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Add received_sig_algs member to struct mbedtls_ssl_handshake_params

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Signed-off-by: Xiaofei Bai <xiaofei.bai@arm.com>
This commit is contained in:
Xiaofei Bai 2022-01-28 06:37:15 +00:00
parent 82f0a9a1db
commit f5b4d25cfa
2 changed files with 17 additions and 18 deletions
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6
library/ssl_misc.h
View file

@ -268,7 +268,7 @@
#define MBEDTLS_SSL_MAX_CURVE_LIST_LEN 65535
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
#define MBEDTLS_SIG_ALGS_SIZE 20
#define MBEDTLS_RECEIVED_SIG_ALGS_SIZE 20
#endif
/*
@ -600,6 +600,10 @@ struct mbedtls_ssl_handshake_params
mbedtls_ssl_sig_hash_set_t hash_algs; /*!< Set of suitable sig-hash pairs */
#endif
#if defined(MBEDTLS_X509_CRT_PARSE_C)
uint16_t received_sig_algs[MBEDTLS_RECEIVED_SIG_ALGS_SIZE];
#endif
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
const uint16_t *group_list;
const uint16_t *sig_algs;

29
library/ssl_tls13_generic.c
View file

@ -155,26 +155,25 @@ int mbedtls_ssl_tls13_parse_sig_alg_ext( mbedtls_ssl_context *ssl,
const unsigned char *end )
{
const unsigned char *p = buf;
size_t sig_algs_len = 0;
uint16_t *sig_algs;
const unsigned char *sig_algs_end;
size_t supported_sig_algs_len = 0;
const unsigned char *supported_sig_algs_end;
uint16_t sig_alg;
uint32_t common_idx = 0; /* iterate through received signature schemes list */
/* skip 2 bytes of signature algorithms length */
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 );
sig_algs_len = MBEDTLS_GET_UINT16_BE( p, 0 );
supported_sig_algs_len = MBEDTLS_GET_UINT16_BE( p, 0 );
p += 2;
sig_algs = mbedtls_calloc( MBEDTLS_SIG_ALGS_SIZE, sizeof( uint16_t ) );
if( sig_algs == NULL )
return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
memset( ssl->handshake->received_sig_algs, 0,
sizeof( ssl->handshake->received_sig_algs) );
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, sig_algs_len );
sig_algs_end = p + sig_algs_len;
while( p < sig_algs_end && common_idx + 1 < MBEDTLS_SIG_ALGS_SIZE )
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, supported_sig_algs_len );
supported_sig_algs_end = p + supported_sig_algs_len;
while( p < supported_sig_algs_end &&
common_idx + 1 < MBEDTLS_RECEIVED_SIG_ALGS_SIZE )
{
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, sig_algs_end, 2 );
MBEDTLS_SSL_CHK_BUF_READ_PTR( p, supported_sig_algs_end, 2 );
sig_alg = MBEDTLS_GET_UINT16_BE( p, 0 );
p += 2;
@ -184,7 +183,7 @@ int mbedtls_ssl_tls13_parse_sig_alg_ext( mbedtls_ssl_context *ssl,
if( mbedtls_ssl_sig_alg_is_offered( ssl, sig_alg ) &&
mbedtls_ssl_sig_alg_is_supported( ssl, sig_alg ) )
{
sig_algs[common_idx] = sig_alg;
ssl->handshake->received_sig_algs[common_idx] = sig_alg;
common_idx += 1;
}
}
@ -195,7 +194,6 @@ int mbedtls_ssl_tls13_parse_sig_alg_ext( mbedtls_ssl_context *ssl,
( "Signature algorithms extension length misaligned" ) );
MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR,
MBEDTLS_ERR_SSL_DECODE_ERROR );
mbedtls_free( sig_algs );
return( MBEDTLS_ERR_SSL_DECODE_ERROR );
}
@ -204,13 +202,10 @@ int mbedtls_ssl_tls13_parse_sig_alg_ext( mbedtls_ssl_context *ssl,
MBEDTLS_SSL_DEBUG_MSG( 3, ( "no signature algorithm in common" ) );
MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE,
MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
mbedtls_free( sig_algs );
return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
}
sig_algs[common_idx] = MBEDTLS_TLS1_3_SIG_NONE;
ssl->handshake->sig_algs = sig_algs;
ssl->handshake->sig_algs_heap_allocated = 1;
ssl->handshake->received_sig_algs[common_idx] = MBEDTLS_TLS1_3_SIG_NONE;
return( 0 );
}