]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * Copyright 2005 Nokia. All rights reserved. | |
4 | * | |
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 | |
9 | */ | |
10 | ||
11 | #include <stdio.h> | |
12 | #include <openssl/rand.h> | |
13 | #include <openssl/engine.h> | |
14 | #include "internal/refcount.h" | |
15 | #include "ssl_locl.h" | |
16 | #include "statem/statem_locl.h" | |
17 | ||
18 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); | |
19 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); | |
20 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); | |
21 | ||
22 | /* | |
23 | * SSL_get_session() and SSL_get1_session() are problematic in TLS1.3 because, | |
24 | * unlike in earlier protocol versions, the session ticket may not have been | |
25 | * sent yet even though a handshake has finished. The session ticket data could | |
26 | * come in sometime later...or even change if multiple session ticket messages | |
27 | * are sent from the server. The preferred way for applications to obtain | |
28 | * a resumable session is to use SSL_CTX_sess_set_new_cb(). | |
29 | */ | |
30 | ||
31 | SSL_SESSION *SSL_get_session(const SSL *ssl) | |
32 | /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ | |
33 | { | |
34 | return ssl->session; | |
35 | } | |
36 | ||
37 | SSL_SESSION *SSL_get1_session(SSL *ssl) | |
38 | /* variant of SSL_get_session: caller really gets something */ | |
39 | { | |
40 | SSL_SESSION *sess; | |
41 | /* | |
42 | * Need to lock this all up rather than just use CRYPTO_add so that | |
43 | * somebody doesn't free ssl->session between when we check it's non-null | |
44 | * and when we up the reference count. | |
45 | */ | |
46 | CRYPTO_THREAD_read_lock(ssl->lock); | |
47 | sess = ssl->session; | |
48 | if (sess) | |
49 | SSL_SESSION_up_ref(sess); | |
50 | CRYPTO_THREAD_unlock(ssl->lock); | |
51 | return sess; | |
52 | } | |
53 | ||
54 | int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) | |
55 | { | |
56 | return CRYPTO_set_ex_data(&s->ex_data, idx, arg); | |
57 | } | |
58 | ||
59 | void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) | |
60 | { | |
61 | return CRYPTO_get_ex_data(&s->ex_data, idx); | |
62 | } | |
63 | ||
64 | SSL_SESSION *SSL_SESSION_new(void) | |
65 | { | |
66 | SSL_SESSION *ss; | |
67 | ||
68 | if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) | |
69 | return NULL; | |
70 | ||
71 | ss = OPENSSL_zalloc(sizeof(*ss)); | |
72 | if (ss == NULL) { | |
73 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); | |
74 | return NULL; | |
75 | } | |
76 | ||
77 | ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ | |
78 | ss->references = 1; | |
79 | ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ | |
80 | ss->time = (unsigned long)time(NULL); | |
81 | ss->lock = CRYPTO_THREAD_lock_new(); | |
82 | if (ss->lock == NULL) { | |
83 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); | |
84 | OPENSSL_free(ss); | |
85 | return NULL; | |
86 | } | |
87 | ||
88 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) { | |
89 | CRYPTO_THREAD_lock_free(ss->lock); | |
90 | OPENSSL_free(ss); | |
91 | return NULL; | |
92 | } | |
93 | return ss; | |
94 | } | |
95 | ||
96 | SSL_SESSION *SSL_SESSION_dup(SSL_SESSION *src) | |
97 | { | |
98 | return ssl_session_dup(src, 1); | |
99 | } | |
100 | ||
101 | /* | |
102 | * Create a new SSL_SESSION and duplicate the contents of |src| into it. If | |
103 | * ticket == 0 then no ticket information is duplicated, otherwise it is. | |
104 | */ | |
105 | SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket) | |
106 | { | |
107 | SSL_SESSION *dest; | |
108 | ||
109 | dest = OPENSSL_malloc(sizeof(*src)); | |
110 | if (dest == NULL) { | |
111 | goto err; | |
112 | } | |
113 | memcpy(dest, src, sizeof(*dest)); | |
114 | ||
115 | /* | |
116 | * Set the various pointers to NULL so that we can call SSL_SESSION_free in | |
117 | * the case of an error whilst halfway through constructing dest | |
118 | */ | |
119 | #ifndef OPENSSL_NO_PSK | |
120 | dest->psk_identity_hint = NULL; | |
121 | dest->psk_identity = NULL; | |
122 | #endif | |
123 | dest->ciphers = NULL; | |
124 | dest->ext.hostname = NULL; | |
125 | #ifndef OPENSSL_NO_EC | |
126 | dest->ext.ecpointformats = NULL; | |
127 | dest->ext.supportedgroups = NULL; | |
128 | #endif | |
129 | dest->ext.tick = NULL; | |
130 | dest->ext.alpn_selected = NULL; | |
131 | #ifndef OPENSSL_NO_SRP | |
132 | dest->srp_username = NULL; | |
133 | #endif | |
134 | dest->peer_chain = NULL; | |
135 | dest->peer = NULL; | |
136 | dest->ext.tick_nonce = NULL; | |
137 | dest->ticket_appdata = NULL; | |
138 | memset(&dest->ex_data, 0, sizeof(dest->ex_data)); | |
139 | ||
140 | /* We deliberately don't copy the prev and next pointers */ | |
141 | dest->prev = NULL; | |
142 | dest->next = NULL; | |
143 | ||
144 | dest->references = 1; | |
145 | ||
146 | dest->lock = CRYPTO_THREAD_lock_new(); | |
147 | if (dest->lock == NULL) | |
148 | goto err; | |
149 | ||
150 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data)) | |
151 | goto err; | |
152 | ||
153 | if (src->peer != NULL) { | |
154 | if (!X509_up_ref(src->peer)) | |
155 | goto err; | |
156 | dest->peer = src->peer; | |
157 | } | |
158 | ||
159 | if (src->peer_chain != NULL) { | |
160 | dest->peer_chain = X509_chain_up_ref(src->peer_chain); | |
161 | if (dest->peer_chain == NULL) | |
162 | goto err; | |
163 | } | |
164 | #ifndef OPENSSL_NO_PSK | |
165 | if (src->psk_identity_hint) { | |
166 | dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint); | |
167 | if (dest->psk_identity_hint == NULL) { | |
168 | goto err; | |
169 | } | |
170 | } | |
171 | if (src->psk_identity) { | |
172 | dest->psk_identity = OPENSSL_strdup(src->psk_identity); | |
173 | if (dest->psk_identity == NULL) { | |
174 | goto err; | |
175 | } | |
176 | } | |
177 | #endif | |
178 | ||
179 | if (src->ciphers != NULL) { | |
180 | dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers); | |
181 | if (dest->ciphers == NULL) | |
182 | goto err; | |
183 | } | |
184 | ||
185 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, | |
186 | &dest->ex_data, &src->ex_data)) { | |
187 | goto err; | |
188 | } | |
189 | ||
190 | if (src->ext.hostname) { | |
191 | dest->ext.hostname = OPENSSL_strdup(src->ext.hostname); | |
192 | if (dest->ext.hostname == NULL) { | |
193 | goto err; | |
194 | } | |
195 | } | |
196 | #ifndef OPENSSL_NO_EC | |
197 | if (src->ext.ecpointformats) { | |
198 | dest->ext.ecpointformats = | |
199 | OPENSSL_memdup(src->ext.ecpointformats, | |
200 | src->ext.ecpointformats_len); | |
201 | if (dest->ext.ecpointformats == NULL) | |
202 | goto err; | |
203 | } | |
204 | if (src->ext.supportedgroups) { | |
205 | dest->ext.supportedgroups = | |
206 | OPENSSL_memdup(src->ext.supportedgroups, | |
207 | src->ext.supportedgroups_len); | |
208 | if (dest->ext.supportedgroups == NULL) | |
209 | goto err; | |
210 | } | |
211 | #endif | |
212 | ||
213 | if (ticket != 0 && src->ext.tick != NULL) { | |
214 | dest->ext.tick = | |
215 | OPENSSL_memdup(src->ext.tick, src->ext.ticklen); | |
216 | if (dest->ext.tick == NULL) | |
217 | goto err; | |
218 | } else { | |
219 | dest->ext.tick_lifetime_hint = 0; | |
220 | dest->ext.ticklen = 0; | |
221 | } | |
222 | ||
223 | if (src->ext.alpn_selected) { | |
224 | dest->ext.alpn_selected = | |
225 | (unsigned char*)OPENSSL_strndup((char*)src->ext.alpn_selected, | |
226 | src->ext.alpn_selected_len); | |
227 | if (dest->ext.alpn_selected == NULL) { | |
228 | goto err; | |
229 | } | |
230 | } | |
231 | ||
232 | if (src->ext.tick_nonce != NULL) { | |
233 | dest->ext.tick_nonce = OPENSSL_memdup(src->ext.tick_nonce, | |
234 | src->ext.tick_nonce_len); | |
235 | if (dest->ext.tick_nonce == NULL) | |
236 | goto err; | |
237 | } | |
238 | ||
239 | #ifndef OPENSSL_NO_SRP | |
240 | if (src->srp_username) { | |
241 | dest->srp_username = OPENSSL_strdup(src->srp_username); | |
242 | if (dest->srp_username == NULL) { | |
243 | goto err; | |
244 | } | |
245 | } | |
246 | #endif | |
247 | ||
248 | if (src->ticket_appdata != NULL) { | |
249 | dest->ticket_appdata = | |
250 | OPENSSL_memdup(src->ticket_appdata, src->ticket_appdata_len); | |
251 | if (dest->ticket_appdata == NULL) | |
252 | goto err; | |
253 | } | |
254 | ||
255 | return dest; | |
256 | err: | |
257 | SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); | |
258 | SSL_SESSION_free(dest); | |
259 | return NULL; | |
260 | } | |
261 | ||
262 | const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) | |
263 | { | |
264 | if (len) | |
265 | *len = (unsigned int)s->session_id_length; | |
266 | return s->session_id; | |
267 | } | |
268 | const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s, | |
269 | unsigned int *len) | |
270 | { | |
271 | if (len != NULL) | |
272 | *len = (unsigned int)s->sid_ctx_length; | |
273 | return s->sid_ctx; | |
274 | } | |
275 | ||
276 | unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) | |
277 | { | |
278 | return s->compress_meth; | |
279 | } | |
280 | ||
281 | /* | |
282 | * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling | |
283 | * the ID with random junk repeatedly until we have no conflict is going to | |
284 | * complete in one iteration pretty much "most" of the time (btw: | |
285 | * understatement). So, if it takes us 10 iterations and we still can't avoid | |
286 | * a conflict - well that's a reasonable point to call it quits. Either the | |
287 | * RAND code is broken or someone is trying to open roughly very close to | |
288 | * 2^256 SSL sessions to our server. How you might store that many sessions | |
289 | * is perhaps a more interesting question ... | |
290 | */ | |
291 | ||
292 | #define MAX_SESS_ID_ATTEMPTS 10 | |
293 | static int def_generate_session_id(SSL *ssl, unsigned char *id, | |
294 | unsigned int *id_len) | |
295 | { | |
296 | unsigned int retry = 0; | |
297 | do | |
298 | if (ssl_randbytes(ssl, id, *id_len) <= 0) | |
299 | return 0; | |
300 | while (SSL_has_matching_session_id(ssl, id, *id_len) && | |
301 | (++retry < MAX_SESS_ID_ATTEMPTS)) ; | |
302 | if (retry < MAX_SESS_ID_ATTEMPTS) | |
303 | return 1; | |
304 | /* else - woops a session_id match */ | |
305 | /* | |
306 | * XXX We should also check the external cache -- but the probability of | |
307 | * a collision is negligible, and we could not prevent the concurrent | |
308 | * creation of sessions with identical IDs since we currently don't have | |
309 | * means to atomically check whether a session ID already exists and make | |
310 | * a reservation for it if it does not (this problem applies to the | |
311 | * internal cache as well). | |
312 | */ | |
313 | return 0; | |
314 | } | |
315 | ||
316 | int ssl_generate_session_id(SSL *s, SSL_SESSION *ss) | |
317 | { | |
318 | unsigned int tmp; | |
319 | GEN_SESSION_CB cb = def_generate_session_id; | |
320 | ||
321 | switch (s->version) { | |
322 | case SSL3_VERSION: | |
323 | case TLS1_VERSION: | |
324 | case TLS1_1_VERSION: | |
325 | case TLS1_2_VERSION: | |
326 | case TLS1_3_VERSION: | |
327 | case DTLS1_BAD_VER: | |
328 | case DTLS1_VERSION: | |
329 | case DTLS1_2_VERSION: | |
330 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
331 | break; | |
332 | default: | |
333 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, | |
334 | SSL_R_UNSUPPORTED_SSL_VERSION); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | /*- | |
339 | * If RFC5077 ticket, use empty session ID (as server). | |
340 | * Note that: | |
341 | * (a) ssl_get_prev_session() does lookahead into the | |
342 | * ClientHello extensions to find the session ticket. | |
343 | * When ssl_get_prev_session() fails, statem_srvr.c calls | |
344 | * ssl_get_new_session() in tls_process_client_hello(). | |
345 | * At that point, it has not yet parsed the extensions, | |
346 | * however, because of the lookahead, it already knows | |
347 | * whether a ticket is expected or not. | |
348 | * | |
349 | * (b) statem_clnt.c calls ssl_get_new_session() before parsing | |
350 | * ServerHello extensions, and before recording the session | |
351 | * ID received from the server, so this block is a noop. | |
352 | */ | |
353 | if (s->ext.ticket_expected) { | |
354 | ss->session_id_length = 0; | |
355 | return 1; | |
356 | } | |
357 | ||
358 | /* Choose which callback will set the session ID */ | |
359 | CRYPTO_THREAD_read_lock(s->lock); | |
360 | CRYPTO_THREAD_read_lock(s->session_ctx->lock); | |
361 | if (s->generate_session_id) | |
362 | cb = s->generate_session_id; | |
363 | else if (s->session_ctx->generate_session_id) | |
364 | cb = s->session_ctx->generate_session_id; | |
365 | CRYPTO_THREAD_unlock(s->session_ctx->lock); | |
366 | CRYPTO_THREAD_unlock(s->lock); | |
367 | /* Choose a session ID */ | |
368 | memset(ss->session_id, 0, ss->session_id_length); | |
369 | tmp = (int)ss->session_id_length; | |
370 | if (!cb(s, ss->session_id, &tmp)) { | |
371 | /* The callback failed */ | |
372 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, | |
373 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); | |
374 | return 0; | |
375 | } | |
376 | /* | |
377 | * Don't allow the callback to set the session length to zero. nor | |
378 | * set it higher than it was. | |
379 | */ | |
380 | if (tmp == 0 || tmp > ss->session_id_length) { | |
381 | /* The callback set an illegal length */ | |
382 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, | |
383 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); | |
384 | return 0; | |
385 | } | |
386 | ss->session_id_length = tmp; | |
387 | /* Finally, check for a conflict */ | |
388 | if (SSL_has_matching_session_id(s, ss->session_id, | |
389 | (unsigned int)ss->session_id_length)) { | |
390 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GENERATE_SESSION_ID, | |
391 | SSL_R_SSL_SESSION_ID_CONFLICT); | |
392 | return 0; | |
393 | } | |
394 | ||
395 | return 1; | |
396 | } | |
397 | ||
398 | int ssl_get_new_session(SSL *s, int session) | |
399 | { | |
400 | /* This gets used by clients and servers. */ | |
401 | ||
402 | SSL_SESSION *ss = NULL; | |
403 | ||
404 | if ((ss = SSL_SESSION_new()) == NULL) { | |
405 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_NEW_SESSION, | |
406 | ERR_R_MALLOC_FAILURE); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | /* If the context has a default timeout, use it */ | |
411 | if (s->session_ctx->session_timeout == 0) | |
412 | ss->timeout = SSL_get_default_timeout(s); | |
413 | else | |
414 | ss->timeout = s->session_ctx->session_timeout; | |
415 | ||
416 | SSL_SESSION_free(s->session); | |
417 | s->session = NULL; | |
418 | ||
419 | if (session) { | |
420 | if (!ssl_generate_session_id(s, ss)) { | |
421 | /* SSLfatal() already called */ | |
422 | SSL_SESSION_free(ss); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | if (s->ext.hostname) { | |
427 | ss->ext.hostname = OPENSSL_strdup(s->ext.hostname); | |
428 | if (ss->ext.hostname == NULL) { | |
429 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_NEW_SESSION, | |
430 | ERR_R_INTERNAL_ERROR); | |
431 | SSL_SESSION_free(ss); | |
432 | return 0; | |
433 | } | |
434 | } | |
435 | } else { | |
436 | ss->session_id_length = 0; | |
437 | } | |
438 | ||
439 | if (s->sid_ctx_length > sizeof(ss->sid_ctx)) { | |
440 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_NEW_SESSION, | |
441 | ERR_R_INTERNAL_ERROR); | |
442 | SSL_SESSION_free(ss); | |
443 | return 0; | |
444 | } | |
445 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
446 | ss->sid_ctx_length = s->sid_ctx_length; | |
447 | s->session = ss; | |
448 | ss->ssl_version = s->version; | |
449 | ss->verify_result = X509_V_OK; | |
450 | ||
451 | /* If client supports extended master secret set it in session */ | |
452 | if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) | |
453 | ss->flags |= SSL_SESS_FLAG_EXTMS; | |
454 | ||
455 | return 1; | |
456 | } | |
457 | ||
458 | /*- | |
459 | * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this | |
460 | * connection. It is only called by servers. | |
461 | * | |
462 | * hello: The parsed ClientHello data | |
463 | * | |
464 | * Returns: | |
465 | * -1: fatal error | |
466 | * 0: no session found | |
467 | * 1: a session may have been found. | |
468 | * | |
469 | * Side effects: | |
470 | * - If a session is found then s->session is pointed at it (after freeing an | |
471 | * existing session if need be) and s->verify_result is set from the session. | |
472 | * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1 | |
473 | * if the server should issue a new session ticket (to 0 otherwise). | |
474 | */ | |
475 | int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello) | |
476 | { | |
477 | /* This is used only by servers. */ | |
478 | ||
479 | SSL_SESSION *ret = NULL; | |
480 | int fatal = 0, discard; | |
481 | int try_session_cache = 0; | |
482 | SSL_TICKET_RETURN r; | |
483 | ||
484 | if (SSL_IS_TLS13(s)) { | |
485 | if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, | |
486 | SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, | |
487 | NULL, 0) | |
488 | || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO, | |
489 | hello->pre_proc_exts, NULL, 0)) | |
490 | return -1; | |
491 | ||
492 | ret = s->session; | |
493 | } else { | |
494 | /* sets s->ext.ticket_expected */ | |
495 | r = tls_get_ticket_from_client(s, hello, &ret); | |
496 | switch (r) { | |
497 | case SSL_TICKET_FATAL_ERR_MALLOC: | |
498 | case SSL_TICKET_FATAL_ERR_OTHER: | |
499 | fatal = 1; | |
500 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_PREV_SESSION, | |
501 | ERR_R_INTERNAL_ERROR); | |
502 | goto err; | |
503 | case SSL_TICKET_NONE: | |
504 | case SSL_TICKET_EMPTY: | |
505 | if (hello->session_id_len > 0) | |
506 | try_session_cache = 1; | |
507 | break; | |
508 | case SSL_TICKET_NO_DECRYPT: | |
509 | case SSL_TICKET_SUCCESS: | |
510 | case SSL_TICKET_SUCCESS_RENEW: | |
511 | break; | |
512 | } | |
513 | } | |
514 | ||
515 | if (try_session_cache && | |
516 | ret == NULL && | |
517 | !(s->session_ctx->session_cache_mode & | |
518 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { | |
519 | SSL_SESSION data; | |
520 | ||
521 | data.ssl_version = s->version; | |
522 | memcpy(data.session_id, hello->session_id, hello->session_id_len); | |
523 | data.session_id_length = hello->session_id_len; | |
524 | ||
525 | CRYPTO_THREAD_read_lock(s->session_ctx->lock); | |
526 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); | |
527 | if (ret != NULL) { | |
528 | /* don't allow other threads to steal it: */ | |
529 | SSL_SESSION_up_ref(ret); | |
530 | } | |
531 | CRYPTO_THREAD_unlock(s->session_ctx->lock); | |
532 | if (ret == NULL) | |
533 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_miss, 1, &discard, | |
534 | s->session_ctx->lock); | |
535 | } | |
536 | ||
537 | if (try_session_cache && | |
538 | ret == NULL && s->session_ctx->get_session_cb != NULL) { | |
539 | int copy = 1; | |
540 | ||
541 | ret = s->session_ctx->get_session_cb(s, hello->session_id, | |
542 | hello->session_id_len, | |
543 | ©); | |
544 | ||
545 | if (ret != NULL) { | |
546 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_cb_hit, 1, &discard, | |
547 | s->session_ctx->lock); | |
548 | ||
549 | /* | |
550 | * Increment reference count now if the session callback asks us | |
551 | * to do so (note that if the session structures returned by the | |
552 | * callback are shared between threads, it must handle the | |
553 | * reference count itself [i.e. copy == 0], or things won't be | |
554 | * thread-safe). | |
555 | */ | |
556 | if (copy) | |
557 | SSL_SESSION_up_ref(ret); | |
558 | ||
559 | /* | |
560 | * Add the externally cached session to the internal cache as | |
561 | * well if and only if we are supposed to. | |
562 | */ | |
563 | if (! | |
564 | (s->session_ctx->session_cache_mode & | |
565 | SSL_SESS_CACHE_NO_INTERNAL_STORE)) { | |
566 | /* | |
567 | * Either return value of SSL_CTX_add_session should not | |
568 | * interrupt the session resumption process. The return | |
569 | * value is intentionally ignored. | |
570 | */ | |
571 | SSL_CTX_add_session(s->session_ctx, ret); | |
572 | } | |
573 | } | |
574 | } | |
575 | ||
576 | if (ret == NULL) | |
577 | goto err; | |
578 | ||
579 | /* Now ret is non-NULL and we own one of its reference counts. */ | |
580 | ||
581 | /* Check TLS version consistency */ | |
582 | if (ret->ssl_version != s->version) | |
583 | goto err; | |
584 | ||
585 | if (ret->sid_ctx_length != s->sid_ctx_length | |
586 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { | |
587 | /* | |
588 | * We have the session requested by the client, but we don't want to | |
589 | * use it in this context. | |
590 | */ | |
591 | goto err; /* treat like cache miss */ | |
592 | } | |
593 | ||
594 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { | |
595 | /* | |
596 | * We can't be sure if this session is being used out of context, | |
597 | * which is especially important for SSL_VERIFY_PEER. The application | |
598 | * should have used SSL[_CTX]_set_session_id_context. For this error | |
599 | * case, we generate an error instead of treating the event like a | |
600 | * cache miss (otherwise it would be easy for applications to | |
601 | * effectively disable the session cache by accident without anyone | |
602 | * noticing). | |
603 | */ | |
604 | ||
605 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_GET_PREV_SESSION, | |
606 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); | |
607 | fatal = 1; | |
608 | goto err; | |
609 | } | |
610 | ||
611 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ | |
612 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_timeout, 1, &discard, | |
613 | s->session_ctx->lock); | |
614 | if (try_session_cache) { | |
615 | /* session was from the cache, so remove it */ | |
616 | SSL_CTX_remove_session(s->session_ctx, ret); | |
617 | } | |
618 | goto err; | |
619 | } | |
620 | ||
621 | /* Check extended master secret extension consistency */ | |
622 | if (ret->flags & SSL_SESS_FLAG_EXTMS) { | |
623 | /* If old session includes extms, but new does not: abort handshake */ | |
624 | if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS)) { | |
625 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_GET_PREV_SESSION, | |
626 | SSL_R_INCONSISTENT_EXTMS); | |
627 | fatal = 1; | |
628 | goto err; | |
629 | } | |
630 | } else if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) { | |
631 | /* If new session includes extms, but old does not: do not resume */ | |
632 | goto err; | |
633 | } | |
634 | ||
635 | if (!SSL_IS_TLS13(s)) { | |
636 | /* We already did this for TLS1.3 */ | |
637 | SSL_SESSION_free(s->session); | |
638 | s->session = ret; | |
639 | } | |
640 | ||
641 | CRYPTO_atomic_add(&s->session_ctx->stats.sess_hit, 1, &discard, | |
642 | s->session_ctx->lock); | |
643 | s->verify_result = s->session->verify_result; | |
644 | return 1; | |
645 | ||
646 | err: | |
647 | if (ret != NULL) { | |
648 | SSL_SESSION_free(ret); | |
649 | /* In TLSv1.3 s->session was already set to ret, so we NULL it out */ | |
650 | if (SSL_IS_TLS13(s)) | |
651 | s->session = NULL; | |
652 | ||
653 | if (!try_session_cache) { | |
654 | /* | |
655 | * The session was from a ticket, so we should issue a ticket for | |
656 | * the new session | |
657 | */ | |
658 | s->ext.ticket_expected = 1; | |
659 | } | |
660 | } | |
661 | if (fatal) | |
662 | return -1; | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
667 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) | |
668 | { | |
669 | int ret = 0, discard; | |
670 | SSL_SESSION *s; | |
671 | ||
672 | /* | |
673 | * add just 1 reference count for the SSL_CTX's session cache even though | |
674 | * it has two ways of access: each session is in a doubly linked list and | |
675 | * an lhash | |
676 | */ | |
677 | SSL_SESSION_up_ref(c); | |
678 | /* | |
679 | * if session c is in already in cache, we take back the increment later | |
680 | */ | |
681 | ||
682 | CRYPTO_THREAD_write_lock(ctx->lock); | |
683 | s = lh_SSL_SESSION_insert(ctx->sessions, c); | |
684 | ||
685 | /* | |
686 | * s != NULL iff we already had a session with the given PID. In this | |
687 | * case, s == c should hold (then we did not really modify | |
688 | * ctx->sessions), or we're in trouble. | |
689 | */ | |
690 | if (s != NULL && s != c) { | |
691 | /* We *are* in trouble ... */ | |
692 | SSL_SESSION_list_remove(ctx, s); | |
693 | SSL_SESSION_free(s); | |
694 | /* | |
695 | * ... so pretend the other session did not exist in cache (we cannot | |
696 | * handle two SSL_SESSION structures with identical session ID in the | |
697 | * same cache, which could happen e.g. when two threads concurrently | |
698 | * obtain the same session from an external cache) | |
699 | */ | |
700 | s = NULL; | |
701 | } else if (s == NULL && | |
702 | lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { | |
703 | /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ | |
704 | ||
705 | /* | |
706 | * ... so take back the extra reference and also don't add | |
707 | * the session to the SSL_SESSION_list at this time | |
708 | */ | |
709 | s = c; | |
710 | } | |
711 | ||
712 | /* Put at the head of the queue unless it is already in the cache */ | |
713 | if (s == NULL) | |
714 | SSL_SESSION_list_add(ctx, c); | |
715 | ||
716 | if (s != NULL) { | |
717 | /* | |
718 | * existing cache entry -- decrement previously incremented reference | |
719 | * count because it already takes into account the cache | |
720 | */ | |
721 | ||
722 | SSL_SESSION_free(s); /* s == c */ | |
723 | ret = 0; | |
724 | } else { | |
725 | /* | |
726 | * new cache entry -- remove old ones if cache has become too large | |
727 | */ | |
728 | ||
729 | ret = 1; | |
730 | ||
731 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
732 | while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) { | |
733 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) | |
734 | break; | |
735 | else | |
736 | CRYPTO_atomic_add(&ctx->stats.sess_cache_full, 1, &discard, | |
737 | ctx->lock); | |
738 | } | |
739 | } | |
740 | } | |
741 | CRYPTO_THREAD_unlock(ctx->lock); | |
742 | return ret; | |
743 | } | |
744 | ||
745 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) | |
746 | { | |
747 | return remove_session_lock(ctx, c, 1); | |
748 | } | |
749 | ||
750 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) | |
751 | { | |
752 | SSL_SESSION *r; | |
753 | int ret = 0; | |
754 | ||
755 | if ((c != NULL) && (c->session_id_length != 0)) { | |
756 | if (lck) | |
757 | CRYPTO_THREAD_write_lock(ctx->lock); | |
758 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { | |
759 | ret = 1; | |
760 | r = lh_SSL_SESSION_delete(ctx->sessions, c); | |
761 | SSL_SESSION_list_remove(ctx, c); | |
762 | } | |
763 | c->not_resumable = 1; | |
764 | ||
765 | if (lck) | |
766 | CRYPTO_THREAD_unlock(ctx->lock); | |
767 | ||
768 | if (ret) | |
769 | SSL_SESSION_free(r); | |
770 | ||
771 | if (ctx->remove_session_cb != NULL) | |
772 | ctx->remove_session_cb(ctx, c); | |
773 | } else | |
774 | ret = 0; | |
775 | return ret; | |
776 | } | |
777 | ||
778 | void SSL_SESSION_free(SSL_SESSION *ss) | |
779 | { | |
780 | int i; | |
781 | ||
782 | if (ss == NULL) | |
783 | return; | |
784 | ||
785 | CRYPTO_DOWN_REF(&ss->references, &i, ss->lock); | |
786 | REF_PRINT_COUNT("SSL_SESSION", ss); | |
787 | if (i > 0) | |
788 | return; | |
789 | REF_ASSERT_ISNT(i < 0); | |
790 | ||
791 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); | |
792 | ||
793 | OPENSSL_cleanse(ss->master_key, sizeof(ss->master_key)); | |
794 | OPENSSL_cleanse(ss->session_id, sizeof(ss->session_id)); | |
795 | X509_free(ss->peer); | |
796 | sk_X509_pop_free(ss->peer_chain, X509_free); | |
797 | sk_SSL_CIPHER_free(ss->ciphers); | |
798 | OPENSSL_free(ss->ext.hostname); | |
799 | OPENSSL_free(ss->ext.tick); | |
800 | #ifndef OPENSSL_NO_EC | |
801 | OPENSSL_free(ss->ext.ecpointformats); | |
802 | ss->ext.ecpointformats = NULL; | |
803 | ss->ext.ecpointformats_len = 0; | |
804 | OPENSSL_free(ss->ext.supportedgroups); | |
805 | ss->ext.supportedgroups = NULL; | |
806 | ss->ext.supportedgroups_len = 0; | |
807 | #endif /* OPENSSL_NO_EC */ | |
808 | #ifndef OPENSSL_NO_PSK | |
809 | OPENSSL_free(ss->psk_identity_hint); | |
810 | OPENSSL_free(ss->psk_identity); | |
811 | #endif | |
812 | #ifndef OPENSSL_NO_SRP | |
813 | OPENSSL_free(ss->srp_username); | |
814 | #endif | |
815 | OPENSSL_free(ss->ext.alpn_selected); | |
816 | OPENSSL_free(ss->ext.tick_nonce); | |
817 | OPENSSL_free(ss->ticket_appdata); | |
818 | CRYPTO_THREAD_lock_free(ss->lock); | |
819 | OPENSSL_clear_free(ss, sizeof(*ss)); | |
820 | } | |
821 | ||
822 | int SSL_SESSION_up_ref(SSL_SESSION *ss) | |
823 | { | |
824 | int i; | |
825 | ||
826 | if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0) | |
827 | return 0; | |
828 | ||
829 | REF_PRINT_COUNT("SSL_SESSION", ss); | |
830 | REF_ASSERT_ISNT(i < 2); | |
831 | return ((i > 1) ? 1 : 0); | |
832 | } | |
833 | ||
834 | int SSL_set_session(SSL *s, SSL_SESSION *session) | |
835 | { | |
836 | ssl_clear_bad_session(s); | |
837 | if (s->ctx->method != s->method) { | |
838 | if (!SSL_set_ssl_method(s, s->ctx->method)) | |
839 | return 0; | |
840 | } | |
841 | ||
842 | if (session != NULL) { | |
843 | SSL_SESSION_up_ref(session); | |
844 | s->verify_result = session->verify_result; | |
845 | } | |
846 | SSL_SESSION_free(s->session); | |
847 | s->session = session; | |
848 | ||
849 | return 1; | |
850 | } | |
851 | ||
852 | int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, | |
853 | unsigned int sid_len) | |
854 | { | |
855 | if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { | |
856 | SSLerr(SSL_F_SSL_SESSION_SET1_ID, | |
857 | SSL_R_SSL_SESSION_ID_TOO_LONG); | |
858 | return 0; | |
859 | } | |
860 | s->session_id_length = sid_len; | |
861 | if (sid != s->session_id) | |
862 | memcpy(s->session_id, sid, sid_len); | |
863 | return 1; | |
864 | } | |
865 | ||
866 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) | |
867 | { | |
868 | if (s == NULL) | |
869 | return 0; | |
870 | s->timeout = t; | |
871 | return 1; | |
872 | } | |
873 | ||
874 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) | |
875 | { | |
876 | if (s == NULL) | |
877 | return 0; | |
878 | return s->timeout; | |
879 | } | |
880 | ||
881 | long SSL_SESSION_get_time(const SSL_SESSION *s) | |
882 | { | |
883 | if (s == NULL) | |
884 | return 0; | |
885 | return s->time; | |
886 | } | |
887 | ||
888 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) | |
889 | { | |
890 | if (s == NULL) | |
891 | return 0; | |
892 | s->time = t; | |
893 | return t; | |
894 | } | |
895 | ||
896 | int SSL_SESSION_get_protocol_version(const SSL_SESSION *s) | |
897 | { | |
898 | return s->ssl_version; | |
899 | } | |
900 | ||
901 | int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version) | |
902 | { | |
903 | s->ssl_version = version; | |
904 | return 1; | |
905 | } | |
906 | ||
907 | const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s) | |
908 | { | |
909 | return s->cipher; | |
910 | } | |
911 | ||
912 | int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher) | |
913 | { | |
914 | s->cipher = cipher; | |
915 | return 1; | |
916 | } | |
917 | ||
918 | const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s) | |
919 | { | |
920 | return s->ext.hostname; | |
921 | } | |
922 | ||
923 | int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname) | |
924 | { | |
925 | OPENSSL_free(s->ext.hostname); | |
926 | if (hostname == NULL) { | |
927 | s->ext.hostname = NULL; | |
928 | return 1; | |
929 | } | |
930 | s->ext.hostname = OPENSSL_strdup(hostname); | |
931 | ||
932 | return s->ext.hostname != NULL; | |
933 | } | |
934 | ||
935 | int SSL_SESSION_has_ticket(const SSL_SESSION *s) | |
936 | { | |
937 | return (s->ext.ticklen > 0) ? 1 : 0; | |
938 | } | |
939 | ||
940 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) | |
941 | { | |
942 | return s->ext.tick_lifetime_hint; | |
943 | } | |
944 | ||
945 | void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick, | |
946 | size_t *len) | |
947 | { | |
948 | *len = s->ext.ticklen; | |
949 | if (tick != NULL) | |
950 | *tick = s->ext.tick; | |
951 | } | |
952 | ||
953 | uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s) | |
954 | { | |
955 | return s->ext.max_early_data; | |
956 | } | |
957 | ||
958 | int SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data) | |
959 | { | |
960 | s->ext.max_early_data = max_early_data; | |
961 | ||
962 | return 1; | |
963 | } | |
964 | ||
965 | void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s, | |
966 | const unsigned char **alpn, | |
967 | size_t *len) | |
968 | { | |
969 | *alpn = s->ext.alpn_selected; | |
970 | *len = s->ext.alpn_selected_len; | |
971 | } | |
972 | ||
973 | int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn, | |
974 | size_t len) | |
975 | { | |
976 | OPENSSL_free(s->ext.alpn_selected); | |
977 | if (alpn == NULL || len == 0) { | |
978 | s->ext.alpn_selected = NULL; | |
979 | s->ext.alpn_selected_len = 0; | |
980 | return 1; | |
981 | } | |
982 | s->ext.alpn_selected = OPENSSL_memdup(alpn, len); | |
983 | if (s->ext.alpn_selected == NULL) { | |
984 | s->ext.alpn_selected_len = 0; | |
985 | return 0; | |
986 | } | |
987 | s->ext.alpn_selected_len = len; | |
988 | ||
989 | return 1; | |
990 | } | |
991 | ||
992 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) | |
993 | { | |
994 | return s->peer; | |
995 | } | |
996 | ||
997 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, | |
998 | unsigned int sid_ctx_len) | |
999 | { | |
1000 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
1001 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, | |
1002 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
1003 | return 0; | |
1004 | } | |
1005 | s->sid_ctx_length = sid_ctx_len; | |
1006 | if (sid_ctx != s->sid_ctx) | |
1007 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); | |
1008 | ||
1009 | return 1; | |
1010 | } | |
1011 | ||
1012 | int SSL_SESSION_is_resumable(const SSL_SESSION *s) | |
1013 | { | |
1014 | /* | |
1015 | * In the case of EAP-FAST, we can have a pre-shared "ticket" without a | |
1016 | * session ID. | |
1017 | */ | |
1018 | return !s->not_resumable | |
1019 | && (s->session_id_length > 0 || s->ext.ticklen > 0); | |
1020 | } | |
1021 | ||
1022 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) | |
1023 | { | |
1024 | long l; | |
1025 | if (s == NULL) | |
1026 | return 0; | |
1027 | l = s->session_timeout; | |
1028 | s->session_timeout = t; | |
1029 | return l; | |
1030 | } | |
1031 | ||
1032 | long SSL_CTX_get_timeout(const SSL_CTX *s) | |
1033 | { | |
1034 | if (s == NULL) | |
1035 | return 0; | |
1036 | return s->session_timeout; | |
1037 | } | |
1038 | ||
1039 | int SSL_set_session_secret_cb(SSL *s, | |
1040 | tls_session_secret_cb_fn tls_session_secret_cb, | |
1041 | void *arg) | |
1042 | { | |
1043 | if (s == NULL) | |
1044 | return 0; | |
1045 | s->ext.session_secret_cb = tls_session_secret_cb; | |
1046 | s->ext.session_secret_cb_arg = arg; | |
1047 | return 1; | |
1048 | } | |
1049 | ||
1050 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, | |
1051 | void *arg) | |
1052 | { | |
1053 | if (s == NULL) | |
1054 | return 0; | |
1055 | s->ext.session_ticket_cb = cb; | |
1056 | s->ext.session_ticket_cb_arg = arg; | |
1057 | return 1; | |
1058 | } | |
1059 | ||
1060 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) | |
1061 | { | |
1062 | if (s->version >= TLS1_VERSION) { | |
1063 | OPENSSL_free(s->ext.session_ticket); | |
1064 | s->ext.session_ticket = NULL; | |
1065 | s->ext.session_ticket = | |
1066 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); | |
1067 | if (s->ext.session_ticket == NULL) { | |
1068 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | if (ext_data != NULL) { | |
1073 | s->ext.session_ticket->length = ext_len; | |
1074 | s->ext.session_ticket->data = s->ext.session_ticket + 1; | |
1075 | memcpy(s->ext.session_ticket->data, ext_data, ext_len); | |
1076 | } else { | |
1077 | s->ext.session_ticket->length = 0; | |
1078 | s->ext.session_ticket->data = NULL; | |
1079 | } | |
1080 | ||
1081 | return 1; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | typedef struct timeout_param_st { | |
1088 | SSL_CTX *ctx; | |
1089 | long time; | |
1090 | LHASH_OF(SSL_SESSION) *cache; | |
1091 | } TIMEOUT_PARAM; | |
1092 | ||
1093 | static void timeout_cb(SSL_SESSION *s, TIMEOUT_PARAM *p) | |
1094 | { | |
1095 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
1096 | /* | |
1097 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
1098 | * locking overhead | |
1099 | */ | |
1100 | (void)lh_SSL_SESSION_delete(p->cache, s); | |
1101 | SSL_SESSION_list_remove(p->ctx, s); | |
1102 | s->not_resumable = 1; | |
1103 | if (p->ctx->remove_session_cb != NULL) | |
1104 | p->ctx->remove_session_cb(p->ctx, s); | |
1105 | SSL_SESSION_free(s); | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | IMPLEMENT_LHASH_DOALL_ARG(SSL_SESSION, TIMEOUT_PARAM); | |
1110 | ||
1111 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) | |
1112 | { | |
1113 | unsigned long i; | |
1114 | TIMEOUT_PARAM tp; | |
1115 | ||
1116 | tp.ctx = s; | |
1117 | tp.cache = s->sessions; | |
1118 | if (tp.cache == NULL) | |
1119 | return; | |
1120 | tp.time = t; | |
1121 | CRYPTO_THREAD_write_lock(s->lock); | |
1122 | i = lh_SSL_SESSION_get_down_load(s->sessions); | |
1123 | lh_SSL_SESSION_set_down_load(s->sessions, 0); | |
1124 | lh_SSL_SESSION_doall_TIMEOUT_PARAM(tp.cache, timeout_cb, &tp); | |
1125 | lh_SSL_SESSION_set_down_load(s->sessions, i); | |
1126 | CRYPTO_THREAD_unlock(s->lock); | |
1127 | } | |
1128 | ||
1129 | int ssl_clear_bad_session(SSL *s) | |
1130 | { | |
1131 | if ((s->session != NULL) && | |
1132 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
1133 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
1134 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
1135 | return 1; | |
1136 | } else | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | /* locked by SSL_CTX in the calling function */ | |
1141 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) | |
1142 | { | |
1143 | if ((s->next == NULL) || (s->prev == NULL)) | |
1144 | return; | |
1145 | ||
1146 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
1147 | /* last element in list */ | |
1148 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1149 | /* only one element in list */ | |
1150 | ctx->session_cache_head = NULL; | |
1151 | ctx->session_cache_tail = NULL; | |
1152 | } else { | |
1153 | ctx->session_cache_tail = s->prev; | |
1154 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1155 | } | |
1156 | } else { | |
1157 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1158 | /* first element in list */ | |
1159 | ctx->session_cache_head = s->next; | |
1160 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1161 | } else { | |
1162 | /* middle of list */ | |
1163 | s->next->prev = s->prev; | |
1164 | s->prev->next = s->next; | |
1165 | } | |
1166 | } | |
1167 | s->prev = s->next = NULL; | |
1168 | } | |
1169 | ||
1170 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) | |
1171 | { | |
1172 | if ((s->next != NULL) && (s->prev != NULL)) | |
1173 | SSL_SESSION_list_remove(ctx, s); | |
1174 | ||
1175 | if (ctx->session_cache_head == NULL) { | |
1176 | ctx->session_cache_head = s; | |
1177 | ctx->session_cache_tail = s; | |
1178 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1179 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1180 | } else { | |
1181 | s->next = ctx->session_cache_head; | |
1182 | s->next->prev = s; | |
1183 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1184 | ctx->session_cache_head = s; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, | |
1189 | int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess)) | |
1190 | { | |
1191 | ctx->new_session_cb = cb; | |
1192 | } | |
1193 | ||
1194 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { | |
1195 | return ctx->new_session_cb; | |
1196 | } | |
1197 | ||
1198 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
1199 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) | |
1200 | { | |
1201 | ctx->remove_session_cb = cb; | |
1202 | } | |
1203 | ||
1204 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, | |
1205 | SSL_SESSION *sess) { | |
1206 | return ctx->remove_session_cb; | |
1207 | } | |
1208 | ||
1209 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
1210 | SSL_SESSION *(*cb) (struct ssl_st *ssl, | |
1211 | const unsigned char *data, | |
1212 | int len, int *copy)) | |
1213 | { | |
1214 | ctx->get_session_cb = cb; | |
1215 | } | |
1216 | ||
1217 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
1218 | const unsigned char | |
1219 | *data, int len, | |
1220 | int *copy) { | |
1221 | return ctx->get_session_cb; | |
1222 | } | |
1223 | ||
1224 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
1225 | void (*cb) (const SSL *ssl, int type, int val)) | |
1226 | { | |
1227 | ctx->info_callback = cb; | |
1228 | } | |
1229 | ||
1230 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
1231 | int val) { | |
1232 | return ctx->info_callback; | |
1233 | } | |
1234 | ||
1235 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
1236 | int (*cb) (SSL *ssl, X509 **x509, | |
1237 | EVP_PKEY **pkey)) | |
1238 | { | |
1239 | ctx->client_cert_cb = cb; | |
1240 | } | |
1241 | ||
1242 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, | |
1243 | EVP_PKEY **pkey) { | |
1244 | return ctx->client_cert_cb; | |
1245 | } | |
1246 | ||
1247 | #ifndef OPENSSL_NO_ENGINE | |
1248 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
1249 | { | |
1250 | if (!ENGINE_init(e)) { | |
1251 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
1252 | return 0; | |
1253 | } | |
1254 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
1255 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
1256 | SSL_R_NO_CLIENT_CERT_METHOD); | |
1257 | ENGINE_finish(e); | |
1258 | return 0; | |
1259 | } | |
1260 | ctx->client_cert_engine = e; | |
1261 | return 1; | |
1262 | } | |
1263 | #endif | |
1264 | ||
1265 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, | |
1266 | int (*cb) (SSL *ssl, | |
1267 | unsigned char *cookie, | |
1268 | unsigned int *cookie_len)) | |
1269 | { | |
1270 | ctx->app_gen_cookie_cb = cb; | |
1271 | } | |
1272 | ||
1273 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
1274 | int (*cb) (SSL *ssl, | |
1275 | const unsigned char *cookie, | |
1276 | unsigned int cookie_len)) | |
1277 | { | |
1278 | ctx->app_verify_cookie_cb = cb; | |
1279 | } | |
1280 | ||
1281 | int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len) | |
1282 | { | |
1283 | OPENSSL_free(ss->ticket_appdata); | |
1284 | ss->ticket_appdata_len = 0; | |
1285 | if (data == NULL || len == 0) { | |
1286 | ss->ticket_appdata = NULL; | |
1287 | return 1; | |
1288 | } | |
1289 | ss->ticket_appdata = OPENSSL_memdup(data, len); | |
1290 | if (ss->ticket_appdata != NULL) { | |
1291 | ss->ticket_appdata_len = len; | |
1292 | return 1; | |
1293 | } | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len) | |
1298 | { | |
1299 | *data = ss->ticket_appdata; | |
1300 | *len = ss->ticket_appdata_len; | |
1301 | return 1; | |
1302 | } | |
1303 | ||
1304 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION) |