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Commit | Line | Data |
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846e33c7 | 1 | /* |
677963e5 | 2 | * Copyright 1995-2017 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 BM |
12 | #include <openssl/lhash.h> |
13 | #include <openssl/rand.h> | |
3c27208f | 14 | #include <openssl/engine.h> |
677963e5 | 15 | #include "e_os.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 MC |
34 | { |
35 | return (ssl->session); | |
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 MC |
56 | { |
57 | return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); | |
58 | } | |
58964a49 | 59 | |
0821bcd4 | 60 | void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) |
0f113f3e MC |
61 | { |
62 | return (CRYPTO_get_ex_data(&s->ex_data, idx)); | |
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 | |
124 | dest->ciphers = NULL; | |
aff8c126 | 125 | dest->ext.hostname = NULL; |
708cf593 | 126 | #ifndef OPENSSL_NO_EC |
aff8c126 RS |
127 | dest->ext.ecpointformats = NULL; |
128 | dest->ext.supportedgroups = NULL; | |
708cf593 | 129 | #endif |
aff8c126 | 130 | dest->ext.tick = NULL; |
eed3ec90 | 131 | dest->ext.alpn_selected = NULL; |
708cf593 MC |
132 | #ifndef OPENSSL_NO_SRP |
133 | dest->srp_username = NULL; | |
134 | #endif | |
1ee21259 TS |
135 | dest->peer_chain = NULL; |
136 | dest->peer = NULL; | |
9b6a8254 | 137 | dest->ext.tick_nonce = NULL; |
51598215 | 138 | memset(&dest->ex_data, 0, sizeof(dest->ex_data)); |
9b6a8254 | 139 | |
708cf593 MC |
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 | ||
16203f7b AG |
146 | dest->lock = CRYPTO_THREAD_lock_new(); |
147 | if (dest->lock == NULL) | |
148 | goto err; | |
149 | ||
1ee21259 TS |
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 | } | |
708cf593 | 158 | |
36f038f1 DSH |
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 | } | |
98ece4ee MC |
164 | #ifndef OPENSSL_NO_PSK |
165 | if (src->psk_identity_hint) { | |
7644a9ae | 166 | dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint); |
98ece4ee MC |
167 | if (dest->psk_identity_hint == NULL) { |
168 | goto err; | |
169 | } | |
98ece4ee MC |
170 | } |
171 | if (src->psk_identity) { | |
7644a9ae | 172 | dest->psk_identity = OPENSSL_strdup(src->psk_identity); |
98ece4ee MC |
173 | if (dest->psk_identity == NULL) { |
174 | goto err; | |
175 | } | |
98ece4ee MC |
176 | } |
177 | #endif | |
178 | ||
e8aa8b6c | 179 | if (src->ciphers != NULL) { |
98ece4ee MC |
180 | dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers); |
181 | if (dest->ciphers == NULL) | |
182 | goto err; | |
98ece4ee MC |
183 | } |
184 | ||
185 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, | |
a230b26e | 186 | &dest->ex_data, &src->ex_data)) { |
98ece4ee MC |
187 | goto err; |
188 | } | |
189 | ||
aff8c126 RS |
190 | if (src->ext.hostname) { |
191 | dest->ext.hostname = OPENSSL_strdup(src->ext.hostname); | |
192 | if (dest->ext.hostname == NULL) { | |
98ece4ee MC |
193 | goto err; |
194 | } | |
98ece4ee | 195 | } |
708cf593 | 196 | #ifndef OPENSSL_NO_EC |
aff8c126 RS |
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) | |
98ece4ee | 202 | goto err; |
98ece4ee | 203 | } |
aff8c126 RS |
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) | |
98ece4ee | 209 | goto err; |
98ece4ee | 210 | } |
98ece4ee MC |
211 | #endif |
212 | ||
1ee21259 | 213 | if (ticket != 0 && src->ext.tick != NULL) { |
aff8c126 RS |
214 | dest->ext.tick = |
215 | OPENSSL_memdup(src->ext.tick, src->ext.ticklen); | |
216 | if (dest->ext.tick == NULL) | |
98ece4ee | 217 | goto err; |
708cf593 | 218 | } else { |
aff8c126 RS |
219 | dest->ext.tick_lifetime_hint = 0; |
220 | dest->ext.ticklen = 0; | |
98ece4ee MC |
221 | } |
222 | ||
eed3ec90 TS |
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 | ||
9b6a8254 MC |
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 | ||
98ece4ee | 239 | #ifndef OPENSSL_NO_SRP |
98ece4ee | 240 | if (src->srp_username) { |
7644a9ae | 241 | dest->srp_username = OPENSSL_strdup(src->srp_username); |
98ece4ee MC |
242 | if (dest->srp_username == NULL) { |
243 | goto err; | |
244 | } | |
98ece4ee MC |
245 | } |
246 | #endif | |
247 | ||
248 | return dest; | |
a230b26e | 249 | err: |
98ece4ee MC |
250 | SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); |
251 | SSL_SESSION_free(dest); | |
252 | return NULL; | |
253 | } | |
254 | ||
a230b26e | 255 | const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) |
0f113f3e MC |
256 | { |
257 | if (len) | |
348240c6 | 258 | *len = (unsigned int)s->session_id_length; |
0f113f3e MC |
259 | return s->session_id; |
260 | } | |
fddfc0af RG |
261 | const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s, |
262 | unsigned int *len) | |
263 | { | |
264 | if (len != NULL) | |
348240c6 | 265 | *len = (unsigned int)s->sid_ctx_length; |
fddfc0af RG |
266 | return s->sid_ctx; |
267 | } | |
4879ec7b | 268 | |
f9b0b452 | 269 | unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) |
0f113f3e MC |
270 | { |
271 | return s->compress_meth; | |
272 | } | |
273 | ||
274 | /* | |
275 | * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling | |
276 | * the ID with random junk repeatedly until we have no conflict is going to | |
277 | * complete in one iteration pretty much "most" of the time (btw: | |
278 | * understatement). So, if it takes us 10 iterations and we still can't avoid | |
279 | * a conflict - well that's a reasonable point to call it quits. Either the | |
280 | * RAND code is broken or someone is trying to open roughly very close to | |
281 | * 2^256 SSL sessions to our server. How you might store that many sessions | |
282 | * is perhaps a more interesting question ... | |
283 | */ | |
dc644fe2 GT |
284 | |
285 | #define MAX_SESS_ID_ATTEMPTS 10 | |
ae3947de | 286 | static int def_generate_session_id(SSL *ssl, unsigned char *id, |
0f113f3e | 287 | unsigned int *id_len) |
dc644fe2 | 288 | { |
0f113f3e MC |
289 | unsigned int retry = 0; |
290 | do | |
ae3947de | 291 | if (ssl_randbytes(ssl, id, *id_len) <= 0) |
0f113f3e MC |
292 | return 0; |
293 | while (SSL_has_matching_session_id(ssl, id, *id_len) && | |
294 | (++retry < MAX_SESS_ID_ATTEMPTS)) ; | |
295 | if (retry < MAX_SESS_ID_ATTEMPTS) | |
296 | return 1; | |
297 | /* else - woops a session_id match */ | |
298 | /* | |
299 | * XXX We should also check the external cache -- but the probability of | |
300 | * a collision is negligible, and we could not prevent the concurrent | |
301 | * creation of sessions with identical IDs since we currently don't have | |
302 | * means to atomically check whether a session ID already exists and make | |
303 | * a reservation for it if it does not (this problem applies to the | |
304 | * internal cache as well). | |
305 | */ | |
306 | return 0; | |
dc644fe2 GT |
307 | } |
308 | ||
6b691a5c | 309 | int ssl_get_new_session(SSL *s, int session) |
0f113f3e MC |
310 | { |
311 | /* This gets used by clients and servers. */ | |
312 | ||
313 | unsigned int tmp; | |
314 | SSL_SESSION *ss = NULL; | |
315 | GEN_SESSION_CB cb = def_generate_session_id; | |
316 | ||
317 | if ((ss = SSL_SESSION_new()) == NULL) | |
318 | return (0); | |
319 | ||
320 | /* If the context has a default timeout, use it */ | |
321 | if (s->session_ctx->session_timeout == 0) | |
322 | ss->timeout = SSL_get_default_timeout(s); | |
323 | else | |
324 | ss->timeout = s->session_ctx->session_timeout; | |
325 | ||
62adbcee RS |
326 | SSL_SESSION_free(s->session); |
327 | s->session = NULL; | |
0f113f3e MC |
328 | |
329 | if (session) { | |
330 | if (s->version == SSL3_VERSION) { | |
331 | ss->ssl_version = SSL3_VERSION; | |
332 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
333 | } else if (s->version == TLS1_VERSION) { | |
334 | ss->ssl_version = TLS1_VERSION; | |
335 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
336 | } else if (s->version == TLS1_1_VERSION) { | |
337 | ss->ssl_version = TLS1_1_VERSION; | |
338 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
339 | } else if (s->version == TLS1_2_VERSION) { | |
340 | ss->ssl_version = TLS1_2_VERSION; | |
341 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
582a17d6 MC |
342 | } else if (s->version == TLS1_3_VERSION) { |
343 | ss->ssl_version = TLS1_3_VERSION; | |
344 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
0f113f3e MC |
345 | } else if (s->version == DTLS1_BAD_VER) { |
346 | ss->ssl_version = DTLS1_BAD_VER; | |
347 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
348 | } else if (s->version == DTLS1_VERSION) { | |
349 | ss->ssl_version = DTLS1_VERSION; | |
350 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
351 | } else if (s->version == DTLS1_2_VERSION) { | |
352 | ss->ssl_version = DTLS1_2_VERSION; | |
353 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
354 | } else { | |
355 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); | |
356 | SSL_SESSION_free(ss); | |
357 | return (0); | |
358 | } | |
e481f9b9 | 359 | |
35a1cc90 MC |
360 | /*- |
361 | * If RFC5077 ticket, use empty session ID (as server). | |
362 | * Note that: | |
363 | * (a) ssl_get_prev_session() does lookahead into the | |
364 | * ClientHello extensions to find the session ticket. | |
d4d78943 MC |
365 | * When ssl_get_prev_session() fails, statem_srvr.c calls |
366 | * ssl_get_new_session() in tls_process_client_hello(). | |
35a1cc90 MC |
367 | * At that point, it has not yet parsed the extensions, |
368 | * however, because of the lookahead, it already knows | |
369 | * whether a ticket is expected or not. | |
370 | * | |
d4d78943 | 371 | * (b) statem_clnt.c calls ssl_get_new_session() before parsing |
35a1cc90 MC |
372 | * ServerHello extensions, and before recording the session |
373 | * ID received from the server, so this block is a noop. | |
374 | */ | |
aff8c126 | 375 | if (s->ext.ticket_expected) { |
0f113f3e MC |
376 | ss->session_id_length = 0; |
377 | goto sess_id_done; | |
378 | } | |
e481f9b9 | 379 | |
0f113f3e | 380 | /* Choose which callback will set the session ID */ |
16203f7b AG |
381 | CRYPTO_THREAD_read_lock(s->lock); |
382 | CRYPTO_THREAD_read_lock(s->session_ctx->lock); | |
0f113f3e MC |
383 | if (s->generate_session_id) |
384 | cb = s->generate_session_id; | |
385 | else if (s->session_ctx->generate_session_id) | |
386 | cb = s->session_ctx->generate_session_id; | |
16203f7b AG |
387 | CRYPTO_THREAD_unlock(s->session_ctx->lock); |
388 | CRYPTO_THREAD_unlock(s->lock); | |
0f113f3e | 389 | /* Choose a session ID */ |
947f3156 | 390 | memset(ss->session_id, 0, ss->session_id_length); |
348240c6 | 391 | tmp = (int)ss->session_id_length; |
0f113f3e MC |
392 | if (!cb(s, ss->session_id, &tmp)) { |
393 | /* The callback failed */ | |
394 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
395 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); | |
396 | SSL_SESSION_free(ss); | |
397 | return (0); | |
398 | } | |
399 | /* | |
400 | * Don't allow the callback to set the session length to zero. nor | |
401 | * set it higher than it was. | |
402 | */ | |
cc99bfa7 | 403 | if (tmp == 0 || tmp > ss->session_id_length) { |
0f113f3e MC |
404 | /* The callback set an illegal length */ |
405 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
406 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); | |
407 | SSL_SESSION_free(ss); | |
408 | return (0); | |
409 | } | |
410 | ss->session_id_length = tmp; | |
411 | /* Finally, check for a conflict */ | |
412 | if (SSL_has_matching_session_id(s, ss->session_id, | |
348240c6 | 413 | (unsigned int)ss->session_id_length)) { |
0f113f3e MC |
414 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); |
415 | SSL_SESSION_free(ss); | |
416 | return (0); | |
417 | } | |
e481f9b9 | 418 | |
0f113f3e | 419 | sess_id_done: |
aff8c126 RS |
420 | if (s->ext.hostname) { |
421 | ss->ext.hostname = OPENSSL_strdup(s->ext.hostname); | |
422 | if (ss->ext.hostname == NULL) { | |
0f113f3e MC |
423 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); |
424 | SSL_SESSION_free(ss); | |
425 | return 0; | |
426 | } | |
427 | } | |
0f113f3e MC |
428 | } else { |
429 | ss->session_id_length = 0; | |
430 | } | |
431 | ||
432 | if (s->sid_ctx_length > sizeof ss->sid_ctx) { | |
433 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
434 | SSL_SESSION_free(ss); | |
435 | return 0; | |
436 | } | |
437 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
438 | ss->sid_ctx_length = s->sid_ctx_length; | |
439 | s->session = ss; | |
440 | ss->ssl_version = s->version; | |
441 | ss->verify_result = X509_V_OK; | |
442 | ||
e7f0d921 DSH |
443 | /* If client supports extended master secret set it in session */ |
444 | if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) | |
445 | ss->flags |= SSL_SESS_FLAG_EXTMS; | |
446 | ||
0f113f3e MC |
447 | return (1); |
448 | } | |
d02b48c6 | 449 | |
3a83462d MC |
450 | /*- |
451 | * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this | |
c519e89f BM |
452 | * connection. It is only called by servers. |
453 | * | |
de7d61d5 | 454 | * hello: The parsed ClientHello data |
c519e89f BM |
455 | * |
456 | * Returns: | |
1053a6e2 MC |
457 | * -1: fatal error |
458 | * 0: no session found | |
459 | * 1: a session may have been found. | |
c519e89f BM |
460 | * |
461 | * Side effects: | |
462 | * - If a session is found then s->session is pointed at it (after freeing an | |
463 | * existing session if need be) and s->verify_result is set from the session. | |
aff8c126 | 464 | * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1 |
c519e89f BM |
465 | * if the server should issue a new session ticket (to 0 otherwise). |
466 | */ | |
1a9f457c | 467 | int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello, int *al) |
0f113f3e MC |
468 | { |
469 | /* This is used only by servers. */ | |
b56bce4f | 470 | |
0f113f3e MC |
471 | SSL_SESSION *ret = NULL; |
472 | int fatal = 0; | |
1053a6e2 | 473 | int try_session_cache = 0; |
ddf6ec00 | 474 | TICKET_RETURN r; |
d02b48c6 | 475 | |
1053a6e2 | 476 | if (SSL_IS_TLS13(s)) { |
fe874d27 MC |
477 | if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, |
478 | SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, | |
479 | NULL, 0, al) | |
480 | || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO, | |
1a9f457c | 481 | hello->pre_proc_exts, NULL, 0, al)) |
1053a6e2 MC |
482 | return -1; |
483 | ||
484 | ret = s->session; | |
485 | } else { | |
486 | /* sets s->ext.ticket_expected */ | |
487 | r = tls_get_ticket_from_client(s, hello, &ret); | |
488 | switch (r) { | |
ddf6ec00 | 489 | case TICKET_FATAL_ERR_MALLOC: |
61c32649 | 490 | case TICKET_FATAL_ERR_OTHER: |
1053a6e2 MC |
491 | fatal = 1; |
492 | goto err; | |
61c32649 MC |
493 | case TICKET_NONE: |
494 | case TICKET_EMPTY: | |
0afca811 KY |
495 | if (hello->session_id_len > 0) |
496 | try_session_cache = 1; | |
61c32649 MC |
497 | break; |
498 | case TICKET_NO_DECRYPT: | |
499 | case TICKET_SUCCESS: | |
ddf6ec00 | 500 | case TICKET_SUCCESS_RENEW: |
1053a6e2 | 501 | break; |
1053a6e2 | 502 | } |
0f113f3e | 503 | } |
c519e89f | 504 | |
0f113f3e MC |
505 | if (try_session_cache && |
506 | ret == NULL && | |
739a5eee | 507 | !(s->session_ctx->session_cache_mode & |
0f113f3e MC |
508 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { |
509 | SSL_SESSION data; | |
1ab3836b | 510 | |
0f113f3e | 511 | data.ssl_version = s->version; |
1ab3836b MC |
512 | memcpy(data.session_id, hello->session_id, hello->session_id_len); |
513 | data.session_id_length = hello->session_id_len; | |
514 | ||
16203f7b | 515 | CRYPTO_THREAD_read_lock(s->session_ctx->lock); |
0f113f3e MC |
516 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); |
517 | if (ret != NULL) { | |
518 | /* don't allow other threads to steal it: */ | |
16203f7b | 519 | SSL_SESSION_up_ref(ret); |
0f113f3e | 520 | } |
16203f7b | 521 | CRYPTO_THREAD_unlock(s->session_ctx->lock); |
0f113f3e MC |
522 | if (ret == NULL) |
523 | s->session_ctx->stats.sess_miss++; | |
524 | } | |
525 | ||
526 | if (try_session_cache && | |
527 | ret == NULL && s->session_ctx->get_session_cb != NULL) { | |
528 | int copy = 1; | |
1ab3836b MC |
529 | |
530 | ret = s->session_ctx->get_session_cb(s, hello->session_id, | |
531 | hello->session_id_len, | |
b6981744 | 532 | ©); |
0f113f3e | 533 | |
bf0fc412 | 534 | if (ret != NULL) { |
0f113f3e MC |
535 | s->session_ctx->stats.sess_cb_hit++; |
536 | ||
537 | /* | |
538 | * Increment reference count now if the session callback asks us | |
539 | * to do so (note that if the session structures returned by the | |
540 | * callback are shared between threads, it must handle the | |
541 | * reference count itself [i.e. copy == 0], or things won't be | |
542 | * thread-safe). | |
543 | */ | |
544 | if (copy) | |
16203f7b | 545 | SSL_SESSION_up_ref(ret); |
0f113f3e MC |
546 | |
547 | /* | |
548 | * Add the externally cached session to the internal cache as | |
549 | * well if and only if we are supposed to. | |
550 | */ | |
551 | if (! | |
739a5eee | 552 | (s->session_ctx->session_cache_mode & |
69f68237 | 553 | SSL_SESS_CACHE_NO_INTERNAL_STORE)) { |
0f113f3e | 554 | /* |
e29bb834 LZ |
555 | * Either return value of SSL_CTX_add_session should not |
556 | * interrupt the session resumption process. The return | |
557 | * value is intentionally ignored. | |
0f113f3e | 558 | */ |
e29bb834 | 559 | SSL_CTX_add_session(s->session_ctx, ret); |
69f68237 | 560 | } |
0f113f3e MC |
561 | } |
562 | } | |
563 | ||
564 | if (ret == NULL) | |
565 | goto err; | |
566 | ||
567 | /* Now ret is non-NULL and we own one of its reference counts. */ | |
568 | ||
128ae276 MC |
569 | /* Check TLS version consistency */ |
570 | if (ret->ssl_version != s->version) | |
571 | goto err; | |
572 | ||
0f113f3e MC |
573 | if (ret->sid_ctx_length != s->sid_ctx_length |
574 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { | |
575 | /* | |
576 | * We have the session requested by the client, but we don't want to | |
577 | * use it in this context. | |
578 | */ | |
579 | goto err; /* treat like cache miss */ | |
580 | } | |
581 | ||
582 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { | |
583 | /* | |
584 | * We can't be sure if this session is being used out of context, | |
585 | * which is especially important for SSL_VERIFY_PEER. The application | |
586 | * should have used SSL[_CTX]_set_session_id_context. For this error | |
587 | * case, we generate an error instead of treating the event like a | |
588 | * cache miss (otherwise it would be easy for applications to | |
589 | * effectively disable the session cache by accident without anyone | |
590 | * noticing). | |
591 | */ | |
592 | ||
593 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, | |
594 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); | |
595 | fatal = 1; | |
596 | goto err; | |
597 | } | |
598 | ||
0f113f3e MC |
599 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ |
600 | s->session_ctx->stats.sess_timeout++; | |
601 | if (try_session_cache) { | |
602 | /* session was from the cache, so remove it */ | |
603 | SSL_CTX_remove_session(s->session_ctx, ret); | |
604 | } | |
605 | goto err; | |
606 | } | |
607 | ||
e7f0d921 DSH |
608 | /* Check extended master secret extension consistency */ |
609 | if (ret->flags & SSL_SESS_FLAG_EXTMS) { | |
610 | /* If old session includes extms, but new does not: abort handshake */ | |
611 | if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS)) { | |
612 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, SSL_R_INCONSISTENT_EXTMS); | |
fb34a0f4 | 613 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
e7f0d921 DSH |
614 | fatal = 1; |
615 | goto err; | |
616 | } | |
617 | } else if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) { | |
618 | /* If new session includes extms, but old does not: do not resume */ | |
619 | goto err; | |
620 | } | |
621 | ||
1053a6e2 MC |
622 | if (!SSL_IS_TLS13(s)) { |
623 | /* We already did this for TLS1.3 */ | |
624 | SSL_SESSION_free(s->session); | |
625 | s->session = ret; | |
626 | } | |
0f113f3e | 627 | |
1053a6e2 | 628 | s->session_ctx->stats.sess_hit++; |
0f113f3e MC |
629 | s->verify_result = s->session->verify_result; |
630 | return 1; | |
8876bc05 BM |
631 | |
632 | err: | |
0f113f3e MC |
633 | if (ret != NULL) { |
634 | SSL_SESSION_free(ret); | |
1f5b44e9 | 635 | /* In TLSv1.3 s->session was already set to ret, so we NULL it out */ |
128ae276 MC |
636 | if (SSL_IS_TLS13(s)) |
637 | s->session = NULL; | |
e481f9b9 | 638 | |
0f113f3e MC |
639 | if (!try_session_cache) { |
640 | /* | |
641 | * The session was from a ticket, so we should issue a ticket for | |
642 | * the new session | |
643 | */ | |
aff8c126 | 644 | s->ext.ticket_expected = 1; |
0f113f3e | 645 | } |
0f113f3e | 646 | } |
1a9f457c MC |
647 | if (fatal) { |
648 | *al = SSL_AD_INTERNAL_ERROR; | |
0f113f3e | 649 | return -1; |
1a9f457c | 650 | } |
40f805ad MC |
651 | |
652 | return 0; | |
0f113f3e | 653 | } |
d02b48c6 | 654 | |
6b691a5c | 655 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) |
0f113f3e MC |
656 | { |
657 | int ret = 0; | |
658 | SSL_SESSION *s; | |
659 | ||
660 | /* | |
661 | * add just 1 reference count for the SSL_CTX's session cache even though | |
662 | * it has two ways of access: each session is in a doubly linked list and | |
663 | * an lhash | |
664 | */ | |
16203f7b | 665 | SSL_SESSION_up_ref(c); |
0f113f3e MC |
666 | /* |
667 | * if session c is in already in cache, we take back the increment later | |
668 | */ | |
669 | ||
16203f7b | 670 | CRYPTO_THREAD_write_lock(ctx->lock); |
0f113f3e MC |
671 | s = lh_SSL_SESSION_insert(ctx->sessions, c); |
672 | ||
673 | /* | |
674 | * s != NULL iff we already had a session with the given PID. In this | |
675 | * case, s == c should hold (then we did not really modify | |
676 | * ctx->sessions), or we're in trouble. | |
677 | */ | |
678 | if (s != NULL && s != c) { | |
679 | /* We *are* in trouble ... */ | |
680 | SSL_SESSION_list_remove(ctx, s); | |
681 | SSL_SESSION_free(s); | |
682 | /* | |
683 | * ... so pretend the other session did not exist in cache (we cannot | |
684 | * handle two SSL_SESSION structures with identical session ID in the | |
685 | * same cache, which could happen e.g. when two threads concurrently | |
686 | * obtain the same session from an external cache) | |
687 | */ | |
688 | s = NULL; | |
38088ce9 BE |
689 | } else if (s == NULL && |
690 | lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { | |
691 | /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ | |
692 | ||
693 | /* | |
694 | * ... so take back the extra reference and also don't add | |
695 | * the session to the SSL_SESSION_list at this time | |
696 | */ | |
697 | s = c; | |
0f113f3e MC |
698 | } |
699 | ||
700 | /* Put at the head of the queue unless it is already in the cache */ | |
701 | if (s == NULL) | |
702 | SSL_SESSION_list_add(ctx, c); | |
703 | ||
704 | if (s != NULL) { | |
705 | /* | |
706 | * existing cache entry -- decrement previously incremented reference | |
707 | * count because it already takes into account the cache | |
708 | */ | |
709 | ||
710 | SSL_SESSION_free(s); /* s == c */ | |
711 | ret = 0; | |
712 | } else { | |
713 | /* | |
714 | * new cache entry -- remove old ones if cache has become too large | |
715 | */ | |
716 | ||
717 | ret = 1; | |
718 | ||
719 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
a230b26e | 720 | while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) { |
0f113f3e MC |
721 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) |
722 | break; | |
723 | else | |
724 | ctx->stats.sess_cache_full++; | |
725 | } | |
726 | } | |
727 | } | |
16203f7b AG |
728 | CRYPTO_THREAD_unlock(ctx->lock); |
729 | return ret; | |
0f113f3e | 730 | } |
d02b48c6 | 731 | |
6b691a5c | 732 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) |
801294f8 | 733 | { |
0f113f3e | 734 | return remove_session_lock(ctx, c, 1); |
801294f8 DSH |
735 | } |
736 | ||
0fda2e37 | 737 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) |
0f113f3e MC |
738 | { |
739 | SSL_SESSION *r; | |
740 | int ret = 0; | |
741 | ||
742 | if ((c != NULL) && (c->session_id_length != 0)) { | |
743 | if (lck) | |
16203f7b | 744 | CRYPTO_THREAD_write_lock(ctx->lock); |
0f113f3e MC |
745 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { |
746 | ret = 1; | |
747 | r = lh_SSL_SESSION_delete(ctx->sessions, c); | |
748 | SSL_SESSION_list_remove(ctx, c); | |
749 | } | |
e4612d02 | 750 | c->not_resumable = 1; |
0f113f3e MC |
751 | |
752 | if (lck) | |
16203f7b | 753 | CRYPTO_THREAD_unlock(ctx->lock); |
0f113f3e | 754 | |
e4612d02 | 755 | if (ret) |
0f113f3e | 756 | SSL_SESSION_free(r); |
e4612d02 MC |
757 | |
758 | if (ctx->remove_session_cb != NULL) | |
759 | ctx->remove_session_cb(ctx, c); | |
0f113f3e MC |
760 | } else |
761 | ret = 0; | |
762 | return (ret); | |
763 | } | |
d02b48c6 | 764 | |
6b691a5c | 765 | void SSL_SESSION_free(SSL_SESSION *ss) |
0f113f3e MC |
766 | { |
767 | int i; | |
d02b48c6 | 768 | |
0f113f3e MC |
769 | if (ss == NULL) |
770 | return; | |
e03ddfae | 771 | |
2f545ae4 | 772 | CRYPTO_DOWN_REF(&ss->references, &i, ss->lock); |
f3f1cf84 | 773 | REF_PRINT_COUNT("SSL_SESSION", ss); |
0f113f3e MC |
774 | if (i > 0) |
775 | return; | |
f3f1cf84 | 776 | REF_ASSERT_ISNT(i < 0); |
d02b48c6 | 777 | |
0f113f3e | 778 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
58964a49 | 779 | |
0f113f3e MC |
780 | OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); |
781 | OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); | |
222561fe | 782 | X509_free(ss->peer); |
c34b0f99 | 783 | sk_X509_pop_free(ss->peer_chain, X509_free); |
25aaa98a | 784 | sk_SSL_CIPHER_free(ss->ciphers); |
aff8c126 RS |
785 | OPENSSL_free(ss->ext.hostname); |
786 | OPENSSL_free(ss->ext.tick); | |
e481f9b9 | 787 | #ifndef OPENSSL_NO_EC |
aff8c126 RS |
788 | OPENSSL_free(ss->ext.ecpointformats); |
789 | ss->ext.ecpointformats = NULL; | |
790 | ss->ext.ecpointformats_len = 0; | |
791 | OPENSSL_free(ss->ext.supportedgroups); | |
792 | ss->ext.supportedgroups = NULL; | |
793 | ss->ext.supportedgroups_len = 0; | |
a230b26e | 794 | #endif /* OPENSSL_NO_EC */ |
ddac1974 | 795 | #ifndef OPENSSL_NO_PSK |
25aaa98a RS |
796 | OPENSSL_free(ss->psk_identity_hint); |
797 | OPENSSL_free(ss->psk_identity); | |
edc032b5 BL |
798 | #endif |
799 | #ifndef OPENSSL_NO_SRP | |
25aaa98a | 800 | OPENSSL_free(ss->srp_username); |
ed3883d2 | 801 | #endif |
f6370040 | 802 | OPENSSL_free(ss->ext.alpn_selected); |
9b6a8254 | 803 | OPENSSL_free(ss->ext.tick_nonce); |
16203f7b | 804 | CRYPTO_THREAD_lock_free(ss->lock); |
4b45c6e5 | 805 | OPENSSL_clear_free(ss, sizeof(*ss)); |
0f113f3e | 806 | } |
d02b48c6 | 807 | |
16203f7b AG |
808 | int SSL_SESSION_up_ref(SSL_SESSION *ss) |
809 | { | |
810 | int i; | |
811 | ||
2f545ae4 | 812 | if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0) |
16203f7b AG |
813 | return 0; |
814 | ||
815 | REF_PRINT_COUNT("SSL_SESSION", ss); | |
816 | REF_ASSERT_ISNT(i < 2); | |
817 | return ((i > 1) ? 1 : 0); | |
818 | } | |
819 | ||
6b691a5c | 820 | int SSL_set_session(SSL *s, SSL_SESSION *session) |
0f113f3e | 821 | { |
e70656cf MC |
822 | ssl_clear_bad_session(s); |
823 | if (s->ctx->method != s->method) { | |
824 | if (!SSL_set_ssl_method(s, s->ctx->method)) | |
825 | return 0; | |
826 | } | |
0f113f3e | 827 | |
e70656cf | 828 | if (session != NULL) { |
16203f7b | 829 | SSL_SESSION_up_ref(session); |
e70656cf | 830 | s->verify_result = session->verify_result; |
0f113f3e | 831 | } |
e70656cf MC |
832 | SSL_SESSION_free(s->session); |
833 | s->session = session; | |
834 | ||
835 | return 1; | |
0f113f3e | 836 | } |
d02b48c6 | 837 | |
fddfc0af RG |
838 | int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, |
839 | unsigned int sid_len) | |
840 | { | |
841 | if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { | |
842 | SSLerr(SSL_F_SSL_SESSION_SET1_ID, | |
843 | SSL_R_SSL_SESSION_ID_TOO_LONG); | |
844 | return 0; | |
845 | } | |
846 | s->session_id_length = sid_len; | |
6aad9393 RG |
847 | if (sid != s->session_id) |
848 | memcpy(s->session_id, sid, sid_len); | |
fddfc0af RG |
849 | return 1; |
850 | } | |
851 | ||
6b691a5c | 852 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) |
0f113f3e MC |
853 | { |
854 | if (s == NULL) | |
855 | return (0); | |
856 | s->timeout = t; | |
857 | return (1); | |
858 | } | |
d02b48c6 | 859 | |
0821bcd4 | 860 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) |
0f113f3e MC |
861 | { |
862 | if (s == NULL) | |
863 | return (0); | |
864 | return (s->timeout); | |
865 | } | |
d02b48c6 | 866 | |
0821bcd4 | 867 | long SSL_SESSION_get_time(const SSL_SESSION *s) |
0f113f3e MC |
868 | { |
869 | if (s == NULL) | |
870 | return (0); | |
871 | return (s->time); | |
872 | } | |
d02b48c6 | 873 | |
6b691a5c | 874 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) |
0f113f3e MC |
875 | { |
876 | if (s == NULL) | |
877 | return (0); | |
878 | s->time = t; | |
879 | return (t); | |
880 | } | |
d02b48c6 | 881 | |
bd01f649 TS |
882 | int SSL_SESSION_get_protocol_version(const SSL_SESSION *s) |
883 | { | |
bd01f649 TS |
884 | return s->ssl_version; |
885 | } | |
886 | ||
5a43d511 MC |
887 | int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version) |
888 | { | |
889 | s->ssl_version = version; | |
890 | return 1; | |
891 | } | |
892 | ||
e9281323 RS |
893 | const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s) |
894 | { | |
895 | return s->cipher; | |
896 | } | |
1a993d1d MC |
897 | |
898 | int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher) | |
899 | { | |
900 | s->cipher = cipher; | |
901 | return 1; | |
902 | } | |
e9281323 | 903 | |
4b6b8487 LC |
904 | const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s) |
905 | { | |
aff8c126 | 906 | return s->ext.hostname; |
4b6b8487 LC |
907 | } |
908 | ||
f2baac27 MC |
909 | int SSL_SESSION_has_ticket(const SSL_SESSION *s) |
910 | { | |
aff8c126 | 911 | return (s->ext.ticklen > 0) ? 1 : 0; |
f2baac27 MC |
912 | } |
913 | ||
914 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) | |
915 | { | |
aff8c126 | 916 | return s->ext.tick_lifetime_hint; |
f2baac27 MC |
917 | } |
918 | ||
48593cb1 | 919 | void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick, |
a230b26e | 920 | size_t *len) |
b7c9187b | 921 | { |
aff8c126 | 922 | *len = s->ext.ticklen; |
61986d32 | 923 | if (tick != NULL) |
aff8c126 | 924 | *tick = s->ext.tick; |
b7c9187b MC |
925 | } |
926 | ||
fcc47578 MC |
927 | uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s) |
928 | { | |
929 | return s->ext.max_early_data; | |
930 | } | |
931 | ||
08557cf2 | 932 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) |
0f113f3e MC |
933 | { |
934 | return s->peer; | |
935 | } | |
936 | ||
937 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, | |
938 | unsigned int sid_ctx_len) | |
939 | { | |
940 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
941 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, | |
942 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
943 | return 0; | |
944 | } | |
945 | s->sid_ctx_length = sid_ctx_len; | |
6aad9393 RG |
946 | if (sid_ctx != s->sid_ctx) |
947 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); | |
0f113f3e MC |
948 | |
949 | return 1; | |
950 | } | |
08557cf2 | 951 | |
e586eac8 MC |
952 | int SSL_SESSION_is_resumable(const SSL_SESSION *s) |
953 | { | |
954 | /* | |
955 | * In the case of EAP-FAST, we can have a pre-shared "ticket" without a | |
956 | * session ID. | |
957 | */ | |
958 | return !s->not_resumable | |
959 | && (s->session_id_length > 0 || s->ext.ticklen > 0); | |
960 | } | |
961 | ||
6b691a5c | 962 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) |
0f113f3e MC |
963 | { |
964 | long l; | |
965 | if (s == NULL) | |
966 | return (0); | |
967 | l = s->session_timeout; | |
968 | s->session_timeout = t; | |
969 | return (l); | |
970 | } | |
413c4f45 | 971 | |
0821bcd4 | 972 | long SSL_CTX_get_timeout(const SSL_CTX *s) |
0f113f3e MC |
973 | { |
974 | if (s == NULL) | |
975 | return (0); | |
976 | return (s->session_timeout); | |
977 | } | |
413c4f45 | 978 | |
0f113f3e | 979 | int SSL_set_session_secret_cb(SSL *s, |
aff8c126 | 980 | tls_session_secret_cb_fn tls_session_secret_cb, |
0f113f3e MC |
981 | void *arg) |
982 | { | |
983 | if (s == NULL) | |
984 | return (0); | |
aff8c126 RS |
985 | s->ext.session_secret_cb = tls_session_secret_cb; |
986 | s->ext.session_secret_cb_arg = arg; | |
0f113f3e MC |
987 | return (1); |
988 | } | |
12bf56c0 DSH |
989 | |
990 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, | |
0f113f3e MC |
991 | void *arg) |
992 | { | |
993 | if (s == NULL) | |
994 | return (0); | |
aff8c126 RS |
995 | s->ext.session_ticket_cb = cb; |
996 | s->ext.session_ticket_cb_arg = arg; | |
0f113f3e MC |
997 | return (1); |
998 | } | |
12bf56c0 DSH |
999 | |
1000 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) | |
0f113f3e MC |
1001 | { |
1002 | if (s->version >= TLS1_VERSION) { | |
aff8c126 RS |
1003 | OPENSSL_free(s->ext.session_ticket); |
1004 | s->ext.session_ticket = NULL; | |
1005 | s->ext.session_ticket = | |
0f113f3e | 1006 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); |
aff8c126 | 1007 | if (s->ext.session_ticket == NULL) { |
0f113f3e MC |
1008 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); |
1009 | return 0; | |
1010 | } | |
1011 | ||
1ed327f7 | 1012 | if (ext_data != NULL) { |
aff8c126 RS |
1013 | s->ext.session_ticket->length = ext_len; |
1014 | s->ext.session_ticket->data = s->ext.session_ticket + 1; | |
1015 | memcpy(s->ext.session_ticket->data, ext_data, ext_len); | |
0f113f3e | 1016 | } else { |
aff8c126 RS |
1017 | s->ext.session_ticket->length = 0; |
1018 | s->ext.session_ticket->data = NULL; | |
0f113f3e MC |
1019 | } |
1020 | ||
1021 | return 1; | |
1022 | } | |
1023 | ||
1024 | return 0; | |
1025 | } | |
0f113f3e MC |
1026 | |
1027 | typedef struct timeout_param_st { | |
1028 | SSL_CTX *ctx; | |
1029 | long time; | |
1030 | LHASH_OF(SSL_SESSION) *cache; | |
1031 | } TIMEOUT_PARAM; | |
d02b48c6 | 1032 | |
2a056de8 | 1033 | static void timeout_cb(SSL_SESSION *s, TIMEOUT_PARAM *p) |
0f113f3e MC |
1034 | { |
1035 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
1036 | /* | |
1037 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
1038 | * locking overhead | |
1039 | */ | |
1040 | (void)lh_SSL_SESSION_delete(p->cache, s); | |
1041 | SSL_SESSION_list_remove(p->ctx, s); | |
1042 | s->not_resumable = 1; | |
1043 | if (p->ctx->remove_session_cb != NULL) | |
1044 | p->ctx->remove_session_cb(p->ctx, s); | |
1045 | SSL_SESSION_free(s); | |
1046 | } | |
1047 | } | |
d02b48c6 | 1048 | |
2a056de8 | 1049 | IMPLEMENT_LHASH_DOALL_ARG(SSL_SESSION, TIMEOUT_PARAM); |
3c914840 | 1050 | |
6b691a5c | 1051 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) |
0f113f3e MC |
1052 | { |
1053 | unsigned long i; | |
1054 | TIMEOUT_PARAM tp; | |
1055 | ||
1056 | tp.ctx = s; | |
1057 | tp.cache = s->sessions; | |
1058 | if (tp.cache == NULL) | |
1059 | return; | |
1060 | tp.time = t; | |
16203f7b | 1061 | CRYPTO_THREAD_write_lock(s->lock); |
739a1eb1 RS |
1062 | i = lh_SSL_SESSION_get_down_load(s->sessions); |
1063 | lh_SSL_SESSION_set_down_load(s->sessions, 0); | |
2a056de8 | 1064 | lh_SSL_SESSION_doall_TIMEOUT_PARAM(tp.cache, timeout_cb, &tp); |
739a1eb1 | 1065 | lh_SSL_SESSION_set_down_load(s->sessions, i); |
16203f7b | 1066 | CRYPTO_THREAD_unlock(s->lock); |
0f113f3e | 1067 | } |
d02b48c6 | 1068 | |
6b691a5c | 1069 | int ssl_clear_bad_session(SSL *s) |
0f113f3e MC |
1070 | { |
1071 | if ((s->session != NULL) && | |
1072 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
1073 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
e2bb9b9b | 1074 | SSL_CTX_remove_session(s->session_ctx, s->session); |
0f113f3e MC |
1075 | return (1); |
1076 | } else | |
1077 | return (0); | |
1078 | } | |
58964a49 RE |
1079 | |
1080 | /* locked by SSL_CTX in the calling function */ | |
6b691a5c | 1081 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1082 | { |
1083 | if ((s->next == NULL) || (s->prev == NULL)) | |
1084 | return; | |
1085 | ||
1086 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
1087 | /* last element in list */ | |
1088 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1089 | /* only one element in list */ | |
1090 | ctx->session_cache_head = NULL; | |
1091 | ctx->session_cache_tail = NULL; | |
1092 | } else { | |
1093 | ctx->session_cache_tail = s->prev; | |
1094 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1095 | } | |
1096 | } else { | |
1097 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1098 | /* first element in list */ | |
1099 | ctx->session_cache_head = s->next; | |
1100 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1101 | } else { | |
1102 | /* middle of list */ | |
1103 | s->next->prev = s->prev; | |
1104 | s->prev->next = s->next; | |
1105 | } | |
1106 | } | |
1107 | s->prev = s->next = NULL; | |
1108 | } | |
58964a49 | 1109 | |
6b691a5c | 1110 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1111 | { |
1112 | if ((s->next != NULL) && (s->prev != NULL)) | |
1113 | SSL_SESSION_list_remove(ctx, s); | |
1114 | ||
1115 | if (ctx->session_cache_head == NULL) { | |
1116 | ctx->session_cache_head = s; | |
1117 | ctx->session_cache_tail = s; | |
1118 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1119 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1120 | } else { | |
1121 | s->next = ctx->session_cache_head; | |
1122 | s->next->prev = s; | |
1123 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1124 | ctx->session_cache_head = s; | |
1125 | } | |
1126 | } | |
58964a49 | 1127 | |
7806f3dd | 1128 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
a230b26e | 1129 | int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess)) |
0f113f3e MC |
1130 | { |
1131 | ctx->new_session_cb = cb; | |
1132 | } | |
7806f3dd | 1133 | |
0f113f3e MC |
1134 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { |
1135 | return ctx->new_session_cb; | |
1136 | } | |
7806f3dd NL |
1137 | |
1138 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1139 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) |
1140 | { | |
1141 | ctx->remove_session_cb = cb; | |
1142 | } | |
7806f3dd | 1143 | |
0f113f3e MC |
1144 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, |
1145 | SSL_SESSION *sess) { | |
1146 | return ctx->remove_session_cb; | |
1147 | } | |
7806f3dd NL |
1148 | |
1149 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
0f113f3e | 1150 | SSL_SESSION *(*cb) (struct ssl_st *ssl, |
b6981744 EK |
1151 | const unsigned char *data, |
1152 | int len, int *copy)) | |
0f113f3e MC |
1153 | { |
1154 | ctx->get_session_cb = cb; | |
1155 | } | |
1156 | ||
1157 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
a230b26e EK |
1158 | const unsigned char |
1159 | *data, int len, | |
1160 | int *copy) { | |
0f113f3e MC |
1161 | return ctx->get_session_cb; |
1162 | } | |
1163 | ||
1164 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
1165 | void (*cb) (const SSL *ssl, int type, int val)) | |
1166 | { | |
1167 | ctx->info_callback = cb; | |
1168 | } | |
1169 | ||
1170 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
1171 | int val) { | |
1172 | return ctx->info_callback; | |
1173 | } | |
7806f3dd NL |
1174 | |
1175 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1176 | int (*cb) (SSL *ssl, X509 **x509, |
1177 | EVP_PKEY **pkey)) | |
1178 | { | |
1179 | ctx->client_cert_cb = cb; | |
1180 | } | |
7806f3dd | 1181 | |
0f113f3e MC |
1182 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, |
1183 | EVP_PKEY **pkey) { | |
1184 | return ctx->client_cert_cb; | |
1185 | } | |
7806f3dd | 1186 | |
368888bc DSH |
1187 | #ifndef OPENSSL_NO_ENGINE |
1188 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
0f113f3e MC |
1189 | { |
1190 | if (!ENGINE_init(e)) { | |
1191 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
1192 | return 0; | |
1193 | } | |
1194 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
1195 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
1196 | SSL_R_NO_CLIENT_CERT_METHOD); | |
1197 | ENGINE_finish(e); | |
1198 | return 0; | |
1199 | } | |
1200 | ctx->client_cert_engine = e; | |
1201 | return 1; | |
1202 | } | |
368888bc DSH |
1203 | #endif |
1204 | ||
7806f3dd | 1205 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, |
0f113f3e MC |
1206 | int (*cb) (SSL *ssl, |
1207 | unsigned char *cookie, | |
1208 | unsigned int *cookie_len)) | |
1209 | { | |
1210 | ctx->app_gen_cookie_cb = cb; | |
1211 | } | |
7806f3dd NL |
1212 | |
1213 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
a230b26e EK |
1214 | int (*cb) (SSL *ssl, |
1215 | const unsigned char *cookie, | |
0f113f3e MC |
1216 | unsigned int cookie_len)) |
1217 | { | |
1218 | ctx->app_verify_cookie_cb = cb; | |
1219 | } | |
7806f3dd | 1220 | |
a230b26e | 1221 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION) |