Merge pull request #3163 from AndrzejKurek/variable-buffers-renegotiation

Variable buffers & renegotiation - fixes

ChangeLog

@@ -5,6 +5,10 @@ mbed TLS ChangeLog (Sorted per branch, date)
 New deprecations
    * Deprecate MBEDTLS_SSL_HW_RECORD_ACCEL that enables function hooks in the
      SSL module for hardware acceleration of individual records.
+   * Deprecate mbedtls_ssl_get_max_frag_len() in favour of
+     mbedtls_ssl_get_output_max_frag_len() and
+     mbedtls_ssl_get_input_max_frag_len() to be more precise about which max
+     fragment length is desired.
 
 Security
    * Fix issue in DTLS handling of new associations with the same parameters
@@ -23,6 +27,11 @@ Bugfix
 Changes
    * Mbed Crypto is no longer a Git submodule. The crypto part of the library
      is back directly in the present repository.
+   * Split mbedtls_ssl_get_max_frag_len() into
+     mbedtls_ssl_get_output_max_frag_len() and
+     mbedtls_ssl_get_input_max_frag_len() to ensure that a sufficient input
+     buffer is allocated by the server (if MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
+     is defined), regardless of what MFL was configured for it.
 
 = mbed TLS 2.21.0 branch released 2020-02-20
 

include/mbedtls/ssl.h

@@ -3523,18 +3523,61 @@ int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl );
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
 /**
- * \brief          Return the maximum fragment length (payload, in bytes).
+ * \brief          Return the maximum fragment length (payload, in bytes) for
- *                 This is the value negotiated with peer if any,
+ *                 the output buffer. For the client, this is the configured
- *                 or the locally configured value.
+ *                 value. For the server, it is the minimum of two - the
+ *                 configured value and the negotiated one.
  *
  * \sa             mbedtls_ssl_conf_max_frag_len()
  * \sa             mbedtls_ssl_get_max_record_payload()
  *
  * \param ssl      SSL context
  *
- * \return         Current maximum fragment length.
+ * \return         Current maximum fragment length for the output buffer.
  */
-size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl );
+size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl );
+
+/**
+ * \brief          Return the maximum fragment length (payload, in bytes) for
+ *                 the input buffer. This is the negotiated maximum fragment
+ *                 length, or, if there is none, MBEDTLS_SSL_MAX_CONTENT_LEN.
+ *                 If it is not defined either, the value is 2^14. This function
+ *                 works as its predecessor, \c mbedtls_ssl_get_max_frag_len().
+ *
+ * \sa             mbedtls_ssl_conf_max_frag_len()
+ * \sa             mbedtls_ssl_get_max_record_payload()
+ *
+ * \param ssl      SSL context
+ *
+ * \return         Current maximum fragment length for the output buffer.
+ */
+size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl );
+
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#define MBEDTLS_DEPRECATED    __attribute__((deprecated))
+#else
+#define MBEDTLS_DEPRECATED
+#endif
+
+/**
+ * \brief          This function is a deprecated approach to getting the max
+ *                 fragment length. Its an alias for
+ *                 \c mbedtls_ssl_get_output_max_frag_len(), as the behaviour
+ *                 is the same. See \c mbedtls_ssl_get_output_max_frag_len() for
+ *                 more detail.
+ *
+ * \sa             mbedtls_ssl_get_input_max_frag_len()
+ * \sa             mbedtls_ssl_get_output_max_frag_len()
+ *
+ * \param ssl      SSL context
+ *
+ * \return         Current maximum fragment length for the output buffer.
+ */
+MBEDTLS_DEPRECATED size_t mbedtls_ssl_get_max_frag_len(
+                                        const mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_DEPRECATED_REMOVED */
 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
 
 /**
@@ -3555,7 +3598,8 @@ size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl );
  *                 when record compression is enabled.
  *
  * \sa             mbedtls_ssl_set_mtu()
- * \sa             mbedtls_ssl_get_max_frag_len()
+ * \sa             mbedtls_ssl_get_output_max_frag_len()
+ * \sa             mbedtls_ssl_get_input_max_frag_len()
  * \sa             mbedtls_ssl_get_record_expansion()
  *
  * \param ssl      SSL context
@@ -3863,8 +3907,8 @@ int mbedtls_ssl_read( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
  *                 or negotiated with the peer), then:
  *                 - with TLS, less bytes than requested are written.
  *                 - with DTLS, MBEDTLS_ERR_SSL_BAD_INPUT_DATA is returned.
- *                 \c mbedtls_ssl_get_max_frag_len() may be used to query the
+ *                 \c mbedtls_ssl_get_output_max_frag_len() may be used to
- *                 active maximum fragment length.
+ *                 query the active maximum fragment length.
  *
  * \note           Attempting to write 0 bytes will result in an empty TLS
  *                 application record being sent.

include/mbedtls/ssl_internal.h

@@ -260,11 +260,11 @@
 static inline uint32_t mbedtls_ssl_get_output_buflen( const mbedtls_ssl_context *ctx )
 {
 #if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID)
-    return (uint32_t) mbedtls_ssl_get_max_frag_len( ctx )
+    return (uint32_t) mbedtls_ssl_get_output_max_frag_len( ctx )
                + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD
                + MBEDTLS_SSL_CID_OUT_LEN_MAX;
 #else
-    return (uint32_t) mbedtls_ssl_get_max_frag_len( ctx )
+    return (uint32_t) mbedtls_ssl_get_output_max_frag_len( ctx )
                + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
 #endif
 }
@@ -272,11 +272,11 @@ static inline uint32_t mbedtls_ssl_get_output_buflen( const mbedtls_ssl_context
 static inline uint32_t mbedtls_ssl_get_input_buflen( const mbedtls_ssl_context *ctx )
 {
 #if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID)
-    return (uint32_t) mbedtls_ssl_get_max_frag_len( ctx )
+    return (uint32_t) mbedtls_ssl_get_input_max_frag_len( ctx )
                + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD
                + MBEDTLS_SSL_CID_IN_LEN_MAX;
 #else
-    return (uint32_t) mbedtls_ssl_get_max_frag_len( ctx )
+    return (uint32_t) mbedtls_ssl_get_input_max_frag_len( ctx )
                + MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
 #endif
 }

library/ssl_msg.c

@@ -214,7 +214,7 @@ static int ssl_get_remaining_payload_in_datagram( mbedtls_ssl_context const *ssl
     size_t max_len = MBEDTLS_SSL_OUT_CONTENT_LEN;
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-    const size_t mfl = mbedtls_ssl_get_max_frag_len( ssl );
+    const size_t mfl = mbedtls_ssl_get_output_max_frag_len( ssl );
 
     if( max_len > mfl )
         max_len = mfl;

library/ssl_tls.c

@@ -3673,36 +3673,51 @@ static int ssl_handshake_init( mbedtls_ssl_context *ssl )
     /* If the buffers are too small - reallocate */
     {
         int modified = 0;
-        if( ssl->in_buf_len < MBEDTLS_SSL_IN_BUFFER_LEN )
+        size_t written_in = 0;
+        size_t written_out = 0;
+        if( ssl->in_buf != NULL )
         {
-            if( resize_buffer( &ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_LEN,
+            written_in = ssl->in_msg - ssl->in_buf;
-                               &ssl->in_buf_len ) != 0 )
+            if( ssl->in_buf_len < MBEDTLS_SSL_IN_BUFFER_LEN )
             {
-                MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) );
+                if( resize_buffer( &ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_LEN,
-            }
+                                   &ssl->in_buf_len ) != 0 )
-            else
+                {
-            {
+                    MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) );
-                MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %d", MBEDTLS_SSL_IN_BUFFER_LEN ) );
+                }
-                modified = 1;
+                else
+                {
+                    MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %d", MBEDTLS_SSL_IN_BUFFER_LEN ) );
+                    modified = 1;
+                }
             }
         }
-        if( ssl->out_buf_len < MBEDTLS_SSL_OUT_BUFFER_LEN )
+
+        if( ssl->out_buf != NULL )
         {
-            if( resize_buffer( &ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN,
+            written_out = ssl->out_msg - ssl->out_buf;
-                               &ssl->out_buf_len ) != 0 )
+            if( ssl->out_buf_len < MBEDTLS_SSL_OUT_BUFFER_LEN )
             {
-                MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) );
+                if( resize_buffer( &ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN,
-            }
+                                   &ssl->out_buf_len ) != 0 )
-            else
+                {
-            {
+                    MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) );
-                MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %d", MBEDTLS_SSL_OUT_BUFFER_LEN ) );
+                }
-                modified = 1;
+                else
+                {
+                    MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %d", MBEDTLS_SSL_OUT_BUFFER_LEN ) );
+                    modified = 1;
+                }
             }
         }
         if( modified )
         {
             /* Update pointers here to avoid doing it twice. */
             mbedtls_ssl_reset_in_out_pointers( ssl );
+            /* Fields below might not be properly updated with record
+            * splitting, so they are manually updated here. */
+            ssl->out_msg = ssl->out_buf + written_out;
+            ssl->in_msg = ssl->in_buf + written_in;
         }
     }
 #endif
@@ -4889,7 +4904,42 @@ const char *mbedtls_ssl_get_version( const mbedtls_ssl_context *ssl )
 }
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
+size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl )
+{
+    size_t max_len = MBEDTLS_SSL_MAX_CONTENT_LEN;
+    size_t read_mfl;
+
+    /* Use the configured MFL for the client if we're past SERVER_HELLO_DONE */
+    if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
+        ssl->state >= MBEDTLS_SSL_SERVER_HELLO_DONE )
+    {
+        return ssl_mfl_code_to_length( ssl->conf->mfl_code );
+    }
+
+    /* Check if a smaller max length was negotiated */
+    if( ssl->session_out != NULL )
+    {
+        read_mfl = ssl_mfl_code_to_length( ssl->session_out->mfl_code );
+        if( read_mfl < max_len )
+        {
+            max_len = read_mfl;
+        }
+    }
+
+    // During a handshake, use the value being negotiated
+    if( ssl->session_negotiate != NULL )
+    {
+        read_mfl = ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code );
+        if( read_mfl < max_len )
+        {
+            max_len = read_mfl;
+        }
+    }
+
+    return( max_len );
+}
+
+size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl )
 {
     size_t max_len;
 
@@ -4914,6 +4964,13 @@ size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
 
     return( max_len );
 }
+
+#if !defined(MBEDTLS_DEPRECATED_REMOVED)
+size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
+{
+    return mbedtls_ssl_get_output_max_frag_len( ssl );
+}
+#endif /* !MBEDTLS_DEPRECATED_REMOVED */
 #endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
@@ -4946,7 +5003,7 @@ int mbedtls_ssl_get_max_out_record_payload( const mbedtls_ssl_context *ssl )
 #endif
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-    const size_t mfl = mbedtls_ssl_get_max_frag_len( ssl );
+    const size_t mfl = mbedtls_ssl_get_output_max_frag_len( ssl );
 
     if( max_len > mfl )
         max_len = mfl;
@@ -5892,36 +5949,41 @@ void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl )
         uint32_t buf_len = mbedtls_ssl_get_input_buflen( ssl );
         size_t written_in = 0;
         size_t written_out = 0;
-        if( ssl->in_buf != NULL &&
+        if( ssl->in_buf != NULL )
-            ssl->in_buf_len > buf_len &&
-            ssl->in_left < buf_len )
         {
             written_in = ssl->in_msg - ssl->in_buf;
-            if( resize_buffer( &ssl->in_buf, buf_len, &ssl->in_buf_len ) != 0 )
+            if( ssl->in_buf_len > buf_len && ssl->in_left < buf_len )
             {
-                MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) );
+                written_in = ssl->in_msg - ssl->in_buf;
-            }
+                if( resize_buffer( &ssl->in_buf, buf_len, &ssl->in_buf_len ) != 0 )
-            else
+                {
-            {
+                    MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) );
-                MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %d", buf_len ) );
+                }
-                modified = 1;
+                else
+                {
+                    MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %d", buf_len ) );
+                    modified = 1;
+                }
             }
         }
 
+
         buf_len = mbedtls_ssl_get_output_buflen( ssl );
-        if( ssl->out_buf != NULL &&
+        if(ssl->out_buf != NULL )
-            ssl->out_buf_len > mbedtls_ssl_get_output_buflen( ssl ) &&
-            ssl->out_left < buf_len )
         {
             written_out = ssl->out_msg - ssl->out_buf;
-            if( resize_buffer( &ssl->out_buf, buf_len, &ssl->out_buf_len ) != 0 )
+            if( ssl->out_buf_len > mbedtls_ssl_get_output_buflen( ssl ) &&
+                ssl->out_left < buf_len )
             {
-                MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) );
+                if( resize_buffer( &ssl->out_buf, buf_len, &ssl->out_buf_len ) != 0 )
-            }
+                {
-            else
+                    MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) );
-            {
+                }
-                MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %d", buf_len ) );
+                else
-                modified = 1;
+                {
+                    MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %d", buf_len ) );
+                    modified = 1;
+                }
             }
         }
         if( modified )

programs/ssl/ssl_client2.c

@@ -2553,8 +2553,10 @@ int main( int argc, char *argv[] )
         mbedtls_printf( "    [ Record expansion is unknown (compression) ]\n" );
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-    mbedtls_printf( "    [ Maximum fragment length is %u ]\n",
+    mbedtls_printf( "    [ Maximum input fragment length is %u ]\n",
-                    (unsigned int) mbedtls_ssl_get_max_frag_len( &ssl ) );
+                    (unsigned int) mbedtls_ssl_get_input_max_frag_len( &ssl ) );
+    mbedtls_printf( "    [ Maximum output fragment length is %u ]\n",
+                    (unsigned int) mbedtls_ssl_get_output_max_frag_len( &ssl ) );
 #endif
 
 #if defined(MBEDTLS_SSL_ALPN)

programs/ssl/ssl_server2.c

@@ -3633,8 +3633,10 @@ handshake:
         mbedtls_printf( "    [ Record expansion is unknown (compression) ]\n" );
 
 #if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-    mbedtls_printf( "    [ Maximum fragment length is %u ]\n",
+    mbedtls_printf( "    [ Maximum input fragment length is %u ]\n",
-                    (unsigned int) mbedtls_ssl_get_max_frag_len( &ssl ) );
+                    (unsigned int) mbedtls_ssl_get_input_max_frag_len( &ssl ) );
+    mbedtls_printf( "    [ Maximum output fragment length is %u ]\n",
+                    (unsigned int) mbedtls_ssl_get_output_max_frag_len( &ssl ) );
 #endif
 
 #if defined(MBEDTLS_SSL_ALPN)

tests/ssl-opt.sh

@@ -2925,8 +2925,10 @@ run_test    "Max fragment length: enabled, default" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3" \
             0 \
-            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-            -s "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum output fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum input fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum output fragment length is $MAX_CONTENT_LEN" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
@@ -2937,8 +2939,10 @@ run_test    "Max fragment length: enabled, default, larger message" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             0 \
-            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-            -s "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum output fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum input fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum output fragment length is $MAX_CONTENT_LEN" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
@@ -2952,8 +2956,10 @@ run_test    "Max fragment length, DTLS: enabled, default, larger message" \
             "$P_SRV debug_level=3 dtls=1" \
             "$P_CLI debug_level=3 dtls=1 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             1 \
-            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-            -s "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum output fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum input fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum output fragment length is $MAX_CONTENT_LEN" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
@@ -2969,8 +2975,10 @@ run_test    "Max fragment length: disabled, larger message" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3 request_size=$(( $MAX_CONTENT_LEN + 1))" \
             0 \
-            -C "Maximum fragment length is 16384" \
+            -C "Maximum input fragment length is 16384" \
-            -S "Maximum fragment length is 16384" \
+            -C "Maximum output fragment length is 16384" \
+            -S "Maximum input fragment length is 16384" \
+            -S "Maximum output fragment length is 16384" \
             -c "$(( $MAX_CONTENT_LEN + 1)) bytes written in 2 fragments" \
             -s "$MAX_CONTENT_LEN bytes read" \
             -s "1 bytes read"
@@ -2980,8 +2988,10 @@ 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=$(( $MAX_CONTENT_LEN + 1))" \
             1 \
-            -C "Maximum fragment length is 16384" \
+            -C "Maximum input fragment length is 16384" \
-            -S "Maximum fragment length is 16384" \
+            -C "Maximum output fragment length is 16384" \
+            -S "Maximum input fragment length is 16384" \
+            -S "Maximum output fragment length is 16384" \
             -c "fragment larger than.*maximum "
 
 requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
@@ -2989,8 +2999,178 @@ run_test    "Max fragment length: used by client" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3 max_frag_len=4096" \
             0 \
-            -c "Maximum fragment length is 4096" \
+            -c "Maximum input fragment length is 4096" \
-            -s "Maximum fragment length is 4096" \
+            -c "Maximum output fragment length is 4096" \
+            -s "Maximum input fragment length is 4096" \
+            -s "Maximum output fragment length is 4096" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 512, server 1024" \
+            "$P_SRV debug_level=3 max_frag_len=1024" \
+            "$P_CLI debug_level=3 max_frag_len=512" \
+            0 \
+            -c "Maximum input fragment length is 512" \
+            -c "Maximum output fragment length is 512" \
+            -s "Maximum input fragment length is 512" \
+            -s "Maximum output fragment length is 512" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 512, server 2048" \
+            "$P_SRV debug_level=3 max_frag_len=2048" \
+            "$P_CLI debug_level=3 max_frag_len=512" \
+            0 \
+            -c "Maximum input fragment length is 512" \
+            -c "Maximum output fragment length is 512" \
+            -s "Maximum input fragment length is 512" \
+            -s "Maximum output fragment length is 512" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 512, server 4096" \
+            "$P_SRV debug_level=3 max_frag_len=4096" \
+            "$P_CLI debug_level=3 max_frag_len=512" \
+            0 \
+            -c "Maximum input fragment length is 512" \
+            -c "Maximum output fragment length is 512" \
+            -s "Maximum input fragment length is 512" \
+            -s "Maximum output fragment length is 512" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 1024, server 512" \
+            "$P_SRV debug_level=3 max_frag_len=512" \
+            "$P_CLI debug_level=3 max_frag_len=1024" \
+            0 \
+            -c "Maximum input fragment length is 1024" \
+            -c "Maximum output fragment length is 1024" \
+            -s "Maximum input fragment length is 1024" \
+            -s "Maximum output fragment length is 512" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 1024, server 2048" \
+            "$P_SRV debug_level=3 max_frag_len=2048" \
+            "$P_CLI debug_level=3 max_frag_len=1024" \
+            0 \
+            -c "Maximum input fragment length is 1024" \
+            -c "Maximum output fragment length is 1024" \
+            -s "Maximum input fragment length is 1024" \
+            -s "Maximum output fragment length is 1024" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 1024, server 4096" \
+            "$P_SRV debug_level=3 max_frag_len=4096" \
+            "$P_CLI debug_level=3 max_frag_len=1024" \
+            0 \
+            -c "Maximum input fragment length is 1024" \
+            -c "Maximum output fragment length is 1024" \
+            -s "Maximum input fragment length is 1024" \
+            -s "Maximum output fragment length is 1024" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 2048, server 512" \
+            "$P_SRV debug_level=3 max_frag_len=512" \
+            "$P_CLI debug_level=3 max_frag_len=2048" \
+            0 \
+            -c "Maximum input fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 512" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 2048, server 1024" \
+            "$P_SRV debug_level=3 max_frag_len=1024" \
+            "$P_CLI debug_level=3 max_frag_len=2048" \
+            0 \
+            -c "Maximum input fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 1024" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 2048, server 4096" \
+            "$P_SRV debug_level=3 max_frag_len=4096" \
+            "$P_CLI debug_level=3 max_frag_len=2048" \
+            0 \
+            -c "Maximum input fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 2048" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 4096, server 512" \
+            "$P_SRV debug_level=3 max_frag_len=512" \
+            "$P_CLI debug_level=3 max_frag_len=4096" \
+            0 \
+            -c "Maximum input fragment length is 4096" \
+            -c "Maximum output fragment length is 4096" \
+            -s "Maximum input fragment length is 4096" \
+            -s "Maximum output fragment length is 512" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 4096, server 1024" \
+            "$P_SRV debug_level=3 max_frag_len=1024" \
+            "$P_CLI debug_level=3 max_frag_len=4096" \
+            0 \
+            -c "Maximum input fragment length is 4096" \
+            -c "Maximum output fragment length is 4096" \
+            -s "Maximum input fragment length is 4096" \
+            -s "Maximum output fragment length is 1024" \
+            -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"
+
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Max fragment length: client 4096, server 2048" \
+            "$P_SRV debug_level=3 max_frag_len=2048" \
+            "$P_CLI debug_level=3 max_frag_len=4096" \
+            0 \
+            -c "Maximum input fragment length is 4096" \
+            -c "Maximum output fragment length is 4096" \
+            -s "Maximum input fragment length is 4096" \
+            -s "Maximum output fragment length is 2048" \
             -c "client hello, adding max_fragment_length extension" \
             -s "found max fragment length extension" \
             -s "server hello, max_fragment_length extension" \
@@ -3001,8 +3181,10 @@ run_test    "Max fragment length: used by server" \
             "$P_SRV debug_level=3 max_frag_len=4096" \
             "$P_CLI debug_level=3" \
             0 \
-            -c "Maximum fragment length is $MAX_CONTENT_LEN" \
+            -c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-            -s "Maximum fragment length is 4096" \
+            -c "Maximum output fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum input fragment length is $MAX_CONTENT_LEN" \
+            -s "Maximum output fragment length is 4096" \
             -C "client hello, adding max_fragment_length extension" \
             -S "found max fragment length extension" \
             -S "server hello, max_fragment_length extension" \
@@ -3014,7 +3196,8 @@ run_test    "Max fragment length: gnutls server" \
             "$G_SRV" \
             "$P_CLI debug_level=3 max_frag_len=4096" \
             0 \
-            -c "Maximum fragment length is 4096" \
+            -c "Maximum input fragment length is 4096" \
+            -c "Maximum output fragment length is 4096" \
             -c "client hello, adding max_fragment_length extension" \
             -c "found max_fragment_length extension"
 
@@ -3023,8 +3206,10 @@ run_test    "Max fragment length: client, message just fits" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3 max_frag_len=2048 request_size=2048" \
             0 \
-            -c "Maximum fragment length is 2048" \
+            -c "Maximum input fragment length is 2048" \
-            -s "Maximum fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 2048" \
             -c "client hello, adding max_fragment_length extension" \
             -s "found max fragment length extension" \
             -s "server hello, max_fragment_length extension" \
@@ -3037,8 +3222,10 @@ run_test    "Max fragment length: client, larger message" \
             "$P_SRV debug_level=3" \
             "$P_CLI debug_level=3 max_frag_len=2048 request_size=2345" \
             0 \
-            -c "Maximum fragment length is 2048" \
+            -c "Maximum input fragment length is 2048" \
-            -s "Maximum fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 2048" \
             -c "client hello, adding max_fragment_length extension" \
             -s "found max fragment length extension" \
             -s "server hello, max_fragment_length extension" \
@@ -3052,8 +3239,10 @@ run_test    "Max fragment length: DTLS client, larger message" \
             "$P_SRV debug_level=3 dtls=1" \
             "$P_CLI debug_level=3 dtls=1 max_frag_len=2048 request_size=2345" \
             1 \
-            -c "Maximum fragment length is 2048" \
+            -c "Maximum input fragment length is 2048" \
-            -s "Maximum fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 2048" \
             -c "client hello, adding max_fragment_length extension" \
             -s "found max fragment length extension" \
             -s "server hello, max_fragment_length extension" \
@@ -3154,6 +3343,29 @@ run_test    "Renegotiation: double" \
             -s "=> renegotiate" \
             -s "write hello request"
 
+requires_config_enabled MBEDTLS_SSL_RENEGOTIATION
+requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+run_test    "Renegotiation with max fragment length: client 2048, server 512" \
+            "$P_SRV debug_level=3 exchanges=2 renegotiation=1 auth_mode=optional renegotiate=1 max_frag_len=512" \
+            "$P_CLI debug_level=3 exchanges=2 renegotiation=1 renegotiate=1 max_frag_len=2048 force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-CCM-8" \
+            0 \
+            -c "Maximum input fragment length is 2048" \
+            -c "Maximum output fragment length is 2048" \
+            -s "Maximum input fragment length is 2048" \
+            -s "Maximum output fragment length is 512" \
+            -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 "client hello, adding renegotiation extension" \
+            -s "received TLS_EMPTY_RENEGOTIATION_INFO" \
+            -s "found renegotiation extension" \
+            -s "server hello, secure renegotiation extension" \
+            -c "found renegotiation extension" \
+            -c "=> renegotiate" \
+            -s "=> renegotiate" \
+            -s "write hello request"
+
 requires_config_enabled MBEDTLS_SSL_RENEGOTIATION
 run_test    "Renegotiation: client-initiated, server-rejected" \
             "$P_SRV debug_level=3 exchanges=2 renegotiation=0 auth_mode=optional" \

tests/suites/test_suite_ssl.data

@@ -379,40 +379,184 @@ DTLS serialization with MFL=4096
 resize_buffers_serialize_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096
 
 DTLS no legacy renegotiation with MFL=512
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:""
 
 DTLS no legacy renegotiation with MFL=1024
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:""
 
 DTLS no legacy renegotiation with MFL=2048
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:""
 
 DTLS no legacy renegotiation with MFL=4096
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:""
 
 DTLS legacy allow renegotiation with MFL=512
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:""
 
 DTLS legacy allow renegotiation with MFL=1024
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:""
 
 DTLS legacy allow renegotiation with MFL=2048
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:""
 
 DTLS legacy allow renegotiation with MFL=4096
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:""
 
 DTLS legacy break handshake renegotiation with MFL=512
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:""
 
 DTLS legacy break handshake renegotiation with MFL=1024
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:""
 
 DTLS legacy break handshake renegotiation with MFL=2048
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:""
 
 DTLS legacy break handshake renegotiation with MFL=4096
-resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:""
+
+DTLS no legacy renegotiation with MFL=512, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS no legacy renegotiation with MFL=1024, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS no legacy renegotiation with MFL=2048, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS no legacy renegotiation with MFL=4096, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy allow renegotiation with MFL=512, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy allow renegotiation with MFL=1024, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy allow renegotiation with MFL=2048, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy allow renegotiation with MFL=4096, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy break handshake renegotiation with MFL=512, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy break handshake renegotiation with MFL=1024, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy break handshake renegotiation with MFL=2048, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS legacy break handshake renegotiation with MFL=4096, ECDHE-RSA-WITH-AES-256-GCM-SHA384
+depends_on:MBEDTLS_SHA512_C:!MBEDTLS_SHA512_NO_SHA384:MBEDTLS_AES_C:MBEDTLS_GCM_C:MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384"
+
+DTLS no legacy renegotiation with MFL=512, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS no legacy renegotiation with MFL=1024, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS no legacy renegotiation with MFL=2048, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS no legacy renegotiation with MFL=4096, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy allow renegotiation with MFL=512, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy allow renegotiation with MFL=1024, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy allow renegotiation with MFL=2048, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy allow renegotiation with MFL=4096, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy break handshake renegotiation with MFL=512, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy break handshake renegotiation with MFL=1024, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy break handshake renegotiation with MFL=2048, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS legacy break handshake renegotiation with MFL=4096, RSA-WITH-AES-128-CCM
+depends_on:MBEDTLS_CCM_C:MBEDTLS_AES_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-RSA-WITH-AES-128-CCM"
+
+DTLS no legacy renegotiation with MFL=512, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS no legacy renegotiation with MFL=1024, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS no legacy renegotiation with MFL=2048, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS no legacy renegotiation with MFL=4096, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy allow renegotiation with MFL=512, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy allow renegotiation with MFL=1024, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy allow renegotiation with MFL=2048, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy allow renegotiation with MFL=4096, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_ALLOW_RENEGOTIATION:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy break handshake renegotiation with MFL=512, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_512:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy break handshake renegotiation with MFL=1024, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_1024:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy break handshake renegotiation with MFL=2048, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_2048:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
+
+DTLS legacy break handshake renegotiation with MFL=4096, DHE-RSA-WITH-AES-256-CBC-SHA256
+depends_on:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_AES_C:MBEDTLS_SHA256_C
+resize_buffers_renegotiate_mfl:MBEDTLS_SSL_MAX_FRAG_LEN_4096:MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE:"TLS-DHE-RSA-WITH-AES-256-CBC-SHA256"
 
 SSL DTLS replay: initial state, seqnum 0
 ssl_dtls_replay:"":"000000000000":0

tests/suites/test_suite_ssl.function

@@ -3900,12 +3900,13 @@ void renegotiation( int legacy_renegotiation )
 
 /* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_USE_PSA_CRYPTO:MBEDTLS_PKCS1_V15:MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH:MBEDTLS_SSL_PROTO_TLS1_2:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED */
 void resize_buffers( int mfl, int renegotiation, int legacy_renegotiation,
-                     int serialize, int dtls )
+                     int serialize, int dtls, char *cipher )
 {
     handshake_test_options options;
     init_handshake_options( &options );
 
     options.mfl = mfl;
+    options.cipher = cipher;
     options.renegotiate = renegotiation;
     options.legacy_renegotiation = legacy_renegotiation;
     options.serialize = serialize;
@@ -3921,7 +3922,8 @@ void resize_buffers( int mfl, int renegotiation, int legacy_renegotiation,
 /* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_USE_PSA_CRYPTO:MBEDTLS_PKCS1_V15:MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH:MBEDTLS_SSL_CONTEXT_SERIALIZATION:MBEDTLS_SSL_PROTO_TLS1_2:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED:MBEDTLS_SSL_PROTO_DTLS */
 void resize_buffers_serialize_mfl( int mfl )
 {
-    test_resize_buffers( mfl, 0, MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION, 1, 1 );
+    test_resize_buffers( mfl, 0, MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION, 1, 1,
+                         (char *) "" );
 
     /* The goto below is used to avoid an "unused label" warning.*/
     goto exit;
@@ -3929,9 +3931,10 @@ void resize_buffers_serialize_mfl( int mfl )
 /* END_CASE */
 
 /* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_USE_PSA_CRYPTO:MBEDTLS_PKCS1_V15:MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH:MBEDTLS_SSL_RENEGOTIATION:MBEDTLS_SSL_PROTO_TLS1_2:MBEDTLS_RSA_C:MBEDTLS_ECP_DP_SECP384R1_ENABLED */
-void resize_buffers_renegotiate_mfl( int mfl, int legacy_renegotiation )
+void resize_buffers_renegotiate_mfl( int mfl, int legacy_renegotiation,
+                                     char *cipher )
 {
-    test_resize_buffers( mfl, 1, legacy_renegotiation, 0, 1 );
+    test_resize_buffers( mfl, 1, legacy_renegotiation, 0, 1, cipher );
 
     /* The goto below is used to avoid an "unused label" warning.*/
     goto exit;