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Add server support for ECDH key exchanges

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This commit is contained in:
Manuel Pégourié-Gonnard 2013-12-12 11:14:16 +01:00
parent d18cc57962
commit 5538970d32
1 changed files with 55 additions and 3 deletions
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58
library/ssl_srv.c
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@ -1962,6 +1962,31 @@ static int ssl_write_certificate_request( ssl_context *ssl )
!POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED && !POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED &&
!POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */ !POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
#if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
static int ssl_get_ecdh_params_from_cert( ssl_context *ssl )
{
int ret;
if( ! pk_can_do( ssl_own_key( ssl ), POLARSSL_PK_ECKEY ) )
{
SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
return( POLARSSL_ERR_SSL_PK_TYPE_MISMATCH );
}
if( ( ret = ecdh_get_params( &ssl->handshake->ecdh_ctx,
pk_ec( *ssl_own_key( ssl ) ),
POLARSSL_ECDH_OURS ) ) != 0 )
{
SSL_DEBUG_RET( 1, ( "ecdh_get_params" ), ret );
return( ret );
}
return( 0 );
}
#endif /* POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
static int ssl_write_server_key_exchange( ssl_context *ssl ) static int ssl_write_server_key_exchange( ssl_context *ssl )
{ {
int ret; int ret;
@ -1983,6 +2008,9 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
SSL_DEBUG_MSG( 2, ( "=> write server key exchange" ) ); SSL_DEBUG_MSG( 2, ( "=> write server key exchange" ) );
#if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA || if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA ||
ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK || ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ||
ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK ) ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_RSA_PSK )
@ -1991,6 +2019,20 @@ static int ssl_write_server_key_exchange( ssl_context *ssl )
ssl->state++; ssl->state++;
return( 0 ); return( 0 );
} }
#endif
#if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_RSA ||
ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_ECDSA )
{
ssl_get_ecdh_params_from_cert( ssl );
SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
ssl->state++;
return( 0 );
}
#endif
#if defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED) || \ #if defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED) defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
@ -2533,9 +2575,13 @@ static int ssl_parse_client_key_exchange( ssl_context *ssl )
else else
#endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED */ #endif /* POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED */
#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \ #if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_RSA || if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_RSA ||
ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA ) ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA ||
ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_RSA ||
ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_ECDH_ECDSA )
{ {
size_t n = ssl->in_msg[3]; size_t n = ssl->in_msg[3];
@ -2555,6 +2601,10 @@ static int ssl_parse_client_key_exchange( ssl_context *ssl )
SSL_DEBUG_ECP( 3, "ECDH: Qp ", &ssl->handshake->ecdh_ctx.Qp ); SSL_DEBUG_ECP( 3, "ECDH: Qp ", &ssl->handshake->ecdh_ctx.Qp );
SSL_DEBUG_MSG( 0, ( "ECDH: id %d", ssl->handshake->ecdh_ctx.grp.id ) );
SSL_DEBUG_ECP( 0, "ECDH: Q ", &ssl->handshake->ecdh_ctx.Q );
SSL_DEBUG_MPI( 0, "ECDH: d ", &ssl->handshake->ecdh_ctx.d );
if( ( ret = ecdh_calc_secret( &ssl->handshake->ecdh_ctx, if( ( ret = ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
&ssl->handshake->pmslen, &ssl->handshake->pmslen,
ssl->handshake->premaster, ssl->handshake->premaster,
@ -2569,7 +2619,9 @@ static int ssl_parse_client_key_exchange( ssl_context *ssl )
} }
else else
#endif /* POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED || #endif /* POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */ POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
#if defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED) #if defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED)
if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK ) if( ciphersuite_info->key_exchange == POLARSSL_KEY_EXCHANGE_PSK )
{ {