#include "mbedtls/padlock.h"
+#include "mbedtls/pem.h"
+#include "mbedtls/pk.h"
+#include "mbedtls/pk_internal.h"
+#include "mbedtls/pkcs11.h"
+#include "mbedtls/pkcs12.h"
+#include "mbedtls/pkcs5.h"
+#include "mbedtls/platform_time.h"
+#include "mbedtls/platform_util.h"
+#include "mbedtls/poly1305.h"
+#include "mbedtls/ripemd160.h"
+#include "mbedtls/rsa.h"
+#include "mbedtls/rsa_internal.h"
+#include "mbedtls/sha1.h"
+#include "mbedtls/sha256.h"
+#include "mbedtls/sha512.h"
+#include "mbedtls/ssl.h"
+#include "mbedtls/ssl_cache.h"
+#include "mbedtls/ssl_ciphersuites.h"
+#include "mbedtls/ssl_cookie.h"
+#include "mbedtls/ssl_internal.h"
+#include "mbedtls/ssl_ticket.h"
+#include "mbedtls/threading.h"
+#include "mbedtls/timing.h"
+#include "mbedtls/version.h"
+#include "mbedtls/x509.h"
+#include "mbedtls/x509_crl.h"
+#include "mbedtls/x509_crt.h"
+#include "mbedtls/x509_csr.h"
+#include "mbedtls/xtea.h"
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#endif
+
+#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
+#include "mbedtls/memory_buffer_alloc.h"
+#endif
+
+int main()
+{
+    mbedtls_platform_context *ctx = NULL;
+    mbedtls_platform_setup(ctx);
+    mbedtls_printf("CPP Build test\n");
+    mbedtls_platform_teardown(ctx);
+}
diff --git a/programs/test/ssl_cert_test.c b/programs/test/ssl_cert_test.c
index 9cfcd2d..fd3526f 100644
--- a/programs/test/ssl_cert_test.c
+++ b/programs/test/ssl_cert_test.c
@@ -29,9 +29,12 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_snprintf   snprintf
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_snprintf        snprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_X509_CRT_PARSE_C) && \
     defined(MBEDTLS_FS_IO) && defined(MBEDTLS_X509_CRL_PARSE_C)
@@ -80,7 +83,8 @@
 
 int main( void )
 {
-    int ret, i;
+    int ret = 1, i;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_x509_crt cacert;
     mbedtls_x509_crl crl;
     char buf[10240];
@@ -210,7 +214,6 @@
         if( ! mbedtls_pk_can_do( &clicert.pk, MBEDTLS_PK_RSA ) )
         {
             mbedtls_printf( " failed\n  !  certificate's key is not RSA\n\n" );
-            ret = MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE;
             goto exit;
         }
 
@@ -241,6 +244,8 @@
         mbedtls_pk_free( &pk );
     }
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_x509_crt_free( &cacert );
     mbedtls_x509_crl_free( &crl );
@@ -250,7 +255,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_RSA_C && MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO &&
           MBEDTLS_X509_CRL_PARSE_C */
diff --git a/programs/test/udp_proxy.c b/programs/test/udp_proxy.c
index 5797f3d..55e0f24 100644
--- a/programs/test/udp_proxy.c
+++ b/programs/test/udp_proxy.c
@@ -37,10 +37,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
-#define mbedtls_time       time
-#define mbedtls_time_t     time_t
-#define mbedtls_printf     printf
-#endif
+#define mbedtls_time            time
+#define mbedtls_time_t          time_t
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_NET_C)
 int main( void )
@@ -600,7 +602,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
 
     mbedtls_net_context listen_fd, client_fd, server_fd;
 
@@ -781,10 +784,12 @@
 
     }
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
 #ifdef MBEDTLS_ERROR_C
-    if( ret != 0 )
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
         char error_buf[100];
         mbedtls_strerror( ret, error_buf, 100 );
@@ -802,7 +807,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret != 0 );
+    return( exit_code );
 }
 
 #endif /* MBEDTLS_NET_C */
diff --git a/programs/util/pem2der.c b/programs/util/pem2der.c
index ad2c6ac..73a9fb5 100644
--- a/programs/util/pem2der.c
+++ b/programs/util/pem2der.c
@@ -29,10 +29,13 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_free       free
-#define mbedtls_calloc    calloc
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_free            free
+#define mbedtls_calloc          calloc
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if defined(MBEDTLS_BASE64_C) && defined(MBEDTLS_FS_IO)
 #include "mbedtls/error.h"
@@ -178,7 +181,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     unsigned char *pem_buffer = NULL;
     unsigned char der_buffer[4096];
     char buf[1024];
@@ -273,6 +277,8 @@
 
     mbedtls_printf( " ok\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     free( pem_buffer );
 
@@ -281,6 +287,6 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BASE64_C && MBEDTLS_FS_IO */
diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c
index c893ca8..c57ecca 100644
--- a/programs/x509/cert_app.c
+++ b/programs/x509/cert_app.c
@@ -30,11 +30,13 @@
 #else
 #include <stdio.h>
 #include <stdlib.h>
-#define mbedtls_time       time
-#define mbedtls_time_t     time_t
-#define mbedtls_fprintf    fprintf
-#define mbedtls_printf     printf
-#endif
+#define mbedtls_time            time
+#define mbedtls_time_t          time_t
+#define mbedtls_fprintf         fprintf
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
     !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
@@ -145,7 +147,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_net_context server_fd;
     unsigned char buf[1024];
     mbedtls_entropy_context entropy;
@@ -180,7 +183,6 @@
     {
     usage:
         mbedtls_printf( USAGE );
-        ret = 2;
         goto exit;
     }
 
@@ -252,19 +254,23 @@
 
     if( strlen( opt.ca_path ) )
     {
-        ret = mbedtls_x509_crt_parse_path( &cacert, opt.ca_path );
+        if( ( ret = mbedtls_x509_crt_parse_path( &cacert, opt.ca_path ) ) < 0 )
+        {
+            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_path returned -0x%x\n\n", -ret );
+            goto exit;
+        }
+
         verify = 1;
     }
     else if( strlen( opt.ca_file ) )
     {
-        ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file );
-        verify = 1;
-    }
+        if( ( ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file ) ) < 0 )
+        {
+            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_file returned -0x%x\n\n", -ret );
+            goto exit;
+        }
 
-    if( ret < 0 )
-    {
-        mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );
-        goto exit;
+        verify = 1;
     }
 
     mbedtls_printf( " ok (%d skipped)\n", ret );
@@ -332,8 +338,6 @@
             cur = cur->next;
         }
 
-        ret = 0;
-
         /*
          * 1.3 Verify the certificate
          */
@@ -470,6 +474,8 @@
     else
         goto usage;
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
     mbedtls_net_free( &server_fd );
@@ -485,10 +491,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    if( ret < 0 )
-        ret = 1;
-
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
           MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 30df216..a32ac50 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_X509_CSR_WRITE_C) || !defined(MBEDTLS_FS_IO) ||  \
     !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_SHA256_C) || \
@@ -133,7 +136,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_pk_context key;
     char buf[1024];
     int i;
@@ -156,7 +160,6 @@
     {
     usage:
         mbedtls_printf( USAGE );
-        ret = 1;
         goto exit;
     }
 
@@ -317,9 +320,11 @@
 
     mbedtls_printf( " ok\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
 
-    if( ret != 0 && ret != 1)
+    if( exit_code != MBEDTLS_EXIT_SUCCESS )
     {
 #ifdef MBEDTLS_ERROR_C
         mbedtls_strerror( ret, buf, sizeof( buf ) );
@@ -339,7 +344,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_X509_CSR_WRITE_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO &&
           MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_PEM_WRITE_C */
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 12baf72..09a91e0 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_X509_CRT_WRITE_C) || \
     !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
@@ -211,7 +214,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     mbedtls_x509_crt issuer_crt;
     mbedtls_pk_context loaded_issuer_key, loaded_subject_key;
     mbedtls_pk_context *issuer_key = &loaded_issuer_key,
@@ -248,7 +252,6 @@
     {
     usage:
         mbedtls_printf( USAGE );
-        ret = 1;
         goto exit;
     }
 
@@ -611,7 +614,6 @@
         {
             mbedtls_printf( " failed\n  !  issuer_key does not match "
                             "issuer certificate\n\n" );
-            ret = -1;
             goto exit;
         }
     }
@@ -784,6 +786,8 @@
 
     mbedtls_printf( " ok\n" );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_x509write_crt_free( &crt );
     mbedtls_pk_free( &loaded_subject_key );
@@ -797,7 +801,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_X509_CRT_WRITE_C && MBEDTLS_X509_CRT_PARSE_C &&
           MBEDTLS_FS_IO && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
diff --git a/programs/x509/crl_app.c b/programs/x509/crl_app.c
index 210d19e..f831683 100644
--- a/programs/x509/crl_app.c
+++ b/programs/x509/crl_app.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
     !defined(MBEDTLS_X509_CRL_PARSE_C) || !defined(MBEDTLS_FS_IO)
@@ -67,7 +70,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     unsigned char buf[100000];
     mbedtls_x509_crl crl;
     int i;
@@ -131,6 +135,8 @@
 
     mbedtls_printf( "%s\n", buf );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_x509_crl_free( &crl );
 
@@ -139,7 +145,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_X509_CRL_PARSE_C &&
           MBEDTLS_FS_IO */
diff --git a/programs/x509/req_app.c b/programs/x509/req_app.c
index 8410a53..0f20c85 100644
--- a/programs/x509/req_app.c
+++ b/programs/x509/req_app.c
@@ -29,8 +29,11 @@
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#define mbedtls_printf     printf
-#endif
+#include <stdlib.h>
+#define mbedtls_printf          printf
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#endif /* MBEDTLS_PLATFORM_C */
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
     !defined(MBEDTLS_X509_CSR_PARSE_C) || !defined(MBEDTLS_FS_IO)
@@ -67,7 +70,8 @@
 
 int main( int argc, char *argv[] )
 {
-    int ret = 0;
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
     unsigned char buf[100000];
     mbedtls_x509_csr csr;
     int i;
@@ -131,6 +135,8 @@
 
     mbedtls_printf( "%s\n", buf );
 
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
 exit:
     mbedtls_x509_csr_free( &csr );
 
@@ -139,7 +145,7 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( ret );
+    return( exit_code );
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_X509_CSR_PARSE_C &&
           MBEDTLS_FS_IO */
diff --git a/tests/compat.sh b/tests/compat.sh
index d383cb4..bf65e5e 100755
--- a/tests/compat.sh
+++ b/tests/compat.sh
@@ -42,6 +42,9 @@
             PEER_GNUTLS=""
         else
             PEER_GNUTLS=" GnuTLS"
+            if [ $MINOR -lt 4 ]; then
+                GNUTLS_MINOR_LT_FOUR='x'
+            fi
         fi
     fi
 else
@@ -58,7 +61,8 @@
 # - RC4, single-DES: requires legacy OpenSSL/GnuTLS versions
 #   avoid plain DES but keep 3DES-EDE-CBC (mbedTLS), DES-CBC3 (OpenSSL)
 # - ARIA: not in default config.h + requires OpenSSL >= 1.1.1
-EXCLUDE='NULL\|DES-CBC-\|RC4\|ARCFOUR\|ARIA'
+# - ChachaPoly: requires OpenSSL >= 1.1.0
+EXCLUDE='NULL\|DES-CBC-\|RC4\|ARCFOUR\|ARIA\|CHACHA20-POLY1305'
 VERBOSE=""
 MEMCHECK=0
 PEERS="OpenSSL$PEER_GNUTLS mbedTLS"
@@ -437,6 +441,9 @@
 # NOTE: for some reason RSA-PSK doesn't work with OpenSSL,
 # so RSA-PSK ciphersuites need to go in other sections, see
 # https://github.com/ARMmbed/mbedtls/issues/1419
+#
+# ChachaPoly suites are here rather than in "common", as they were added in
+# GnuTLS in 3.5.0 and the CI only has 3.4.x so far.
 add_openssl_ciphersuites()
 {
     case $TYPE in
@@ -468,6 +475,7 @@
                     TLS-ECDH-ECDSA-WITH-AES-256-GCM-SHA384          \
                     TLS-ECDHE-ECDSA-WITH-ARIA-256-GCM-SHA384        \
                     TLS-ECDHE-ECDSA-WITH-ARIA-128-GCM-SHA256        \
+                    TLS-ECDHE-ECDSA-WITH-CHACHA20-POLY1305-SHA256   \
                     "
                 O_CIPHERS="$O_CIPHERS               \
                     ECDH-ECDSA-AES128-SHA256        \
@@ -476,6 +484,7 @@
                     ECDH-ECDSA-AES256-GCM-SHA384    \
                     ECDHE-ECDSA-ARIA256-GCM-SHA384  \
                     ECDHE-ECDSA-ARIA128-GCM-SHA256  \
+                    ECDHE-ECDSA-CHACHA20-POLY1305   \
                     "
             fi
             ;;
@@ -498,6 +507,8 @@
                     TLS-ECDHE-RSA-WITH-ARIA-128-GCM-SHA256          \
                     TLS-DHE-RSA-WITH-ARIA-128-GCM-SHA256            \
                     TLS-RSA-WITH-ARIA-128-GCM-SHA256                \
+                    TLS-DHE-RSA-WITH-CHACHA20-POLY1305-SHA256       \
+                    TLS-ECDHE-RSA-WITH-CHACHA20-POLY1305-SHA256     \
                     "
                 O_CIPHERS="$O_CIPHERS               \
                     ECDHE-ARIA256-GCM-SHA384        \
@@ -506,6 +517,8 @@
                     ECDHE-ARIA128-GCM-SHA256        \
                     DHE-RSA-ARIA128-GCM-SHA256      \
                     ARIA128-GCM-SHA256              \
+                    DHE-RSA-CHACHA20-POLY1305       \
+                    ECDHE-RSA-CHACHA20-POLY1305     \
                     "
             fi
             ;;
@@ -518,12 +531,18 @@
                     TLS-DHE-PSK-WITH-ARIA-128-GCM-SHA256            \
                     TLS-PSK-WITH-ARIA-256-GCM-SHA384                \
                     TLS-PSK-WITH-ARIA-128-GCM-SHA256                \
+                    TLS-PSK-WITH-CHACHA20-POLY1305-SHA256           \
+                    TLS-ECDHE-PSK-WITH-CHACHA20-POLY1305-SHA256     \
+                    TLS-DHE-PSK-WITH-CHACHA20-POLY1305-SHA256       \
                     "
                 O_CIPHERS="$O_CIPHERS               \
                     DHE-PSK-ARIA256-GCM-SHA384      \
                     DHE-PSK-ARIA128-GCM-SHA256      \
                     PSK-ARIA256-GCM-SHA384          \
                     PSK-ARIA128-GCM-SHA256          \
+                    DHE-PSK-CHACHA20-POLY1305       \
+                    ECDHE-PSK-CHACHA20-POLY1305     \
+                    PSK-CHACHA20-POLY1305           \
                     "
             fi
             ;;
@@ -545,12 +564,20 @@
                     TLS-ECDHE-ECDSA-WITH-CAMELLIA-256-CBC-SHA384    \
                     TLS-ECDHE-ECDSA-WITH-CAMELLIA-128-GCM-SHA256    \
                     TLS-ECDHE-ECDSA-WITH-CAMELLIA-256-GCM-SHA384    \
+                    TLS-ECDHE-ECDSA-WITH-AES-128-CCM                \
+                    TLS-ECDHE-ECDSA-WITH-AES-256-CCM                \
+                    TLS-ECDHE-ECDSA-WITH-AES-128-CCM-8              \
+                    TLS-ECDHE-ECDSA-WITH-AES-256-CCM-8              \
                    "
                 G_CIPHERS="$G_CIPHERS                               \
                     +ECDHE-ECDSA:+CAMELLIA-128-CBC:+SHA256          \
                     +ECDHE-ECDSA:+CAMELLIA-256-CBC:+SHA384          \
                     +ECDHE-ECDSA:+CAMELLIA-128-GCM:+AEAD            \
                     +ECDHE-ECDSA:+CAMELLIA-256-GCM:+AEAD            \
+                    +ECDHE-ECDSA:+AES-128-CCM:+AEAD                 \
+                    +ECDHE-ECDSA:+AES-256-CCM:+AEAD                 \
+                    +ECDHE-ECDSA:+AES-128-CCM-8:+AEAD               \
+                    +ECDHE-ECDSA:+AES-256-CCM-8:+AEAD               \
                    "
             fi
             ;;
@@ -580,6 +607,14 @@
                     TLS-DHE-RSA-WITH-CAMELLIA-256-GCM-SHA384    \
                     TLS-RSA-WITH-CAMELLIA-128-GCM-SHA256        \
                     TLS-RSA-WITH-CAMELLIA-256-GCM-SHA384        \
+                    TLS-RSA-WITH-AES-128-CCM                    \
+                    TLS-RSA-WITH-AES-256-CCM                    \
+                    TLS-DHE-RSA-WITH-AES-128-CCM                \
+                    TLS-DHE-RSA-WITH-AES-256-CCM                \
+                    TLS-RSA-WITH-AES-128-CCM-8                  \
+                    TLS-RSA-WITH-AES-256-CCM-8                  \
+                    TLS-DHE-RSA-WITH-AES-128-CCM-8              \
+                    TLS-DHE-RSA-WITH-AES-256-CCM-8              \
                     "
                 G_CIPHERS="$G_CIPHERS                           \
                     +ECDHE-RSA:+CAMELLIA-128-CBC:+SHA256        \
@@ -594,6 +629,14 @@
                     +DHE-RSA:+CAMELLIA-256-GCM:+AEAD            \
                     +RSA:+CAMELLIA-128-GCM:+AEAD                \
                     +RSA:+CAMELLIA-256-GCM:+AEAD                \
+                    +RSA:+AES-128-CCM:+AEAD                     \
+                    +RSA:+AES-256-CCM:+AEAD                     \
+                    +RSA:+AES-128-CCM-8:+AEAD                   \
+                    +RSA:+AES-256-CCM-8:+AEAD                   \
+                    +DHE-RSA:+AES-128-CCM:+AEAD                 \
+                    +DHE-RSA:+AES-256-CCM:+AEAD                 \
+                    +DHE-RSA:+AES-128-CCM-8:+AEAD               \
+                    +DHE-RSA:+AES-256-CCM-8:+AEAD               \
                     "
             fi
             ;;
@@ -665,6 +708,14 @@
                     TLS-PSK-WITH-AES-256-GCM-SHA384             \
                     TLS-DHE-PSK-WITH-AES-128-GCM-SHA256         \
                     TLS-DHE-PSK-WITH-AES-256-GCM-SHA384         \
+                    TLS-PSK-WITH-AES-128-CCM                    \
+                    TLS-PSK-WITH-AES-256-CCM                    \
+                    TLS-DHE-PSK-WITH-AES-128-CCM                \
+                    TLS-DHE-PSK-WITH-AES-256-CCM                \
+                    TLS-PSK-WITH-AES-128-CCM-8                  \
+                    TLS-PSK-WITH-AES-256-CCM-8                  \
+                    TLS-DHE-PSK-WITH-AES-128-CCM-8              \
+                    TLS-DHE-PSK-WITH-AES-256-CCM-8              \
                     TLS-RSA-PSK-WITH-CAMELLIA-128-GCM-SHA256    \
                     TLS-RSA-PSK-WITH-CAMELLIA-256-GCM-SHA384    \
                     TLS-PSK-WITH-CAMELLIA-128-GCM-SHA256        \
@@ -695,6 +746,14 @@
                     +PSK:+AES-256-GCM:+AEAD                     \
                     +DHE-PSK:+AES-128-GCM:+AEAD                 \
                     +DHE-PSK:+AES-256-GCM:+AEAD                 \
+                    +PSK:+AES-128-CCM:+AEAD                     \
+                    +PSK:+AES-256-CCM:+AEAD                     \
+                    +DHE-PSK:+AES-128-CCM:+AEAD                 \
+                    +DHE-PSK:+AES-256-CCM:+AEAD                 \
+                    +PSK:+AES-128-CCM-8:+AEAD                   \
+                    +PSK:+AES-256-CCM-8:+AEAD                   \
+                    +DHE-PSK:+AES-128-CCM-8:+AEAD               \
+                    +DHE-PSK:+AES-256-CCM-8:+AEAD               \
                     +RSA-PSK:+CAMELLIA-128-GCM:+AEAD            \
                     +RSA-PSK:+CAMELLIA-256-GCM:+AEAD            \
                     +PSK:+CAMELLIA-128-GCM:+AEAD                \
@@ -737,10 +796,6 @@
                 M_CIPHERS="$M_CIPHERS                               \
                     TLS-ECDH-ECDSA-WITH-CAMELLIA-128-GCM-SHA256     \
                     TLS-ECDH-ECDSA-WITH-CAMELLIA-256-GCM-SHA384     \
-                    TLS-ECDHE-ECDSA-WITH-AES-128-CCM                \
-                    TLS-ECDHE-ECDSA-WITH-AES-256-CCM                \
-                    TLS-ECDHE-ECDSA-WITH-AES-128-CCM-8              \
-                    TLS-ECDHE-ECDSA-WITH-AES-256-CCM-8              \
                     TLS-ECDHE-ECDSA-WITH-ARIA-256-CBC-SHA384        \
                     TLS-ECDHE-ECDSA-WITH-ARIA-128-CBC-SHA256        \
                     TLS-ECDH-ECDSA-WITH-ARIA-256-GCM-SHA384         \
@@ -755,14 +810,6 @@
             if [ `minor_ver "$MODE"` -ge 3 ]
             then
                 M_CIPHERS="$M_CIPHERS                               \
-                    TLS-RSA-WITH-AES-128-CCM                        \
-                    TLS-RSA-WITH-AES-256-CCM                        \
-                    TLS-DHE-RSA-WITH-AES-128-CCM                    \
-                    TLS-DHE-RSA-WITH-AES-256-CCM                    \
-                    TLS-RSA-WITH-AES-128-CCM-8                      \
-                    TLS-RSA-WITH-AES-256-CCM-8                      \
-                    TLS-DHE-RSA-WITH-AES-128-CCM-8                  \
-                    TLS-DHE-RSA-WITH-AES-256-CCM-8                  \
                     TLS-ECDHE-RSA-WITH-ARIA-256-CBC-SHA384          \
                     TLS-DHE-RSA-WITH-ARIA-256-CBC-SHA384            \
                     TLS-ECDHE-RSA-WITH-ARIA-128-CBC-SHA256          \
@@ -789,14 +836,6 @@
             if [ `minor_ver "$MODE"` -ge 3 ]
             then
                 M_CIPHERS="$M_CIPHERS                               \
-                    TLS-PSK-WITH-AES-128-CCM                        \
-                    TLS-PSK-WITH-AES-256-CCM                        \
-                    TLS-DHE-PSK-WITH-AES-128-CCM                    \
-                    TLS-DHE-PSK-WITH-AES-256-CCM                    \
-                    TLS-PSK-WITH-AES-128-CCM-8                      \
-                    TLS-PSK-WITH-AES-256-CCM-8                      \
-                    TLS-DHE-PSK-WITH-AES-128-CCM-8                  \
-                    TLS-DHE-PSK-WITH-AES-256-CCM-8                  \
                     TLS-RSA-PSK-WITH-ARIA-256-CBC-SHA384            \
                     TLS-RSA-PSK-WITH-ARIA-128-CBC-SHA256            \
                     TLS-PSK-WITH-ARIA-256-CBC-SHA384                \
@@ -807,6 +846,7 @@
                     TLS-ECDHE-PSK-WITH-ARIA-128-CBC-SHA256          \
                     TLS-DHE-PSK-WITH-ARIA-256-CBC-SHA384            \
                     TLS-DHE-PSK-WITH-ARIA-128-CBC-SHA256            \
+                    TLS-RSA-PSK-WITH-CHACHA20-POLY1305-SHA256       \
                     "
             fi
             ;;
@@ -842,10 +882,17 @@
             exit 1;
     esac
 
+    # GnuTLS < 3.4 will choke if we try to allow CCM-8
+    if [ -z "${GNUTLS_MINOR_LT_FOUR-}" ]; then
+        G_PRIO_CCM="+AES-256-CCM-8:+AES-128-CCM-8:"
+    else
+        G_PRIO_CCM=""
+    fi
+
     M_SERVER_ARGS="server_port=$PORT server_addr=0.0.0.0 force_version=$MODE arc4=1"
     O_SERVER_ARGS="-accept $PORT -cipher NULL,ALL -$MODE -dhparam data_files/dhparams.pem"
     G_SERVER_ARGS="-p $PORT --http $G_MODE"
-    G_SERVER_PRIO="NORMAL:+ARCFOUR-128:+NULL:+MD5:+PSK:+DHE-PSK:+ECDHE-PSK:+RSA-PSK:-VERS-TLS-ALL:$G_PRIO_MODE"
+    G_SERVER_PRIO="NORMAL:${G_PRIO_CCM}+ARCFOUR-128:+NULL:+MD5:+PSK:+DHE-PSK:+ECDHE-PSK:+RSA-PSK:-VERS-TLS-ALL:$G_PRIO_MODE"
 
     # with OpenSSL 1.0.1h, -www, -WWW and -HTTP break DTLS handshakes
     if is_dtls "$MODE"; then
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index ded43f9..52e196f 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -35,6 +35,7 @@
 #   * GNU Make
 #   * CMake
 #   * GCC and Clang (recent enough for using ASan with gcc and MemSan with clang, or valgrind)
+#   * G++
 #   * arm-gcc and mingw-gcc
 #   * ArmCC 5 and ArmCC 6, unless invoked with --no-armcc
 #   * Yotta build dependencies, unless invoked with --no-yotta
@@ -227,6 +228,14 @@
     done
 }
 
+check_headers_in_cpp () {
+    ls include/mbedtls >headers.txt
+    <programs/test/cpp_dummy_build.cpp sed -n 's/"$//; s!^#include "mbedtls/!!p' |
+    sort |
+    diff headers.txt -
+    rm headers.txt
+}
+
 while [ $# -gt 0 ]; do
     case "$1" in
         --armcc) RUN_ARMCC=1;;
@@ -339,6 +348,7 @@
             echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
             echo "${start_red}FAILED: $failure_count${end_color}$failure_summary"
             echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+            exit 1
         elif [ -z "${1-}" ]; then
             echo "SUCCESS :)"
         fi
@@ -526,6 +536,28 @@
 msg "test: RSA_NO_CRT - RSA-related part of compat.sh (ASan build)" # ~ 3 min
 tests/compat.sh -t RSA
 
+msg "build: small SSL_OUT_CONTENT_LEN (ASan build)"
+cleanup
+cp "$CONFIG_H" "$CONFIG_BAK"
+scripts/config.pl set MBEDTLS_SSL_IN_CONTENT_LEN 16384
+scripts/config.pl set MBEDTLS_SSL_OUT_CONTENT_LEN 4096
+CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
+make
+
+msg "test: small SSL_OUT_CONTENT_LEN - ssl-opt.sh MFL and large packet tests"
+if_build_succeeded tests/ssl-opt.sh -f "Max fragment\|Large packet"
+
+msg "build: small SSL_IN_CONTENT_LEN (ASan build)"
+cleanup
+cp "$CONFIG_H" "$CONFIG_BAK"
+scripts/config.pl set MBEDTLS_SSL_IN_CONTENT_LEN 4096
+scripts/config.pl set MBEDTLS_SSL_OUT_CONTENT_LEN 16384
+CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
+make
+
+msg "test: small SSL_IN_CONTENT_LEN - ssl-opt.sh MFL tests"
+if_build_succeeded tests/ssl-opt.sh -f "Max fragment"
+
 msg "build: cmake, full config, clang" # ~ 50s
 cleanup
 cp "$CONFIG_H" "$CONFIG_BAK"
@@ -543,8 +575,8 @@
 msg "test: compat.sh RC4, DES & NULL (full config)" # ~ 2 min
 if_build_succeeded env OPENSSL_CMD="$OPENSSL_LEGACY" GNUTLS_CLI="$GNUTLS_LEGACY_CLI" GNUTLS_SERV="$GNUTLS_LEGACY_SERV" tests/compat.sh -e '3DES\|DES-CBC3' -f 'NULL\|DES\|RC4\|ARCFOUR'
 
-msg "test: compat.sh ARIA"
-if_build_succeeded env OPENSSL_CMD="$OPENSSL_NEXT" tests/compat.sh -e '^$' -f 'ARIA'
+msg "test: compat.sh ARIA + ChachaPoly"
+if_build_succeeded env OPENSSL_CMD="$OPENSSL_NEXT" tests/compat.sh -e '^$' -f 'ARIA\|CHACHA'
 
 msg "build: make, full config + DEPRECATED_WARNING, gcc -O" # ~ 30s
 cleanup
@@ -584,6 +616,12 @@
 cleanup
 make CC=gcc CFLAGS='-Werror -Wall -Wextra -Os'
 
+msg "test: verify header list in cpp_dummy_build.cpp"
+record_status check_headers_in_cpp
+
+msg "build: Unix make, incremental g++"
+make TEST_CPP=1
+
 # Full configuration build, without platform support, file IO and net sockets.
 # This should catch missing mbedtls_printf definitions, and by disabling file
 # IO, it should catch missing '#include <stdio.h>'
@@ -640,6 +678,7 @@
 scripts/config.pl set MBEDTLS_NO_PLATFORM_ENTROPY # uses syscall() on GNU/Linux
 make CC=gcc CFLAGS='-Werror -Wall -Wextra -O0 -std=c99 -pedantic' lib
 
+# Run max fragment length tests with MFL disabled
 msg "build: default config except MFL extension (ASan build)" # ~ 30s
 cleanup
 cp "$CONFIG_H" "$CONFIG_BAK"
@@ -650,6 +689,18 @@
 msg "test: ssl-opt.sh, MFL-related tests"
 if_build_succeeded tests/ssl-opt.sh -f "Max fragment length"
 
+msg "build: no MFL extension, small SSL_OUT_CONTENT_LEN (ASan build)"
+cleanup
+cp "$CONFIG_H" "$CONFIG_BAK"
+scripts/config.pl unset MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+scripts/config.pl set MBEDTLS_SSL_IN_CONTENT_LEN 16384
+scripts/config.pl set MBEDTLS_SSL_OUT_CONTENT_LEN 4096
+CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
+make
+
+msg "test: MFL tests (disabled MFL extension case) & large packet tests"
+if_build_succeeded tests/ssl-opt.sh -f "Max fragment length\|Large buffer"
+
 msg "build: default config with  MBEDTLS_TEST_NULL_ENTROPY (ASan build)"
 cleanup
 cp "$CONFIG_H" "$CONFIG_BAK"
@@ -700,15 +751,30 @@
 fi
 
 if uname -a | grep -F x86_64 >/dev/null; then
-    msg "build: i386, make, gcc" # ~ 30s
+    # Build once with -O0, to compile out the i386 specific inline assembly
+    msg "build: i386, make, gcc -O0 (ASan build)" # ~ 30s
     cleanup
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra -m32'
+    cp "$CONFIG_H" "$CONFIG_BAK"
+    scripts/config.pl full
+    make CC=gcc CFLAGS='-O0 -Werror -Wall -Wextra -m32 -fsanitize=address'
 
-    msg "test: i386, make, gcc"
+    msg "test: i386, make, gcc -O0 (ASan build)"
+    make test
+
+    # Build again with -O1, to compile in the i386 specific inline assembly
+    msg "build: i386, make, gcc -O1 (ASan build)" # ~ 30s
+    cleanup
+    cp "$CONFIG_H" "$CONFIG_BAK"
+    scripts/config.pl full
+    make CC=gcc CFLAGS='-O1 -Werror -Wall -Wextra -m32 -fsanitize=address'
+
+    msg "test: i386, make, gcc -O1 (ASan build)"
     make test
 
     msg "build: 64-bit ILP32, make, gcc" # ~ 30s
     cleanup
+    cp "$CONFIG_H" "$CONFIG_BAK"
+    scripts/config.pl full
     make CC=gcc CFLAGS='-Werror -Wall -Wextra -mx32'
 
     msg "test: 64-bit ILP32, make, gcc"
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 9faeb67..a1c7d04 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -21,6 +21,11 @@
 
 set -u
 
+if cd $( dirname $0 ); then :; else
+    echo "cd $( dirname $0 ) failed" >&2
+    exit 1
+fi
+
 # default values, can be overriden by the environment
 : ${P_SRV:=../programs/ssl/ssl_server2}
 : ${P_CLI:=../programs/ssl/ssl_client2}
@@ -178,6 +183,25 @@
     fi
 }
 
+# Calculate the input & output maximum content lengths set in the config
+MAX_CONTENT_LEN=$( ../scripts/config.pl get MBEDTLS_SSL_MAX_CONTENT_LEN || echo "16384")
+MAX_IN_LEN=$( ../scripts/config.pl get MBEDTLS_SSL_IN_CONTENT_LEN || echo "$MAX_CONTENT_LEN")
+MAX_OUT_LEN=$( ../scripts/config.pl get MBEDTLS_SSL_OUT_CONTENT_LEN || echo "$MAX_CONTENT_LEN")
+
+if [ "$MAX_IN_LEN" -lt "$MAX_CONTENT_LEN" ]; then
+    MAX_CONTENT_LEN="$MAX_IN_LEN"
+fi
+if [ "$MAX_OUT_LEN" -lt "$MAX_CONTENT_LEN" ]; then
+    MAX_CONTENT_LEN="$MAX_OUT_LEN"
+fi
+
+# skip the next test if the SSL output buffer is less than 16KB
+requires_full_size_output_buffer() {
+    if [ "$MAX_OUT_LEN" -ne 16384 ]; then
+        SKIP_NEXT="YES"
+    fi
+}
+
 # skip the next test if valgrind is in use
 not_with_valgrind() {
     if [ "$MEMCHECK" -gt 0 ]; then
@@ -308,7 +332,7 @@
         done
     }
 else
-    echo "Warning: lsof not available, wait_server_start = sleep $START_DELAY"
+    echo "Warning: lsof not available, wait_server_start = sleep"
     wait_server_start() {
         sleep "$START_DELAY"
     }
@@ -626,11 +650,6 @@
 # MAIN
 #
 
-if cd $( dirname $0 ); then :; else
-    echo "cd $( dirname $0 ) failed" >&2
-    exit 1
-fi
-
 get_options "$@"
 
 # sanity checks, avoid an avalanche of errors
@@ -723,7 +742,7 @@
             "$P_CLI" \
             0 \
             -s "Protocol is TLSv1.2" \
-            -s "Ciphersuite is TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" \
+            -s "Ciphersuite is TLS-ECDHE-RSA-WITH-CHACHA20-POLY1305-SHA256" \
             -s "client hello v3, signature_algorithm ext: 6" \
             -s "ECDHE curve: secp521r1" \
             -S "error" \
@@ -734,20 +753,14 @@
             "$P_CLI dtls=1" \
             0 \
             -s "Protocol is DTLSv1.2" \
-            -s "Ciphersuite is TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384"
+            -s "Ciphersuite is TLS-ECDHE-RSA-WITH-CHACHA20-POLY1305-SHA256"
 
 # Test current time in ServerHello
 requires_config_enabled MBEDTLS_HAVE_TIME
-run_test    "Default, ServerHello contains gmt_unix_time" \
+run_test    "ServerHello contains gmt_unix_time" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3" \
             0 \
-            -s "Protocol is TLSv1.2" \
-            -s "Ciphersuite is TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" \
-            -s "client hello v3, signature_algorithm ext: 6" \
-            -s "ECDHE curve: secp521r1" \
-            -S "error" \
-            -C "error" \
             -f "check_server_hello_time" \
             -F "check_server_hello_time"
 
@@ -1157,6 +1170,38 @@
             -s "received FALLBACK_SCSV" \
             -S "inapropriate fallback"
 
+# Test sending and receiving empty application data records
+
+run_test    "Encrypt then MAC: empty application data record" \
+            "$P_SRV auth_mode=none debug_level=4 etm=1" \
+            "$P_CLI auth_mode=none etm=1 request_size=0 force_ciphersuite=TLS-ECDHE-RSA-WITH-AES-256-CBC-SHA" \
+            0 \
+            -S "0000:  0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f" \
+            -s "dumping 'input payload after decrypt' (0 bytes)" \
+            -c "0 bytes written in 1 fragments"
+
+run_test    "Default, no Encrypt then MAC: empty application data record" \
+            "$P_SRV auth_mode=none debug_level=4 etm=0" \
+            "$P_CLI auth_mode=none etm=0 request_size=0" \
+            0 \
+            -s "dumping 'input payload after decrypt' (0 bytes)" \
+            -c "0 bytes written in 1 fragments"
+
+run_test    "Encrypt then MAC, DTLS: empty application data record" \
+            "$P_SRV auth_mode=none debug_level=4 etm=1 dtls=1" \
+            "$P_CLI auth_mode=none etm=1 request_size=0 force_ciphersuite=TLS-ECDHE-RSA-WITH-AES-256-CBC-SHA dtls=1" \
+            0 \
+            -S "0000:  0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f" \
+            -s "dumping 'input payload after decrypt' (0 bytes)" \
+            -c "0 bytes written in 1 fragments"
+
+run_test    "Default, no Encrypt then MAC, DTLS: empty application data record" \
+            "$P_SRV auth_mode=none debug_level=4 etm=0 dtls=1" \
+            "$P_CLI auth_mode=none etm=0 request_size=0 dtls=1" \
+            0 \
+            -s "dumping 'input payload after decrypt' (0 bytes)" \
+            -c "0 bytes written in 1 fragments"
+
 ## 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.
@@ -1416,28 +1461,22 @@
 
 # Tests for Max Fragment Length extension
 
-MAX_CONTENT_LEN_EXPECT='16384'
-MAX_CONTENT_LEN_CONFIG=$( ../scripts/config.pl get MBEDTLS_SSL_MAX_CONTENT_LEN)
-
-if [ -n "$MAX_CONTENT_LEN_CONFIG" ] && [ "$MAX_CONTENT_LEN_CONFIG" -ne "$MAX_CONTENT_LEN_EXPECT" ]; then
-    printf "The ${CONFIG_H} file contains a value for the configuration of\n"
-    printf "MBEDTLS_SSL_MAX_CONTENT_LEN that is different from the script’s\n"
-    printf "test value of ${MAX_CONTENT_LEN_EXPECT}. \n"
-    printf "\n"
-    printf "The tests assume this value and if it changes, the tests in this\n"
-    printf "script should also be adjusted.\n"
-    printf "\n"
-
+if [ "$MAX_CONTENT_LEN" -lt "4096" ]; then
+    printf "${CONFIG_H} defines MBEDTLS_SSL_MAX_CONTENT_LEN to be less than 4096. Fragment length tests will fail.\n"
     exit 1
 fi
 
+if [ $MAX_CONTENT_LEN -ne 16384 ]; then
+    printf "Using non-default maximum content length $MAX_CONTENT_LEN\n"
+fi
+
 requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 run_test    "Max fragment length: enabled, default" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3" \
             0 \
-            -c "Maximum fragment length is 16384" \
-            -s "Maximum fragment length is 16384" \
+            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum fragment length is $MAX_CONTENT_LEN" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
@@ -1446,46 +1485,50 @@
 requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 run_test    "Max fragment length: enabled, default, larger message" \
             "$P_SRV debug_level=3" \
-            "$P_CLI debug_level=3 request_size=16385" \
+            "$P_CLI debug_level=3 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             0 \
-            -c "Maximum fragment length is 16384" \
-            -s "Maximum fragment length is 16384" \
+            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum fragment length is $MAX_CONTENT_LEN" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
             -C "found max_fragment_length extension" \
-            -c "16385 bytes written in 2 fragments" \
-            -s "16384 bytes read" \
+            -c "$(( $MAX_CONTENT_LEN + 1)) bytes written in 2 fragments" \
+            -s "$MAX_CONTENT_LEN bytes read" \
             -s "1 bytes read"
 
 requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 run_test    "Max fragment length, DTLS: enabled, default, larger message" \
             "$P_SRV debug_level=3 dtls=1" \
-            "$P_CLI debug_level=3 dtls=1 request_size=16385" \
+            "$P_CLI debug_level=3 dtls=1 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             1 \
-            -c "Maximum fragment length is 16384" \
-            -s "Maximum fragment length is 16384" \
+            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum fragment length is $MAX_CONTENT_LEN" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
             -C "found max_fragment_length extension" \
             -c "fragment larger than.*maximum "
 
+# Run some tests with MBEDTLS_SSL_MAX_FRAGMENT_LENGTH disabled
+# (session fragment length will be 16384 regardless of mbedtls
+# content length configuration.)
+
 requires_config_disabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 run_test    "Max fragment length: disabled, larger message" \
             "$P_SRV debug_level=3" \
-            "$P_CLI debug_level=3 request_size=16385" \
+            "$P_CLI debug_level=3 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             0 \
             -C "Maximum fragment length is 16384" \
             -S "Maximum fragment length is 16384" \
-            -c "16385 bytes written in 2 fragments" \
-            -s "16384 bytes read" \
+            -c "$(( $MAX_CONTENT_LEN + 1)) bytes written in 2 fragments" \
+            -s "$MAX_CONTENT_LEN bytes read" \
             -s "1 bytes read"
 
 requires_config_disabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
 run_test    "Max fragment length DTLS: disabled, larger message" \
             "$P_SRV debug_level=3 dtls=1" \
-            "$P_CLI debug_level=3 dtls=1 request_size=16385" \
+            "$P_CLI debug_level=3 dtls=1 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             1 \
             -C "Maximum fragment length is 16384" \
             -S "Maximum fragment length is 16384" \
@@ -1508,7 +1551,7 @@
             "$P_SRV debug_level=3 max_frag_len=4096" \
             "$P_CLI debug_level=3" \
             0 \
-            -c "Maximum fragment length is 16384" \
+            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
             -s "Maximum fragment length is 4096" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
@@ -2376,6 +2419,7 @@
     exit 1
 fi
 
+requires_full_size_output_buffer
 run_test    "Authentication: server max_int chain, client default" \
             "$P_SRV crt_file=data_files/dir-maxpath/c09.pem \
                     key_file=data_files/dir-maxpath/09.key" \
@@ -2383,6 +2427,7 @@
             0 \
             -C "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: server max_int+1 chain, client default" \
             "$P_SRV crt_file=data_files/dir-maxpath/c10.pem \
                     key_file=data_files/dir-maxpath/10.key" \
@@ -2390,6 +2435,7 @@
             1 \
             -c "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: server max_int+1 chain, client optional" \
             "$P_SRV crt_file=data_files/dir-maxpath/c10.pem \
                     key_file=data_files/dir-maxpath/10.key" \
@@ -2398,6 +2444,7 @@
             1 \
             -c "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: server max_int+1 chain, client none" \
             "$P_SRV crt_file=data_files/dir-maxpath/c10.pem \
                     key_file=data_files/dir-maxpath/10.key" \
@@ -2406,6 +2453,7 @@
             0 \
             -C "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: client max_int+1 chain, server default" \
             "$P_SRV ca_file=data_files/dir-maxpath/00.crt" \
             "$P_CLI crt_file=data_files/dir-maxpath/c10.pem \
@@ -2413,6 +2461,7 @@
             0 \
             -S "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: client max_int+1 chain, server optional" \
             "$P_SRV ca_file=data_files/dir-maxpath/00.crt auth_mode=optional" \
             "$P_CLI crt_file=data_files/dir-maxpath/c10.pem \
@@ -2420,6 +2469,7 @@
             1 \
             -s "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: client max_int+1 chain, server required" \
             "$P_SRV ca_file=data_files/dir-maxpath/00.crt auth_mode=required" \
             "$P_CLI crt_file=data_files/dir-maxpath/c10.pem \
@@ -2427,6 +2477,7 @@
             1 \
             -s "X509 - A fatal error occured"
 
+requires_full_size_output_buffer
 run_test    "Authentication: client max_int chain, server required" \
             "$P_SRV ca_file=data_files/dir-maxpath/00.crt auth_mode=required" \
             "$P_CLI crt_file=data_files/dir-maxpath/c09.pem \
@@ -3970,14 +4021,19 @@
 
 # Test for large packets
 
+# How many fragments do we expect to write $1 bytes?
+fragments_for_write() {
+    echo "$(( ( $1 + $MAX_OUT_LEN - 1 ) / $MAX_OUT_LEN ))"
+}
+
 requires_config_enabled MBEDTLS_SSL_PROTO_SSL3
 run_test    "Large packet SSLv3 BlockCipher" \
             "$P_SRV min_version=ssl3" \
             "$P_CLI request_size=16384 force_version=ssl3 recsplit=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_PROTO_SSL3
 run_test    "Large packet SSLv3 StreamCipher" \
@@ -3985,23 +4041,23 @@
             "$P_CLI request_size=16384 force_version=ssl3 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.0 BlockCipher" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1 recsplit=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.0 BlockCipher, without EtM" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1 etm=0 recsplit=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.0 BlockCipher, truncated MAC" \
@@ -4009,8 +4065,8 @@
             "$P_CLI request_size=16384 force_version=tls1 recsplit=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA trunc_hmac=1" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.0 BlockCipher, without EtM, truncated MAC" \
@@ -4018,21 +4074,21 @@
             "$P_CLI request_size=16384 force_version=tls1 etm=0 recsplit=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA trunc_hmac=1" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.0 StreamCipher" \
             "$P_SRV arc4=1 force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             "$P_CLI request_size=16384 force_version=tls1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.0 StreamCipher, without EtM" \
             "$P_SRV arc4=1 force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             "$P_CLI request_size=16384 force_version=tls1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA etm=0" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.0 StreamCipher, truncated MAC" \
@@ -4040,7 +4096,7 @@
             "$P_CLI request_size=16384 force_version=tls1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA trunc_hmac=1" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.0 StreamCipher, without EtM, truncated MAC" \
@@ -4048,23 +4104,23 @@
             "$P_CLI request_size=16384 force_version=tls1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA trunc_hmac=1 etm=0" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.1 BlockCipher" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.1 BlockCipher, without EtM" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_1 etm=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.1 BlockCipher, truncated MAC" \
@@ -4072,7 +4128,7 @@
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA trunc_hmac=1" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.1 BlockCipher, without EtM, truncated MAC" \
@@ -4080,23 +4136,23 @@
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA trunc_hmac=1 etm=0" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.1 StreamCipher" \
             "$P_SRV arc4=1 force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.1 StreamCipher, without EtM" \
             "$P_SRV arc4=1 force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA etm=0" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.1 StreamCipher, truncated MAC" \
@@ -4104,7 +4160,7 @@
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA trunc_hmac=1" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.1 StreamCipher, without EtM, truncated MAC" \
@@ -4112,31 +4168,31 @@
             "$P_CLI request_size=16384 force_version=tls1_1 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA trunc_hmac=1 etm=0" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 BlockCipher" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 BlockCipher, without EtM" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_2 etm=0 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 BlockCipher larger MAC" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-ECDHE-RSA-WITH-AES-256-CBC-SHA384" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.2 BlockCipher, truncated MAC" \
@@ -4144,7 +4200,7 @@
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA trunc_hmac=1" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.2 BlockCipher, without EtM, truncated MAC" \
@@ -4152,23 +4208,23 @@
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CBC-SHA trunc_hmac=1 etm=0" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 StreamCipher" \
             "$P_SRV arc4=1 force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 StreamCipher, without EtM" \
             "$P_SRV arc4=1 force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA" \
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA etm=0" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.2 StreamCipher, truncated MAC" \
@@ -4176,7 +4232,7 @@
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA trunc_hmac=1" \
             0 \
-            -s "Read from client: 16384 bytes read"
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 requires_config_enabled MBEDTLS_SSL_TRUNCATED_HMAC
 run_test    "Large packet TLS 1.2 StreamCipher, without EtM, truncated MAC" \
@@ -4184,24 +4240,24 @@
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-RC4-128-SHA trunc_hmac=1 etm=0" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 AEAD" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CCM" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 run_test    "Large packet TLS 1.2 AEAD shorter tag" \
             "$P_SRV" \
             "$P_CLI request_size=16384 force_version=tls1_2 \
              force_ciphersuite=TLS-RSA-WITH-AES-256-CCM-8" \
             0 \
-            -c "16384 bytes written in 1 fragments" \
-            -s "Read from client: 16384 bytes read"
+            -c "16384 bytes written in $(fragments_for_write 16384) fragments" \
+            -s "Read from client: $MAX_CONTENT_LEN bytes read"
 
 # Tests of asynchronous private key support in SSL
 
diff --git a/tests/suites/test_suite_aria.data b/tests/suites/test_suite_aria.data
index 46c6ecc..8cb2d2a 100644
--- a/tests/suites/test_suite_aria.data
+++ b/tests/suites/test_suite_aria.data
@@ -93,3 +93,6 @@
 
 ARIA-256-CFB128 Decrypt - Official Test Vectors 1.0
 aria_decrypt_cfb128:"00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff":"0f1e2d3c4b5a69788796a5b4c3d2e1f0":"26834705b0f2c0e2588d4a7f09009635f28bb93d8c31f870ec1e0bdb082b66fa402dd9c202be300c4517d196b14d4ce11dce97f7aaba54341b0d872cc9b63753a3e8556a14be6f7b3e27e3cfc39caf80f2a355aa50dc83c09c7b11828694f8e4aa726c528976b53f2c877f4991a3a8d28adb63bd751846ffb2350265e179d4990753ae8485ff9b4133ddad5875b84a90cbcfa62a045d726df71b6bda0eeca0be":"11111111aaaaaaaa11111111bbbbbbbb11111111cccccccc11111111dddddddd22222222aaaaaaaa22222222bbbbbbbb22222222cccccccc22222222dddddddd33333333aaaaaaaa33333333bbbbbbbb33333333cccccccc33333333dddddddd44444444aaaaaaaa44444444bbbbbbbb44444444cccccccc44444444dddddddd55555555aaaaaaaa55555555bbbbbbbb55555555cccccccc55555555dddddddd":0
+
+ARIA Selftest
+aria_selftest:
diff --git a/tests/suites/test_suite_dhm.data b/tests/suites/test_suite_dhm.data
index e351ebd..734fd97 100644
--- a/tests/suites/test_suite_dhm.data
+++ b/tests/suites/test_suite_dhm.data
@@ -19,10 +19,10 @@
 Diffie-Hellman zero modulus
 dhm_do_dhm:10:"0":10:"5":MBEDTLS_ERR_DHM_BAD_INPUT_DATA
 
-Diffie-Hallman load parameters from file
+Diffie-Hellman load parameters from file
 dhm_file:"data_files/dhparams.pem":"9e35f430443a09904f3a39a979797d070df53378e79c2438bef4e761f3c714553328589b041c809be1d6c6b5f1fc9f47d3a25443188253a992a56818b37ba9de5a40d362e56eff0be5417474c125c199272c8fe41dea733df6f662c92ae76556e755d10c64e6a50968f67fc6ea73d0dca8569be2ba204e23580d8bca2f4975b3":"02":128
 
-Diffie-Hallman load parameters from file
+Diffie-Hellman load parameters from file
 dhm_file:"data_files/dh.optlen.pem":"b3126aeaf47153c7d67f403030b292b5bd5a6c9eae1c137af34087fce2a36a578d70c5c560ad2bdb924c4a4dbee20a1671be7103ce87defa76908936803dbeca60c33e1289c1a03ac2c6c4e49405e5902fa0596a1cbaa895cc402d5213ed4a5f1f5ba8b5e1ed3da951a4c475afeb0ca660b7368c38c8e809f382d96ae19e60dc984e61cb42b5dfd723322acf327f9e413cda6400c15c5b2ea1fa34405d83982fba40e6d852da3d91019bf23511314254dc211a90833e5b1798ee52a78198c555644729ad92f060367c74ded37704adfc273a4a33fec821bd2ebd3bc051730e97a4dd14d2b766062592f5eec09d16bb50efebf2cc00dd3e0e3418e60ec84870f7":"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":256
 
 Diffie-Hellman selftest