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merge write sig_alg of tls12 and tls13

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Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>

# Conflicts:
#	library/ssl_misc.h
This commit is contained in:
Jerry Yu 2022-01-12 15:49:48 +08:00
parent 1abd1bc22f
commit f017ee4203
6 changed files with 183 additions and 182 deletions
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12
include/mbedtls/ssl.h
View file

@ -1359,11 +1359,11 @@ struct mbedtls_ssl_config
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
const int *MBEDTLS_PRIVATE(sig_hashes); /*!< allowed signature hashes */
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
const uint16_t *MBEDTLS_PRIVATE(tls13_sig_algs); /*!< allowed signature algorithms for TLS 1.3 */
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
const int *MBEDTLS_PRIVATE(sig_hashes); /*!< allowed signature hashes */
#endif
const uint16_t *MBEDTLS_PRIVATE(sig_algs); /*!< allowed signature algorithms */
#endif
#if defined(MBEDTLS_ECP_C) && !defined(MBEDTLS_DEPRECATED_REMOVED)
@ -3267,6 +3267,7 @@ void mbedtls_ssl_conf_groups( mbedtls_ssl_config *conf,
const uint16_t *groups );
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
/**
* \brief Set the allowed hashes for signatures during the handshake.
*
@ -3296,8 +3297,9 @@ void mbedtls_ssl_conf_groups( mbedtls_ssl_config *conf,
* \param hashes Ordered list of allowed signature hashes,
* terminated by \c MBEDTLS_MD_NONE.
*/
void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
void MBEDTLS_DEPRECATED mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
const int *hashes );
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
/**

85
library/ssl_cli.c
View file

@ -199,85 +199,6 @@ static int ssl_write_renegotiation_ext( mbedtls_ssl_context *ssl,
}
#endif /* MBEDTLS_SSL_RENEGOTIATION */
/*
* Only if we handle at least one key exchange that needs signatures.
*/
#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
static int ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
const unsigned char *end, size_t *out_len )
{
unsigned char *p = buf;
unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
*out_len = 0;
/*
* enum {
* none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
* sha512(6), (255)
* } HashAlgorithm;
*
* enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
* SignatureAlgorithm;
*
* struct {
* HashAlgorithm hash;
* SignatureAlgorithm signature;
* } SignatureAndHashAlgorithm;
*
* SignatureAndHashAlgorithm
* supported_signature_algorithms<2..2^16-2>;
*/
MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
/* Check if we have space for header and length field:
* - extension_type (2 bytes)
* - extension_data_length (2 bytes)
* - supported_signature_algorithms_length (2 bytes)
*/
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
p += 6;
/*
* Write supported_signature_algorithms
*/
supported_sig_alg = p;
for( const uint16_t *sig_alg = mbedtls_ssl_conf_get_sig_algs( ssl->conf );
*sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
{
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
p += 2;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
}
/* Length of supported_signature_algorithms */
supported_sig_alg_len = p - supported_sig_alg;
if( supported_sig_alg_len == 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
/* Write extension_type */
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
/* Write extension_data_length */
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
/* Write length of supported_signature_algorithms */
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
/* Output the total length of signature algorithms extension. */
*out_len = p - buf;
return( 0 );
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
@ -1109,10 +1030,10 @@ static int ssl_write_client_hello( mbedtls_ssl_context *ssl )
#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
if( ( ret = ssl_write_sig_alg_ext( ssl, p + 2 + ext_len,
end, &olen ) ) != 0 )
if( ( ret = mbedtls_ssl_write_sig_alg_ext( ssl, p + 2 + ext_len,
end, &olen ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "ssl_write_sig_alg_ext", ret );
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_sig_alg_ext", ret );
return( ret );
}
ext_len += olen;

16
library/ssl_misc.h
View file

@ -554,6 +554,7 @@ struct mbedtls_ssl_handshake_params
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
unsigned char group_list_heap_allocated;
unsigned char sig_algs_heap_allocated;
#endif
#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED)
@ -592,6 +593,7 @@ struct mbedtls_ssl_handshake_params
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
const uint16_t *group_list;
const uint16_t *sig_algs;
#endif
#if defined(MBEDTLS_DHM_C)
@ -1719,19 +1721,17 @@ void mbedtls_ssl_tls13_add_hs_msg_to_checksum( mbedtls_ssl_context *ssl,
unsigned char const *msg,
size_t msg_len );
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
/*
* Write TLS 1.3 Signature Algorithm extension
* Write Signature Algorithm extension
*/
int mbedtls_ssl_tls13_write_sig_alg_ext( mbedtls_ssl_context *ssl,
unsigned char *buf,
unsigned char *end,
size_t *out_len);
int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
const unsigned char *end, size_t *out_len);
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
/* Get handshake transcript */
int mbedtls_ssl_get_handshake_transcript( mbedtls_ssl_context *ssl,
const mbedtls_md_type_t md,
@ -1827,7 +1827,7 @@ static inline const void *mbedtls_ssl_conf_get_sig_algs(
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
if( mbedtls_ssl_conf_is_tls13_enabled( conf ))
return( conf->tls13_sig_algs );
return( conf->sig_algs );
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */

176
library/ssl_tls.c
View file

@ -3150,6 +3150,62 @@ static int ssl_handshake_init( mbedtls_ssl_context *ssl )
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_ECP_C */
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
/* Heap allocate and translate curve_list from internal to IANA group ids */
if ( mbedtls_ssl_conf_is_tls12_enabled( ssl->conf ) &&
ssl->conf->sig_hashes != NULL )
{
const int *md;
const int *sig_hashes = ssl->conf->sig_hashes;
size_t sig_algs_len = 0;
uint16_t *p;
for( md = sig_hashes; *md != MBEDTLS_MD_NONE; md++ )
{
if( mbedtls_ssl_hash_from_md_alg( *md ) == MBEDTLS_SSL_HASH_NONE )
continue;
#if defined(MBEDTLS_ECDSA_C)
sig_algs_len++;
#endif
#if defined(MBEDTLS_RSA_C)
sig_algs_len++;
#endif
}
if( sig_algs_len == 0 )
return( MBEDTLS_ERR_SSL_BAD_CONFIG );
ssl->handshake->sig_algs = mbedtls_calloc( sig_algs_len + 1,
sizeof( uint16_t ) );
if( ssl->handshake->sig_algs == NULL )
return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
p = (uint16_t *)ssl->handshake->sig_algs;
for( md = sig_hashes; *md != MBEDTLS_MD_NONE; md++ )
{
unsigned char hash = mbedtls_ssl_hash_from_md_alg( *md );
if( hash == MBEDTLS_SSL_HASH_NONE )
continue;
#if defined(MBEDTLS_ECDSA_C)
*p = (( hash << 8 ) | MBEDTLS_SSL_SIG_ECDSA);
p++;
#endif
#if defined(MBEDTLS_RSA_C)
*p = (( hash << 8 ) | MBEDTLS_SSL_SIG_RSA);
p++;
#endif
}
*p = MBEDTLS_TLS1_3_SIG_NONE;
ssl->handshake->sig_algs_heap_allocated = 1;
}
else
{
ssl->handshake->sig_algs = ssl->conf->sig_algs;
ssl->handshake->sig_algs_heap_allocated = 0;
}
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
return( 0 );
}
@ -3991,6 +4047,7 @@ void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
/*
* Set allowed/preferred hashes for handshake signatures
*/
@ -3998,16 +4055,19 @@ void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
const int *hashes )
{
conf->sig_hashes = hashes;
conf->sig_algs = NULL;
}
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
/* Configure allowed signature algorithms for use in TLS 1.3 */
/* Configure allowed signature algorithms for handshake */
void mbedtls_ssl_conf_sig_algs( mbedtls_ssl_config *conf,
const uint16_t* sig_algs )
{
conf->tls13_sig_algs = sig_algs;
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
conf->sig_hashes = NULL;
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
conf->sig_algs = sig_algs;
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#if defined(MBEDTLS_ECP_C)
@ -5498,6 +5558,15 @@ void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl )
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_ECP_C */
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
if ( ssl->handshake->sig_algs_heap_allocated )
mbedtls_free( (void*) handshake->sig_algs );
handshake->sig_algs = NULL;
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
if( ssl->conf->f_async_cancel != NULL && handshake->async_in_progress != 0 )
{
@ -6335,6 +6404,7 @@ void mbedtls_ssl_config_init( mbedtls_ssl_config *conf )
}
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
/* The selection should be the same as mbedtls_x509_crt_profile_default in
* x509_crt.c. Here, the order matters. Currently we favor stronger hashes,
* for no fundamental reason.
@ -6352,7 +6422,8 @@ static int ssl_preset_default_hashes[] = {
#endif
MBEDTLS_MD_NONE
};
#endif
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
/* The selection should be the same as mbedtls_x509_crt_profile_default in
* x509_crt.c, plus Montgomery curves for ECDHE. Here, the order matters:
@ -6395,11 +6466,17 @@ static int ssl_preset_suiteb_ciphersuites[] = {
};
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
static int ssl_preset_suiteb_hashes[] = {
MBEDTLS_MD_SHA256,
#if defined(MBEDTLS_SHA384_C)
MBEDTLS_MD_SHA384,
#endif
#if defined(MBEDTLS_SHA256_C)
MBEDTLS_MD_SHA256,
#endif
MBEDTLS_MD_NONE
};
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
static uint16_t ssl_preset_default_sig_algs[] = {
@ -6563,10 +6640,10 @@ int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
conf->sig_hashes = ssl_preset_suiteb_hashes;
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
conf->tls13_sig_algs = ssl_preset_suiteb_sig_algs;
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
conf->sig_algs = ssl_preset_suiteb_sig_algs;
#endif
#if defined(MBEDTLS_ECP_C) && !defined(MBEDTLS_DEPRECATED_REMOVED)
@ -6601,10 +6678,10 @@ int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
#endif
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
conf->sig_hashes = ssl_preset_default_hashes;
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
conf->tls13_sig_algs = ssl_preset_default_sig_algs;
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
conf->sig_algs = ssl_preset_default_sig_algs;
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#if defined(MBEDTLS_ECP_C) && !defined(MBEDTLS_DEPRECATED_REMOVED)
@ -7332,4 +7409,79 @@ int mbedtls_ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
/*
* mbedtls_ssl_tls13_write_sig_alg_ext( )
*
* enum {
* ....
* ecdsa_secp256r1_sha256( 0x0403 ),
* ecdsa_secp384r1_sha384( 0x0503 ),
* ecdsa_secp521r1_sha512( 0x0603 ),
* ....
* } SignatureScheme;
*
* struct {
* SignatureScheme supported_signature_algorithms<2..2^16-2>;
* } SignatureSchemeList;
*
* Only if we handle at least one key exchange that needs signatures.
*/
int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
const unsigned char *end, size_t *out_len )
{
unsigned char *p = buf;
unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
*out_len = 0;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
/* Check if we have space for header and length field:
* - extension_type (2 bytes)
* - extension_data_length (2 bytes)
* - supported_signature_algorithms_length (2 bytes)
*/
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
p += 6;
/*
* Write supported_signature_algorithms
*/
supported_sig_alg = p;
for( const uint16_t *sig_alg = mbedtls_ssl_conf_get_sig_algs( ssl->conf );
*sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
{
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
p += 2;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
}
/* Length of supported_signature_algorithms */
supported_sig_alg_len = p - supported_sig_alg;
if( supported_sig_alg_len == 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
/* Write extension_type */
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
/* Write extension_data_length */
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
/* Write length of supported_signature_algorithms */
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
/* Output the total length of signature algorithms extension. */
*out_len = p - buf;
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SIG_ALG;
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
return( 0 );
}
#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
#endif /* MBEDTLS_SSL_TLS_C */

2
library/ssl_tls13_client.c
View file

@ -630,7 +630,7 @@ static int ssl_tls13_write_client_hello_body( mbedtls_ssl_context *ssl,
return( ret );
p += output_len;
ret = mbedtls_ssl_tls13_write_sig_alg_ext( ssl, p, end, &output_len );
ret = mbedtls_ssl_write_sig_alg_ext( ssl, p, end, &output_len );
if( ret != 0 )
return( ret );
p += output_len;

74
library/ssl_tls13_generic.c
View file

@ -136,80 +136,6 @@ void mbedtls_ssl_tls13_add_hs_hdr_to_checksum( mbedtls_ssl_context *ssl,
}
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
/*
* mbedtls_ssl_tls13_write_sig_alg_ext( )
*
* enum {
* ....
* ecdsa_secp256r1_sha256( 0x0403 ),
* ecdsa_secp384r1_sha384( 0x0503 ),
* ecdsa_secp521r1_sha512( 0x0603 ),
* ....
* } SignatureScheme;
*
* struct {
* SignatureScheme supported_signature_algorithms<2..2^16-2>;
* } SignatureSchemeList;
*
* Only if we handle at least one key exchange that needs signatures.
*/
int mbedtls_ssl_tls13_write_sig_alg_ext( mbedtls_ssl_context *ssl,
unsigned char *buf,
unsigned char *end,
size_t *out_len )
{
unsigned char *p = buf;
unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
*out_len = 0;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
/* Check if we have space for header and length field:
* - extension_type (2 bytes)
* - extension_data_length (2 bytes)
* - supported_signature_algorithms_length (2 bytes)
*/
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
p += 6;
/*
* Write supported_signature_algorithms
*/
supported_sig_alg = p;
for( const uint16_t *sig_alg = mbedtls_ssl_conf_get_sig_algs( ssl->conf );
*sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
{
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
p += 2;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
}
/* Length of supported_signature_algorithms */
supported_sig_alg_len = p - supported_sig_alg;
if( supported_sig_alg_len == 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
/* Write extension_type */
MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
/* Write extension_data_length */
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
/* Write length of supported_signature_algorithms */
MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
/* Output the total length of signature algorithms extension. */
*out_len = p - buf;
ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SIG_ALG;
return( 0 );
}
/*
* STATE HANDLING: Read CertificateVerify
*/