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Avoid duplication of session format header

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Manuel Pégourié-Gonnard 2019-07-23 16:52:45 +02:00 committed by Jarno Lamsa
parent 4e9370ba91
commit 45ac1f0c92
1 changed files with 53 additions and 31 deletions
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84
library/ssl_tls.c
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@ -9961,10 +9961,11 @@ static unsigned char ssl_serialized_session_header[] = {
* verify_result is put before peer_cert so that all mandatory fields come
* together in one block.
*/
int mbedtls_ssl_session_save( const mbedtls_ssl_session *session,
unsigned char *buf,
size_t buf_len,
size_t *olen )
static int ssl_session_save( const mbedtls_ssl_session *session,
unsigned char omit_header,
unsigned char *buf,
size_t buf_len,
size_t *olen )
{
unsigned char *p = buf;
size_t used = 0;
@ -9978,17 +9979,20 @@ int mbedtls_ssl_session_save( const mbedtls_ssl_session *session,
#endif /* MBEDTLS_X509_CRT_PARSE_C */
/*
* Add version identifier
*/
used += sizeof( ssl_serialized_session_header );
if( used <= buf_len )
if( !omit_header )
{
memcpy( p, ssl_serialized_session_header,
sizeof( ssl_serialized_session_header ) );
p += sizeof( ssl_serialized_session_header );
/*
* Add version identifier
*/
used += sizeof( ssl_serialized_session_header );
if( used <= buf_len )
{
memcpy( p, ssl_serialized_session_header,
sizeof( ssl_serialized_session_header ) );
p += sizeof( ssl_serialized_session_header );
}
}
/*
@ -10149,13 +10153,25 @@ int mbedtls_ssl_session_save( const mbedtls_ssl_session *session,
return( 0 );
}
/*
* Public wrapper for ssl_session_save()
*/
int mbedtls_ssl_session_save( const mbedtls_ssl_session *session,
unsigned char *buf,
size_t buf_len,
size_t *olen )
{
return( ssl_session_save( session, 0, buf, buf_len, olen ) );
}
/*
* Deserialize session, see mbedtls_ssl_session_save() for format.
*
* This internal version is wrapped by a public function that cleans up in
* case of error.
* case of error, and has an extra option omit_header.
*/
static int ssl_session_load( mbedtls_ssl_session *session,
unsigned char omit_header,
const unsigned char *buf,
size_t len )
{
@ -10170,19 +10186,22 @@ static int ssl_session_load( mbedtls_ssl_session *session,
#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
/*
* Check version identifier
*/
if( (size_t)( end - p ) < sizeof( ssl_serialized_session_header ) )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
if( memcmp( p, ssl_serialized_session_header,
sizeof( ssl_serialized_session_header ) ) != 0 )
if( !omit_header )
{
return( MBEDTLS_ERR_SSL_VERSION_MISMATCH );
/*
* Check version identifier
*/
if( (size_t)( end - p ) < sizeof( ssl_serialized_session_header ) )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
if( memcmp( p, ssl_serialized_session_header,
sizeof( ssl_serialized_session_header ) ) != 0 )
{
return( MBEDTLS_ERR_SSL_VERSION_MISMATCH );
}
p += sizeof( ssl_serialized_session_header );
}
p += sizeof( ssl_serialized_session_header );
/*
* Time
@ -10381,7 +10400,7 @@ int mbedtls_ssl_session_load( mbedtls_ssl_session *session,
const unsigned char *buf,
size_t len )
{
int ret = ssl_session_load( session, buf, len );
int ret = ssl_session_load( session, 0, buf, len );
if( ret != 0 )
mbedtls_ssl_session_free( session );
@ -11424,7 +11443,7 @@ int mbedtls_ssl_context_save( mbedtls_ssl_context *ssl,
/*
* Session (length + data)
*/
ret = mbedtls_ssl_session_save( ssl->session, NULL, 0, &session_len );
ret = ssl_session_save( ssl->session, 1, NULL, 0, &session_len );
if( ret != MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL )
return( ret );
@ -11436,8 +11455,8 @@ int mbedtls_ssl_context_save( mbedtls_ssl_context *ssl,
*p++ = (unsigned char)( ( session_len >> 8 ) & 0xFF );
*p++ = (unsigned char)( ( session_len ) & 0xFF );
ret = mbedtls_ssl_session_save( ssl->session,
p, session_len, &session_len );
ret = ssl_session_save( ssl->session, 1,
p, session_len, &session_len );
if( ret != 0 )
return( ret );
@ -11661,9 +11680,12 @@ static int ssl_context_load( mbedtls_ssl_context *ssl,
if( (size_t)( end - p ) < session_len )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
ret = mbedtls_ssl_session_load( ssl->session, p, session_len );
ret = ssl_session_load( ssl->session, 1, p, session_len );
if( ret != 0 )
{
mbedtls_ssl_session_free( ssl->session );
return( ret );
}
p += session_len;