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Simplify session cache implementation via mbedtls_ssl_session_copy()

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This commit is contained in:
Hanno Becker 2019-02-06 14:53:19 +00:00
parent 58fccf2f62
commit a177b38618
1 changed files with 34 additions and 12 deletions
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46
library/ssl_cache.c
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@ -40,6 +40,7 @@
#endif
#include "mbedtls/ssl_cache.h"
#include "mbedtls/ssl_internal.h"
#include <string.h>
@ -92,9 +93,12 @@ int mbedtls_ssl_cache_get( void *data, mbedtls_ssl_session *session )
entry->session.id_len ) != 0 )
continue;
memcpy( session->master, entry->session.master, 48 );
session->verify_result = entry->session.verify_result;
ret = mbedtls_ssl_session_copy( session, &entry->session );
if( ret != 0 )
{
ret = 1;
goto exit;
}
#if defined(MBEDTLS_X509_CRT_PARSE_C)
/*
@ -102,6 +106,10 @@ int mbedtls_ssl_cache_get( void *data, mbedtls_ssl_session *session )
*/
if( entry->peer_cert.p != NULL )
{
/* `session->peer_cert` is NULL after the call to
* mbedtls_ssl_session_copy(), because cache entries
* have the `peer_cert` field set to NULL. */
if( ( session->peer_cert = mbedtls_calloc( 1,
sizeof(mbedtls_x509_crt) ) ) == NULL )
{
@ -239,8 +247,6 @@ int mbedtls_ssl_cache_set( void *data, const mbedtls_ssl_session *session )
#endif
}
memcpy( &cur->session, session, sizeof( mbedtls_ssl_session ) );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
/*
* If we're reusing an entry, free its certificate first
@ -250,23 +256,39 @@ int mbedtls_ssl_cache_set( void *data, const mbedtls_ssl_session *session )
mbedtls_free( cur->peer_cert.p );
memset( &cur->peer_cert, 0, sizeof(mbedtls_x509_buf) );
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */
/*
* Store peer certificate
*/
if( session->peer_cert != NULL )
/* Copy the entire session; this temporarily makes a copy of the
* X.509 CRT structure even though we only want to store the raw CRT.
* This inefficiency will go away as soon as we implement on-demand
* parsing of CRTs, in which case there's no need for the `peer_cert`
* field anymore in the first place, and we're done after this call. */
ret = mbedtls_ssl_session_copy( &cur->session, session );
if( ret != 0 )
{
cur->peer_cert.p = mbedtls_calloc( 1, session->peer_cert->raw.len );
ret = 1;
goto exit;
}
#if defined(MBEDTLS_X509_CRT_PARSE_C)
/* If present, free the X.509 structure and only store the raw CRT data. */
if( cur->session.peer_cert != NULL )
{
cur->peer_cert.p =
mbedtls_calloc( 1, cur->session.peer_cert->raw.len );
if( cur->peer_cert.p == NULL )
{
ret = 1;
goto exit;
}
memcpy( cur->peer_cert.p, session->peer_cert->raw.p,
session->peer_cert->raw.len );
memcpy( cur->peer_cert.p,
cur->session.peer_cert->raw.p,
cur->session.peer_cert->raw.len );
cur->peer_cert.len = session->peer_cert->raw.len;
mbedtls_x509_crt_free( cur->session.peer_cert );
mbedtls_free( cur->session.peer_cert );
cur->session.peer_cert = NULL;
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */