ssl_client2: Extract peer CRT info from verification callback

So far, `ssl_client2` printed the CRT info for the peer's CRT
by requesting the latter through `mbedtls_ssl_get_peer_cert()`
at the end of the handshake, and printing it via
`mbedtls_x509_crt_info()`. When `MBEDTLS_SSL_KEEP_PEER_CERTIFICATE`
is disabled, this does no longer work because the peer's CRT
isn't stored beyond the handshake.

This makes some tests in `ssl-opt.sh` fail which rely on the CRT
info output for the peer certificate.

This commit modifies `ssl_client2` to extract the peer CRT info
from the verification callback, which is always called at a time
when the peer's CRT is available. This way, the peer's CRT info
is still printed if `MBEDTLS_SSL_KEEP_PEER_CERTIFICATE` is disabled.
This commit is contained in:
Hanno Becker 2019-02-25 17:43:18 +00:00
parent 24bc570814
commit 975c463b3f

View File

@ -494,6 +494,8 @@ static int my_send( void *ctx, const unsigned char *buf, size_t len )
} }
#if defined(MBEDTLS_X509_CRT_PARSE_C) #if defined(MBEDTLS_X509_CRT_PARSE_C)
static unsigned char peer_crt_info[1024] = { 0 };
/* /*
* Enabled if debug_level > 1 in code below * Enabled if debug_level > 1 in code below
*/ */
@ -506,8 +508,14 @@ static int my_verify( void *data, mbedtls_x509_crt *crt,
((void) data); ((void) data);
#if !defined(MBEDTLS_X509_REMOVE_INFO) #if !defined(MBEDTLS_X509_REMOVE_INFO)
mbedtls_printf( "\nVerify requested for (Depth %d):\n", depth );
mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, "", crt ); mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, "", crt );
if( depth == 0 )
memcpy( peer_crt_info, buf, sizeof( buf ) );
if( opt.debug_level == 0 )
return( 0 );
mbedtls_printf( "\nVerify requested for (Depth %d):\n", depth );
mbedtls_printf( "%s", buf ); mbedtls_printf( "%s", buf );
#else #else
((void) crt); ((void) crt);
@ -1641,8 +1649,7 @@ int main( int argc, char *argv[] )
mbedtls_ssl_conf_sig_hashes( &conf, ssl_sig_hashes_for_test ); mbedtls_ssl_conf_sig_hashes( &conf, ssl_sig_hashes_for_test );
} }
if( opt.debug_level > 0 ) mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
#endif /* MBEDTLS_X509_CRT_PARSE_C */ #endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
@ -2021,13 +2028,8 @@ int main( int argc, char *argv[] )
mbedtls_printf( " ok\n" ); mbedtls_printf( " ok\n" );
#if !defined(MBEDTLS_X509_REMOVE_INFO) #if !defined(MBEDTLS_X509_REMOVE_INFO)
if( mbedtls_ssl_get_peer_cert( &ssl ) != NULL ) mbedtls_printf( " . Peer certificate information ...\n" );
{ mbedtls_printf( "%s\n", peer_crt_info );
mbedtls_printf( " . Peer certificate information ...\n" );
mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, " ",
mbedtls_ssl_get_peer_cert( &ssl ) );
mbedtls_printf( "%s\n", buf );
}
#endif /* !MBEDTLS_X509_REMOVE_INFO */ #endif /* !MBEDTLS_X509_REMOVE_INFO */
#endif /* MBEDTLS_X509_CRT_PARSE_C */ #endif /* MBEDTLS_X509_CRT_PARSE_C */