#include <openssl/rand.h>
#include <openssl/engine.h>
#include "ssl_locl.h"
+#include "statem/statem_locl.h"
static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
+/*
+ * TODO(TLS1.3): SSL_get_session() and SSL_get1_session() are problematic in
+ * TLS1.3 because, unlike in earlier protocol versions, the session ticket
+ * may not have been sent yet even though a handshake has finished. The session
+ * ticket data could come in sometime later...or even change if multiple session
+ * ticket messages are sent from the server. We need to work out how to deal
+ * with this.
+ */
+
SSL_SESSION *SSL_get_session(const SSL *ssl)
/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
{
{
SSL_SESSION *ss;
+ if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
+ return NULL;
+
ss = OPENSSL_zalloc(sizeof(*ss));
if (ss == NULL) {
SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE);
dest->psk_identity = NULL;
#endif
dest->ciphers = NULL;
- dest->tlsext_hostname = NULL;
+ dest->ext.hostname = NULL;
#ifndef OPENSSL_NO_EC
- dest->tlsext_ecpointformatlist = NULL;
- dest->tlsext_ellipticcurvelist = NULL;
+ dest->ext.ecpointformats = NULL;
+ dest->ext.supportedgroups = NULL;
#endif
- dest->tlsext_tick = NULL;
+ dest->ext.tick = NULL;
#ifndef OPENSSL_NO_SRP
dest->srp_username = NULL;
#endif
goto err;
}
- if (src->tlsext_hostname) {
- dest->tlsext_hostname = OPENSSL_strdup(src->tlsext_hostname);
- if (dest->tlsext_hostname == NULL) {
+ if (src->ext.hostname) {
+ dest->ext.hostname = OPENSSL_strdup(src->ext.hostname);
+ if (dest->ext.hostname == NULL) {
goto err;
}
}
#ifndef OPENSSL_NO_EC
- if (src->tlsext_ecpointformatlist) {
- dest->tlsext_ecpointformatlist =
- OPENSSL_memdup(src->tlsext_ecpointformatlist,
- src->tlsext_ecpointformatlist_length);
- if (dest->tlsext_ecpointformatlist == NULL)
+ if (src->ext.ecpointformats) {
+ dest->ext.ecpointformats =
+ OPENSSL_memdup(src->ext.ecpointformats,
+ src->ext.ecpointformats_len);
+ if (dest->ext.ecpointformats == NULL)
goto err;
}
- if (src->tlsext_ellipticcurvelist) {
- dest->tlsext_ellipticcurvelist =
- OPENSSL_memdup(src->tlsext_ellipticcurvelist,
- src->tlsext_ellipticcurvelist_length);
- if (dest->tlsext_ellipticcurvelist == NULL)
+ if (src->ext.supportedgroups) {
+ dest->ext.supportedgroups =
+ OPENSSL_memdup(src->ext.supportedgroups,
+ src->ext.supportedgroups_len);
+ if (dest->ext.supportedgroups == NULL)
goto err;
}
#endif
if (ticket != 0) {
- dest->tlsext_tick =
- OPENSSL_memdup(src->tlsext_tick, src->tlsext_ticklen);
- if (dest->tlsext_tick == NULL)
+ dest->ext.tick =
+ OPENSSL_memdup(src->ext.tick, src->ext.ticklen);
+ if (dest->ext.tick == NULL)
goto err;
} else {
- dest->tlsext_tick_lifetime_hint = 0;
- dest->tlsext_ticklen = 0;
+ dest->ext.tick_lifetime_hint = 0;
+ dest->ext.ticklen = 0;
}
#ifndef OPENSSL_NO_SRP
const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
{
if (len)
- *len = s->session_id_length;
+ *len = (unsigned int)s->session_id_length;
return s->session_id;
}
const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
unsigned int *len)
{
if (len != NULL)
- *len = s->sid_ctx_length;
+ *len = (unsigned int)s->sid_ctx_length;
return s->sid_ctx;
}
* ServerHello extensions, and before recording the session
* ID received from the server, so this block is a noop.
*/
- if (s->tlsext_ticket_expected) {
+ if (s->ext.ticket_expected) {
ss->session_id_length = 0;
goto sess_id_done;
}
CRYPTO_THREAD_unlock(s->lock);
/* Choose a session ID */
memset(ss->session_id, 0, ss->session_id_length);
- tmp = ss->session_id_length;
+ tmp = (int)ss->session_id_length;
if (!cb(s, ss->session_id, &tmp)) {
/* The callback failed */
SSLerr(SSL_F_SSL_GET_NEW_SESSION,
ss->session_id_length = tmp;
/* Finally, check for a conflict */
if (SSL_has_matching_session_id(s, ss->session_id,
- ss->session_id_length)) {
+ (unsigned int)ss->session_id_length)) {
SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT);
SSL_SESSION_free(ss);
return (0);
}
sess_id_done:
- if (s->tlsext_hostname) {
- ss->tlsext_hostname = OPENSSL_strdup(s->tlsext_hostname);
- if (ss->tlsext_hostname == NULL) {
+ if (s->ext.hostname) {
+ ss->ext.hostname = OPENSSL_strdup(s->ext.hostname);
+ if (ss->ext.hostname == NULL) {
SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
SSL_SESSION_free(ss);
return 0;
* ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
* connection. It is only called by servers.
*
- * ext: ClientHello extensions (including length prefix)
- * session_id: ClientHello session ID.
+ * hello: The parsed ClientHello data
*
* Returns:
- * -1: error
- * 0: a session may have been found.
+ * -1: fatal error
+ * 0: no session found
+ * 1: a session may have been found.
*
* Side effects:
* - If a session is found then s->session is pointed at it (after freeing an
* existing session if need be) and s->verify_result is set from the session.
- * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
+ * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1
* if the server should issue a new session ticket (to 0 otherwise).
*/
-int ssl_get_prev_session(SSL *s, const PACKET *ext, const PACKET *session_id)
+int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello, int *al)
{
/* This is used only by servers. */
SSL_SESSION *ret = NULL;
int fatal = 0;
- int try_session_cache = 1;
- int r;
+ int try_session_cache = 0;
+ TICKET_RETURN r;
- if (PACKET_remaining(session_id) == 0)
- try_session_cache = 0;
+ if (SSL_IS_TLS13(s)) {
+ if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, EXT_CLIENT_HELLO,
+ hello->pre_proc_exts, NULL, 0, al)
+ || !tls_parse_extension(s, TLSEXT_IDX_psk, EXT_CLIENT_HELLO,
+ hello->pre_proc_exts, NULL, 0, al))
+ return -1;
- /* sets s->tlsext_ticket_expected and extended master secret flag */
- r = tls_check_serverhello_tlsext_early(s, ext, session_id, &ret);
- switch (r) {
- case -1: /* Error during processing */
- fatal = 1;
- goto err;
- case 0: /* No ticket found */
- case 1: /* Zero length ticket found */
- break; /* Ok to carry on processing session id. */
- case 2: /* Ticket found but not decrypted. */
- case 3: /* Ticket decrypted, *ret has been set. */
- try_session_cache = 0;
- break;
- default:
- abort();
+ ret = s->session;
+ } else {
+ /* sets s->ext.ticket_expected */
+ r = tls_get_ticket_from_client(s, hello, &ret);
+ switch (r) {
+ case TICKET_FATAL_ERR_MALLOC:
+ case TICKET_FATAL_ERR_OTHER:
+ fatal = 1;
+ goto err;
+ case TICKET_NONE:
+ case TICKET_EMPTY:
+ try_session_cache = 1;
+ break;
+ case TICKET_NO_DECRYPT:
+ case TICKET_SUCCESS:
+ case TICKET_SUCCESS_RENEW:
+ break;
+ }
}
if (try_session_cache &&
!(s->session_ctx->session_cache_mode &
SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) {
SSL_SESSION data;
- size_t local_len;
+
data.ssl_version = s->version;
- memset(data.session_id, 0, sizeof(data.session_id));
- if (!PACKET_copy_all(session_id, data.session_id,
- sizeof(data.session_id), &local_len)) {
- goto err;
- }
- data.session_id_length = local_len;
+ memcpy(data.session_id, hello->session_id, hello->session_id_len);
+ data.session_id_length = hello->session_id_len;
+
CRYPTO_THREAD_read_lock(s->session_ctx->lock);
ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data);
if (ret != NULL) {
if (try_session_cache &&
ret == NULL && s->session_ctx->get_session_cb != NULL) {
int copy = 1;
- ret = s->session_ctx->get_session_cb(s, PACKET_data(session_id),
- PACKET_remaining(session_id),
+
+ ret = s->session_ctx->get_session_cb(s, hello->session_id,
+ hello->session_id_len,
©);
if (ret != NULL) {
/* Now ret is non-NULL and we own one of its reference counts. */
+ /* Check TLS version consistency */
+ if (ret->ssl_version != s->version)
+ goto err;
+
if (ret->sid_ctx_length != s->sid_ctx_length
|| memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) {
/*
goto err;
}
- if (ret->cipher == NULL) {
- unsigned char buf[5], *p;
- unsigned long l;
-
- p = buf;
- l = ret->cipher_id;
- l2n(l, p);
- if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR)
- ret->cipher = ssl_get_cipher_by_char(s, &(buf[2]));
- else
- ret->cipher = ssl_get_cipher_by_char(s, &(buf[1]));
- if (ret->cipher == NULL)
- goto err;
- }
-
if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */
s->session_ctx->stats.sess_timeout++;
if (try_session_cache) {
goto err;
}
- s->session_ctx->stats.sess_hit++;
+ if (!SSL_IS_TLS13(s)) {
+ /* We already did this for TLS1.3 */
+ SSL_SESSION_free(s->session);
+ s->session = ret;
+ }
- SSL_SESSION_free(s->session);
- s->session = ret;
+ s->session_ctx->stats.sess_hit++;
s->verify_result = s->session->verify_result;
return 1;
err:
if (ret != NULL) {
SSL_SESSION_free(ret);
+ /* In TLSv1.3 s->session was already set to ret, so we NULL it out */
+ if (SSL_IS_TLS13(s))
+ s->session = NULL;
if (!try_session_cache) {
/*
* The session was from a ticket, so we should issue a ticket for
* the new session
*/
- s->tlsext_ticket_expected = 1;
+ s->ext.ticket_expected = 1;
}
}
- if (fatal)
+ if (fatal) {
+ *al = SSL_AD_INTERNAL_ERROR;
return -1;
- else
- return 0;
+ }
+
+ return 0;
}
int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
* obtain the same session from an external cache)
*/
s = NULL;
+ } else if (s == NULL &&
+ lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) {
+ /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */
+
+ /*
+ * ... so take back the extra reference and also don't add
+ * the session to the SSL_SESSION_list at this time
+ */
+ s = c;
}
/* Put at the head of the queue unless it is already in the cache */
if (ss == NULL)
return;
- CRYPTO_atomic_add(&ss->references, -1, &i, ss->lock);
+ CRYPTO_DOWN_REF(&ss->references, &i, ss->lock);
REF_PRINT_COUNT("SSL_SESSION", ss);
if (i > 0)
return;
X509_free(ss->peer);
sk_X509_pop_free(ss->peer_chain, X509_free);
sk_SSL_CIPHER_free(ss->ciphers);
- OPENSSL_free(ss->tlsext_hostname);
- OPENSSL_free(ss->tlsext_tick);
+ OPENSSL_free(ss->ext.hostname);
+ OPENSSL_free(ss->ext.tick);
#ifndef OPENSSL_NO_EC
- ss->tlsext_ecpointformatlist_length = 0;
- OPENSSL_free(ss->tlsext_ecpointformatlist);
- ss->tlsext_ellipticcurvelist_length = 0;
- OPENSSL_free(ss->tlsext_ellipticcurvelist);
+ OPENSSL_free(ss->ext.ecpointformats);
+ ss->ext.ecpointformats = NULL;
+ ss->ext.ecpointformats_len = 0;
+ OPENSSL_free(ss->ext.supportedgroups);
+ ss->ext.supportedgroups = NULL;
+ ss->ext.supportedgroups_len = 0;
#endif /* OPENSSL_NO_EC */
#ifndef OPENSSL_NO_PSK
OPENSSL_free(ss->psk_identity_hint);
{
int i;
- if (CRYPTO_atomic_add(&ss->references, 1, &i, ss->lock) <= 0)
+ if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0)
return 0;
REF_PRINT_COUNT("SSL_SESSION", ss);
const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s)
{
- return s->tlsext_hostname;
+ return s->ext.hostname;
}
int SSL_SESSION_has_ticket(const SSL_SESSION *s)
{
- return (s->tlsext_ticklen > 0) ? 1 : 0;
+ return (s->ext.ticklen > 0) ? 1 : 0;
}
unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
{
- return s->tlsext_tick_lifetime_hint;
+ return s->ext.tick_lifetime_hint;
}
void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick,
size_t *len)
{
- *len = s->tlsext_ticklen;
+ *len = s->ext.ticklen;
if (tick != NULL)
- *tick = s->tlsext_tick;
+ *tick = s->ext.tick;
}
X509 *SSL_SESSION_get0_peer(SSL_SESSION *s)
}
int SSL_set_session_secret_cb(SSL *s,
- int (*tls_session_secret_cb) (SSL *s,
- void *secret,
- int *secret_len,
- STACK_OF(SSL_CIPHER)
- *peer_ciphers,
- const SSL_CIPHER
- **cipher,
- void *arg),
+ tls_session_secret_cb_fn tls_session_secret_cb,
void *arg)
{
if (s == NULL)
return (0);
- s->tls_session_secret_cb = tls_session_secret_cb;
- s->tls_session_secret_cb_arg = arg;
+ s->ext.session_secret_cb = tls_session_secret_cb;
+ s->ext.session_secret_cb_arg = arg;
return (1);
}
{
if (s == NULL)
return (0);
- s->tls_session_ticket_ext_cb = cb;
- s->tls_session_ticket_ext_cb_arg = arg;
+ s->ext.session_ticket_cb = cb;
+ s->ext.session_ticket_cb_arg = arg;
return (1);
}
int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
{
if (s->version >= TLS1_VERSION) {
- OPENSSL_free(s->tlsext_session_ticket);
- s->tlsext_session_ticket = NULL;
- s->tlsext_session_ticket =
+ OPENSSL_free(s->ext.session_ticket);
+ s->ext.session_ticket = NULL;
+ s->ext.session_ticket =
OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
- if (s->tlsext_session_ticket == NULL) {
+ if (s->ext.session_ticket == NULL) {
SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE);
return 0;
}
- if (ext_data) {
- s->tlsext_session_ticket->length = ext_len;
- s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1;
- memcpy(s->tlsext_session_ticket->data, ext_data, ext_len);
+ if (ext_data != NULL) {
+ s->ext.session_ticket->length = ext_len;
+ s->ext.session_ticket->data = s->ext.session_ticket + 1;
+ memcpy(s->ext.session_ticket->data, ext_data, ext_len);
} else {
- s->tlsext_session_ticket->length = 0;
- s->tlsext_session_ticket->data = NULL;
+ s->ext.session_ticket->length = 0;
+ s->ext.session_ticket->data = NULL;
}
return 1;
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