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Print curve name instead of size in debugging

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Also refactor server-side curve selection
This commit is contained in:
Manuel Pégourié-Gonnard 2014-02-06 10:13:09 +01:00
parent ab24010b54
commit c3f6b62ccc
2 changed files with 29 additions and 40 deletions
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13
library/ssl_cli.c
View file

@ -1125,9 +1125,16 @@ static int ssl_parse_server_dh_params( ssl_context *ssl, unsigned char **p,
defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
static int ssl_check_server_ecdh_params( const ssl_context *ssl )
{
// TODO: print name instead
SSL_DEBUG_MSG( 2, ( "ECDH curve size: %d",
(int) ssl->handshake->ecdh_ctx.grp.nbits ) );
const ecp_curve_info *curve_info;
curve_info = ecp_curve_info_from_grp_id( ssl->handshake->ecdh_ctx.grp.id );
if( curve_info == NULL )
{
SSL_DEBUG_MSG( 1, ( "Should never happen" ) );
return( -1 );
}
SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
#if defined(POLARSSL_SSL_ECP_SET_CURVES)
if( ! ssl_curve_is_acceptable( ssl, ssl->handshake->ecdh_ctx.grp.id ) )

56
library/ssl_srv.c
View file

@ -536,7 +536,7 @@ static int ssl_parse_supported_elliptic_curves( ssl_context *ssl,
return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO );
}
/* Don't allow our peer to make use allocated too much memory,
/* Don't allow our peer to make us allocate too much memory,
* and leave room for a final 0 */
our_size = list_size / 2 + 1;
if( our_size > POLARSSL_ECP_DP_MAX )
@ -2105,54 +2105,36 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
* ECPoint public;
* } ServerECDHParams;
*/
ecp_group_id grp_id;
const ecp_curve_info **curve;
#if defined(POLARSSL_SSL_SET_CURVES)
unsigned int pref_idx, curv_idx, found;
const ecp_group_id *gid;
/* Match our preference list against the agreed curves */
for( pref_idx = 0, found = 0;
ssl->curve_list[pref_idx] != POLARSSL_ECP_DP_NONE;
pref_idx++ )
/* Match our preference list against the offered curves */
for( gid = ssl->curve_list; *gid != POLARSSL_ECP_DP_NONE; gid++ )
for( curve = ssl->handshake->curves; *curve != NULL; curve++ )
if( (*curve)->grp_id == *gid )
goto curve_matching_done;
curve_matching_done:
#else
curve = ssl->handshake->curves;
#endif
if( *curve == NULL )
{
/* Look through the agreed curve list */
for( curv_idx = 0;
ssl->handshake->curves[curv_idx] != NULL;
curv_idx++ )
{
if (ssl->handshake->curves[curv_idx]->grp_id ==
ssl->curve_list[pref_idx] )
{
/* We found our most preferred curve */
found = 1;
break;
}
}
/* Exit the search if we have found our curve */
if( found == 1 )
break;
SSL_DEBUG_MSG( 1, ( "no matching curve for ECDHE" ) );
return( POLARSSL_ERR_SSL_NO_CIPHER_CHOSEN );
}
/*
* If we haven't found any allowed / preferred curve,
* ssl->curve_list[pref_idx] will contain POLARSSL_ECP_DP_NONE and
* ecp_use_known_dp() will fail.
*/
grp_id = ssl->curve_list[pref_idx];
#else
grp_id = ssl->handshake->curves[0]->grp_id;
#endif /* POLARSSL_SSL_SET_CURVES */
SSL_DEBUG_MSG( 2, ( "ECDHE curve: %s", (*curve)->name ) );
if( ( ret = ecp_use_known_dp( &ssl->handshake->ecdh_ctx.grp,
grp_id ) ) != 0 )
(*curve)->grp_id ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ecp_use_known_dp", ret );
return( ret );
}
SSL_DEBUG_MSG( 2, ( "ECDH curve size: %d",
(int) ssl->handshake->ecdh_ctx.grp.nbits ) );
if( ( ret = ecdh_make_params( &ssl->handshake->ecdh_ctx, &len,
p, SSL_MAX_CONTENT_LEN - n,
ssl->f_rng, ssl->p_rng ) ) != 0 )