1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] 56 */ 57 /* ==================================================================== 58 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 59 * 60 * Redistribution and use in source and binary forms, with or without 61 * modification, are permitted provided that the following conditions 62 * are met: 63 * 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in 69 * the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3. All advertising materials mentioning features or use of this 73 * software must display the following acknowledgment: 74 * "This product includes software developed by the OpenSSL Project 75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 76 * 77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 78 * endorse or promote products derived from this software without 79 * prior written permission. For written permission, please contact 80 * openssl-core (at) openssl.org. 81 * 82 * 5. Products derived from this software may not be called "OpenSSL" 83 * nor may "OpenSSL" appear in their names without prior written 84 * permission of the OpenSSL Project. 85 * 86 * 6. Redistributions of any form whatsoever must retain the following 87 * acknowledgment: 88 * "This product includes software developed by the OpenSSL Project 89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 102 * OF THE POSSIBILITY OF SUCH DAMAGE. 103 * ==================================================================== 104 * 105 * This product includes cryptographic software written by Eric Young 106 * (eay (at) cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh (at) cryptsoft.com). 108 * 109 */ 110 /* ==================================================================== 111 * Copyright 2005 Nokia. All rights reserved. 112 * 113 * The portions of the attached software ("Contribution") is developed by 114 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 115 * license. 116 * 117 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 118 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 119 * support (see RFC 4279) to OpenSSL. 120 * 121 * No patent licenses or other rights except those expressly stated in 122 * the OpenSSL open source license shall be deemed granted or received 123 * expressly, by implication, estoppel, or otherwise. 124 * 125 * No assurances are provided by Nokia that the Contribution does not 126 * infringe the patent or other intellectual property rights of any third 127 * party or that the license provides you with all the necessary rights 128 * to make use of the Contribution. 129 * 130 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 131 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 132 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 133 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 134 * OTHERWISE. */ 135 136 #include <openssl/ssl.h> 137 138 #include <assert.h> 139 #include <stdlib.h> 140 #include <string.h> 141 142 #include <utility> 143 144 #include <openssl/err.h> 145 #include <openssl/hmac.h> 146 #include <openssl/lhash.h> 147 #include <openssl/mem.h> 148 #include <openssl/rand.h> 149 150 #include "internal.h" 151 #include "../crypto/internal.h" 152 153 154 namespace bssl { 155 156 // The address of this is a magic value, a pointer to which is returned by 157 // SSL_magic_pending_session_ptr(). It allows a session callback to indicate 158 // that it needs to asynchronously fetch session information. 159 static const char g_pending_session_magic = 0; 160 161 static CRYPTO_EX_DATA_CLASS g_ex_data_class = 162 CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA; 163 164 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *session); 165 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *session); 166 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *session, int lock); 167 168 UniquePtr<SSL_SESSION> ssl_session_new(const SSL_X509_METHOD *x509_method) { 169 UniquePtr<SSL_SESSION> session( 170 (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION))); 171 if (!session) { 172 OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); 173 return 0; 174 } 175 OPENSSL_memset(session.get(), 0, sizeof(SSL_SESSION)); 176 177 session->x509_method = x509_method; 178 session->verify_result = X509_V_ERR_INVALID_CALL; 179 session->references = 1; 180 session->timeout = SSL_DEFAULT_SESSION_TIMEOUT; 181 session->auth_timeout = SSL_DEFAULT_SESSION_TIMEOUT; 182 session->time = time(NULL); 183 CRYPTO_new_ex_data(&session->ex_data); 184 return session; 185 } 186 187 UniquePtr<SSL_SESSION> SSL_SESSION_dup(SSL_SESSION *session, int dup_flags) { 188 UniquePtr<SSL_SESSION> new_session = ssl_session_new(session->x509_method); 189 if (!new_session) { 190 return nullptr; 191 } 192 193 new_session->is_server = session->is_server; 194 new_session->ssl_version = session->ssl_version; 195 new_session->sid_ctx_length = session->sid_ctx_length; 196 OPENSSL_memcpy(new_session->sid_ctx, session->sid_ctx, session->sid_ctx_length); 197 198 // Copy the key material. 199 new_session->master_key_length = session->master_key_length; 200 OPENSSL_memcpy(new_session->master_key, session->master_key, 201 session->master_key_length); 202 new_session->cipher = session->cipher; 203 204 // Copy authentication state. 205 if (session->psk_identity != NULL) { 206 new_session->psk_identity = BUF_strdup(session->psk_identity); 207 if (new_session->psk_identity == NULL) { 208 return nullptr; 209 } 210 } 211 if (session->certs != NULL) { 212 new_session->certs = sk_CRYPTO_BUFFER_new_null(); 213 if (new_session->certs == NULL) { 214 return nullptr; 215 } 216 for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(session->certs); i++) { 217 CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(session->certs, i); 218 if (!sk_CRYPTO_BUFFER_push(new_session->certs, buffer)) { 219 return nullptr; 220 } 221 CRYPTO_BUFFER_up_ref(buffer); 222 } 223 } 224 225 if (!session->x509_method->session_dup(new_session.get(), session)) { 226 return nullptr; 227 } 228 229 new_session->verify_result = session->verify_result; 230 231 if (session->ocsp_response != NULL) { 232 new_session->ocsp_response = session->ocsp_response; 233 CRYPTO_BUFFER_up_ref(new_session->ocsp_response); 234 } 235 236 if (session->signed_cert_timestamp_list != NULL) { 237 new_session->signed_cert_timestamp_list = 238 session->signed_cert_timestamp_list; 239 CRYPTO_BUFFER_up_ref(new_session->signed_cert_timestamp_list); 240 } 241 242 OPENSSL_memcpy(new_session->peer_sha256, session->peer_sha256, 243 SHA256_DIGEST_LENGTH); 244 new_session->peer_sha256_valid = session->peer_sha256_valid; 245 246 new_session->peer_signature_algorithm = session->peer_signature_algorithm; 247 248 new_session->timeout = session->timeout; 249 new_session->auth_timeout = session->auth_timeout; 250 new_session->time = session->time; 251 252 // Copy non-authentication connection properties. 253 if (dup_flags & SSL_SESSION_INCLUDE_NONAUTH) { 254 new_session->session_id_length = session->session_id_length; 255 OPENSSL_memcpy(new_session->session_id, session->session_id, 256 session->session_id_length); 257 258 new_session->group_id = session->group_id; 259 260 OPENSSL_memcpy(new_session->original_handshake_hash, 261 session->original_handshake_hash, 262 session->original_handshake_hash_len); 263 new_session->original_handshake_hash_len = 264 session->original_handshake_hash_len; 265 new_session->tlsext_tick_lifetime_hint = session->tlsext_tick_lifetime_hint; 266 new_session->ticket_age_add = session->ticket_age_add; 267 new_session->ticket_max_early_data = session->ticket_max_early_data; 268 new_session->extended_master_secret = session->extended_master_secret; 269 270 if (session->early_alpn != NULL) { 271 new_session->early_alpn = 272 (uint8_t *)BUF_memdup(session->early_alpn, session->early_alpn_len); 273 if (new_session->early_alpn == NULL) { 274 return nullptr; 275 } 276 } 277 new_session->early_alpn_len = session->early_alpn_len; 278 } 279 280 // Copy the ticket. 281 if (dup_flags & SSL_SESSION_INCLUDE_TICKET) { 282 if (session->tlsext_tick != NULL) { 283 new_session->tlsext_tick = 284 (uint8_t *)BUF_memdup(session->tlsext_tick, session->tlsext_ticklen); 285 if (new_session->tlsext_tick == NULL) { 286 return nullptr; 287 } 288 } 289 new_session->tlsext_ticklen = session->tlsext_ticklen; 290 } 291 292 // The new_session does not get a copy of the ex_data. 293 294 new_session->not_resumable = 1; 295 return new_session; 296 } 297 298 void ssl_session_rebase_time(SSL *ssl, SSL_SESSION *session) { 299 struct OPENSSL_timeval now; 300 ssl_get_current_time(ssl, &now); 301 302 // To avoid overflows and underflows, if we've gone back in time, update the 303 // time, but mark the session expired. 304 if (session->time > now.tv_sec) { 305 session->time = now.tv_sec; 306 session->timeout = 0; 307 session->auth_timeout = 0; 308 return; 309 } 310 311 // Adjust the session time and timeouts. If the session has already expired, 312 // clamp the timeouts at zero. 313 uint64_t delta = now.tv_sec - session->time; 314 session->time = now.tv_sec; 315 if (session->timeout < delta) { 316 session->timeout = 0; 317 } else { 318 session->timeout -= delta; 319 } 320 if (session->auth_timeout < delta) { 321 session->auth_timeout = 0; 322 } else { 323 session->auth_timeout -= delta; 324 } 325 } 326 327 void ssl_session_renew_timeout(SSL *ssl, SSL_SESSION *session, 328 uint32_t timeout) { 329 // Rebase the timestamp relative to the current time so |timeout| is measured 330 // correctly. 331 ssl_session_rebase_time(ssl, session); 332 333 if (session->timeout > timeout) { 334 return; 335 } 336 337 session->timeout = timeout; 338 if (session->timeout > session->auth_timeout) { 339 session->timeout = session->auth_timeout; 340 } 341 } 342 343 uint16_t ssl_session_protocol_version(const SSL_SESSION *session) { 344 uint16_t ret; 345 if (!ssl_protocol_version_from_wire(&ret, session->ssl_version)) { 346 // An |SSL_SESSION| will never have an invalid version. This is enforced by 347 // the parser. 348 assert(0); 349 return 0; 350 } 351 352 return ret; 353 } 354 355 const EVP_MD *ssl_session_get_digest(const SSL_SESSION *session) { 356 return ssl_get_handshake_digest(ssl_session_protocol_version(session), 357 session->cipher); 358 } 359 360 int ssl_get_new_session(SSL_HANDSHAKE *hs, int is_server) { 361 SSL *const ssl = hs->ssl; 362 if (ssl->mode & SSL_MODE_NO_SESSION_CREATION) { 363 OPENSSL_PUT_ERROR(SSL, SSL_R_SESSION_MAY_NOT_BE_CREATED); 364 return 0; 365 } 366 367 UniquePtr<SSL_SESSION> session = ssl_session_new(ssl->ctx->x509_method); 368 if (session == NULL) { 369 return 0; 370 } 371 372 session->is_server = is_server; 373 session->ssl_version = ssl->version; 374 375 // Fill in the time from the |SSL_CTX|'s clock. 376 struct OPENSSL_timeval now; 377 ssl_get_current_time(ssl, &now); 378 session->time = now.tv_sec; 379 380 uint16_t version = ssl_protocol_version(ssl); 381 if (version >= TLS1_3_VERSION) { 382 // TLS 1.3 uses tickets as authenticators, so we are willing to use them for 383 // longer. 384 session->timeout = ssl->session_ctx->session_psk_dhe_timeout; 385 session->auth_timeout = SSL_DEFAULT_SESSION_AUTH_TIMEOUT; 386 } else { 387 // TLS 1.2 resumption does not incorporate new key material, so we use a 388 // much shorter timeout. 389 session->timeout = ssl->session_ctx->session_timeout; 390 session->auth_timeout = ssl->session_ctx->session_timeout; 391 } 392 393 if (is_server) { 394 if (hs->ticket_expected || version >= TLS1_3_VERSION) { 395 // Don't set session IDs for sessions resumed with tickets. This will keep 396 // them out of the session cache. 397 session->session_id_length = 0; 398 } else { 399 session->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 400 if (!RAND_bytes(session->session_id, session->session_id_length)) { 401 return 0; 402 } 403 } 404 } else { 405 session->session_id_length = 0; 406 } 407 408 if (ssl->cert->sid_ctx_length > sizeof(session->sid_ctx)) { 409 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 410 return 0; 411 } 412 OPENSSL_memcpy(session->sid_ctx, ssl->cert->sid_ctx, 413 ssl->cert->sid_ctx_length); 414 session->sid_ctx_length = ssl->cert->sid_ctx_length; 415 416 // The session is marked not resumable until it is completely filled in. 417 session->not_resumable = 1; 418 session->verify_result = X509_V_ERR_INVALID_CALL; 419 420 hs->new_session = std::move(session); 421 ssl_set_session(ssl, NULL); 422 return 1; 423 } 424 425 int ssl_ctx_rotate_ticket_encryption_key(SSL_CTX *ctx) { 426 OPENSSL_timeval now; 427 ssl_ctx_get_current_time(ctx, &now); 428 { 429 // Avoid acquiring a write lock in the common case (i.e. a non-default key 430 // is used or the default keys have not expired yet). 431 MutexReadLock lock(&ctx->lock); 432 if (ctx->tlsext_ticket_key_current && 433 (ctx->tlsext_ticket_key_current->next_rotation_tv_sec == 0 || 434 ctx->tlsext_ticket_key_current->next_rotation_tv_sec > now.tv_sec) && 435 (!ctx->tlsext_ticket_key_prev || 436 ctx->tlsext_ticket_key_prev->next_rotation_tv_sec > now.tv_sec)) { 437 return 1; 438 } 439 } 440 441 MutexWriteLock lock(&ctx->lock); 442 if (!ctx->tlsext_ticket_key_current || 443 (ctx->tlsext_ticket_key_current->next_rotation_tv_sec != 0 && 444 ctx->tlsext_ticket_key_current->next_rotation_tv_sec <= now.tv_sec)) { 445 // The current key has not been initialized or it is expired. 446 auto new_key = bssl::MakeUnique<struct tlsext_ticket_key>(); 447 if (!new_key) { 448 return 0; 449 } 450 OPENSSL_memset(new_key.get(), 0, sizeof(struct tlsext_ticket_key)); 451 if (ctx->tlsext_ticket_key_current) { 452 // The current key expired. Rotate it to prev and bump up its rotation 453 // timestamp. Note that even with the new rotation time it may still be 454 // expired and get droppped below. 455 ctx->tlsext_ticket_key_current->next_rotation_tv_sec += 456 SSL_DEFAULT_TICKET_KEY_ROTATION_INTERVAL; 457 OPENSSL_free(ctx->tlsext_ticket_key_prev); 458 ctx->tlsext_ticket_key_prev = ctx->tlsext_ticket_key_current; 459 } 460 ctx->tlsext_ticket_key_current = new_key.release(); 461 RAND_bytes(ctx->tlsext_ticket_key_current->name, 16); 462 RAND_bytes(ctx->tlsext_ticket_key_current->hmac_key, 16); 463 RAND_bytes(ctx->tlsext_ticket_key_current->aes_key, 16); 464 ctx->tlsext_ticket_key_current->next_rotation_tv_sec = 465 now.tv_sec + SSL_DEFAULT_TICKET_KEY_ROTATION_INTERVAL; 466 } 467 468 // Drop an expired prev key. 469 if (ctx->tlsext_ticket_key_prev && 470 ctx->tlsext_ticket_key_prev->next_rotation_tv_sec <= now.tv_sec) { 471 OPENSSL_free(ctx->tlsext_ticket_key_prev); 472 ctx->tlsext_ticket_key_prev = nullptr; 473 } 474 475 return 1; 476 } 477 478 static int ssl_encrypt_ticket_with_cipher_ctx(SSL *ssl, CBB *out, 479 const uint8_t *session_buf, 480 size_t session_len) { 481 ScopedEVP_CIPHER_CTX ctx; 482 ScopedHMAC_CTX hctx; 483 484 // If the session is too long, emit a dummy value rather than abort the 485 // connection. 486 static const size_t kMaxTicketOverhead = 487 16 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE; 488 if (session_len > 0xffff - kMaxTicketOverhead) { 489 static const char kTicketPlaceholder[] = "TICKET TOO LARGE"; 490 return CBB_add_bytes(out, (const uint8_t *)kTicketPlaceholder, 491 strlen(kTicketPlaceholder)); 492 } 493 494 // Initialize HMAC and cipher contexts. If callback present it does all the 495 // work otherwise use generated values from parent ctx. 496 SSL_CTX *tctx = ssl->session_ctx; 497 uint8_t iv[EVP_MAX_IV_LENGTH]; 498 uint8_t key_name[16]; 499 if (tctx->tlsext_ticket_key_cb != NULL) { 500 if (tctx->tlsext_ticket_key_cb(ssl, key_name, iv, ctx.get(), hctx.get(), 501 1 /* encrypt */) < 0) { 502 return 0; 503 } 504 } else { 505 // Rotate ticket key if necessary. 506 if (!ssl_ctx_rotate_ticket_encryption_key(tctx)) { 507 return 0; 508 } 509 MutexReadLock lock(&tctx->lock); 510 if (!RAND_bytes(iv, 16) || 511 !EVP_EncryptInit_ex(ctx.get(), EVP_aes_128_cbc(), NULL, 512 tctx->tlsext_ticket_key_current->aes_key, iv) || 513 !HMAC_Init_ex(hctx.get(), tctx->tlsext_ticket_key_current->hmac_key, 16, 514 tlsext_tick_md(), NULL)) { 515 return 0; 516 } 517 OPENSSL_memcpy(key_name, tctx->tlsext_ticket_key_current->name, 16); 518 } 519 520 uint8_t *ptr; 521 if (!CBB_add_bytes(out, key_name, 16) || 522 !CBB_add_bytes(out, iv, EVP_CIPHER_CTX_iv_length(ctx.get())) || 523 !CBB_reserve(out, &ptr, session_len + EVP_MAX_BLOCK_LENGTH)) { 524 return 0; 525 } 526 527 size_t total = 0; 528 #if defined(BORINGSSL_UNSAFE_FUZZER_MODE) 529 OPENSSL_memcpy(ptr, session_buf, session_len); 530 total = session_len; 531 #else 532 int len; 533 if (!EVP_EncryptUpdate(ctx.get(), ptr + total, &len, session_buf, session_len)) { 534 return 0; 535 } 536 total += len; 537 if (!EVP_EncryptFinal_ex(ctx.get(), ptr + total, &len)) { 538 return 0; 539 } 540 total += len; 541 #endif 542 if (!CBB_did_write(out, total)) { 543 return 0; 544 } 545 546 unsigned hlen; 547 if (!HMAC_Update(hctx.get(), CBB_data(out), CBB_len(out)) || 548 !CBB_reserve(out, &ptr, EVP_MAX_MD_SIZE) || 549 !HMAC_Final(hctx.get(), ptr, &hlen) || 550 !CBB_did_write(out, hlen)) { 551 return 0; 552 } 553 554 return 1; 555 } 556 557 static int ssl_encrypt_ticket_with_method(SSL *ssl, CBB *out, 558 const uint8_t *session_buf, 559 size_t session_len) { 560 const SSL_TICKET_AEAD_METHOD *method = ssl->session_ctx->ticket_aead_method; 561 const size_t max_overhead = method->max_overhead(ssl); 562 const size_t max_out = session_len + max_overhead; 563 if (max_out < max_overhead) { 564 OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); 565 return 0; 566 } 567 568 uint8_t *ptr; 569 if (!CBB_reserve(out, &ptr, max_out)) { 570 return 0; 571 } 572 573 size_t out_len; 574 if (!method->seal(ssl, ptr, &out_len, max_out, session_buf, session_len)) { 575 OPENSSL_PUT_ERROR(SSL, SSL_R_TICKET_ENCRYPTION_FAILED); 576 return 0; 577 } 578 579 if (!CBB_did_write(out, out_len)) { 580 return 0; 581 } 582 583 return 1; 584 } 585 586 int ssl_encrypt_ticket(SSL *ssl, CBB *out, const SSL_SESSION *session) { 587 // Serialize the SSL_SESSION to be encoded into the ticket. 588 uint8_t *session_buf = NULL; 589 size_t session_len; 590 if (!SSL_SESSION_to_bytes_for_ticket(session, &session_buf, &session_len)) { 591 return -1; 592 } 593 594 int ret = 0; 595 if (ssl->session_ctx->ticket_aead_method) { 596 ret = ssl_encrypt_ticket_with_method(ssl, out, session_buf, session_len); 597 } else { 598 ret = 599 ssl_encrypt_ticket_with_cipher_ctx(ssl, out, session_buf, session_len); 600 } 601 602 OPENSSL_free(session_buf); 603 return ret; 604 } 605 606 int ssl_session_is_context_valid(const SSL *ssl, const SSL_SESSION *session) { 607 if (session == NULL) { 608 return 0; 609 } 610 611 return session->sid_ctx_length == ssl->cert->sid_ctx_length && 612 OPENSSL_memcmp(session->sid_ctx, ssl->cert->sid_ctx, 613 ssl->cert->sid_ctx_length) == 0; 614 } 615 616 int ssl_session_is_time_valid(const SSL *ssl, const SSL_SESSION *session) { 617 if (session == NULL) { 618 return 0; 619 } 620 621 struct OPENSSL_timeval now; 622 ssl_get_current_time(ssl, &now); 623 624 // Reject tickets from the future to avoid underflow. 625 if (now.tv_sec < session->time) { 626 return 0; 627 } 628 629 return session->timeout > now.tv_sec - session->time; 630 } 631 632 int ssl_session_is_resumable(const SSL_HANDSHAKE *hs, 633 const SSL_SESSION *session) { 634 const SSL *const ssl = hs->ssl; 635 return ssl_session_is_context_valid(ssl, session) && 636 // The session must have been created by the same type of end point as 637 // we're now using it with. 638 ssl->server == session->is_server && 639 // The session must not be expired. 640 ssl_session_is_time_valid(ssl, session) && 641 /* Only resume if the session's version matches the negotiated 642 * version. */ 643 ssl->version == session->ssl_version && 644 // Only resume if the session's cipher matches the negotiated one. 645 hs->new_cipher == session->cipher && 646 // If the session contains a client certificate (either the full 647 // certificate or just the hash) then require that the form of the 648 // certificate matches the current configuration. 649 ((sk_CRYPTO_BUFFER_num(session->certs) == 0 && 650 !session->peer_sha256_valid) || 651 session->peer_sha256_valid == 652 ssl->retain_only_sha256_of_client_certs); 653 } 654 655 // ssl_lookup_session looks up |session_id| in the session cache and sets 656 // |*out_session| to an |SSL_SESSION| object if found. 657 static enum ssl_hs_wait_t ssl_lookup_session( 658 SSL *ssl, UniquePtr<SSL_SESSION> *out_session, const uint8_t *session_id, 659 size_t session_id_len) { 660 out_session->reset(); 661 662 if (session_id_len == 0 || session_id_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { 663 return ssl_hs_ok; 664 } 665 666 UniquePtr<SSL_SESSION> session; 667 // Try the internal cache, if it exists. 668 if (!(ssl->session_ctx->session_cache_mode & 669 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { 670 SSL_SESSION data; 671 data.ssl_version = ssl->version; 672 data.session_id_length = session_id_len; 673 OPENSSL_memcpy(data.session_id, session_id, session_id_len); 674 675 MutexReadLock lock(&ssl->session_ctx->lock); 676 session.reset(lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &data)); 677 if (session) { 678 // |lh_SSL_SESSION_retrieve| returns a non-owning pointer. 679 SSL_SESSION_up_ref(session.get()); 680 } 681 // TODO(davidben): This should probably move it to the front of the list. 682 } 683 684 // Fall back to the external cache, if it exists. 685 if (!session && (ssl->session_ctx->get_session_cb != nullptr || 686 ssl->session_ctx->get_session_cb_legacy != nullptr)) { 687 int copy = 1; 688 if (ssl->session_ctx->get_session_cb != nullptr) { 689 session.reset(ssl->session_ctx->get_session_cb(ssl, session_id, 690 session_id_len, ©)); 691 } else { 692 session.reset(ssl->session_ctx->get_session_cb_legacy( 693 ssl, const_cast<uint8_t *>(session_id), session_id_len, ©)); 694 } 695 696 if (!session) { 697 return ssl_hs_ok; 698 } 699 700 if (session.get() == SSL_magic_pending_session_ptr()) { 701 session.release(); // This pointer is not actually owned. 702 return ssl_hs_pending_session; 703 } 704 705 // Increment reference count now if the session callback asks us to do so 706 // (note that if the session structures returned by the callback are shared 707 // between threads, it must handle the reference count itself [i.e. copy == 708 // 0], or things won't be thread-safe). 709 if (copy) { 710 SSL_SESSION_up_ref(session.get()); 711 } 712 713 // Add the externally cached session to the internal cache if necessary. 714 if (!(ssl->session_ctx->session_cache_mode & 715 SSL_SESS_CACHE_NO_INTERNAL_STORE)) { 716 SSL_CTX_add_session(ssl->session_ctx, session.get()); 717 } 718 } 719 720 if (session && !ssl_session_is_time_valid(ssl, session.get())) { 721 // The session was from the cache, so remove it. 722 SSL_CTX_remove_session(ssl->session_ctx, session.get()); 723 session.reset(); 724 } 725 726 *out_session = std::move(session); 727 return ssl_hs_ok; 728 } 729 730 enum ssl_hs_wait_t ssl_get_prev_session(SSL *ssl, 731 UniquePtr<SSL_SESSION> *out_session, 732 bool *out_tickets_supported, 733 bool *out_renew_ticket, 734 const SSL_CLIENT_HELLO *client_hello) { 735 // This is used only by servers. 736 assert(ssl->server); 737 UniquePtr<SSL_SESSION> session; 738 bool renew_ticket = false; 739 740 // If tickets are disabled, always behave as if no tickets are present. 741 const uint8_t *ticket = NULL; 742 size_t ticket_len = 0; 743 const bool tickets_supported = 744 !(SSL_get_options(ssl) & SSL_OP_NO_TICKET) && 745 ssl->version > SSL3_VERSION && 746 SSL_early_callback_ctx_extension_get( 747 client_hello, TLSEXT_TYPE_session_ticket, &ticket, &ticket_len); 748 if (tickets_supported && ticket_len > 0) { 749 switch (ssl_process_ticket(ssl, &session, &renew_ticket, ticket, ticket_len, 750 client_hello->session_id, 751 client_hello->session_id_len)) { 752 case ssl_ticket_aead_success: 753 break; 754 case ssl_ticket_aead_ignore_ticket: 755 assert(!session); 756 break; 757 case ssl_ticket_aead_error: 758 return ssl_hs_error; 759 case ssl_ticket_aead_retry: 760 return ssl_hs_pending_ticket; 761 } 762 } else { 763 // The client didn't send a ticket, so the session ID is a real ID. 764 enum ssl_hs_wait_t lookup_ret = ssl_lookup_session( 765 ssl, &session, client_hello->session_id, client_hello->session_id_len); 766 if (lookup_ret != ssl_hs_ok) { 767 return lookup_ret; 768 } 769 } 770 771 *out_session = std::move(session); 772 *out_tickets_supported = tickets_supported; 773 *out_renew_ticket = renew_ticket; 774 return ssl_hs_ok; 775 } 776 777 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *session, int lock) { 778 int ret = 0; 779 780 if (session != NULL && session->session_id_length != 0) { 781 if (lock) { 782 CRYPTO_MUTEX_lock_write(&ctx->lock); 783 } 784 SSL_SESSION *found_session = lh_SSL_SESSION_retrieve(ctx->sessions, 785 session); 786 if (found_session == session) { 787 ret = 1; 788 found_session = lh_SSL_SESSION_delete(ctx->sessions, session); 789 SSL_SESSION_list_remove(ctx, session); 790 } 791 792 if (lock) { 793 CRYPTO_MUTEX_unlock_write(&ctx->lock); 794 } 795 796 if (ret) { 797 if (ctx->remove_session_cb != NULL) { 798 ctx->remove_session_cb(ctx, found_session); 799 } 800 SSL_SESSION_free(found_session); 801 } 802 } 803 804 return ret; 805 } 806 807 void ssl_set_session(SSL *ssl, SSL_SESSION *session) { 808 if (ssl->session == session) { 809 return; 810 } 811 812 SSL_SESSION_free(ssl->session); 813 ssl->session = session; 814 if (session != NULL) { 815 SSL_SESSION_up_ref(session); 816 } 817 } 818 819 // locked by SSL_CTX in the calling function 820 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *session) { 821 if (session->next == NULL || session->prev == NULL) { 822 return; 823 } 824 825 if (session->next == (SSL_SESSION *)&ctx->session_cache_tail) { 826 // last element in list 827 if (session->prev == (SSL_SESSION *)&ctx->session_cache_head) { 828 // only one element in list 829 ctx->session_cache_head = NULL; 830 ctx->session_cache_tail = NULL; 831 } else { 832 ctx->session_cache_tail = session->prev; 833 session->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); 834 } 835 } else { 836 if (session->prev == (SSL_SESSION *)&ctx->session_cache_head) { 837 // first element in list 838 ctx->session_cache_head = session->next; 839 session->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); 840 } else { // middle of list 841 session->next->prev = session->prev; 842 session->prev->next = session->next; 843 } 844 } 845 session->prev = session->next = NULL; 846 } 847 848 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *session) { 849 if (session->next != NULL && session->prev != NULL) { 850 SSL_SESSION_list_remove(ctx, session); 851 } 852 853 if (ctx->session_cache_head == NULL) { 854 ctx->session_cache_head = session; 855 ctx->session_cache_tail = session; 856 session->prev = (SSL_SESSION *)&(ctx->session_cache_head); 857 session->next = (SSL_SESSION *)&(ctx->session_cache_tail); 858 } else { 859 session->next = ctx->session_cache_head; 860 session->next->prev = session; 861 session->prev = (SSL_SESSION *)&(ctx->session_cache_head); 862 ctx->session_cache_head = session; 863 } 864 } 865 866 } // namespace bssl 867 868 using namespace bssl; 869 870 SSL_SESSION *SSL_SESSION_new(const SSL_CTX *ctx) { 871 return ssl_session_new(ctx->x509_method).release(); 872 } 873 874 int SSL_SESSION_up_ref(SSL_SESSION *session) { 875 CRYPTO_refcount_inc(&session->references); 876 return 1; 877 } 878 879 void SSL_SESSION_free(SSL_SESSION *session) { 880 if (session == NULL || 881 !CRYPTO_refcount_dec_and_test_zero(&session->references)) { 882 return; 883 } 884 885 CRYPTO_free_ex_data(&g_ex_data_class, session, &session->ex_data); 886 887 OPENSSL_cleanse(session->master_key, sizeof(session->master_key)); 888 OPENSSL_cleanse(session->session_id, sizeof(session->session_id)); 889 sk_CRYPTO_BUFFER_pop_free(session->certs, CRYPTO_BUFFER_free); 890 session->x509_method->session_clear(session); 891 OPENSSL_free(session->tlsext_tick); 892 CRYPTO_BUFFER_free(session->signed_cert_timestamp_list); 893 CRYPTO_BUFFER_free(session->ocsp_response); 894 OPENSSL_free(session->psk_identity); 895 OPENSSL_free(session->early_alpn); 896 OPENSSL_free(session); 897 } 898 899 const uint8_t *SSL_SESSION_get_id(const SSL_SESSION *session, 900 unsigned *out_len) { 901 if (out_len != NULL) { 902 *out_len = session->session_id_length; 903 } 904 return session->session_id; 905 } 906 907 uint32_t SSL_SESSION_get_timeout(const SSL_SESSION *session) { 908 return session->timeout; 909 } 910 911 uint64_t SSL_SESSION_get_time(const SSL_SESSION *session) { 912 if (session == NULL) { 913 // NULL should crash, but silently accept it here for compatibility. 914 return 0; 915 } 916 return session->time; 917 } 918 919 X509 *SSL_SESSION_get0_peer(const SSL_SESSION *session) { 920 return session->x509_peer; 921 } 922 923 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session, uint8_t *out, 924 size_t max_out) { 925 // TODO(davidben): Fix master_key_length's type and remove these casts. 926 if (max_out == 0) { 927 return (size_t)session->master_key_length; 928 } 929 if (max_out > (size_t)session->master_key_length) { 930 max_out = (size_t)session->master_key_length; 931 } 932 OPENSSL_memcpy(out, session->master_key, max_out); 933 return max_out; 934 } 935 936 uint64_t SSL_SESSION_set_time(SSL_SESSION *session, uint64_t time) { 937 if (session == NULL) { 938 return 0; 939 } 940 941 session->time = time; 942 return time; 943 } 944 945 uint32_t SSL_SESSION_set_timeout(SSL_SESSION *session, uint32_t timeout) { 946 if (session == NULL) { 947 return 0; 948 } 949 950 session->timeout = timeout; 951 session->auth_timeout = timeout; 952 return 1; 953 } 954 955 int SSL_SESSION_set1_id_context(SSL_SESSION *session, const uint8_t *sid_ctx, 956 size_t sid_ctx_len) { 957 if (sid_ctx_len > sizeof(session->sid_ctx)) { 958 OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 959 return 0; 960 } 961 962 static_assert(sizeof(session->sid_ctx) < 256, "sid_ctx_len does not fit"); 963 session->sid_ctx_length = (uint8_t)sid_ctx_len; 964 OPENSSL_memcpy(session->sid_ctx, sid_ctx, sid_ctx_len); 965 966 return 1; 967 } 968 969 int SSL_SESSION_should_be_single_use(const SSL_SESSION *session) { 970 return ssl_session_protocol_version(session) >= TLS1_3_VERSION; 971 } 972 973 int SSL_SESSION_is_resumable(const SSL_SESSION *session) { 974 return !session->not_resumable; 975 } 976 977 int SSL_SESSION_has_ticket(const SSL_SESSION *session) { 978 return session->tlsext_ticklen > 0; 979 } 980 981 void SSL_SESSION_get0_ticket(const SSL_SESSION *session, 982 const uint8_t **out_ticket, size_t *out_len) { 983 if (out_ticket != nullptr) { 984 *out_ticket = session->tlsext_tick; 985 } 986 *out_len = session->tlsext_ticklen; 987 } 988 989 uint32_t SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *session) { 990 return session->tlsext_tick_lifetime_hint; 991 } 992 993 SSL_SESSION *SSL_magic_pending_session_ptr(void) { 994 return (SSL_SESSION *)&g_pending_session_magic; 995 } 996 997 SSL_SESSION *SSL_get_session(const SSL *ssl) { 998 // Once the handshake completes we return the established session. Otherwise 999 // we return the intermediate session, either |session| (for resumption) or 1000 // |new_session| if doing a full handshake. 1001 if (!SSL_in_init(ssl)) { 1002 return ssl->s3->established_session.get(); 1003 } 1004 SSL_HANDSHAKE *hs = ssl->s3->hs.get(); 1005 if (hs->early_session) { 1006 return hs->early_session.get(); 1007 } 1008 if (hs->new_session) { 1009 return hs->new_session.get(); 1010 } 1011 return ssl->session; 1012 } 1013 1014 SSL_SESSION *SSL_get1_session(SSL *ssl) { 1015 SSL_SESSION *ret = SSL_get_session(ssl); 1016 if (ret != NULL) { 1017 SSL_SESSION_up_ref(ret); 1018 } 1019 return ret; 1020 } 1021 1022 int SSL_SESSION_get_ex_new_index(long argl, void *argp, 1023 CRYPTO_EX_unused *unused, 1024 CRYPTO_EX_dup *dup_unused, 1025 CRYPTO_EX_free *free_func) { 1026 int index; 1027 if (!CRYPTO_get_ex_new_index(&g_ex_data_class, &index, argl, argp, 1028 free_func)) { 1029 return -1; 1030 } 1031 return index; 1032 } 1033 1034 int SSL_SESSION_set_ex_data(SSL_SESSION *session, int idx, void *arg) { 1035 return CRYPTO_set_ex_data(&session->ex_data, idx, arg); 1036 } 1037 1038 void *SSL_SESSION_get_ex_data(const SSL_SESSION *session, int idx) { 1039 return CRYPTO_get_ex_data(&session->ex_data, idx); 1040 } 1041 1042 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *session) { 1043 // Although |session| is inserted into two structures (a doubly-linked list 1044 // and the hash table), |ctx| only takes one reference. 1045 SSL_SESSION_up_ref(session); 1046 UniquePtr<SSL_SESSION> owned_session(session); 1047 1048 SSL_SESSION *old_session; 1049 MutexWriteLock lock(&ctx->lock); 1050 if (!lh_SSL_SESSION_insert(ctx->sessions, &old_session, session)) { 1051 return 0; 1052 } 1053 // |ctx->sessions| took ownership of |session| and gave us back a reference to 1054 // |old_session|. (|old_session| may be the same as |session|, in which case 1055 // we traded identical references with |ctx->sessions|.) 1056 owned_session.release(); 1057 owned_session.reset(old_session); 1058 1059 if (old_session != NULL) { 1060 if (old_session == session) { 1061 // |session| was already in the cache. There are no linked list pointers 1062 // to update. 1063 return 0; 1064 } 1065 1066 // There was a session ID collision. |old_session| was replaced with 1067 // |session| in the hash table, so |old_session| must be removed from the 1068 // linked list to match. 1069 SSL_SESSION_list_remove(ctx, old_session); 1070 } 1071 1072 SSL_SESSION_list_add(ctx, session); 1073 1074 // Enforce any cache size limits. 1075 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 1076 while (lh_SSL_SESSION_num_items(ctx->sessions) > 1077 SSL_CTX_sess_get_cache_size(ctx)) { 1078 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) { 1079 break; 1080 } 1081 } 1082 } 1083 1084 return 1; 1085 } 1086 1087 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *session) { 1088 return remove_session_lock(ctx, session, 1); 1089 } 1090 1091 int SSL_set_session(SSL *ssl, SSL_SESSION *session) { 1092 // SSL_set_session may only be called before the handshake has started. 1093 if (ssl->s3->initial_handshake_complete || 1094 ssl->s3->hs == NULL || 1095 ssl->s3->hs->state != 0) { 1096 abort(); 1097 } 1098 1099 ssl_set_session(ssl, session); 1100 return 1; 1101 } 1102 1103 uint32_t SSL_CTX_set_timeout(SSL_CTX *ctx, uint32_t timeout) { 1104 if (ctx == NULL) { 1105 return 0; 1106 } 1107 1108 // Historically, zero was treated as |SSL_DEFAULT_SESSION_TIMEOUT|. 1109 if (timeout == 0) { 1110 timeout = SSL_DEFAULT_SESSION_TIMEOUT; 1111 } 1112 1113 uint32_t old_timeout = ctx->session_timeout; 1114 ctx->session_timeout = timeout; 1115 return old_timeout; 1116 } 1117 1118 uint32_t SSL_CTX_get_timeout(const SSL_CTX *ctx) { 1119 if (ctx == NULL) { 1120 return 0; 1121 } 1122 1123 return ctx->session_timeout; 1124 } 1125 1126 void SSL_CTX_set_session_psk_dhe_timeout(SSL_CTX *ctx, uint32_t timeout) { 1127 ctx->session_psk_dhe_timeout = timeout; 1128 } 1129 1130 typedef struct timeout_param_st { 1131 SSL_CTX *ctx; 1132 uint64_t time; 1133 LHASH_OF(SSL_SESSION) *cache; 1134 } TIMEOUT_PARAM; 1135 1136 static void timeout_doall_arg(SSL_SESSION *session, void *void_param) { 1137 TIMEOUT_PARAM *param = reinterpret_cast<TIMEOUT_PARAM *>(void_param); 1138 1139 if (param->time == 0 || 1140 session->time + session->timeout < session->time || 1141 param->time > (session->time + session->timeout)) { 1142 // The reason we don't call SSL_CTX_remove_session() is to 1143 // save on locking overhead 1144 (void) lh_SSL_SESSION_delete(param->cache, session); 1145 SSL_SESSION_list_remove(param->ctx, session); 1146 if (param->ctx->remove_session_cb != NULL) { 1147 param->ctx->remove_session_cb(param->ctx, session); 1148 } 1149 SSL_SESSION_free(session); 1150 } 1151 } 1152 1153 void SSL_CTX_flush_sessions(SSL_CTX *ctx, uint64_t time) { 1154 TIMEOUT_PARAM tp; 1155 1156 tp.ctx = ctx; 1157 tp.cache = ctx->sessions; 1158 if (tp.cache == NULL) { 1159 return; 1160 } 1161 tp.time = time; 1162 MutexWriteLock lock(&ctx->lock); 1163 lh_SSL_SESSION_doall_arg(tp.cache, timeout_doall_arg, &tp); 1164 } 1165 1166 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1167 int (*cb)(SSL *ssl, SSL_SESSION *session)) { 1168 ctx->new_session_cb = cb; 1169 } 1170 1171 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *session) { 1172 return ctx->new_session_cb; 1173 } 1174 1175 void SSL_CTX_sess_set_remove_cb( 1176 SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *session)) { 1177 ctx->remove_session_cb = cb; 1178 } 1179 1180 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX *ctx, 1181 SSL_SESSION *session) { 1182 return ctx->remove_session_cb; 1183 } 1184 1185 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1186 SSL_SESSION *(*cb)(SSL *ssl, const uint8_t *id, 1187 int id_len, int *out_copy)) { 1188 ctx->get_session_cb = cb; 1189 } 1190 1191 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1192 SSL_SESSION *(*cb)(SSL *ssl, uint8_t *id, 1193 int id_len, int *out_copy)) { 1194 ctx->get_session_cb_legacy = cb; 1195 } 1196 1197 SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, 1198 const uint8_t *id, 1199 int id_len, 1200 int *out_copy) { 1201 return ctx->get_session_cb; 1202 } 1203 1204 void SSL_CTX_set_info_callback( 1205 SSL_CTX *ctx, void (*cb)(const SSL *ssl, int type, int value)) { 1206 ctx->info_callback = cb; 1207 } 1208 1209 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, 1210 int value) { 1211 return ctx->info_callback; 1212 } 1213 1214 void SSL_CTX_set_channel_id_cb(SSL_CTX *ctx, 1215 void (*cb)(SSL *ssl, EVP_PKEY **pkey)) { 1216 ctx->channel_id_cb = cb; 1217 } 1218 1219 void (*SSL_CTX_get_channel_id_cb(SSL_CTX *ctx))(SSL *ssl, EVP_PKEY **pkey) { 1220 return ctx->channel_id_cb; 1221 } 1222