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Add signature algorithm supported check

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Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
This commit is contained in:
Jerry Yu 2022-01-19 17:43:22 +08:00
parent 7ddc38cedb
commit 1bab301c0d
3 changed files with 127 additions and 12 deletions
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124
library/ssl_misc.h
View File

@ -56,6 +56,8 @@
#include "mbedtls/psa_util.h"
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#include "common.h"
#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
!defined(inline) && !defined(__cplusplus)
#define inline __inline
@ -1842,6 +1844,127 @@ static inline const void *mbedtls_ssl_get_sig_algs(
return( NULL );
}
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
static inline int mbedtls_ssl_sig_alg_is_supported(
const mbedtls_ssl_context *ssl,
const uint16_t sig_alg )
{
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3)
{
/* High byte is hash */
unsigned char hash = MBEDTLS_BYTE_1( sig_alg );
unsigned char sig = MBEDTLS_BYTE_0( sig_alg );
switch( hash )
{
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_SSL_HASH_MD5:
break;
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_SSL_HASH_SHA1:
break;
#endif
#if defined(MBEDTLS_SHA224_C)
case MBEDTLS_SSL_HASH_SHA224:
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_SSL_HASH_SHA256:
break;
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_SSL_HASH_SHA384:
break;
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_SSL_HASH_SHA512:
break;
#endif
default:
return( 0 );
}
switch( sig )
{
#if defined(MBEDTLS_RSA_C)
case MBEDTLS_SSL_SIG_RSA:
break;
#endif
#if defined(MBEDTLS_ECDSA_C)
case MBEDTLS_SSL_SIG_ECDSA:
break;
#endif
default:
return( 0 );
}
return( 1 );
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_4)
{
switch( sig_alg )
{
#if defined(MBEDTLS_SHA256_C) && \
defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) && \
defined(MBEDTLS_ECDSA_C)
case MBEDTLS_TLS1_3_SIG_ECDSA_SECP256R1_SHA256:
break;
#endif /* MBEDTLS_SHA256_C &&
MBEDTLS_ECP_DP_SECP256R1_ENABLED &&
MBEDTLS_ECDSA_C */
#if defined(MBEDTLS_SHA384_C) && \
defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED) && \
defined(MBEDTLS_ECDSA_C)
case MBEDTLS_TLS1_3_SIG_ECDSA_SECP384R1_SHA384:
break;
#endif /* MBEDTLS_SHA384_C &&
MBEDTLS_ECP_DP_SECP384R1_ENABLED &&
MBEDTLS_ECDSA_C */
#if defined(MBEDTLS_SHA512_C) && \
defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED) && \
defined(MBEDTLS_ECDSA_C)
case MBEDTLS_TLS1_3_SIG_ECDSA_SECP521R1_SHA512:
break;
#endif /* MBEDTLS_SHA512_C &&
MBEDTLS_ECP_DP_SECP521R1_ENABLED &&
MBEDTLS_ECDSA_C */
#if defined(MBEDTLS_SHA256_C) && \
defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256:
break;
#endif /* MBEDTLS_SHA256_C &&
MBEDTLS_X509_RSASSA_PSS_SUPPORT */
#if defined(MBEDTLS_SHA256_C) && defined(MBEDTLS_RSA_C)
case MBEDTLS_TLS1_3_SIG_RSA_PKCS1_SHA256:
break;
#endif /* MBEDTLS_SHA256_C && MBEDTLS_RSA_C*/
default:
return( 0 );
}
return( 1 );
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
((void) ssl);
((void) sig_alg);
return( 0 );
}
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_RSA_C)
@ -1855,4 +1978,5 @@ static inline const void *mbedtls_ssl_get_sig_algs(
#define MBEDTLS_SSL_SIG_ALG( hash )
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_RSA_C */
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 && MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#endif /* ssl_misc.h */

13
library/ssl_srv.c
View File

@ -2802,26 +2802,15 @@ static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
{
/* High byte is hash */
unsigned char hash = MBEDTLS_BYTE_1( *sig_alg );
unsigned char sig = MBEDTLS_BYTE_0( *sig_alg );
if( mbedtls_ssl_set_calc_verify_md( ssl, hash ) )
continue;
#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_ECDSA_C)
if( sig != MBEDTLS_SSL_SIG_RSA && sig != MBEDTLS_SSL_SIG_ECDSA )
if( ! mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg ) )
continue;
#elif defined(MBEDTLS_RSA_C)
if( sig != MBEDTLS_SSL_SIG_RSA )
continue;
#elif defined(MBEDTLS_ECDSA_C)
if( sig != MBEDTLS_SSL_SIG_ECDSA )
continue;
#endif
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, sa_len );
sa_len += 2;
}
MBEDTLS_PUT_UINT16_BE( sa_len, p, 0 );

2
library/ssl_tls.c
View File

@ -7503,6 +7503,8 @@ int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
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;