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Convert TLS1.3 functions to get_supported_groups

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Signed-off-by: Brett Warren <brett.warren@arm.com>
This commit is contained in:
Brett Warren 2021-10-06 09:32:11 +01:00
parent 25386b7652
commit 14efd33a6c
1 changed files with 17 additions and 19 deletions
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36
library/ssl_tls13_client.c
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@ -117,36 +117,35 @@ static int ssl_tls13_write_supported_versions_ext( mbedtls_ssl_context *ssl,
* 'elliptic_curves' and only contained elliptic curve groups.
*/
static int ssl_tls13_write_named_group_list_ecdhe( mbedtls_ssl_context *ssl,
unsigned char *buf,
unsigned char *end,
size_t *olen )
unsigned char *buf,
unsigned char *end,
size_t *olen )
{
unsigned char *p = buf;
*olen = 0;
if( ssl->conf->curve_list == NULL )
const uint16_t *group_list = mbedtls_ssl_get_groups( ssl );
if( group_list == NULL )
return( MBEDTLS_ERR_SSL_BAD_CONFIG );
for ( const mbedtls_ecp_group_id *grp_id = ssl->conf->curve_list;
*grp_id != MBEDTLS_ECP_DP_NONE;
grp_id++ )
for ( ; *group_list != 0; group_list++ )
{
const mbedtls_ecp_curve_info *info;
info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
info = mbedtls_ecp_curve_info_from_tls_id( *group_list );
if( info == NULL )
continue;
if( !mbedtls_ssl_tls13_named_group_is_ecdhe( info->tls_id ) )
if( !mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) )
continue;
MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2);
MBEDTLS_PUT_UINT16_BE( info->tls_id, p, 0 );
MBEDTLS_PUT_UINT16_BE( *group_list, p, 0 );
p += 2;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "NamedGroup: %s ( %x )",
mbedtls_ecp_curve_info_from_tls_id( info->tls_id )->name,
info->tls_id ) );
info->name, *group_list ) );
}
*olen = p - buf;
@ -301,20 +300,19 @@ static int ssl_tls13_get_default_group_id( mbedtls_ssl_context *ssl,
#if defined(MBEDTLS_ECDH_C)
const uint16_t *group_list = mbedtls_ssl_get_groups( ssl );
/* Pick first available ECDHE group compatible with TLS 1.3 */
if( ssl->conf->curve_list == NULL )
if( group_list == NULL )
return( MBEDTLS_ERR_SSL_BAD_CONFIG );
for ( const mbedtls_ecp_group_id *grp_id = ssl->conf->curve_list;
*grp_id != MBEDTLS_ECP_DP_NONE;
grp_id++ )
for ( ; *group_list != 0; group_list++ )
{
const mbedtls_ecp_curve_info *info;
info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
info = mbedtls_ecp_curve_info_from_tls_id( *group_list );
if( info != NULL &&
mbedtls_ssl_tls13_named_group_is_ecdhe( info->tls_id ) )
mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) )
{
*group_id = info->tls_id;
*group_id = *group_list;
return( 0 );
}
}