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Remove useless guards and refine checking

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Change-Id: I9cd3073826fc65c203e479d83bed72331ff8963d
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
This commit is contained in:
XiaokangQian 2022-05-13 05:55:41 +00:00
parent 189ded2b07
commit c3017f620f
4 changed files with 43 additions and 51 deletions

5
library/ssl_misc.h

@ -510,8 +510,9 @@ struct mbedtls_ssl_handshake_params
#endif
#if defined(MBEDTLS_SSL_SRV_C)
/** cert_request_send to indicate whether client certitifacte request */
uint16_t cert_request_send;
/* Flag indicating if a CertificateRequest message has been sent
* to the client or not. */
uint16_t certificate_request_sent;
#endif /* MBEDTLS_SSL_SRV_C */
#if defined(MBEDTLS_SSL_SESSION_TICKETS)

67
library/ssl_tls13_generic.c

@ -315,14 +315,6 @@ int mbedtls_ssl_tls13_process_certificate_verify( mbedtls_ssl_context *ssl )
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate verify" ) );
if( ssl->handshake->cert_request_send &&
ssl->session_negotiate->peer_cert == NULL )
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate verify" ) );
ret = 0;
goto cleanup;
}
MBEDTLS_SSL_PROC_CHK(
mbedtls_ssl_tls13_fetch_handshake_msg( ssl,
MBEDTLS_SSL_HS_CERTIFICATE_VERIFY, &buf, &buf_len ) );
@ -472,6 +464,13 @@ static int ssl_tls13_parse_certificate( mbedtls_ssl_context *ssl,
mbedtls_free( ssl->session_negotiate->peer_cert );
}
if( certificate_list_len == 0 )
{
ssl->session_negotiate->peer_cert = NULL;
ret = 0;
goto exit;
}
if( ( ssl->session_negotiate->peer_cert =
mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) ) ) == NULL )
{
@ -557,6 +556,7 @@ static int ssl_tls13_parse_certificate( mbedtls_ssl_context *ssl,
return( MBEDTLS_ERR_SSL_DECODE_ERROR );
}
exit:
MBEDTLS_SSL_DEBUG_CRT( 3, "peer certificate", ssl->session_negotiate->peer_cert );
return( ret );
@ -620,15 +620,15 @@ static int ssl_tls13_validate_certificate( mbedtls_ssl_context *ssl )
}
#endif /* MBEDTLS_SSL_SRV_C */
if( authmode == MBEDTLS_SSL_VERIFY_NONE )
#if defined(MBEDTLS_SSL_CLI_C)
if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
ssl->session_negotiate->peer_cert == NULL )
{
/* NOTE: This happens on client-side only, with the
* server-side case of VERIFY_NONE being handled earlier
* and leading to `ssl->verify_result` being set to
* MBEDTLS_X509_BADCERT_SKIP_VERIFY --
* is this difference intentional? */
return( 0 );
MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_NO_CERT,
MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE );
return( MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE );
}
#endif /* MBEDTLS_SSL_CLI_C */
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
if( ssl->handshake->sni_ca_chain != NULL )
@ -746,36 +746,23 @@ int mbedtls_ssl_tls13_process_certificate( mbedtls_ssl_context *ssl )
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
/* Coordination:
* Check if we expect a certificate, and if yes,
* check if a non-empty certificate has been sent.
*/
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
if( ssl->handshake->cert_request_send )
{
unsigned char *buf;
size_t buf_len;
unsigned char *buf;
size_t buf_len;
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_fetch_handshake_msg(
ssl, MBEDTLS_SSL_HS_CERTIFICATE,
&buf, &buf_len ) );
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_fetch_handshake_msg(
ssl, MBEDTLS_SSL_HS_CERTIFICATE,
&buf, &buf_len ) );
/* Parse the certificate chain sent by the peer. */
MBEDTLS_SSL_PROC_CHK( ssl_tls13_parse_certificate( ssl, buf,
buf + buf_len ) );
/* Validate the certificate chain and set the verification results. */
MBEDTLS_SSL_PROC_CHK( ssl_tls13_validate_certificate( ssl ) );
/* Parse the certificate chain sent by the peer. */
MBEDTLS_SSL_PROC_CHK( ssl_tls13_parse_certificate( ssl, buf,
buf + buf_len ) );
/* Validate the certificate chain and set the verification results. */
MBEDTLS_SSL_PROC_CHK( ssl_tls13_validate_certificate( ssl ) );
mbedtls_ssl_add_hs_msg_to_checksum( ssl, MBEDTLS_SSL_HS_CERTIFICATE,
buf, buf_len );
}
else
mbedtls_ssl_add_hs_msg_to_checksum( ssl, MBEDTLS_SSL_HS_CERTIFICATE,
buf, buf_len );
#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
ret = 0;
}
cleanup:

16
library/ssl_tls13_server.c

@ -1342,7 +1342,7 @@ static int ssl_tls13_certificate_request_coordinate( mbedtls_ssl_context *ssl )
if( authmode == MBEDTLS_SSL_VERIFY_NONE )
return( SSL_CERTIFICATE_REQUEST_SKIP );
ssl->handshake->cert_request_send = 1;
ssl->handshake->certificate_request_sent = 1;
return( SSL_CERTIFICATE_REQUEST_SEND_REQUEST );
}
@ -1497,7 +1497,8 @@ static int ssl_tls13_write_server_finished( mbedtls_ssl_context *ssl )
MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
return( ret );
}
if( ssl->handshake->cert_request_send )
if( ssl->handshake->certificate_request_sent )
{
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE );
@ -1517,9 +1518,9 @@ static int ssl_tls13_process_client_finished( mbedtls_ssl_context *ssl )
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
MBEDTLS_SSL_DEBUG_MSG( 1,
( "Switch to handshake traffic keys for inbound traffic" ) );
mbedtls_ssl_set_inbound_transform( ssl, ssl->handshake->transform_handshake );
( "Switch to handshake traffic keys for outbound traffic" ) );
if( ! ssl->handshake->certificate_request_sent )
mbedtls_ssl_set_inbound_transform( ssl, ssl->handshake->transform_handshake );
ret = mbedtls_ssl_tls13_process_finished_message( ssl );
if( ret != 0 )
return( ret );
@ -1625,11 +1626,14 @@ int mbedtls_ssl_tls13_handshake_server_step( mbedtls_ssl_context *ssl )
case MBEDTLS_SSL_CLIENT_CERTIFICATE:
ret = mbedtls_ssl_tls13_process_certificate( ssl );
if( ret == 0 )
if( ret == 0 && ssl->session_negotiate->peer_cert != NULL)
{
mbedtls_ssl_handshake_set_state(
ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY );
}
else
mbedtls_ssl_handshake_set_state(
ssl, MBEDTLS_SSL_CLIENT_FINISHED );
break;
case MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY:

6
tests/ssl-opt.sh

@ -11291,7 +11291,7 @@ requires_config_enabled MBEDTLS_SSL_SRV_C
run_test "TLS 1.3: Server side check - gnutls with client authentication" \
"$P_SRV debug_level=4 auth_mode=required crt_file=data_files/server5.crt key_file=data_files/server5.key force_version=tls13 tickets=0" \
"$G_NEXT_CLI localhost -d 4 --x509certfile data_files/server5.crt --x509keyfile data_files/server5.key --priority=NORMAL:-VERS-ALL:+VERS-TLS1.3:%NO_TICKETS:%DISABLE_TLS13_COMPAT_MODE -V" \
1 \
0 \
-s "tls13 server state: MBEDTLS_SSL_CLIENT_HELLO" \
-s "tls13 server state: MBEDTLS_SSL_SERVER_HELLO" \
-s "tls13 server state: MBEDTLS_SSL_ENCRYPTED_EXTENSIONS" \
@ -11310,7 +11310,7 @@ requires_config_enabled MBEDTLS_SSL_CLI_C
run_test "TLS 1.3: Server side check - mbedtls" \
"$P_SRV debug_level=4 crt_file=data_files/server5.crt key_file=data_files/server5.key force_version=tls13 tickets=0" \
"$P_CLI debug_level=4 force_version=tls13" \
1 \
0 \
-s "tls13 server state: MBEDTLS_SSL_CLIENT_HELLO" \
-s "tls13 server state: MBEDTLS_SSL_SERVER_HELLO" \
-s "tls13 server state: MBEDTLS_SSL_ENCRYPTED_EXTENSIONS" \
@ -11329,7 +11329,7 @@ requires_config_enabled MBEDTLS_SSL_CLI_C
run_test "TLS 1.3: Server side check - mbedtls with client authentication" \
"$P_SRV debug_level=4 auth_mode=required crt_file=data_files/server5.crt key_file=data_files/server5.key force_version=tls13 tickets=0" \
"$P_CLI debug_level=4 crt_file=data_files/server5.crt key_file=data_files/server5.key force_version=tls13" \
1 \
0 \
-s "tls13 server state: MBEDTLS_SSL_CLIENT_HELLO" \
-s "tls13 server state: MBEDTLS_SSL_SERVER_HELLO" \
-s "tls13 server state: MBEDTLS_SSL_ENCRYPTED_EXTENSIONS" \