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thirdparty,net.mbedtls: update mbedtls to latest compatible version v3.3.0 (#21118)

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Turiiya 2024-03-28 07:46:21 +01:00 • committed by GitHub
parent cb402a3340
commit 64a336932c
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156 changed files with 16293 additions and 4396 deletions
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354
thirdparty/mbedtls/library/ssl_tls13_generic.c vendored
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@ -83,7 +83,7 @@ cleanup:
return( ret );
}
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
/*
* STATE HANDLING: Read CertificateVerify
*/
@ -213,13 +213,13 @@ static int ssl_tls13_parse_certificate_verify( mbedtls_ssl_context *ssl,
goto error;
}
if( mbedtls_ssl_tls13_get_pk_type_and_md_alg_from_sig_alg(
if( mbedtls_ssl_get_pk_type_and_md_alg_from_sig_alg(
algorithm, &sig_alg, &md_alg ) != 0 )
{
goto error;
}
hash_alg = mbedtls_psa_translate_md( md_alg );
hash_alg = mbedtls_hash_info_psa_from_md( md_alg );
if( hash_alg == 0 )
{
goto error;
@ -285,12 +285,12 @@ error:
return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
}
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
int mbedtls_ssl_tls13_process_certificate_verify( mbedtls_ssl_context *ssl )
{
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char verify_buffer[SSL_VERIFY_STRUCT_MAX_SIZE];
size_t verify_buffer_len;
@ -348,7 +348,7 @@ cleanup:
((void) ssl);
MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
}
/*
@ -357,7 +357,7 @@ cleanup:
*
*/
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
/*
* Structure of Certificate message:
@ -398,6 +398,7 @@ int mbedtls_ssl_tls13_parse_certificate( mbedtls_ssl_context *ssl,
size_t certificate_list_len = 0;
const unsigned char *p = buf;
const unsigned char *certificate_list_end;
mbedtls_ssl_handshake_params *handshake = ssl->handshake;
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 4 );
certificate_request_context_len = p[0];
@ -447,6 +448,7 @@ int mbedtls_ssl_tls13_parse_certificate( mbedtls_ssl_context *ssl,
while( p < certificate_list_end )
{
size_t cert_data_len, extensions_len;
const unsigned char *extensions_end;
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, certificate_list_end, 3 );
cert_data_len = MBEDTLS_GET_UINT24_BE( p, 0 );
@ -504,7 +506,48 @@ int mbedtls_ssl_tls13_parse_certificate( mbedtls_ssl_context *ssl,
extensions_len = MBEDTLS_GET_UINT16_BE( p, 0 );
p += 2;
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, certificate_list_end, extensions_len );
p += extensions_len;
extensions_end = p + extensions_len;
handshake->received_extensions = MBEDTLS_SSL_EXT_MASK_NONE;
while( p < extensions_end )
{
unsigned int extension_type;
size_t extension_data_len;
/*
* struct {
* ExtensionType extension_type; (2 bytes)
* opaque extension_data<0..2^16-1>;
* } Extension;
*/
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, 4 );
extension_type = MBEDTLS_GET_UINT16_BE( p, 0 );
extension_data_len = MBEDTLS_GET_UINT16_BE( p, 2 );
p += 4;
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, extension_data_len );
ret = mbedtls_ssl_tls13_check_received_extension(
ssl, MBEDTLS_SSL_HS_CERTIFICATE, extension_type,
MBEDTLS_SSL_TLS1_3_ALLOWED_EXTS_OF_CT );
if( ret != 0 )
return( ret );
switch( extension_type )
{
default:
MBEDTLS_SSL_PRINT_EXT(
3, MBEDTLS_SSL_HS_CERTIFICATE,
extension_type, "( ignored )" );
break;
}
p += extension_data_len;
}
MBEDTLS_SSL_PRINT_EXTS( 3, MBEDTLS_SSL_HS_CERTIFICATE,
handshake->received_extensions );
}
exit:
@ -512,7 +555,7 @@ exit:
if( p != end )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad Certificate message" ) );
MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR, \
MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR,
MBEDTLS_ERR_SSL_DECODE_ERROR );
return( MBEDTLS_ERR_SSL_DECODE_ERROR );
}
@ -534,9 +577,9 @@ int mbedtls_ssl_tls13_parse_certificate( mbedtls_ssl_context *ssl,
return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
}
#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
/* Validate certificate chain sent by the server. */
MBEDTLS_CHECK_RETURN_CRITICAL
@ -727,14 +770,14 @@ static int ssl_tls13_validate_certificate( mbedtls_ssl_context *ssl )
return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
}
#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
int mbedtls_ssl_tls13_process_certificate( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
unsigned char *buf;
size_t buf_len;
@ -752,12 +795,12 @@ int mbedtls_ssl_tls13_process_certificate( mbedtls_ssl_context *ssl )
buf, buf_len );
cleanup:
#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
return( ret );
}
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
/*
* enum {
* X509(0),
@ -843,6 +886,9 @@ static int ssl_tls13_write_certificate_body( mbedtls_ssl_context *ssl,
*out_len = p - buf;
MBEDTLS_SSL_PRINT_EXTS(
3, MBEDTLS_SSL_HS_CERTIFICATE, ssl->handshake->sent_extensions );
return( 0 );
}
@ -906,12 +952,8 @@ int mbedtls_ssl_tls13_check_sig_alg_cert_key_match( uint16_t sig_alg,
case MBEDTLS_SSL_SIG_RSA:
switch( sig_alg )
{
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256:
return( key_size <= 3072 );
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384:
return( key_size <= 7680 );
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA256: /* Intentional fallthrough */
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA384: /* Intentional fallthrough */
case MBEDTLS_TLS1_3_SIG_RSA_PSS_RSAE_SHA512:
return( 1 );
@ -927,43 +969,13 @@ int mbedtls_ssl_tls13_check_sig_alg_cert_key_match( uint16_t sig_alg,
return( 0 );
}
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_tls13_select_sig_alg_for_certificate_verify(
mbedtls_ssl_context *ssl,
mbedtls_pk_context *own_key,
uint16_t *algorithm )
{
uint16_t *sig_alg = ssl->handshake->received_sig_algs;
*algorithm = MBEDTLS_TLS1_3_SIG_NONE;
for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE ; sig_alg++ )
{
if( mbedtls_ssl_sig_alg_is_offered( ssl, *sig_alg ) &&
mbedtls_ssl_tls13_sig_alg_for_cert_verify_is_supported( *sig_alg ) &&
mbedtls_ssl_tls13_check_sig_alg_cert_key_match( *sig_alg, own_key ) )
{
MBEDTLS_SSL_DEBUG_MSG( 3,
( "select_sig_alg_for_certificate_verify:"
"selected signature algorithm %s [%04x]",
mbedtls_ssl_sig_alg_to_str( *sig_alg ),
*sig_alg ) );
*algorithm = *sig_alg;
return( 0 );
}
}
MBEDTLS_SSL_DEBUG_MSG( 2,
( "select_sig_alg_for_certificate_verify:"
"no suitable signature algorithm found" ) );
return( -1 );
}
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_tls13_write_certificate_verify_body( mbedtls_ssl_context *ssl,
unsigned char *buf,
unsigned char *end,
size_t *out_len )
{
int ret;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char *p = buf;
mbedtls_pk_context *own_key;
@ -971,14 +983,9 @@ static int ssl_tls13_write_certificate_verify_body( mbedtls_ssl_context *ssl,
size_t handshake_hash_len;
unsigned char verify_buffer[ SSL_VERIFY_STRUCT_MAX_SIZE ];
size_t verify_buffer_len;
mbedtls_pk_type_t pk_type = MBEDTLS_PK_NONE;
mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
psa_algorithm_t psa_algorithm = PSA_ALG_NONE;
uint16_t algorithm = MBEDTLS_TLS1_3_SIG_NONE;
uint16_t *sig_alg = ssl->handshake->received_sig_algs;
size_t signature_len = 0;
unsigned char verify_hash[ MBEDTLS_MD_MAX_SIZE ];
size_t verify_hash_len;
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
*out_len = 0;
@ -1011,64 +1018,84 @@ static int ssl_tls13_write_certificate_verify_body( mbedtls_ssl_context *ssl,
* opaque signature<0..2^16-1>;
* } CertificateVerify;
*/
ret = ssl_tls13_select_sig_alg_for_certificate_verify( ssl, own_key,
&algorithm );
if( ret != 0 )
/* Check there is space for the algorithm identifier (2 bytes) and the
* signature length (2 bytes).
*/
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 4 );
for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE ; sig_alg++ )
{
MBEDTLS_SSL_DEBUG_MSG( 1,
( "signature algorithm not in received or offered list." ) );
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
mbedtls_pk_type_t pk_type = MBEDTLS_PK_NONE;
mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
psa_algorithm_t psa_algorithm = PSA_ALG_NONE;
unsigned char verify_hash[PSA_HASH_MAX_SIZE];
size_t verify_hash_len;
MBEDTLS_SSL_DEBUG_MSG( 1, ( "Signature algorithm is %s",
mbedtls_ssl_sig_alg_to_str( algorithm ) ) );
if( !mbedtls_ssl_sig_alg_is_offered( ssl, *sig_alg ) )
continue;
if( !mbedtls_ssl_tls13_sig_alg_for_cert_verify_is_supported( *sig_alg ) )
continue;
if( !mbedtls_ssl_tls13_check_sig_alg_cert_key_match( *sig_alg, own_key ) )
continue;
if( mbedtls_ssl_get_pk_type_and_md_alg_from_sig_alg(
*sig_alg, &pk_type, &md_alg ) != 0 )
{
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
/* Hash verify buffer with indicated hash function */
psa_algorithm = mbedtls_hash_info_psa_from_md( md_alg );
status = psa_hash_compute( psa_algorithm,
verify_buffer,
verify_buffer_len,
verify_hash, sizeof( verify_hash ),
&verify_hash_len );
if( status != PSA_SUCCESS )
return( psa_ssl_status_to_mbedtls( status ) );
MBEDTLS_SSL_DEBUG_BUF( 3, "verify hash", verify_hash, verify_hash_len );
if( ( ret = mbedtls_pk_sign_ext( pk_type, own_key,
md_alg, verify_hash, verify_hash_len,
p + 4, (size_t)( end - ( p + 4 ) ), &signature_len,
ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "CertificateVerify signature failed with %s",
mbedtls_ssl_sig_alg_to_str( *sig_alg ) ) );
MBEDTLS_SSL_DEBUG_RET( 2, "mbedtls_pk_sign_ext", ret );
/* The signature failed. This is possible if the private key
* was not suitable for the signature operation as purposely we
* did not check its suitability completely. Let's try with
* another signature algorithm.
*/
continue;
}
MBEDTLS_SSL_DEBUG_MSG( 2, ( "CertificateVerify signature with %s",
mbedtls_ssl_sig_alg_to_str( *sig_alg ) ) );
break;
}
if( *sig_alg == MBEDTLS_TLS1_3_SIG_NONE )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "no suitable signature algorithm" ) );
MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
}
MBEDTLS_SSL_DEBUG_MSG( 2, ( "CertificateVerify with %s",
mbedtls_ssl_sig_alg_to_str( algorithm )) );
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
MBEDTLS_PUT_UINT16_BE( signature_len, p, 2 );
if( mbedtls_ssl_tls13_get_pk_type_and_md_alg_from_sig_alg(
algorithm, &pk_type, &md_alg ) != 0 )
{
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
*out_len = 4 + signature_len;
/* Check there is space for the algorithm identifier (2 bytes) and the
* signature length (2 bytes).
*/
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 4 );
MBEDTLS_PUT_UINT16_BE( algorithm, p, 0 );
p += 2;
/* Hash verify buffer with indicated hash function */
psa_algorithm = mbedtls_psa_translate_md( md_alg );
status = psa_hash_compute( psa_algorithm,
verify_buffer,
verify_buffer_len,
verify_hash,sizeof( verify_hash ),
&verify_hash_len );
if( status != PSA_SUCCESS )
return( psa_ssl_status_to_mbedtls( status ) );
MBEDTLS_SSL_DEBUG_BUF( 3, "verify hash", verify_hash, verify_hash_len );
if( ( ret = mbedtls_pk_sign_ext( pk_type, own_key,
md_alg, verify_hash, verify_hash_len,
p + 2, (size_t)( end - ( p + 2 ) ), &signature_len,
ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_sign", ret );
return( ret );
}
MBEDTLS_PUT_UINT16_BE( signature_len, p, 0 );
p += 2 + signature_len;
*out_len = (size_t)( p - buf );
return( ret );
return( 0 );
}
int mbedtls_ssl_tls13_write_certificate_verify( mbedtls_ssl_context *ssl )
@ -1097,7 +1124,7 @@ cleanup:
return( ret );
}
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
/*
*
@ -1347,6 +1374,39 @@ cleanup:
#endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */
/* Early Data Indication Extension
*
* struct {
* select ( Handshake.msg_type ) {
* ...
* case client_hello: Empty;
* case encrypted_extensions: Empty;
* };
* } EarlyDataIndication;
*/
#if defined(MBEDTLS_SSL_EARLY_DATA)
int mbedtls_ssl_tls13_write_early_data_ext( mbedtls_ssl_context *ssl,
unsigned char *buf,
const unsigned char *end,
size_t *out_len )
{
unsigned char *p = buf;
*out_len = 0;
((void) ssl);
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 4 );
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_EARLY_DATA, p, 0 );
MBEDTLS_PUT_UINT16_BE( 0, p, 2 );
*out_len = 4;
mbedtls_ssl_tls13_set_hs_sent_ext_mask( ssl, MBEDTLS_TLS_EXT_EARLY_DATA );
return( 0 );
}
#endif /* MBEDTLS_SSL_EARLY_DATA */
/* Reset SSL context and update hash for handling HRR.
*
* Replace Transcript-Hash(X) by
@ -1361,7 +1421,7 @@ cleanup:
int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char hash_transcript[ MBEDTLS_MD_MAX_SIZE + 4 ];
unsigned char hash_transcript[PSA_HASH_MAX_SIZE + 4];
size_t hash_len;
const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
uint16_t cipher_suite = ssl->session_negotiate->ciphersuite;
@ -1371,7 +1431,7 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
ret = mbedtls_ssl_get_handshake_transcript( ssl, ciphersuite_info->mac,
hash_transcript + 4,
MBEDTLS_MD_MAX_SIZE,
PSA_HASH_MAX_SIZE,
&hash_len );
if( ret != 0 )
{
@ -1386,9 +1446,9 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
hash_len += 4;
#if defined(MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA)
if( ciphersuite_info->mac == MBEDTLS_MD_SHA256 )
{
#if defined(MBEDTLS_SHA256_C)
MBEDTLS_SSL_DEBUG_BUF( 4, "Truncated SHA-256 handshake transcript",
hash_transcript, hash_len );
@ -1398,11 +1458,11 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
#else
mbedtls_sha256_starts( &ssl->handshake->fin_sha256, 0 );
#endif
#endif /* MBEDTLS_SHA256_C */
}
else if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
#endif /* MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA */
#if defined(MBEDTLS_HAS_ALG_SHA_384_VIA_MD_OR_PSA_BASED_ON_USE_PSA)
if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
{
#if defined(MBEDTLS_SHA384_C)
MBEDTLS_SSL_DEBUG_BUF( 4, "Truncated SHA-384 handshake transcript",
hash_transcript, hash_len );
@ -1410,14 +1470,13 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
psa_hash_abort( &ssl->handshake->fin_sha384_psa );
psa_hash_setup( &ssl->handshake->fin_sha384_psa, PSA_ALG_SHA_384 );
#else
mbedtls_sha512_starts( &ssl->handshake->fin_sha512, 1 );
mbedtls_sha512_starts( &ssl->handshake->fin_sha384, 1 );
#endif
#endif /* MBEDTLS_SHA384_C */
}
#if defined(MBEDTLS_SHA256_C) || defined(MBEDTLS_SHA384_C)
#endif /* MBEDTLS_HAS_ALG_SHA_384_VIA_MD_OR_PSA_BASED_ON_USE_PSA */
#if defined(MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA) || defined(MBEDTLS_HAS_ALG_SHA_384_VIA_MD_OR_PSA_BASED_ON_USE_PSA)
ssl->handshake->update_checksum( ssl, hash_transcript, hash_len );
#endif /* MBEDTLS_SHA256_C || MBEDTLS_SHA384_C */
#endif /* MBEDTLS_HAS_ALG_SHA_256_VIA_MD_OR_PSA_BASED_ON_USE_PSA || MBEDTLS_HAS_ALG_SHA_384_VIA_MD_OR_PSA_BASED_ON_USE_PSA */
return( ret );
}
@ -1505,4 +1564,61 @@ int mbedtls_ssl_tls13_generate_and_write_ecdh_key_exchange(
}
#endif /* MBEDTLS_ECDH_C */
/* RFC 8446 section 4.2
*
* If an implementation receives an extension which it recognizes and which is
* not specified for the message in which it appears, it MUST abort the handshake
* with an "illegal_parameter" alert.
*
*/
int mbedtls_ssl_tls13_check_received_extension(
mbedtls_ssl_context *ssl,
int hs_msg_type,
unsigned int received_extension_type,
uint32_t hs_msg_allowed_extensions_mask )
{
uint32_t extension_mask = mbedtls_ssl_get_extension_mask(
received_extension_type );
MBEDTLS_SSL_PRINT_EXT(
3, hs_msg_type, received_extension_type, "received" );
if( ( extension_mask & hs_msg_allowed_extensions_mask ) == 0 )
{
MBEDTLS_SSL_PRINT_EXT(
3, hs_msg_type, received_extension_type, "is illegal" );
MBEDTLS_SSL_PEND_FATAL_ALERT(
MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER,
MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER );
}
ssl->handshake->received_extensions |= extension_mask;
/*
* If it is a message containing extension responses, check that we
* previously sent the extension.
*/
switch( hs_msg_type )
{
case MBEDTLS_SSL_HS_SERVER_HELLO:
case MBEDTLS_SSL_TLS1_3_HS_HELLO_RETRY_REQUEST:
case MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS:
case MBEDTLS_SSL_HS_CERTIFICATE:
/* Check if the received extension is sent by peer message.*/
if( ( ssl->handshake->sent_extensions & extension_mask ) != 0 )
return( 0 );
break;
default:
return( 0 );
}
MBEDTLS_SSL_PRINT_EXT(
3, hs_msg_type, received_extension_type, "is unsupported" );
MBEDTLS_SSL_PEND_FATAL_ALERT(
MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT,
MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION );
return( MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION );
}
#endif /* MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_PROTO_TLS1_3 */