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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 | |
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 | |
0f113f3e MC |
445 | if (len == 0) |
446 | try_session_cache = 0; | |
c519e89f | 447 | |
6434abbf | 448 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
449 | /* sets s->tlsext_ticket_expected */ |
450 | r = tls1_process_ticket(s, session_id, len, limit, &ret); | |
451 | switch (r) { | |
452 | case -1: /* Error during processing */ | |
453 | fatal = 1; | |
454 | goto err; | |
455 | case 0: /* No ticket found */ | |
456 | case 1: /* Zero length ticket found */ | |
457 | break; /* Ok to carry on processing session id. */ | |
458 | case 2: /* Ticket found but not decrypted. */ | |
459 | case 3: /* Ticket decrypted, *ret has been set. */ | |
460 | try_session_cache = 0; | |
461 | break; | |
462 | default: | |
463 | abort(); | |
464 | } | |
6434abbf | 465 | #endif |
c519e89f | 466 | |
0f113f3e MC |
467 | if (try_session_cache && |
468 | ret == NULL && | |
739a5eee | 469 | !(s->session_ctx->session_cache_mode & |
0f113f3e MC |
470 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { |
471 | SSL_SESSION data; | |
472 | data.ssl_version = s->version; | |
473 | data.session_id_length = len; | |
474 | if (len == 0) | |
475 | return 0; | |
476 | memcpy(data.session_id, session_id, len); | |
477 | CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); | |
478 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); | |
479 | if (ret != NULL) { | |
480 | /* don't allow other threads to steal it: */ | |
481 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
482 | } | |
483 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); | |
484 | if (ret == NULL) | |
485 | s->session_ctx->stats.sess_miss++; | |
486 | } | |
487 | ||
488 | if (try_session_cache && | |
489 | ret == NULL && s->session_ctx->get_session_cb != NULL) { | |
490 | int copy = 1; | |
491 | ||
492 | if ((ret = s->session_ctx->get_session_cb(s, session_id, len, ©))) { | |
493 | s->session_ctx->stats.sess_cb_hit++; | |
494 | ||
495 | /* | |
496 | * Increment reference count now if the session callback asks us | |
497 | * to do so (note that if the session structures returned by the | |
498 | * callback are shared between threads, it must handle the | |
499 | * reference count itself [i.e. copy == 0], or things won't be | |
500 | * thread-safe). | |
501 | */ | |
502 | if (copy) | |
503 | CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
504 | ||
505 | /* | |
506 | * Add the externally cached session to the internal cache as | |
507 | * well if and only if we are supposed to. | |
508 | */ | |
509 | if (! | |
739a5eee | 510 | (s->session_ctx->session_cache_mode & |
69f68237 | 511 | SSL_SESS_CACHE_NO_INTERNAL_STORE)) { |
0f113f3e MC |
512 | /* |
513 | * The following should not return 1, otherwise, things are | |
514 | * very strange | |
515 | */ | |
69f68237 MC |
516 | if(SSL_CTX_add_session(s->session_ctx, ret)) |
517 | goto err; | |
518 | } | |
0f113f3e MC |
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 | ||
62adbcee | 579 | SSL_SESSION_free(s->session); |
0f113f3e MC |
580 | s->session = ret; |
581 | s->verify_result = s->session->verify_result; | |
582 | return 1; | |
8876bc05 BM |
583 | |
584 | err: | |
0f113f3e MC |
585 | if (ret != NULL) { |
586 | SSL_SESSION_free(ret); | |
71fa4513 | 587 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
588 | if (!try_session_cache) { |
589 | /* | |
590 | * The session was from a ticket, so we should issue a ticket for | |
591 | * the new session | |
592 | */ | |
593 | s->tlsext_ticket_expected = 1; | |
594 | } | |
71fa4513 | 595 | #endif |
0f113f3e MC |
596 | } |
597 | if (fatal) | |
598 | return -1; | |
599 | else | |
600 | return 0; | |
601 | } | |
d02b48c6 | 602 | |
6b691a5c | 603 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) |
0f113f3e MC |
604 | { |
605 | int ret = 0; | |
606 | SSL_SESSION *s; | |
607 | ||
608 | /* | |
609 | * add just 1 reference count for the SSL_CTX's session cache even though | |
610 | * it has two ways of access: each session is in a doubly linked list and | |
611 | * an lhash | |
612 | */ | |
613 | CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
614 | /* | |
615 | * if session c is in already in cache, we take back the increment later | |
616 | */ | |
617 | ||
618 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
619 | s = lh_SSL_SESSION_insert(ctx->sessions, c); | |
620 | ||
621 | /* | |
622 | * s != NULL iff we already had a session with the given PID. In this | |
623 | * case, s == c should hold (then we did not really modify | |
624 | * ctx->sessions), or we're in trouble. | |
625 | */ | |
626 | if (s != NULL && s != c) { | |
627 | /* We *are* in trouble ... */ | |
628 | SSL_SESSION_list_remove(ctx, s); | |
629 | SSL_SESSION_free(s); | |
630 | /* | |
631 | * ... so pretend the other session did not exist in cache (we cannot | |
632 | * handle two SSL_SESSION structures with identical session ID in the | |
633 | * same cache, which could happen e.g. when two threads concurrently | |
634 | * obtain the same session from an external cache) | |
635 | */ | |
636 | s = NULL; | |
637 | } | |
638 | ||
639 | /* Put at the head of the queue unless it is already in the cache */ | |
640 | if (s == NULL) | |
641 | SSL_SESSION_list_add(ctx, c); | |
642 | ||
643 | if (s != NULL) { | |
644 | /* | |
645 | * existing cache entry -- decrement previously incremented reference | |
646 | * count because it already takes into account the cache | |
647 | */ | |
648 | ||
649 | SSL_SESSION_free(s); /* s == c */ | |
650 | ret = 0; | |
651 | } else { | |
652 | /* | |
653 | * new cache entry -- remove old ones if cache has become too large | |
654 | */ | |
655 | ||
656 | ret = 1; | |
657 | ||
658 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) { | |
659 | while (SSL_CTX_sess_number(ctx) > | |
660 | SSL_CTX_sess_get_cache_size(ctx)) { | |
661 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) | |
662 | break; | |
663 | else | |
664 | ctx->stats.sess_cache_full++; | |
665 | } | |
666 | } | |
667 | } | |
668 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
669 | return (ret); | |
670 | } | |
d02b48c6 | 671 | |
6b691a5c | 672 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) |
801294f8 | 673 | { |
0f113f3e | 674 | return remove_session_lock(ctx, c, 1); |
801294f8 DSH |
675 | } |
676 | ||
0fda2e37 | 677 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) |
0f113f3e MC |
678 | { |
679 | SSL_SESSION *r; | |
680 | int ret = 0; | |
681 | ||
682 | if ((c != NULL) && (c->session_id_length != 0)) { | |
683 | if (lck) | |
684 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
685 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { | |
686 | ret = 1; | |
687 | r = lh_SSL_SESSION_delete(ctx->sessions, c); | |
688 | SSL_SESSION_list_remove(ctx, c); | |
689 | } | |
690 | ||
691 | if (lck) | |
692 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
693 | ||
694 | if (ret) { | |
695 | r->not_resumable = 1; | |
696 | if (ctx->remove_session_cb != NULL) | |
697 | ctx->remove_session_cb(ctx, r); | |
698 | SSL_SESSION_free(r); | |
699 | } | |
700 | } else | |
701 | ret = 0; | |
702 | return (ret); | |
703 | } | |
d02b48c6 | 704 | |
6b691a5c | 705 | void SSL_SESSION_free(SSL_SESSION *ss) |
0f113f3e MC |
706 | { |
707 | int i; | |
d02b48c6 | 708 | |
0f113f3e MC |
709 | if (ss == NULL) |
710 | return; | |
e03ddfae | 711 | |
0f113f3e | 712 | i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); |
58964a49 | 713 | #ifdef REF_PRINT |
0f113f3e | 714 | REF_PRINT("SSL_SESSION", ss); |
58964a49 | 715 | #endif |
0f113f3e MC |
716 | if (i > 0) |
717 | return; | |
d02b48c6 | 718 | #ifdef REF_CHECK |
0f113f3e MC |
719 | if (i < 0) { |
720 | fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); | |
721 | abort(); /* ok */ | |
722 | } | |
d02b48c6 RE |
723 | #endif |
724 | ||
0f113f3e | 725 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
58964a49 | 726 | |
0f113f3e MC |
727 | OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); |
728 | OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); | |
729 | if (ss->sess_cert != NULL) | |
730 | ssl_sess_cert_free(ss->sess_cert); | |
731 | if (ss->peer != NULL) | |
732 | X509_free(ss->peer); | |
733 | if (ss->ciphers != NULL) | |
734 | sk_SSL_CIPHER_free(ss->ciphers); | |
ed3883d2 | 735 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
736 | if (ss->tlsext_hostname != NULL) |
737 | OPENSSL_free(ss->tlsext_hostname); | |
738 | if (ss->tlsext_tick != NULL) | |
739 | OPENSSL_free(ss->tlsext_tick); | |
740 | # ifndef OPENSSL_NO_EC | |
741 | ss->tlsext_ecpointformatlist_length = 0; | |
742 | if (ss->tlsext_ecpointformatlist != NULL) | |
743 | OPENSSL_free(ss->tlsext_ecpointformatlist); | |
744 | ss->tlsext_ellipticcurvelist_length = 0; | |
745 | if (ss->tlsext_ellipticcurvelist != NULL) | |
746 | OPENSSL_free(ss->tlsext_ellipticcurvelist); | |
747 | # endif /* OPENSSL_NO_EC */ | |
ddac1974 NL |
748 | #endif |
749 | #ifndef OPENSSL_NO_PSK | |
0f113f3e MC |
750 | if (ss->psk_identity_hint != NULL) |
751 | OPENSSL_free(ss->psk_identity_hint); | |
752 | if (ss->psk_identity != NULL) | |
753 | OPENSSL_free(ss->psk_identity); | |
edc032b5 BL |
754 | #endif |
755 | #ifndef OPENSSL_NO_SRP | |
0f113f3e MC |
756 | if (ss->srp_username != NULL) |
757 | OPENSSL_free(ss->srp_username); | |
ed3883d2 | 758 | #endif |
0f113f3e MC |
759 | OPENSSL_cleanse(ss, sizeof(*ss)); |
760 | OPENSSL_free(ss); | |
761 | } | |
d02b48c6 | 762 | |
6b691a5c | 763 | int SSL_set_session(SSL *s, SSL_SESSION *session) |
0f113f3e MC |
764 | { |
765 | int ret = 0; | |
766 | const SSL_METHOD *meth; | |
767 | ||
768 | if (session != NULL) { | |
769 | meth = s->ctx->method->get_ssl_method(session->ssl_version); | |
770 | if (meth == NULL) | |
771 | meth = s->method->get_ssl_method(session->ssl_version); | |
772 | if (meth == NULL) { | |
773 | SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); | |
774 | return (0); | |
775 | } | |
776 | ||
777 | if (meth != s->method) { | |
778 | if (!SSL_set_ssl_method(s, meth)) | |
779 | return (0); | |
780 | } | |
882e8912 | 781 | #ifndef OPENSSL_NO_KRB5 |
0f113f3e MC |
782 | if (s->kssl_ctx && !s->kssl_ctx->client_princ && |
783 | session->krb5_client_princ_len > 0) { | |
784 | s->kssl_ctx->client_princ = | |
785 | (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); | |
786 | if (s->kssl_ctx->client_princ == NULL) { | |
787 | SSLerr(SSL_F_SSL_SET_SESSION, ERR_R_MALLOC_FAILURE); | |
788 | return (0); | |
789 | } | |
790 | memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, | |
791 | session->krb5_client_princ_len); | |
792 | s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; | |
793 | } | |
794 | #endif /* OPENSSL_NO_KRB5 */ | |
795 | ||
796 | /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ | |
797 | CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); | |
798 | if (s->session != NULL) | |
799 | SSL_SESSION_free(s->session); | |
800 | s->session = session; | |
801 | s->verify_result = s->session->verify_result; | |
802 | /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ | |
803 | ret = 1; | |
804 | } else { | |
805 | if (s->session != NULL) { | |
806 | SSL_SESSION_free(s->session); | |
807 | s->session = NULL; | |
808 | } | |
809 | ||
810 | meth = s->ctx->method; | |
811 | if (meth != s->method) { | |
812 | if (!SSL_set_ssl_method(s, meth)) | |
813 | return (0); | |
814 | } | |
815 | ret = 1; | |
816 | } | |
817 | return (ret); | |
818 | } | |
d02b48c6 | 819 | |
6b691a5c | 820 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) |
0f113f3e MC |
821 | { |
822 | if (s == NULL) | |
823 | return (0); | |
824 | s->timeout = t; | |
825 | return (1); | |
826 | } | |
d02b48c6 | 827 | |
0821bcd4 | 828 | long SSL_SESSION_get_timeout(const SSL_SESSION *s) |
0f113f3e MC |
829 | { |
830 | if (s == NULL) | |
831 | return (0); | |
832 | return (s->timeout); | |
833 | } | |
d02b48c6 | 834 | |
0821bcd4 | 835 | long SSL_SESSION_get_time(const SSL_SESSION *s) |
0f113f3e MC |
836 | { |
837 | if (s == NULL) | |
838 | return (0); | |
839 | return (s->time); | |
840 | } | |
d02b48c6 | 841 | |
6b691a5c | 842 | long SSL_SESSION_set_time(SSL_SESSION *s, long t) |
0f113f3e MC |
843 | { |
844 | if (s == NULL) | |
845 | return (0); | |
846 | s->time = t; | |
847 | return (t); | |
848 | } | |
d02b48c6 | 849 | |
f2baac27 MC |
850 | int SSL_SESSION_has_ticket(const SSL_SESSION *s) |
851 | { | |
852 | return (s->tlsext_ticklen > 0) ? 1 : 0; | |
853 | } | |
854 | ||
855 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) | |
856 | { | |
857 | return s->tlsext_tick_lifetime_hint; | |
858 | } | |
859 | ||
b7c9187b MC |
860 | void SSL_SESSION_get0_ticket(const SSL_SESSION *s, unsigned char **tick, |
861 | size_t *len) | |
862 | { | |
863 | *len = s->tlsext_ticklen; | |
864 | if(tick != NULL) | |
865 | *tick = s->tlsext_tick; | |
866 | } | |
867 | ||
08557cf2 | 868 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) |
0f113f3e MC |
869 | { |
870 | return s->peer; | |
871 | } | |
872 | ||
873 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, | |
874 | unsigned int sid_ctx_len) | |
875 | { | |
876 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { | |
877 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, | |
878 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); | |
879 | return 0; | |
880 | } | |
881 | s->sid_ctx_length = sid_ctx_len; | |
882 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); | |
883 | ||
884 | return 1; | |
885 | } | |
08557cf2 | 886 | |
6b691a5c | 887 | long SSL_CTX_set_timeout(SSL_CTX *s, long t) |
0f113f3e MC |
888 | { |
889 | long l; | |
890 | if (s == NULL) | |
891 | return (0); | |
892 | l = s->session_timeout; | |
893 | s->session_timeout = t; | |
894 | return (l); | |
895 | } | |
413c4f45 | 896 | |
0821bcd4 | 897 | long SSL_CTX_get_timeout(const SSL_CTX *s) |
0f113f3e MC |
898 | { |
899 | if (s == NULL) | |
900 | return (0); | |
901 | return (s->session_timeout); | |
902 | } | |
413c4f45 | 903 | |
12bf56c0 | 904 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
905 | int SSL_set_session_secret_cb(SSL *s, |
906 | int (*tls_session_secret_cb) (SSL *s, | |
907 | void *secret, | |
908 | int *secret_len, | |
909 | STACK_OF(SSL_CIPHER) | |
910 | *peer_ciphers, | |
911 | SSL_CIPHER | |
912 | **cipher, | |
913 | void *arg), | |
914 | void *arg) | |
915 | { | |
916 | if (s == NULL) | |
917 | return (0); | |
918 | s->tls_session_secret_cb = tls_session_secret_cb; | |
919 | s->tls_session_secret_cb_arg = arg; | |
920 | return (1); | |
921 | } | |
12bf56c0 DSH |
922 | |
923 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, | |
0f113f3e MC |
924 | void *arg) |
925 | { | |
926 | if (s == NULL) | |
927 | return (0); | |
928 | s->tls_session_ticket_ext_cb = cb; | |
929 | s->tls_session_ticket_ext_cb_arg = arg; | |
930 | return (1); | |
931 | } | |
12bf56c0 DSH |
932 | |
933 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) | |
0f113f3e MC |
934 | { |
935 | if (s->version >= TLS1_VERSION) { | |
936 | if (s->tlsext_session_ticket) { | |
937 | OPENSSL_free(s->tlsext_session_ticket); | |
938 | s->tlsext_session_ticket = NULL; | |
939 | } | |
940 | ||
941 | s->tlsext_session_ticket = | |
942 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); | |
943 | if (!s->tlsext_session_ticket) { | |
944 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); | |
945 | return 0; | |
946 | } | |
947 | ||
948 | if (ext_data) { | |
949 | s->tlsext_session_ticket->length = ext_len; | |
950 | s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; | |
951 | memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); | |
952 | } else { | |
953 | s->tlsext_session_ticket->length = 0; | |
954 | s->tlsext_session_ticket->data = NULL; | |
955 | } | |
956 | ||
957 | return 1; | |
958 | } | |
959 | ||
960 | return 0; | |
961 | } | |
962 | #endif /* OPENSSL_NO_TLSEXT */ | |
963 | ||
964 | typedef struct timeout_param_st { | |
965 | SSL_CTX *ctx; | |
966 | long time; | |
967 | LHASH_OF(SSL_SESSION) *cache; | |
968 | } TIMEOUT_PARAM; | |
d02b48c6 | 969 | |
3c1d6bbc | 970 | static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) |
0f113f3e MC |
971 | { |
972 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ | |
973 | /* | |
974 | * The reason we don't call SSL_CTX_remove_session() is to save on | |
975 | * locking overhead | |
976 | */ | |
977 | (void)lh_SSL_SESSION_delete(p->cache, s); | |
978 | SSL_SESSION_list_remove(p->ctx, s); | |
979 | s->not_resumable = 1; | |
980 | if (p->ctx->remove_session_cb != NULL) | |
981 | p->ctx->remove_session_cb(p->ctx, s); | |
982 | SSL_SESSION_free(s); | |
983 | } | |
984 | } | |
d02b48c6 | 985 | |
3c1d6bbc | 986 | static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM) |
3c914840 | 987 | |
6b691a5c | 988 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t) |
0f113f3e MC |
989 | { |
990 | unsigned long i; | |
991 | TIMEOUT_PARAM tp; | |
992 | ||
993 | tp.ctx = s; | |
994 | tp.cache = s->sessions; | |
995 | if (tp.cache == NULL) | |
996 | return; | |
997 | tp.time = t; | |
998 | CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); | |
999 | i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; | |
1000 | CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; | |
1001 | lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), | |
1002 | TIMEOUT_PARAM, &tp); | |
1003 | CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; | |
1004 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); | |
1005 | } | |
d02b48c6 | 1006 | |
6b691a5c | 1007 | int ssl_clear_bad_session(SSL *s) |
0f113f3e MC |
1008 | { |
1009 | if ((s->session != NULL) && | |
1010 | !(s->shutdown & SSL_SENT_SHUTDOWN) && | |
1011 | !(SSL_in_init(s) || SSL_in_before(s))) { | |
1012 | SSL_CTX_remove_session(s->ctx, s->session); | |
1013 | return (1); | |
1014 | } else | |
1015 | return (0); | |
1016 | } | |
58964a49 RE |
1017 | |
1018 | /* locked by SSL_CTX in the calling function */ | |
6b691a5c | 1019 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1020 | { |
1021 | if ((s->next == NULL) || (s->prev == NULL)) | |
1022 | return; | |
1023 | ||
1024 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { | |
1025 | /* last element in list */ | |
1026 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1027 | /* only one element in list */ | |
1028 | ctx->session_cache_head = NULL; | |
1029 | ctx->session_cache_tail = NULL; | |
1030 | } else { | |
1031 | ctx->session_cache_tail = s->prev; | |
1032 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1033 | } | |
1034 | } else { | |
1035 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { | |
1036 | /* first element in list */ | |
1037 | ctx->session_cache_head = s->next; | |
1038 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1039 | } else { | |
1040 | /* middle of list */ | |
1041 | s->next->prev = s->prev; | |
1042 | s->prev->next = s->next; | |
1043 | } | |
1044 | } | |
1045 | s->prev = s->next = NULL; | |
1046 | } | |
58964a49 | 1047 | |
6b691a5c | 1048 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) |
0f113f3e MC |
1049 | { |
1050 | if ((s->next != NULL) && (s->prev != NULL)) | |
1051 | SSL_SESSION_list_remove(ctx, s); | |
1052 | ||
1053 | if (ctx->session_cache_head == NULL) { | |
1054 | ctx->session_cache_head = s; | |
1055 | ctx->session_cache_tail = s; | |
1056 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1057 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail); | |
1058 | } else { | |
1059 | s->next = ctx->session_cache_head; | |
1060 | s->next->prev = s; | |
1061 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head); | |
1062 | ctx->session_cache_head = s; | |
1063 | } | |
1064 | } | |
58964a49 | 1065 | |
7806f3dd | 1066 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, |
0f113f3e MC |
1067 | int (*cb) (struct ssl_st *ssl, |
1068 | SSL_SESSION *sess)) | |
1069 | { | |
1070 | ctx->new_session_cb = cb; | |
1071 | } | |
7806f3dd | 1072 | |
0f113f3e MC |
1073 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { |
1074 | return ctx->new_session_cb; | |
1075 | } | |
7806f3dd NL |
1076 | |
1077 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1078 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) |
1079 | { | |
1080 | ctx->remove_session_cb = cb; | |
1081 | } | |
7806f3dd | 1082 | |
0f113f3e MC |
1083 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, |
1084 | SSL_SESSION *sess) { | |
1085 | return ctx->remove_session_cb; | |
1086 | } | |
7806f3dd NL |
1087 | |
1088 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1089 | SSL_SESSION *(*cb) (struct ssl_st *ssl, |
1090 | unsigned char *data, int len, | |
1091 | int *copy)) | |
1092 | { | |
1093 | ctx->get_session_cb = cb; | |
1094 | } | |
1095 | ||
1096 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, | |
1097 | unsigned char *data, | |
1098 | int len, int *copy) { | |
1099 | return ctx->get_session_cb; | |
1100 | } | |
1101 | ||
1102 | void SSL_CTX_set_info_callback(SSL_CTX *ctx, | |
1103 | void (*cb) (const SSL *ssl, int type, int val)) | |
1104 | { | |
1105 | ctx->info_callback = cb; | |
1106 | } | |
1107 | ||
1108 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, | |
1109 | int val) { | |
1110 | return ctx->info_callback; | |
1111 | } | |
7806f3dd NL |
1112 | |
1113 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1114 | int (*cb) (SSL *ssl, X509 **x509, |
1115 | EVP_PKEY **pkey)) | |
1116 | { | |
1117 | ctx->client_cert_cb = cb; | |
1118 | } | |
7806f3dd | 1119 | |
0f113f3e MC |
1120 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, |
1121 | EVP_PKEY **pkey) { | |
1122 | return ctx->client_cert_cb; | |
1123 | } | |
7806f3dd | 1124 | |
368888bc DSH |
1125 | #ifndef OPENSSL_NO_ENGINE |
1126 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) | |
0f113f3e MC |
1127 | { |
1128 | if (!ENGINE_init(e)) { | |
1129 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); | |
1130 | return 0; | |
1131 | } | |
1132 | if (!ENGINE_get_ssl_client_cert_function(e)) { | |
1133 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, | |
1134 | SSL_R_NO_CLIENT_CERT_METHOD); | |
1135 | ENGINE_finish(e); | |
1136 | return 0; | |
1137 | } | |
1138 | ctx->client_cert_engine = e; | |
1139 | return 1; | |
1140 | } | |
368888bc DSH |
1141 | #endif |
1142 | ||
7806f3dd | 1143 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, |
0f113f3e MC |
1144 | int (*cb) (SSL *ssl, |
1145 | unsigned char *cookie, | |
1146 | unsigned int *cookie_len)) | |
1147 | { | |
1148 | ctx->app_gen_cookie_cb = cb; | |
1149 | } | |
7806f3dd NL |
1150 | |
1151 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, | |
0f113f3e MC |
1152 | int (*cb) (SSL *ssl, unsigned char *cookie, |
1153 | unsigned int cookie_len)) | |
1154 | { | |
1155 | ctx->app_verify_cookie_cb = cb; | |
1156 | } | |
7806f3dd | 1157 | |
0f113f3e MC |
1158 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, |
1159 | SSL_SESSION) |