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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 | ||
b196e7d9 | 196 | ss = OPENSSL_malloc(sizeof(SSL_SESSION)); |
0f113f3e MC |
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 | |
266483d2 | 260 | if (RAND_bytes(id, *id_len) <= 0) |
0f113f3e MC |
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 | ||
62adbcee RS |
295 | SSL_SESSION_free(s->session); |
296 | s->session = NULL; | |
0f113f3e MC |
297 | |
298 | if (session) { | |
299 | if (s->version == SSL3_VERSION) { | |
300 | ss->ssl_version = SSL3_VERSION; | |
301 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
302 | } else if (s->version == TLS1_VERSION) { | |
303 | ss->ssl_version = TLS1_VERSION; | |
304 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
305 | } else if (s->version == TLS1_1_VERSION) { | |
306 | ss->ssl_version = TLS1_1_VERSION; | |
307 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
308 | } else if (s->version == TLS1_2_VERSION) { | |
309 | ss->ssl_version = TLS1_2_VERSION; | |
310 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
311 | } else if (s->version == DTLS1_BAD_VER) { | |
312 | ss->ssl_version = DTLS1_BAD_VER; | |
313 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
314 | } else if (s->version == DTLS1_VERSION) { | |
315 | ss->ssl_version = DTLS1_VERSION; | |
316 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
317 | } else if (s->version == DTLS1_2_VERSION) { | |
318 | ss->ssl_version = DTLS1_2_VERSION; | |
319 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; | |
320 | } else { | |
321 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); | |
322 | SSL_SESSION_free(ss); | |
323 | return (0); | |
324 | } | |
6434abbf | 325 | #ifndef OPENSSL_NO_TLSEXT |
35a1cc90 MC |
326 | /*- |
327 | * If RFC5077 ticket, use empty session ID (as server). | |
328 | * Note that: | |
329 | * (a) ssl_get_prev_session() does lookahead into the | |
330 | * ClientHello extensions to find the session ticket. | |
331 | * When ssl_get_prev_session() fails, s3_srvr.c calls | |
332 | * ssl_get_new_session() in ssl3_get_client_hello(). | |
333 | * At that point, it has not yet parsed the extensions, | |
334 | * however, because of the lookahead, it already knows | |
335 | * whether a ticket is expected or not. | |
336 | * | |
337 | * (b) s3_clnt.c calls ssl_get_new_session() before parsing | |
338 | * ServerHello extensions, and before recording the session | |
339 | * ID received from the server, so this block is a noop. | |
340 | */ | |
0f113f3e MC |
341 | if (s->tlsext_ticket_expected) { |
342 | ss->session_id_length = 0; | |
343 | goto sess_id_done; | |
344 | } | |
6434abbf | 345 | #endif |
0f113f3e MC |
346 | /* Choose which callback will set the session ID */ |
347 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
348 | if (s->generate_session_id) | |
349 | cb = s->generate_session_id; | |
350 | else if (s->session_ctx->generate_session_id) | |
351 | cb = s->session_ctx->generate_session_id; | |
352 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
353 | /* Choose a session ID */ | |
354 | tmp = ss->session_id_length; | |
355 | if (!cb(s, ss->session_id, &tmp)) { | |
356 | /* The callback failed */ | |
357 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
358 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); | |
359 | SSL_SESSION_free(ss); | |
360 | return (0); | |
361 | } | |
362 | /* | |
363 | * Don't allow the callback to set the session length to zero. nor | |
364 | * set it higher than it was. | |
365 | */ | |
366 | if (!tmp || (tmp > ss->session_id_length)) { | |
367 | /* The callback set an illegal length */ | |
368 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, | |
369 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); | |
370 | SSL_SESSION_free(ss); | |
371 | return (0); | |
372 | } | |
373 | ss->session_id_length = tmp; | |
374 | /* Finally, check for a conflict */ | |
375 | if (SSL_has_matching_session_id(s, ss->session_id, | |
376 | ss->session_id_length)) { | |
377 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); | |
378 | SSL_SESSION_free(ss); | |
379 | return (0); | |
380 | } | |
a13c20f6 | 381 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
382 | sess_id_done: |
383 | if (s->tlsext_hostname) { | |
384 | ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); | |
385 | if (ss->tlsext_hostname == NULL) { | |
386 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
387 | SSL_SESSION_free(ss); | |
388 | return 0; | |
389 | } | |
390 | } | |
a13c20f6 | 391 | #endif |
0f113f3e MC |
392 | } else { |
393 | ss->session_id_length = 0; | |
394 | } | |
395 | ||
396 | if (s->sid_ctx_length > sizeof ss->sid_ctx) { | |
397 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); | |
398 | SSL_SESSION_free(ss); | |
399 | return 0; | |
400 | } | |
401 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); | |
402 | ss->sid_ctx_length = s->sid_ctx_length; | |
403 | s->session = ss; | |
404 | ss->ssl_version = s->version; | |
405 | ss->verify_result = X509_V_OK; | |
406 | ||
407 | return (1); | |
408 | } | |
d02b48c6 | 409 | |
3a83462d MC |
410 | /*- |
411 | * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this | |
c519e89f BM |
412 | * connection. It is only called by servers. |
413 | * | |
414 | * session_id: points at the session ID in the ClientHello. This code will | |
415 | * read past the end of this in order to parse out the session ticket | |
416 | * extension, if any. | |
417 | * len: the length of the session ID. | |
418 | * limit: a pointer to the first byte after the ClientHello. | |
419 | * | |
420 | * Returns: | |
421 | * -1: error | |
422 | * 0: a session may have been found. | |
423 | * | |
424 | * Side effects: | |
425 | * - If a session is found then s->session is pointed at it (after freeing an | |
426 | * existing session if need be) and s->verify_result is set from the session. | |
427 | * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1 | |
428 | * if the server should issue a new session ticket (to 0 otherwise). | |
429 | */ | |
6434abbf | 430 | int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, |
0f113f3e MC |
431 | const unsigned char *limit) |
432 | { | |
433 | /* This is used only by servers. */ | |
b56bce4f | 434 | |
0f113f3e MC |
435 | SSL_SESSION *ret = NULL; |
436 | int fatal = 0; | |
437 | int try_session_cache = 1; | |
6434abbf | 438 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e | 439 | int r; |
6434abbf | 440 | #endif |
d02b48c6 | 441 | |
0f113f3e MC |
442 | if (len > SSL_MAX_SSL_SESSION_ID_LENGTH) |
443 | goto err; | |
c519e89f | 444 | |
5e0a80c1 MC |
445 | if (session_id + len > limit) { |
446 | fatal = 1; | |
447 | goto err; | |
448 | } | |
449 | ||
0f113f3e MC |
450 | if (len == 0) |
451 | try_session_cache = 0; | |
c519e89f | 452 | |
6434abbf | 453 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
454 | /* sets s->tlsext_ticket_expected */ |
455 | r = tls1_process_ticket(s, session_id, len, limit, &ret); | |
456 | switch (r) { | |
457 | case -1: /* Error during processing */ | |
458 | fatal = 1; | |
459 | goto err; | |
460 | case 0: /* No ticket found */ | |
461 | case 1: /* Zero length ticket found */ | |
462 | break; /* Ok to carry on processing session id. */ | |
463 | case 2: /* Ticket found but not decrypted. */ | |
464 | case 3: /* Ticket decrypted, *ret has been set. */ | |
465 | try_session_cache = 0; | |
466 | break; | |
467 | default: | |
468 | abort(); | |
469 | } | |
6434abbf | 470 | #endif |
c519e89f | 471 | |
0f113f3e MC |
472 | if (try_session_cache && |
473 | ret == NULL && | |
739a5eee | 474 | !(s->session_ctx->session_cache_mode & |
0f113f3e MC |
475 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { |
476 | SSL_SESSION data; | |
477 | data.ssl_version = s->version; | |
478 | data.session_id_length = len; | |
479 | if (len == 0) | |
480 | return 0; | |
481 | memcpy(data.session_id, session_id, len); | |
482 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
483 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); | |
484 | if (ret != NULL) { | |
485 | /* don't allow other threads to steal it: */ | |
486 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
487 | } | |
488 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
489 | if (ret == NULL) | |
490 | s->session_ctx->stats.sess_miss++; | |
491 | } | |
492 | ||
493 | if (try_session_cache && | |
494 | ret == NULL && s->session_ctx->get_session_cb != NULL) { | |
495 | int copy = 1; | |
496 | ||
497 | if ((ret = s->session_ctx->get_session_cb(s, session_id, len, ©))) { | |
498 | s->session_ctx->stats.sess_cb_hit++; | |
499 | ||
500 | /* | |
501 | * Increment reference count now if the session callback asks us | |
502 | * to do so (note that if the session structures returned by the | |
503 | * callback are shared between threads, it must handle the | |
504 | * reference count itself [i.e. copy == 0], or things won't be | |
505 | * thread-safe). | |
506 | */ | |
507 | if (copy) | |
508 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
509 | ||
510 | /* | |
511 | * Add the externally cached session to the internal cache as | |
512 | * well if and only if we are supposed to. | |
513 | */ | |
514 | if (! | |
739a5eee | 515 | (s->session_ctx->session_cache_mode & |
69f68237 | 516 | SSL_SESS_CACHE_NO_INTERNAL_STORE)) { |
0f113f3e MC |
517 | /* |
518 | * The following should not return 1, otherwise, things are | |
519 | * very strange | |
520 | */ | |
61986d32 | 521 | if (SSL_CTX_add_session(s->session_ctx, ret)) |
69f68237 MC |
522 | goto err; |
523 | } | |
0f113f3e MC |
524 | } |
525 | } | |
526 | ||
527 | if (ret == NULL) | |
528 | goto err; | |
529 | ||
530 | /* Now ret is non-NULL and we own one of its reference counts. */ | |
531 | ||
532 | if (ret->sid_ctx_length != s->sid_ctx_length | |
533 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { | |
534 | /* | |
535 | * We have the session requested by the client, but we don't want to | |
536 | * use it in this context. | |
537 | */ | |
538 | goto err; /* treat like cache miss */ | |
539 | } | |
540 | ||
541 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { | |
542 | /* | |
543 | * We can't be sure if this session is being used out of context, | |
544 | * which is especially important for SSL_VERIFY_PEER. The application | |
545 | * should have used SSL[_CTX]_set_session_id_context. For this error | |
546 | * case, we generate an error instead of treating the event like a | |
547 | * cache miss (otherwise it would be easy for applications to | |
548 | * effectively disable the session cache by accident without anyone | |
549 | * noticing). | |
550 | */ | |
551 | ||
552 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, | |
553 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); | |
554 | fatal = 1; | |
555 | goto err; | |
556 | } | |
557 | ||
558 | if (ret->cipher == NULL) { | |
559 | unsigned char buf[5], *p; | |
560 | unsigned long l; | |
561 | ||
562 | p = buf; | |
563 | l = ret->cipher_id; | |
564 | l2n(l, p); | |
565 | if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR) | |
566 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[2])); | |
567 | else | |
568 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[1])); | |
569 | if (ret->cipher == NULL) | |
570 | goto err; | |
571 | } | |
572 | ||
573 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ | |
574 | s->session_ctx->stats.sess_timeout++; | |
575 | if (try_session_cache) { | |
576 | /* session was from the cache, so remove it */ | |
577 | SSL_CTX_remove_session(s->session_ctx, ret); | |
578 | } | |
579 | goto err; | |
580 | } | |
581 | ||
582 | s->session_ctx->stats.sess_hit++; | |
583 | ||
62adbcee | 584 | SSL_SESSION_free(s->session); |
0f113f3e MC |
585 | s->session = ret; |
586 | s->verify_result = s->session->verify_result; | |
587 | return 1; | |
8876bc05 BM |
588 | |
589 | err: | |
0f113f3e MC |
590 | if (ret != NULL) { |
591 | SSL_SESSION_free(ret); | |
71fa4513 | 592 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
593 | if (!try_session_cache) { |
594 | /* | |
595 | * The session was from a ticket, so we should issue a ticket for | |
596 | * the new session | |
597 | */ | |
598 | s->tlsext_ticket_expected = 1; | |
599 | } | |
71fa4513 | 600 | #endif |
0f113f3e MC |
601 | } |
602 | if (fatal) | |
603 | return -1; | |
604 | else | |
605 | return 0; | |
606 | } | |
d02b48c6 | 607 | |
6b691a5c | 608 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) |
0f113f3e MC |
609 | { |
610 | int ret = 0; | |
611 | SSL_SESSION *s; | |
612 | ||
613 | /* | |
614 | * add just 1 reference count for the SSL_CTX's session cache even though | |
615 | * it has two ways of access: each session is in a doubly linked list and | |
616 | * an lhash | |
617 | */ | |
618 | CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
619 | /* | |
620 | * if session c is in already in cache, we take back the increment later | |
621 | */ | |
622 | ||
623 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
624 | s = lh_SSL_SESSION_insert(ctx->sessions, c); | |
625 | ||
626 | /* | |
627 | * s != NULL iff we already had a session with the given PID. In this | |
628 | * case, s == c should hold (then we did not really modify | |
629 | * ctx->sessions), or we're in trouble. | |
630 | */ | |
631 | if (s != NULL && s != c) { | |
632 | /* We *are* in trouble ... */ | |
633 | SSL_SESSION_list_remove(ctx, s); | |
634 | SSL_SESSION_free(s); | |
635 | /* | |
636 | * ... so pretend the other session did not exist in cache (we cannot | |
637 | * handle two SSL_SESSION structures with identical session ID in the | |
638 | * same cache, which could happen e.g. when two threads concurrently | |
639 | * obtain the same session from an external cache) | |
640 | */ | |
641 | s = NULL; | |
642 | } | |
643 | ||
644 | /* Put at the head of the queue unless it is already in the cache */ | |
645 | if (s == NULL) | |
646 | SSL_SESSION_list_add(ctx, c); | |
647 | ||
648 | if (s != NULL) { | |
649 | /* | |
650 | * existing cache entry -- decrement previously incremented reference | |
651 | * count because it already takes into account the cache | |
652 | */ | |
653 | ||
654 | SSL_SESSION_free(s); /* s == c */ | |
655 | ret = 0; | |
656 | } else { | |
657 | /* | |
658 | * new cache entry -- remove old ones if cache has become too large | |
659 | */ | |
660 | ||
661 | ret = 1; | |
662 | ||
663 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
664 | while (SSL_CTX_sess_number(ctx) > | |
665 | SSL_CTX_sess_get_cache_size(ctx)) { | |
666 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) | |
667 | break; | |
668 | else | |
669 | ctx->stats.sess_cache_full++; | |
670 | } | |
671 | } | |
672 | } | |
673 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
674 | return (ret); | |
675 | } | |
d02b48c6 | 676 | |
6b691a5c | 677 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) |
801294f8 | 678 | { |
0f113f3e | 679 | return remove_session_lock(ctx, c, 1); |
801294f8 DSH |
680 | } |
681 | ||
0fda2e37 | 682 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) |
0f113f3e MC |
683 | { |
684 | SSL_SESSION *r; | |
685 | int ret = 0; | |
686 | ||
687 | if ((c != NULL) && (c->session_id_length != 0)) { | |
688 | if (lck) | |
689 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
690 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { | |
691 | ret = 1; | |
692 | r = lh_SSL_SESSION_delete(ctx->sessions, c); | |
693 | SSL_SESSION_list_remove(ctx, c); | |
694 | } | |
695 | ||
696 | if (lck) | |
697 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
698 | ||
699 | if (ret) { | |
700 | r->not_resumable = 1; | |
701 | if (ctx->remove_session_cb != NULL) | |
702 | ctx->remove_session_cb(ctx, r); | |
703 | SSL_SESSION_free(r); | |
704 | } | |
705 | } else | |
706 | ret = 0; | |
707 | return (ret); | |
708 | } | |
d02b48c6 | 709 | |
6b691a5c | 710 | void SSL_SESSION_free(SSL_SESSION *ss) |
0f113f3e MC |
711 | { |
712 | int i; | |
d02b48c6 | 713 | |
0f113f3e MC |
714 | if (ss == NULL) |
715 | return; | |
e03ddfae | 716 | |
0f113f3e | 717 | i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); |
58964a49 | 718 | #ifdef REF_PRINT |
0f113f3e | 719 | REF_PRINT("SSL_SESSION", ss); |
58964a49 | 720 | #endif |
0f113f3e MC |
721 | if (i > 0) |
722 | return; | |
d02b48c6 | 723 | #ifdef REF_CHECK |
0f113f3e MC |
724 | if (i < 0) { |
725 | fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); | |
726 | abort(); /* ok */ | |
727 | } | |
d02b48c6 RE |
728 | #endif |
729 | ||
0f113f3e | 730 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
58964a49 | 731 | |
0f113f3e MC |
732 | OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); |
733 | OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); | |
e0e920b1 | 734 | ssl_sess_cert_free(ss->sess_cert); |
222561fe | 735 | X509_free(ss->peer); |
0f113f3e MC |
736 | if (ss->ciphers != NULL) |
737 | sk_SSL_CIPHER_free(ss->ciphers); | |
ed3883d2 | 738 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
739 | if (ss->tlsext_hostname != NULL) |
740 | OPENSSL_free(ss->tlsext_hostname); | |
741 | if (ss->tlsext_tick != NULL) | |
742 | OPENSSL_free(ss->tlsext_tick); | |
743 | # ifndef OPENSSL_NO_EC | |
744 | ss->tlsext_ecpointformatlist_length = 0; | |
745 | if (ss->tlsext_ecpointformatlist != NULL) | |
746 | OPENSSL_free(ss->tlsext_ecpointformatlist); | |
747 | ss->tlsext_ellipticcurvelist_length = 0; | |
748 | if (ss->tlsext_ellipticcurvelist != NULL) | |
749 | OPENSSL_free(ss->tlsext_ellipticcurvelist); | |
750 | # endif /* OPENSSL_NO_EC */ | |
ddac1974 NL |
751 | #endif |
752 | #ifndef OPENSSL_NO_PSK | |
0f113f3e MC |
753 | if (ss->psk_identity_hint != NULL) |
754 | OPENSSL_free(ss->psk_identity_hint); | |
755 | if (ss->psk_identity != NULL) | |
756 | OPENSSL_free(ss->psk_identity); | |
edc032b5 BL |
757 | #endif |
758 | #ifndef OPENSSL_NO_SRP | |
0f113f3e MC |
759 | if (ss->srp_username != NULL) |
760 | OPENSSL_free(ss->srp_username); | |
ed3883d2 | 761 | #endif |
0f113f3e MC |
762 | OPENSSL_cleanse(ss, sizeof(*ss)); |
763 | OPENSSL_free(ss); | |
764 | } | |
d02b48c6 | 765 | |
6b691a5c | 766 | int SSL_set_session(SSL *s, SSL_SESSION *session) |
0f113f3e MC |
767 | { |
768 | int ret = 0; | |
769 | const SSL_METHOD *meth; | |
770 | ||
771 | if (session != NULL) { | |
772 | meth = s->ctx->method->get_ssl_method(session->ssl_version); | |
773 | if (meth == NULL) | |
774 | meth = s->method->get_ssl_method(session->ssl_version); | |
775 | if (meth == NULL) { | |
776 | SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); | |
777 | return (0); | |
778 | } | |
779 | ||
780 | if (meth != s->method) { | |
781 | if (!SSL_set_ssl_method(s, meth)) | |
782 | return (0); | |
783 | } | |
882e8912 | 784 | #ifndef OPENSSL_NO_KRB5 |
0f113f3e MC |
785 | if (s->kssl_ctx && !s->kssl_ctx->client_princ && |
786 | session->krb5_client_princ_len > 0) { | |
787 | s->kssl_ctx->client_princ = | |
b196e7d9 | 788 | OPENSSL_malloc(session->krb5_client_princ_len + 1); |
0f113f3e MC |
789 | if (s->kssl_ctx->client_princ == NULL) { |
790 | SSLerr(SSL_F_SSL_SET_SESSION, ERR_R_MALLOC_FAILURE); | |
791 | return (0); | |
792 | } | |
793 | memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, | |
794 | session->krb5_client_princ_len); | |
795 | s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; | |
796 | } | |
797 | #endif /* OPENSSL_NO_KRB5 */ | |
798 | ||
799 | /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ | |
800 | CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
e0e920b1 | 801 | SSL_SESSION_free(s->session); |
0f113f3e MC |
802 | s->session = session; |
803 | s->verify_result = s->session->verify_result; | |
804 | /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ | |
805 | ret = 1; | |
806 | } else { | |
e0e920b1 RS |
807 | SSL_SESSION_free(s->session); |
808 | s->session = NULL; | |
0f113f3e MC |
809 | meth = s->ctx->method; |
810 | if (meth != s->method) { | |
811 | if (!SSL_set_ssl_method(s, meth)) | |
812 | return (0); | |
813 | } | |
814 | ret = 1; | |
815 | } | |
816 | return (ret); | |
817 | } | |
d02b48c6 | 818 | |
6b691a5c | 819 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) |
0f113f3e MC |
820 | { |
821 | if (s == NULL) | |
822 | return (0); | |
823 | s->timeout = t; | |
824 | return (1); | |
825 | } | |
d02b48c6 | 826 | |
0821bcd4 | 827 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) |
0f113f3e MC |
828 | { |
829 | if (s == NULL) | |
830 | return (0); | |
831 | return (s->timeout); | |
832 | } | |
d02b48c6 | 833 | |
0821bcd4 | 834 | long SSL_SESSION_get_time(const SSL_SESSION *s) |
0f113f3e MC |
835 | { |
836 | if (s == NULL) | |
837 | return (0); | |
838 | return (s->time); | |
839 | } | |
d02b48c6 | 840 | |
6b691a5c | 841 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) |
0f113f3e MC |
842 | { |
843 | if (s == NULL) | |
844 | return (0); | |
845 | s->time = t; | |
846 | return (t); | |
847 | } | |
d02b48c6 | 848 | |
f2baac27 MC |
849 | int SSL_SESSION_has_ticket(const SSL_SESSION *s) |
850 | { | |
851 | return (s->tlsext_ticklen > 0) ? 1 : 0; | |
852 | } | |
853 | ||
854 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) | |
855 | { | |
856 | return s->tlsext_tick_lifetime_hint; | |
857 | } | |
858 | ||
b7c9187b MC |
859 | void SSL_SESSION_get0_ticket(const SSL_SESSION *s, unsigned char **tick, |
860 | size_t *len) | |
861 | { | |
862 | *len = s->tlsext_ticklen; | |
61986d32 | 863 | if (tick != NULL) |
b7c9187b MC |
864 | *tick = s->tlsext_tick; |
865 | } | |
866 | ||
08557cf2 | 867 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) |
0f113f3e MC |
868 | { |
869 | return s->peer; | |
870 | } | |
871 | ||
872 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, | |
873 | unsigned int sid_ctx_len) | |
874 | { | |
875 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
876 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, | |
877 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
878 | return 0; | |
879 | } | |
880 | s->sid_ctx_length = sid_ctx_len; | |
881 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); | |
882 | ||
883 | return 1; | |
884 | } | |
08557cf2 | 885 | |
6b691a5c | 886 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) |
0f113f3e MC |
887 | { |
888 | long l; | |
889 | if (s == NULL) | |
890 | return (0); | |
891 | l = s->session_timeout; | |
892 | s->session_timeout = t; | |
893 | return (l); | |
894 | } | |
413c4f45 | 895 | |
0821bcd4 | 896 | long SSL_CTX_get_timeout(const SSL_CTX *s) |
0f113f3e MC |
897 | { |
898 | if (s == NULL) | |
899 | return (0); | |
900 | return (s->session_timeout); | |
901 | } | |
413c4f45 | 902 | |
12bf56c0 | 903 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
904 | int SSL_set_session_secret_cb(SSL *s, |
905 | int (*tls_session_secret_cb) (SSL *s, | |
906 | void *secret, | |
907 | int *secret_len, | |
908 | STACK_OF(SSL_CIPHER) | |
909 | *peer_ciphers, | |
910 | SSL_CIPHER | |
911 | **cipher, | |
912 | void *arg), | |
913 | void *arg) | |
914 | { | |
915 | if (s == NULL) | |
916 | return (0); | |
917 | s->tls_session_secret_cb = tls_session_secret_cb; | |
918 | s->tls_session_secret_cb_arg = arg; | |
919 | return (1); | |
920 | } | |
12bf56c0 DSH |
921 | |
922 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, | |
0f113f3e MC |
923 | void *arg) |
924 | { | |
925 | if (s == NULL) | |
926 | return (0); | |
927 | s->tls_session_ticket_ext_cb = cb; | |
928 | s->tls_session_ticket_ext_cb_arg = arg; | |
929 | return (1); | |
930 | } | |
12bf56c0 DSH |
931 | |
932 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) | |
0f113f3e MC |
933 | { |
934 | if (s->version >= TLS1_VERSION) { | |
935 | if (s->tlsext_session_ticket) { | |
936 | OPENSSL_free(s->tlsext_session_ticket); | |
937 | s->tlsext_session_ticket = NULL; | |
938 | } | |
939 | ||
940 | s->tlsext_session_ticket = | |
941 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); | |
942 | if (!s->tlsext_session_ticket) { | |
943 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); | |
944 | return 0; | |
945 | } | |
946 | ||
947 | if (ext_data) { | |
948 | s->tlsext_session_ticket->length = ext_len; | |
949 | s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; | |
950 | memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); | |
951 | } else { | |
952 | s->tlsext_session_ticket->length = 0; | |
953 | s->tlsext_session_ticket->data = NULL; | |
954 | } | |
955 | ||
956 | return 1; | |
957 | } | |
958 | ||
959 | return 0; | |
960 | } | |
961 | #endif /* OPENSSL_NO_TLSEXT */ | |
962 | ||
963 | typedef struct timeout_param_st { | |
964 | SSL_CTX *ctx; | |
965 | long time; | |
966 | LHASH_OF(SSL_SESSION) *cache; | |
967 | } TIMEOUT_PARAM; | |
d02b48c6 | 968 | |
3c1d6bbc | 969 | static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) |
0f113f3e MC |
970 | { |
971 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
972 | /* | |
973 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
974 | * locking overhead | |
975 | */ | |
976 | (void)lh_SSL_SESSION_delete(p->cache, s); | |
977 | SSL_SESSION_list_remove(p->ctx, s); | |
978 | s->not_resumable = 1; | |
979 | if (p->ctx->remove_session_cb != NULL) | |
980 | p->ctx->remove_session_cb(p->ctx, s); | |
981 | SSL_SESSION_free(s); | |
982 | } | |
983 | } | |
d02b48c6 | 984 | |
3c1d6bbc | 985 | static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM) |
3c914840 | 986 | |
6b691a5c | 987 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) |
0f113f3e MC |
988 | { |
989 | unsigned long i; | |
990 | TIMEOUT_PARAM tp; | |
991 | ||
992 | tp.ctx = s; | |
993 | tp.cache = s->sessions; | |
994 | if (tp.cache == NULL) | |
995 | return; | |
996 | tp.time = t; | |
997 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
998 | i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; | |
999 | CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; | |
1000 | lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), | |
1001 | TIMEOUT_PARAM, &tp); | |
1002 | CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; | |
1003 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
1004 | } | |
d02b48c6 | 1005 | |
6b691a5c | 1006 | int ssl_clear_bad_session(SSL *s) |
0f113f3e MC |
1007 | { |
1008 | if ((s->session != NULL) && | |
1009 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
1010 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
1011 | SSL_CTX_remove_session(s->ctx, s->session); | |
1012 | return (1); | |
1013 | } else | |
1014 | return (0); | |
1015 | } | |
58964a49 RE |
1016 | |
1017 | /* locked by SSL_CTX in the calling function */ | |
6b691a5c | 1018 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1019 | { |
1020 | if ((s->next == NULL) || (s->prev == NULL)) | |
1021 | return; | |
1022 | ||
1023 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
1024 | /* last element in list */ | |
1025 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1026 | /* only one element in list */ | |
1027 | ctx->session_cache_head = NULL; | |
1028 | ctx->session_cache_tail = NULL; | |
1029 | } else { | |
1030 | ctx->session_cache_tail = s->prev; | |
1031 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1032 | } | |
1033 | } else { | |
1034 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1035 | /* first element in list */ | |
1036 | ctx->session_cache_head = s->next; | |
1037 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1038 | } else { | |
1039 | /* middle of list */ | |
1040 | s->next->prev = s->prev; | |
1041 | s->prev->next = s->next; | |
1042 | } | |
1043 | } | |
1044 | s->prev = s->next = NULL; | |
1045 | } | |
58964a49 | 1046 | |
6b691a5c | 1047 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1048 | { |
1049 | if ((s->next != NULL) && (s->prev != NULL)) | |
1050 | SSL_SESSION_list_remove(ctx, s); | |
1051 | ||
1052 | if (ctx->session_cache_head == NULL) { | |
1053 | ctx->session_cache_head = s; | |
1054 | ctx->session_cache_tail = s; | |
1055 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1056 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1057 | } else { | |
1058 | s->next = ctx->session_cache_head; | |
1059 | s->next->prev = s; | |
1060 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1061 | ctx->session_cache_head = s; | |
1062 | } | |
1063 | } | |
58964a49 | 1064 | |
7806f3dd | 1065 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
0f113f3e MC |
1066 | int (*cb) (struct ssl_st *ssl, |
1067 | SSL_SESSION *sess)) | |
1068 | { | |
1069 | ctx->new_session_cb = cb; | |
1070 | } | |
7806f3dd | 1071 | |
0f113f3e MC |
1072 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { |
1073 | return ctx->new_session_cb; | |
1074 | } | |
7806f3dd NL |
1075 | |
1076 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1077 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) |
1078 | { | |
1079 | ctx->remove_session_cb = cb; | |
1080 | } | |
7806f3dd | 1081 | |
0f113f3e MC |
1082 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, |
1083 | SSL_SESSION *sess) { | |
1084 | return ctx->remove_session_cb; | |
1085 | } | |
7806f3dd NL |
1086 | |
1087 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1088 | SSL_SESSION *(*cb) (struct ssl_st *ssl, |
1089 | unsigned char *data, int len, | |
1090 | int *copy)) | |
1091 | { | |
1092 | ctx->get_session_cb = cb; | |
1093 | } | |
1094 | ||
1095 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
1096 | unsigned char *data, | |
1097 | int len, int *copy) { | |
1098 | return ctx->get_session_cb; | |
1099 | } | |
1100 | ||
1101 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
1102 | void (*cb) (const SSL *ssl, int type, int val)) | |
1103 | { | |
1104 | ctx->info_callback = cb; | |
1105 | } | |
1106 | ||
1107 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
1108 | int val) { | |
1109 | return ctx->info_callback; | |
1110 | } | |
7806f3dd NL |
1111 | |
1112 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1113 | int (*cb) (SSL *ssl, X509 **x509, |
1114 | EVP_PKEY **pkey)) | |
1115 | { | |
1116 | ctx->client_cert_cb = cb; | |
1117 | } | |
7806f3dd | 1118 | |
0f113f3e MC |
1119 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, |
1120 | EVP_PKEY **pkey) { | |
1121 | return ctx->client_cert_cb; | |
1122 | } | |
7806f3dd | 1123 | |
368888bc DSH |
1124 | #ifndef OPENSSL_NO_ENGINE |
1125 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
0f113f3e MC |
1126 | { |
1127 | if (!ENGINE_init(e)) { | |
1128 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
1129 | return 0; | |
1130 | } | |
1131 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
1132 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
1133 | SSL_R_NO_CLIENT_CERT_METHOD); | |
1134 | ENGINE_finish(e); | |
1135 | return 0; | |
1136 | } | |
1137 | ctx->client_cert_engine = e; | |
1138 | return 1; | |
1139 | } | |
368888bc DSH |
1140 | #endif |
1141 | ||
7806f3dd | 1142 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, |
0f113f3e MC |
1143 | int (*cb) (SSL *ssl, |
1144 | unsigned char *cookie, | |
1145 | unsigned int *cookie_len)) | |
1146 | { | |
1147 | ctx->app_gen_cookie_cb = cb; | |
1148 | } | |
7806f3dd NL |
1149 | |
1150 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1151 | int (*cb) (SSL *ssl, unsigned char *cookie, |
1152 | unsigned int cookie_len)) | |
1153 | { | |
1154 | ctx->app_verify_cookie_cb = cb; | |
1155 | } | |
7806f3dd | 1156 | |
0f113f3e MC |
1157 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, |
1158 | SSL_SESSION) |