Fail if we receive a response to an extension that we didn't request
We already did this on an ad-hoc per extension basis (for some extensions).
This centralises it and makes sure we do it for all extensions.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3418)
diff --git a/ssl/statem/extensions_srvr.c b/ssl/statem/extensions_srvr.c
index f85477c..9cde695 100644
--- a/ssl/statem/extensions_srvr.c
+++ b/ssl/statem/extensions_srvr.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
@@ -810,11 +810,12 @@
/*
* Add the server's renegotiation binding
*/
-int tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
if (!s->s3->send_connection_binding)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate)
|| !WPACKET_start_sub_packet_u16(pkt)
@@ -826,31 +827,33 @@
|| !WPACKET_close(pkt)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
-int tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
if (s->hit || s->servername_done != 1
|| s->session->ext.hostname == NULL)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name)
|| !WPACKET_put_bytes_u16(pkt, 0)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#ifndef OPENSSL_NO_EC
-int tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
@@ -860,7 +863,7 @@
size_t plistlen;
if (!using_ecc)
- return 1;
+ return EXT_RETURN_NOT_SENT;
tls1_get_formatlist(s, &plist, &plistlen);
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
@@ -868,29 +871,29 @@
|| !WPACKET_sub_memcpy_u8(pkt, plist, plistlen)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#endif
#ifndef OPENSSL_NO_EC
-int tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
- unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
const unsigned char *groups;
size_t numgroups, i, first = 1;
/* s->s3->group_id is non zero if we accepted a key_share */
if (s->s3->group_id == 0)
- return 1;
+ return EXT_RETURN_NOT_SENT;
/* Get our list of supported groups */
if (!tls1_get_curvelist(s, 0, &groups, &numgroups) || numgroups == 0) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
/* Copy group ID if supported */
@@ -902,7 +905,7 @@
* so we don't need to add this extension
*/
if (s->s3->group_id == GET_GROUP_ID(groups, 0))
- return 1;
+ return EXT_RETURN_NOT_SENT;
/* Add extension header */
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
@@ -911,7 +914,7 @@
|| !WPACKET_start_sub_packet_u16(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
first = 0;
@@ -919,53 +922,53 @@
if (!WPACKET_put_bytes_u16(pkt, GET_GROUP_ID(groups, 0))) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
}
}
if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#endif
-int tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
- unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
if (!s->ext.ticket_expected || !tls_use_ticket(s)) {
s->ext.ticket_expected = 0;
- return 1;
+ return EXT_RETURN_NOT_SENT;
}
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
|| !WPACKET_put_bytes_u16(pkt, 0)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#ifndef OPENSSL_NO_OCSP
-int tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
- unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
if (!s->ext.status_expected)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (SSL_IS_TLS13(s) && chainidx != 0)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
|| !WPACKET_start_sub_packet_u16(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
/*
@@ -976,17 +979,17 @@
if ((SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt))
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
- unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
const unsigned char *npa;
unsigned int npalen;
@@ -995,7 +998,7 @@
s->s3->npn_seen = 0;
if (!npn_seen || s->ctx->ext.npn_advertised_cb == NULL)
- return 1;
+ return EXT_RETURN_NOT_SENT;
ret = s->ctx->ext.npn_advertised_cb(s, &npa, &npalen,
s->ctx->ext.npn_advertised_cb_arg);
@@ -1004,20 +1007,20 @@
|| !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG,
ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
s->s3->npn_seen = 1;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#endif
-int tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx, int *al)
{
if (s->s3->alpn_selected == NULL)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt,
TLSEXT_TYPE_application_layer_protocol_negotiation)
@@ -1028,18 +1031,19 @@
|| !WPACKET_close(pkt)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#ifndef OPENSSL_NO_SRTP
-int tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
if (s->srtp_profile == NULL)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
|| !WPACKET_start_sub_packet_u16(pkt)
@@ -1048,18 +1052,18 @@
|| !WPACKET_put_bytes_u8(pkt, 0)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
#endif
-int tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx, int *al)
{
if (!s->ext.use_etm)
- return 1;
+ return EXT_RETURN_NOT_SENT;
/*
* Don't use encrypt_then_mac if AEAD or RC4 might want to disable
@@ -1070,35 +1074,36 @@
|| s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT
|| s->s3->tmp.new_cipher->algorithm_enc == SSL_eGOST2814789CNT12) {
s->ext.use_etm = 0;
- return 1;
+ return EXT_RETURN_NOT_SENT;
}
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
|| !WPACKET_put_bytes_u16(pkt, 0)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ETM, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
-int tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx, int *al)
{
if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
|| !WPACKET_put_bytes_u16(pkt, 0)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EMS, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
-int tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
#ifndef OPENSSL_NO_TLS1_3
unsigned char *encodedPoint;
@@ -1114,32 +1119,32 @@
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE,
ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
/* Must be resuming. */
if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) {
*al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_NOT_SENT;
}
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
skey = ssl_generate_pkey(ckey);
if (skey == NULL) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
- return 0;
+ return EXT_RETURN_FAIL;
}
/* Generate encoding of server key */
@@ -1147,7 +1152,7 @@
if (encoded_pt_len == 0) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_EC_LIB);
EVP_PKEY_free(skey);
- return 0;
+ return EXT_RETURN_FAIL;
}
if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len)
@@ -1155,7 +1160,7 @@
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
EVP_PKEY_free(skey);
OPENSSL_free(encodedPoint);
- return 0;
+ return EXT_RETURN_FAIL;
}
OPENSSL_free(encodedPoint);
@@ -1163,15 +1168,16 @@
s->s3->tmp.pkey = skey;
if (ssl_derive(s, skey, ckey, 1) == 0) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
#endif
- return 1;
+ return EXT_RETURN_SENT;
}
-int tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
const unsigned char cryptopro_ext[36] = {
0xfd, 0xe8, /* 65000 */
@@ -1185,60 +1191,61 @@
if (((s->s3->tmp.new_cipher->id & 0xFFFF) != 0x80
&& (s->s3->tmp.new_cipher->id & 0xFFFF) != 0x81)
|| (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG) == 0)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
-int tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, unsigned int context,
- X509 *x, size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx, int *al)
{
if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) {
if (s->max_early_data == 0)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data)
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_put_bytes_u32(pkt, s->max_early_data)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data)
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
-int tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
- size_t chainidx, int *al)
+EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx, int *al)
{
if (!s->hit)
- return 1;
+ return EXT_RETURN_NOT_SENT;
if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk)
|| !WPACKET_start_sub_packet_u16(pkt)
|| !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity)
|| !WPACKET_close(pkt)) {
SSLerr(SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR);
- return 0;
+ return EXT_RETURN_FAIL;
}
- return 1;
+ return EXT_RETURN_SENT;
}
