1/* 2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved 4 * Copyright 2005 Nokia. All rights reserved. 5 * 6 * Licensed under the OpenSSL license (the "License"). You may not use 7 * this file except in compliance with the License. You can obtain a copy 8 * in the file LICENSE in the source distribution or at 9 * https://www.openssl.org/source/license.html 10 */ 11 12#include <stdio.h> 13#include "ssl_local.h" 14#include <openssl/objects.h> 15#include <openssl/x509v3.h> 16#include <openssl/rand.h> 17#include <openssl/rand_drbg.h> 18#include <openssl/ocsp.h> 19#include <openssl/dh.h> 20#include <openssl/engine.h> 21#include <openssl/async.h> 22#include <openssl/ct.h> 23#include "internal/cryptlib.h" 24#include "internal/refcount.h" 25 26const char SSL_version_str[] = OPENSSL_VERSION_TEXT; 27 28static int ssl_undefined_function_1(SSL *ssl, SSL3_RECORD *r, size_t s, int t) 29{ 30 (void)r; 31 (void)s; 32 (void)t; 33 return ssl_undefined_function(ssl); 34} 35 36static int ssl_undefined_function_2(SSL *ssl, SSL3_RECORD *r, unsigned char *s, 37 int t) 38{ 39 (void)r; 40 (void)s; 41 (void)t; 42 return ssl_undefined_function(ssl); 43} 44 45static int ssl_undefined_function_3(SSL *ssl, unsigned char *r, 46 unsigned char *s, size_t t, size_t *u) 47{ 48 (void)r; 49 (void)s; 50 (void)t; 51 (void)u; 52 return ssl_undefined_function(ssl); 53} 54 55static int ssl_undefined_function_4(SSL *ssl, int r) 56{ 57 (void)r; 58 return ssl_undefined_function(ssl); 59} 60 61static size_t ssl_undefined_function_5(SSL *ssl, const char *r, size_t s, 62 unsigned char *t) 63{ 64 (void)r; 65 (void)s; 66 (void)t; 67 return ssl_undefined_function(ssl); 68} 69 70static int ssl_undefined_function_6(int r) 71{ 72 (void)r; 73 return ssl_undefined_function(NULL); 74} 75 76static int ssl_undefined_function_7(SSL *ssl, unsigned char *r, size_t s, 77 const char *t, size_t u, 78 const unsigned char *v, size_t w, int x) 79{ 80 (void)r; 81 (void)s; 82 (void)t; 83 (void)u; 84 (void)v; 85 (void)w; 86 (void)x; 87 return ssl_undefined_function(ssl); 88} 89 90SSL3_ENC_METHOD ssl3_undef_enc_method = { 91 ssl_undefined_function_1, 92 ssl_undefined_function_2, 93 ssl_undefined_function, 94 ssl_undefined_function_3, 95 ssl_undefined_function_4, 96 ssl_undefined_function_5, 97 NULL, /* client_finished_label */ 98 0, /* client_finished_label_len */ 99 NULL, /* server_finished_label */ 100 0, /* server_finished_label_len */ 101 ssl_undefined_function_6, 102 ssl_undefined_function_7, 103}; 104 105struct ssl_async_args { 106 SSL *s; 107 void *buf; 108 size_t num; 109 enum { READFUNC, WRITEFUNC, OTHERFUNC } type; 110 union { 111 int (*func_read) (SSL *, void *, size_t, size_t *); 112 int (*func_write) (SSL *, const void *, size_t, size_t *); 113 int (*func_other) (SSL *); 114 } f; 115}; 116 117static const struct { 118 uint8_t mtype; 119 uint8_t ord; 120 int nid; 121} dane_mds[] = { 122 { 123 DANETLS_MATCHING_FULL, 0, NID_undef 124 }, 125 { 126 DANETLS_MATCHING_2256, 1, NID_sha256 127 }, 128 { 129 DANETLS_MATCHING_2512, 2, NID_sha512 130 }, 131}; 132 133static int dane_ctx_enable(struct dane_ctx_st *dctx) 134{ 135 const EVP_MD **mdevp; 136 uint8_t *mdord; 137 uint8_t mdmax = DANETLS_MATCHING_LAST; 138 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */ 139 size_t i; 140 141 if (dctx->mdevp != NULL) 142 return 1; 143 144 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp)); 145 mdord = OPENSSL_zalloc(n * sizeof(*mdord)); 146 147 if (mdord == NULL || mdevp == NULL) { 148 OPENSSL_free(mdord); 149 OPENSSL_free(mdevp); 150 SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE); 151 return 0; 152 } 153 154 /* Install default entries */ 155 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) { 156 const EVP_MD *md; 157 158 if (dane_mds[i].nid == NID_undef || 159 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL) 160 continue; 161 mdevp[dane_mds[i].mtype] = md; 162 mdord[dane_mds[i].mtype] = dane_mds[i].ord; 163 } 164 165 dctx->mdevp = mdevp; 166 dctx->mdord = mdord; 167 dctx->mdmax = mdmax; 168 169 return 1; 170} 171 172static void dane_ctx_final(struct dane_ctx_st *dctx) 173{ 174 OPENSSL_free(dctx->mdevp); 175 dctx->mdevp = NULL; 176 177 OPENSSL_free(dctx->mdord); 178 dctx->mdord = NULL; 179 dctx->mdmax = 0; 180} 181 182static void tlsa_free(danetls_record *t) 183{ 184 if (t == NULL) 185 return; 186 OPENSSL_free(t->data); 187 EVP_PKEY_free(t->spki); 188 OPENSSL_free(t); 189} 190 191static void dane_final(SSL_DANE *dane) 192{ 193 sk_danetls_record_pop_free(dane->trecs, tlsa_free); 194 dane->trecs = NULL; 195 196 sk_X509_pop_free(dane->certs, X509_free); 197 dane->certs = NULL; 198 199 X509_free(dane->mcert); 200 dane->mcert = NULL; 201 dane->mtlsa = NULL; 202 dane->mdpth = -1; 203 dane->pdpth = -1; 204} 205 206/* 207 * dane_copy - Copy dane configuration, sans verification state. 208 */ 209static int ssl_dane_dup(SSL *to, SSL *from) 210{ 211 int num; 212 int i; 213 214 if (!DANETLS_ENABLED(&from->dane)) 215 return 1; 216 217 num = sk_danetls_record_num(from->dane.trecs); 218 dane_final(&to->dane); 219 to->dane.flags = from->dane.flags; 220 to->dane.dctx = &to->ctx->dane; 221 to->dane.trecs = sk_danetls_record_new_reserve(NULL, num); 222 223 if (to->dane.trecs == NULL) { 224 SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE); 225 return 0; 226 } 227 228 for (i = 0; i < num; ++i) { 229 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i); 230 231 if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype, 232 t->data, t->dlen) <= 0) 233 return 0; 234 } 235 return 1; 236} 237 238static int dane_mtype_set(struct dane_ctx_st *dctx, 239 const EVP_MD *md, uint8_t mtype, uint8_t ord) 240{ 241 int i; 242 243 if (mtype == DANETLS_MATCHING_FULL && md != NULL) { 244 SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL); 245 return 0; 246 } 247 248 if (mtype > dctx->mdmax) { 249 const EVP_MD **mdevp; 250 uint8_t *mdord; 251 int n = ((int)mtype) + 1; 252 253 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp)); 254 if (mdevp == NULL) { 255 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE); 256 return -1; 257 } 258 dctx->mdevp = mdevp; 259 260 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord)); 261 if (mdord == NULL) { 262 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE); 263 return -1; 264 } 265 dctx->mdord = mdord; 266 267 /* Zero-fill any gaps */ 268 for (i = dctx->mdmax + 1; i < mtype; ++i) { 269 mdevp[i] = NULL; 270 mdord[i] = 0; 271 } 272 273 dctx->mdmax = mtype; 274 } 275 276 dctx->mdevp[mtype] = md; 277 /* Coerce ordinal of disabled matching types to 0 */ 278 dctx->mdord[mtype] = (md == NULL) ? 0 : ord; 279 280 return 1; 281} 282 283static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype) 284{ 285 if (mtype > dane->dctx->mdmax) 286 return NULL; 287 return dane->dctx->mdevp[mtype]; 288} 289 290static int dane_tlsa_add(SSL_DANE *dane, 291 uint8_t usage, 292 uint8_t selector, 293 uint8_t mtype, unsigned const char *data, size_t dlen) 294{ 295 danetls_record *t; 296 const EVP_MD *md = NULL; 297 int ilen = (int)dlen; 298 int i; 299 int num; 300 301 if (dane->trecs == NULL) { 302 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED); 303 return -1; 304 } 305 306 if (ilen < 0 || dlen != (size_t)ilen) { 307 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH); 308 return 0; 309 } 310 311 if (usage > DANETLS_USAGE_LAST) { 312 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE); 313 return 0; 314 } 315 316 if (selector > DANETLS_SELECTOR_LAST) { 317 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR); 318 return 0; 319 } 320 321 if (mtype != DANETLS_MATCHING_FULL) { 322 md = tlsa_md_get(dane, mtype); 323 if (md == NULL) { 324 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE); 325 return 0; 326 } 327 } 328 329 if (md != NULL && dlen != (size_t)EVP_MD_size(md)) { 330 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH); 331 return 0; 332 } 333 if (!data) { 334 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA); 335 return 0; 336 } 337 338 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) { 339 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); 340 return -1; 341 } 342 343 t->usage = usage; 344 t->selector = selector; 345 t->mtype = mtype; 346 t->data = OPENSSL_malloc(dlen); 347 if (t->data == NULL) { 348 tlsa_free(t); 349 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); 350 return -1; 351 } 352 memcpy(t->data, data, dlen); 353 t->dlen = dlen; 354 355 /* Validate and cache full certificate or public key */ 356 if (mtype == DANETLS_MATCHING_FULL) { 357 const unsigned char *p = data; 358 X509 *cert = NULL; 359 EVP_PKEY *pkey = NULL; 360 361 switch (selector) { 362 case DANETLS_SELECTOR_CERT: 363 if (!d2i_X509(&cert, &p, ilen) || p < data || 364 dlen != (size_t)(p - data)) { 365 tlsa_free(t); 366 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE); 367 return 0; 368 } 369 if (X509_get0_pubkey(cert) == NULL) { 370 tlsa_free(t); 371 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE); 372 return 0; 373 } 374 375 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) { 376 X509_free(cert); 377 break; 378 } 379 380 /* 381 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA 382 * records that contain full certificates of trust-anchors that are 383 * not present in the wire chain. For usage PKIX-TA(0), we augment 384 * the chain with untrusted Full(0) certificates from DNS, in case 385 * they are missing from the chain. 386 */ 387 if ((dane->certs == NULL && 388 (dane->certs = sk_X509_new_null()) == NULL) || 389 !sk_X509_push(dane->certs, cert)) { 390 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); 391 X509_free(cert); 392 tlsa_free(t); 393 return -1; 394 } 395 break; 396 397 case DANETLS_SELECTOR_SPKI: 398 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data || 399 dlen != (size_t)(p - data)) { 400 tlsa_free(t); 401 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY); 402 return 0; 403 } 404 405 /* 406 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA 407 * records that contain full bare keys of trust-anchors that are 408 * not present in the wire chain. 409 */ 410 if (usage == DANETLS_USAGE_DANE_TA) 411 t->spki = pkey; 412 else 413 EVP_PKEY_free(pkey); 414 break; 415 } 416 } 417 418 /*- 419 * Find the right insertion point for the new record. 420 * 421 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that 422 * they can be processed first, as they require no chain building, and no 423 * expiration or hostname checks. Because DANE-EE(3) is numerically 424 * largest, this is accomplished via descending sort by "usage". 425 * 426 * We also sort in descending order by matching ordinal to simplify 427 * the implementation of digest agility in the verification code. 428 * 429 * The choice of order for the selector is not significant, so we 430 * use the same descending order for consistency. 431 */ 432 num = sk_danetls_record_num(dane->trecs); 433 for (i = 0; i < num; ++i) { 434 danetls_record *rec = sk_danetls_record_value(dane->trecs, i); 435 436 if (rec->usage > usage) 437 continue; 438 if (rec->usage < usage) 439 break; 440 if (rec->selector > selector) 441 continue; 442 if (rec->selector < selector) 443 break; 444 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype]) 445 continue; 446 break; 447 } 448 449 if (!sk_danetls_record_insert(dane->trecs, t, i)) { 450 tlsa_free(t); 451 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE); 452 return -1; 453 } 454 dane->umask |= DANETLS_USAGE_BIT(usage); 455 456 return 1; 457} 458 459/* 460 * Return 0 if there is only one version configured and it was disabled 461 * at configure time. Return 1 otherwise. 462 */ 463static int ssl_check_allowed_versions(int min_version, int max_version) 464{ 465 int minisdtls = 0, maxisdtls = 0; 466 467 /* Figure out if we're doing DTLS versions or TLS versions */ 468 if (min_version == DTLS1_BAD_VER 469 || min_version >> 8 == DTLS1_VERSION_MAJOR) 470 minisdtls = 1; 471 if (max_version == DTLS1_BAD_VER 472 || max_version >> 8 == DTLS1_VERSION_MAJOR) 473 maxisdtls = 1; 474 /* A wildcard version of 0 could be DTLS or TLS. */ 475 if ((minisdtls && !maxisdtls && max_version != 0) 476 || (maxisdtls && !minisdtls && min_version != 0)) { 477 /* Mixing DTLS and TLS versions will lead to sadness; deny it. */ 478 return 0; 479 } 480 481 if (minisdtls || maxisdtls) { 482 /* Do DTLS version checks. */ 483 if (min_version == 0) 484 /* Ignore DTLS1_BAD_VER */ 485 min_version = DTLS1_VERSION; 486 if (max_version == 0) 487 max_version = DTLS1_2_VERSION; 488#ifdef OPENSSL_NO_DTLS1_2 489 if (max_version == DTLS1_2_VERSION) 490 max_version = DTLS1_VERSION; 491#endif 492#ifdef OPENSSL_NO_DTLS1 493 if (min_version == DTLS1_VERSION) 494 min_version = DTLS1_2_VERSION; 495#endif 496 /* Done massaging versions; do the check. */ 497 if (0 498#ifdef OPENSSL_NO_DTLS1 499 || (DTLS_VERSION_GE(min_version, DTLS1_VERSION) 500 && DTLS_VERSION_GE(DTLS1_VERSION, max_version)) 501#endif 502#ifdef OPENSSL_NO_DTLS1_2 503 || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION) 504 && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version)) 505#endif 506 ) 507 return 0; 508 } else { 509 /* Regular TLS version checks. */ 510 if (min_version == 0) 511 min_version = SSL3_VERSION; 512 if (max_version == 0) 513 max_version = TLS1_3_VERSION; 514#ifdef OPENSSL_NO_TLS1_3 515 if (max_version == TLS1_3_VERSION) 516 max_version = TLS1_2_VERSION; 517#endif 518#ifdef OPENSSL_NO_TLS1_2 519 if (max_version == TLS1_2_VERSION) 520 max_version = TLS1_1_VERSION; 521#endif 522#ifdef OPENSSL_NO_TLS1_1 523 if (max_version == TLS1_1_VERSION) 524 max_version = TLS1_VERSION; 525#endif 526#ifdef OPENSSL_NO_TLS1 527 if (max_version == TLS1_VERSION) 528 max_version = SSL3_VERSION; 529#endif 530#ifdef OPENSSL_NO_SSL3 531 if (min_version == SSL3_VERSION) 532 min_version = TLS1_VERSION; 533#endif 534#ifdef OPENSSL_NO_TLS1 535 if (min_version == TLS1_VERSION) 536 min_version = TLS1_1_VERSION; 537#endif 538#ifdef OPENSSL_NO_TLS1_1 539 if (min_version == TLS1_1_VERSION) 540 min_version = TLS1_2_VERSION; 541#endif 542#ifdef OPENSSL_NO_TLS1_2 543 if (min_version == TLS1_2_VERSION) 544 min_version = TLS1_3_VERSION; 545#endif 546 /* Done massaging versions; do the check. */ 547 if (0 548#ifdef OPENSSL_NO_SSL3 549 || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version) 550#endif 551#ifdef OPENSSL_NO_TLS1 552 || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version) 553#endif 554#ifdef OPENSSL_NO_TLS1_1 555 || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version) 556#endif 557#ifdef OPENSSL_NO_TLS1_2 558 || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version) 559#endif 560#ifdef OPENSSL_NO_TLS1_3 561 || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version) 562#endif 563 ) 564 return 0; 565 } 566 return 1; 567} 568 569static void clear_ciphers(SSL *s) 570{ 571 /* clear the current cipher */ 572 ssl_clear_cipher_ctx(s); 573 ssl_clear_hash_ctx(&s->read_hash); 574 ssl_clear_hash_ctx(&s->write_hash); 575} 576 577int SSL_clear(SSL *s) 578{ 579 if (s->method == NULL) { 580 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); 581 return 0; 582 } 583 584 if (ssl_clear_bad_session(s)) { 585 SSL_SESSION_free(s->session); 586 s->session = NULL; 587 } 588 SSL_SESSION_free(s->psksession); 589 s->psksession = NULL; 590 OPENSSL_free(s->psksession_id); 591 s->psksession_id = NULL; 592 s->psksession_id_len = 0; 593 s->hello_retry_request = 0; 594 s->sent_tickets = 0; 595 596 s->error = 0; 597 s->hit = 0; 598 s->shutdown = 0; 599 600 if (s->renegotiate) { 601 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); 602 return 0; 603 } 604 605 ossl_statem_clear(s); 606 607 s->version = s->method->version; 608 s->client_version = s->version; 609 s->rwstate = SSL_NOTHING; 610 611 BUF_MEM_free(s->init_buf); 612 s->init_buf = NULL; 613 clear_ciphers(s); 614 s->first_packet = 0; 615 616 s->key_update = SSL_KEY_UPDATE_NONE; 617 618 EVP_MD_CTX_free(s->pha_dgst); 619 s->pha_dgst = NULL; 620 621 /* Reset DANE verification result state */ 622 s->dane.mdpth = -1; 623 s->dane.pdpth = -1; 624 X509_free(s->dane.mcert); 625 s->dane.mcert = NULL; 626 s->dane.mtlsa = NULL; 627 628 /* Clear the verification result peername */ 629 X509_VERIFY_PARAM_move_peername(s->param, NULL); 630 631 /* Clear any shared connection state */ 632 OPENSSL_free(s->shared_sigalgs); 633 s->shared_sigalgs = NULL; 634 s->shared_sigalgslen = 0; 635 636 /* 637 * Check to see if we were changed into a different method, if so, revert 638 * back. 639 */ 640 if (s->method != s->ctx->method) { 641 s->method->ssl_free(s); 642 s->method = s->ctx->method; 643 if (!s->method->ssl_new(s)) 644 return 0; 645 } else { 646 if (!s->method->ssl_clear(s)) 647 return 0; 648 } 649 650 RECORD_LAYER_clear(&s->rlayer); 651 652 return 1; 653} 654 655/** Used to change an SSL_CTXs default SSL method type */ 656int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) 657{ 658 STACK_OF(SSL_CIPHER) *sk; 659 660 ctx->method = meth; 661 662 if (!SSL_CTX_set_ciphersuites(ctx, TLS_DEFAULT_CIPHERSUITES)) { 663 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); 664 return 0; 665 } 666 sk = ssl_create_cipher_list(ctx->method, 667 ctx->tls13_ciphersuites, 668 &(ctx->cipher_list), 669 &(ctx->cipher_list_by_id), 670 SSL_DEFAULT_CIPHER_LIST, ctx->cert); 671 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { 672 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); 673 return 0; 674 } 675 return 1; 676} 677 678SSL *SSL_new(SSL_CTX *ctx) 679{ 680 SSL *s; 681 682 if (ctx == NULL) { 683 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX); 684 return NULL; 685 } 686 if (ctx->method == NULL) { 687 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); 688 return NULL; 689 } 690 691 s = OPENSSL_zalloc(sizeof(*s)); 692 if (s == NULL) 693 goto err; 694 695 s->references = 1; 696 s->lock = CRYPTO_THREAD_lock_new(); 697 if (s->lock == NULL) { 698 OPENSSL_free(s); 699 s = NULL; 700 goto err; 701 } 702 703 RECORD_LAYER_init(&s->rlayer, s); 704 705 s->options = ctx->options; 706 s->dane.flags = ctx->dane.flags; 707 s->min_proto_version = ctx->min_proto_version; 708 s->max_proto_version = ctx->max_proto_version; 709 s->mode = ctx->mode; 710 s->max_cert_list = ctx->max_cert_list; 711 s->max_early_data = ctx->max_early_data; 712 s->recv_max_early_data = ctx->recv_max_early_data; 713 s->num_tickets = ctx->num_tickets; 714 s->pha_enabled = ctx->pha_enabled; 715 716 /* Shallow copy of the ciphersuites stack */ 717 s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites); 718 if (s->tls13_ciphersuites == NULL) 719 goto err; 720 721 /* 722 * Earlier library versions used to copy the pointer to the CERT, not 723 * its contents; only when setting new parameters for the per-SSL 724 * copy, ssl_cert_new would be called (and the direct reference to 725 * the per-SSL_CTX settings would be lost, but those still were 726 * indirectly accessed for various purposes, and for that reason they 727 * used to be known as s->ctx->default_cert). Now we don't look at the 728 * SSL_CTX's CERT after having duplicated it once. 729 */ 730 s->cert = ssl_cert_dup(ctx->cert); 731 if (s->cert == NULL) 732 goto err; 733 734 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead); 735 s->msg_callback = ctx->msg_callback; 736 s->msg_callback_arg = ctx->msg_callback_arg; 737 s->verify_mode = ctx->verify_mode; 738 s->not_resumable_session_cb = ctx->not_resumable_session_cb; 739 s->record_padding_cb = ctx->record_padding_cb; 740 s->record_padding_arg = ctx->record_padding_arg; 741 s->block_padding = ctx->block_padding; 742 s->sid_ctx_length = ctx->sid_ctx_length; 743 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx))) 744 goto err; 745 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); 746 s->verify_callback = ctx->default_verify_callback; 747 s->generate_session_id = ctx->generate_session_id; 748 749 s->param = X509_VERIFY_PARAM_new(); 750 if (s->param == NULL) 751 goto err; 752 X509_VERIFY_PARAM_inherit(s->param, ctx->param); 753 s->quiet_shutdown = ctx->quiet_shutdown; 754 755 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode; 756 s->max_send_fragment = ctx->max_send_fragment; 757 s->split_send_fragment = ctx->split_send_fragment; 758 s->max_pipelines = ctx->max_pipelines; 759 if (s->max_pipelines > 1) 760 RECORD_LAYER_set_read_ahead(&s->rlayer, 1); 761 if (ctx->default_read_buf_len > 0) 762 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len); 763 764 SSL_CTX_up_ref(ctx); 765 s->ctx = ctx; 766 s->ext.debug_cb = 0; 767 s->ext.debug_arg = NULL; 768 s->ext.ticket_expected = 0; 769 s->ext.status_type = ctx->ext.status_type; 770 s->ext.status_expected = 0; 771 s->ext.ocsp.ids = NULL; 772 s->ext.ocsp.exts = NULL; 773 s->ext.ocsp.resp = NULL; 774 s->ext.ocsp.resp_len = 0; 775 SSL_CTX_up_ref(ctx); 776 s->session_ctx = ctx; 777#ifndef OPENSSL_NO_EC 778 if (ctx->ext.ecpointformats) { 779 s->ext.ecpointformats = 780 OPENSSL_memdup(ctx->ext.ecpointformats, 781 ctx->ext.ecpointformats_len); 782 if (!s->ext.ecpointformats) { 783 s->ext.ecpointformats_len = 0; 784 goto err; 785 } 786 s->ext.ecpointformats_len = 787 ctx->ext.ecpointformats_len; 788 } 789 if (ctx->ext.supportedgroups) { 790 s->ext.supportedgroups = 791 OPENSSL_memdup(ctx->ext.supportedgroups, 792 ctx->ext.supportedgroups_len 793 * sizeof(*ctx->ext.supportedgroups)); 794 if (!s->ext.supportedgroups) { 795 s->ext.supportedgroups_len = 0; 796 goto err; 797 } 798 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len; 799 } 800#endif 801#ifndef OPENSSL_NO_NEXTPROTONEG 802 s->ext.npn = NULL; 803#endif 804 805 if (s->ctx->ext.alpn) { 806 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len); 807 if (s->ext.alpn == NULL) { 808 s->ext.alpn_len = 0; 809 goto err; 810 } 811 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len); 812 s->ext.alpn_len = s->ctx->ext.alpn_len; 813 } 814 815 s->verified_chain = NULL; 816 s->verify_result = X509_V_OK; 817 818 s->default_passwd_callback = ctx->default_passwd_callback; 819 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata; 820 821 s->method = ctx->method; 822 823 s->key_update = SSL_KEY_UPDATE_NONE; 824 825 s->allow_early_data_cb = ctx->allow_early_data_cb; 826 s->allow_early_data_cb_data = ctx->allow_early_data_cb_data; 827 828 if (!s->method->ssl_new(s)) 829 goto err; 830 831 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1; 832 833 if (!SSL_clear(s)) 834 goto err; 835 836 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data)) 837 goto err; 838 839#ifndef OPENSSL_NO_PSK 840 s->psk_client_callback = ctx->psk_client_callback; 841 s->psk_server_callback = ctx->psk_server_callback; 842#endif 843 s->psk_find_session_cb = ctx->psk_find_session_cb; 844 s->psk_use_session_cb = ctx->psk_use_session_cb; 845 846 s->job = NULL; 847 848#ifndef OPENSSL_NO_CT 849 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback, 850 ctx->ct_validation_callback_arg)) 851 goto err; 852#endif 853 854 return s; 855 err: 856 SSL_free(s); 857 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); 858 return NULL; 859} 860 861int SSL_is_dtls(const SSL *s) 862{ 863 return SSL_IS_DTLS(s) ? 1 : 0; 864} 865 866int SSL_up_ref(SSL *s) 867{ 868 int i; 869 870 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0) 871 return 0; 872 873 REF_PRINT_COUNT("SSL", s); 874 REF_ASSERT_ISNT(i < 2); 875 return ((i > 1) ? 1 : 0); 876} 877 878int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, 879 unsigned int sid_ctx_len) 880{ 881 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 882 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, 883 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 884 return 0; 885 } 886 ctx->sid_ctx_length = sid_ctx_len; 887 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); 888 889 return 1; 890} 891 892int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, 893 unsigned int sid_ctx_len) 894{ 895 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 896 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, 897 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 898 return 0; 899 } 900 ssl->sid_ctx_length = sid_ctx_len; 901 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); 902 903 return 1; 904} 905 906int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) 907{ 908 CRYPTO_THREAD_write_lock(ctx->lock); 909 ctx->generate_session_id = cb; 910 CRYPTO_THREAD_unlock(ctx->lock); 911 return 1; 912} 913 914int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) 915{ 916 CRYPTO_THREAD_write_lock(ssl->lock); 917 ssl->generate_session_id = cb; 918 CRYPTO_THREAD_unlock(ssl->lock); 919 return 1; 920} 921 922int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, 923 unsigned int id_len) 924{ 925 /* 926 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how 927 * we can "construct" a session to give us the desired check - i.e. to 928 * find if there's a session in the hash table that would conflict with 929 * any new session built out of this id/id_len and the ssl_version in use 930 * by this SSL. 931 */ 932 SSL_SESSION r, *p; 933 934 if (id_len > sizeof(r.session_id)) 935 return 0; 936 937 r.ssl_version = ssl->version; 938 r.session_id_length = id_len; 939 memcpy(r.session_id, id, id_len); 940 941 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock); 942 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r); 943 CRYPTO_THREAD_unlock(ssl->session_ctx->lock); 944 return (p != NULL); 945} 946 947int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 948{ 949 return X509_VERIFY_PARAM_set_purpose(s->param, purpose); 950} 951 952int SSL_set_purpose(SSL *s, int purpose) 953{ 954 return X509_VERIFY_PARAM_set_purpose(s->param, purpose); 955} 956 957int SSL_CTX_set_trust(SSL_CTX *s, int trust) 958{ 959 return X509_VERIFY_PARAM_set_trust(s->param, trust); 960} 961 962int SSL_set_trust(SSL *s, int trust) 963{ 964 return X509_VERIFY_PARAM_set_trust(s->param, trust); 965} 966 967int SSL_set1_host(SSL *s, const char *hostname) 968{ 969 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0); 970} 971 972int SSL_add1_host(SSL *s, const char *hostname) 973{ 974 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0); 975} 976 977void SSL_set_hostflags(SSL *s, unsigned int flags) 978{ 979 X509_VERIFY_PARAM_set_hostflags(s->param, flags); 980} 981 982const char *SSL_get0_peername(SSL *s) 983{ 984 return X509_VERIFY_PARAM_get0_peername(s->param); 985} 986 987int SSL_CTX_dane_enable(SSL_CTX *ctx) 988{ 989 return dane_ctx_enable(&ctx->dane); 990} 991 992unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags) 993{ 994 unsigned long orig = ctx->dane.flags; 995 996 ctx->dane.flags |= flags; 997 return orig; 998} 999 1000unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags) 1001{ 1002 unsigned long orig = ctx->dane.flags; 1003 1004 ctx->dane.flags &= ~flags; 1005 return orig; 1006} 1007 1008int SSL_dane_enable(SSL *s, const char *basedomain) 1009{ 1010 SSL_DANE *dane = &s->dane; 1011 1012 if (s->ctx->dane.mdmax == 0) { 1013 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED); 1014 return 0; 1015 } 1016 if (dane->trecs != NULL) { 1017 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED); 1018 return 0; 1019 } 1020 1021 /* 1022 * Default SNI name. This rejects empty names, while set1_host below 1023 * accepts them and disables host name checks. To avoid side-effects with 1024 * invalid input, set the SNI name first. 1025 */ 1026 if (s->ext.hostname == NULL) { 1027 if (!SSL_set_tlsext_host_name(s, basedomain)) { 1028 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN); 1029 return -1; 1030 } 1031 } 1032 1033 /* Primary RFC6125 reference identifier */ 1034 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) { 1035 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN); 1036 return -1; 1037 } 1038 1039 dane->mdpth = -1; 1040 dane->pdpth = -1; 1041 dane->dctx = &s->ctx->dane; 1042 dane->trecs = sk_danetls_record_new_null(); 1043 1044 if (dane->trecs == NULL) { 1045 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE); 1046 return -1; 1047 } 1048 return 1; 1049} 1050 1051unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags) 1052{ 1053 unsigned long orig = ssl->dane.flags; 1054 1055 ssl->dane.flags |= flags; 1056 return orig; 1057} 1058 1059unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags) 1060{ 1061 unsigned long orig = ssl->dane.flags; 1062 1063 ssl->dane.flags &= ~flags; 1064 return orig; 1065} 1066 1067int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki) 1068{ 1069 SSL_DANE *dane = &s->dane; 1070 1071 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK) 1072 return -1; 1073 if (dane->mtlsa) { 1074 if (mcert) 1075 *mcert = dane->mcert; 1076 if (mspki) 1077 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL; 1078 } 1079 return dane->mdpth; 1080} 1081 1082int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector, 1083 uint8_t *mtype, unsigned const char **data, size_t *dlen) 1084{ 1085 SSL_DANE *dane = &s->dane; 1086 1087 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK) 1088 return -1; 1089 if (dane->mtlsa) { 1090 if (usage) 1091 *usage = dane->mtlsa->usage; 1092 if (selector) 1093 *selector = dane->mtlsa->selector; 1094 if (mtype) 1095 *mtype = dane->mtlsa->mtype; 1096 if (data) 1097 *data = dane->mtlsa->data; 1098 if (dlen) 1099 *dlen = dane->mtlsa->dlen; 1100 } 1101 return dane->mdpth; 1102} 1103 1104SSL_DANE *SSL_get0_dane(SSL *s) 1105{ 1106 return &s->dane; 1107} 1108 1109int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector, 1110 uint8_t mtype, unsigned const char *data, size_t dlen) 1111{ 1112 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen); 1113} 1114 1115int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype, 1116 uint8_t ord) 1117{ 1118 return dane_mtype_set(&ctx->dane, md, mtype, ord); 1119} 1120 1121int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 1122{ 1123 return X509_VERIFY_PARAM_set1(ctx->param, vpm); 1124} 1125 1126int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 1127{ 1128 return X509_VERIFY_PARAM_set1(ssl->param, vpm); 1129} 1130 1131X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) 1132{ 1133 return ctx->param; 1134} 1135 1136X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) 1137{ 1138 return ssl->param; 1139} 1140 1141void SSL_certs_clear(SSL *s) 1142{ 1143 ssl_cert_clear_certs(s->cert); 1144} 1145 1146void SSL_free(SSL *s) 1147{ 1148 int i; 1149 1150 if (s == NULL) 1151 return; 1152 CRYPTO_DOWN_REF(&s->references, &i, s->lock); 1153 REF_PRINT_COUNT("SSL", s); 1154 if (i > 0) 1155 return; 1156 REF_ASSERT_ISNT(i < 0); 1157 1158 X509_VERIFY_PARAM_free(s->param); 1159 dane_final(&s->dane); 1160 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); 1161 1162 /* Ignore return value */ 1163 ssl_free_wbio_buffer(s); 1164 1165 BIO_free_all(s->wbio); 1166 BIO_free_all(s->rbio); 1167 1168 BUF_MEM_free(s->init_buf); 1169 1170 /* add extra stuff */ 1171 sk_SSL_CIPHER_free(s->cipher_list); 1172 sk_SSL_CIPHER_free(s->cipher_list_by_id); 1173 sk_SSL_CIPHER_free(s->tls13_ciphersuites); 1174 sk_SSL_CIPHER_free(s->peer_ciphers); 1175 1176 /* Make the next call work :-) */ 1177 if (s->session != NULL) { 1178 ssl_clear_bad_session(s); 1179 SSL_SESSION_free(s->session); 1180 } 1181 SSL_SESSION_free(s->psksession); 1182 OPENSSL_free(s->psksession_id); 1183 1184 clear_ciphers(s); 1185 1186 ssl_cert_free(s->cert); 1187 OPENSSL_free(s->shared_sigalgs); 1188 /* Free up if allocated */ 1189 1190 OPENSSL_free(s->ext.hostname); 1191 SSL_CTX_free(s->session_ctx); 1192#ifndef OPENSSL_NO_EC 1193 OPENSSL_free(s->ext.ecpointformats); 1194 OPENSSL_free(s->ext.peer_ecpointformats); 1195 OPENSSL_free(s->ext.supportedgroups); 1196 OPENSSL_free(s->ext.peer_supportedgroups); 1197#endif /* OPENSSL_NO_EC */ 1198 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free); 1199#ifndef OPENSSL_NO_OCSP 1200 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free); 1201#endif 1202#ifndef OPENSSL_NO_CT 1203 SCT_LIST_free(s->scts); 1204 OPENSSL_free(s->ext.scts); 1205#endif 1206 OPENSSL_free(s->ext.ocsp.resp); 1207 OPENSSL_free(s->ext.alpn); 1208 OPENSSL_free(s->ext.tls13_cookie); 1209 if (s->clienthello != NULL) 1210 OPENSSL_free(s->clienthello->pre_proc_exts); 1211 OPENSSL_free(s->clienthello); 1212 OPENSSL_free(s->pha_context); 1213 EVP_MD_CTX_free(s->pha_dgst); 1214 1215 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free); 1216 sk_X509_NAME_pop_free(s->client_ca_names, X509_NAME_free); 1217 1218 sk_X509_pop_free(s->verified_chain, X509_free); 1219 1220 if (s->method != NULL) 1221 s->method->ssl_free(s); 1222 1223 RECORD_LAYER_release(&s->rlayer); 1224 1225 SSL_CTX_free(s->ctx); 1226 1227 ASYNC_WAIT_CTX_free(s->waitctx); 1228 1229#if !defined(OPENSSL_NO_NEXTPROTONEG) 1230 OPENSSL_free(s->ext.npn); 1231#endif 1232 1233#ifndef OPENSSL_NO_SRTP 1234 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); 1235#endif 1236 1237 CRYPTO_THREAD_lock_free(s->lock); 1238 1239 OPENSSL_free(s); 1240} 1241 1242void SSL_set0_rbio(SSL *s, BIO *rbio) 1243{ 1244 BIO_free_all(s->rbio); 1245 s->rbio = rbio; 1246} 1247 1248void SSL_set0_wbio(SSL *s, BIO *wbio) 1249{ 1250 /* 1251 * If the output buffering BIO is still in place, remove it 1252 */ 1253 if (s->bbio != NULL) 1254 s->wbio = BIO_pop(s->wbio); 1255 1256 BIO_free_all(s->wbio); 1257 s->wbio = wbio; 1258 1259 /* Re-attach |bbio| to the new |wbio|. */ 1260 if (s->bbio != NULL) 1261 s->wbio = BIO_push(s->bbio, s->wbio); 1262} 1263 1264void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) 1265{ 1266 /* 1267 * For historical reasons, this function has many different cases in 1268 * ownership handling. 1269 */ 1270 1271 /* If nothing has changed, do nothing */ 1272 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s)) 1273 return; 1274 1275 /* 1276 * If the two arguments are equal then one fewer reference is granted by the 1277 * caller than we want to take 1278 */ 1279 if (rbio != NULL && rbio == wbio) 1280 BIO_up_ref(rbio); 1281 1282 /* 1283 * If only the wbio is changed only adopt one reference. 1284 */ 1285 if (rbio == SSL_get_rbio(s)) { 1286 SSL_set0_wbio(s, wbio); 1287 return; 1288 } 1289 /* 1290 * There is an asymmetry here for historical reasons. If only the rbio is 1291 * changed AND the rbio and wbio were originally different, then we only 1292 * adopt one reference. 1293 */ 1294 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) { 1295 SSL_set0_rbio(s, rbio); 1296 return; 1297 } 1298 1299 /* Otherwise, adopt both references. */ 1300 SSL_set0_rbio(s, rbio); 1301 SSL_set0_wbio(s, wbio); 1302} 1303 1304BIO *SSL_get_rbio(const SSL *s) 1305{ 1306 return s->rbio; 1307} 1308 1309BIO *SSL_get_wbio(const SSL *s) 1310{ 1311 if (s->bbio != NULL) { 1312 /* 1313 * If |bbio| is active, the true caller-configured BIO is its 1314 * |next_bio|. 1315 */ 1316 return BIO_next(s->bbio); 1317 } 1318 return s->wbio; 1319} 1320 1321int SSL_get_fd(const SSL *s) 1322{ 1323 return SSL_get_rfd(s); 1324} 1325 1326int SSL_get_rfd(const SSL *s) 1327{ 1328 int ret = -1; 1329 BIO *b, *r; 1330 1331 b = SSL_get_rbio(s); 1332 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 1333 if (r != NULL) 1334 BIO_get_fd(r, &ret); 1335 return ret; 1336} 1337 1338int SSL_get_wfd(const SSL *s) 1339{ 1340 int ret = -1; 1341 BIO *b, *r; 1342 1343 b = SSL_get_wbio(s); 1344 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); 1345 if (r != NULL) 1346 BIO_get_fd(r, &ret); 1347 return ret; 1348} 1349 1350#ifndef OPENSSL_NO_SOCK 1351int SSL_set_fd(SSL *s, int fd) 1352{ 1353 int ret = 0; 1354 BIO *bio = NULL; 1355 1356 bio = BIO_new(BIO_s_socket()); 1357 1358 if (bio == NULL) { 1359 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); 1360 goto err; 1361 } 1362 BIO_set_fd(bio, fd, BIO_NOCLOSE); 1363 SSL_set_bio(s, bio, bio); 1364 ret = 1; 1365 err: 1366 return ret; 1367} 1368 1369int SSL_set_wfd(SSL *s, int fd) 1370{ 1371 BIO *rbio = SSL_get_rbio(s); 1372 1373 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET 1374 || (int)BIO_get_fd(rbio, NULL) != fd) { 1375 BIO *bio = BIO_new(BIO_s_socket()); 1376 1377 if (bio == NULL) { 1378 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); 1379 return 0; 1380 } 1381 BIO_set_fd(bio, fd, BIO_NOCLOSE); 1382 SSL_set0_wbio(s, bio); 1383 } else { 1384 BIO_up_ref(rbio); 1385 SSL_set0_wbio(s, rbio); 1386 } 1387 return 1; 1388} 1389 1390int SSL_set_rfd(SSL *s, int fd) 1391{ 1392 BIO *wbio = SSL_get_wbio(s); 1393 1394 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET 1395 || ((int)BIO_get_fd(wbio, NULL) != fd)) { 1396 BIO *bio = BIO_new(BIO_s_socket()); 1397 1398 if (bio == NULL) { 1399 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); 1400 return 0; 1401 } 1402 BIO_set_fd(bio, fd, BIO_NOCLOSE); 1403 SSL_set0_rbio(s, bio); 1404 } else { 1405 BIO_up_ref(wbio); 1406 SSL_set0_rbio(s, wbio); 1407 } 1408 1409 return 1; 1410} 1411#endif 1412 1413/* return length of latest Finished message we sent, copy to 'buf' */ 1414size_t SSL_get_finished(const SSL *s, void *buf, size_t count) 1415{ 1416 size_t ret = 0; 1417 1418 if (s->s3 != NULL) { 1419 ret = s->s3->tmp.finish_md_len; 1420 if (count > ret) 1421 count = ret; 1422 memcpy(buf, s->s3->tmp.finish_md, count); 1423 } 1424 return ret; 1425} 1426 1427/* return length of latest Finished message we expected, copy to 'buf' */ 1428size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count) 1429{ 1430 size_t ret = 0; 1431 1432 if (s->s3 != NULL) { 1433 ret = s->s3->tmp.peer_finish_md_len; 1434 if (count > ret) 1435 count = ret; 1436 memcpy(buf, s->s3->tmp.peer_finish_md, count); 1437 } 1438 return ret; 1439} 1440 1441int SSL_get_verify_mode(const SSL *s) 1442{ 1443 return s->verify_mode; 1444} 1445 1446int SSL_get_verify_depth(const SSL *s) 1447{ 1448 return X509_VERIFY_PARAM_get_depth(s->param); 1449} 1450 1451int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) { 1452 return s->verify_callback; 1453} 1454 1455int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 1456{ 1457 return ctx->verify_mode; 1458} 1459 1460int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 1461{ 1462 return X509_VERIFY_PARAM_get_depth(ctx->param); 1463} 1464 1465int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) { 1466 return ctx->default_verify_callback; 1467} 1468 1469void SSL_set_verify(SSL *s, int mode, 1470 int (*callback) (int ok, X509_STORE_CTX *ctx)) 1471{ 1472 s->verify_mode = mode; 1473 if (callback != NULL) 1474 s->verify_callback = callback; 1475} 1476 1477void SSL_set_verify_depth(SSL *s, int depth) 1478{ 1479 X509_VERIFY_PARAM_set_depth(s->param, depth); 1480} 1481 1482void SSL_set_read_ahead(SSL *s, int yes) 1483{ 1484 RECORD_LAYER_set_read_ahead(&s->rlayer, yes); 1485} 1486 1487int SSL_get_read_ahead(const SSL *s) 1488{ 1489 return RECORD_LAYER_get_read_ahead(&s->rlayer); 1490} 1491 1492int SSL_pending(const SSL *s) 1493{ 1494 size_t pending = s->method->ssl_pending(s); 1495 1496 /* 1497 * SSL_pending cannot work properly if read-ahead is enabled 1498 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is 1499 * impossible to fix since SSL_pending cannot report errors that may be 1500 * observed while scanning the new data. (Note that SSL_pending() is 1501 * often used as a boolean value, so we'd better not return -1.) 1502 * 1503 * SSL_pending also cannot work properly if the value >INT_MAX. In that case 1504 * we just return INT_MAX. 1505 */ 1506 return pending < INT_MAX ? (int)pending : INT_MAX; 1507} 1508 1509int SSL_has_pending(const SSL *s) 1510{ 1511 /* 1512 * Similar to SSL_pending() but returns a 1 to indicate that we have 1513 * unprocessed data available or 0 otherwise (as opposed to the number of 1514 * bytes available). Unlike SSL_pending() this will take into account 1515 * read_ahead data. A 1 return simply indicates that we have unprocessed 1516 * data. That data may not result in any application data, or we may fail 1517 * to parse the records for some reason. 1518 */ 1519 if (RECORD_LAYER_processed_read_pending(&s->rlayer)) 1520 return 1; 1521 1522 return RECORD_LAYER_read_pending(&s->rlayer); 1523} 1524 1525X509 *SSL_get_peer_certificate(const SSL *s) 1526{ 1527 X509 *r; 1528 1529 if ((s == NULL) || (s->session == NULL)) 1530 r = NULL; 1531 else 1532 r = s->session->peer; 1533 1534 if (r == NULL) 1535 return r; 1536 1537 X509_up_ref(r); 1538 1539 return r; 1540} 1541 1542STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s) 1543{ 1544 STACK_OF(X509) *r; 1545 1546 if ((s == NULL) || (s->session == NULL)) 1547 r = NULL; 1548 else 1549 r = s->session->peer_chain; 1550 1551 /* 1552 * If we are a client, cert_chain includes the peer's own certificate; if 1553 * we are a server, it does not. 1554 */ 1555 1556 return r; 1557} 1558 1559/* 1560 * Now in theory, since the calling process own 't' it should be safe to 1561 * modify. We need to be able to read f without being hassled 1562 */ 1563int SSL_copy_session_id(SSL *t, const SSL *f) 1564{ 1565 int i; 1566 /* Do we need to to SSL locking? */ 1567 if (!SSL_set_session(t, SSL_get_session(f))) { 1568 return 0; 1569 } 1570 1571 /* 1572 * what if we are setup for one protocol version but want to talk another 1573 */ 1574 if (t->method != f->method) { 1575 t->method->ssl_free(t); 1576 t->method = f->method; 1577 if (t->method->ssl_new(t) == 0) 1578 return 0; 1579 } 1580 1581 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock); 1582 ssl_cert_free(t->cert); 1583 t->cert = f->cert; 1584 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) { 1585 return 0; 1586 } 1587 1588 return 1; 1589} 1590 1591/* Fix this so it checks all the valid key/cert options */ 1592int SSL_CTX_check_private_key(const SSL_CTX *ctx) 1593{ 1594 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) { 1595 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); 1596 return 0; 1597 } 1598 if (ctx->cert->key->privatekey == NULL) { 1599 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED); 1600 return 0; 1601 } 1602 return X509_check_private_key 1603 (ctx->cert->key->x509, ctx->cert->key->privatekey); 1604} 1605 1606/* Fix this function so that it takes an optional type parameter */ 1607int SSL_check_private_key(const SSL *ssl) 1608{ 1609 if (ssl == NULL) { 1610 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER); 1611 return 0; 1612 } 1613 if (ssl->cert->key->x509 == NULL) { 1614 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); 1615 return 0; 1616 } 1617 if (ssl->cert->key->privatekey == NULL) { 1618 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED); 1619 return 0; 1620 } 1621 return X509_check_private_key(ssl->cert->key->x509, 1622 ssl->cert->key->privatekey); 1623} 1624 1625int SSL_waiting_for_async(SSL *s) 1626{ 1627 if (s->job) 1628 return 1; 1629 1630 return 0; 1631} 1632 1633int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds) 1634{ 1635 ASYNC_WAIT_CTX *ctx = s->waitctx; 1636 1637 if (ctx == NULL) 1638 return 0; 1639 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds); 1640} 1641 1642int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds, 1643 OSSL_ASYNC_FD *delfd, size_t *numdelfds) 1644{ 1645 ASYNC_WAIT_CTX *ctx = s->waitctx; 1646 1647 if (ctx == NULL) 1648 return 0; 1649 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd, 1650 numdelfds); 1651} 1652 1653int SSL_accept(SSL *s) 1654{ 1655 if (s->handshake_func == NULL) { 1656 /* Not properly initialized yet */ 1657 SSL_set_accept_state(s); 1658 } 1659 1660 return SSL_do_handshake(s); 1661} 1662 1663int SSL_connect(SSL *s) 1664{ 1665 if (s->handshake_func == NULL) { 1666 /* Not properly initialized yet */ 1667 SSL_set_connect_state(s); 1668 } 1669 1670 return SSL_do_handshake(s); 1671} 1672 1673long SSL_get_default_timeout(const SSL *s) 1674{ 1675 return s->method->get_timeout(); 1676} 1677 1678static int ssl_start_async_job(SSL *s, struct ssl_async_args *args, 1679 int (*func) (void *)) 1680{ 1681 int ret; 1682 if (s->waitctx == NULL) { 1683 s->waitctx = ASYNC_WAIT_CTX_new(); 1684 if (s->waitctx == NULL) 1685 return -1; 1686 } 1687 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args, 1688 sizeof(struct ssl_async_args))) { 1689 case ASYNC_ERR: 1690 s->rwstate = SSL_NOTHING; 1691 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC); 1692 return -1; 1693 case ASYNC_PAUSE: 1694 s->rwstate = SSL_ASYNC_PAUSED; 1695 return -1; 1696 case ASYNC_NO_JOBS: 1697 s->rwstate = SSL_ASYNC_NO_JOBS; 1698 return -1; 1699 case ASYNC_FINISH: 1700 s->job = NULL; 1701 return ret; 1702 default: 1703 s->rwstate = SSL_NOTHING; 1704 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR); 1705 /* Shouldn't happen */ 1706 return -1; 1707 } 1708} 1709 1710static int ssl_io_intern(void *vargs) 1711{ 1712 struct ssl_async_args *args; 1713 SSL *s; 1714 void *buf; 1715 size_t num; 1716 1717 args = (struct ssl_async_args *)vargs; 1718 s = args->s; 1719 buf = args->buf; 1720 num = args->num; 1721 switch (args->type) { 1722 case READFUNC: 1723 return args->f.func_read(s, buf, num, &s->asyncrw); 1724 case WRITEFUNC: 1725 return args->f.func_write(s, buf, num, &s->asyncrw); 1726 case OTHERFUNC: 1727 return args->f.func_other(s); 1728 } 1729 return -1; 1730} 1731 1732int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes) 1733{ 1734 if (s->handshake_func == NULL) { 1735 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED); 1736 return -1; 1737 } 1738 1739 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 1740 s->rwstate = SSL_NOTHING; 1741 return 0; 1742 } 1743 1744 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY 1745 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) { 1746 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1747 return 0; 1748 } 1749 /* 1750 * If we are a client and haven't received the ServerHello etc then we 1751 * better do that 1752 */ 1753 ossl_statem_check_finish_init(s, 0); 1754 1755 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 1756 struct ssl_async_args args; 1757 int ret; 1758 1759 args.s = s; 1760 args.buf = buf; 1761 args.num = num; 1762 args.type = READFUNC; 1763 args.f.func_read = s->method->ssl_read; 1764 1765 ret = ssl_start_async_job(s, &args, ssl_io_intern); 1766 *readbytes = s->asyncrw; 1767 return ret; 1768 } else { 1769 return s->method->ssl_read(s, buf, num, readbytes); 1770 } 1771} 1772 1773int SSL_read(SSL *s, void *buf, int num) 1774{ 1775 int ret; 1776 size_t readbytes; 1777 1778 if (num < 0) { 1779 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH); 1780 return -1; 1781 } 1782 1783 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes); 1784 1785 /* 1786 * The cast is safe here because ret should be <= INT_MAX because num is 1787 * <= INT_MAX 1788 */ 1789 if (ret > 0) 1790 ret = (int)readbytes; 1791 1792 return ret; 1793} 1794 1795int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes) 1796{ 1797 int ret = ssl_read_internal(s, buf, num, readbytes); 1798 1799 if (ret < 0) 1800 ret = 0; 1801 return ret; 1802} 1803 1804int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes) 1805{ 1806 int ret; 1807 1808 if (!s->server) { 1809 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1810 return SSL_READ_EARLY_DATA_ERROR; 1811 } 1812 1813 switch (s->early_data_state) { 1814 case SSL_EARLY_DATA_NONE: 1815 if (!SSL_in_before(s)) { 1816 SSLerr(SSL_F_SSL_READ_EARLY_DATA, 1817 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1818 return SSL_READ_EARLY_DATA_ERROR; 1819 } 1820 /* fall through */ 1821 1822 case SSL_EARLY_DATA_ACCEPT_RETRY: 1823 s->early_data_state = SSL_EARLY_DATA_ACCEPTING; 1824 ret = SSL_accept(s); 1825 if (ret <= 0) { 1826 /* NBIO or error */ 1827 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY; 1828 return SSL_READ_EARLY_DATA_ERROR; 1829 } 1830 /* fall through */ 1831 1832 case SSL_EARLY_DATA_READ_RETRY: 1833 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { 1834 s->early_data_state = SSL_EARLY_DATA_READING; 1835 ret = SSL_read_ex(s, buf, num, readbytes); 1836 /* 1837 * State machine will update early_data_state to 1838 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData 1839 * message 1840 */ 1841 if (ret > 0 || (ret <= 0 && s->early_data_state 1842 != SSL_EARLY_DATA_FINISHED_READING)) { 1843 s->early_data_state = SSL_EARLY_DATA_READ_RETRY; 1844 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS 1845 : SSL_READ_EARLY_DATA_ERROR; 1846 } 1847 } else { 1848 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING; 1849 } 1850 *readbytes = 0; 1851 return SSL_READ_EARLY_DATA_FINISH; 1852 1853 default: 1854 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1855 return SSL_READ_EARLY_DATA_ERROR; 1856 } 1857} 1858 1859int SSL_get_early_data_status(const SSL *s) 1860{ 1861 return s->ext.early_data; 1862} 1863 1864static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes) 1865{ 1866 if (s->handshake_func == NULL) { 1867 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED); 1868 return -1; 1869 } 1870 1871 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 1872 return 0; 1873 } 1874 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 1875 struct ssl_async_args args; 1876 int ret; 1877 1878 args.s = s; 1879 args.buf = buf; 1880 args.num = num; 1881 args.type = READFUNC; 1882 args.f.func_read = s->method->ssl_peek; 1883 1884 ret = ssl_start_async_job(s, &args, ssl_io_intern); 1885 *readbytes = s->asyncrw; 1886 return ret; 1887 } else { 1888 return s->method->ssl_peek(s, buf, num, readbytes); 1889 } 1890} 1891 1892int SSL_peek(SSL *s, void *buf, int num) 1893{ 1894 int ret; 1895 size_t readbytes; 1896 1897 if (num < 0) { 1898 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH); 1899 return -1; 1900 } 1901 1902 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes); 1903 1904 /* 1905 * The cast is safe here because ret should be <= INT_MAX because num is 1906 * <= INT_MAX 1907 */ 1908 if (ret > 0) 1909 ret = (int)readbytes; 1910 1911 return ret; 1912} 1913 1914 1915int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes) 1916{ 1917 int ret = ssl_peek_internal(s, buf, num, readbytes); 1918 1919 if (ret < 0) 1920 ret = 0; 1921 return ret; 1922} 1923 1924int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written) 1925{ 1926 if (s->handshake_func == NULL) { 1927 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED); 1928 return -1; 1929 } 1930 1931 if (s->shutdown & SSL_SENT_SHUTDOWN) { 1932 s->rwstate = SSL_NOTHING; 1933 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN); 1934 return -1; 1935 } 1936 1937 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY 1938 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY 1939 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) { 1940 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1941 return 0; 1942 } 1943 /* If we are a client and haven't sent the Finished we better do that */ 1944 ossl_statem_check_finish_init(s, 1); 1945 1946 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 1947 int ret; 1948 struct ssl_async_args args; 1949 1950 args.s = s; 1951 args.buf = (void *)buf; 1952 args.num = num; 1953 args.type = WRITEFUNC; 1954 args.f.func_write = s->method->ssl_write; 1955 1956 ret = ssl_start_async_job(s, &args, ssl_io_intern); 1957 *written = s->asyncrw; 1958 return ret; 1959 } else { 1960 return s->method->ssl_write(s, buf, num, written); 1961 } 1962} 1963 1964int SSL_write(SSL *s, const void *buf, int num) 1965{ 1966 int ret; 1967 size_t written; 1968 1969 if (num < 0) { 1970 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH); 1971 return -1; 1972 } 1973 1974 ret = ssl_write_internal(s, buf, (size_t)num, &written); 1975 1976 /* 1977 * The cast is safe here because ret should be <= INT_MAX because num is 1978 * <= INT_MAX 1979 */ 1980 if (ret > 0) 1981 ret = (int)written; 1982 1983 return ret; 1984} 1985 1986int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written) 1987{ 1988 int ret = ssl_write_internal(s, buf, num, written); 1989 1990 if (ret < 0) 1991 ret = 0; 1992 return ret; 1993} 1994 1995int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written) 1996{ 1997 int ret, early_data_state; 1998 size_t writtmp; 1999 uint32_t partialwrite; 2000 2001 switch (s->early_data_state) { 2002 case SSL_EARLY_DATA_NONE: 2003 if (s->server 2004 || !SSL_in_before(s) 2005 || ((s->session == NULL || s->session->ext.max_early_data == 0) 2006 && (s->psk_use_session_cb == NULL))) { 2007 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, 2008 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2009 return 0; 2010 } 2011 /* fall through */ 2012 2013 case SSL_EARLY_DATA_CONNECT_RETRY: 2014 s->early_data_state = SSL_EARLY_DATA_CONNECTING; 2015 ret = SSL_connect(s); 2016 if (ret <= 0) { 2017 /* NBIO or error */ 2018 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY; 2019 return 0; 2020 } 2021 /* fall through */ 2022 2023 case SSL_EARLY_DATA_WRITE_RETRY: 2024 s->early_data_state = SSL_EARLY_DATA_WRITING; 2025 /* 2026 * We disable partial write for early data because we don't keep track 2027 * of how many bytes we've written between the SSL_write_ex() call and 2028 * the flush if the flush needs to be retried) 2029 */ 2030 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE; 2031 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE; 2032 ret = SSL_write_ex(s, buf, num, &writtmp); 2033 s->mode |= partialwrite; 2034 if (!ret) { 2035 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY; 2036 return ret; 2037 } 2038 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH; 2039 /* fall through */ 2040 2041 case SSL_EARLY_DATA_WRITE_FLUSH: 2042 /* The buffering BIO is still in place so we need to flush it */ 2043 if (statem_flush(s) != 1) 2044 return 0; 2045 *written = num; 2046 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY; 2047 return 1; 2048 2049 case SSL_EARLY_DATA_FINISHED_READING: 2050 case SSL_EARLY_DATA_READ_RETRY: 2051 early_data_state = s->early_data_state; 2052 /* We are a server writing to an unauthenticated client */ 2053 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING; 2054 ret = SSL_write_ex(s, buf, num, written); 2055 /* The buffering BIO is still in place */ 2056 if (ret) 2057 (void)BIO_flush(s->wbio); 2058 s->early_data_state = early_data_state; 2059 return ret; 2060 2061 default: 2062 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2063 return 0; 2064 } 2065} 2066 2067int SSL_shutdown(SSL *s) 2068{ 2069 /* 2070 * Note that this function behaves differently from what one might 2071 * expect. Return values are 0 for no success (yet), 1 for success; but 2072 * calling it once is usually not enough, even if blocking I/O is used 2073 * (see ssl3_shutdown). 2074 */ 2075 2076 if (s->handshake_func == NULL) { 2077 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); 2078 return -1; 2079 } 2080 2081 if (!SSL_in_init(s)) { 2082 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 2083 struct ssl_async_args args; 2084 2085 args.s = s; 2086 args.type = OTHERFUNC; 2087 args.f.func_other = s->method->ssl_shutdown; 2088 2089 return ssl_start_async_job(s, &args, ssl_io_intern); 2090 } else { 2091 return s->method->ssl_shutdown(s); 2092 } 2093 } else { 2094 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT); 2095 return -1; 2096 } 2097} 2098 2099int SSL_key_update(SSL *s, int updatetype) 2100{ 2101 /* 2102 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been 2103 * negotiated, and that it is appropriate to call SSL_key_update() instead 2104 * of SSL_renegotiate(). 2105 */ 2106 if (!SSL_IS_TLS13(s)) { 2107 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION); 2108 return 0; 2109 } 2110 2111 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED 2112 && updatetype != SSL_KEY_UPDATE_REQUESTED) { 2113 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE); 2114 return 0; 2115 } 2116 2117 if (!SSL_is_init_finished(s)) { 2118 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT); 2119 return 0; 2120 } 2121 2122 ossl_statem_set_in_init(s, 1); 2123 s->key_update = updatetype; 2124 return 1; 2125} 2126 2127int SSL_get_key_update_type(const SSL *s) 2128{ 2129 return s->key_update; 2130} 2131 2132int SSL_renegotiate(SSL *s) 2133{ 2134 if (SSL_IS_TLS13(s)) { 2135 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION); 2136 return 0; 2137 } 2138 2139 if ((s->options & SSL_OP_NO_RENEGOTIATION)) { 2140 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION); 2141 return 0; 2142 } 2143 2144 s->renegotiate = 1; 2145 s->new_session = 1; 2146 2147 return s->method->ssl_renegotiate(s); 2148} 2149 2150int SSL_renegotiate_abbreviated(SSL *s) 2151{ 2152 if (SSL_IS_TLS13(s)) { 2153 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION); 2154 return 0; 2155 } 2156 2157 if ((s->options & SSL_OP_NO_RENEGOTIATION)) { 2158 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION); 2159 return 0; 2160 } 2161 2162 s->renegotiate = 1; 2163 s->new_session = 0; 2164 2165 return s->method->ssl_renegotiate(s); 2166} 2167 2168int SSL_renegotiate_pending(const SSL *s) 2169{ 2170 /* 2171 * becomes true when negotiation is requested; false again once a 2172 * handshake has finished 2173 */ 2174 return (s->renegotiate != 0); 2175} 2176 2177long SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 2178{ 2179 long l; 2180 2181 switch (cmd) { 2182 case SSL_CTRL_GET_READ_AHEAD: 2183 return RECORD_LAYER_get_read_ahead(&s->rlayer); 2184 case SSL_CTRL_SET_READ_AHEAD: 2185 l = RECORD_LAYER_get_read_ahead(&s->rlayer); 2186 RECORD_LAYER_set_read_ahead(&s->rlayer, larg); 2187 return l; 2188 2189 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 2190 s->msg_callback_arg = parg; 2191 return 1; 2192 2193 case SSL_CTRL_MODE: 2194 return (s->mode |= larg); 2195 case SSL_CTRL_CLEAR_MODE: 2196 return (s->mode &= ~larg); 2197 case SSL_CTRL_GET_MAX_CERT_LIST: 2198 return (long)s->max_cert_list; 2199 case SSL_CTRL_SET_MAX_CERT_LIST: 2200 if (larg < 0) 2201 return 0; 2202 l = (long)s->max_cert_list; 2203 s->max_cert_list = (size_t)larg; 2204 return l; 2205 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 2206 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 2207 return 0; 2208 s->max_send_fragment = larg; 2209 if (s->max_send_fragment < s->split_send_fragment) 2210 s->split_send_fragment = s->max_send_fragment; 2211 return 1; 2212 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT: 2213 if ((size_t)larg > s->max_send_fragment || larg == 0) 2214 return 0; 2215 s->split_send_fragment = larg; 2216 return 1; 2217 case SSL_CTRL_SET_MAX_PIPELINES: 2218 if (larg < 1 || larg > SSL_MAX_PIPELINES) 2219 return 0; 2220 s->max_pipelines = larg; 2221 if (larg > 1) 2222 RECORD_LAYER_set_read_ahead(&s->rlayer, 1); 2223 return 1; 2224 case SSL_CTRL_GET_RI_SUPPORT: 2225 if (s->s3) 2226 return s->s3->send_connection_binding; 2227 else 2228 return 0; 2229 case SSL_CTRL_CERT_FLAGS: 2230 return (s->cert->cert_flags |= larg); 2231 case SSL_CTRL_CLEAR_CERT_FLAGS: 2232 return (s->cert->cert_flags &= ~larg); 2233 2234 case SSL_CTRL_GET_RAW_CIPHERLIST: 2235 if (parg) { 2236 if (s->s3->tmp.ciphers_raw == NULL) 2237 return 0; 2238 *(unsigned char **)parg = s->s3->tmp.ciphers_raw; 2239 return (int)s->s3->tmp.ciphers_rawlen; 2240 } else { 2241 return TLS_CIPHER_LEN; 2242 } 2243 case SSL_CTRL_GET_EXTMS_SUPPORT: 2244 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s)) 2245 return -1; 2246 if (s->session->flags & SSL_SESS_FLAG_EXTMS) 2247 return 1; 2248 else 2249 return 0; 2250 case SSL_CTRL_SET_MIN_PROTO_VERSION: 2251 return ssl_check_allowed_versions(larg, s->max_proto_version) 2252 && ssl_set_version_bound(s->ctx->method->version, (int)larg, 2253 &s->min_proto_version); 2254 case SSL_CTRL_GET_MIN_PROTO_VERSION: 2255 return s->min_proto_version; 2256 case SSL_CTRL_SET_MAX_PROTO_VERSION: 2257 return ssl_check_allowed_versions(s->min_proto_version, larg) 2258 && ssl_set_version_bound(s->ctx->method->version, (int)larg, 2259 &s->max_proto_version); 2260 case SSL_CTRL_GET_MAX_PROTO_VERSION: 2261 return s->max_proto_version; 2262 default: 2263 return s->method->ssl_ctrl(s, cmd, larg, parg); 2264 } 2265} 2266 2267long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void)) 2268{ 2269 switch (cmd) { 2270 case SSL_CTRL_SET_MSG_CALLBACK: 2271 s->msg_callback = (void (*) 2272 (int write_p, int version, int content_type, 2273 const void *buf, size_t len, SSL *ssl, 2274 void *arg))(fp); 2275 return 1; 2276 2277 default: 2278 return s->method->ssl_callback_ctrl(s, cmd, fp); 2279 } 2280} 2281 2282LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx) 2283{ 2284 return ctx->sessions; 2285} 2286 2287long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 2288{ 2289 long l; 2290 /* For some cases with ctx == NULL perform syntax checks */ 2291 if (ctx == NULL) { 2292 switch (cmd) { 2293#ifndef OPENSSL_NO_EC 2294 case SSL_CTRL_SET_GROUPS_LIST: 2295 return tls1_set_groups_list(NULL, NULL, parg); 2296#endif 2297 case SSL_CTRL_SET_SIGALGS_LIST: 2298 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST: 2299 return tls1_set_sigalgs_list(NULL, parg, 0); 2300 default: 2301 return 0; 2302 } 2303 } 2304 2305 switch (cmd) { 2306 case SSL_CTRL_GET_READ_AHEAD: 2307 return ctx->read_ahead; 2308 case SSL_CTRL_SET_READ_AHEAD: 2309 l = ctx->read_ahead; 2310 ctx->read_ahead = larg; 2311 return l; 2312 2313 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 2314 ctx->msg_callback_arg = parg; 2315 return 1; 2316 2317 case SSL_CTRL_GET_MAX_CERT_LIST: 2318 return (long)ctx->max_cert_list; 2319 case SSL_CTRL_SET_MAX_CERT_LIST: 2320 if (larg < 0) 2321 return 0; 2322 l = (long)ctx->max_cert_list; 2323 ctx->max_cert_list = (size_t)larg; 2324 return l; 2325 2326 case SSL_CTRL_SET_SESS_CACHE_SIZE: 2327 if (larg < 0) 2328 return 0; 2329 l = (long)ctx->session_cache_size; 2330 ctx->session_cache_size = (size_t)larg; 2331 return l; 2332 case SSL_CTRL_GET_SESS_CACHE_SIZE: 2333 return (long)ctx->session_cache_size; 2334 case SSL_CTRL_SET_SESS_CACHE_MODE: 2335 l = ctx->session_cache_mode; 2336 ctx->session_cache_mode = larg; 2337 return l; 2338 case SSL_CTRL_GET_SESS_CACHE_MODE: 2339 return ctx->session_cache_mode; 2340 2341 case SSL_CTRL_SESS_NUMBER: 2342 return lh_SSL_SESSION_num_items(ctx->sessions); 2343 case SSL_CTRL_SESS_CONNECT: 2344 return tsan_load(&ctx->stats.sess_connect); 2345 case SSL_CTRL_SESS_CONNECT_GOOD: 2346 return tsan_load(&ctx->stats.sess_connect_good); 2347 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 2348 return tsan_load(&ctx->stats.sess_connect_renegotiate); 2349 case SSL_CTRL_SESS_ACCEPT: 2350 return tsan_load(&ctx->stats.sess_accept); 2351 case SSL_CTRL_SESS_ACCEPT_GOOD: 2352 return tsan_load(&ctx->stats.sess_accept_good); 2353 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 2354 return tsan_load(&ctx->stats.sess_accept_renegotiate); 2355 case SSL_CTRL_SESS_HIT: 2356 return tsan_load(&ctx->stats.sess_hit); 2357 case SSL_CTRL_SESS_CB_HIT: 2358 return tsan_load(&ctx->stats.sess_cb_hit); 2359 case SSL_CTRL_SESS_MISSES: 2360 return tsan_load(&ctx->stats.sess_miss); 2361 case SSL_CTRL_SESS_TIMEOUTS: 2362 return tsan_load(&ctx->stats.sess_timeout); 2363 case SSL_CTRL_SESS_CACHE_FULL: 2364 return tsan_load(&ctx->stats.sess_cache_full); 2365 case SSL_CTRL_MODE: 2366 return (ctx->mode |= larg); 2367 case SSL_CTRL_CLEAR_MODE: 2368 return (ctx->mode &= ~larg); 2369 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 2370 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 2371 return 0; 2372 ctx->max_send_fragment = larg; 2373 if (ctx->max_send_fragment < ctx->split_send_fragment) 2374 ctx->split_send_fragment = ctx->max_send_fragment; 2375 return 1; 2376 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT: 2377 if ((size_t)larg > ctx->max_send_fragment || larg == 0) 2378 return 0; 2379 ctx->split_send_fragment = larg; 2380 return 1; 2381 case SSL_CTRL_SET_MAX_PIPELINES: 2382 if (larg < 1 || larg > SSL_MAX_PIPELINES) 2383 return 0; 2384 ctx->max_pipelines = larg; 2385 return 1; 2386 case SSL_CTRL_CERT_FLAGS: 2387 return (ctx->cert->cert_flags |= larg); 2388 case SSL_CTRL_CLEAR_CERT_FLAGS: 2389 return (ctx->cert->cert_flags &= ~larg); 2390 case SSL_CTRL_SET_MIN_PROTO_VERSION: 2391 return ssl_check_allowed_versions(larg, ctx->max_proto_version) 2392 && ssl_set_version_bound(ctx->method->version, (int)larg, 2393 &ctx->min_proto_version); 2394 case SSL_CTRL_GET_MIN_PROTO_VERSION: 2395 return ctx->min_proto_version; 2396 case SSL_CTRL_SET_MAX_PROTO_VERSION: 2397 return ssl_check_allowed_versions(ctx->min_proto_version, larg) 2398 && ssl_set_version_bound(ctx->method->version, (int)larg, 2399 &ctx->max_proto_version); 2400 case SSL_CTRL_GET_MAX_PROTO_VERSION: 2401 return ctx->max_proto_version; 2402 default: 2403 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg); 2404 } 2405} 2406 2407long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void)) 2408{ 2409 switch (cmd) { 2410 case SSL_CTRL_SET_MSG_CALLBACK: 2411 ctx->msg_callback = (void (*) 2412 (int write_p, int version, int content_type, 2413 const void *buf, size_t len, SSL *ssl, 2414 void *arg))(fp); 2415 return 1; 2416 2417 default: 2418 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp); 2419 } 2420} 2421 2422int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 2423{ 2424 if (a->id > b->id) 2425 return 1; 2426 if (a->id < b->id) 2427 return -1; 2428 return 0; 2429} 2430 2431int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap, 2432 const SSL_CIPHER *const *bp) 2433{ 2434 if ((*ap)->id > (*bp)->id) 2435 return 1; 2436 if ((*ap)->id < (*bp)->id) 2437 return -1; 2438 return 0; 2439} 2440 2441/** return a STACK of the ciphers available for the SSL and in order of 2442 * preference */ 2443STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s) 2444{ 2445 if (s != NULL) { 2446 if (s->cipher_list != NULL) { 2447 return s->cipher_list; 2448 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 2449 return s->ctx->cipher_list; 2450 } 2451 } 2452 return NULL; 2453} 2454 2455STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s) 2456{ 2457 if ((s == NULL) || !s->server) 2458 return NULL; 2459 return s->peer_ciphers; 2460} 2461 2462STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s) 2463{ 2464 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers; 2465 int i; 2466 2467 ciphers = SSL_get_ciphers(s); 2468 if (!ciphers) 2469 return NULL; 2470 if (!ssl_set_client_disabled(s)) 2471 return NULL; 2472 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { 2473 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i); 2474 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) { 2475 if (!sk) 2476 sk = sk_SSL_CIPHER_new_null(); 2477 if (!sk) 2478 return NULL; 2479 if (!sk_SSL_CIPHER_push(sk, c)) { 2480 sk_SSL_CIPHER_free(sk); 2481 return NULL; 2482 } 2483 } 2484 } 2485 return sk; 2486} 2487 2488/** return a STACK of the ciphers available for the SSL and in order of 2489 * algorithm id */ 2490STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s) 2491{ 2492 if (s != NULL) { 2493 if (s->cipher_list_by_id != NULL) { 2494 return s->cipher_list_by_id; 2495 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) { 2496 return s->ctx->cipher_list_by_id; 2497 } 2498 } 2499 return NULL; 2500} 2501 2502/** The old interface to get the same thing as SSL_get_ciphers() */ 2503const char *SSL_get_cipher_list(const SSL *s, int n) 2504{ 2505 const SSL_CIPHER *c; 2506 STACK_OF(SSL_CIPHER) *sk; 2507 2508 if (s == NULL) 2509 return NULL; 2510 sk = SSL_get_ciphers(s); 2511 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 2512 return NULL; 2513 c = sk_SSL_CIPHER_value(sk, n); 2514 if (c == NULL) 2515 return NULL; 2516 return c->name; 2517} 2518 2519/** return a STACK of the ciphers available for the SSL_CTX and in order of 2520 * preference */ 2521STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx) 2522{ 2523 if (ctx != NULL) 2524 return ctx->cipher_list; 2525 return NULL; 2526} 2527 2528/* 2529 * Distinguish between ciphers controlled by set_ciphersuite() and 2530 * set_cipher_list() when counting. 2531 */ 2532static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk) 2533{ 2534 int i, num = 0; 2535 const SSL_CIPHER *c; 2536 2537 if (sk == NULL) 2538 return 0; 2539 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) { 2540 c = sk_SSL_CIPHER_value(sk, i); 2541 if (c->min_tls >= TLS1_3_VERSION) 2542 continue; 2543 num++; 2544 } 2545 return num; 2546} 2547 2548/** specify the ciphers to be used by default by the SSL_CTX */ 2549int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 2550{ 2551 STACK_OF(SSL_CIPHER) *sk; 2552 2553 sk = ssl_create_cipher_list(ctx->method, ctx->tls13_ciphersuites, 2554 &ctx->cipher_list, &ctx->cipher_list_by_id, str, 2555 ctx->cert); 2556 /* 2557 * ssl_create_cipher_list may return an empty stack if it was unable to 2558 * find a cipher matching the given rule string (for example if the rule 2559 * string specifies a cipher which has been disabled). This is not an 2560 * error as far as ssl_create_cipher_list is concerned, and hence 2561 * ctx->cipher_list and ctx->cipher_list_by_id has been updated. 2562 */ 2563 if (sk == NULL) 2564 return 0; 2565 else if (cipher_list_tls12_num(sk) == 0) { 2566 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 2567 return 0; 2568 } 2569 return 1; 2570} 2571 2572/** specify the ciphers to be used by the SSL */ 2573int SSL_set_cipher_list(SSL *s, const char *str) 2574{ 2575 STACK_OF(SSL_CIPHER) *sk; 2576 2577 sk = ssl_create_cipher_list(s->ctx->method, s->tls13_ciphersuites, 2578 &s->cipher_list, &s->cipher_list_by_id, str, 2579 s->cert); 2580 /* see comment in SSL_CTX_set_cipher_list */ 2581 if (sk == NULL) 2582 return 0; 2583 else if (cipher_list_tls12_num(sk) == 0) { 2584 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 2585 return 0; 2586 } 2587 return 1; 2588} 2589 2590char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size) 2591{ 2592 char *p; 2593 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk; 2594 const SSL_CIPHER *c; 2595 int i; 2596 2597 if (!s->server 2598 || s->peer_ciphers == NULL 2599 || size < 2) 2600 return NULL; 2601 2602 p = buf; 2603 clntsk = s->peer_ciphers; 2604 srvrsk = SSL_get_ciphers(s); 2605 if (clntsk == NULL || srvrsk == NULL) 2606 return NULL; 2607 2608 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0) 2609 return NULL; 2610 2611 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) { 2612 int n; 2613 2614 c = sk_SSL_CIPHER_value(clntsk, i); 2615 if (sk_SSL_CIPHER_find(srvrsk, c) < 0) 2616 continue; 2617 2618 n = strlen(c->name); 2619 if (n + 1 > size) { 2620 if (p != buf) 2621 --p; 2622 *p = '\0'; 2623 return buf; 2624 } 2625 strcpy(p, c->name); 2626 p += n; 2627 *(p++) = ':'; 2628 size -= n + 1; 2629 } 2630 p[-1] = '\0'; 2631 return buf; 2632} 2633 2634/** 2635 * Return the requested servername (SNI) value. Note that the behaviour varies 2636 * depending on: 2637 * - whether this is called by the client or the server, 2638 * - if we are before or during/after the handshake, 2639 * - if a resumption or normal handshake is being attempted/has occurred 2640 * - whether we have negotiated TLSv1.2 (or below) or TLSv1.3 2641 * 2642 * Note that only the host_name type is defined (RFC 3546). 2643 */ 2644const char *SSL_get_servername(const SSL *s, const int type) 2645{ 2646 /* 2647 * If we don't know if we are the client or the server yet then we assume 2648 * client. 2649 */ 2650 int server = s->handshake_func == NULL ? 0 : s->server; 2651 if (type != TLSEXT_NAMETYPE_host_name) 2652 return NULL; 2653 2654 if (server) { 2655 /** 2656 * Server side 2657 * In TLSv1.3 on the server SNI is not associated with the session 2658 * but in TLSv1.2 or below it is. 2659 * 2660 * Before the handshake: 2661 * - return NULL 2662 * 2663 * During/after the handshake (TLSv1.2 or below resumption occurred): 2664 * - If a servername was accepted by the server in the original 2665 * handshake then it will return that servername, or NULL otherwise. 2666 * 2667 * During/after the handshake (TLSv1.2 or below resumption did not occur): 2668 * - The function will return the servername requested by the client in 2669 * this handshake or NULL if none was requested. 2670 */ 2671 if (s->hit && !SSL_IS_TLS13(s)) 2672 return s->session->ext.hostname; 2673 } else { 2674 /** 2675 * Client side 2676 * 2677 * Before the handshake: 2678 * - If a servername has been set via a call to 2679 * SSL_set_tlsext_host_name() then it will return that servername 2680 * - If one has not been set, but a TLSv1.2 resumption is being 2681 * attempted and the session from the original handshake had a 2682 * servername accepted by the server then it will return that 2683 * servername 2684 * - Otherwise it returns NULL 2685 * 2686 * During/after the handshake (TLSv1.2 or below resumption occurred): 2687 * - If the session from the original handshake had a servername accepted 2688 * by the server then it will return that servername. 2689 * - Otherwise it returns the servername set via 2690 * SSL_set_tlsext_host_name() (or NULL if it was not called). 2691 * 2692 * During/after the handshake (TLSv1.2 or below resumption did not occur): 2693 * - It will return the servername set via SSL_set_tlsext_host_name() 2694 * (or NULL if it was not called). 2695 */ 2696 if (SSL_in_before(s)) { 2697 if (s->ext.hostname == NULL 2698 && s->session != NULL 2699 && s->session->ssl_version != TLS1_3_VERSION) 2700 return s->session->ext.hostname; 2701 } else { 2702 if (!SSL_IS_TLS13(s) && s->hit && s->session->ext.hostname != NULL) 2703 return s->session->ext.hostname; 2704 } 2705 } 2706 2707 return s->ext.hostname; 2708} 2709 2710int SSL_get_servername_type(const SSL *s) 2711{ 2712 if (SSL_get_servername(s, TLSEXT_NAMETYPE_host_name) != NULL) 2713 return TLSEXT_NAMETYPE_host_name; 2714 return -1; 2715} 2716 2717/* 2718 * SSL_select_next_proto implements the standard protocol selection. It is 2719 * expected that this function is called from the callback set by 2720 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a 2721 * vector of 8-bit, length prefixed byte strings. The length byte itself is 2722 * not included in the length. A byte string of length 0 is invalid. No byte 2723 * string may be truncated. The current, but experimental algorithm for 2724 * selecting the protocol is: 1) If the server doesn't support NPN then this 2725 * is indicated to the callback. In this case, the client application has to 2726 * abort the connection or have a default application level protocol. 2) If 2727 * the server supports NPN, but advertises an empty list then the client 2728 * selects the first protocol in its list, but indicates via the API that this 2729 * fallback case was enacted. 3) Otherwise, the client finds the first 2730 * protocol in the server's list that it supports and selects this protocol. 2731 * This is because it's assumed that the server has better information about 2732 * which protocol a client should use. 4) If the client doesn't support any 2733 * of the server's advertised protocols, then this is treated the same as 2734 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was 2735 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 2736 */ 2737int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 2738 const unsigned char *server, 2739 unsigned int server_len, 2740 const unsigned char *client, unsigned int client_len) 2741{ 2742 unsigned int i, j; 2743 const unsigned char *result; 2744 int status = OPENSSL_NPN_UNSUPPORTED; 2745 2746 /* 2747 * For each protocol in server preference order, see if we support it. 2748 */ 2749 for (i = 0; i < server_len;) { 2750 for (j = 0; j < client_len;) { 2751 if (server[i] == client[j] && 2752 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) { 2753 /* We found a match */ 2754 result = &server[i]; 2755 status = OPENSSL_NPN_NEGOTIATED; 2756 goto found; 2757 } 2758 j += client[j]; 2759 j++; 2760 } 2761 i += server[i]; 2762 i++; 2763 } 2764 2765 /* There's no overlap between our protocols and the server's list. */ 2766 result = client; 2767 status = OPENSSL_NPN_NO_OVERLAP; 2768 2769 found: 2770 *out = (unsigned char *)result + 1; 2771 *outlen = result[0]; 2772 return status; 2773} 2774 2775#ifndef OPENSSL_NO_NEXTPROTONEG 2776/* 2777 * SSL_get0_next_proto_negotiated sets *data and *len to point to the 2778 * client's requested protocol for this connection and returns 0. If the 2779 * client didn't request any protocol, then *data is set to NULL. Note that 2780 * the client can request any protocol it chooses. The value returned from 2781 * this function need not be a member of the list of supported protocols 2782 * provided by the callback. 2783 */ 2784void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 2785 unsigned *len) 2786{ 2787 *data = s->ext.npn; 2788 if (!*data) { 2789 *len = 0; 2790 } else { 2791 *len = (unsigned int)s->ext.npn_len; 2792 } 2793} 2794 2795/* 2796 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when 2797 * a TLS server needs a list of supported protocols for Next Protocol 2798 * Negotiation. The returned list must be in wire format. The list is 2799 * returned by setting |out| to point to it and |outlen| to its length. This 2800 * memory will not be modified, but one should assume that the SSL* keeps a 2801 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it 2802 * wishes to advertise. Otherwise, no such extension will be included in the 2803 * ServerHello. 2804 */ 2805void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx, 2806 SSL_CTX_npn_advertised_cb_func cb, 2807 void *arg) 2808{ 2809 ctx->ext.npn_advertised_cb = cb; 2810 ctx->ext.npn_advertised_cb_arg = arg; 2811} 2812 2813/* 2814 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 2815 * client needs to select a protocol from the server's provided list. |out| 2816 * must be set to point to the selected protocol (which may be within |in|). 2817 * The length of the protocol name must be written into |outlen|. The 2818 * server's advertised protocols are provided in |in| and |inlen|. The 2819 * callback can assume that |in| is syntactically valid. The client must 2820 * select a protocol. It is fatal to the connection if this callback returns 2821 * a value other than SSL_TLSEXT_ERR_OK. 2822 */ 2823void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx, 2824 SSL_CTX_npn_select_cb_func cb, 2825 void *arg) 2826{ 2827 ctx->ext.npn_select_cb = cb; 2828 ctx->ext.npn_select_cb_arg = arg; 2829} 2830#endif 2831 2832/* 2833 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|. 2834 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit 2835 * length-prefixed strings). Returns 0 on success. 2836 */ 2837int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 2838 unsigned int protos_len) 2839{ 2840 OPENSSL_free(ctx->ext.alpn); 2841 ctx->ext.alpn = OPENSSL_memdup(protos, protos_len); 2842 if (ctx->ext.alpn == NULL) { 2843 ctx->ext.alpn_len = 0; 2844 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE); 2845 return 1; 2846 } 2847 ctx->ext.alpn_len = protos_len; 2848 2849 return 0; 2850} 2851 2852/* 2853 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|. 2854 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit 2855 * length-prefixed strings). Returns 0 on success. 2856 */ 2857int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos, 2858 unsigned int protos_len) 2859{ 2860 OPENSSL_free(ssl->ext.alpn); 2861 ssl->ext.alpn = OPENSSL_memdup(protos, protos_len); 2862 if (ssl->ext.alpn == NULL) { 2863 ssl->ext.alpn_len = 0; 2864 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE); 2865 return 1; 2866 } 2867 ssl->ext.alpn_len = protos_len; 2868 2869 return 0; 2870} 2871 2872/* 2873 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is 2874 * called during ClientHello processing in order to select an ALPN protocol 2875 * from the client's list of offered protocols. 2876 */ 2877void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx, 2878 SSL_CTX_alpn_select_cb_func cb, 2879 void *arg) 2880{ 2881 ctx->ext.alpn_select_cb = cb; 2882 ctx->ext.alpn_select_cb_arg = arg; 2883} 2884 2885/* 2886 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|. 2887 * On return it sets |*data| to point to |*len| bytes of protocol name 2888 * (not including the leading length-prefix byte). If the server didn't 2889 * respond with a negotiated protocol then |*len| will be zero. 2890 */ 2891void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 2892 unsigned int *len) 2893{ 2894 *data = NULL; 2895 if (ssl->s3) 2896 *data = ssl->s3->alpn_selected; 2897 if (*data == NULL) 2898 *len = 0; 2899 else 2900 *len = (unsigned int)ssl->s3->alpn_selected_len; 2901} 2902 2903int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 2904 const char *label, size_t llen, 2905 const unsigned char *context, size_t contextlen, 2906 int use_context) 2907{ 2908 if (s->session == NULL 2909 || (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER)) 2910 return -1; 2911 2912 return s->method->ssl3_enc->export_keying_material(s, out, olen, label, 2913 llen, context, 2914 contextlen, use_context); 2915} 2916 2917int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen, 2918 const char *label, size_t llen, 2919 const unsigned char *context, 2920 size_t contextlen) 2921{ 2922 if (s->version != TLS1_3_VERSION) 2923 return 0; 2924 2925 return tls13_export_keying_material_early(s, out, olen, label, llen, 2926 context, contextlen); 2927} 2928 2929static unsigned long ssl_session_hash(const SSL_SESSION *a) 2930{ 2931 const unsigned char *session_id = a->session_id; 2932 unsigned long l; 2933 unsigned char tmp_storage[4]; 2934 2935 if (a->session_id_length < sizeof(tmp_storage)) { 2936 memset(tmp_storage, 0, sizeof(tmp_storage)); 2937 memcpy(tmp_storage, a->session_id, a->session_id_length); 2938 session_id = tmp_storage; 2939 } 2940 2941 l = (unsigned long) 2942 ((unsigned long)session_id[0]) | 2943 ((unsigned long)session_id[1] << 8L) | 2944 ((unsigned long)session_id[2] << 16L) | 2945 ((unsigned long)session_id[3] << 24L); 2946 return l; 2947} 2948 2949/* 2950 * NB: If this function (or indeed the hash function which uses a sort of 2951 * coarser function than this one) is changed, ensure 2952 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on 2953 * being able to construct an SSL_SESSION that will collide with any existing 2954 * session with a matching session ID. 2955 */ 2956static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 2957{ 2958 if (a->ssl_version != b->ssl_version) 2959 return 1; 2960 if (a->session_id_length != b->session_id_length) 2961 return 1; 2962 return memcmp(a->session_id, b->session_id, a->session_id_length); 2963} 2964 2965/* 2966 * These wrapper functions should remain rather than redeclaring 2967 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 2968 * variable. The reason is that the functions aren't static, they're exposed 2969 * via ssl.h. 2970 */ 2971 2972SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth) 2973{ 2974 SSL_CTX *ret = NULL; 2975 2976 if (meth == NULL) { 2977 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); 2978 return NULL; 2979 } 2980 2981 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) 2982 return NULL; 2983 2984 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 2985 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 2986 goto err; 2987 } 2988 ret = OPENSSL_zalloc(sizeof(*ret)); 2989 if (ret == NULL) 2990 goto err; 2991 2992 ret->method = meth; 2993 ret->min_proto_version = 0; 2994 ret->max_proto_version = 0; 2995 ret->mode = SSL_MODE_AUTO_RETRY; 2996 ret->session_cache_mode = SSL_SESS_CACHE_SERVER; 2997 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 2998 /* We take the system default. */ 2999 ret->session_timeout = meth->get_timeout(); 3000 ret->references = 1; 3001 ret->lock = CRYPTO_THREAD_lock_new(); 3002 if (ret->lock == NULL) { 3003 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 3004 OPENSSL_free(ret); 3005 return NULL; 3006 } 3007 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 3008 ret->verify_mode = SSL_VERIFY_NONE; 3009 if ((ret->cert = ssl_cert_new()) == NULL) 3010 goto err; 3011 3012 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp); 3013 if (ret->sessions == NULL) 3014 goto err; 3015 ret->cert_store = X509_STORE_new(); 3016 if (ret->cert_store == NULL) 3017 goto err; 3018#ifndef OPENSSL_NO_CT 3019 ret->ctlog_store = CTLOG_STORE_new(); 3020 if (ret->ctlog_store == NULL) 3021 goto err; 3022#endif 3023 3024 if (!SSL_CTX_set_ciphersuites(ret, TLS_DEFAULT_CIPHERSUITES)) 3025 goto err; 3026 3027 if (!ssl_create_cipher_list(ret->method, 3028 ret->tls13_ciphersuites, 3029 &ret->cipher_list, &ret->cipher_list_by_id, 3030 SSL_DEFAULT_CIPHER_LIST, ret->cert) 3031 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 3032 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 3033 goto err2; 3034 } 3035 3036 ret->param = X509_VERIFY_PARAM_new(); 3037 if (ret->param == NULL) 3038 goto err; 3039 3040 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 3041 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 3042 goto err2; 3043 } 3044 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 3045 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 3046 goto err2; 3047 } 3048 3049 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL) 3050 goto err; 3051 3052 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL) 3053 goto err; 3054 3055 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data)) 3056 goto err; 3057 3058 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL) 3059 goto err; 3060 3061 /* No compression for DTLS */ 3062 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)) 3063 ret->comp_methods = SSL_COMP_get_compression_methods(); 3064 3065 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 3066 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 3067 3068 /* Setup RFC5077 ticket keys */ 3069 if ((RAND_bytes(ret->ext.tick_key_name, 3070 sizeof(ret->ext.tick_key_name)) <= 0) 3071 || (RAND_priv_bytes(ret->ext.secure->tick_hmac_key, 3072 sizeof(ret->ext.secure->tick_hmac_key)) <= 0) 3073 || (RAND_priv_bytes(ret->ext.secure->tick_aes_key, 3074 sizeof(ret->ext.secure->tick_aes_key)) <= 0)) 3075 ret->options |= SSL_OP_NO_TICKET; 3076 3077 if (RAND_priv_bytes(ret->ext.cookie_hmac_key, 3078 sizeof(ret->ext.cookie_hmac_key)) <= 0) 3079 goto err; 3080 3081#ifndef OPENSSL_NO_SRP 3082 if (!SSL_CTX_SRP_CTX_init(ret)) 3083 goto err; 3084#endif 3085#ifndef OPENSSL_NO_ENGINE 3086# ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 3087# define eng_strx(x) #x 3088# define eng_str(x) eng_strx(x) 3089 /* Use specific client engine automatically... ignore errors */ 3090 { 3091 ENGINE *eng; 3092 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 3093 if (!eng) { 3094 ERR_clear_error(); 3095 ENGINE_load_builtin_engines(); 3096 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 3097 } 3098 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 3099 ERR_clear_error(); 3100 } 3101# endif 3102#endif 3103 /* 3104 * Default is to connect to non-RI servers. When RI is more widely 3105 * deployed might change this. 3106 */ 3107 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; 3108 /* 3109 * Disable compression by default to prevent CRIME. Applications can 3110 * re-enable compression by configuring 3111 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION); 3112 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3 3113 * middlebox compatibility by default. This may be disabled by default in 3114 * a later OpenSSL version. 3115 */ 3116 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT; 3117 3118 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing; 3119 3120 /* 3121 * We cannot usefully set a default max_early_data here (which gets 3122 * propagated in SSL_new(), for the following reason: setting the 3123 * SSL field causes tls_construct_stoc_early_data() to tell the 3124 * client that early data will be accepted when constructing a TLS 1.3 3125 * session ticket, and the client will accordingly send us early data 3126 * when using that ticket (if the client has early data to send). 3127 * However, in order for the early data to actually be consumed by 3128 * the application, the application must also have calls to 3129 * SSL_read_early_data(); otherwise we'll just skip past the early data 3130 * and ignore it. So, since the application must add calls to 3131 * SSL_read_early_data(), we also require them to add 3132 * calls to SSL_CTX_set_max_early_data() in order to use early data, 3133 * eliminating the bandwidth-wasting early data in the case described 3134 * above. 3135 */ 3136 ret->max_early_data = 0; 3137 3138 /* 3139 * Default recv_max_early_data is a fully loaded single record. Could be 3140 * split across multiple records in practice. We set this differently to 3141 * max_early_data so that, in the default case, we do not advertise any 3142 * support for early_data, but if a client were to send us some (e.g. 3143 * because of an old, stale ticket) then we will tolerate it and skip over 3144 * it. 3145 */ 3146 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH; 3147 3148 /* By default we send two session tickets automatically in TLSv1.3 */ 3149 ret->num_tickets = 2; 3150 3151 ssl_ctx_system_config(ret); 3152 3153 return ret; 3154 err: 3155 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 3156 err2: 3157 SSL_CTX_free(ret); 3158 return NULL; 3159} 3160 3161int SSL_CTX_up_ref(SSL_CTX *ctx) 3162{ 3163 int i; 3164 3165 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0) 3166 return 0; 3167 3168 REF_PRINT_COUNT("SSL_CTX", ctx); 3169 REF_ASSERT_ISNT(i < 2); 3170 return ((i > 1) ? 1 : 0); 3171} 3172 3173void SSL_CTX_free(SSL_CTX *a) 3174{ 3175 int i; 3176 3177 if (a == NULL) 3178 return; 3179 3180 CRYPTO_DOWN_REF(&a->references, &i, a->lock); 3181 REF_PRINT_COUNT("SSL_CTX", a); 3182 if (i > 0) 3183 return; 3184 REF_ASSERT_ISNT(i < 0); 3185 3186 X509_VERIFY_PARAM_free(a->param); 3187 dane_ctx_final(&a->dane); 3188 3189 /* 3190 * Free internal session cache. However: the remove_cb() may reference 3191 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 3192 * after the sessions were flushed. 3193 * As the ex_data handling routines might also touch the session cache, 3194 * the most secure solution seems to be: empty (flush) the cache, then 3195 * free ex_data, then finally free the cache. 3196 * (See ticket [openssl.org #212].) 3197 */ 3198 if (a->sessions != NULL) 3199 SSL_CTX_flush_sessions(a, 0); 3200 3201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); 3202 lh_SSL_SESSION_free(a->sessions); 3203 X509_STORE_free(a->cert_store); 3204#ifndef OPENSSL_NO_CT 3205 CTLOG_STORE_free(a->ctlog_store); 3206#endif 3207 sk_SSL_CIPHER_free(a->cipher_list); 3208 sk_SSL_CIPHER_free(a->cipher_list_by_id); 3209 sk_SSL_CIPHER_free(a->tls13_ciphersuites); 3210 ssl_cert_free(a->cert); 3211 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free); 3212 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free); 3213 sk_X509_pop_free(a->extra_certs, X509_free); 3214 a->comp_methods = NULL; 3215#ifndef OPENSSL_NO_SRTP 3216 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); 3217#endif 3218#ifndef OPENSSL_NO_SRP 3219 SSL_CTX_SRP_CTX_free(a); 3220#endif 3221#ifndef OPENSSL_NO_ENGINE 3222 ENGINE_finish(a->client_cert_engine); 3223#endif 3224 3225#ifndef OPENSSL_NO_EC 3226 OPENSSL_free(a->ext.ecpointformats); 3227 OPENSSL_free(a->ext.supportedgroups); 3228#endif 3229 OPENSSL_free(a->ext.alpn); 3230 OPENSSL_secure_free(a->ext.secure); 3231 3232 CRYPTO_THREAD_lock_free(a->lock); 3233 3234 OPENSSL_free(a); 3235} 3236 3237void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 3238{ 3239 ctx->default_passwd_callback = cb; 3240} 3241 3242void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 3243{ 3244 ctx->default_passwd_callback_userdata = u; 3245} 3246 3247pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx) 3248{ 3249 return ctx->default_passwd_callback; 3250} 3251 3252void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx) 3253{ 3254 return ctx->default_passwd_callback_userdata; 3255} 3256 3257void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb) 3258{ 3259 s->default_passwd_callback = cb; 3260} 3261 3262void SSL_set_default_passwd_cb_userdata(SSL *s, void *u) 3263{ 3264 s->default_passwd_callback_userdata = u; 3265} 3266 3267pem_password_cb *SSL_get_default_passwd_cb(SSL *s) 3268{ 3269 return s->default_passwd_callback; 3270} 3271 3272void *SSL_get_default_passwd_cb_userdata(SSL *s) 3273{ 3274 return s->default_passwd_callback_userdata; 3275} 3276 3277void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, 3278 int (*cb) (X509_STORE_CTX *, void *), 3279 void *arg) 3280{ 3281 ctx->app_verify_callback = cb; 3282 ctx->app_verify_arg = arg; 3283} 3284 3285void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, 3286 int (*cb) (int, X509_STORE_CTX *)) 3287{ 3288 ctx->verify_mode = mode; 3289 ctx->default_verify_callback = cb; 3290} 3291 3292void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 3293{ 3294 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 3295} 3296 3297void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg) 3298{ 3299 ssl_cert_set_cert_cb(c->cert, cb, arg); 3300} 3301 3302void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg) 3303{ 3304 ssl_cert_set_cert_cb(s->cert, cb, arg); 3305} 3306 3307void ssl_set_masks(SSL *s) 3308{ 3309 CERT *c = s->cert; 3310 uint32_t *pvalid = s->s3->tmp.valid_flags; 3311 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 3312 unsigned long mask_k, mask_a; 3313#ifndef OPENSSL_NO_EC 3314 int have_ecc_cert, ecdsa_ok; 3315#endif 3316 if (c == NULL) 3317 return; 3318 3319#ifndef OPENSSL_NO_DH 3320 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto); 3321#else 3322 dh_tmp = 0; 3323#endif 3324 3325 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID; 3326 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID; 3327 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID; 3328#ifndef OPENSSL_NO_EC 3329 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID; 3330#endif 3331 mask_k = 0; 3332 mask_a = 0; 3333 3334#ifdef CIPHER_DEBUG 3335 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n", 3336 dh_tmp, rsa_enc, rsa_sign, dsa_sign); 3337#endif 3338 3339#ifndef OPENSSL_NO_GOST 3340 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) { 3341 mask_k |= SSL_kGOST; 3342 mask_a |= SSL_aGOST12; 3343 } 3344 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) { 3345 mask_k |= SSL_kGOST; 3346 mask_a |= SSL_aGOST12; 3347 } 3348 if (ssl_has_cert(s, SSL_PKEY_GOST01)) { 3349 mask_k |= SSL_kGOST; 3350 mask_a |= SSL_aGOST01; 3351 } 3352#endif 3353 3354 if (rsa_enc) 3355 mask_k |= SSL_kRSA; 3356 3357 if (dh_tmp) 3358 mask_k |= SSL_kDHE; 3359 3360 /* 3361 * If we only have an RSA-PSS certificate allow RSA authentication 3362 * if TLS 1.2 and peer supports it. 3363 */ 3364 3365 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN) 3366 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN 3367 && TLS1_get_version(s) == TLS1_2_VERSION)) 3368 mask_a |= SSL_aRSA; 3369 3370 if (dsa_sign) { 3371 mask_a |= SSL_aDSS; 3372 } 3373 3374 mask_a |= SSL_aNULL; 3375 3376 /* 3377 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites 3378 * depending on the key usage extension. 3379 */ 3380#ifndef OPENSSL_NO_EC 3381 if (have_ecc_cert) { 3382 uint32_t ex_kusage; 3383 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509); 3384 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE; 3385 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN)) 3386 ecdsa_ok = 0; 3387 if (ecdsa_ok) 3388 mask_a |= SSL_aECDSA; 3389 } 3390 /* Allow Ed25519 for TLS 1.2 if peer supports it */ 3391 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519) 3392 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN 3393 && TLS1_get_version(s) == TLS1_2_VERSION) 3394 mask_a |= SSL_aECDSA; 3395 3396 /* Allow Ed448 for TLS 1.2 if peer supports it */ 3397 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448) 3398 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN 3399 && TLS1_get_version(s) == TLS1_2_VERSION) 3400 mask_a |= SSL_aECDSA; 3401#endif 3402 3403#ifndef OPENSSL_NO_EC 3404 mask_k |= SSL_kECDHE; 3405#endif 3406 3407#ifndef OPENSSL_NO_PSK 3408 mask_k |= SSL_kPSK; 3409 mask_a |= SSL_aPSK; 3410 if (mask_k & SSL_kRSA) 3411 mask_k |= SSL_kRSAPSK; 3412 if (mask_k & SSL_kDHE) 3413 mask_k |= SSL_kDHEPSK; 3414 if (mask_k & SSL_kECDHE) 3415 mask_k |= SSL_kECDHEPSK; 3416#endif 3417 3418 s->s3->tmp.mask_k = mask_k; 3419 s->s3->tmp.mask_a = mask_a; 3420} 3421 3422#ifndef OPENSSL_NO_EC 3423 3424int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 3425{ 3426 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) { 3427 /* key usage, if present, must allow signing */ 3428 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) { 3429 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 3430 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 3431 return 0; 3432 } 3433 } 3434 return 1; /* all checks are ok */ 3435} 3436 3437#endif 3438 3439int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo, 3440 size_t *serverinfo_length) 3441{ 3442 CERT_PKEY *cpk = s->s3->tmp.cert; 3443 *serverinfo_length = 0; 3444 3445 if (cpk == NULL || cpk->serverinfo == NULL) 3446 return 0; 3447 3448 *serverinfo = cpk->serverinfo; 3449 *serverinfo_length = cpk->serverinfo_length; 3450 return 1; 3451} 3452 3453void ssl_update_cache(SSL *s, int mode) 3454{ 3455 int i; 3456 3457 /* 3458 * If the session_id_length is 0, we are not supposed to cache it, and it 3459 * would be rather hard to do anyway :-) 3460 */ 3461 if (s->session->session_id_length == 0) 3462 return; 3463 3464 /* 3465 * If sid_ctx_length is 0 there is no specific application context 3466 * associated with this session, so when we try to resume it and 3467 * SSL_VERIFY_PEER is requested to verify the client identity, we have no 3468 * indication that this is actually a session for the proper application 3469 * context, and the *handshake* will fail, not just the resumption attempt. 3470 * Do not cache (on the server) these sessions that are not resumable 3471 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set). 3472 */ 3473 if (s->server && s->session->sid_ctx_length == 0 3474 && (s->verify_mode & SSL_VERIFY_PEER) != 0) 3475 return; 3476 3477 i = s->session_ctx->session_cache_mode; 3478 if ((i & mode) != 0 3479 && (!s->hit || SSL_IS_TLS13(s))) { 3480 /* 3481 * Add the session to the internal cache. In server side TLSv1.3 we 3482 * normally don't do this because by default it's a full stateless ticket 3483 * with only a dummy session id so there is no reason to cache it, 3484 * unless: 3485 * - we are doing early_data, in which case we cache so that we can 3486 * detect replays 3487 * - the application has set a remove_session_cb so needs to know about 3488 * session timeout events 3489 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket 3490 */ 3491 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0 3492 && (!SSL_IS_TLS13(s) 3493 || !s->server 3494 || (s->max_early_data > 0 3495 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0) 3496 || s->session_ctx->remove_session_cb != NULL 3497 || (s->options & SSL_OP_NO_TICKET) != 0)) 3498 SSL_CTX_add_session(s->session_ctx, s->session); 3499 3500 /* 3501 * Add the session to the external cache. We do this even in server side 3502 * TLSv1.3 without early data because some applications just want to 3503 * know about the creation of a session and aren't doing a full cache. 3504 */ 3505 if (s->session_ctx->new_session_cb != NULL) { 3506 SSL_SESSION_up_ref(s->session); 3507 if (!s->session_ctx->new_session_cb(s, s->session)) 3508 SSL_SESSION_free(s->session); 3509 } 3510 } 3511 3512 /* auto flush every 255 connections */ 3513 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) { 3514 TSAN_QUALIFIER int *stat; 3515 if (mode & SSL_SESS_CACHE_CLIENT) 3516 stat = &s->session_ctx->stats.sess_connect_good; 3517 else 3518 stat = &s->session_ctx->stats.sess_accept_good; 3519 if ((tsan_load(stat) & 0xff) == 0xff) 3520 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL)); 3521 } 3522} 3523 3524const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx) 3525{ 3526 return ctx->method; 3527} 3528 3529const SSL_METHOD *SSL_get_ssl_method(const SSL *s) 3530{ 3531 return s->method; 3532} 3533 3534int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 3535{ 3536 int ret = 1; 3537 3538 if (s->method != meth) { 3539 const SSL_METHOD *sm = s->method; 3540 int (*hf) (SSL *) = s->handshake_func; 3541 3542 if (sm->version == meth->version) 3543 s->method = meth; 3544 else { 3545 sm->ssl_free(s); 3546 s->method = meth; 3547 ret = s->method->ssl_new(s); 3548 } 3549 3550 if (hf == sm->ssl_connect) 3551 s->handshake_func = meth->ssl_connect; 3552 else if (hf == sm->ssl_accept) 3553 s->handshake_func = meth->ssl_accept; 3554 } 3555 return ret; 3556} 3557 3558int SSL_get_error(const SSL *s, int i) 3559{ 3560 int reason; 3561 unsigned long l; 3562 BIO *bio; 3563 3564 if (i > 0) 3565 return SSL_ERROR_NONE; 3566 3567 /* 3568 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc, 3569 * where we do encode the error 3570 */ 3571 if ((l = ERR_peek_error()) != 0) { 3572 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 3573 return SSL_ERROR_SYSCALL; 3574 else 3575 return SSL_ERROR_SSL; 3576 } 3577 3578 if (SSL_want_read(s)) { 3579 bio = SSL_get_rbio(s); 3580 if (BIO_should_read(bio)) 3581 return SSL_ERROR_WANT_READ; 3582 else if (BIO_should_write(bio)) 3583 /* 3584 * This one doesn't make too much sense ... We never try to write 3585 * to the rbio, and an application program where rbio and wbio 3586 * are separate couldn't even know what it should wait for. 3587 * However if we ever set s->rwstate incorrectly (so that we have 3588 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and 3589 * wbio *are* the same, this test works around that bug; so it 3590 * might be safer to keep it. 3591 */ 3592 return SSL_ERROR_WANT_WRITE; 3593 else if (BIO_should_io_special(bio)) { 3594 reason = BIO_get_retry_reason(bio); 3595 if (reason == BIO_RR_CONNECT) 3596 return SSL_ERROR_WANT_CONNECT; 3597 else if (reason == BIO_RR_ACCEPT) 3598 return SSL_ERROR_WANT_ACCEPT; 3599 else 3600 return SSL_ERROR_SYSCALL; /* unknown */ 3601 } 3602 } 3603 3604 if (SSL_want_write(s)) { 3605 /* Access wbio directly - in order to use the buffered bio if present */ 3606 bio = s->wbio; 3607 if (BIO_should_write(bio)) 3608 return SSL_ERROR_WANT_WRITE; 3609 else if (BIO_should_read(bio)) 3610 /* 3611 * See above (SSL_want_read(s) with BIO_should_write(bio)) 3612 */ 3613 return SSL_ERROR_WANT_READ; 3614 else if (BIO_should_io_special(bio)) { 3615 reason = BIO_get_retry_reason(bio); 3616 if (reason == BIO_RR_CONNECT) 3617 return SSL_ERROR_WANT_CONNECT; 3618 else if (reason == BIO_RR_ACCEPT) 3619 return SSL_ERROR_WANT_ACCEPT; 3620 else 3621 return SSL_ERROR_SYSCALL; 3622 } 3623 } 3624 if (SSL_want_x509_lookup(s)) 3625 return SSL_ERROR_WANT_X509_LOOKUP; 3626 if (SSL_want_async(s)) 3627 return SSL_ERROR_WANT_ASYNC; 3628 if (SSL_want_async_job(s)) 3629 return SSL_ERROR_WANT_ASYNC_JOB; 3630 if (SSL_want_client_hello_cb(s)) 3631 return SSL_ERROR_WANT_CLIENT_HELLO_CB; 3632 3633 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && 3634 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) 3635 return SSL_ERROR_ZERO_RETURN; 3636 3637 return SSL_ERROR_SYSCALL; 3638} 3639 3640static int ssl_do_handshake_intern(void *vargs) 3641{ 3642 struct ssl_async_args *args; 3643 SSL *s; 3644 3645 args = (struct ssl_async_args *)vargs; 3646 s = args->s; 3647 3648 return s->handshake_func(s); 3649} 3650 3651int SSL_do_handshake(SSL *s) 3652{ 3653 int ret = 1; 3654 3655 if (s->handshake_func == NULL) { 3656 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 3657 return -1; 3658 } 3659 3660 ossl_statem_check_finish_init(s, -1); 3661 3662 s->method->ssl_renegotiate_check(s, 0); 3663 3664 if (SSL_in_init(s) || SSL_in_before(s)) { 3665 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 3666 struct ssl_async_args args; 3667 3668 args.s = s; 3669 3670 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern); 3671 } else { 3672 ret = s->handshake_func(s); 3673 } 3674 } 3675 return ret; 3676} 3677 3678void SSL_set_accept_state(SSL *s) 3679{ 3680 s->server = 1; 3681 s->shutdown = 0; 3682 ossl_statem_clear(s); 3683 s->handshake_func = s->method->ssl_accept; 3684 clear_ciphers(s); 3685} 3686 3687void SSL_set_connect_state(SSL *s) 3688{ 3689 s->server = 0; 3690 s->shutdown = 0; 3691 ossl_statem_clear(s); 3692 s->handshake_func = s->method->ssl_connect; 3693 clear_ciphers(s); 3694} 3695 3696int ssl_undefined_function(SSL *s) 3697{ 3698 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 3699 return 0; 3700} 3701 3702int ssl_undefined_void_function(void) 3703{ 3704 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 3705 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 3706 return 0; 3707} 3708 3709int ssl_undefined_const_function(const SSL *s) 3710{ 3711 return 0; 3712} 3713 3714const SSL_METHOD *ssl_bad_method(int ver) 3715{ 3716 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 3717 return NULL; 3718} 3719 3720const char *ssl_protocol_to_string(int version) 3721{ 3722 switch(version) 3723 { 3724 case TLS1_3_VERSION: 3725 return "TLSv1.3"; 3726 3727 case TLS1_2_VERSION: 3728 return "TLSv1.2"; 3729 3730 case TLS1_1_VERSION: 3731 return "TLSv1.1"; 3732 3733 case TLS1_VERSION: 3734 return "TLSv1"; 3735 3736 case SSL3_VERSION: 3737 return "SSLv3"; 3738 3739 case DTLS1_BAD_VER: 3740 return "DTLSv0.9"; 3741 3742 case DTLS1_VERSION: 3743 return "DTLSv1"; 3744 3745 case DTLS1_2_VERSION: 3746 return "DTLSv1.2"; 3747 3748 default: 3749 return "unknown"; 3750 } 3751} 3752 3753const char *SSL_get_version(const SSL *s) 3754{ 3755 return ssl_protocol_to_string(s->version); 3756} 3757 3758static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src) 3759{ 3760 STACK_OF(X509_NAME) *sk; 3761 X509_NAME *xn; 3762 int i; 3763 3764 if (src == NULL) { 3765 *dst = NULL; 3766 return 1; 3767 } 3768 3769 if ((sk = sk_X509_NAME_new_null()) == NULL) 3770 return 0; 3771 for (i = 0; i < sk_X509_NAME_num(src); i++) { 3772 xn = X509_NAME_dup(sk_X509_NAME_value(src, i)); 3773 if (xn == NULL) { 3774 sk_X509_NAME_pop_free(sk, X509_NAME_free); 3775 return 0; 3776 } 3777 if (sk_X509_NAME_insert(sk, xn, i) == 0) { 3778 X509_NAME_free(xn); 3779 sk_X509_NAME_pop_free(sk, X509_NAME_free); 3780 return 0; 3781 } 3782 } 3783 *dst = sk; 3784 3785 return 1; 3786} 3787 3788SSL *SSL_dup(SSL *s) 3789{ 3790 SSL *ret; 3791 int i; 3792 3793 /* If we're not quiescent, just up_ref! */ 3794 if (!SSL_in_init(s) || !SSL_in_before(s)) { 3795 CRYPTO_UP_REF(&s->references, &i, s->lock); 3796 return s; 3797 } 3798 3799 /* 3800 * Otherwise, copy configuration state, and session if set. 3801 */ 3802 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 3803 return NULL; 3804 3805 if (s->session != NULL) { 3806 /* 3807 * Arranges to share the same session via up_ref. This "copies" 3808 * session-id, SSL_METHOD, sid_ctx, and 'cert' 3809 */ 3810 if (!SSL_copy_session_id(ret, s)) 3811 goto err; 3812 } else { 3813 /* 3814 * No session has been established yet, so we have to expect that 3815 * s->cert or ret->cert will be changed later -- they should not both 3816 * point to the same object, and thus we can't use 3817 * SSL_copy_session_id. 3818 */ 3819 if (!SSL_set_ssl_method(ret, s->method)) 3820 goto err; 3821 3822 if (s->cert != NULL) { 3823 ssl_cert_free(ret->cert); 3824 ret->cert = ssl_cert_dup(s->cert); 3825 if (ret->cert == NULL) 3826 goto err; 3827 } 3828 3829 if (!SSL_set_session_id_context(ret, s->sid_ctx, 3830 (int)s->sid_ctx_length)) 3831 goto err; 3832 } 3833 3834 if (!ssl_dane_dup(ret, s)) 3835 goto err; 3836 ret->version = s->version; 3837 ret->options = s->options; 3838 ret->min_proto_version = s->min_proto_version; 3839 ret->max_proto_version = s->max_proto_version; 3840 ret->mode = s->mode; 3841 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 3842 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 3843 ret->msg_callback = s->msg_callback; 3844 ret->msg_callback_arg = s->msg_callback_arg; 3845 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s)); 3846 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 3847 ret->generate_session_id = s->generate_session_id; 3848 3849 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 3850 3851 /* copy app data, a little dangerous perhaps */ 3852 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data)) 3853 goto err; 3854 3855 ret->server = s->server; 3856 if (s->handshake_func) { 3857 if (s->server) 3858 SSL_set_accept_state(ret); 3859 else 3860 SSL_set_connect_state(ret); 3861 } 3862 ret->shutdown = s->shutdown; 3863 ret->hit = s->hit; 3864 3865 ret->default_passwd_callback = s->default_passwd_callback; 3866 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata; 3867 3868 X509_VERIFY_PARAM_inherit(ret->param, s->param); 3869 3870 /* dup the cipher_list and cipher_list_by_id stacks */ 3871 if (s->cipher_list != NULL) { 3872 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 3873 goto err; 3874 } 3875 if (s->cipher_list_by_id != NULL) 3876 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id)) 3877 == NULL) 3878 goto err; 3879 3880 /* Dup the client_CA list */ 3881 if (!dup_ca_names(&ret->ca_names, s->ca_names) 3882 || !dup_ca_names(&ret->client_ca_names, s->client_ca_names)) 3883 goto err; 3884 3885 return ret; 3886 3887 err: 3888 SSL_free(ret); 3889 return NULL; 3890} 3891 3892void ssl_clear_cipher_ctx(SSL *s) 3893{ 3894 if (s->enc_read_ctx != NULL) { 3895 EVP_CIPHER_CTX_free(s->enc_read_ctx); 3896 s->enc_read_ctx = NULL; 3897 } 3898 if (s->enc_write_ctx != NULL) { 3899 EVP_CIPHER_CTX_free(s->enc_write_ctx); 3900 s->enc_write_ctx = NULL; 3901 } 3902#ifndef OPENSSL_NO_COMP 3903 COMP_CTX_free(s->expand); 3904 s->expand = NULL; 3905 COMP_CTX_free(s->compress); 3906 s->compress = NULL; 3907#endif 3908} 3909 3910X509 *SSL_get_certificate(const SSL *s) 3911{ 3912 if (s->cert != NULL) 3913 return s->cert->key->x509; 3914 else 3915 return NULL; 3916} 3917 3918EVP_PKEY *SSL_get_privatekey(const SSL *s) 3919{ 3920 if (s->cert != NULL) 3921 return s->cert->key->privatekey; 3922 else 3923 return NULL; 3924} 3925 3926X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) 3927{ 3928 if (ctx->cert != NULL) 3929 return ctx->cert->key->x509; 3930 else 3931 return NULL; 3932} 3933 3934EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx) 3935{ 3936 if (ctx->cert != NULL) 3937 return ctx->cert->key->privatekey; 3938 else 3939 return NULL; 3940} 3941 3942const SSL_CIPHER *SSL_get_current_cipher(const SSL *s) 3943{ 3944 if ((s->session != NULL) && (s->session->cipher != NULL)) 3945 return s->session->cipher; 3946 return NULL; 3947} 3948 3949const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s) 3950{ 3951 return s->s3->tmp.new_cipher; 3952} 3953 3954const COMP_METHOD *SSL_get_current_compression(const SSL *s) 3955{ 3956#ifndef OPENSSL_NO_COMP 3957 return s->compress ? COMP_CTX_get_method(s->compress) : NULL; 3958#else 3959 return NULL; 3960#endif 3961} 3962 3963const COMP_METHOD *SSL_get_current_expansion(const SSL *s) 3964{ 3965#ifndef OPENSSL_NO_COMP 3966 return s->expand ? COMP_CTX_get_method(s->expand) : NULL; 3967#else 3968 return NULL; 3969#endif 3970} 3971 3972int ssl_init_wbio_buffer(SSL *s) 3973{ 3974 BIO *bbio; 3975 3976 if (s->bbio != NULL) { 3977 /* Already buffered. */ 3978 return 1; 3979 } 3980 3981 bbio = BIO_new(BIO_f_buffer()); 3982 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) { 3983 BIO_free(bbio); 3984 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 3985 return 0; 3986 } 3987 s->bbio = bbio; 3988 s->wbio = BIO_push(bbio, s->wbio); 3989 3990 return 1; 3991} 3992 3993int ssl_free_wbio_buffer(SSL *s) 3994{ 3995 /* callers ensure s is never null */ 3996 if (s->bbio == NULL) 3997 return 1; 3998 3999 s->wbio = BIO_pop(s->wbio); 4000 BIO_free(s->bbio); 4001 s->bbio = NULL; 4002 4003 return 1; 4004} 4005 4006void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 4007{ 4008 ctx->quiet_shutdown = mode; 4009} 4010 4011int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 4012{ 4013 return ctx->quiet_shutdown; 4014} 4015 4016void SSL_set_quiet_shutdown(SSL *s, int mode) 4017{ 4018 s->quiet_shutdown = mode; 4019} 4020 4021int SSL_get_quiet_shutdown(const SSL *s) 4022{ 4023 return s->quiet_shutdown; 4024} 4025 4026void SSL_set_shutdown(SSL *s, int mode) 4027{ 4028 s->shutdown = mode; 4029} 4030 4031int SSL_get_shutdown(const SSL *s) 4032{ 4033 return s->shutdown; 4034} 4035 4036int SSL_version(const SSL *s) 4037{ 4038 return s->version; 4039} 4040 4041int SSL_client_version(const SSL *s) 4042{ 4043 return s->client_version; 4044} 4045 4046SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl) 4047{ 4048 return ssl->ctx; 4049} 4050 4051SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx) 4052{ 4053 CERT *new_cert; 4054 if (ssl->ctx == ctx) 4055 return ssl->ctx; 4056 if (ctx == NULL) 4057 ctx = ssl->session_ctx; 4058 new_cert = ssl_cert_dup(ctx->cert); 4059 if (new_cert == NULL) { 4060 return NULL; 4061 } 4062 4063 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) { 4064 ssl_cert_free(new_cert); 4065 return NULL; 4066 } 4067 4068 ssl_cert_free(ssl->cert); 4069 ssl->cert = new_cert; 4070 4071 /* 4072 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH), 4073 * so setter APIs must prevent invalid lengths from entering the system. 4074 */ 4075 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx))) 4076 return NULL; 4077 4078 /* 4079 * If the session ID context matches that of the parent SSL_CTX, 4080 * inherit it from the new SSL_CTX as well. If however the context does 4081 * not match (i.e., it was set per-ssl with SSL_set_session_id_context), 4082 * leave it unchanged. 4083 */ 4084 if ((ssl->ctx != NULL) && 4085 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) && 4086 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) { 4087 ssl->sid_ctx_length = ctx->sid_ctx_length; 4088 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx)); 4089 } 4090 4091 SSL_CTX_up_ref(ctx); 4092 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 4093 ssl->ctx = ctx; 4094 4095 return ssl->ctx; 4096} 4097 4098int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 4099{ 4100 return X509_STORE_set_default_paths(ctx->cert_store); 4101} 4102 4103int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx) 4104{ 4105 X509_LOOKUP *lookup; 4106 4107 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir()); 4108 if (lookup == NULL) 4109 return 0; 4110 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT); 4111 4112 /* Clear any errors if the default directory does not exist */ 4113 ERR_clear_error(); 4114 4115 return 1; 4116} 4117 4118int SSL_CTX_set_default_verify_file(SSL_CTX *ctx) 4119{ 4120 X509_LOOKUP *lookup; 4121 4122 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file()); 4123 if (lookup == NULL) 4124 return 0; 4125 4126 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT); 4127 4128 /* Clear any errors if the default file does not exist */ 4129 ERR_clear_error(); 4130 4131 return 1; 4132} 4133 4134int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 4135 const char *CApath) 4136{ 4137 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath); 4138} 4139 4140void SSL_set_info_callback(SSL *ssl, 4141 void (*cb) (const SSL *ssl, int type, int val)) 4142{ 4143 ssl->info_callback = cb; 4144} 4145 4146/* 4147 * One compiler (Diab DCC) doesn't like argument names in returned function 4148 * pointer. 4149 */ 4150void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ , 4151 int /* type */ , 4152 int /* val */ ) { 4153 return ssl->info_callback; 4154} 4155 4156void SSL_set_verify_result(SSL *ssl, long arg) 4157{ 4158 ssl->verify_result = arg; 4159} 4160 4161long SSL_get_verify_result(const SSL *ssl) 4162{ 4163 return ssl->verify_result; 4164} 4165 4166size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen) 4167{ 4168 if (outlen == 0) 4169 return sizeof(ssl->s3->client_random); 4170 if (outlen > sizeof(ssl->s3->client_random)) 4171 outlen = sizeof(ssl->s3->client_random); 4172 memcpy(out, ssl->s3->client_random, outlen); 4173 return outlen; 4174} 4175 4176size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen) 4177{ 4178 if (outlen == 0) 4179 return sizeof(ssl->s3->server_random); 4180 if (outlen > sizeof(ssl->s3->server_random)) 4181 outlen = sizeof(ssl->s3->server_random); 4182 memcpy(out, ssl->s3->server_random, outlen); 4183 return outlen; 4184} 4185 4186size_t SSL_SESSION_get_master_key(const SSL_SESSION *session, 4187 unsigned char *out, size_t outlen) 4188{ 4189 if (outlen == 0) 4190 return session->master_key_length; 4191 if (outlen > session->master_key_length) 4192 outlen = session->master_key_length; 4193 memcpy(out, session->master_key, outlen); 4194 return outlen; 4195} 4196 4197int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in, 4198 size_t len) 4199{ 4200 if (len > sizeof(sess->master_key)) 4201 return 0; 4202 4203 memcpy(sess->master_key, in, len); 4204 sess->master_key_length = len; 4205 return 1; 4206} 4207 4208 4209int SSL_set_ex_data(SSL *s, int idx, void *arg) 4210{ 4211 return CRYPTO_set_ex_data(&s->ex_data, idx, arg); 4212} 4213 4214void *SSL_get_ex_data(const SSL *s, int idx) 4215{ 4216 return CRYPTO_get_ex_data(&s->ex_data, idx); 4217} 4218 4219int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 4220{ 4221 return CRYPTO_set_ex_data(&s->ex_data, idx, arg); 4222} 4223 4224void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 4225{ 4226 return CRYPTO_get_ex_data(&s->ex_data, idx); 4227} 4228 4229X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) 4230{ 4231 return ctx->cert_store; 4232} 4233 4234void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 4235{ 4236 X509_STORE_free(ctx->cert_store); 4237 ctx->cert_store = store; 4238} 4239 4240void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store) 4241{ 4242 if (store != NULL) 4243 X509_STORE_up_ref(store); 4244 SSL_CTX_set_cert_store(ctx, store); 4245} 4246 4247int SSL_want(const SSL *s) 4248{ 4249 return s->rwstate; 4250} 4251 4252/** 4253 * \brief Set the callback for generating temporary DH keys. 4254 * \param ctx the SSL context. 4255 * \param dh the callback 4256 */ 4257 4258#ifndef OPENSSL_NO_DH 4259void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, 4260 DH *(*dh) (SSL *ssl, int is_export, 4261 int keylength)) 4262{ 4263 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); 4264} 4265 4266void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export, 4267 int keylength)) 4268{ 4269 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); 4270} 4271#endif 4272 4273#ifndef OPENSSL_NO_PSK 4274int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint) 4275{ 4276 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { 4277 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); 4278 return 0; 4279 } 4280 OPENSSL_free(ctx->cert->psk_identity_hint); 4281 if (identity_hint != NULL) { 4282 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint); 4283 if (ctx->cert->psk_identity_hint == NULL) 4284 return 0; 4285 } else 4286 ctx->cert->psk_identity_hint = NULL; 4287 return 1; 4288} 4289 4290int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint) 4291{ 4292 if (s == NULL) 4293 return 0; 4294 4295 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { 4296 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); 4297 return 0; 4298 } 4299 OPENSSL_free(s->cert->psk_identity_hint); 4300 if (identity_hint != NULL) { 4301 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint); 4302 if (s->cert->psk_identity_hint == NULL) 4303 return 0; 4304 } else 4305 s->cert->psk_identity_hint = NULL; 4306 return 1; 4307} 4308 4309const char *SSL_get_psk_identity_hint(const SSL *s) 4310{ 4311 if (s == NULL || s->session == NULL) 4312 return NULL; 4313 return s->session->psk_identity_hint; 4314} 4315 4316const char *SSL_get_psk_identity(const SSL *s) 4317{ 4318 if (s == NULL || s->session == NULL) 4319 return NULL; 4320 return s->session->psk_identity; 4321} 4322 4323void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb) 4324{ 4325 s->psk_client_callback = cb; 4326} 4327 4328void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb) 4329{ 4330 ctx->psk_client_callback = cb; 4331} 4332 4333void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb) 4334{ 4335 s->psk_server_callback = cb; 4336} 4337 4338void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb) 4339{ 4340 ctx->psk_server_callback = cb; 4341} 4342#endif 4343 4344void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb) 4345{ 4346 s->psk_find_session_cb = cb; 4347} 4348 4349void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx, 4350 SSL_psk_find_session_cb_func cb) 4351{ 4352 ctx->psk_find_session_cb = cb; 4353} 4354 4355void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb) 4356{ 4357 s->psk_use_session_cb = cb; 4358} 4359 4360void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx, 4361 SSL_psk_use_session_cb_func cb) 4362{ 4363 ctx->psk_use_session_cb = cb; 4364} 4365 4366void SSL_CTX_set_msg_callback(SSL_CTX *ctx, 4367 void (*cb) (int write_p, int version, 4368 int content_type, const void *buf, 4369 size_t len, SSL *ssl, void *arg)) 4370{ 4371 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 4372} 4373 4374void SSL_set_msg_callback(SSL *ssl, 4375 void (*cb) (int write_p, int version, 4376 int content_type, const void *buf, 4377 size_t len, SSL *ssl, void *arg)) 4378{ 4379 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 4380} 4381 4382void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, 4383 int (*cb) (SSL *ssl, 4384 int 4385 is_forward_secure)) 4386{ 4387 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB, 4388 (void (*)(void))cb); 4389} 4390 4391void SSL_set_not_resumable_session_callback(SSL *ssl, 4392 int (*cb) (SSL *ssl, 4393 int is_forward_secure)) 4394{ 4395 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB, 4396 (void (*)(void))cb); 4397} 4398 4399void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx, 4400 size_t (*cb) (SSL *ssl, int type, 4401 size_t len, void *arg)) 4402{ 4403 ctx->record_padding_cb = cb; 4404} 4405 4406void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg) 4407{ 4408 ctx->record_padding_arg = arg; 4409} 4410 4411void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx) 4412{ 4413 return ctx->record_padding_arg; 4414} 4415 4416int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size) 4417{ 4418 /* block size of 0 or 1 is basically no padding */ 4419 if (block_size == 1) 4420 ctx->block_padding = 0; 4421 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH) 4422 ctx->block_padding = block_size; 4423 else 4424 return 0; 4425 return 1; 4426} 4427 4428void SSL_set_record_padding_callback(SSL *ssl, 4429 size_t (*cb) (SSL *ssl, int type, 4430 size_t len, void *arg)) 4431{ 4432 ssl->record_padding_cb = cb; 4433} 4434 4435void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg) 4436{ 4437 ssl->record_padding_arg = arg; 4438} 4439 4440void *SSL_get_record_padding_callback_arg(const SSL *ssl) 4441{ 4442 return ssl->record_padding_arg; 4443} 4444 4445int SSL_set_block_padding(SSL *ssl, size_t block_size) 4446{ 4447 /* block size of 0 or 1 is basically no padding */ 4448 if (block_size == 1) 4449 ssl->block_padding = 0; 4450 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH) 4451 ssl->block_padding = block_size; 4452 else 4453 return 0; 4454 return 1; 4455} 4456 4457int SSL_set_num_tickets(SSL *s, size_t num_tickets) 4458{ 4459 s->num_tickets = num_tickets; 4460 4461 return 1; 4462} 4463 4464size_t SSL_get_num_tickets(const SSL *s) 4465{ 4466 return s->num_tickets; 4467} 4468 4469int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets) 4470{ 4471 ctx->num_tickets = num_tickets; 4472 4473 return 1; 4474} 4475 4476size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx) 4477{ 4478 return ctx->num_tickets; 4479} 4480 4481/* 4482 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer 4483 * variable, freeing EVP_MD_CTX previously stored in that variable, if any. 4484 * If EVP_MD pointer is passed, initializes ctx with this |md|. 4485 * Returns the newly allocated ctx; 4486 */ 4487 4488EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) 4489{ 4490 ssl_clear_hash_ctx(hash); 4491 *hash = EVP_MD_CTX_new(); 4492 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) { 4493 EVP_MD_CTX_free(*hash); 4494 *hash = NULL; 4495 return NULL; 4496 } 4497 return *hash; 4498} 4499 4500void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 4501{ 4502 4503 EVP_MD_CTX_free(*hash); 4504 *hash = NULL; 4505} 4506 4507/* Retrieve handshake hashes */ 4508int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen, 4509 size_t *hashlen) 4510{ 4511 EVP_MD_CTX *ctx = NULL; 4512 EVP_MD_CTX *hdgst = s->s3->handshake_dgst; 4513 int hashleni = EVP_MD_CTX_size(hdgst); 4514 int ret = 0; 4515 4516 if (hashleni < 0 || (size_t)hashleni > outlen) { 4517 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH, 4518 ERR_R_INTERNAL_ERROR); 4519 goto err; 4520 } 4521 4522 ctx = EVP_MD_CTX_new(); 4523 if (ctx == NULL) 4524 goto err; 4525 4526 if (!EVP_MD_CTX_copy_ex(ctx, hdgst) 4527 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) { 4528 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH, 4529 ERR_R_INTERNAL_ERROR); 4530 goto err; 4531 } 4532 4533 *hashlen = hashleni; 4534 4535 ret = 1; 4536 err: 4537 EVP_MD_CTX_free(ctx); 4538 return ret; 4539} 4540 4541int SSL_session_reused(const SSL *s) 4542{ 4543 return s->hit; 4544} 4545 4546int SSL_is_server(const SSL *s) 4547{ 4548 return s->server; 4549} 4550 4551#if OPENSSL_API_COMPAT < 0x10100000L 4552void SSL_set_debug(SSL *s, int debug) 4553{ 4554 /* Old function was do-nothing anyway... */ 4555 (void)s; 4556 (void)debug; 4557} 4558#endif 4559 4560void SSL_set_security_level(SSL *s, int level) 4561{ 4562 s->cert->sec_level = level; 4563} 4564 4565int SSL_get_security_level(const SSL *s) 4566{ 4567 return s->cert->sec_level; 4568} 4569 4570void SSL_set_security_callback(SSL *s, 4571 int (*cb) (const SSL *s, const SSL_CTX *ctx, 4572 int op, int bits, int nid, 4573 void *other, void *ex)) 4574{ 4575 s->cert->sec_cb = cb; 4576} 4577 4578int (*SSL_get_security_callback(const SSL *s)) (const SSL *s, 4579 const SSL_CTX *ctx, int op, 4580 int bits, int nid, void *other, 4581 void *ex) { 4582 return s->cert->sec_cb; 4583} 4584 4585void SSL_set0_security_ex_data(SSL *s, void *ex) 4586{ 4587 s->cert->sec_ex = ex; 4588} 4589 4590void *SSL_get0_security_ex_data(const SSL *s) 4591{ 4592 return s->cert->sec_ex; 4593} 4594 4595void SSL_CTX_set_security_level(SSL_CTX *ctx, int level) 4596{ 4597 ctx->cert->sec_level = level; 4598} 4599 4600int SSL_CTX_get_security_level(const SSL_CTX *ctx) 4601{ 4602 return ctx->cert->sec_level; 4603} 4604 4605void SSL_CTX_set_security_callback(SSL_CTX *ctx, 4606 int (*cb) (const SSL *s, const SSL_CTX *ctx, 4607 int op, int bits, int nid, 4608 void *other, void *ex)) 4609{ 4610 ctx->cert->sec_cb = cb; 4611} 4612 4613int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s, 4614 const SSL_CTX *ctx, 4615 int op, int bits, 4616 int nid, 4617 void *other, 4618 void *ex) { 4619 return ctx->cert->sec_cb; 4620} 4621 4622void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex) 4623{ 4624 ctx->cert->sec_ex = ex; 4625} 4626 4627void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx) 4628{ 4629 return ctx->cert->sec_ex; 4630} 4631 4632/* 4633 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that 4634 * can return unsigned long, instead of the generic long return value from the 4635 * control interface. 4636 */ 4637unsigned long SSL_CTX_get_options(const SSL_CTX *ctx) 4638{ 4639 return ctx->options; 4640} 4641 4642unsigned long SSL_get_options(const SSL *s) 4643{ 4644 return s->options; 4645} 4646 4647unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op) 4648{ 4649 return ctx->options |= op; 4650} 4651 4652unsigned long SSL_set_options(SSL *s, unsigned long op) 4653{ 4654 return s->options |= op; 4655} 4656 4657unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op) 4658{ 4659 return ctx->options &= ~op; 4660} 4661 4662unsigned long SSL_clear_options(SSL *s, unsigned long op) 4663{ 4664 return s->options &= ~op; 4665} 4666 4667STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s) 4668{ 4669 return s->verified_chain; 4670} 4671 4672IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); 4673 4674#ifndef OPENSSL_NO_CT 4675 4676/* 4677 * Moves SCTs from the |src| stack to the |dst| stack. 4678 * The source of each SCT will be set to |origin|. 4679 * If |dst| points to a NULL pointer, a new stack will be created and owned by 4680 * the caller. 4681 * Returns the number of SCTs moved, or a negative integer if an error occurs. 4682 */ 4683static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src, 4684 sct_source_t origin) 4685{ 4686 int scts_moved = 0; 4687 SCT *sct = NULL; 4688 4689 if (*dst == NULL) { 4690 *dst = sk_SCT_new_null(); 4691 if (*dst == NULL) { 4692 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE); 4693 goto err; 4694 } 4695 } 4696 4697 while ((sct = sk_SCT_pop(src)) != NULL) { 4698 if (SCT_set_source(sct, origin) != 1) 4699 goto err; 4700 4701 if (sk_SCT_push(*dst, sct) <= 0) 4702 goto err; 4703 scts_moved += 1; 4704 } 4705 4706 return scts_moved; 4707 err: 4708 if (sct != NULL) 4709 sk_SCT_push(src, sct); /* Put the SCT back */ 4710 return -1; 4711} 4712 4713/* 4714 * Look for data collected during ServerHello and parse if found. 4715 * Returns the number of SCTs extracted. 4716 */ 4717static int ct_extract_tls_extension_scts(SSL *s) 4718{ 4719 int scts_extracted = 0; 4720 4721 if (s->ext.scts != NULL) { 4722 const unsigned char *p = s->ext.scts; 4723 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len); 4724 4725 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION); 4726 4727 SCT_LIST_free(scts); 4728 } 4729 4730 return scts_extracted; 4731} 4732 4733/* 4734 * Checks for an OCSP response and then attempts to extract any SCTs found if it 4735 * contains an SCT X509 extension. They will be stored in |s->scts|. 4736 * Returns: 4737 * - The number of SCTs extracted, assuming an OCSP response exists. 4738 * - 0 if no OCSP response exists or it contains no SCTs. 4739 * - A negative integer if an error occurs. 4740 */ 4741static int ct_extract_ocsp_response_scts(SSL *s) 4742{ 4743# ifndef OPENSSL_NO_OCSP 4744 int scts_extracted = 0; 4745 const unsigned char *p; 4746 OCSP_BASICRESP *br = NULL; 4747 OCSP_RESPONSE *rsp = NULL; 4748 STACK_OF(SCT) *scts = NULL; 4749 int i; 4750 4751 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0) 4752 goto err; 4753 4754 p = s->ext.ocsp.resp; 4755 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len); 4756 if (rsp == NULL) 4757 goto err; 4758 4759 br = OCSP_response_get1_basic(rsp); 4760 if (br == NULL) 4761 goto err; 4762 4763 for (i = 0; i < OCSP_resp_count(br); ++i) { 4764 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i); 4765 4766 if (single == NULL) 4767 continue; 4768 4769 scts = 4770 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL); 4771 scts_extracted = 4772 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE); 4773 if (scts_extracted < 0) 4774 goto err; 4775 } 4776 err: 4777 SCT_LIST_free(scts); 4778 OCSP_BASICRESP_free(br); 4779 OCSP_RESPONSE_free(rsp); 4780 return scts_extracted; 4781# else 4782 /* Behave as if no OCSP response exists */ 4783 return 0; 4784# endif 4785} 4786 4787/* 4788 * Attempts to extract SCTs from the peer certificate. 4789 * Return the number of SCTs extracted, or a negative integer if an error 4790 * occurs. 4791 */ 4792static int ct_extract_x509v3_extension_scts(SSL *s) 4793{ 4794 int scts_extracted = 0; 4795 X509 *cert = s->session != NULL ? s->session->peer : NULL; 4796 4797 if (cert != NULL) { 4798 STACK_OF(SCT) *scts = 4799 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL); 4800 4801 scts_extracted = 4802 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION); 4803 4804 SCT_LIST_free(scts); 4805 } 4806 4807 return scts_extracted; 4808} 4809 4810/* 4811 * Attempts to find all received SCTs by checking TLS extensions, the OCSP 4812 * response (if it exists) and X509v3 extensions in the certificate. 4813 * Returns NULL if an error occurs. 4814 */ 4815const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s) 4816{ 4817 if (!s->scts_parsed) { 4818 if (ct_extract_tls_extension_scts(s) < 0 || 4819 ct_extract_ocsp_response_scts(s) < 0 || 4820 ct_extract_x509v3_extension_scts(s) < 0) 4821 goto err; 4822 4823 s->scts_parsed = 1; 4824 } 4825 return s->scts; 4826 err: 4827 return NULL; 4828} 4829 4830static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx, 4831 const STACK_OF(SCT) *scts, void *unused_arg) 4832{ 4833 return 1; 4834} 4835 4836static int ct_strict(const CT_POLICY_EVAL_CTX * ctx, 4837 const STACK_OF(SCT) *scts, void *unused_arg) 4838{ 4839 int count = scts != NULL ? sk_SCT_num(scts) : 0; 4840 int i; 4841 4842 for (i = 0; i < count; ++i) { 4843 SCT *sct = sk_SCT_value(scts, i); 4844 int status = SCT_get_validation_status(sct); 4845 4846 if (status == SCT_VALIDATION_STATUS_VALID) 4847 return 1; 4848 } 4849 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS); 4850 return 0; 4851} 4852 4853int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback, 4854 void *arg) 4855{ 4856 /* 4857 * Since code exists that uses the custom extension handler for CT, look 4858 * for this and throw an error if they have already registered to use CT. 4859 */ 4860 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx, 4861 TLSEXT_TYPE_signed_certificate_timestamp)) 4862 { 4863 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK, 4864 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED); 4865 return 0; 4866 } 4867 4868 if (callback != NULL) { 4869 /* 4870 * If we are validating CT, then we MUST accept SCTs served via OCSP 4871 */ 4872 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp)) 4873 return 0; 4874 } 4875 4876 s->ct_validation_callback = callback; 4877 s->ct_validation_callback_arg = arg; 4878 4879 return 1; 4880} 4881 4882int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx, 4883 ssl_ct_validation_cb callback, void *arg) 4884{ 4885 /* 4886 * Since code exists that uses the custom extension handler for CT, look for 4887 * this and throw an error if they have already registered to use CT. 4888 */ 4889 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx, 4890 TLSEXT_TYPE_signed_certificate_timestamp)) 4891 { 4892 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK, 4893 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED); 4894 return 0; 4895 } 4896 4897 ctx->ct_validation_callback = callback; 4898 ctx->ct_validation_callback_arg = arg; 4899 return 1; 4900} 4901 4902int SSL_ct_is_enabled(const SSL *s) 4903{ 4904 return s->ct_validation_callback != NULL; 4905} 4906 4907int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx) 4908{ 4909 return ctx->ct_validation_callback != NULL; 4910} 4911 4912int ssl_validate_ct(SSL *s) 4913{ 4914 int ret = 0; 4915 X509 *cert = s->session != NULL ? s->session->peer : NULL; 4916 X509 *issuer; 4917 SSL_DANE *dane = &s->dane; 4918 CT_POLICY_EVAL_CTX *ctx = NULL; 4919 const STACK_OF(SCT) *scts; 4920 4921 /* 4922 * If no callback is set, the peer is anonymous, or its chain is invalid, 4923 * skip SCT validation - just return success. Applications that continue 4924 * handshakes without certificates, with unverified chains, or pinned leaf 4925 * certificates are outside the scope of the WebPKI and CT. 4926 * 4927 * The above exclusions notwithstanding the vast majority of peers will 4928 * have rather ordinary certificate chains validated by typical 4929 * applications that perform certificate verification and therefore will 4930 * process SCTs when enabled. 4931 */ 4932 if (s->ct_validation_callback == NULL || cert == NULL || 4933 s->verify_result != X509_V_OK || 4934 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1) 4935 return 1; 4936 4937 /* 4938 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3) 4939 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2 4940 */ 4941 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) { 4942 switch (dane->mtlsa->usage) { 4943 case DANETLS_USAGE_DANE_TA: 4944 case DANETLS_USAGE_DANE_EE: 4945 return 1; 4946 } 4947 } 4948 4949 ctx = CT_POLICY_EVAL_CTX_new(); 4950 if (ctx == NULL) { 4951 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT, 4952 ERR_R_MALLOC_FAILURE); 4953 goto end; 4954 } 4955 4956 issuer = sk_X509_value(s->verified_chain, 1); 4957 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert); 4958 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer); 4959 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store); 4960 CT_POLICY_EVAL_CTX_set_time( 4961 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000); 4962 4963 scts = SSL_get0_peer_scts(s); 4964 4965 /* 4966 * This function returns success (> 0) only when all the SCTs are valid, 0 4967 * when some are invalid, and < 0 on various internal errors (out of 4968 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient 4969 * reason to abort the handshake, that decision is up to the callback. 4970 * Therefore, we error out only in the unexpected case that the return 4971 * value is negative. 4972 * 4973 * XXX: One might well argue that the return value of this function is an 4974 * unfortunate design choice. Its job is only to determine the validation 4975 * status of each of the provided SCTs. So long as it correctly separates 4976 * the wheat from the chaff it should return success. Failure in this case 4977 * ought to correspond to an inability to carry out its duties. 4978 */ 4979 if (SCT_LIST_validate(scts, ctx) < 0) { 4980 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT, 4981 SSL_R_SCT_VERIFICATION_FAILED); 4982 goto end; 4983 } 4984 4985 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg); 4986 if (ret < 0) 4987 ret = 0; /* This function returns 0 on failure */ 4988 if (!ret) 4989 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT, 4990 SSL_R_CALLBACK_FAILED); 4991 4992 end: 4993 CT_POLICY_EVAL_CTX_free(ctx); 4994 /* 4995 * With SSL_VERIFY_NONE the session may be cached and re-used despite a 4996 * failure return code here. Also the application may wish the complete 4997 * the handshake, and then disconnect cleanly at a higher layer, after 4998 * checking the verification status of the completed connection. 4999 * 5000 * We therefore force a certificate verification failure which will be 5001 * visible via SSL_get_verify_result() and cached as part of any resumed 5002 * session. 5003 * 5004 * Note: the permissive callback is for information gathering only, always 5005 * returns success, and does not affect verification status. Only the 5006 * strict callback or a custom application-specified callback can trigger 5007 * connection failure or record a verification error. 5008 */ 5009 if (ret <= 0) 5010 s->verify_result = X509_V_ERR_NO_VALID_SCTS; 5011 return ret; 5012} 5013 5014int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode) 5015{ 5016 switch (validation_mode) { 5017 default: 5018 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE); 5019 return 0; 5020 case SSL_CT_VALIDATION_PERMISSIVE: 5021 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL); 5022 case SSL_CT_VALIDATION_STRICT: 5023 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL); 5024 } 5025} 5026 5027int SSL_enable_ct(SSL *s, int validation_mode) 5028{ 5029 switch (validation_mode) { 5030 default: 5031 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE); 5032 return 0; 5033 case SSL_CT_VALIDATION_PERMISSIVE: 5034 return SSL_set_ct_validation_callback(s, ct_permissive, NULL); 5035 case SSL_CT_VALIDATION_STRICT: 5036 return SSL_set_ct_validation_callback(s, ct_strict, NULL); 5037 } 5038} 5039 5040int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx) 5041{ 5042 return CTLOG_STORE_load_default_file(ctx->ctlog_store); 5043} 5044 5045int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path) 5046{ 5047 return CTLOG_STORE_load_file(ctx->ctlog_store, path); 5048} 5049 5050void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs) 5051{ 5052 CTLOG_STORE_free(ctx->ctlog_store); 5053 ctx->ctlog_store = logs; 5054} 5055 5056const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx) 5057{ 5058 return ctx->ctlog_store; 5059} 5060 5061#endif /* OPENSSL_NO_CT */ 5062 5063void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb, 5064 void *arg) 5065{ 5066 c->client_hello_cb = cb; 5067 c->client_hello_cb_arg = arg; 5068} 5069 5070int SSL_client_hello_isv2(SSL *s) 5071{ 5072 if (s->clienthello == NULL) 5073 return 0; 5074 return s->clienthello->isv2; 5075} 5076 5077unsigned int SSL_client_hello_get0_legacy_version(SSL *s) 5078{ 5079 if (s->clienthello == NULL) 5080 return 0; 5081 return s->clienthello->legacy_version; 5082} 5083 5084size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out) 5085{ 5086 if (s->clienthello == NULL) 5087 return 0; 5088 if (out != NULL) 5089 *out = s->clienthello->random; 5090 return SSL3_RANDOM_SIZE; 5091} 5092 5093size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out) 5094{ 5095 if (s->clienthello == NULL) 5096 return 0; 5097 if (out != NULL) 5098 *out = s->clienthello->session_id; 5099 return s->clienthello->session_id_len; 5100} 5101 5102size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out) 5103{ 5104 if (s->clienthello == NULL) 5105 return 0; 5106 if (out != NULL) 5107 *out = PACKET_data(&s->clienthello->ciphersuites); 5108 return PACKET_remaining(&s->clienthello->ciphersuites); 5109} 5110 5111size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out) 5112{ 5113 if (s->clienthello == NULL) 5114 return 0; 5115 if (out != NULL) 5116 *out = s->clienthello->compressions; 5117 return s->clienthello->compressions_len; 5118} 5119 5120int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen) 5121{ 5122 RAW_EXTENSION *ext; 5123 int *present; 5124 size_t num = 0, i; 5125 5126 if (s->clienthello == NULL || out == NULL || outlen == NULL) 5127 return 0; 5128 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) { 5129 ext = s->clienthello->pre_proc_exts + i; 5130 if (ext->present) 5131 num++; 5132 } 5133 if (num == 0) { 5134 *out = NULL; 5135 *outlen = 0; 5136 return 1; 5137 } 5138 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) { 5139 SSLerr(SSL_F_SSL_CLIENT_HELLO_GET1_EXTENSIONS_PRESENT, 5140 ERR_R_MALLOC_FAILURE); 5141 return 0; 5142 } 5143 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) { 5144 ext = s->clienthello->pre_proc_exts + i; 5145 if (ext->present) { 5146 if (ext->received_order >= num) 5147 goto err; 5148 present[ext->received_order] = ext->type; 5149 } 5150 } 5151 *out = present; 5152 *outlen = num; 5153 return 1; 5154 err: 5155 OPENSSL_free(present); 5156 return 0; 5157} 5158 5159int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out, 5160 size_t *outlen) 5161{ 5162 size_t i; 5163 RAW_EXTENSION *r; 5164 5165 if (s->clienthello == NULL) 5166 return 0; 5167 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) { 5168 r = s->clienthello->pre_proc_exts + i; 5169 if (r->present && r->type == type) { 5170 if (out != NULL) 5171 *out = PACKET_data(&r->data); 5172 if (outlen != NULL) 5173 *outlen = PACKET_remaining(&r->data); 5174 return 1; 5175 } 5176 } 5177 return 0; 5178} 5179 5180int SSL_free_buffers(SSL *ssl) 5181{ 5182 RECORD_LAYER *rl = &ssl->rlayer; 5183 5184 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl)) 5185 return 0; 5186 5187 RECORD_LAYER_release(rl); 5188 return 1; 5189} 5190 5191int SSL_alloc_buffers(SSL *ssl) 5192{ 5193 return ssl3_setup_buffers(ssl); 5194} 5195 5196void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb) 5197{ 5198 ctx->keylog_callback = cb; 5199} 5200 5201SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx) 5202{ 5203 return ctx->keylog_callback; 5204} 5205 5206static int nss_keylog_int(const char *prefix, 5207 SSL *ssl, 5208 const uint8_t *parameter_1, 5209 size_t parameter_1_len, 5210 const uint8_t *parameter_2, 5211 size_t parameter_2_len) 5212{ 5213 char *out = NULL; 5214 char *cursor = NULL; 5215 size_t out_len = 0; 5216 size_t i; 5217 size_t prefix_len; 5218 5219 if (ssl->ctx->keylog_callback == NULL) 5220 return 1; 5221 5222 /* 5223 * Our output buffer will contain the following strings, rendered with 5224 * space characters in between, terminated by a NULL character: first the 5225 * prefix, then the first parameter, then the second parameter. The 5226 * meaning of each parameter depends on the specific key material being 5227 * logged. Note that the first and second parameters are encoded in 5228 * hexadecimal, so we need a buffer that is twice their lengths. 5229 */ 5230 prefix_len = strlen(prefix); 5231 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3; 5232 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) { 5233 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT, 5234 ERR_R_MALLOC_FAILURE); 5235 return 0; 5236 } 5237 5238 strcpy(cursor, prefix); 5239 cursor += prefix_len; 5240 *cursor++ = ' '; 5241 5242 for (i = 0; i < parameter_1_len; i++) { 5243 sprintf(cursor, "%02x", parameter_1[i]); 5244 cursor += 2; 5245 } 5246 *cursor++ = ' '; 5247 5248 for (i = 0; i < parameter_2_len; i++) { 5249 sprintf(cursor, "%02x", parameter_2[i]); 5250 cursor += 2; 5251 } 5252 *cursor = '\0'; 5253 5254 ssl->ctx->keylog_callback(ssl, (const char *)out); 5255 OPENSSL_clear_free(out, out_len); 5256 return 1; 5257 5258} 5259 5260int ssl_log_rsa_client_key_exchange(SSL *ssl, 5261 const uint8_t *encrypted_premaster, 5262 size_t encrypted_premaster_len, 5263 const uint8_t *premaster, 5264 size_t premaster_len) 5265{ 5266 if (encrypted_premaster_len < 8) { 5267 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, 5268 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 5269 return 0; 5270 } 5271 5272 /* We only want the first 8 bytes of the encrypted premaster as a tag. */ 5273 return nss_keylog_int("RSA", 5274 ssl, 5275 encrypted_premaster, 5276 8, 5277 premaster, 5278 premaster_len); 5279} 5280 5281int ssl_log_secret(SSL *ssl, 5282 const char *label, 5283 const uint8_t *secret, 5284 size_t secret_len) 5285{ 5286 return nss_keylog_int(label, 5287 ssl, 5288 ssl->s3->client_random, 5289 SSL3_RANDOM_SIZE, 5290 secret, 5291 secret_len); 5292} 5293 5294#define SSLV2_CIPHER_LEN 3 5295 5296int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format) 5297{ 5298 int n; 5299 5300 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN; 5301 5302 if (PACKET_remaining(cipher_suites) == 0) { 5303 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST, 5304 SSL_R_NO_CIPHERS_SPECIFIED); 5305 return 0; 5306 } 5307 5308 if (PACKET_remaining(cipher_suites) % n != 0) { 5309 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5310 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 5311 return 0; 5312 } 5313 5314 OPENSSL_free(s->s3->tmp.ciphers_raw); 5315 s->s3->tmp.ciphers_raw = NULL; 5316 s->s3->tmp.ciphers_rawlen = 0; 5317 5318 if (sslv2format) { 5319 size_t numciphers = PACKET_remaining(cipher_suites) / n; 5320 PACKET sslv2ciphers = *cipher_suites; 5321 unsigned int leadbyte; 5322 unsigned char *raw; 5323 5324 /* 5325 * We store the raw ciphers list in SSLv3+ format so we need to do some 5326 * preprocessing to convert the list first. If there are any SSLv2 only 5327 * ciphersuites with a non-zero leading byte then we are going to 5328 * slightly over allocate because we won't store those. But that isn't a 5329 * problem. 5330 */ 5331 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN); 5332 s->s3->tmp.ciphers_raw = raw; 5333 if (raw == NULL) { 5334 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5335 ERR_R_MALLOC_FAILURE); 5336 return 0; 5337 } 5338 for (s->s3->tmp.ciphers_rawlen = 0; 5339 PACKET_remaining(&sslv2ciphers) > 0; 5340 raw += TLS_CIPHER_LEN) { 5341 if (!PACKET_get_1(&sslv2ciphers, &leadbyte) 5342 || (leadbyte == 0 5343 && !PACKET_copy_bytes(&sslv2ciphers, raw, 5344 TLS_CIPHER_LEN)) 5345 || (leadbyte != 0 5346 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) { 5347 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5348 SSL_R_BAD_PACKET); 5349 OPENSSL_free(s->s3->tmp.ciphers_raw); 5350 s->s3->tmp.ciphers_raw = NULL; 5351 s->s3->tmp.ciphers_rawlen = 0; 5352 return 0; 5353 } 5354 if (leadbyte == 0) 5355 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN; 5356 } 5357 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw, 5358 &s->s3->tmp.ciphers_rawlen)) { 5359 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5360 ERR_R_INTERNAL_ERROR); 5361 return 0; 5362 } 5363 return 1; 5364} 5365 5366int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len, 5367 int isv2format, STACK_OF(SSL_CIPHER) **sk, 5368 STACK_OF(SSL_CIPHER) **scsvs) 5369{ 5370 PACKET pkt; 5371 5372 if (!PACKET_buf_init(&pkt, bytes, len)) 5373 return 0; 5374 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0); 5375} 5376 5377int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites, 5378 STACK_OF(SSL_CIPHER) **skp, 5379 STACK_OF(SSL_CIPHER) **scsvs_out, 5380 int sslv2format, int fatal) 5381{ 5382 const SSL_CIPHER *c; 5383 STACK_OF(SSL_CIPHER) *sk = NULL; 5384 STACK_OF(SSL_CIPHER) *scsvs = NULL; 5385 int n; 5386 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */ 5387 unsigned char cipher[SSLV2_CIPHER_LEN]; 5388 5389 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN; 5390 5391 if (PACKET_remaining(cipher_suites) == 0) { 5392 if (fatal) 5393 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST, 5394 SSL_R_NO_CIPHERS_SPECIFIED); 5395 else 5396 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED); 5397 return 0; 5398 } 5399 5400 if (PACKET_remaining(cipher_suites) % n != 0) { 5401 if (fatal) 5402 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST, 5403 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 5404 else 5405 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, 5406 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 5407 return 0; 5408 } 5409 5410 sk = sk_SSL_CIPHER_new_null(); 5411 scsvs = sk_SSL_CIPHER_new_null(); 5412 if (sk == NULL || scsvs == NULL) { 5413 if (fatal) 5414 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST, 5415 ERR_R_MALLOC_FAILURE); 5416 else 5417 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 5418 goto err; 5419 } 5420 5421 while (PACKET_copy_bytes(cipher_suites, cipher, n)) { 5422 /* 5423 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the 5424 * first byte set to zero, while true SSLv2 ciphers have a non-zero 5425 * first byte. We don't support any true SSLv2 ciphers, so skip them. 5426 */ 5427 if (sslv2format && cipher[0] != '\0') 5428 continue; 5429 5430 /* For SSLv2-compat, ignore leading 0-byte. */ 5431 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1); 5432 if (c != NULL) { 5433 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) || 5434 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) { 5435 if (fatal) 5436 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 5437 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 5438 else 5439 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 5440 goto err; 5441 } 5442 } 5443 } 5444 if (PACKET_remaining(cipher_suites) > 0) { 5445 if (fatal) 5446 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST, 5447 SSL_R_BAD_LENGTH); 5448 else 5449 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH); 5450 goto err; 5451 } 5452 5453 if (skp != NULL) 5454 *skp = sk; 5455 else 5456 sk_SSL_CIPHER_free(sk); 5457 if (scsvs_out != NULL) 5458 *scsvs_out = scsvs; 5459 else 5460 sk_SSL_CIPHER_free(scsvs); 5461 return 1; 5462 err: 5463 sk_SSL_CIPHER_free(sk); 5464 sk_SSL_CIPHER_free(scsvs); 5465 return 0; 5466} 5467 5468int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data) 5469{ 5470 ctx->max_early_data = max_early_data; 5471 5472 return 1; 5473} 5474 5475uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx) 5476{ 5477 return ctx->max_early_data; 5478} 5479 5480int SSL_set_max_early_data(SSL *s, uint32_t max_early_data) 5481{ 5482 s->max_early_data = max_early_data; 5483 5484 return 1; 5485} 5486 5487uint32_t SSL_get_max_early_data(const SSL *s) 5488{ 5489 return s->max_early_data; 5490} 5491 5492int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data) 5493{ 5494 ctx->recv_max_early_data = recv_max_early_data; 5495 5496 return 1; 5497} 5498 5499uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx) 5500{ 5501 return ctx->recv_max_early_data; 5502} 5503 5504int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data) 5505{ 5506 s->recv_max_early_data = recv_max_early_data; 5507 5508 return 1; 5509} 5510 5511uint32_t SSL_get_recv_max_early_data(const SSL *s) 5512{ 5513 return s->recv_max_early_data; 5514} 5515 5516__owur unsigned int ssl_get_max_send_fragment(const SSL *ssl) 5517{ 5518 /* Return any active Max Fragment Len extension */ 5519 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)) 5520 return GET_MAX_FRAGMENT_LENGTH(ssl->session); 5521 5522 /* return current SSL connection setting */ 5523 return ssl->max_send_fragment; 5524} 5525 5526__owur unsigned int ssl_get_split_send_fragment(const SSL *ssl) 5527{ 5528 /* Return a value regarding an active Max Fragment Len extension */ 5529 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session) 5530 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session)) 5531 return GET_MAX_FRAGMENT_LENGTH(ssl->session); 5532 5533 /* else limit |split_send_fragment| to current |max_send_fragment| */ 5534 if (ssl->split_send_fragment > ssl->max_send_fragment) 5535 return ssl->max_send_fragment; 5536 5537 /* return current SSL connection setting */ 5538 return ssl->split_send_fragment; 5539} 5540 5541int SSL_stateless(SSL *s) 5542{ 5543 int ret; 5544 5545 /* Ensure there is no state left over from a previous invocation */ 5546 if (!SSL_clear(s)) 5547 return 0; 5548 5549 ERR_clear_error(); 5550 5551 s->s3->flags |= TLS1_FLAGS_STATELESS; 5552 ret = SSL_accept(s); 5553 s->s3->flags &= ~TLS1_FLAGS_STATELESS; 5554 5555 if (ret > 0 && s->ext.cookieok) 5556 return 1; 5557 5558 if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s)) 5559 return 0; 5560 5561 return -1; 5562} 5563 5564void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val) 5565{ 5566 ctx->pha_enabled = val; 5567} 5568 5569void SSL_set_post_handshake_auth(SSL *ssl, int val) 5570{ 5571 ssl->pha_enabled = val; 5572} 5573 5574int SSL_verify_client_post_handshake(SSL *ssl) 5575{ 5576 if (!SSL_IS_TLS13(ssl)) { 5577 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION); 5578 return 0; 5579 } 5580 if (!ssl->server) { 5581 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER); 5582 return 0; 5583 } 5584 5585 if (!SSL_is_init_finished(ssl)) { 5586 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT); 5587 return 0; 5588 } 5589 5590 switch (ssl->post_handshake_auth) { 5591 case SSL_PHA_NONE: 5592 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED); 5593 return 0; 5594 default: 5595 case SSL_PHA_EXT_SENT: 5596 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR); 5597 return 0; 5598 case SSL_PHA_EXT_RECEIVED: 5599 break; 5600 case SSL_PHA_REQUEST_PENDING: 5601 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING); 5602 return 0; 5603 case SSL_PHA_REQUESTED: 5604 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT); 5605 return 0; 5606 } 5607 5608 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING; 5609 5610 /* checks verify_mode and algorithm_auth */ 5611 if (!send_certificate_request(ssl)) { 5612 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */ 5613 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG); 5614 return 0; 5615 } 5616 5617 ossl_statem_set_in_init(ssl, 1); 5618 return 1; 5619} 5620 5621int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx, 5622 SSL_CTX_generate_session_ticket_fn gen_cb, 5623 SSL_CTX_decrypt_session_ticket_fn dec_cb, 5624 void *arg) 5625{ 5626 ctx->generate_ticket_cb = gen_cb; 5627 ctx->decrypt_ticket_cb = dec_cb; 5628 ctx->ticket_cb_data = arg; 5629 return 1; 5630} 5631 5632void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx, 5633 SSL_allow_early_data_cb_fn cb, 5634 void *arg) 5635{ 5636 ctx->allow_early_data_cb = cb; 5637 ctx->allow_early_data_cb_data = arg; 5638} 5639 5640void SSL_set_allow_early_data_cb(SSL *s, 5641 SSL_allow_early_data_cb_fn cb, 5642 void *arg) 5643{ 5644 s->allow_early_data_cb = cb; 5645 s->allow_early_data_cb_data = arg; 5646} 5647