mirror of
https://github.com/Mbed-TLS/mbedtls.git
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Merge pull request #5640 from ronald-cron-arm/version-negotiation-2
TLS 1.2/1.3 version negotiation - 2
This commit is contained in:
Ronald Cron
GitHub
@@ -38,6 +38,8 @@
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#endif /* !MBEDTLS_PLATFORM_C */
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#include "mbedtls/ssl.h"
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#include "ssl_client.h"
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#include "ssl_debug_helpers.h"
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#include "ssl_misc.h"
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#include "mbedtls/debug.h"
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#include "mbedtls/error.h"
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@@ -908,13 +910,6 @@ static int ssl_conf_version_check( const mbedtls_ssl_context *ssl )
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const mbedtls_ssl_config *conf = ssl->conf;
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#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
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if( mbedtls_ssl_conf_is_tls13_enabled( conf ) &&
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( conf->endpoint == MBEDTLS_SSL_IS_SERVER ) )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS 1.3 server is not supported yet." ) );
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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if( mbedtls_ssl_conf_is_tls13_only( conf ) )
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{
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if( conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
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@@ -922,6 +917,13 @@ static int ssl_conf_version_check( const mbedtls_ssl_context *ssl )
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS 1.3 is not yet supported." ) );
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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if( conf->endpoint == MBEDTLS_SSL_IS_SERVER )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS 1.3 server is not supported yet." ) );
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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MBEDTLS_SSL_DEBUG_MSG( 4, ( "The SSL configuration is tls13 only." ) );
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return( 0 );
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}
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@@ -938,8 +940,20 @@ static int ssl_conf_version_check( const mbedtls_ssl_context *ssl )
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && defined(MBEDTLS_SSL_PROTO_TLS1_3)
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if( mbedtls_ssl_conf_is_hybrid_tls12_tls13( conf ) )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "Hybrid TLS 1.2 + TLS 1.3 configurations are not yet supported" ) );
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS not yet supported in Hybrid TLS 1.3 + TLS 1.2" ) );
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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if( conf->endpoint == MBEDTLS_SSL_IS_SERVER )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS 1.3 server is not supported yet." ) );
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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MBEDTLS_SSL_DEBUG_MSG( 4, ( "The SSL configuration is TLS 1.3 or TLS 1.2." ) );
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return( 0 );
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}
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#endif
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@@ -2847,15 +2861,31 @@ int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl )
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#if defined(MBEDTLS_SSL_CLI_C)
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if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
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{
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#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
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if( mbedtls_ssl_conf_is_tls13_only( ssl->conf ) )
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ret = mbedtls_ssl_tls13_handshake_client_step( ssl );
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#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
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MBEDTLS_SSL_DEBUG_MSG( 2, ( "client state: %s",
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mbedtls_ssl_states_str( ssl->state ) ) );
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
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if( mbedtls_ssl_conf_is_tls12_only( ssl->conf ) )
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ret = mbedtls_ssl_handshake_client_step( ssl );
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#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
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switch( ssl->state )
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{
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case MBEDTLS_SSL_HELLO_REQUEST:
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ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
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break;
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case MBEDTLS_SSL_CLIENT_HELLO:
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ret = mbedtls_ssl_write_client_hello( ssl );
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break;
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default:
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && defined(MBEDTLS_SSL_PROTO_TLS1_3)
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if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_4 )
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ret = mbedtls_ssl_tls13_handshake_client_step( ssl );
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else
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ret = mbedtls_ssl_handshake_client_step( ssl );
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#elif defined(MBEDTLS_SSL_PROTO_TLS1_2)
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ret = mbedtls_ssl_handshake_client_step( ssl );
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#else
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ret = mbedtls_ssl_tls13_handshake_client_step( ssl );
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#endif
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}
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}
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#endif
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#if defined(MBEDTLS_SSL_SRV_C)
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@@ -4228,16 +4258,30 @@ int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
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* NSA Suite B
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*/
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case MBEDTLS_SSL_PRESET_SUITEB:
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conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
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conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; /* TLS 1.2 */
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conf->min_major_ver = MBEDTLS_SSL_MIN_MAJOR_VERSION;
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conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && defined(MBEDTLS_SSL_PROTO_TLS1_3)
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/* Hybrid TLS 1.2/1.3 is not supported yet */
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conf->max_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
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#else
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conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
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#endif /* MBEDTLS_SSL_PROTO_TLS1_2 && MBEDTLS_SSL_PROTO_TLS1_3 */
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if( ( endpoint == MBEDTLS_SSL_IS_SERVER ) ||
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( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) )
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
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{
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conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
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conf->max_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
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}
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#else
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{
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conf->min_major_ver = 0;
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conf->max_major_ver = 0;
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conf->min_minor_ver = 0;
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conf->max_minor_ver = 0;
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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#endif
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else
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{
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conf->min_minor_ver = MBEDTLS_SSL_MIN_MINOR_VERSION;
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conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
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}
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conf->ciphersuite_list = ssl_preset_suiteb_ciphersuites;
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#if defined(MBEDTLS_X509_CRT_PARSE_C)
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@@ -4266,26 +4310,31 @@ int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
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* Default
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*/
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default:
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conf->min_major_ver = ( MBEDTLS_SSL_MIN_MAJOR_VERSION >
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MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION ) ?
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MBEDTLS_SSL_MIN_MAJOR_VERSION :
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MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION;
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conf->min_minor_ver = ( MBEDTLS_SSL_MIN_MINOR_VERSION >
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MBEDTLS_SSL_MIN_VALID_MINOR_VERSION ) ?
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MBEDTLS_SSL_MIN_MINOR_VERSION :
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MBEDTLS_SSL_MIN_VALID_MINOR_VERSION;
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conf->min_major_ver = MBEDTLS_SSL_MIN_MAJOR_VERSION;
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conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && defined(MBEDTLS_SSL_PROTO_TLS1_3)
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/* Hybrid TLS 1.2/1.3 is not supported yet */
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conf->max_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
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#else
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conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
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#endif /* MBEDTLS_SSL_PROTO_TLS1_2 && MBEDTLS_SSL_PROTO_TLS1_3 */
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#if defined(MBEDTLS_SSL_PROTO_DTLS)
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if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
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if( ( endpoint == MBEDTLS_SSL_IS_SERVER ) ||
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( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) )
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#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
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{
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conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
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conf->max_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
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}
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#else
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{
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conf->min_major_ver = 0;
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conf->max_major_ver = 0;
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conf->min_minor_ver = 0;
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conf->max_minor_ver = 0;
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return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
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}
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#endif
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else
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{
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conf->min_minor_ver = MBEDTLS_SSL_MIN_MINOR_VERSION;
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conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
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}
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conf->ciphersuite_list = mbedtls_ssl_list_ciphersuites();
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#if defined(MBEDTLS_X509_CRT_PARSE_C)
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@@ -4709,305 +4758,6 @@ int mbedtls_ssl_get_handshake_transcript( mbedtls_ssl_context *ssl,
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#endif /* !MBEDTLS_USE_PSA_CRYPTO */
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#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) || \
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defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
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defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
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/*
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* Function for writing a supported groups (TLS 1.3) or supported elliptic
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* curves (TLS 1.2) extension.
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*
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* The "extension_data" field of a supported groups extension contains a
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* "NamedGroupList" value (TLS 1.3 RFC8446):
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* enum {
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* secp256r1(0x0017), secp384r1(0x0018), secp521r1(0x0019),
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* x25519(0x001D), x448(0x001E),
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* ffdhe2048(0x0100), ffdhe3072(0x0101), ffdhe4096(0x0102),
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* ffdhe6144(0x0103), ffdhe8192(0x0104),
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* ffdhe_private_use(0x01FC..0x01FF),
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* ecdhe_private_use(0xFE00..0xFEFF),
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* (0xFFFF)
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* } NamedGroup;
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* struct {
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* NamedGroup named_group_list<2..2^16-1>;
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* } NamedGroupList;
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*
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* The "extension_data" field of a supported elliptic curves extension contains
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* a "NamedCurveList" value (TLS 1.2 RFC 8422):
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* enum {
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* deprecated(1..22),
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* secp256r1 (23), secp384r1 (24), secp521r1 (25),
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* x25519(29), x448(30),
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* reserved (0xFE00..0xFEFF),
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* deprecated(0xFF01..0xFF02),
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* (0xFFFF)
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* } NamedCurve;
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* struct {
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* NamedCurve named_curve_list<2..2^16-1>
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* } NamedCurveList;
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*
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* The TLS 1.3 supported groups extension was defined to be a compatible
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* generalization of the TLS 1.2 supported elliptic curves extension. They both
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* share the same extension identifier.
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*
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* DHE groups are not supported yet.
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*/
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int mbedtls_ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
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unsigned char *buf,
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const unsigned char *end,
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size_t *out_len )
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{
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unsigned char *p = buf ;
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unsigned char *named_group_list; /* Start of named_group_list */
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size_t named_group_list_len; /* Length of named_group_list */
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const uint16_t *group_list = mbedtls_ssl_get_groups( ssl );
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*out_len = 0;
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MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_groups extension" ) );
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/* Check if we have space for header and length fields:
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* - extension_type (2 bytes)
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* - extension_data_length (2 bytes)
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* - named_group_list_length (2 bytes)
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*/
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
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p += 6;
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named_group_list = p;
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if( group_list == NULL )
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return( MBEDTLS_ERR_SSL_BAD_CONFIG );
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for( ; *group_list != 0; group_list++ )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "got supported group(%04x)", *group_list ) );
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#if defined(MBEDTLS_ECP_C)
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if( ( mbedtls_ssl_conf_is_tls13_enabled( ssl->conf ) &&
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mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) ) ||
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( mbedtls_ssl_conf_is_tls12_enabled( ssl->conf ) &&
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mbedtls_ssl_tls12_named_group_is_ecdhe( *group_list ) ) )
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{
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const mbedtls_ecp_curve_info *curve_info;
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curve_info = mbedtls_ecp_curve_info_from_tls_id( *group_list );
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if( curve_info == NULL )
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continue;
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
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MBEDTLS_PUT_UINT16_BE( *group_list, p, 0 );
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p += 2;
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MBEDTLS_SSL_DEBUG_MSG( 3, ( "NamedGroup: %s ( %x )",
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curve_info->name, *group_list ) );
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}
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#endif /* MBEDTLS_ECP_C */
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/* Add DHE groups here */
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}
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/* Length of named_group_list */
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named_group_list_len = p - named_group_list;
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if( named_group_list_len == 0 )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "No group available." ) );
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return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
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}
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/* Write extension_type */
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MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_GROUPS, buf, 0 );
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/* Write extension_data_length */
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MBEDTLS_PUT_UINT16_BE( named_group_list_len + 2, buf, 2 );
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/* Write length of named_group_list */
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MBEDTLS_PUT_UINT16_BE( named_group_list_len, buf, 4 );
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MBEDTLS_SSL_DEBUG_BUF( 3, "Supported groups extension",
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buf + 4, named_group_list_len + 2 );
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*out_len = p - buf;
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#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
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ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SUPPORTED_GROUPS;
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#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
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return( 0 );
|
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}
|
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|
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#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED ||
|
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MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
|
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MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
|
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#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
|
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/*
|
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* Function for writing a signature algorithm extension.
|
||||
*
|
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* The `extension_data` field of signature algorithm contains a `SignatureSchemeList`
|
||||
* value (TLS 1.3 RFC8446):
|
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* enum {
|
||||
* ....
|
||||
* ecdsa_secp256r1_sha256( 0x0403 ),
|
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* ecdsa_secp384r1_sha384( 0x0503 ),
|
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* ecdsa_secp521r1_sha512( 0x0603 ),
|
||||
* ....
|
||||
* } SignatureScheme;
|
||||
*
|
||||
* struct {
|
||||
* SignatureScheme supported_signature_algorithms<2..2^16-2>;
|
||||
* } SignatureSchemeList;
|
||||
*
|
||||
* The `extension_data` field of signature algorithm contains a `SignatureAndHashAlgorithm`
|
||||
* value (TLS 1.2 RFC5246):
|
||||
* enum {
|
||||
* none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
|
||||
* sha512(6), (255)
|
||||
* } HashAlgorithm;
|
||||
*
|
||||
* enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
|
||||
* SignatureAlgorithm;
|
||||
*
|
||||
* struct {
|
||||
* HashAlgorithm hash;
|
||||
* SignatureAlgorithm signature;
|
||||
* } SignatureAndHashAlgorithm;
|
||||
*
|
||||
* SignatureAndHashAlgorithm
|
||||
* supported_signature_algorithms<2..2^16-2>;
|
||||
*
|
||||
* The TLS 1.3 signature algorithm extension was defined to be a compatible
|
||||
* generalization of the TLS 1.2 signature algorithm extension.
|
||||
* `SignatureAndHashAlgorithm` field of TLS 1.2 can be represented by
|
||||
* `SignatureScheme` field of TLS 1.3
|
||||
*
|
||||
*/
|
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int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
|
||||
const unsigned char *end, size_t *out_len )
|
||||
{
|
||||
unsigned char *p = buf;
|
||||
unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
|
||||
size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
|
||||
|
||||
*out_len = 0;
|
||||
|
||||
MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
|
||||
|
||||
/* Check if we have space for header and length field:
|
||||
* - extension_type (2 bytes)
|
||||
* - extension_data_length (2 bytes)
|
||||
* - supported_signature_algorithms_length (2 bytes)
|
||||
*/
|
||||
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
|
||||
p += 6;
|
||||
|
||||
/*
|
||||
* Write supported_signature_algorithms
|
||||
*/
|
||||
supported_sig_alg = p;
|
||||
const uint16_t *sig_alg = mbedtls_ssl_get_sig_algs( ssl );
|
||||
if( sig_alg == NULL )
|
||||
return( MBEDTLS_ERR_SSL_BAD_CONFIG );
|
||||
|
||||
for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
|
||||
{
|
||||
if( ! mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg ) )
|
||||
continue;
|
||||
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
|
||||
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
|
||||
p += 2;
|
||||
MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
|
||||
}
|
||||
|
||||
/* Length of supported_signature_algorithms */
|
||||
supported_sig_alg_len = p - supported_sig_alg;
|
||||
if( supported_sig_alg_len == 0 )
|
||||
{
|
||||
MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
|
||||
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
|
||||
}
|
||||
|
||||
/* Write extension_type */
|
||||
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
|
||||
/* Write extension_data_length */
|
||||
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
|
||||
/* Write length of supported_signature_algorithms */
|
||||
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
|
||||
|
||||
/* Output the total length of signature algorithms extension. */
|
||||
*out_len = p - buf;
|
||||
|
||||
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
|
||||
ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SIG_ALG;
|
||||
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
|
||||
return( 0 );
|
||||
}
|
||||
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
|
||||
|
||||
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
|
||||
int mbedtls_ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
|
||||
unsigned char *buf,
|
||||
const unsigned char *end,
|
||||
size_t *olen )
|
||||
{
|
||||
unsigned char *p = buf;
|
||||
size_t hostname_len;
|
||||
|
||||
*olen = 0;
|
||||
|
||||
if( ssl->hostname == NULL )
|
||||
return( 0 );
|
||||
|
||||
MBEDTLS_SSL_DEBUG_MSG( 3,
|
||||
( "client hello, adding server name extension: %s",
|
||||
ssl->hostname ) );
|
||||
|
||||
hostname_len = strlen( ssl->hostname );
|
||||
|
||||
MBEDTLS_SSL_CHK_BUF_PTR( p, end, hostname_len + 9 );
|
||||
|
||||
/*
|
||||
* Sect. 3, RFC 6066 (TLS Extensions Definitions)
|
||||
*
|
||||
* In order to provide any of the server names, clients MAY include an
|
||||
* extension of type "server_name" in the (extended) client hello. The
|
||||
* "extension_data" field of this extension SHALL contain
|
||||
* "ServerNameList" where:
|
||||
*
|
||||
* struct {
|
||||
* NameType name_type;
|
||||
* select (name_type) {
|
||||
* case host_name: HostName;
|
||||
* } name;
|
||||
* } ServerName;
|
||||
*
|
||||
* enum {
|
||||
* host_name(0), (255)
|
||||
* } NameType;
|
||||
*
|
||||
* opaque HostName<1..2^16-1>;
|
||||
*
|
||||
* struct {
|
||||
* ServerName server_name_list<1..2^16-1>
|
||||
* } ServerNameList;
|
||||
*
|
||||
*/
|
||||
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SERVERNAME, p, 0 );
|
||||
p += 2;
|
||||
|
||||
MBEDTLS_PUT_UINT16_BE( hostname_len + 5, p, 0 );
|
||||
p += 2;
|
||||
|
||||
MBEDTLS_PUT_UINT16_BE( hostname_len + 3, p, 0 );
|
||||
p += 2;
|
||||
|
||||
*p++ = MBEDTLS_BYTE_0( MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME );
|
||||
|
||||
MBEDTLS_PUT_UINT16_BE( hostname_len, p, 0 );
|
||||
p += 2;
|
||||
|
||||
memcpy( p, ssl->hostname, hostname_len );
|
||||
|
||||
*olen = hostname_len + 9;
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
|
||||
|
||||
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
|
||||
|
||||
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
||||
|
||||
Reference in New Issue
Block a user