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Skip CertificateVerfiy if empty certificate or no
CertificateRequest received.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
This commit is contained in:
Jerry Yu 2022-02-15 14:22:05 +08:00
parent 537530d57a
commit ca133a34c5
3 changed files with 39 additions and 57 deletions
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8
library/ssl_tls13_client.c
View file

@ -1917,11 +1917,11 @@ static int ssl_tls13_process_server_finished( mbedtls_ssl_context *ssl )
MBEDTLS_SSL_CLIENT_CCS_AFTER_SERVER_FINISHED );
#else
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
if( ssl->handshake->client_auth )
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE );
else
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE );
#else
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED );
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED );
#endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */
return( 0 );

78
library/ssl_tls13_generic.c
View file

@ -997,7 +997,14 @@ static int ssl_tls13_finalize_write_certificate( mbedtls_ssl_context *ssl )
#if defined(MBEDTLS_SSL_CLI_C)
if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
{
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY );
const mbedtls_x509_crt *crt = mbedtls_ssl_own_cert( ssl );
if( ssl->handshake->client_auth && crt != NULL )
{
mbedtls_ssl_handshake_set_state( ssl,
MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY );
}
else
mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED );
return( 0 );
}
else
@ -1051,14 +1058,6 @@ cleanup:
/*
* STATE HANDLING: Output Certificate Verify
*/
/* Coordinate: Check whether a Certificate Verify message should be sent.
* Returns a negative value on failure, and otherwise
* - SSL_WRITE_CERTIFICATE_VERIFY_SKIP
* - SSL_WRITE_CERTIFICATE_VERIFY_SEND
* to indicate if the CertificateVerify message should be sent or not.
*/
#define SSL_WRITE_CERTIFICATE_VERIFY_SKIP 0
#define SSL_WRITE_CERTIFICATE_VERIFY_SEND 1
static int ssl_tls13_write_certificate_verify_coordinate(
mbedtls_ssl_context *ssl )
{
@ -1066,8 +1065,8 @@ static int ssl_tls13_write_certificate_verify_coordinate(
if( mbedtls_ssl_tls13_some_psk_enabled( ssl ) )
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
return( SSL_WRITE_CERTIFICATE_VERIFY_SKIP );
MBEDTLS_SSL_DEBUG_MSG( 2, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
@ -1078,8 +1077,8 @@ static int ssl_tls13_write_certificate_verify_coordinate(
crt == NULL ||
ssl->conf->authmode == MBEDTLS_SSL_VERIFY_NONE )
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
return( SSL_WRITE_CERTIFICATE_VERIFY_SKIP );
MBEDTLS_SSL_DEBUG_MSG( 2, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
}
#endif /* MBEDTLS_SSL_CLI_C */
@ -1087,10 +1086,10 @@ static int ssl_tls13_write_certificate_verify_coordinate(
if( crt == NULL &&
ssl->conf->authmode != MBEDTLS_SSL_VERIFY_NONE )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no certificate" ) );
return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
MBEDTLS_SSL_DEBUG_MSG( 2, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
return( SSL_WRITE_CERTIFICATE_VERIFY_SEND );
return( 0 );
#else /* MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
((void) crt);
@ -1245,34 +1244,27 @@ static int ssl_tls13_finalize_certificate_verify( mbedtls_ssl_context *ssl )
int mbedtls_ssl_tls13_write_certificate_verify( mbedtls_ssl_context *ssl )
{
int ret = 0;
unsigned char *buf;
size_t buf_len, msg_len;
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
/* Coordination step: Check if we need to send a CertificateVerify */
MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_write_certificate_verify_coordinate( ssl ) );
if( ret == SSL_WRITE_CERTIFICATE_VERIFY_SEND )
{
unsigned char *buf;
size_t buf_len, msg_len;
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_start_handshake_msg( ssl,
MBEDTLS_SSL_HS_CERTIFICATE_VERIFY, &buf, &buf_len ) );
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_start_handshake_msg( ssl,
MBEDTLS_SSL_HS_CERTIFICATE_VERIFY, &buf, &buf_len ) );
MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_certificate_verify_body(
ssl, buf, buf + buf_len, &msg_len ) );
MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_certificate_verify_body(
ssl, buf, buf + buf_len, &msg_len ) );
mbedtls_ssl_tls13_add_hs_msg_to_checksum(
ssl, MBEDTLS_SSL_HS_CERTIFICATE_VERIFY, buf, msg_len );
/* Update state */
MBEDTLS_SSL_PROC_CHK( ssl_tls13_finalize_certificate_verify( ssl ) );
mbedtls_ssl_tls13_add_hs_msg_to_checksum(
ssl, MBEDTLS_SSL_HS_CERTIFICATE_VERIFY, buf, msg_len );
/* Update state */
MBEDTLS_SSL_PROC_CHK( ssl_tls13_finalize_certificate_verify( ssl ) );
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_finish_handshake_msg(
ssl, buf_len, msg_len ) );
}
else
{
MBEDTLS_SSL_PROC_CHK( ssl_tls13_finalize_certificate_verify( ssl ) );
}
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_finish_handshake_msg(
ssl, buf_len, msg_len ) );
cleanup:
@ -1578,17 +1570,13 @@ static int ssl_tls13_finalize_change_cipher_spec( mbedtls_ssl_context* ssl )
break;
case MBEDTLS_SSL_CLIENT_CCS_AFTER_SERVER_FINISHED:
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
if( ssl->handshake->client_auth )
{
mbedtls_ssl_handshake_set_state( ssl,
mbedtls_ssl_handshake_set_state( ssl,
MBEDTLS_SSL_CLIENT_CERTIFICATE );
}
else
#else
mbedtls_ssl_handshake_set_state( ssl,
MBEDTLS_SSL_CLIENT_FINISHED );
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
{
mbedtls_ssl_handshake_set_state( ssl,
MBEDTLS_SSL_CLIENT_FINISHED );
}
break;
default:
MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );

10
tests/ssl-opt.sh
View file

@ -9874,7 +9874,6 @@ run_test "TLS 1.3: CertificateRequest check, empty certificate - gnutls" \
-c "got a certificate request" \
-c "<= parse certificate request" \
-c "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE" \
-c "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY" \
-c "<= write empty client certificate"
requires_openssl_tls1_3
@ -9891,7 +9890,6 @@ run_test "TLS 1.3: CertificateRequest check, empty certificate - openssl" \
-c "got a certificate request" \
-c "<= parse certificate request" \
-c "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE" \
-c "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY" \
-c "<= write empty client certificate"
requires_openssl_tls1_3
@ -9939,9 +9937,7 @@ run_test "TLS 1.3: CertificateRequest check, no client certificate - openssl"
0 \
-c "=> parse certificate request" \
-c "got no certificate request" \
-c "<= parse certificate request" \
-C "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE" \
-C "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY"
-c "<= parse certificate request"
requires_gnutls_tls1_3
requires_gnutls_next_no_ticket
@ -9956,9 +9952,7 @@ run_test "TLS 1.3: CertificateRequest check, no client certificate - gnutls"
0 \
-c "=> parse certificate request" \
-c "got no certificate request" \
-c "<= parse certificate request" \
-C "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE" \
-C "client state: MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY"
-c "<= parse certificate request"
requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_3
requires_config_enabled MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE