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Auxiliary functions to (de)serialize ssl_session

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Manuel Pégourié-Gonnard 2013-08-01 14:33:49 +02:00 committed by Paul Bakker
parent 7a358b8580
commit 94f6a79cde
1 changed files with 107 additions and 0 deletions
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107
library/ssl_srv.c
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@ -33,6 +33,13 @@
#include "polarssl/ecp.h"
#endif
#if defined(POLARSSL_MEMORY_C)
#include "polarssl/memory.h"
#else
#define polarssl_malloc malloc
#define polarssl_free free
#endif
#include <stdlib.h>
#include <stdio.h>
@ -40,6 +47,106 @@
#include <time.h>
#endif
/*
* Serialize a session in the following format:
* 0 . n-1 session structure, n = sizeof(ssl_session)
* n . n+2 peer_cert length = m (0 if no certificate)
* n+3 . n+2+m peer cert ASN.1
*
* Assumes ticket is NULL (always true on server side).
*/
static void ssl_save_session( const ssl_session *session,
unsigned char *buf, size_t *olen )
{
unsigned char *p = buf;
#if defined(POLARSSL_X509_PARSE_C)
size_t cert_len;
#endif /* POLARSSL_X509_PARSE_C */
memcpy( p, session, sizeof( ssl_session ) );
p += sizeof( ssl_session );
#if defined(POLARSSL_X509_PARSE_C)
((ssl_session *) buf)->peer_cert = NULL;
if( session->peer_cert == NULL )
cert_len = 0;
else
cert_len = session->peer_cert->raw.len;
*p++ = (unsigned char)( cert_len >> 16 & 0xFF );
*p++ = (unsigned char)( cert_len >> 8 & 0xFF );
*p++ = (unsigned char)( cert_len & 0xFF );
if( session->peer_cert != NULL )
memcpy( p, session->peer_cert->raw.p, cert_len );
p += cert_len;
#endif /* POLARSSL_X509_PARSE_C */
*olen = p - buf;
}
/*
* Unserialise session, see ssl_save_session()
*/
static int ssl_load_session( ssl_session *session,
const unsigned char *buf, size_t len )
{
int ret;
const unsigned char *p = buf;
const unsigned char * const end = buf + len;
#if defined(POLARSSL_X509_PARSE_C)
size_t cert_len;
#endif /* POLARSSL_X509_PARSE_C */
if( p + sizeof( ssl_session ) > end )
return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
memcpy( session, p, sizeof( ssl_session ) );
p += sizeof( ssl_session );
#if defined(POLARSSL_X509_PARSE_C)
if( p + 3 > end )
return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
cert_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2];
p += 3;
if( cert_len == 0 )
{
session->peer_cert = NULL;
}
else
{
if( p + cert_len > end )
return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
session->peer_cert = polarssl_malloc( cert_len );
if( session->peer_cert == NULL )
return( POLARSSL_ERR_SSL_MALLOC_FAILED );
memset( session->peer_cert, 0, sizeof( x509_cert ) );
if( ( ret = x509parse_crt( session->peer_cert, p, cert_len ) ) != 0 )
{
polarssl_free( session->peer_cert );
free( session->peer_cert );
session->peer_cert = NULL;
return( ret );
}
p += cert_len;
}
#endif /* POLARSSL_X509_PARSE_C */
if( p != end )
return( POLARSSL_ERR_SSL_BAD_INPUT_DATA );
return( 0 );
}
static int ssl_parse_servername_ext( ssl_context *ssl,
const unsigned char *buf,
size_t len )