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Make the anti-replay feature optional

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Fixes #6389

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6469)
This commit is contained in:
Matt Caswell 2018-06-07 09:11:05 +01:00
parent b6ff436fcb
commit 5d263fb78b
5 changed files with 18 additions and 4 deletions
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6
include/openssl/ssl.h
View file

@ -368,6 +368,12 @@ typedef int (*SSL_verify_cb)(int preverify_ok, X509_STORE_CTX *x509_ctx);
*/
# define SSL_OP_TLS_ROLLBACK_BUG 0x00800000U
/*
* Switches off automatic TLSv1.3 anti-replay protection for early data. This
* is a server-side option only (no effect on the client).
*/
# define SSL_OP_NO_ANTI_REPLAY 0x01000000U
# define SSL_OP_NO_SSLv3 0x02000000U
# define SSL_OP_NO_TLSv1 0x04000000U
# define SSL_OP_NO_TLSv1_2 0x08000000U

3
ssl/ssl_lib.c
View file

@ -3381,7 +3381,8 @@ void ssl_update_cache(SSL *s, int mode)
if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
&& (!SSL_IS_TLS13(s)
|| !s->server
|| s->max_early_data > 0
|| (s->max_early_data > 0
&& (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
|| s->session_ctx->remove_session_cb != NULL
|| (s->options & SSL_OP_NO_TICKET) != 0))
SSL_CTX_add_session(s->session_ctx, s->session);

3
ssl/ssl_locl.h
View file

@ -1205,6 +1205,9 @@ struct ssl_st {
# endif
SSL_psk_find_session_cb_func psk_find_session_cb;
SSL_psk_use_session_cb_func psk_use_session_cb;
int (*allow_early_data_cb)(SSL *s, SSL_SESSION *sess);
SSL_CTX *ctx;
/* Verified chain of peer */
STACK_OF(X509) *verified_chain;

4
ssl/statem/extensions_srvr.c
View file

@ -1165,7 +1165,8 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
* is no point in using full stateless tickets.
*/
if ((s->options & SSL_OP_NO_TICKET) != 0
|| s->max_early_data > 0)
|| (s->max_early_data > 0
&& (s->options & SSL_OP_NO_ANTI_REPLAY) == 0))
ret = tls_get_stateful_ticket(s, &identity, &sess);
else
ret = tls_decrypt_ticket(s, PACKET_data(&identity),
@ -1189,6 +1190,7 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
/* Check for replay */
if (s->max_early_data > 0
&& (s->options & SSL_OP_NO_ANTI_REPLAY) == 0
&& !SSL_CTX_remove_session(s->session_ctx, sess)) {
SSL_SESSION_free(sess);
sess = NULL;

6
ssl/statem/statem_srvr.c
View file

@ -4086,8 +4086,10 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt)
* SSL_OP_NO_TICKET is set - we are caching tickets anyway so there
* is no point in using full stateless tickets.
*/
if (((s->options & SSL_OP_NO_TICKET) != 0 || s->max_early_data > 0)
&& SSL_IS_TLS13(s)) {
if (SSL_IS_TLS13(s)
&& ((s->options & SSL_OP_NO_TICKET) != 0
|| (s->max_early_data > 0
&& (s->options & SSL_OP_NO_ANTI_REPLAY) == 0))) {
if (!construct_stateful_ticket(s, pkt, age_add_u.age_add, tick_nonce)) {
/* SSLfatal() already called */
goto err;