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d02b48c6 | 1 | /* ssl/ssl_sess.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
0f113f3e | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
f1fd4544 BM |
58 | /* ==================================================================== |
59 | * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
f1fd4544 BM |
67 | * |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
ddac1974 NL |
111 | /* ==================================================================== |
112 | * Copyright 2005 Nokia. All rights reserved. | |
113 | * | |
114 | * The portions of the attached software ("Contribution") is developed by | |
115 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
116 | * license. | |
117 | * | |
118 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
119 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
120 | * support (see RFC 4279) to OpenSSL. | |
121 | * | |
122 | * No patent licenses or other rights except those expressly stated in | |
123 | * the OpenSSL open source license shall be deemed granted or received | |
124 | * expressly, by implication, estoppel, or otherwise. | |
125 | * | |
126 | * No assurances are provided by Nokia that the Contribution does not | |
127 | * infringe the patent or other intellectual property rights of any third | |
128 | * party or that the license provides you with all the necessary rights | |
129 | * to make use of the Contribution. | |
130 | * | |
131 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
132 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
133 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
134 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
135 | * OTHERWISE. | |
136 | */ | |
d02b48c6 RE |
137 | |
138 | #include <stdio.h> | |
ec577822 BM |
139 | #include <openssl/lhash.h> |
140 | #include <openssl/rand.h> | |
368888bc | 141 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 142 | # include <openssl/engine.h> |
368888bc | 143 | #endif |
d02b48c6 RE |
144 | #include "ssl_locl.h" |
145 | ||
58964a49 | 146 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); |
0f113f3e | 147 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); |
801294f8 | 148 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); |
58964a49 | 149 | |
0821bcd4 | 150 | SSL_SESSION *SSL_get_session(const SSL *ssl) |
52732b38 | 151 | /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ |
0f113f3e MC |
152 | { |
153 | return (ssl->session); | |
154 | } | |
52732b38 BM |
155 | |
156 | SSL_SESSION *SSL_get1_session(SSL *ssl) | |
157 | /* variant of SSL_get_session: caller really gets something */ | |
0f113f3e MC |
158 | { |
159 | SSL_SESSION *sess; | |
160 | /* | |
161 | * Need to lock this all up rather than just use CRYPTO_add so that | |
162 | * somebody doesn't free ssl->session between when we check it's non-null | |
163 | * and when we up the reference count. | |
164 | */ | |
165 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); | |
166 | sess = ssl->session; | |
167 | if (sess) | |
168 | sess->references++; | |
169 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); | |
170 | return (sess); | |
171 | } | |
172 | ||
173 | int SSL_SESSION_get_ex_new_index(long argl, void *argp, | |
174 | CRYPTO_EX_new *new_func, | |
175 | CRYPTO_EX_dup *dup_func, | |
176 | CRYPTO_EX_free *free_func) | |
177 | { | |
178 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, | |
179 | new_func, dup_func, free_func); | |
180 | } | |
58964a49 | 181 | |
6b691a5c | 182 | int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) |
0f113f3e MC |
183 | { |
184 | return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); | |
185 | } | |
58964a49 | 186 | |
0821bcd4 | 187 | void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) |
0f113f3e MC |
188 | { |
189 | return (CRYPTO_get_ex_data(&s->ex_data, idx)); | |
190 | } | |
58964a49 | 191 | |
6b691a5c | 192 | SSL_SESSION *SSL_SESSION_new(void) |
0f113f3e MC |
193 | { |
194 | SSL_SESSION *ss; | |
195 | ||
196 | ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); | |
197 | if (ss == NULL) { | |
198 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); | |
199 | return (0); | |
200 | } | |
201 | memset(ss, 0, sizeof(SSL_SESSION)); | |
202 | ||
203 | ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ | |
204 | ss->references = 1; | |
205 | ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ | |
206 | ss->time = (unsigned long)time(NULL); | |
207 | ss->prev = NULL; | |
208 | ss->next = NULL; | |
209 | ss->compress_meth = 0; | |
ed3883d2 | 210 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
211 | ss->tlsext_hostname = NULL; |
212 | # ifndef OPENSSL_NO_EC | |
213 | ss->tlsext_ecpointformatlist_length = 0; | |
214 | ss->tlsext_ecpointformatlist = NULL; | |
215 | ss->tlsext_ellipticcurvelist_length = 0; | |
216 | ss->tlsext_ellipticcurvelist = NULL; | |
217 | # endif | |
ed3883d2 | 218 | #endif |
0f113f3e | 219 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
ddac1974 | 220 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
221 | ss->psk_identity_hint = NULL; |
222 | ss->psk_identity = NULL; | |
edc032b5 BL |
223 | #endif |
224 | #ifndef OPENSSL_NO_SRP | |
0f113f3e | 225 | ss->srp_username = NULL; |
ddac1974 | 226 | #endif |
0f113f3e MC |
227 | return (ss); |
228 | } | |
d02b48c6 | 229 | |
0f113f3e MC |
230 | const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, |
231 | unsigned int *len) | |
232 | { | |
233 | if (len) | |
234 | *len = s->session_id_length; | |
235 | return s->session_id; | |
236 | } | |
4879ec7b | 237 | |
f9b0b452 | 238 | unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) |
0f113f3e MC |
239 | { |
240 | return s->compress_meth; | |
241 | } | |
242 | ||
243 | /* | |
244 | * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling | |
245 | * the ID with random junk repeatedly until we have no conflict is going to | |
246 | * complete in one iteration pretty much "most" of the time (btw: | |
247 | * understatement). So, if it takes us 10 iterations and we still can't avoid | |
248 | * a conflict - well that's a reasonable point to call it quits. Either the | |
249 | * RAND code is broken or someone is trying to open roughly very close to | |
250 | * 2^256 SSL sessions to our server. How you might store that many sessions | |
251 | * is perhaps a more interesting question ... | |
252 | */ | |
dc644fe2 GT |
253 | |
254 | #define MAX_SESS_ID_ATTEMPTS 10 | |
255 | static int def_generate_session_id(const SSL *ssl, unsigned char *id, | |
0f113f3e | 256 | unsigned int *id_len) |
dc644fe2 | 257 | { |
0f113f3e MC |
258 | unsigned int retry = 0; |
259 | do | |
260 | if (RAND_pseudo_bytes(id, *id_len) <= 0) | |
261 | return 0; | |
262 | while (SSL_has_matching_session_id(ssl, id, *id_len) && | |
263 | (++retry < MAX_SESS_ID_ATTEMPTS)) ; | |
264 | if (retry < MAX_SESS_ID_ATTEMPTS) | |
265 | return 1; | |
266 | /* else - woops a session_id match */ | |
267 | /* | |
268 | * XXX We should also check the external cache -- but the probability of | |
269 | * a collision is negligible, and we could not prevent the concurrent | |
270 | * creation of sessions with identical IDs since we currently don't have | |
271 | * means to atomically check whether a session ID already exists and make | |
272 | * a reservation for it if it does not (this problem applies to the | |
273 | * internal cache as well). | |
274 | */ | |
275 | return 0; | |
dc644fe2 GT |
276 | } |
277 | ||
6b691a5c | 278 | int ssl_get_new_session(SSL *s, int session) |
0f113f3e MC |
279 | { |
280 | /* This gets used by clients and servers. */ | |
281 | ||
282 | unsigned int tmp; | |
283 | SSL_SESSION *ss = NULL; | |
284 | GEN_SESSION_CB cb = def_generate_session_id; | |
285 | ||
286 | if ((ss = SSL_SESSION_new()) == NULL) | |
287 | return (0); | |
288 | ||
289 | /* If the context has a default timeout, use it */ | |
290 | if (s->session_ctx->session_timeout == 0) | |
291 | ss->timeout = SSL_get_default_timeout(s); | |
292 | else | |
293 | ss->timeout = s->session_ctx->session_timeout; | |
294 | ||
295 | if (s->session != NULL) { | |
296 | SSL_SESSION_free(s->session); | |
297 | s->session = NULL; | |
298 | } | |
299 | ||
300 | if (session) { | |
301 | if (s->version == SSL3_VERSION) { | |
302 | ss->ssl_version = SSL3_VERSION; | |
303 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
304 | } else if (s->version == TLS1_VERSION) { | |
305 | ss->ssl_version = TLS1_VERSION; | |
306 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
307 | } else if (s->version == TLS1_1_VERSION) { | |
308 | ss->ssl_version = TLS1_1_VERSION; | |
309 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
310 | } else if (s->version == TLS1_2_VERSION) { | |
311 | ss->ssl_version = TLS1_2_VERSION; | |
312 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
313 | } else if (s->version == DTLS1_BAD_VER) { | |
314 | ss->ssl_version = DTLS1_BAD_VER; | |
315 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
316 | } else if (s->version == DTLS1_VERSION) { | |
317 | ss->ssl_version = DTLS1_VERSION; | |
318 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
319 | } else if (s->version == DTLS1_2_VERSION) { | |
320 | ss->ssl_version = DTLS1_2_VERSION; | |
321 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
322 | } else { | |
323 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); | |
324 | SSL_SESSION_free(ss); | |
325 | return (0); | |
326 | } | |
6434abbf | 327 | #ifndef OPENSSL_NO_TLSEXT |
35a1cc90 MC |
328 | /*- |
329 | * If RFC5077 ticket, use empty session ID (as server). | |
330 | * Note that: | |
331 | * (a) ssl_get_prev_session() does lookahead into the | |
332 | * ClientHello extensions to find the session ticket. | |
333 | * When ssl_get_prev_session() fails, s3_srvr.c calls | |
334 | * ssl_get_new_session() in ssl3_get_client_hello(). | |
335 | * At that point, it has not yet parsed the extensions, | |
336 | * however, because of the lookahead, it already knows | |
337 | * whether a ticket is expected or not. | |
338 | * | |
339 | * (b) s3_clnt.c calls ssl_get_new_session() before parsing | |
340 | * ServerHello extensions, and before recording the session | |
341 | * ID received from the server, so this block is a noop. | |
342 | */ | |
0f113f3e MC |
343 | if (s->tlsext_ticket_expected) { |
344 | ss->session_id_length = 0; | |
345 | goto sess_id_done; | |
346 | } | |
6434abbf | 347 | #endif |
0f113f3e MC |
348 | /* Choose which callback will set the session ID */ |
349 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
350 | if (s->generate_session_id) | |
351 | cb = s->generate_session_id; | |
352 | else if (s->session_ctx->generate_session_id) | |
353 | cb = s->session_ctx->generate_session_id; | |
354 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
355 | /* Choose a session ID */ | |
356 | tmp = ss->session_id_length; | |
357 | if (!cb(s, ss->session_id, &tmp)) { | |
358 | /* The callback failed */ | |
359 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
360 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); | |
361 | SSL_SESSION_free(ss); | |
362 | return (0); | |
363 | } | |
364 | /* | |
365 | * Don't allow the callback to set the session length to zero. nor | |
366 | * set it higher than it was. | |
367 | */ | |
368 | if (!tmp || (tmp > ss->session_id_length)) { | |
369 | /* The callback set an illegal length */ | |
370 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
371 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); | |
372 | SSL_SESSION_free(ss); | |
373 | return (0); | |
374 | } | |
375 | ss->session_id_length = tmp; | |
376 | /* Finally, check for a conflict */ | |
377 | if (SSL_has_matching_session_id(s, ss->session_id, | |
378 | ss->session_id_length)) { | |
379 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); | |
380 | SSL_SESSION_free(ss); | |
381 | return (0); | |
382 | } | |
a13c20f6 | 383 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
384 | sess_id_done: |
385 | if (s->tlsext_hostname) { | |
386 | ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); | |
387 | if (ss->tlsext_hostname == NULL) { | |
388 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
389 | SSL_SESSION_free(ss); | |
390 | return 0; | |
391 | } | |
392 | } | |
a13c20f6 | 393 | #endif |
0f113f3e MC |
394 | } else { |
395 | ss->session_id_length = 0; | |
396 | } | |
397 | ||
398 | if (s->sid_ctx_length > sizeof ss->sid_ctx) { | |
399 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
400 | SSL_SESSION_free(ss); | |
401 | return 0; | |
402 | } | |
403 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
404 | ss->sid_ctx_length = s->sid_ctx_length; | |
405 | s->session = ss; | |
406 | ss->ssl_version = s->version; | |
407 | ss->verify_result = X509_V_OK; | |
408 | ||
409 | return (1); | |
410 | } | |
d02b48c6 | 411 | |
3a83462d MC |
412 | /*- |
413 | * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this | |
c519e89f BM |
414 | * connection. It is only called by servers. |
415 | * | |
416 | * session_id: points at the session ID in the ClientHello. This code will | |
417 | * read past the end of this in order to parse out the session ticket | |
418 | * extension, if any. | |
419 | * len: the length of the session ID. | |
420 | * limit: a pointer to the first byte after the ClientHello. | |
421 | * | |
422 | * Returns: | |
423 | * -1: error | |
424 | * 0: a session may have been found. | |
425 | * | |
426 | * Side effects: | |
427 | * - If a session is found then s->session is pointed at it (after freeing an | |
428 | * existing session if need be) and s->verify_result is set from the session. | |
429 | * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1 | |
430 | * if the server should issue a new session ticket (to 0 otherwise). | |
431 | */ | |
6434abbf | 432 | int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, |
0f113f3e MC |
433 | const unsigned char *limit) |
434 | { | |
435 | /* This is used only by servers. */ | |
b56bce4f | 436 | |
0f113f3e MC |
437 | SSL_SESSION *ret = NULL; |
438 | int fatal = 0; | |
439 | int try_session_cache = 1; | |
6434abbf | 440 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e | 441 | int r; |
6434abbf | 442 | #endif |
d02b48c6 | 443 | |
0f113f3e MC |
444 | if (len > SSL_MAX_SSL_SESSION_ID_LENGTH) |
445 | goto err; | |
c519e89f | 446 | |
0f113f3e MC |
447 | if (len == 0) |
448 | try_session_cache = 0; | |
c519e89f | 449 | |
6434abbf | 450 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
451 | /* sets s->tlsext_ticket_expected */ |
452 | r = tls1_process_ticket(s, session_id, len, limit, &ret); | |
453 | switch (r) { | |
454 | case -1: /* Error during processing */ | |
455 | fatal = 1; | |
456 | goto err; | |
457 | case 0: /* No ticket found */ | |
458 | case 1: /* Zero length ticket found */ | |
459 | break; /* Ok to carry on processing session id. */ | |
460 | case 2: /* Ticket found but not decrypted. */ | |
461 | case 3: /* Ticket decrypted, *ret has been set. */ | |
462 | try_session_cache = 0; | |
463 | break; | |
464 | default: | |
465 | abort(); | |
466 | } | |
6434abbf | 467 | #endif |
c519e89f | 468 | |
0f113f3e MC |
469 | if (try_session_cache && |
470 | ret == NULL && | |
739a5eee | 471 | !(s->session_ctx->session_cache_mode & |
0f113f3e MC |
472 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { |
473 | SSL_SESSION data; | |
474 | data.ssl_version = s->version; | |
475 | data.session_id_length = len; | |
476 | if (len == 0) | |
477 | return 0; | |
478 | memcpy(data.session_id, session_id, len); | |
479 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
480 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); | |
481 | if (ret != NULL) { | |
482 | /* don't allow other threads to steal it: */ | |
483 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
484 | } | |
485 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
486 | if (ret == NULL) | |
487 | s->session_ctx->stats.sess_miss++; | |
488 | } | |
489 | ||
490 | if (try_session_cache && | |
491 | ret == NULL && s->session_ctx->get_session_cb != NULL) { | |
492 | int copy = 1; | |
493 | ||
494 | if ((ret = s->session_ctx->get_session_cb(s, session_id, len, ©))) { | |
495 | s->session_ctx->stats.sess_cb_hit++; | |
496 | ||
497 | /* | |
498 | * Increment reference count now if the session callback asks us | |
499 | * to do so (note that if the session structures returned by the | |
500 | * callback are shared between threads, it must handle the | |
501 | * reference count itself [i.e. copy == 0], or things won't be | |
502 | * thread-safe). | |
503 | */ | |
504 | if (copy) | |
505 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
506 | ||
507 | /* | |
508 | * Add the externally cached session to the internal cache as | |
509 | * well if and only if we are supposed to. | |
510 | */ | |
511 | if (! | |
739a5eee | 512 | (s->session_ctx->session_cache_mode & |
0f113f3e MC |
513 | SSL_SESS_CACHE_NO_INTERNAL_STORE)) |
514 | /* | |
515 | * The following should not return 1, otherwise, things are | |
516 | * very strange | |
517 | */ | |
518 | SSL_CTX_add_session(s->session_ctx, ret); | |
519 | } | |
520 | } | |
521 | ||
522 | if (ret == NULL) | |
523 | goto err; | |
524 | ||
525 | /* Now ret is non-NULL and we own one of its reference counts. */ | |
526 | ||
527 | if (ret->sid_ctx_length != s->sid_ctx_length | |
528 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { | |
529 | /* | |
530 | * We have the session requested by the client, but we don't want to | |
531 | * use it in this context. | |
532 | */ | |
533 | goto err; /* treat like cache miss */ | |
534 | } | |
535 | ||
536 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { | |
537 | /* | |
538 | * We can't be sure if this session is being used out of context, | |
539 | * which is especially important for SSL_VERIFY_PEER. The application | |
540 | * should have used SSL[_CTX]_set_session_id_context. For this error | |
541 | * case, we generate an error instead of treating the event like a | |
542 | * cache miss (otherwise it would be easy for applications to | |
543 | * effectively disable the session cache by accident without anyone | |
544 | * noticing). | |
545 | */ | |
546 | ||
547 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, | |
548 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); | |
549 | fatal = 1; | |
550 | goto err; | |
551 | } | |
552 | ||
553 | if (ret->cipher == NULL) { | |
554 | unsigned char buf[5], *p; | |
555 | unsigned long l; | |
556 | ||
557 | p = buf; | |
558 | l = ret->cipher_id; | |
559 | l2n(l, p); | |
560 | if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR) | |
561 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[2])); | |
562 | else | |
563 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[1])); | |
564 | if (ret->cipher == NULL) | |
565 | goto err; | |
566 | } | |
567 | ||
568 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ | |
569 | s->session_ctx->stats.sess_timeout++; | |
570 | if (try_session_cache) { | |
571 | /* session was from the cache, so remove it */ | |
572 | SSL_CTX_remove_session(s->session_ctx, ret); | |
573 | } | |
574 | goto err; | |
575 | } | |
576 | ||
577 | s->session_ctx->stats.sess_hit++; | |
578 | ||
579 | if (s->session != NULL) | |
580 | SSL_SESSION_free(s->session); | |
581 | s->session = ret; | |
582 | s->verify_result = s->session->verify_result; | |
583 | return 1; | |
8876bc05 BM |
584 | |
585 | err: | |
0f113f3e MC |
586 | if (ret != NULL) { |
587 | SSL_SESSION_free(ret); | |
71fa4513 | 588 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
589 | if (!try_session_cache) { |
590 | /* | |
591 | * The session was from a ticket, so we should issue a ticket for | |
592 | * the new session | |
593 | */ | |
594 | s->tlsext_ticket_expected = 1; | |
595 | } | |
71fa4513 | 596 | #endif |
0f113f3e MC |
597 | } |
598 | if (fatal) | |
599 | return -1; | |
600 | else | |
601 | return 0; | |
602 | } | |
d02b48c6 | 603 | |
6b691a5c | 604 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) |
0f113f3e MC |
605 | { |
606 | int ret = 0; | |
607 | SSL_SESSION *s; | |
608 | ||
609 | /* | |
610 | * add just 1 reference count for the SSL_CTX's session cache even though | |
611 | * it has two ways of access: each session is in a doubly linked list and | |
612 | * an lhash | |
613 | */ | |
614 | CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
615 | /* | |
616 | * if session c is in already in cache, we take back the increment later | |
617 | */ | |
618 | ||
619 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
620 | s = lh_SSL_SESSION_insert(ctx->sessions, c); | |
621 | ||
622 | /* | |
623 | * s != NULL iff we already had a session with the given PID. In this | |
624 | * case, s == c should hold (then we did not really modify | |
625 | * ctx->sessions), or we're in trouble. | |
626 | */ | |
627 | if (s != NULL && s != c) { | |
628 | /* We *are* in trouble ... */ | |
629 | SSL_SESSION_list_remove(ctx, s); | |
630 | SSL_SESSION_free(s); | |
631 | /* | |
632 | * ... so pretend the other session did not exist in cache (we cannot | |
633 | * handle two SSL_SESSION structures with identical session ID in the | |
634 | * same cache, which could happen e.g. when two threads concurrently | |
635 | * obtain the same session from an external cache) | |
636 | */ | |
637 | s = NULL; | |
638 | } | |
639 | ||
640 | /* Put at the head of the queue unless it is already in the cache */ | |
641 | if (s == NULL) | |
642 | SSL_SESSION_list_add(ctx, c); | |
643 | ||
644 | if (s != NULL) { | |
645 | /* | |
646 | * existing cache entry -- decrement previously incremented reference | |
647 | * count because it already takes into account the cache | |
648 | */ | |
649 | ||
650 | SSL_SESSION_free(s); /* s == c */ | |
651 | ret = 0; | |
652 | } else { | |
653 | /* | |
654 | * new cache entry -- remove old ones if cache has become too large | |
655 | */ | |
656 | ||
657 | ret = 1; | |
658 | ||
659 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
660 | while (SSL_CTX_sess_number(ctx) > | |
661 | SSL_CTX_sess_get_cache_size(ctx)) { | |
662 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) | |
663 | break; | |
664 | else | |
665 | ctx->stats.sess_cache_full++; | |
666 | } | |
667 | } | |
668 | } | |
669 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
670 | return (ret); | |
671 | } | |
d02b48c6 | 672 | |
6b691a5c | 673 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) |
801294f8 | 674 | { |
0f113f3e | 675 | return remove_session_lock(ctx, c, 1); |
801294f8 DSH |
676 | } |
677 | ||
0fda2e37 | 678 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) |
0f113f3e MC |
679 | { |
680 | SSL_SESSION *r; | |
681 | int ret = 0; | |
682 | ||
683 | if ((c != NULL) && (c->session_id_length != 0)) { | |
684 | if (lck) | |
685 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
686 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { | |
687 | ret = 1; | |
688 | r = lh_SSL_SESSION_delete(ctx->sessions, c); | |
689 | SSL_SESSION_list_remove(ctx, c); | |
690 | } | |
691 | ||
692 | if (lck) | |
693 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
694 | ||
695 | if (ret) { | |
696 | r->not_resumable = 1; | |
697 | if (ctx->remove_session_cb != NULL) | |
698 | ctx->remove_session_cb(ctx, r); | |
699 | SSL_SESSION_free(r); | |
700 | } | |
701 | } else | |
702 | ret = 0; | |
703 | return (ret); | |
704 | } | |
d02b48c6 | 705 | |
6b691a5c | 706 | void SSL_SESSION_free(SSL_SESSION *ss) |
0f113f3e MC |
707 | { |
708 | int i; | |
d02b48c6 | 709 | |
0f113f3e MC |
710 | if (ss == NULL) |
711 | return; | |
e03ddfae | 712 | |
0f113f3e | 713 | i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); |
58964a49 | 714 | #ifdef REF_PRINT |
0f113f3e | 715 | REF_PRINT("SSL_SESSION", ss); |
58964a49 | 716 | #endif |
0f113f3e MC |
717 | if (i > 0) |
718 | return; | |
d02b48c6 | 719 | #ifdef REF_CHECK |
0f113f3e MC |
720 | if (i < 0) { |
721 | fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); | |
722 | abort(); /* ok */ | |
723 | } | |
d02b48c6 RE |
724 | #endif |
725 | ||
0f113f3e | 726 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
58964a49 | 727 | |
0f113f3e MC |
728 | OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); |
729 | OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); | |
730 | if (ss->sess_cert != NULL) | |
731 | ssl_sess_cert_free(ss->sess_cert); | |
732 | if (ss->peer != NULL) | |
733 | X509_free(ss->peer); | |
734 | if (ss->ciphers != NULL) | |
735 | sk_SSL_CIPHER_free(ss->ciphers); | |
ed3883d2 | 736 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
737 | if (ss->tlsext_hostname != NULL) |
738 | OPENSSL_free(ss->tlsext_hostname); | |
739 | if (ss->tlsext_tick != NULL) | |
740 | OPENSSL_free(ss->tlsext_tick); | |
741 | # ifndef OPENSSL_NO_EC | |
742 | ss->tlsext_ecpointformatlist_length = 0; | |
743 | if (ss->tlsext_ecpointformatlist != NULL) | |
744 | OPENSSL_free(ss->tlsext_ecpointformatlist); | |
745 | ss->tlsext_ellipticcurvelist_length = 0; | |
746 | if (ss->tlsext_ellipticcurvelist != NULL) | |
747 | OPENSSL_free(ss->tlsext_ellipticcurvelist); | |
748 | # endif /* OPENSSL_NO_EC */ | |
ddac1974 NL |
749 | #endif |
750 | #ifndef OPENSSL_NO_PSK | |
0f113f3e MC |
751 | if (ss->psk_identity_hint != NULL) |
752 | OPENSSL_free(ss->psk_identity_hint); | |
753 | if (ss->psk_identity != NULL) | |
754 | OPENSSL_free(ss->psk_identity); | |
edc032b5 BL |
755 | #endif |
756 | #ifndef OPENSSL_NO_SRP | |
0f113f3e MC |
757 | if (ss->srp_username != NULL) |
758 | OPENSSL_free(ss->srp_username); | |
ed3883d2 | 759 | #endif |
0f113f3e MC |
760 | OPENSSL_cleanse(ss, sizeof(*ss)); |
761 | OPENSSL_free(ss); | |
762 | } | |
d02b48c6 | 763 | |
6b691a5c | 764 | int SSL_set_session(SSL *s, SSL_SESSION *session) |
0f113f3e MC |
765 | { |
766 | int ret = 0; | |
767 | const SSL_METHOD *meth; | |
768 | ||
769 | if (session != NULL) { | |
770 | meth = s->ctx->method->get_ssl_method(session->ssl_version); | |
771 | if (meth == NULL) | |
772 | meth = s->method->get_ssl_method(session->ssl_version); | |
773 | if (meth == NULL) { | |
774 | SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); | |
775 | return (0); | |
776 | } | |
777 | ||
778 | if (meth != s->method) { | |
779 | if (!SSL_set_ssl_method(s, meth)) | |
780 | return (0); | |
781 | } | |
882e8912 | 782 | #ifndef OPENSSL_NO_KRB5 |
0f113f3e MC |
783 | if (s->kssl_ctx && !s->kssl_ctx->client_princ && |
784 | session->krb5_client_princ_len > 0) { | |
785 | s->kssl_ctx->client_princ = | |
786 | (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); | |
787 | if (s->kssl_ctx->client_princ == NULL) { | |
788 | SSLerr(SSL_F_SSL_SET_SESSION, ERR_R_MALLOC_FAILURE); | |
789 | return (0); | |
790 | } | |
791 | memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, | |
792 | session->krb5_client_princ_len); | |
793 | s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; | |
794 | } | |
795 | #endif /* OPENSSL_NO_KRB5 */ | |
796 | ||
797 | /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ | |
798 | CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
799 | if (s->session != NULL) | |
800 | SSL_SESSION_free(s->session); | |
801 | s->session = session; | |
802 | s->verify_result = s->session->verify_result; | |
803 | /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ | |
804 | ret = 1; | |
805 | } else { | |
806 | if (s->session != NULL) { | |
807 | SSL_SESSION_free(s->session); | |
808 | s->session = NULL; | |
809 | } | |
810 | ||
811 | meth = s->ctx->method; | |
812 | if (meth != s->method) { | |
813 | if (!SSL_set_ssl_method(s, meth)) | |
814 | return (0); | |
815 | } | |
816 | ret = 1; | |
817 | } | |
818 | return (ret); | |
819 | } | |
d02b48c6 | 820 | |
6b691a5c | 821 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) |
0f113f3e MC |
822 | { |
823 | if (s == NULL) | |
824 | return (0); | |
825 | s->timeout = t; | |
826 | return (1); | |
827 | } | |
d02b48c6 | 828 | |
0821bcd4 | 829 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) |
0f113f3e MC |
830 | { |
831 | if (s == NULL) | |
832 | return (0); | |
833 | return (s->timeout); | |
834 | } | |
d02b48c6 | 835 | |
0821bcd4 | 836 | long SSL_SESSION_get_time(const SSL_SESSION *s) |
0f113f3e MC |
837 | { |
838 | if (s == NULL) | |
839 | return (0); | |
840 | return (s->time); | |
841 | } | |
d02b48c6 | 842 | |
6b691a5c | 843 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) |
0f113f3e MC |
844 | { |
845 | if (s == NULL) | |
846 | return (0); | |
847 | s->time = t; | |
848 | return (t); | |
849 | } | |
d02b48c6 | 850 | |
f2baac27 MC |
851 | int SSL_SESSION_has_ticket(const SSL_SESSION *s) |
852 | { | |
853 | return (s->tlsext_ticklen > 0) ? 1 : 0; | |
854 | } | |
855 | ||
856 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) | |
857 | { | |
858 | return s->tlsext_tick_lifetime_hint; | |
859 | } | |
860 | ||
08557cf2 | 861 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) |
0f113f3e MC |
862 | { |
863 | return s->peer; | |
864 | } | |
865 | ||
866 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, | |
867 | unsigned int sid_ctx_len) | |
868 | { | |
869 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
870 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, | |
871 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
872 | return 0; | |
873 | } | |
874 | s->sid_ctx_length = sid_ctx_len; | |
875 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); | |
876 | ||
877 | return 1; | |
878 | } | |
08557cf2 | 879 | |
6b691a5c | 880 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) |
0f113f3e MC |
881 | { |
882 | long l; | |
883 | if (s == NULL) | |
884 | return (0); | |
885 | l = s->session_timeout; | |
886 | s->session_timeout = t; | |
887 | return (l); | |
888 | } | |
413c4f45 | 889 | |
0821bcd4 | 890 | long SSL_CTX_get_timeout(const SSL_CTX *s) |
0f113f3e MC |
891 | { |
892 | if (s == NULL) | |
893 | return (0); | |
894 | return (s->session_timeout); | |
895 | } | |
413c4f45 | 896 | |
12bf56c0 | 897 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
898 | int SSL_set_session_secret_cb(SSL *s, |
899 | int (*tls_session_secret_cb) (SSL *s, | |
900 | void *secret, | |
901 | int *secret_len, | |
902 | STACK_OF(SSL_CIPHER) | |
903 | *peer_ciphers, | |
904 | SSL_CIPHER | |
905 | **cipher, | |
906 | void *arg), | |
907 | void *arg) | |
908 | { | |
909 | if (s == NULL) | |
910 | return (0); | |
911 | s->tls_session_secret_cb = tls_session_secret_cb; | |
912 | s->tls_session_secret_cb_arg = arg; | |
913 | return (1); | |
914 | } | |
12bf56c0 DSH |
915 | |
916 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, | |
0f113f3e MC |
917 | void *arg) |
918 | { | |
919 | if (s == NULL) | |
920 | return (0); | |
921 | s->tls_session_ticket_ext_cb = cb; | |
922 | s->tls_session_ticket_ext_cb_arg = arg; | |
923 | return (1); | |
924 | } | |
12bf56c0 DSH |
925 | |
926 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) | |
0f113f3e MC |
927 | { |
928 | if (s->version >= TLS1_VERSION) { | |
929 | if (s->tlsext_session_ticket) { | |
930 | OPENSSL_free(s->tlsext_session_ticket); | |
931 | s->tlsext_session_ticket = NULL; | |
932 | } | |
933 | ||
934 | s->tlsext_session_ticket = | |
935 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); | |
936 | if (!s->tlsext_session_ticket) { | |
937 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); | |
938 | return 0; | |
939 | } | |
940 | ||
941 | if (ext_data) { | |
942 | s->tlsext_session_ticket->length = ext_len; | |
943 | s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; | |
944 | memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); | |
945 | } else { | |
946 | s->tlsext_session_ticket->length = 0; | |
947 | s->tlsext_session_ticket->data = NULL; | |
948 | } | |
949 | ||
950 | return 1; | |
951 | } | |
952 | ||
953 | return 0; | |
954 | } | |
955 | #endif /* OPENSSL_NO_TLSEXT */ | |
956 | ||
957 | typedef struct timeout_param_st { | |
958 | SSL_CTX *ctx; | |
959 | long time; | |
960 | LHASH_OF(SSL_SESSION) *cache; | |
961 | } TIMEOUT_PARAM; | |
d02b48c6 | 962 | |
3c1d6bbc | 963 | static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) |
0f113f3e MC |
964 | { |
965 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
966 | /* | |
967 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
968 | * locking overhead | |
969 | */ | |
970 | (void)lh_SSL_SESSION_delete(p->cache, s); | |
971 | SSL_SESSION_list_remove(p->ctx, s); | |
972 | s->not_resumable = 1; | |
973 | if (p->ctx->remove_session_cb != NULL) | |
974 | p->ctx->remove_session_cb(p->ctx, s); | |
975 | SSL_SESSION_free(s); | |
976 | } | |
977 | } | |
d02b48c6 | 978 | |
3c1d6bbc | 979 | static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM) |
3c914840 | 980 | |
6b691a5c | 981 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) |
0f113f3e MC |
982 | { |
983 | unsigned long i; | |
984 | TIMEOUT_PARAM tp; | |
985 | ||
986 | tp.ctx = s; | |
987 | tp.cache = s->sessions; | |
988 | if (tp.cache == NULL) | |
989 | return; | |
990 | tp.time = t; | |
991 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
992 | i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; | |
993 | CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; | |
994 | lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), | |
995 | TIMEOUT_PARAM, &tp); | |
996 | CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; | |
997 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
998 | } | |
d02b48c6 | 999 | |
6b691a5c | 1000 | int ssl_clear_bad_session(SSL *s) |
0f113f3e MC |
1001 | { |
1002 | if ((s->session != NULL) && | |
1003 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
1004 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
1005 | SSL_CTX_remove_session(s->ctx, s->session); | |
1006 | return (1); | |
1007 | } else | |
1008 | return (0); | |
1009 | } | |
58964a49 RE |
1010 | |
1011 | /* locked by SSL_CTX in the calling function */ | |
6b691a5c | 1012 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1013 | { |
1014 | if ((s->next == NULL) || (s->prev == NULL)) | |
1015 | return; | |
1016 | ||
1017 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
1018 | /* last element in list */ | |
1019 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1020 | /* only one element in list */ | |
1021 | ctx->session_cache_head = NULL; | |
1022 | ctx->session_cache_tail = NULL; | |
1023 | } else { | |
1024 | ctx->session_cache_tail = s->prev; | |
1025 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1026 | } | |
1027 | } else { | |
1028 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1029 | /* first element in list */ | |
1030 | ctx->session_cache_head = s->next; | |
1031 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1032 | } else { | |
1033 | /* middle of list */ | |
1034 | s->next->prev = s->prev; | |
1035 | s->prev->next = s->next; | |
1036 | } | |
1037 | } | |
1038 | s->prev = s->next = NULL; | |
1039 | } | |
58964a49 | 1040 | |
6b691a5c | 1041 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1042 | { |
1043 | if ((s->next != NULL) && (s->prev != NULL)) | |
1044 | SSL_SESSION_list_remove(ctx, s); | |
1045 | ||
1046 | if (ctx->session_cache_head == NULL) { | |
1047 | ctx->session_cache_head = s; | |
1048 | ctx->session_cache_tail = s; | |
1049 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1050 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1051 | } else { | |
1052 | s->next = ctx->session_cache_head; | |
1053 | s->next->prev = s; | |
1054 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1055 | ctx->session_cache_head = s; | |
1056 | } | |
1057 | } | |
58964a49 | 1058 | |
7806f3dd | 1059 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
0f113f3e MC |
1060 | int (*cb) (struct ssl_st *ssl, |
1061 | SSL_SESSION *sess)) | |
1062 | { | |
1063 | ctx->new_session_cb = cb; | |
1064 | } | |
7806f3dd | 1065 | |
0f113f3e MC |
1066 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { |
1067 | return ctx->new_session_cb; | |
1068 | } | |
7806f3dd NL |
1069 | |
1070 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1071 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) |
1072 | { | |
1073 | ctx->remove_session_cb = cb; | |
1074 | } | |
7806f3dd | 1075 | |
0f113f3e MC |
1076 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, |
1077 | SSL_SESSION *sess) { | |
1078 | return ctx->remove_session_cb; | |
1079 | } | |
7806f3dd NL |
1080 | |
1081 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1082 | SSL_SESSION *(*cb) (struct ssl_st *ssl, |
1083 | unsigned char *data, int len, | |
1084 | int *copy)) | |
1085 | { | |
1086 | ctx->get_session_cb = cb; | |
1087 | } | |
1088 | ||
1089 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
1090 | unsigned char *data, | |
1091 | int len, int *copy) { | |
1092 | return ctx->get_session_cb; | |
1093 | } | |
1094 | ||
1095 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
1096 | void (*cb) (const SSL *ssl, int type, int val)) | |
1097 | { | |
1098 | ctx->info_callback = cb; | |
1099 | } | |
1100 | ||
1101 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
1102 | int val) { | |
1103 | return ctx->info_callback; | |
1104 | } | |
7806f3dd NL |
1105 | |
1106 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1107 | int (*cb) (SSL *ssl, X509 **x509, |
1108 | EVP_PKEY **pkey)) | |
1109 | { | |
1110 | ctx->client_cert_cb = cb; | |
1111 | } | |
7806f3dd | 1112 | |
0f113f3e MC |
1113 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, |
1114 | EVP_PKEY **pkey) { | |
1115 | return ctx->client_cert_cb; | |
1116 | } | |
7806f3dd | 1117 | |
368888bc DSH |
1118 | #ifndef OPENSSL_NO_ENGINE |
1119 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
0f113f3e MC |
1120 | { |
1121 | if (!ENGINE_init(e)) { | |
1122 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
1123 | return 0; | |
1124 | } | |
1125 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
1126 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
1127 | SSL_R_NO_CLIENT_CERT_METHOD); | |
1128 | ENGINE_finish(e); | |
1129 | return 0; | |
1130 | } | |
1131 | ctx->client_cert_engine = e; | |
1132 | return 1; | |
1133 | } | |
368888bc DSH |
1134 | #endif |
1135 | ||
7806f3dd | 1136 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, |
0f113f3e MC |
1137 | int (*cb) (SSL *ssl, |
1138 | unsigned char *cookie, | |
1139 | unsigned int *cookie_len)) | |
1140 | { | |
1141 | ctx->app_gen_cookie_cb = cb; | |
1142 | } | |
7806f3dd NL |
1143 | |
1144 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1145 | int (*cb) (SSL *ssl, unsigned char *cookie, |
1146 | unsigned int cookie_len)) | |
1147 | { | |
1148 | ctx->app_verify_cookie_cb = cb; | |
1149 | } | |
7806f3dd | 1150 | |
0f113f3e MC |
1151 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, |
1152 | SSL_SESSION) |