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846e33c7 | 1 | /* |
b0edda11 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
c80149d9 | 3 | * Copyright 2005 Nokia. All rights reserved. |
f1fd4544 | 4 | * |
846e33c7 RS |
5 | * Licensed under the OpenSSL license (the "License"). You may not use |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
f1fd4544 | 9 | */ |
846e33c7 | 10 | |
d02b48c6 | 11 | #include <stdio.h> |
ec577822 | 12 | #include <openssl/rand.h> |
3c27208f | 13 | #include <openssl/engine.h> |
cd420b0b | 14 | #include "internal/refcount.h" |
6cc0b3c2 | 15 | #include "internal/cryptlib.h" |
d02b48c6 | 16 | #include "ssl_locl.h" |
1053a6e2 | 17 | #include "statem/statem_locl.h" |
d02b48c6 | 18 | |
58964a49 | 19 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); |
0f113f3e | 20 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); |
801294f8 | 21 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); |
58964a49 | 22 | |
e7a28df7 | 23 | /* |
e586eac8 MC |
24 | * SSL_get_session() and SSL_get1_session() are problematic in TLS1.3 because, |
25 | * unlike in earlier protocol versions, the session ticket may not have been | |
26 | * sent yet even though a handshake has finished. The session ticket data could | |
27 | * come in sometime later...or even change if multiple session ticket messages | |
28 | * are sent from the server. The preferred way for applications to obtain | |
29 | * a resumable session is to use SSL_CTX_sess_set_new_cb(). | |
e7a28df7 MC |
30 | */ |
31 | ||
0821bcd4 | 32 | SSL_SESSION *SSL_get_session(const SSL *ssl) |
52732b38 | 33 | /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ |
0f113f3e | 34 | { |
26a7d938 | 35 | return ssl->session; |
0f113f3e | 36 | } |
52732b38 BM |
37 | |
38 | SSL_SESSION *SSL_get1_session(SSL *ssl) | |
39 | /* variant of SSL_get_session: caller really gets something */ | |
0f113f3e MC |
40 | { |
41 | SSL_SESSION *sess; | |
42 | /* | |
43 | * Need to lock this all up rather than just use CRYPTO_add so that | |
44 | * somebody doesn't free ssl->session between when we check it's non-null | |
45 | * and when we up the reference count. | |
46 | */ | |
16203f7b | 47 | CRYPTO_THREAD_read_lock(ssl->lock); |
0f113f3e MC |
48 | sess = ssl->session; |
49 | if (sess) | |
16203f7b AG |
50 | SSL_SESSION_up_ref(sess); |
51 | CRYPTO_THREAD_unlock(ssl->lock); | |
52 | return sess; | |
0f113f3e MC |
53 | } |
54 | ||
6b691a5c | 55 | int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) |
0f113f3e | 56 | { |
26a7d938 | 57 | return CRYPTO_set_ex_data(&s->ex_data, idx, arg); |
0f113f3e | 58 | } |
58964a49 | 59 | |
0821bcd4 | 60 | void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) |
0f113f3e | 61 | { |
26a7d938 | 62 | return CRYPTO_get_ex_data(&s->ex_data, idx); |
0f113f3e | 63 | } |
58964a49 | 64 | |
6b691a5c | 65 | SSL_SESSION *SSL_SESSION_new(void) |
0f113f3e MC |
66 | { |
67 | SSL_SESSION *ss; | |
68 | ||
534a43ff MC |
69 | if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) |
70 | return NULL; | |
71 | ||
b51bce94 | 72 | ss = OPENSSL_zalloc(sizeof(*ss)); |
0f113f3e MC |
73 | if (ss == NULL) { |
74 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); | |
16203f7b | 75 | return NULL; |
0f113f3e | 76 | } |
0f113f3e MC |
77 | |
78 | ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ | |
79 | ss->references = 1; | |
80 | ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ | |
81 | ss->time = (unsigned long)time(NULL); | |
16203f7b AG |
82 | ss->lock = CRYPTO_THREAD_lock_new(); |
83 | if (ss->lock == NULL) { | |
84 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); | |
85 | OPENSSL_free(ss); | |
86 | return NULL; | |
87 | } | |
88 | ||
25a807bc F |
89 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) { |
90 | CRYPTO_THREAD_lock_free(ss->lock); | |
91 | OPENSSL_free(ss); | |
92 | return NULL; | |
93 | } | |
16203f7b | 94 | return ss; |
0f113f3e | 95 | } |
d02b48c6 | 96 | |
07927bed MC |
97 | SSL_SESSION *SSL_SESSION_dup(SSL_SESSION *src) |
98 | { | |
99 | return ssl_session_dup(src, 1); | |
100 | } | |
101 | ||
98ece4ee MC |
102 | /* |
103 | * Create a new SSL_SESSION and duplicate the contents of |src| into it. If | |
104 | * ticket == 0 then no ticket information is duplicated, otherwise it is. | |
105 | */ | |
106 | SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket) | |
107 | { | |
108 | SSL_SESSION *dest; | |
109 | ||
110 | dest = OPENSSL_malloc(sizeof(*src)); | |
111 | if (dest == NULL) { | |
112 | goto err; | |
113 | } | |
114 | memcpy(dest, src, sizeof(*dest)); | |
115 | ||
708cf593 MC |
116 | /* |
117 | * Set the various pointers to NULL so that we can call SSL_SESSION_free in | |
118 | * the case of an error whilst halfway through constructing dest | |
119 | */ | |
120 | #ifndef OPENSSL_NO_PSK | |
121 | dest->psk_identity_hint = NULL; | |
122 | dest->psk_identity = NULL; | |
123 | #endif | |
aff8c126 | 124 | dest->ext.hostname = NULL; |
aff8c126 | 125 | dest->ext.tick = NULL; |
eed3ec90 | 126 | dest->ext.alpn_selected = NULL; |
708cf593 MC |
127 | #ifndef OPENSSL_NO_SRP |
128 | dest->srp_username = NULL; | |
129 | #endif | |
1ee21259 TS |
130 | dest->peer_chain = NULL; |
131 | dest->peer = NULL; | |
df0fed9a | 132 | dest->ticket_appdata = NULL; |
51598215 | 133 | memset(&dest->ex_data, 0, sizeof(dest->ex_data)); |
9b6a8254 | 134 | |
708cf593 MC |
135 | /* We deliberately don't copy the prev and next pointers */ |
136 | dest->prev = NULL; | |
137 | dest->next = NULL; | |
138 | ||
139 | dest->references = 1; | |
140 | ||
16203f7b AG |
141 | dest->lock = CRYPTO_THREAD_lock_new(); |
142 | if (dest->lock == NULL) | |
143 | goto err; | |
144 | ||
1ee21259 TS |
145 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data)) |
146 | goto err; | |
147 | ||
148 | if (src->peer != NULL) { | |
149 | if (!X509_up_ref(src->peer)) | |
150 | goto err; | |
151 | dest->peer = src->peer; | |
152 | } | |
708cf593 | 153 | |
36f038f1 DSH |
154 | if (src->peer_chain != NULL) { |
155 | dest->peer_chain = X509_chain_up_ref(src->peer_chain); | |
156 | if (dest->peer_chain == NULL) | |
157 | goto err; | |
158 | } | |
98ece4ee MC |
159 | #ifndef OPENSSL_NO_PSK |
160 | if (src->psk_identity_hint) { | |
7644a9ae | 161 | dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint); |
98ece4ee MC |
162 | if (dest->psk_identity_hint == NULL) { |
163 | goto err; | |
164 | } | |
98ece4ee MC |
165 | } |
166 | if (src->psk_identity) { | |
7644a9ae | 167 | dest->psk_identity = OPENSSL_strdup(src->psk_identity); |
98ece4ee MC |
168 | if (dest->psk_identity == NULL) { |
169 | goto err; | |
170 | } | |
98ece4ee MC |
171 | } |
172 | #endif | |
173 | ||
98ece4ee | 174 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, |
a230b26e | 175 | &dest->ex_data, &src->ex_data)) { |
98ece4ee MC |
176 | goto err; |
177 | } | |
178 | ||
aff8c126 RS |
179 | if (src->ext.hostname) { |
180 | dest->ext.hostname = OPENSSL_strdup(src->ext.hostname); | |
181 | if (dest->ext.hostname == NULL) { | |
98ece4ee MC |
182 | goto err; |
183 | } | |
98ece4ee | 184 | } |
98ece4ee | 185 | |
1ee21259 | 186 | if (ticket != 0 && src->ext.tick != NULL) { |
aff8c126 RS |
187 | dest->ext.tick = |
188 | OPENSSL_memdup(src->ext.tick, src->ext.ticklen); | |
189 | if (dest->ext.tick == NULL) | |
98ece4ee | 190 | goto err; |
708cf593 | 191 | } else { |
aff8c126 RS |
192 | dest->ext.tick_lifetime_hint = 0; |
193 | dest->ext.ticklen = 0; | |
98ece4ee MC |
194 | } |
195 | ||
27232cc3 MC |
196 | if (src->ext.alpn_selected != NULL) { |
197 | dest->ext.alpn_selected = OPENSSL_memdup(src->ext.alpn_selected, | |
198 | src->ext.alpn_selected_len); | |
199 | if (dest->ext.alpn_selected == NULL) | |
eed3ec90 | 200 | goto err; |
eed3ec90 TS |
201 | } |
202 | ||
98ece4ee | 203 | #ifndef OPENSSL_NO_SRP |
98ece4ee | 204 | if (src->srp_username) { |
7644a9ae | 205 | dest->srp_username = OPENSSL_strdup(src->srp_username); |
98ece4ee MC |
206 | if (dest->srp_username == NULL) { |
207 | goto err; | |
208 | } | |
98ece4ee MC |
209 | } |
210 | #endif | |
211 | ||
df0fed9a TS |
212 | if (src->ticket_appdata != NULL) { |
213 | dest->ticket_appdata = | |
214 | OPENSSL_memdup(src->ticket_appdata, src->ticket_appdata_len); | |
215 | if (dest->ticket_appdata == NULL) | |
216 | goto err; | |
217 | } | |
218 | ||
98ece4ee | 219 | return dest; |
a230b26e | 220 | err: |
98ece4ee MC |
221 | SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); |
222 | SSL_SESSION_free(dest); | |
223 | return NULL; | |
224 | } | |
225 | ||
a230b26e | 226 | const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) |
0f113f3e MC |
227 | { |
228 | if (len) | |
348240c6 | 229 | *len = (unsigned int)s->session_id_length; |
0f113f3e MC |
230 | return s->session_id; |
231 | } | |
fddfc0af RG |
232 | const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s, |
233 | unsigned int *len) | |
234 | { | |
235 | if (len != NULL) | |
348240c6 | 236 | *len = (unsigned int)s->sid_ctx_length; |
fddfc0af RG |
237 | return s->sid_ctx; |
238 | } | |
4879ec7b | 239 | |
f9b0b452 | 240 | unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) |
0f113f3e MC |
241 | { |
242 | return s->compress_meth; | |
243 | } | |
244 | ||
245 | /* | |
246 | * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling | |
247 | * the ID with random junk repeatedly until we have no conflict is going to | |
248 | * complete in one iteration pretty much "most" of the time (btw: | |
249 | * understatement). So, if it takes us 10 iterations and we still can't avoid | |
250 | * a conflict - well that's a reasonable point to call it quits. Either the | |
251 | * RAND code is broken or someone is trying to open roughly very close to | |
252 | * 2^256 SSL sessions to our server. How you might store that many sessions | |
253 | * is perhaps a more interesting question ... | |
254 | */ | |
dc644fe2 GT |
255 | |
256 | #define MAX_SESS_ID_ATTEMPTS 10 | |
ae3947de | 257 | static int def_generate_session_id(SSL *ssl, unsigned char *id, |
0f113f3e | 258 | unsigned int *id_len) |
dc644fe2 | 259 | { |
0f113f3e MC |
260 | unsigned int retry = 0; |
261 | do | |
16cfc2c9 | 262 | if (RAND_bytes(id, *id_len) <= 0) |
0f113f3e MC |
263 | return 0; |
264 | while (SSL_has_matching_session_id(ssl, id, *id_len) && | |
265 | (++retry < MAX_SESS_ID_ATTEMPTS)) ; | |
266 | if (retry < MAX_SESS_ID_ATTEMPTS) | |
267 | return 1; | |
268 | /* else - woops a session_id match */ | |
269 | /* | |
270 | * XXX We should also check the external cache -- but the probability of | |
271 | * a collision is negligible, and we could not prevent the concurrent | |
272 | * creation of sessions with identical IDs since we currently don't have | |
273 | * means to atomically check whether a session ID already exists and make | |
274 | * a reservation for it if it does not (this problem applies to the | |
275 | * internal cache as well). | |
276 | */ | |
277 | return 0; | |
dc644fe2 GT |
278 | } |
279 | ||
a84e5c9a TS |
280 | int ssl_generate_session_id(SSL *s, SSL_SESSION *ss) |
281 | { | |
282 | unsigned int tmp; | |
283 | GEN_SESSION_CB cb = def_generate_session_id; | |
284 | ||
285 | switch (s->version) { | |
286 | case SSL3_VERSION: | |
287 | case TLS1_VERSION: | |
288 | case TLS1_1_VERSION: | |
289 | case TLS1_2_VERSION: | |
290 | case TLS1_3_VERSION: | |
291 | case DTLS1_BAD_VER: | |
292 | case DTLS1_VERSION: | |
293 | case DTLS1_2_VERSION: | |
294 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
295 | break; | |
296 | default: | |
f63a17d6 MC |
297 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, |
298 | SSL_R_UNSUPPORTED_SSL_VERSION); | |
a84e5c9a TS |
299 | return 0; |
300 | } | |
301 | ||
302 | /*- | |
303 | * If RFC5077 ticket, use empty session ID (as server). | |
304 | * Note that: | |
305 | * (a) ssl_get_prev_session() does lookahead into the | |
306 | * ClientHello extensions to find the session ticket. | |
307 | * When ssl_get_prev_session() fails, statem_srvr.c calls | |
308 | * ssl_get_new_session() in tls_process_client_hello(). | |
309 | * At that point, it has not yet parsed the extensions, | |
310 | * however, because of the lookahead, it already knows | |
311 | * whether a ticket is expected or not. | |
312 | * | |
313 | * (b) statem_clnt.c calls ssl_get_new_session() before parsing | |
314 | * ServerHello extensions, and before recording the session | |
315 | * ID received from the server, so this block is a noop. | |
316 | */ | |
317 | if (s->ext.ticket_expected) { | |
318 | ss->session_id_length = 0; | |
319 | return 1; | |
320 | } | |
321 | ||
322 | /* Choose which callback will set the session ID */ | |
323 | CRYPTO_THREAD_read_lock(s->lock); | |
324 | CRYPTO_THREAD_read_lock(s->session_ctx->lock); | |
325 | if (s->generate_session_id) | |
326 | cb = s->generate_session_id; | |
327 | else if (s->session_ctx->generate_session_id) | |
328 | cb = s->session_ctx->generate_session_id; | |
329 | CRYPTO_THREAD_unlock(s->session_ctx->lock); | |
330 | CRYPTO_THREAD_unlock(s->lock); | |
331 | /* Choose a session ID */ | |
332 | memset(ss->session_id, 0, ss->session_id_length); | |
333 | tmp = (int)ss->session_id_length; | |
334 | if (!cb(s, ss->session_id, &tmp)) { | |
335 | /* The callback failed */ | |
f63a17d6 MC |
336 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, |
337 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); | |
a84e5c9a TS |
338 | return 0; |
339 | } | |
340 | /* | |
341 | * Don't allow the callback to set the session length to zero. nor | |
342 | * set it higher than it was. | |
343 | */ | |
344 | if (tmp == 0 || tmp > ss->session_id_length) { | |
345 | /* The callback set an illegal length */ | |
f63a17d6 MC |
346 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, |
347 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); | |
a84e5c9a TS |
348 | return 0; |
349 | } | |
350 | ss->session_id_length = tmp; | |
351 | /* Finally, check for a conflict */ | |
352 | if (SSL_has_matching_session_id(s, ss->session_id, | |
353 | (unsigned int)ss->session_id_length)) { | |
f63a17d6 MC |
354 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, |
355 | SSL_R_SSL_SESSION_ID_CONFLICT); | |
a84e5c9a TS |
356 | return 0; |
357 | } | |
358 | ||
359 | return 1; | |
360 | } | |
361 | ||
6b691a5c | 362 | int ssl_get_new_session(SSL *s, int session) |
0f113f3e MC |
363 | { |
364 | /* This gets used by clients and servers. */ | |
365 | ||
0f113f3e | 366 | SSL_SESSION *ss = NULL; |
0f113f3e | 367 | |
f63a17d6 MC |
368 | if ((ss = SSL_SESSION_new()) == NULL) { |
369 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_NEW_SESSION, | |
370 | ERR_R_MALLOC_FAILURE); | |
a84e5c9a | 371 | return 0; |
f63a17d6 | 372 | } |
0f113f3e MC |
373 | |
374 | /* If the context has a default timeout, use it */ | |
375 | if (s->session_ctx->session_timeout == 0) | |
376 | ss->timeout = SSL_get_default_timeout(s); | |
377 | else | |
378 | ss->timeout = s->session_ctx->session_timeout; | |
379 | ||
62adbcee RS |
380 | SSL_SESSION_free(s->session); |
381 | s->session = NULL; | |
0f113f3e MC |
382 | |
383 | if (session) { | |
32305f88 MC |
384 | if (SSL_IS_TLS13(s)) { |
385 | /* | |
386 | * We generate the session id while constructing the | |
387 | * NewSessionTicket in TLSv1.3. | |
388 | */ | |
389 | ss->session_id_length = 0; | |
390 | } else if (!ssl_generate_session_id(s, ss)) { | |
f63a17d6 | 391 | /* SSLfatal() already called */ |
0f113f3e | 392 | SSL_SESSION_free(ss); |
a84e5c9a | 393 | return 0; |
0f113f3e | 394 | } |
e481f9b9 | 395 | |
0f113f3e MC |
396 | } else { |
397 | ss->session_id_length = 0; | |
398 | } | |
399 | ||
cbe29648 | 400 | if (s->sid_ctx_length > sizeof(ss->sid_ctx)) { |
f63a17d6 MC |
401 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_NEW_SESSION, |
402 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
403 | SSL_SESSION_free(ss); |
404 | return 0; | |
405 | } | |
406 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
407 | ss->sid_ctx_length = s->sid_ctx_length; | |
408 | s->session = ss; | |
409 | ss->ssl_version = s->version; | |
410 | ss->verify_result = X509_V_OK; | |
411 | ||
e7f0d921 DSH |
412 | /* If client supports extended master secret set it in session */ |
413 | if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) | |
414 | ss->flags |= SSL_SESS_FLAG_EXTMS; | |
415 | ||
a84e5c9a | 416 | return 1; |
0f113f3e | 417 | } |
d02b48c6 | 418 | |
6cc0b3c2 MC |
419 | SSL_SESSION *lookup_sess_in_cache(SSL *s, const unsigned char *sess_id, |
420 | size_t sess_id_len) | |
421 | { | |
422 | SSL_SESSION *ret = NULL; | |
6cc0b3c2 MC |
423 | |
424 | if ((s->session_ctx->session_cache_mode | |
425 | & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP) == 0) { | |
426 | SSL_SESSION data; | |
427 | ||
428 | data.ssl_version = s->version; | |
429 | if (!ossl_assert(sess_id_len <= SSL_MAX_SSL_SESSION_ID_LENGTH)) | |
430 | return NULL; | |
431 | ||
432 | memcpy(data.session_id, sess_id, sess_id_len); | |
433 | data.session_id_length = sess_id_len; | |
434 | ||
435 | CRYPTO_THREAD_read_lock(s->session_ctx->lock); | |
436 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); | |
437 | if (ret != NULL) { | |
438 | /* don't allow other threads to steal it: */ | |
439 | SSL_SESSION_up_ref(ret); | |
440 | } | |
441 | CRYPTO_THREAD_unlock(s->session_ctx->lock); | |
442 | if (ret == NULL) | |
9ef9088c | 443 | tsan_counter(&s->session_ctx->stats.sess_miss); |
6cc0b3c2 MC |
444 | } |
445 | ||
446 | if (ret == NULL && s->session_ctx->get_session_cb != NULL) { | |
447 | int copy = 1; | |
448 | ||
449 | ret = s->session_ctx->get_session_cb(s, sess_id, sess_id_len, ©); | |
450 | ||
451 | if (ret != NULL) { | |
9ef9088c | 452 | tsan_counter(&s->session_ctx->stats.sess_cb_hit); |
6cc0b3c2 MC |
453 | |
454 | /* | |
455 | * Increment reference count now if the session callback asks us | |
456 | * to do so (note that if the session structures returned by the | |
457 | * callback are shared between threads, it must handle the | |
458 | * reference count itself [i.e. copy == 0], or things won't be | |
459 | * thread-safe). | |
460 | */ | |
461 | if (copy) | |
462 | SSL_SESSION_up_ref(ret); | |
463 | ||
464 | /* | |
465 | * Add the externally cached session to the internal cache as | |
466 | * well if and only if we are supposed to. | |
467 | */ | |
468 | if ((s->session_ctx->session_cache_mode & | |
469 | SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0) { | |
470 | /* | |
471 | * Either return value of SSL_CTX_add_session should not | |
472 | * interrupt the session resumption process. The return | |
473 | * value is intentionally ignored. | |
474 | */ | |
475 | (void)SSL_CTX_add_session(s->session_ctx, ret); | |
476 | } | |
477 | } | |
478 | } | |
479 | ||
480 | return ret; | |
481 | } | |
482 | ||
3a83462d MC |
483 | /*- |
484 | * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this | |
c519e89f BM |
485 | * connection. It is only called by servers. |
486 | * | |
de7d61d5 | 487 | * hello: The parsed ClientHello data |
c519e89f BM |
488 | * |
489 | * Returns: | |
1053a6e2 MC |
490 | * -1: fatal error |
491 | * 0: no session found | |
492 | * 1: a session may have been found. | |
c519e89f BM |
493 | * |
494 | * Side effects: | |
495 | * - If a session is found then s->session is pointed at it (after freeing an | |
496 | * existing session if need be) and s->verify_result is set from the session. | |
aff8c126 | 497 | * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1 |
c519e89f BM |
498 | * if the server should issue a new session ticket (to 0 otherwise). |
499 | */ | |
f63a17d6 | 500 | int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello) |
0f113f3e MC |
501 | { |
502 | /* This is used only by servers. */ | |
b56bce4f | 503 | |
0f113f3e | 504 | SSL_SESSION *ret = NULL; |
9ef9088c | 505 | int fatal = 0; |
1053a6e2 | 506 | int try_session_cache = 0; |
61fb5923 | 507 | SSL_TICKET_STATUS r; |
d02b48c6 | 508 | |
1053a6e2 | 509 | if (SSL_IS_TLS13(s)) { |
61fb5923 MC |
510 | /* |
511 | * By default we will send a new ticket. This can be overridden in the | |
512 | * ticket processing. | |
513 | */ | |
514 | s->ext.ticket_expected = 1; | |
fe874d27 MC |
515 | if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, |
516 | SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, | |
f63a17d6 | 517 | NULL, 0) |
fe874d27 | 518 | || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO, |
f63a17d6 | 519 | hello->pre_proc_exts, NULL, 0)) |
1053a6e2 MC |
520 | return -1; |
521 | ||
522 | ret = s->session; | |
523 | } else { | |
524 | /* sets s->ext.ticket_expected */ | |
525 | r = tls_get_ticket_from_client(s, hello, &ret); | |
526 | switch (r) { | |
df0fed9a TS |
527 | case SSL_TICKET_FATAL_ERR_MALLOC: |
528 | case SSL_TICKET_FATAL_ERR_OTHER: | |
1053a6e2 | 529 | fatal = 1; |
f63a17d6 MC |
530 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_PREV_SESSION, |
531 | ERR_R_INTERNAL_ERROR); | |
1053a6e2 | 532 | goto err; |
df0fed9a TS |
533 | case SSL_TICKET_NONE: |
534 | case SSL_TICKET_EMPTY: | |
6cc0b3c2 | 535 | if (hello->session_id_len > 0) { |
0afca811 | 536 | try_session_cache = 1; |
6cc0b3c2 MC |
537 | ret = lookup_sess_in_cache(s, hello->session_id, |
538 | hello->session_id_len); | |
539 | } | |
61c32649 | 540 | break; |
df0fed9a TS |
541 | case SSL_TICKET_NO_DECRYPT: |
542 | case SSL_TICKET_SUCCESS: | |
543 | case SSL_TICKET_SUCCESS_RENEW: | |
1053a6e2 | 544 | break; |
1053a6e2 | 545 | } |
0f113f3e | 546 | } |
c519e89f | 547 | |
0f113f3e MC |
548 | if (ret == NULL) |
549 | goto err; | |
550 | ||
551 | /* Now ret is non-NULL and we own one of its reference counts. */ | |
552 | ||
128ae276 MC |
553 | /* Check TLS version consistency */ |
554 | if (ret->ssl_version != s->version) | |
555 | goto err; | |
556 | ||
0f113f3e MC |
557 | if (ret->sid_ctx_length != s->sid_ctx_length |
558 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { | |
559 | /* | |
560 | * We have the session requested by the client, but we don't want to | |
561 | * use it in this context. | |
562 | */ | |
563 | goto err; /* treat like cache miss */ | |
564 | } | |
565 | ||
566 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { | |
567 | /* | |
568 | * We can't be sure if this session is being used out of context, | |
569 | * which is especially important for SSL_VERIFY_PEER. The application | |
570 | * should have used SSL[_CTX]_set_session_id_context. For this error | |
571 | * case, we generate an error instead of treating the event like a | |
572 | * cache miss (otherwise it would be easy for applications to | |
573 | * effectively disable the session cache by accident without anyone | |
574 | * noticing). | |
575 | */ | |
576 | ||
f63a17d6 MC |
577 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_PREV_SESSION, |
578 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); | |
0f113f3e MC |
579 | fatal = 1; |
580 | goto err; | |
581 | } | |
582 | ||
0f113f3e | 583 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ |
9ef9088c | 584 | tsan_counter(&s->session_ctx->stats.sess_timeout); |
0f113f3e MC |
585 | if (try_session_cache) { |
586 | /* session was from the cache, so remove it */ | |
587 | SSL_CTX_remove_session(s->session_ctx, ret); | |
588 | } | |
589 | goto err; | |
590 | } | |
591 | ||
e7f0d921 DSH |
592 | /* Check extended master secret extension consistency */ |
593 | if (ret->flags & SSL_SESS_FLAG_EXTMS) { | |
594 | /* If old session includes extms, but new does not: abort handshake */ | |
595 | if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS)) { | |
f63a17d6 MC |
596 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_GET_PREV_SESSION, |
597 | SSL_R_INCONSISTENT_EXTMS); | |
e7f0d921 DSH |
598 | fatal = 1; |
599 | goto err; | |
600 | } | |
601 | } else if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) { | |
602 | /* If new session includes extms, but old does not: do not resume */ | |
603 | goto err; | |
604 | } | |
605 | ||
1053a6e2 MC |
606 | if (!SSL_IS_TLS13(s)) { |
607 | /* We already did this for TLS1.3 */ | |
608 | SSL_SESSION_free(s->session); | |
609 | s->session = ret; | |
610 | } | |
0f113f3e | 611 | |
9ef9088c | 612 | tsan_counter(&s->session_ctx->stats.sess_hit); |
0f113f3e MC |
613 | s->verify_result = s->session->verify_result; |
614 | return 1; | |
8876bc05 BM |
615 | |
616 | err: | |
0f113f3e MC |
617 | if (ret != NULL) { |
618 | SSL_SESSION_free(ret); | |
1f5b44e9 | 619 | /* In TLSv1.3 s->session was already set to ret, so we NULL it out */ |
128ae276 MC |
620 | if (SSL_IS_TLS13(s)) |
621 | s->session = NULL; | |
e481f9b9 | 622 | |
0f113f3e MC |
623 | if (!try_session_cache) { |
624 | /* | |
625 | * The session was from a ticket, so we should issue a ticket for | |
626 | * the new session | |
627 | */ | |
aff8c126 | 628 | s->ext.ticket_expected = 1; |
0f113f3e | 629 | } |
0f113f3e | 630 | } |
f63a17d6 | 631 | if (fatal) |
0f113f3e | 632 | return -1; |
40f805ad MC |
633 | |
634 | return 0; | |
0f113f3e | 635 | } |
d02b48c6 | 636 | |
6b691a5c | 637 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) |
0f113f3e | 638 | { |
9ef9088c | 639 | int ret = 0; |
0f113f3e MC |
640 | SSL_SESSION *s; |
641 | ||
642 | /* | |
643 | * add just 1 reference count for the SSL_CTX's session cache even though | |
644 | * it has two ways of access: each session is in a doubly linked list and | |
645 | * an lhash | |
646 | */ | |
16203f7b | 647 | SSL_SESSION_up_ref(c); |
0f113f3e MC |
648 | /* |
649 | * if session c is in already in cache, we take back the increment later | |
650 | */ | |
651 | ||
16203f7b | 652 | CRYPTO_THREAD_write_lock(ctx->lock); |
0f113f3e MC |
653 | s = lh_SSL_SESSION_insert(ctx->sessions, c); |
654 | ||
655 | /* | |
656 | * s != NULL iff we already had a session with the given PID. In this | |
657 | * case, s == c should hold (then we did not really modify | |
658 | * ctx->sessions), or we're in trouble. | |
659 | */ | |
660 | if (s != NULL && s != c) { | |
661 | /* We *are* in trouble ... */ | |
662 | SSL_SESSION_list_remove(ctx, s); | |
663 | SSL_SESSION_free(s); | |
664 | /* | |
665 | * ... so pretend the other session did not exist in cache (we cannot | |
666 | * handle two SSL_SESSION structures with identical session ID in the | |
667 | * same cache, which could happen e.g. when two threads concurrently | |
668 | * obtain the same session from an external cache) | |
669 | */ | |
670 | s = NULL; | |
38088ce9 BE |
671 | } else if (s == NULL && |
672 | lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { | |
673 | /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ | |
674 | ||
675 | /* | |
676 | * ... so take back the extra reference and also don't add | |
677 | * the session to the SSL_SESSION_list at this time | |
678 | */ | |
679 | s = c; | |
0f113f3e MC |
680 | } |
681 | ||
682 | /* Put at the head of the queue unless it is already in the cache */ | |
683 | if (s == NULL) | |
684 | SSL_SESSION_list_add(ctx, c); | |
685 | ||
686 | if (s != NULL) { | |
687 | /* | |
688 | * existing cache entry -- decrement previously incremented reference | |
689 | * count because it already takes into account the cache | |
690 | */ | |
691 | ||
692 | SSL_SESSION_free(s); /* s == c */ | |
693 | ret = 0; | |
694 | } else { | |
695 | /* | |
696 | * new cache entry -- remove old ones if cache has become too large | |
697 | */ | |
698 | ||
699 | ret = 1; | |
700 | ||
701 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
a230b26e | 702 | while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) { |
0f113f3e MC |
703 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) |
704 | break; | |
705 | else | |
9ef9088c | 706 | tsan_counter(&ctx->stats.sess_cache_full); |
0f113f3e MC |
707 | } |
708 | } | |
709 | } | |
16203f7b AG |
710 | CRYPTO_THREAD_unlock(ctx->lock); |
711 | return ret; | |
0f113f3e | 712 | } |
d02b48c6 | 713 | |
6b691a5c | 714 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) |
801294f8 | 715 | { |
0f113f3e | 716 | return remove_session_lock(ctx, c, 1); |
801294f8 DSH |
717 | } |
718 | ||
0fda2e37 | 719 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) |
0f113f3e MC |
720 | { |
721 | SSL_SESSION *r; | |
722 | int ret = 0; | |
723 | ||
724 | if ((c != NULL) && (c->session_id_length != 0)) { | |
725 | if (lck) | |
16203f7b | 726 | CRYPTO_THREAD_write_lock(ctx->lock); |
66d7de16 | 727 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) != NULL) { |
0f113f3e | 728 | ret = 1; |
66d7de16 MC |
729 | r = lh_SSL_SESSION_delete(ctx->sessions, r); |
730 | SSL_SESSION_list_remove(ctx, r); | |
0f113f3e | 731 | } |
e4612d02 | 732 | c->not_resumable = 1; |
0f113f3e MC |
733 | |
734 | if (lck) | |
16203f7b | 735 | CRYPTO_THREAD_unlock(ctx->lock); |
0f113f3e | 736 | |
e4612d02 MC |
737 | if (ctx->remove_session_cb != NULL) |
738 | ctx->remove_session_cb(ctx, c); | |
c0a58e03 MH |
739 | |
740 | if (ret) | |
741 | SSL_SESSION_free(r); | |
0f113f3e MC |
742 | } else |
743 | ret = 0; | |
26a7d938 | 744 | return ret; |
0f113f3e | 745 | } |
d02b48c6 | 746 | |
6b691a5c | 747 | void SSL_SESSION_free(SSL_SESSION *ss) |
0f113f3e MC |
748 | { |
749 | int i; | |
d02b48c6 | 750 | |
e6e9170d RS |
751 | if (ss == NULL) |
752 | return; | |
2f545ae4 | 753 | CRYPTO_DOWN_REF(&ss->references, &i, ss->lock); |
f3f1cf84 | 754 | REF_PRINT_COUNT("SSL_SESSION", ss); |
0f113f3e MC |
755 | if (i > 0) |
756 | return; | |
f3f1cf84 | 757 | REF_ASSERT_ISNT(i < 0); |
d02b48c6 | 758 | |
0f113f3e | 759 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
58964a49 | 760 | |
cbe29648 RS |
761 | OPENSSL_cleanse(ss->master_key, sizeof(ss->master_key)); |
762 | OPENSSL_cleanse(ss->session_id, sizeof(ss->session_id)); | |
222561fe | 763 | X509_free(ss->peer); |
c34b0f99 | 764 | sk_X509_pop_free(ss->peer_chain, X509_free); |
aff8c126 RS |
765 | OPENSSL_free(ss->ext.hostname); |
766 | OPENSSL_free(ss->ext.tick); | |
ddac1974 | 767 | #ifndef OPENSSL_NO_PSK |
25aaa98a RS |
768 | OPENSSL_free(ss->psk_identity_hint); |
769 | OPENSSL_free(ss->psk_identity); | |
edc032b5 BL |
770 | #endif |
771 | #ifndef OPENSSL_NO_SRP | |
25aaa98a | 772 | OPENSSL_free(ss->srp_username); |
ed3883d2 | 773 | #endif |
f6370040 | 774 | OPENSSL_free(ss->ext.alpn_selected); |
df0fed9a | 775 | OPENSSL_free(ss->ticket_appdata); |
16203f7b | 776 | CRYPTO_THREAD_lock_free(ss->lock); |
4b45c6e5 | 777 | OPENSSL_clear_free(ss, sizeof(*ss)); |
0f113f3e | 778 | } |
d02b48c6 | 779 | |
16203f7b AG |
780 | int SSL_SESSION_up_ref(SSL_SESSION *ss) |
781 | { | |
782 | int i; | |
783 | ||
2f545ae4 | 784 | if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0) |
16203f7b AG |
785 | return 0; |
786 | ||
787 | REF_PRINT_COUNT("SSL_SESSION", ss); | |
788 | REF_ASSERT_ISNT(i < 2); | |
789 | return ((i > 1) ? 1 : 0); | |
790 | } | |
791 | ||
6b691a5c | 792 | int SSL_set_session(SSL *s, SSL_SESSION *session) |
0f113f3e | 793 | { |
e70656cf MC |
794 | ssl_clear_bad_session(s); |
795 | if (s->ctx->method != s->method) { | |
796 | if (!SSL_set_ssl_method(s, s->ctx->method)) | |
797 | return 0; | |
798 | } | |
0f113f3e | 799 | |
e70656cf | 800 | if (session != NULL) { |
16203f7b | 801 | SSL_SESSION_up_ref(session); |
e70656cf | 802 | s->verify_result = session->verify_result; |
0f113f3e | 803 | } |
e70656cf MC |
804 | SSL_SESSION_free(s->session); |
805 | s->session = session; | |
806 | ||
807 | return 1; | |
0f113f3e | 808 | } |
d02b48c6 | 809 | |
fddfc0af RG |
810 | int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, |
811 | unsigned int sid_len) | |
812 | { | |
813 | if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { | |
814 | SSLerr(SSL_F_SSL_SESSION_SET1_ID, | |
815 | SSL_R_SSL_SESSION_ID_TOO_LONG); | |
816 | return 0; | |
817 | } | |
818 | s->session_id_length = sid_len; | |
6aad9393 RG |
819 | if (sid != s->session_id) |
820 | memcpy(s->session_id, sid, sid_len); | |
fddfc0af RG |
821 | return 1; |
822 | } | |
823 | ||
6b691a5c | 824 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) |
0f113f3e MC |
825 | { |
826 | if (s == NULL) | |
26a7d938 | 827 | return 0; |
0f113f3e | 828 | s->timeout = t; |
208fb891 | 829 | return 1; |
0f113f3e | 830 | } |
d02b48c6 | 831 | |
0821bcd4 | 832 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) |
0f113f3e MC |
833 | { |
834 | if (s == NULL) | |
26a7d938 K |
835 | return 0; |
836 | return s->timeout; | |
0f113f3e | 837 | } |
d02b48c6 | 838 | |
0821bcd4 | 839 | long SSL_SESSION_get_time(const SSL_SESSION *s) |
0f113f3e MC |
840 | { |
841 | if (s == NULL) | |
26a7d938 K |
842 | return 0; |
843 | return s->time; | |
0f113f3e | 844 | } |
d02b48c6 | 845 | |
6b691a5c | 846 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) |
0f113f3e MC |
847 | { |
848 | if (s == NULL) | |
26a7d938 | 849 | return 0; |
0f113f3e | 850 | s->time = t; |
26a7d938 | 851 | return t; |
0f113f3e | 852 | } |
d02b48c6 | 853 | |
bd01f649 TS |
854 | int SSL_SESSION_get_protocol_version(const SSL_SESSION *s) |
855 | { | |
bd01f649 TS |
856 | return s->ssl_version; |
857 | } | |
858 | ||
5a43d511 MC |
859 | int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version) |
860 | { | |
861 | s->ssl_version = version; | |
862 | return 1; | |
863 | } | |
864 | ||
e9281323 RS |
865 | const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s) |
866 | { | |
867 | return s->cipher; | |
868 | } | |
1a993d1d MC |
869 | |
870 | int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher) | |
871 | { | |
872 | s->cipher = cipher; | |
873 | return 1; | |
874 | } | |
e9281323 | 875 | |
4b6b8487 LC |
876 | const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s) |
877 | { | |
aff8c126 | 878 | return s->ext.hostname; |
4b6b8487 LC |
879 | } |
880 | ||
67738645 MC |
881 | int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname) |
882 | { | |
883 | OPENSSL_free(s->ext.hostname); | |
884 | if (hostname == NULL) { | |
885 | s->ext.hostname = NULL; | |
886 | return 1; | |
887 | } | |
888 | s->ext.hostname = OPENSSL_strdup(hostname); | |
889 | ||
890 | return s->ext.hostname != NULL; | |
891 | } | |
892 | ||
f2baac27 MC |
893 | int SSL_SESSION_has_ticket(const SSL_SESSION *s) |
894 | { | |
aff8c126 | 895 | return (s->ext.ticklen > 0) ? 1 : 0; |
f2baac27 MC |
896 | } |
897 | ||
898 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) | |
899 | { | |
aff8c126 | 900 | return s->ext.tick_lifetime_hint; |
f2baac27 MC |
901 | } |
902 | ||
48593cb1 | 903 | void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick, |
a230b26e | 904 | size_t *len) |
b7c9187b | 905 | { |
aff8c126 | 906 | *len = s->ext.ticklen; |
61986d32 | 907 | if (tick != NULL) |
aff8c126 | 908 | *tick = s->ext.tick; |
b7c9187b MC |
909 | } |
910 | ||
fcc47578 MC |
911 | uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s) |
912 | { | |
913 | return s->ext.max_early_data; | |
914 | } | |
915 | ||
98e1d934 MC |
916 | int SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data) |
917 | { | |
918 | s->ext.max_early_data = max_early_data; | |
919 | ||
920 | return 1; | |
921 | } | |
922 | ||
67738645 MC |
923 | void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s, |
924 | const unsigned char **alpn, | |
925 | size_t *len) | |
926 | { | |
927 | *alpn = s->ext.alpn_selected; | |
928 | *len = s->ext.alpn_selected_len; | |
929 | } | |
930 | ||
931 | int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn, | |
932 | size_t len) | |
933 | { | |
934 | OPENSSL_free(s->ext.alpn_selected); | |
935 | if (alpn == NULL || len == 0) { | |
936 | s->ext.alpn_selected = NULL; | |
937 | s->ext.alpn_selected_len = 0; | |
938 | return 1; | |
939 | } | |
940 | s->ext.alpn_selected = OPENSSL_memdup(alpn, len); | |
941 | if (s->ext.alpn_selected == NULL) { | |
942 | s->ext.alpn_selected_len = 0; | |
943 | return 0; | |
944 | } | |
945 | s->ext.alpn_selected_len = len; | |
946 | ||
947 | return 1; | |
948 | } | |
949 | ||
08557cf2 | 950 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) |
0f113f3e MC |
951 | { |
952 | return s->peer; | |
953 | } | |
954 | ||
955 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, | |
956 | unsigned int sid_ctx_len) | |
957 | { | |
958 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
959 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, | |
960 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
961 | return 0; | |
962 | } | |
963 | s->sid_ctx_length = sid_ctx_len; | |
6aad9393 RG |
964 | if (sid_ctx != s->sid_ctx) |
965 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); | |
0f113f3e MC |
966 | |
967 | return 1; | |
968 | } | |
08557cf2 | 969 | |
e586eac8 MC |
970 | int SSL_SESSION_is_resumable(const SSL_SESSION *s) |
971 | { | |
972 | /* | |
973 | * In the case of EAP-FAST, we can have a pre-shared "ticket" without a | |
974 | * session ID. | |
975 | */ | |
976 | return !s->not_resumable | |
977 | && (s->session_id_length > 0 || s->ext.ticklen > 0); | |
978 | } | |
979 | ||
6b691a5c | 980 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) |
0f113f3e MC |
981 | { |
982 | long l; | |
983 | if (s == NULL) | |
26a7d938 | 984 | return 0; |
0f113f3e MC |
985 | l = s->session_timeout; |
986 | s->session_timeout = t; | |
26a7d938 | 987 | return l; |
0f113f3e | 988 | } |
413c4f45 | 989 | |
0821bcd4 | 990 | long SSL_CTX_get_timeout(const SSL_CTX *s) |
0f113f3e MC |
991 | { |
992 | if (s == NULL) | |
26a7d938 K |
993 | return 0; |
994 | return s->session_timeout; | |
0f113f3e | 995 | } |
413c4f45 | 996 | |
0f113f3e | 997 | int SSL_set_session_secret_cb(SSL *s, |
aff8c126 | 998 | tls_session_secret_cb_fn tls_session_secret_cb, |
0f113f3e MC |
999 | void *arg) |
1000 | { | |
1001 | if (s == NULL) | |
26a7d938 | 1002 | return 0; |
aff8c126 RS |
1003 | s->ext.session_secret_cb = tls_session_secret_cb; |
1004 | s->ext.session_secret_cb_arg = arg; | |
208fb891 | 1005 | return 1; |
0f113f3e | 1006 | } |
12bf56c0 DSH |
1007 | |
1008 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, | |
0f113f3e MC |
1009 | void *arg) |
1010 | { | |
1011 | if (s == NULL) | |
26a7d938 | 1012 | return 0; |
aff8c126 RS |
1013 | s->ext.session_ticket_cb = cb; |
1014 | s->ext.session_ticket_cb_arg = arg; | |
208fb891 | 1015 | return 1; |
0f113f3e | 1016 | } |
12bf56c0 DSH |
1017 | |
1018 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) | |
0f113f3e MC |
1019 | { |
1020 | if (s->version >= TLS1_VERSION) { | |
aff8c126 RS |
1021 | OPENSSL_free(s->ext.session_ticket); |
1022 | s->ext.session_ticket = NULL; | |
1023 | s->ext.session_ticket = | |
0f113f3e | 1024 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); |
aff8c126 | 1025 | if (s->ext.session_ticket == NULL) { |
0f113f3e MC |
1026 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); |
1027 | return 0; | |
1028 | } | |
1029 | ||
1ed327f7 | 1030 | if (ext_data != NULL) { |
aff8c126 RS |
1031 | s->ext.session_ticket->length = ext_len; |
1032 | s->ext.session_ticket->data = s->ext.session_ticket + 1; | |
1033 | memcpy(s->ext.session_ticket->data, ext_data, ext_len); | |
0f113f3e | 1034 | } else { |
aff8c126 RS |
1035 | s->ext.session_ticket->length = 0; |
1036 | s->ext.session_ticket->data = NULL; | |
0f113f3e MC |
1037 | } |
1038 | ||
1039 | return 1; | |
1040 | } | |
1041 | ||
1042 | return 0; | |
1043 | } | |
0f113f3e MC |
1044 | |
1045 | typedef struct timeout_param_st { | |
1046 | SSL_CTX *ctx; | |
1047 | long time; | |
1048 | LHASH_OF(SSL_SESSION) *cache; | |
1049 | } TIMEOUT_PARAM; | |
d02b48c6 | 1050 | |
2a056de8 | 1051 | static void timeout_cb(SSL_SESSION *s, TIMEOUT_PARAM *p) |
0f113f3e MC |
1052 | { |
1053 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
1054 | /* | |
1055 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
1056 | * locking overhead | |
1057 | */ | |
1058 | (void)lh_SSL_SESSION_delete(p->cache, s); | |
1059 | SSL_SESSION_list_remove(p->ctx, s); | |
1060 | s->not_resumable = 1; | |
1061 | if (p->ctx->remove_session_cb != NULL) | |
1062 | p->ctx->remove_session_cb(p->ctx, s); | |
1063 | SSL_SESSION_free(s); | |
1064 | } | |
1065 | } | |
d02b48c6 | 1066 | |
2a056de8 | 1067 | IMPLEMENT_LHASH_DOALL_ARG(SSL_SESSION, TIMEOUT_PARAM); |
3c914840 | 1068 | |
6b691a5c | 1069 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) |
0f113f3e MC |
1070 | { |
1071 | unsigned long i; | |
1072 | TIMEOUT_PARAM tp; | |
1073 | ||
1074 | tp.ctx = s; | |
1075 | tp.cache = s->sessions; | |
1076 | if (tp.cache == NULL) | |
1077 | return; | |
1078 | tp.time = t; | |
16203f7b | 1079 | CRYPTO_THREAD_write_lock(s->lock); |
739a1eb1 RS |
1080 | i = lh_SSL_SESSION_get_down_load(s->sessions); |
1081 | lh_SSL_SESSION_set_down_load(s->sessions, 0); | |
2a056de8 | 1082 | lh_SSL_SESSION_doall_TIMEOUT_PARAM(tp.cache, timeout_cb, &tp); |
739a1eb1 | 1083 | lh_SSL_SESSION_set_down_load(s->sessions, i); |
16203f7b | 1084 | CRYPTO_THREAD_unlock(s->lock); |
0f113f3e | 1085 | } |
d02b48c6 | 1086 | |
6b691a5c | 1087 | int ssl_clear_bad_session(SSL *s) |
0f113f3e MC |
1088 | { |
1089 | if ((s->session != NULL) && | |
1090 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
1091 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
e2bb9b9b | 1092 | SSL_CTX_remove_session(s->session_ctx, s->session); |
208fb891 | 1093 | return 1; |
0f113f3e | 1094 | } else |
26a7d938 | 1095 | return 0; |
0f113f3e | 1096 | } |
58964a49 RE |
1097 | |
1098 | /* locked by SSL_CTX in the calling function */ | |
6b691a5c | 1099 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1100 | { |
1101 | if ((s->next == NULL) || (s->prev == NULL)) | |
1102 | return; | |
1103 | ||
1104 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
1105 | /* last element in list */ | |
1106 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1107 | /* only one element in list */ | |
1108 | ctx->session_cache_head = NULL; | |
1109 | ctx->session_cache_tail = NULL; | |
1110 | } else { | |
1111 | ctx->session_cache_tail = s->prev; | |
1112 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1113 | } | |
1114 | } else { | |
1115 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1116 | /* first element in list */ | |
1117 | ctx->session_cache_head = s->next; | |
1118 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1119 | } else { | |
1120 | /* middle of list */ | |
1121 | s->next->prev = s->prev; | |
1122 | s->prev->next = s->next; | |
1123 | } | |
1124 | } | |
1125 | s->prev = s->next = NULL; | |
1126 | } | |
58964a49 | 1127 | |
6b691a5c | 1128 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1129 | { |
1130 | if ((s->next != NULL) && (s->prev != NULL)) | |
1131 | SSL_SESSION_list_remove(ctx, s); | |
1132 | ||
1133 | if (ctx->session_cache_head == NULL) { | |
1134 | ctx->session_cache_head = s; | |
1135 | ctx->session_cache_tail = s; | |
1136 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1137 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1138 | } else { | |
1139 | s->next = ctx->session_cache_head; | |
1140 | s->next->prev = s; | |
1141 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1142 | ctx->session_cache_head = s; | |
1143 | } | |
1144 | } | |
58964a49 | 1145 | |
7806f3dd | 1146 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
a230b26e | 1147 | int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess)) |
0f113f3e MC |
1148 | { |
1149 | ctx->new_session_cb = cb; | |
1150 | } | |
7806f3dd | 1151 | |
0f113f3e MC |
1152 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { |
1153 | return ctx->new_session_cb; | |
1154 | } | |
7806f3dd NL |
1155 | |
1156 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1157 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) |
1158 | { | |
1159 | ctx->remove_session_cb = cb; | |
1160 | } | |
7806f3dd | 1161 | |
0f113f3e MC |
1162 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, |
1163 | SSL_SESSION *sess) { | |
1164 | return ctx->remove_session_cb; | |
1165 | } | |
7806f3dd NL |
1166 | |
1167 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
0f113f3e | 1168 | SSL_SESSION *(*cb) (struct ssl_st *ssl, |
b6981744 EK |
1169 | const unsigned char *data, |
1170 | int len, int *copy)) | |
0f113f3e MC |
1171 | { |
1172 | ctx->get_session_cb = cb; | |
1173 | } | |
1174 | ||
1175 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
a230b26e EK |
1176 | const unsigned char |
1177 | *data, int len, | |
1178 | int *copy) { | |
0f113f3e MC |
1179 | return ctx->get_session_cb; |
1180 | } | |
1181 | ||
1182 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
1183 | void (*cb) (const SSL *ssl, int type, int val)) | |
1184 | { | |
1185 | ctx->info_callback = cb; | |
1186 | } | |
1187 | ||
1188 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
1189 | int val) { | |
1190 | return ctx->info_callback; | |
1191 | } | |
7806f3dd NL |
1192 | |
1193 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1194 | int (*cb) (SSL *ssl, X509 **x509, |
1195 | EVP_PKEY **pkey)) | |
1196 | { | |
1197 | ctx->client_cert_cb = cb; | |
1198 | } | |
7806f3dd | 1199 | |
0f113f3e MC |
1200 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, |
1201 | EVP_PKEY **pkey) { | |
1202 | return ctx->client_cert_cb; | |
1203 | } | |
7806f3dd | 1204 | |
368888bc DSH |
1205 | #ifndef OPENSSL_NO_ENGINE |
1206 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
0f113f3e MC |
1207 | { |
1208 | if (!ENGINE_init(e)) { | |
1209 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
1210 | return 0; | |
1211 | } | |
1212 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
1213 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
1214 | SSL_R_NO_CLIENT_CERT_METHOD); | |
1215 | ENGINE_finish(e); | |
1216 | return 0; | |
1217 | } | |
1218 | ctx->client_cert_engine = e; | |
1219 | return 1; | |
1220 | } | |
368888bc DSH |
1221 | #endif |
1222 | ||
7806f3dd | 1223 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, |
0f113f3e MC |
1224 | int (*cb) (SSL *ssl, |
1225 | unsigned char *cookie, | |
1226 | unsigned int *cookie_len)) | |
1227 | { | |
1228 | ctx->app_gen_cookie_cb = cb; | |
1229 | } | |
7806f3dd NL |
1230 | |
1231 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
a230b26e EK |
1232 | int (*cb) (SSL *ssl, |
1233 | const unsigned char *cookie, | |
0f113f3e MC |
1234 | unsigned int cookie_len)) |
1235 | { | |
1236 | ctx->app_verify_cookie_cb = cb; | |
1237 | } | |
7806f3dd | 1238 | |
df0fed9a TS |
1239 | int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len) |
1240 | { | |
1241 | OPENSSL_free(ss->ticket_appdata); | |
1242 | ss->ticket_appdata_len = 0; | |
1243 | if (data == NULL || len == 0) { | |
1244 | ss->ticket_appdata = NULL; | |
1245 | return 1; | |
1246 | } | |
1247 | ss->ticket_appdata = OPENSSL_memdup(data, len); | |
1248 | if (ss->ticket_appdata != NULL) { | |
1249 | ss->ticket_appdata_len = len; | |
1250 | return 1; | |
1251 | } | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len) | |
1256 | { | |
1257 | *data = ss->ticket_appdata; | |
1258 | *len = ss->ticket_appdata_len; | |
1259 | return 1; | |
1260 | } | |
1261 | ||
3fa2812f BS |
1262 | void SSL_CTX_set_stateless_cookie_generate_cb( |
1263 | SSL_CTX *ctx, | |
1264 | int (*cb) (SSL *ssl, | |
1265 | unsigned char *cookie, | |
1266 | size_t *cookie_len)) | |
1267 | { | |
1268 | ctx->gen_stateless_cookie_cb = cb; | |
1269 | } | |
1270 | ||
1271 | void SSL_CTX_set_stateless_cookie_verify_cb( | |
1272 | SSL_CTX *ctx, | |
1273 | int (*cb) (SSL *ssl, | |
1274 | const unsigned char *cookie, | |
1275 | size_t cookie_len)) | |
1276 | { | |
1277 | ctx->verify_stateless_cookie_cb = cb; | |
1278 | } | |
1279 | ||
a230b26e | 1280 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION) |