openssl/ssl/ssl_sess.c - Issue 2072073002: Delete bundled copy of OpenSSL and replace with README.

Side by Side Diff: openssl/ssl/ssl_sess.c

Issue 2072073002: Delete bundled copy of OpenSSL and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master

Patch Set: Delete bundled copy of OpenSSL and replace with README. Created 4 years, 6 months ago

Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.

Jump to:

View unified diff | Download patch

OLD	NEW
	(Empty)
1 /* ssl/ssl_sess.c */

2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

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.

8 *

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).

15 *

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.

22 *

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 :-).

37 * 4. If you include any Windows specific code (or a derivative thereof) from

38 * the apps directory (application code) you must include an acknowledgement:

39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

40 *

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.

52 *

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 */

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

66 * notice, this list of conditions and the following disclaimer.

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 */

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 */

137

138 #include <stdio.h>

139 #include <openssl/lhash.h>

140 #include <openssl/rand.h>

141 #ifndef OPENSSL_NO_ENGINE

142 #include <openssl/engine.h>

143 #endif

144 #include "ssl_locl.h"

145

146 static void SSL_SESSION_list_remove(SSL_CTX ctx, SSL_SESSION s);

147 static void SSL_SESSION_list_add(SSL_CTX ctx,SSL_SESSION s);

148 static int remove_session_lock(SSL_CTX ctx, SSL_SESSION c, int lck);

149

150 SSL_SESSION SSL_get_session(const SSL ssl)

151 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */

152 {

153 return(ssl->session);

154 }

155

156 SSL_SESSION SSL_get1_session(SSL ssl)

157 /* variant of SSL_get_session: caller really gets something */

158 {

159 SSL_SESSION *sess;

160 /* Need to lock this all up rather than just use CRYPTO_add so that

161 * somebody doesn't free ssl->session between when we check it's

162 * non-null and when we up the reference count. */

163 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);

164 sess = ssl->session;

165 if(sess)

166 sess->references++;

167 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);

168 return(sess);

169 }

170

171 int SSL_SESSION_get_ex_new_index(long argl, void argp, CRYPTO_EX_new new_func,

172 CRYPTO_EX_dup dup_func, CRYPTO_EX_free free_func)

173 {

174 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,

175 new_func, dup_func, free_func);

176 }

177

178 int SSL_SESSION_set_ex_data(SSL_SESSION s, int idx, void arg)

179 {

180 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));

181 }

182

183 void SSL_SESSION_get_ex_data(const SSL_SESSION s, int idx)

184 {

185 return(CRYPTO_get_ex_data(&s->ex_data,idx));

186 }

187

188 SSL_SESSION *SSL_SESSION_new(void)

189 {

190 SSL_SESSION *ss;

191

192 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));

193 if (ss == NULL)

194 {

195 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);

196 return(0);

197 }

198 memset(ss,0,sizeof(SSL_SESSION));

199

200 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */

201 ss->references=1;

202 ss->timeout=605+4; / 5 minute timeout by default */

203 ss->time=(unsigned long)time(NULL);

204 ss->prev=NULL;

205 ss->next=NULL;

206 ss->compress_meth=0;

207 #ifndef OPENSSL_NO_TLSEXT

208 ss->tlsext_hostname = NULL;

209 #ifndef OPENSSL_NO_EC

210 ss->tlsext_ecpointformatlist_length = 0;

211 ss->tlsext_ecpointformatlist = NULL;

212 ss->tlsext_ellipticcurvelist_length = 0;

213 ss->tlsext_ellipticcurvelist = NULL;

214 #endif

215 #endif

216 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);

217 #ifndef OPENSSL_NO_PSK

218 ss->psk_identity_hint=NULL;

219 ss->psk_identity=NULL;

220 #endif

221 #ifndef OPENSSL_NO_SRP

222 ss->srp_username=NULL;

223 #endif

224 return(ss);

225 }

226

227 const unsigned char SSL_SESSION_get_id(const SSL_SESSION s, unsigned int *len)

228 {

229 if(len)

230 *len = s->session_id_length;

231 return s->session_id;

232 }

233

234 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s)

235 {

236 return s->compress_meth;

237 }

238

239 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1

240 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly

241 * until we have no conflict is going to complete in one iteration pretty much

242 * "most" of the time (btw: understatement). So, if it takes us 10 iterations

243 * and we still can't avoid a conflict - well that's a reasonable point to call

244 * it quits. Either the RAND code is broken or someone is trying to open roughly

245 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might

246 * store that many sessions is perhaps a more interesting question ... */

247

248 #define MAX_SESS_ID_ATTEMPTS 10

249 static int def_generate_session_id(const SSL ssl, unsigned char id,

250 unsigned int *id_len)

251 {

252 unsigned int retry = 0;

253 do

254 if (RAND_pseudo_bytes(id, *id_len) <= 0)

255 return 0;

256 while(SSL_has_matching_session_id(ssl, id, *id_len) &&

257 (++retry < MAX_SESS_ID_ATTEMPTS));

258 if(retry < MAX_SESS_ID_ATTEMPTS)

259 return 1;

260 /* else - woops a session_id match */

261 /* XXX We should also check the external cache --

262 * but the probability of a collision is negligible, and

263 * we could not prevent the concurrent creation of sessions

264 * with identical IDs since we currently don't have means

265 * to atomically check whether a session ID already exists

266 * and make a reservation for it if it does not

267 * (this problem applies to the internal cache as well).

268 */

269 return 0;

270 }

271

272 void SSL_set_session_creation_enabled (SSL *s, int creation_enabled)

273 {

274 s->session_creation_enabled = creation_enabled;

275 }

276

277 int ssl_get_new_session(SSL *s, int session)

278 {

279 /* This gets used by clients and servers. */

280

281 unsigned int tmp;

282 SSL_SESSION *ss=NULL;

283 GEN_SESSION_CB cb = def_generate_session_id;

284

285 /* caller should check this if they can do better error handling */

286 if (!s->session_creation_enabled) return(0);

287 if ((ss=SSL_SESSION_new()) == NULL) 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 {

297 SSL_SESSION_free(s->session);

298 s->session=NULL;

299 }

300

301 if (session)

302 {

303 if (s->version == SSL2_VERSION)

304 {

305 ss->ssl_version=SSL2_VERSION;

306 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;

307 }

308 else if (s->version == SSL3_VERSION)

309 {

310 ss->ssl_version=SSL3_VERSION;

311 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;

312 }

313 else if (s->version == TLS1_VERSION)

314 {

315 ss->ssl_version=TLS1_VERSION;

316 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;

317 }

318 else if (s->version == TLS1_1_VERSION)

319 {

320 ss->ssl_version=TLS1_1_VERSION;

321 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;

322 }

323 else if (s->version == TLS1_2_VERSION)

324 {

325 ss->ssl_version=TLS1_2_VERSION;

326 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;

327 }

328 else if (s->version == DTLS1_BAD_VER)

329 {

330 ss->ssl_version=DTLS1_BAD_VER;

331 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;

332 }

333 else if (s->version == DTLS1_VERSION)

334 {

335 ss->ssl_version=DTLS1_VERSION;

336 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;

337 }

338 else

339 {

340 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_V ERSION);

341 SSL_SESSION_free(ss);

342 return(0);

343 }

344 #ifndef OPENSSL_NO_TLSEXT

345 /* If RFC4507 ticket use empty session ID */

346 if (s->tlsext_ticket_expected)

347 {

348 ss->session_id_length = 0;

349 goto sess_id_done;

350 }

351 #endif

352 /* Choose which callback will set the session ID */

353 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);

354 if(s->generate_session_id)

355 cb = s->generate_session_id;

356 else if(s->session_ctx->generate_session_id)

357 cb = s->session_ctx->generate_session_id;

358 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);

359 /* Choose a session ID */

360 tmp = ss->session_id_length;

361 if(!cb(s, ss->session_id, &tmp))

362 {

363 /* The callback failed */

364 SSLerr(SSL_F_SSL_GET_NEW_SESSION,

365 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);

366 SSL_SESSION_free(ss);

367 return(0);

368 }

369 /* Don't allow the callback to set the session length to zero.

370 * nor set it higher than it was. */

371 if(!tmp \|\| (tmp > ss->session_id_length))

372 {

373 /* The callback set an illegal length */

374 SSLerr(SSL_F_SSL_GET_NEW_SESSION,

375 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);

376 SSL_SESSION_free(ss);

377 return(0);

378 }

379 /* If the session length was shrunk and we're SSLv2, pad it */

380 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION) )

381 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);

382 else

383 ss->session_id_length = tmp;

384 /* Finally, check for a conflict */

385 if(SSL_has_matching_session_id(s, ss->session_id,

386 ss->session_id_length))

387 {

388 SSLerr(SSL_F_SSL_GET_NEW_SESSION,

389 SSL_R_SSL_SESSION_ID_CONFLICT);

390 SSL_SESSION_free(ss);

391 return(0);

392 }

393 #ifndef OPENSSL_NO_TLSEXT

394 sess_id_done:

395 if (s->tlsext_hostname) {

396 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);

397 if (ss->tlsext_hostname == NULL) {

398 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL _ERROR);

399 SSL_SESSION_free(ss);

400 return 0;

401 }

402 }

403 #ifndef OPENSSL_NO_EC

404 if (s->tlsext_ecpointformatlist)

405 {

406 if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(s s->tlsext_ecpointformatlist);

407 if ((ss->tlsext_ecpointformatlist = OPENSSL_malloc(s->tl sext_ecpointformatlist_length)) == NULL)

408 {

409 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_F AILURE);

410 SSL_SESSION_free(ss);

411 return 0;

412 }

413 ss->tlsext_ecpointformatlist_length = s->tlsext_ecpointf ormatlist_length;

414 memcpy(ss->tlsext_ecpointformatlist, s->tlsext_ecpointfo rmatlist, s->tlsext_ecpointformatlist_length);

415 }

416 if (s->tlsext_ellipticcurvelist)

417 {

418 if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s s->tlsext_ellipticcurvelist);

419 if ((ss->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tl sext_ellipticcurvelist_length)) == NULL)

420 {

421 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_F AILURE);

422 SSL_SESSION_free(ss);

423 return 0;

424 }

425 ss->tlsext_ellipticcurvelist_length = s->tlsext_elliptic curvelist_length;

426 memcpy(ss->tlsext_ellipticcurvelist, s->tlsext_ellipticc urvelist, s->tlsext_ellipticcurvelist_length);

427 }

428 #endif

429 #endif

430 }

431 else

432 {

433 ss->session_id_length=0;

434 }

435

436 if (s->sid_ctx_length > sizeof ss->sid_ctx)

437 {

438 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);

439 SSL_SESSION_free(ss);

440 return 0;

441 }

442 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);

443 ss->sid_ctx_length=s->sid_ctx_length;

444 s->session=ss;

445 ss->ssl_version=s->version;

446 ss->verify_result = X509_V_OK;

447

448 return(1);

449 }

450

451 /* ssl_get_prev attempts to find an SSL_SESSION to be used to resume this

452 * connection. It is only called by servers.

453 *

454 * session_id: points at the session ID in the ClientHello. This code will

455 * read past the end of this in order to parse out the session ticket

456 * extension, if any.

457 * len: the length of the session ID.

458 * limit: a pointer to the first byte after the ClientHello.

459 *

460 * Returns:

461 * -1: error

462 * 0: a session may have been found.

463 *

464 * Side effects:

465 * - If a session is found then s->session is pointed at it (after freeing an

466 * existing session if need be) and s->verify_result is set from the session .

467 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1

468 * if the server should issue a new session ticket (to 0 otherwise).

469 */

470 int ssl_get_prev_session(SSL s, unsigned char session_id, int len,

471 const unsigned char *limit)

472 {

473 /* This is used only by servers. */

474

475 SSL_SESSION *ret=NULL;

476 int fatal = 0;

477 int try_session_cache = 1;

478 #ifndef OPENSSL_NO_TLSEXT

479 int r;

480 #endif

481

482 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)

483 goto err;

484

485 if (len == 0)

486 try_session_cache = 0;

487

488 #ifndef OPENSSL_NO_TLSEXT

489 r = tls1_process_ticket(s, session_id, len, limit, &ret); /* sets s->tls ext_ticket_expected */

490 switch (r)

491 {

492 case -1: /* Error during processing */

493 fatal = 1;

494 goto err;

495 case 0: /* No ticket found */

496 case 1: /* Zero length ticket found */

497 break; /* Ok to carry on processing session id. */

498 case 2: /* Ticket found but not decrypted. */

499 case 3: /* Ticket decrypted, ret has been set. /

500 try_session_cache = 0;

501 break;

502 default:

503 abort();

504 }

505 #endif

506

507 if (try_session_cache &&

508 ret == NULL &&

509 !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LO OKUP))

510 {

511 SSL_SESSION data;

512 data.ssl_version=s->version;

513 data.session_id_length=len;

514 if (len == 0)

515 return 0;

516 memcpy(data.session_id,session_id,len);

517 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);

518 ret=lh_SSL_SESSION_retrieve(s->session_ctx->sessions,&data);

519 if (ret != NULL)

520 {

521 /* don't allow other threads to steal it: */

522 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);

523 }

524 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);

525 if (ret == NULL)

526 s->session_ctx->stats.sess_miss++;

527 }

528

529 if (try_session_cache &&

530 ret == NULL &&

531 s->session_ctx->get_session_cb != NULL)

532 {

533 int copy=1;

534

535 if ((ret=s->session_ctx->get_session_cb(s,session_id,len,&copy)) )

536 {

537 s->session_ctx->stats.sess_cb_hit++;

538

539 /* Increment reference count now if the session callback

540 * asks us to do so (note that if the session structures

541 * returned by the callback are shared between threads,

542 * it must handle the reference count itself [i.e. copy == 0],

543 * or things won't be thread-safe). */

544 if (copy)

545 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SE SSION);

546

547 /* Add the externally cached session to the internal

548 * cache as well if and only if we are supposed to. */

549 if(!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE _NO_INTERNAL_STORE))

550 /* The following should not return 1, otherwise,

551 * things are very strange */

552 SSL_CTX_add_session(s->session_ctx,ret);

553 }

554 }

555

556 if (ret == NULL)

557 goto err;

558

559 /* Now ret is non-NULL and we own one of its reference counts. */

560

561 if (ret->sid_ctx_length != s->sid_ctx_length

562 \|\| memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length))

563 {

564 /* We have the session requested by the client, but we don't

565 * want to use it in this context. */

566 goto err; /* treat like cache miss */

567 }

568

569 if((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0)

570 {

571 /* We can't be sure if this session is being used out of

572 * context, which is especially important for SSL_VERIFY_PEER.

573 * The application should have used SSL[_CTX]_set_session_id_con text.

574 *

575 * For this error case, we generate an error instead of treating

576 * the event like a cache miss (otherwise it would be easy for

577 * applications to effectively disable the session cache by

578 * accident without anyone noticing).

579 */

580

581 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINI TIALIZED);

582 fatal = 1;

583 goto err;

584 }

585

586 if (ret->cipher == NULL)

587 {

588 unsigned char buf[5],*p;

589 unsigned long l;

590

591 p=buf;

592 l=ret->cipher_id;

593 l2n(l,p);

594 if ((ret->ssl_version>>8) >= SSL3_VERSION_MAJOR)

595 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));

596 else

597 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));

598 if (ret->cipher == NULL)

599 goto err;

600 }

601

602 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */

603 {

604 s->session_ctx->stats.sess_timeout++;

605 if (try_session_cache)

606 {

607 /* session was from the cache, so remove it */

608 SSL_CTX_remove_session(s->session_ctx,ret);

609 }

610 goto err;

611 }

612

613 s->session_ctx->stats.sess_hit++;

614

615 if (s->session != NULL)

616 SSL_SESSION_free(s->session);

617 s->session=ret;

618 s->verify_result = s->session->verify_result;

619 return 1;

620

621 err:

622 if (ret != NULL)

623 {

624 SSL_SESSION_free(ret);

625 #ifndef OPENSSL_NO_TLSEXT

626 if (!try_session_cache)

627 {

628 /* The session was from a ticket, so we should

629 * issue a ticket for the new session */

630 s->tlsext_ticket_expected = 1;

631 }

632 #endif

633 }

634 if (fatal)

635 return -1;

636 else

637 return 0;

638 }

639

640 int SSL_CTX_add_session(SSL_CTX ctx, SSL_SESSION c)

641 {

642 int ret=0;

643 SSL_SESSION *s;

644

645 /* add just 1 reference count for the SSL_CTX's session cache

646 * even though it has two ways of access: each session is in a

647 * doubly linked list and an lhash */

648 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);

649 /* if session c is in already in cache, we take back the increment later */

650

651 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);

652 s=lh_SSL_SESSION_insert(ctx->sessions,c);

653

654 /* s != NULL iff we already had a session with the given PID.

655 * In this case, s == c should hold (then we did not really modify

656 * ctx->sessions), or we're in trouble. */

657 if (s != NULL && s != c)

658 {

659 /* We are in trouble ... */

660 SSL_SESSION_list_remove(ctx,s);

661 SSL_SESSION_free(s);

662 /* ... so pretend the other session did not exist in cache

663 * (we cannot handle two SSL_SESSION structures with identical

664 * session ID in the same cache, which could happen e.g. when

665 * two threads concurrently obtain the same session from an exte rnal

666 * cache) */

667 s = NULL;

668 }

669

670 /* Put at the head of the queue unless it is already in the cache */

671 if (s == NULL)

672 SSL_SESSION_list_add(ctx,c);

673

674 if (s != NULL)

675 {

676 /* existing cache entry -- decrement previously incremented refe rence

677 * count because it already takes into account the cache */

678

679 SSL_SESSION_free(s); /* s == c */

680 ret=0;

681 }

682 else

683 {

684 /* new cache entry -- remove old ones if cache has become too la rge */

685

686 ret=1;

687

688 if (SSL_CTX_sess_get_cache_size(ctx) > 0)

689 {

690 while (SSL_CTX_sess_number(ctx) >

691 SSL_CTX_sess_get_cache_size(ctx))

692 {

693 if (!remove_session_lock(ctx,

694 ctx->session_cache_tail, 0))

695 break;

696 else

697 ctx->stats.sess_cache_full++;

698 }

699 }

700 }

701 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);

702 return(ret);

703 }

704

705 int SSL_CTX_remove_session(SSL_CTX ctx, SSL_SESSION c)

706 {

707 return remove_session_lock(ctx, c, 1);

708 }

709

710 static int remove_session_lock(SSL_CTX ctx, SSL_SESSION c, int lck)

711 {

712 SSL_SESSION *r;

713 int ret=0;

714

715 if ((c != NULL) && (c->session_id_length != 0))

716 {

717 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);

718 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions,c)) == c)

719 {

720 ret=1;

721 r=lh_SSL_SESSION_delete(ctx->sessions,c);

722 SSL_SESSION_list_remove(ctx,c);

723 }

724

725 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);

726

727 if (ret)

728 {

729 r->not_resumable=1;

730 if (ctx->remove_session_cb != NULL)

731 ctx->remove_session_cb(ctx,r);

732 SSL_SESSION_free(r);

733 }

734 }

735 else

736 ret=0;

737 return(ret);

738 }

739

740 void SSL_SESSION_free(SSL_SESSION *ss)

741 {

742 int i;

743

744 if(ss == NULL)

745 return;

746

747 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);

748 #ifdef REF_PRINT

749 REF_PRINT("SSL_SESSION",ss);

750 #endif

751 if (i > 0) return;

752 #ifdef REF_CHECK

753 if (i < 0)

754 {

755 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");

756 abort(); /* ok */

757 }

758 #endif

759

760 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);

761

762 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);

763 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);

764 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);

765 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);

766 if (ss->peer != NULL) X509_free(ss->peer);

767 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);

768 #ifndef OPENSSL_NO_TLSEXT

769 if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname);

770 if (ss->tlsext_tick != NULL) OPENSSL_free(ss->tlsext_tick);

771 #ifndef OPENSSL_NO_EC

772 ss->tlsext_ecpointformatlist_length = 0;

773 if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpoin tformatlist);

774 ss->tlsext_ellipticcurvelist_length = 0;

775 if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipt iccurvelist);

776 #endif /* OPENSSL_NO_EC */

777 #endif

778 #ifndef OPENSSL_NO_PSK

779 if (ss->psk_identity_hint != NULL)

780 OPENSSL_free(ss->psk_identity_hint);

781 if (ss->psk_identity != NULL)

782 OPENSSL_free(ss->psk_identity);

783 #endif

784 #ifndef OPENSSL_NO_SRP

785 if (ss->srp_username != NULL)

786 OPENSSL_free(ss->srp_username);

787 #endif

788 OPENSSL_cleanse(ss,sizeof(*ss));

789 OPENSSL_free(ss);

790 }

791

792 int SSL_set_session(SSL s, SSL_SESSION session)

793 {

794 int ret=0;

795 const SSL_METHOD *meth;

796

797 if (session != NULL)

798 {

799 meth=s->ctx->method->get_ssl_method(session->ssl_version);

800 if (meth == NULL)

801 meth=s->method->get_ssl_method(session->ssl_version);

802 if (meth == NULL)

803 {

804 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_ME THOD);

805 return(0);

806 }

807

808 if (meth != s->method)

809 {

810 if (!SSL_set_ssl_method(s,meth))

811 return(0);

812 }

813

814 #ifndef OPENSSL_NO_KRB5

815 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&

816 session->krb5_client_princ_len > 0)

817 {

818 s->kssl_ctx->client_princ = (char *)OPENSSL_malloc(session-> krb5_client_princ_len + 1);

819 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,

820 session->krb5_client_princ_len);

821 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';

822 }

823 #endif /* OPENSSL_NO_KRB5 */

824

825 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/

826 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);

827 if (s->session != NULL)

828 SSL_SESSION_free(s->session);

829 s->session=session;

830 s->verify_result = s->session->verify_result;

831 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/

832 ret=1;

833 }

834 else

835 {

836 if (s->session != NULL)

837 {

838 SSL_SESSION_free(s->session);

839 s->session=NULL;

840 }

841

842 meth=s->ctx->method;

843 if (meth != s->method)

844 {

845 if (!SSL_set_ssl_method(s,meth))

846 return(0);

847 }

848 ret=1;

849 }

850 return(ret);

851 }

852

853 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)

854 {

855 if (s == NULL) return(0);

856 s->timeout=t;

857 return(1);

858 }

859

860 long SSL_SESSION_get_timeout(const SSL_SESSION *s)

861 {

862 if (s == NULL) return(0);

863 return(s->timeout);

864 }

865

866 long SSL_SESSION_get_time(const SSL_SESSION *s)

867 {

868 if (s == NULL) return(0);

869 return(s->time);

870 }

871

872 long SSL_SESSION_set_time(SSL_SESSION *s, long t)

873 {

874 if (s == NULL) return(0);

875 s->time=t;

876 return(t);

877 }

878

879 X509 SSL_SESSION_get0_peer(SSL_SESSION s)

880 {

881 return s->peer;

882 }

883

884 int SSL_SESSION_set1_id_context(SSL_SESSION s,const unsigned char sid_ctx,

885 unsigned int sid_ctx_len)

886 {

887 if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)

888 {

889 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CO NTEXT_TOO_LONG);

890 return 0;

891 }

892 s->sid_ctx_length=sid_ctx_len;

893 memcpy(s->sid_ctx,sid_ctx,sid_ctx_len);

894

895 return 1;

896 }

897

898 long SSL_CTX_set_timeout(SSL_CTX *s, long t)

899 {

900 long l;

901 if (s == NULL) return(0);

902 l=s->session_timeout;

903 s->session_timeout=t;

904 return(l);

905 }

906

907 long SSL_CTX_get_timeout(const SSL_CTX *s)

908 {

909 if (s == NULL) return(0);

910 return(s->session_timeout);

911 }

912

913 #ifndef OPENSSL_NO_TLSEXT

914 int SSL_set_session_secret_cb(SSL s, int (tls_session_secret_cb)(SSL s, void secret, int *secret_len,

915 STACK_OF(SSL_CIPHER) peer_ciphers, SSL_CIPHER cipher, void arg), voi d *arg)

916 {

917 if (s == NULL) return(0);

918 s->tls_session_secret_cb = tls_session_secret_cb;

919 s->tls_session_secret_cb_arg = arg;

920 return(1);

921 }

922

923 int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,

924 void *arg)

925 {

926 if (s == NULL) return(0);

927 s->tls_session_ticket_ext_cb = cb;

928 s->tls_session_ticket_ext_cb_arg = arg;

929 return(1);

930 }

931

932 int SSL_set_session_ticket_ext(SSL s, void ext_data, int ext_len)

933 {

934 if (s->version >= TLS1_VERSION)

935 {

936 if (s->tlsext_session_ticket)

937 {

938 OPENSSL_free(s->tlsext_session_ticket);

939 s->tlsext_session_ticket = NULL;

940 }

941

942 s->tlsext_session_ticket = OPENSSL_malloc(sizeof(TLS_SESSION_TIC KET_EXT) + ext_len);

943 if (!s->tlsext_session_ticket)

944 {

945 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FA ILURE);

946 return 0;

947 }

948

949 if (ext_data)

950 {

951 s->tlsext_session_ticket->length = ext_len;

952 s->tlsext_session_ticket->data = s->tlsext_session_ticke t + 1;

953 memcpy(s->tlsext_session_ticket->data, ext_data, ext_len );

954 }

955 else

956 {

957 s->tlsext_session_ticket->length = 0;

958 s->tlsext_session_ticket->data = NULL;

959 }

960

961 return 1;

962 }

963

964 return 0;

965 }

966 #endif /* OPENSSL_NO_TLSEXT */

967

968 typedef struct timeout_param_st

969 {

970 SSL_CTX *ctx;

971 long time;

972 LHASH_OF(SSL_SESSION) *cache;

973 } TIMEOUT_PARAM;

974

975 static void timeout_doall_arg(SSL_SESSION s, TIMEOUT_PARAM p)

976 {

977 if ((p->time == 0) \|\| (p->time > (s->time+s->timeout))) /* timeout */

978 {

979 /* The reason we don't call SSL_CTX_remove_session() is to

980 * save on locking overhead */

981 (void)lh_SSL_SESSION_delete(p->cache,s);

982 SSL_SESSION_list_remove(p->ctx,s);

983 s->not_resumable=1;

984 if (p->ctx->remove_session_cb != NULL)

985 p->ctx->remove_session_cb(p->ctx,s);

986 SSL_SESSION_free(s);

987 }

988 }

989

990 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM)

991

992 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)

993 {

994 unsigned long i;

995 TIMEOUT_PARAM tp;

996

997 tp.ctx=s;

998 tp.cache=s->sessions;

999 if (tp.cache == NULL) return;

1000 tp.time=t;

1001 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);

1002 lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout),

1003 TIMEOUT_PARAM, &tp);

1004 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);

1005 }

1006

1007 int ssl_clear_bad_session(SSL *s)

1008 {

1009 if ( (s->session != NULL) &&

1010 !(s->shutdown & SSL_SENT_SHUTDOWN) &&

1011 !(SSL_in_init(s) \|\| SSL_in_before(s)))

1012 {

1013 SSL_CTX_remove_session(s->ctx,s->session);

1014 return(1);

1015 }

1016 else

1017 return(0);

1018 }

1019

1020 /* locked by SSL_CTX in the calling function */

1021 static void SSL_SESSION_list_remove(SSL_CTX ctx, SSL_SESSION s)

1022 {

1023 if ((s->next == NULL) \|\| (s->prev == NULL)) return;

1024

1025 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))

1026 { /* last element in list */

1027 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))

1028 { /* only one element in list */

1029 ctx->session_cache_head=NULL;

1030 ctx->session_cache_tail=NULL;

1031 }

1032 else

1033 {

1034 ctx->session_cache_tail=s->prev;

1035 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);

1036 }

1037 }

1038 else

1039 {

1040 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))

1041 { /* first element in list */

1042 ctx->session_cache_head=s->next;

1043 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);

1044 }

1045 else

1046 { /* middle of list */

1047 s->next->prev=s->prev;

1048 s->prev->next=s->next;

1049 }

1050 }

1051 s->prev=s->next=NULL;

1052 }

1053

1054 static void SSL_SESSION_list_add(SSL_CTX ctx, SSL_SESSION s)

1055 {

1056 if ((s->next != NULL) && (s->prev != NULL))

1057 SSL_SESSION_list_remove(ctx,s);

1058

1059 if (ctx->session_cache_head == NULL)

1060 {

1061 ctx->session_cache_head=s;

1062 ctx->session_cache_tail=s;

1063 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);

1064 s->next=(SSL_SESSION *)&(ctx->session_cache_tail);

1065 }

1066 else

1067 {

1068 s->next=ctx->session_cache_head;

1069 s->next->prev=s;

1070 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);

1071 ctx->session_cache_head=s;

1072 }

1073 }

1074

1075 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,

1076 int (cb)(struct ssl_st ssl,SSL_SESSION *sess))

1077 {

1078 ctx->new_session_cb=cb;

1079 }

1080

1081 int (SSL_CTX_sess_get_new_cb(SSL_CTX ctx))(SSL ssl, SSL_SESSION sess)

1082 {

1083 return ctx->new_session_cb;

1084 }

1085

1086 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,

1087 void (cb)(SSL_CTX ctx,SSL_SESSION *sess))

1088 {

1089 ctx->remove_session_cb=cb;

1090 }

1091

1092 void (SSL_CTX_sess_get_remove_cb(SSL_CTX ctx))(SSL_CTX * ctx,SSL_SESSION *sess )

1093 {

1094 return ctx->remove_session_cb;

1095 }

1096

1097 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,

1098 SSL_SESSION (cb)(struct ssl_st *ssl,

1099 unsigned char data,int len,int copy))

1100 {

1101 ctx->get_session_cb=cb;

1102 }

1103

1104 SSL_SESSION * (SSL_CTX_sess_get_get_cb(SSL_CTX ctx))(SSL *ssl,

1105 unsigned char data,int len,int copy)

1106 {

1107 return ctx->get_session_cb;

1108 }

1109

1110 void SSL_CTX_set_info_callback(SSL_CTX *ctx,

1111 void (cb)(const SSL ssl,int type,int val))

1112 {

1113 ctx->info_callback=cb;

1114 }

1115

1116 void (SSL_CTX_get_info_callback(SSL_CTX ctx))(const SSL *ssl,int type,int val)

1117 {

1118 return ctx->info_callback;

1119 }

1120

1121 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,

1122 int (cb)(SSL ssl, X509 x509, EVP_PKEY pkey))

1123 {

1124 ctx->client_cert_cb=cb;

1125 }

1126

1127 int (SSL_CTX_get_client_cert_cb(SSL_CTX ctx))(SSL * ssl, X509 x509 , EVP_PK EY pkey)

1128 {

1129 return ctx->client_cert_cb;

1130 }

1131

1132 void SSL_CTX_set_channel_id_cb(SSL_CTX *ctx,

1133 void (cb)(SSL ssl, EVP_PKEY **pkey))

1134 {

1135 ctx->channel_id_cb=cb;

1136 }

1137

1138 void (SSL_CTX_get_channel_id_cb(SSL_CTX ctx))(SSL * ssl, EVP_PKEY **pkey)

1139 {

1140 return ctx->channel_id_cb;

1141 }

1142

1143 #ifndef OPENSSL_NO_ENGINE

1144 int SSL_CTX_set_client_cert_engine(SSL_CTX ctx, ENGINE e)

1145 {

1146 if (!ENGINE_init(e))

1147 {

1148 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);

1149 return 0;

1150 }

1151 if(!ENGINE_get_ssl_client_cert_function(e))

1152 {

1153 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, SSL_R_NO_CLIENT_CER T_METHOD);

1154 ENGINE_finish(e);

1155 return 0;

1156 }

1157 ctx->client_cert_engine = e;

1158 return 1;

1159 }

1160 #endif

1161

1162 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,

1163 int (cb)(SSL ssl, unsigned char cookie, unsigned int cookie_len))

1164 {

1165 ctx->app_gen_cookie_cb=cb;

1166 }

1167

1168 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,

1169 int (cb)(SSL ssl, unsigned char *cookie, unsigned int cookie_len))

1170 {

1171 ctx->app_verify_cookie_cb=cb;

1172 }

1173

1174 IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)

OLD	NEW

« no previous file with comments | « openssl/ssl/ssl_rsa.c ('k') | openssl/ssl/ssl_stat.c » ('j') | no next file with comments »