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Add I/O buffer resizing in handshake init and free

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Add a conditional buffer resizing feature. Introduce tests exercising
it in various setups (serialization, renegotiation, mfl manipulations).
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek
2020-03-03 10:39:58 -05:00
parent aad82f9bbb
commit 0afa2a1b65
4 changed files with 309 additions and 0 deletions
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26
include/mbedtls/ssl_internal.h
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@ -256,6 +256,32 @@
+ ( MBEDTLS_SSL_CID_OUT_LEN_MAX ) )
#endif
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
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 )
+ 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 )
+ MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
#endif
}
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 )
+ 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 )
+ MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
#endif
}
#endif
#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 ( \