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 26 const char SSL_version_str[] = OPENSSL_VERSION_TEXT; 27 28 static 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 36 static 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 45 static 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 55 static int ssl_undefined_function_4(SSL *ssl, int r) 56 { 57 (void)r; 58 return ssl_undefined_function(ssl); 59 } 60 61 static 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 70 static int ssl_undefined_function_6(int r) 71 { 72 (void)r; 73 return ssl_undefined_function(NULL); 74 } 75 76 static 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 90 SSL3_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 }; 104 105 struct 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 }; 116 117 static 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 }; 132 133 static 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 } 171 172 static 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 } 181 182 static 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 } 190 191 static 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 */ 209 static 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 } 237 238 static 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 } 282 283 static 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 } 289 290 static 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 */ 463 static 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 } 568 569 static 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 } 576 577 int 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 */ 656 int 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 } 677 678 SSL *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 } 860 861 int SSL_is_dtls(const SSL *s) 862 { 863 return SSL_IS_DTLS(s) ? 1 : 0; 864 } 865 866 int 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 } 877 878 int 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 } 891 892 int 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 } 905 906 int 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 } 913 914 int 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 } 921 922 int 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 } 946 947 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) 948 { 949 return X509_VERIFY_PARAM_set_purpose(s->param, purpose); 950 } 951 952 int SSL_set_purpose(SSL *s, int purpose) 953 { 954 return X509_VERIFY_PARAM_set_purpose(s->param, purpose); 955 } 956 957 int SSL_CTX_set_trust(SSL_CTX *s, int trust) 958 { 959 return X509_VERIFY_PARAM_set_trust(s->param, trust); 960 } 961 962 int SSL_set_trust(SSL *s, int trust) 963 { 964 return X509_VERIFY_PARAM_set_trust(s->param, trust); 965 } 966 967 int SSL_set1_host(SSL *s, const char *hostname) 968 { 969 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0); 970 } 971 972 int SSL_add1_host(SSL *s, const char *hostname) 973 { 974 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0); 975 } 976 977 void SSL_set_hostflags(SSL *s, unsigned int flags) 978 { 979 X509_VERIFY_PARAM_set_hostflags(s->param, flags); 980 } 981 982 const char *SSL_get0_peername(SSL *s) 983 { 984 return X509_VERIFY_PARAM_get0_peername(s->param); 985 } 986 987 int SSL_CTX_dane_enable(SSL_CTX *ctx) 988 { 989 return dane_ctx_enable(&ctx->dane); 990 } 991 992 unsigned 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 1000 unsigned 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 1008 int 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 1051 unsigned 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 1059 unsigned 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 1067 int 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 1082 int 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 1104 SSL_DANE *SSL_get0_dane(SSL *s) 1105 { 1106 return &s->dane; 1107 } 1108 1109 int 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 1115 int 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 1121 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) 1122 { 1123 return X509_VERIFY_PARAM_set1(ctx->param, vpm); 1124 } 1125 1126 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) 1127 { 1128 return X509_VERIFY_PARAM_set1(ssl->param, vpm); 1129 } 1130 1131 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) 1132 { 1133 return ctx->param; 1134 } 1135 1136 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) 1137 { 1138 return ssl->param; 1139 } 1140 1141 void SSL_certs_clear(SSL *s) 1142 { 1143 ssl_cert_clear_certs(s->cert); 1144 } 1145 1146 void 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 1242 void SSL_set0_rbio(SSL *s, BIO *rbio) 1243 { 1244 BIO_free_all(s->rbio); 1245 s->rbio = rbio; 1246 } 1247 1248 void 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 1264 void 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 1304 BIO *SSL_get_rbio(const SSL *s) 1305 { 1306 return s->rbio; 1307 } 1308 1309 BIO *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 1321 int SSL_get_fd(const SSL *s) 1322 { 1323 return SSL_get_rfd(s); 1324 } 1325 1326 int 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 1338 int 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 1351 int 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 1369 int 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 1390 int 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' */ 1414 size_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' */ 1428 size_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 1441 int SSL_get_verify_mode(const SSL *s) 1442 { 1443 return s->verify_mode; 1444 } 1445 1446 int SSL_get_verify_depth(const SSL *s) 1447 { 1448 return X509_VERIFY_PARAM_get_depth(s->param); 1449 } 1450 1451 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) { 1452 return s->verify_callback; 1453 } 1454 1455 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) 1456 { 1457 return ctx->verify_mode; 1458 } 1459 1460 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) 1461 { 1462 return X509_VERIFY_PARAM_get_depth(ctx->param); 1463 } 1464 1465 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) { 1466 return ctx->default_verify_callback; 1467 } 1468 1469 void 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 1477 void SSL_set_verify_depth(SSL *s, int depth) 1478 { 1479 X509_VERIFY_PARAM_set_depth(s->param, depth); 1480 } 1481 1482 void SSL_set_read_ahead(SSL *s, int yes) 1483 { 1484 RECORD_LAYER_set_read_ahead(&s->rlayer, yes); 1485 } 1486 1487 int SSL_get_read_ahead(const SSL *s) 1488 { 1489 return RECORD_LAYER_get_read_ahead(&s->rlayer); 1490 } 1491 1492 int 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 1509 int 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 1525 X509 *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 1542 STACK_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 */ 1563 int 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 */ 1592 int 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 */ 1607 int 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 1625 int SSL_waiting_for_async(SSL *s) 1626 { 1627 if (s->job) 1628 return 1; 1629 1630 return 0; 1631 } 1632 1633 int 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 1642 int 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 1653 int 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 1663 int 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 1673 long SSL_get_default_timeout(const SSL *s) 1674 { 1675 return s->method->get_timeout(); 1676 } 1677 1678 static 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 1688 s->rwstate = SSL_NOTHING; 1689 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args, 1690 sizeof(struct ssl_async_args))) { 1691 case ASYNC_ERR: 1692 s->rwstate = SSL_NOTHING; 1693 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC); 1694 return -1; 1695 case ASYNC_PAUSE: 1696 s->rwstate = SSL_ASYNC_PAUSED; 1697 return -1; 1698 case ASYNC_NO_JOBS: 1699 s->rwstate = SSL_ASYNC_NO_JOBS; 1700 return -1; 1701 case ASYNC_FINISH: 1702 s->job = NULL; 1703 return ret; 1704 default: 1705 s->rwstate = SSL_NOTHING; 1706 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR); 1707 /* Shouldn't happen */ 1708 return -1; 1709 } 1710 } 1711 1712 static int ssl_io_intern(void *vargs) 1713 { 1714 struct ssl_async_args *args; 1715 SSL *s; 1716 void *buf; 1717 size_t num; 1718 1719 args = (struct ssl_async_args *)vargs; 1720 s = args->s; 1721 buf = args->buf; 1722 num = args->num; 1723 switch (args->type) { 1724 case READFUNC: 1725 return args->f.func_read(s, buf, num, &s->asyncrw); 1726 case WRITEFUNC: 1727 return args->f.func_write(s, buf, num, &s->asyncrw); 1728 case OTHERFUNC: 1729 return args->f.func_other(s); 1730 } 1731 return -1; 1732 } 1733 1734 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes) 1735 { 1736 if (s->handshake_func == NULL) { 1737 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED); 1738 return -1; 1739 } 1740 1741 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 1742 s->rwstate = SSL_NOTHING; 1743 return 0; 1744 } 1745 1746 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY 1747 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) { 1748 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1749 return 0; 1750 } 1751 /* 1752 * If we are a client and haven't received the ServerHello etc then we 1753 * better do that 1754 */ 1755 ossl_statem_check_finish_init(s, 0); 1756 1757 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 1758 struct ssl_async_args args; 1759 int ret; 1760 1761 args.s = s; 1762 args.buf = buf; 1763 args.num = num; 1764 args.type = READFUNC; 1765 args.f.func_read = s->method->ssl_read; 1766 1767 ret = ssl_start_async_job(s, &args, ssl_io_intern); 1768 *readbytes = s->asyncrw; 1769 return ret; 1770 } else { 1771 return s->method->ssl_read(s, buf, num, readbytes); 1772 } 1773 } 1774 1775 int SSL_read(SSL *s, void *buf, int num) 1776 { 1777 int ret; 1778 size_t readbytes; 1779 1780 if (num < 0) { 1781 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH); 1782 return -1; 1783 } 1784 1785 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes); 1786 1787 /* 1788 * The cast is safe here because ret should be <= INT_MAX because num is 1789 * <= INT_MAX 1790 */ 1791 if (ret > 0) 1792 ret = (int)readbytes; 1793 1794 return ret; 1795 } 1796 1797 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes) 1798 { 1799 int ret = ssl_read_internal(s, buf, num, readbytes); 1800 1801 if (ret < 0) 1802 ret = 0; 1803 return ret; 1804 } 1805 1806 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes) 1807 { 1808 int ret; 1809 1810 if (!s->server) { 1811 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1812 return SSL_READ_EARLY_DATA_ERROR; 1813 } 1814 1815 switch (s->early_data_state) { 1816 case SSL_EARLY_DATA_NONE: 1817 if (!SSL_in_before(s)) { 1818 SSLerr(SSL_F_SSL_READ_EARLY_DATA, 1819 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1820 return SSL_READ_EARLY_DATA_ERROR; 1821 } 1822 /* fall through */ 1823 1824 case SSL_EARLY_DATA_ACCEPT_RETRY: 1825 s->early_data_state = SSL_EARLY_DATA_ACCEPTING; 1826 ret = SSL_accept(s); 1827 if (ret <= 0) { 1828 /* NBIO or error */ 1829 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY; 1830 return SSL_READ_EARLY_DATA_ERROR; 1831 } 1832 /* fall through */ 1833 1834 case SSL_EARLY_DATA_READ_RETRY: 1835 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { 1836 s->early_data_state = SSL_EARLY_DATA_READING; 1837 ret = SSL_read_ex(s, buf, num, readbytes); 1838 /* 1839 * State machine will update early_data_state to 1840 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData 1841 * message 1842 */ 1843 if (ret > 0 || (ret <= 0 && s->early_data_state 1844 != SSL_EARLY_DATA_FINISHED_READING)) { 1845 s->early_data_state = SSL_EARLY_DATA_READ_RETRY; 1846 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS 1847 : SSL_READ_EARLY_DATA_ERROR; 1848 } 1849 } else { 1850 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING; 1851 } 1852 *readbytes = 0; 1853 return SSL_READ_EARLY_DATA_FINISH; 1854 1855 default: 1856 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1857 return SSL_READ_EARLY_DATA_ERROR; 1858 } 1859 } 1860 1861 int SSL_get_early_data_status(const SSL *s) 1862 { 1863 return s->ext.early_data; 1864 } 1865 1866 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes) 1867 { 1868 if (s->handshake_func == NULL) { 1869 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED); 1870 return -1; 1871 } 1872 1873 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { 1874 return 0; 1875 } 1876 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 1877 struct ssl_async_args args; 1878 int ret; 1879 1880 args.s = s; 1881 args.buf = buf; 1882 args.num = num; 1883 args.type = READFUNC; 1884 args.f.func_read = s->method->ssl_peek; 1885 1886 ret = ssl_start_async_job(s, &args, ssl_io_intern); 1887 *readbytes = s->asyncrw; 1888 return ret; 1889 } else { 1890 return s->method->ssl_peek(s, buf, num, readbytes); 1891 } 1892 } 1893 1894 int SSL_peek(SSL *s, void *buf, int num) 1895 { 1896 int ret; 1897 size_t readbytes; 1898 1899 if (num < 0) { 1900 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH); 1901 return -1; 1902 } 1903 1904 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes); 1905 1906 /* 1907 * The cast is safe here because ret should be <= INT_MAX because num is 1908 * <= INT_MAX 1909 */ 1910 if (ret > 0) 1911 ret = (int)readbytes; 1912 1913 return ret; 1914 } 1915 1916 1917 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes) 1918 { 1919 int ret = ssl_peek_internal(s, buf, num, readbytes); 1920 1921 if (ret < 0) 1922 ret = 0; 1923 return ret; 1924 } 1925 1926 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written) 1927 { 1928 if (s->handshake_func == NULL) { 1929 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED); 1930 return -1; 1931 } 1932 1933 if (s->shutdown & SSL_SENT_SHUTDOWN) { 1934 s->rwstate = SSL_NOTHING; 1935 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN); 1936 return -1; 1937 } 1938 1939 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY 1940 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY 1941 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) { 1942 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 1943 return 0; 1944 } 1945 /* If we are a client and haven't sent the Finished we better do that */ 1946 ossl_statem_check_finish_init(s, 1); 1947 1948 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 1949 int ret; 1950 struct ssl_async_args args; 1951 1952 args.s = s; 1953 args.buf = (void *)buf; 1954 args.num = num; 1955 args.type = WRITEFUNC; 1956 args.f.func_write = s->method->ssl_write; 1957 1958 ret = ssl_start_async_job(s, &args, ssl_io_intern); 1959 *written = s->asyncrw; 1960 return ret; 1961 } else { 1962 return s->method->ssl_write(s, buf, num, written); 1963 } 1964 } 1965 1966 int SSL_write(SSL *s, const void *buf, int num) 1967 { 1968 int ret; 1969 size_t written; 1970 1971 if (num < 0) { 1972 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH); 1973 return -1; 1974 } 1975 1976 ret = ssl_write_internal(s, buf, (size_t)num, &written); 1977 1978 /* 1979 * The cast is safe here because ret should be <= INT_MAX because num is 1980 * <= INT_MAX 1981 */ 1982 if (ret > 0) 1983 ret = (int)written; 1984 1985 return ret; 1986 } 1987 1988 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written) 1989 { 1990 int ret = ssl_write_internal(s, buf, num, written); 1991 1992 if (ret < 0) 1993 ret = 0; 1994 return ret; 1995 } 1996 1997 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written) 1998 { 1999 int ret, early_data_state; 2000 size_t writtmp; 2001 uint32_t partialwrite; 2002 2003 switch (s->early_data_state) { 2004 case SSL_EARLY_DATA_NONE: 2005 if (s->server 2006 || !SSL_in_before(s) 2007 || ((s->session == NULL || s->session->ext.max_early_data == 0) 2008 && (s->psk_use_session_cb == NULL))) { 2009 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, 2010 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2011 return 0; 2012 } 2013 /* fall through */ 2014 2015 case SSL_EARLY_DATA_CONNECT_RETRY: 2016 s->early_data_state = SSL_EARLY_DATA_CONNECTING; 2017 ret = SSL_connect(s); 2018 if (ret <= 0) { 2019 /* NBIO or error */ 2020 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY; 2021 return 0; 2022 } 2023 /* fall through */ 2024 2025 case SSL_EARLY_DATA_WRITE_RETRY: 2026 s->early_data_state = SSL_EARLY_DATA_WRITING; 2027 /* 2028 * We disable partial write for early data because we don't keep track 2029 * of how many bytes we've written between the SSL_write_ex() call and 2030 * the flush if the flush needs to be retried) 2031 */ 2032 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE; 2033 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE; 2034 ret = SSL_write_ex(s, buf, num, &writtmp); 2035 s->mode |= partialwrite; 2036 if (!ret) { 2037 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY; 2038 return ret; 2039 } 2040 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH; 2041 /* fall through */ 2042 2043 case SSL_EARLY_DATA_WRITE_FLUSH: 2044 /* The buffering BIO is still in place so we need to flush it */ 2045 if (statem_flush(s) != 1) 2046 return 0; 2047 *written = num; 2048 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY; 2049 return 1; 2050 2051 case SSL_EARLY_DATA_FINISHED_READING: 2052 case SSL_EARLY_DATA_READ_RETRY: 2053 early_data_state = s->early_data_state; 2054 /* We are a server writing to an unauthenticated client */ 2055 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING; 2056 ret = SSL_write_ex(s, buf, num, written); 2057 /* The buffering BIO is still in place */ 2058 if (ret) 2059 (void)BIO_flush(s->wbio); 2060 s->early_data_state = early_data_state; 2061 return ret; 2062 2063 default: 2064 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 2065 return 0; 2066 } 2067 } 2068 2069 int SSL_shutdown(SSL *s) 2070 { 2071 /* 2072 * Note that this function behaves differently from what one might 2073 * expect. Return values are 0 for no success (yet), 1 for success; but 2074 * calling it once is usually not enough, even if blocking I/O is used 2075 * (see ssl3_shutdown). 2076 */ 2077 2078 if (s->handshake_func == NULL) { 2079 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); 2080 return -1; 2081 } 2082 2083 if (!SSL_in_init(s)) { 2084 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 2085 struct ssl_async_args args; 2086 2087 args.s = s; 2088 args.type = OTHERFUNC; 2089 args.f.func_other = s->method->ssl_shutdown; 2090 2091 return ssl_start_async_job(s, &args, ssl_io_intern); 2092 } else { 2093 return s->method->ssl_shutdown(s); 2094 } 2095 } else { 2096 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT); 2097 return -1; 2098 } 2099 } 2100 2101 int SSL_key_update(SSL *s, int updatetype) 2102 { 2103 /* 2104 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been 2105 * negotiated, and that it is appropriate to call SSL_key_update() instead 2106 * of SSL_renegotiate(). 2107 */ 2108 if (!SSL_IS_TLS13(s)) { 2109 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION); 2110 return 0; 2111 } 2112 2113 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED 2114 && updatetype != SSL_KEY_UPDATE_REQUESTED) { 2115 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE); 2116 return 0; 2117 } 2118 2119 if (!SSL_is_init_finished(s)) { 2120 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT); 2121 return 0; 2122 } 2123 2124 if (RECORD_LAYER_write_pending(&s->rlayer)) { 2125 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_BAD_WRITE_RETRY); 2126 return 0; 2127 } 2128 2129 ossl_statem_set_in_init(s, 1); 2130 s->key_update = updatetype; 2131 return 1; 2132 } 2133 2134 int SSL_get_key_update_type(const SSL *s) 2135 { 2136 return s->key_update; 2137 } 2138 2139 int SSL_renegotiate(SSL *s) 2140 { 2141 if (SSL_IS_TLS13(s)) { 2142 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION); 2143 return 0; 2144 } 2145 2146 if ((s->options & SSL_OP_NO_RENEGOTIATION)) { 2147 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION); 2148 return 0; 2149 } 2150 2151 s->renegotiate = 1; 2152 s->new_session = 1; 2153 2154 return s->method->ssl_renegotiate(s); 2155 } 2156 2157 int SSL_renegotiate_abbreviated(SSL *s) 2158 { 2159 if (SSL_IS_TLS13(s)) { 2160 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION); 2161 return 0; 2162 } 2163 2164 if ((s->options & SSL_OP_NO_RENEGOTIATION)) { 2165 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION); 2166 return 0; 2167 } 2168 2169 s->renegotiate = 1; 2170 s->new_session = 0; 2171 2172 return s->method->ssl_renegotiate(s); 2173 } 2174 2175 int SSL_renegotiate_pending(const SSL *s) 2176 { 2177 /* 2178 * becomes true when negotiation is requested; false again once a 2179 * handshake has finished 2180 */ 2181 return (s->renegotiate != 0); 2182 } 2183 2184 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg) 2185 { 2186 long l; 2187 2188 switch (cmd) { 2189 case SSL_CTRL_GET_READ_AHEAD: 2190 return RECORD_LAYER_get_read_ahead(&s->rlayer); 2191 case SSL_CTRL_SET_READ_AHEAD: 2192 l = RECORD_LAYER_get_read_ahead(&s->rlayer); 2193 RECORD_LAYER_set_read_ahead(&s->rlayer, larg); 2194 return l; 2195 2196 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 2197 s->msg_callback_arg = parg; 2198 return 1; 2199 2200 case SSL_CTRL_MODE: 2201 return (s->mode |= larg); 2202 case SSL_CTRL_CLEAR_MODE: 2203 return (s->mode &= ~larg); 2204 case SSL_CTRL_GET_MAX_CERT_LIST: 2205 return (long)s->max_cert_list; 2206 case SSL_CTRL_SET_MAX_CERT_LIST: 2207 if (larg < 0) 2208 return 0; 2209 l = (long)s->max_cert_list; 2210 s->max_cert_list = (size_t)larg; 2211 return l; 2212 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 2213 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 2214 return 0; 2215 s->max_send_fragment = larg; 2216 if (s->max_send_fragment < s->split_send_fragment) 2217 s->split_send_fragment = s->max_send_fragment; 2218 return 1; 2219 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT: 2220 if ((size_t)larg > s->max_send_fragment || larg == 0) 2221 return 0; 2222 s->split_send_fragment = larg; 2223 return 1; 2224 case SSL_CTRL_SET_MAX_PIPELINES: 2225 if (larg < 1 || larg > SSL_MAX_PIPELINES) 2226 return 0; 2227 s->max_pipelines = larg; 2228 if (larg > 1) 2229 RECORD_LAYER_set_read_ahead(&s->rlayer, 1); 2230 return 1; 2231 case SSL_CTRL_GET_RI_SUPPORT: 2232 if (s->s3) 2233 return s->s3->send_connection_binding; 2234 else 2235 return 0; 2236 case SSL_CTRL_CERT_FLAGS: 2237 return (s->cert->cert_flags |= larg); 2238 case SSL_CTRL_CLEAR_CERT_FLAGS: 2239 return (s->cert->cert_flags &= ~larg); 2240 2241 case SSL_CTRL_GET_RAW_CIPHERLIST: 2242 if (parg) { 2243 if (s->s3->tmp.ciphers_raw == NULL) 2244 return 0; 2245 *(unsigned char **)parg = s->s3->tmp.ciphers_raw; 2246 return (int)s->s3->tmp.ciphers_rawlen; 2247 } else { 2248 return TLS_CIPHER_LEN; 2249 } 2250 case SSL_CTRL_GET_EXTMS_SUPPORT: 2251 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s)) 2252 return -1; 2253 if (s->session->flags & SSL_SESS_FLAG_EXTMS) 2254 return 1; 2255 else 2256 return 0; 2257 case SSL_CTRL_SET_MIN_PROTO_VERSION: 2258 return ssl_check_allowed_versions(larg, s->max_proto_version) 2259 && ssl_set_version_bound(s->ctx->method->version, (int)larg, 2260 &s->min_proto_version); 2261 case SSL_CTRL_GET_MIN_PROTO_VERSION: 2262 return s->min_proto_version; 2263 case SSL_CTRL_SET_MAX_PROTO_VERSION: 2264 return ssl_check_allowed_versions(s->min_proto_version, larg) 2265 && ssl_set_version_bound(s->ctx->method->version, (int)larg, 2266 &s->max_proto_version); 2267 case SSL_CTRL_GET_MAX_PROTO_VERSION: 2268 return s->max_proto_version; 2269 default: 2270 return s->method->ssl_ctrl(s, cmd, larg, parg); 2271 } 2272 } 2273 2274 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void)) 2275 { 2276 switch (cmd) { 2277 case SSL_CTRL_SET_MSG_CALLBACK: 2278 s->msg_callback = (void (*) 2279 (int write_p, int version, int content_type, 2280 const void *buf, size_t len, SSL *ssl, 2281 void *arg))(fp); 2282 return 1; 2283 2284 default: 2285 return s->method->ssl_callback_ctrl(s, cmd, fp); 2286 } 2287 } 2288 2289 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx) 2290 { 2291 return ctx->sessions; 2292 } 2293 2294 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 2295 { 2296 long l; 2297 /* For some cases with ctx == NULL perform syntax checks */ 2298 if (ctx == NULL) { 2299 switch (cmd) { 2300 #ifndef OPENSSL_NO_EC 2301 case SSL_CTRL_SET_GROUPS_LIST: 2302 return tls1_set_groups_list(NULL, NULL, parg); 2303 #endif 2304 case SSL_CTRL_SET_SIGALGS_LIST: 2305 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST: 2306 return tls1_set_sigalgs_list(NULL, parg, 0); 2307 default: 2308 return 0; 2309 } 2310 } 2311 2312 switch (cmd) { 2313 case SSL_CTRL_GET_READ_AHEAD: 2314 return ctx->read_ahead; 2315 case SSL_CTRL_SET_READ_AHEAD: 2316 l = ctx->read_ahead; 2317 ctx->read_ahead = larg; 2318 return l; 2319 2320 case SSL_CTRL_SET_MSG_CALLBACK_ARG: 2321 ctx->msg_callback_arg = parg; 2322 return 1; 2323 2324 case SSL_CTRL_GET_MAX_CERT_LIST: 2325 return (long)ctx->max_cert_list; 2326 case SSL_CTRL_SET_MAX_CERT_LIST: 2327 if (larg < 0) 2328 return 0; 2329 l = (long)ctx->max_cert_list; 2330 ctx->max_cert_list = (size_t)larg; 2331 return l; 2332 2333 case SSL_CTRL_SET_SESS_CACHE_SIZE: 2334 if (larg < 0) 2335 return 0; 2336 l = (long)ctx->session_cache_size; 2337 ctx->session_cache_size = (size_t)larg; 2338 return l; 2339 case SSL_CTRL_GET_SESS_CACHE_SIZE: 2340 return (long)ctx->session_cache_size; 2341 case SSL_CTRL_SET_SESS_CACHE_MODE: 2342 l = ctx->session_cache_mode; 2343 ctx->session_cache_mode = larg; 2344 return l; 2345 case SSL_CTRL_GET_SESS_CACHE_MODE: 2346 return ctx->session_cache_mode; 2347 2348 case SSL_CTRL_SESS_NUMBER: 2349 return lh_SSL_SESSION_num_items(ctx->sessions); 2350 case SSL_CTRL_SESS_CONNECT: 2351 return tsan_load(&ctx->stats.sess_connect); 2352 case SSL_CTRL_SESS_CONNECT_GOOD: 2353 return tsan_load(&ctx->stats.sess_connect_good); 2354 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: 2355 return tsan_load(&ctx->stats.sess_connect_renegotiate); 2356 case SSL_CTRL_SESS_ACCEPT: 2357 return tsan_load(&ctx->stats.sess_accept); 2358 case SSL_CTRL_SESS_ACCEPT_GOOD: 2359 return tsan_load(&ctx->stats.sess_accept_good); 2360 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: 2361 return tsan_load(&ctx->stats.sess_accept_renegotiate); 2362 case SSL_CTRL_SESS_HIT: 2363 return tsan_load(&ctx->stats.sess_hit); 2364 case SSL_CTRL_SESS_CB_HIT: 2365 return tsan_load(&ctx->stats.sess_cb_hit); 2366 case SSL_CTRL_SESS_MISSES: 2367 return tsan_load(&ctx->stats.sess_miss); 2368 case SSL_CTRL_SESS_TIMEOUTS: 2369 return tsan_load(&ctx->stats.sess_timeout); 2370 case SSL_CTRL_SESS_CACHE_FULL: 2371 return tsan_load(&ctx->stats.sess_cache_full); 2372 case SSL_CTRL_MODE: 2373 return (ctx->mode |= larg); 2374 case SSL_CTRL_CLEAR_MODE: 2375 return (ctx->mode &= ~larg); 2376 case SSL_CTRL_SET_MAX_SEND_FRAGMENT: 2377 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) 2378 return 0; 2379 ctx->max_send_fragment = larg; 2380 if (ctx->max_send_fragment < ctx->split_send_fragment) 2381 ctx->split_send_fragment = ctx->max_send_fragment; 2382 return 1; 2383 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT: 2384 if ((size_t)larg > ctx->max_send_fragment || larg == 0) 2385 return 0; 2386 ctx->split_send_fragment = larg; 2387 return 1; 2388 case SSL_CTRL_SET_MAX_PIPELINES: 2389 if (larg < 1 || larg > SSL_MAX_PIPELINES) 2390 return 0; 2391 ctx->max_pipelines = larg; 2392 return 1; 2393 case SSL_CTRL_CERT_FLAGS: 2394 return (ctx->cert->cert_flags |= larg); 2395 case SSL_CTRL_CLEAR_CERT_FLAGS: 2396 return (ctx->cert->cert_flags &= ~larg); 2397 case SSL_CTRL_SET_MIN_PROTO_VERSION: 2398 return ssl_check_allowed_versions(larg, ctx->max_proto_version) 2399 && ssl_set_version_bound(ctx->method->version, (int)larg, 2400 &ctx->min_proto_version); 2401 case SSL_CTRL_GET_MIN_PROTO_VERSION: 2402 return ctx->min_proto_version; 2403 case SSL_CTRL_SET_MAX_PROTO_VERSION: 2404 return ssl_check_allowed_versions(ctx->min_proto_version, larg) 2405 && ssl_set_version_bound(ctx->method->version, (int)larg, 2406 &ctx->max_proto_version); 2407 case SSL_CTRL_GET_MAX_PROTO_VERSION: 2408 return ctx->max_proto_version; 2409 default: 2410 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg); 2411 } 2412 } 2413 2414 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void)) 2415 { 2416 switch (cmd) { 2417 case SSL_CTRL_SET_MSG_CALLBACK: 2418 ctx->msg_callback = (void (*) 2419 (int write_p, int version, int content_type, 2420 const void *buf, size_t len, SSL *ssl, 2421 void *arg))(fp); 2422 return 1; 2423 2424 default: 2425 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp); 2426 } 2427 } 2428 2429 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) 2430 { 2431 if (a->id > b->id) 2432 return 1; 2433 if (a->id < b->id) 2434 return -1; 2435 return 0; 2436 } 2437 2438 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap, 2439 const SSL_CIPHER *const *bp) 2440 { 2441 if ((*ap)->id > (*bp)->id) 2442 return 1; 2443 if ((*ap)->id < (*bp)->id) 2444 return -1; 2445 return 0; 2446 } 2447 2448 /** return a STACK of the ciphers available for the SSL and in order of 2449 * preference */ 2450 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s) 2451 { 2452 if (s != NULL) { 2453 if (s->cipher_list != NULL) { 2454 return s->cipher_list; 2455 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { 2456 return s->ctx->cipher_list; 2457 } 2458 } 2459 return NULL; 2460 } 2461 2462 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s) 2463 { 2464 if ((s == NULL) || !s->server) 2465 return NULL; 2466 return s->peer_ciphers; 2467 } 2468 2469 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s) 2470 { 2471 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers; 2472 int i; 2473 2474 ciphers = SSL_get_ciphers(s); 2475 if (!ciphers) 2476 return NULL; 2477 if (!ssl_set_client_disabled(s)) 2478 return NULL; 2479 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { 2480 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i); 2481 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) { 2482 if (!sk) 2483 sk = sk_SSL_CIPHER_new_null(); 2484 if (!sk) 2485 return NULL; 2486 if (!sk_SSL_CIPHER_push(sk, c)) { 2487 sk_SSL_CIPHER_free(sk); 2488 return NULL; 2489 } 2490 } 2491 } 2492 return sk; 2493 } 2494 2495 /** return a STACK of the ciphers available for the SSL and in order of 2496 * algorithm id */ 2497 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s) 2498 { 2499 if (s != NULL) { 2500 if (s->cipher_list_by_id != NULL) { 2501 return s->cipher_list_by_id; 2502 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) { 2503 return s->ctx->cipher_list_by_id; 2504 } 2505 } 2506 return NULL; 2507 } 2508 2509 /** The old interface to get the same thing as SSL_get_ciphers() */ 2510 const char *SSL_get_cipher_list(const SSL *s, int n) 2511 { 2512 const SSL_CIPHER *c; 2513 STACK_OF(SSL_CIPHER) *sk; 2514 2515 if (s == NULL) 2516 return NULL; 2517 sk = SSL_get_ciphers(s); 2518 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) 2519 return NULL; 2520 c = sk_SSL_CIPHER_value(sk, n); 2521 if (c == NULL) 2522 return NULL; 2523 return c->name; 2524 } 2525 2526 /** return a STACK of the ciphers available for the SSL_CTX and in order of 2527 * preference */ 2528 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx) 2529 { 2530 if (ctx != NULL) 2531 return ctx->cipher_list; 2532 return NULL; 2533 } 2534 2535 /* 2536 * Distinguish between ciphers controlled by set_ciphersuite() and 2537 * set_cipher_list() when counting. 2538 */ 2539 static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk) 2540 { 2541 int i, num = 0; 2542 const SSL_CIPHER *c; 2543 2544 if (sk == NULL) 2545 return 0; 2546 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) { 2547 c = sk_SSL_CIPHER_value(sk, i); 2548 if (c->min_tls >= TLS1_3_VERSION) 2549 continue; 2550 num++; 2551 } 2552 return num; 2553 } 2554 2555 /** specify the ciphers to be used by default by the SSL_CTX */ 2556 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) 2557 { 2558 STACK_OF(SSL_CIPHER) *sk; 2559 2560 sk = ssl_create_cipher_list(ctx->method, ctx->tls13_ciphersuites, 2561 &ctx->cipher_list, &ctx->cipher_list_by_id, str, 2562 ctx->cert); 2563 /* 2564 * ssl_create_cipher_list may return an empty stack if it was unable to 2565 * find a cipher matching the given rule string (for example if the rule 2566 * string specifies a cipher which has been disabled). This is not an 2567 * error as far as ssl_create_cipher_list is concerned, and hence 2568 * ctx->cipher_list and ctx->cipher_list_by_id has been updated. 2569 */ 2570 if (sk == NULL) 2571 return 0; 2572 else if (cipher_list_tls12_num(sk) == 0) { 2573 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 2574 return 0; 2575 } 2576 return 1; 2577 } 2578 2579 /** specify the ciphers to be used by the SSL */ 2580 int SSL_set_cipher_list(SSL *s, const char *str) 2581 { 2582 STACK_OF(SSL_CIPHER) *sk; 2583 2584 sk = ssl_create_cipher_list(s->ctx->method, s->tls13_ciphersuites, 2585 &s->cipher_list, &s->cipher_list_by_id, str, 2586 s->cert); 2587 /* see comment in SSL_CTX_set_cipher_list */ 2588 if (sk == NULL) 2589 return 0; 2590 else if (cipher_list_tls12_num(sk) == 0) { 2591 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); 2592 return 0; 2593 } 2594 return 1; 2595 } 2596 2597 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size) 2598 { 2599 char *p; 2600 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk; 2601 const SSL_CIPHER *c; 2602 int i; 2603 2604 if (!s->server 2605 || s->peer_ciphers == NULL 2606 || size < 2) 2607 return NULL; 2608 2609 p = buf; 2610 clntsk = s->peer_ciphers; 2611 srvrsk = SSL_get_ciphers(s); 2612 if (clntsk == NULL || srvrsk == NULL) 2613 return NULL; 2614 2615 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0) 2616 return NULL; 2617 2618 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) { 2619 int n; 2620 2621 c = sk_SSL_CIPHER_value(clntsk, i); 2622 if (sk_SSL_CIPHER_find(srvrsk, c) < 0) 2623 continue; 2624 2625 n = strlen(c->name); 2626 if (n + 1 > size) { 2627 if (p != buf) 2628 --p; 2629 *p = '\0'; 2630 return buf; 2631 } 2632 strcpy(p, c->name); 2633 p += n; 2634 *(p++) = ':'; 2635 size -= n + 1; 2636 } 2637 p[-1] = '\0'; 2638 return buf; 2639 } 2640 2641 /** 2642 * Return the requested servername (SNI) value. Note that the behaviour varies 2643 * depending on: 2644 * - whether this is called by the client or the server, 2645 * - if we are before or during/after the handshake, 2646 * - if a resumption or normal handshake is being attempted/has occurred 2647 * - whether we have negotiated TLSv1.2 (or below) or TLSv1.3 2648 * 2649 * Note that only the host_name type is defined (RFC 3546). 2650 */ 2651 const char *SSL_get_servername(const SSL *s, const int type) 2652 { 2653 /* 2654 * If we don't know if we are the client or the server yet then we assume 2655 * client. 2656 */ 2657 int server = s->handshake_func == NULL ? 0 : s->server; 2658 if (type != TLSEXT_NAMETYPE_host_name) 2659 return NULL; 2660 2661 if (server) { 2662 /** 2663 * Server side 2664 * In TLSv1.3 on the server SNI is not associated with the session 2665 * but in TLSv1.2 or below it is. 2666 * 2667 * Before the handshake: 2668 * - return NULL 2669 * 2670 * During/after the handshake (TLSv1.2 or below resumption occurred): 2671 * - If a servername was accepted by the server in the original 2672 * handshake then it will return that servername, or NULL otherwise. 2673 * 2674 * During/after the handshake (TLSv1.2 or below resumption did not occur): 2675 * - The function will return the servername requested by the client in 2676 * this handshake or NULL if none was requested. 2677 */ 2678 if (s->hit && !SSL_IS_TLS13(s)) 2679 return s->session->ext.hostname; 2680 } else { 2681 /** 2682 * Client side 2683 * 2684 * Before the handshake: 2685 * - If a servername has been set via a call to 2686 * SSL_set_tlsext_host_name() then it will return that servername 2687 * - If one has not been set, but a TLSv1.2 resumption is being 2688 * attempted and the session from the original handshake had a 2689 * servername accepted by the server then it will return that 2690 * servername 2691 * - Otherwise it returns NULL 2692 * 2693 * During/after the handshake (TLSv1.2 or below resumption occurred): 2694 * - If the session from the original handshake had a servername accepted 2695 * by the server then it will return that servername. 2696 * - Otherwise it returns the servername set via 2697 * SSL_set_tlsext_host_name() (or NULL if it was not called). 2698 * 2699 * During/after the handshake (TLSv1.2 or below resumption did not occur): 2700 * - It will return the servername set via SSL_set_tlsext_host_name() 2701 * (or NULL if it was not called). 2702 */ 2703 if (SSL_in_before(s)) { 2704 if (s->ext.hostname == NULL 2705 && s->session != NULL 2706 && s->session->ssl_version != TLS1_3_VERSION) 2707 return s->session->ext.hostname; 2708 } else { 2709 if (!SSL_IS_TLS13(s) && s->hit && s->session->ext.hostname != NULL) 2710 return s->session->ext.hostname; 2711 } 2712 } 2713 2714 return s->ext.hostname; 2715 } 2716 2717 int SSL_get_servername_type(const SSL *s) 2718 { 2719 if (SSL_get_servername(s, TLSEXT_NAMETYPE_host_name) != NULL) 2720 return TLSEXT_NAMETYPE_host_name; 2721 return -1; 2722 } 2723 2724 /* 2725 * SSL_select_next_proto implements the standard protocol selection. It is 2726 * expected that this function is called from the callback set by 2727 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a 2728 * vector of 8-bit, length prefixed byte strings. The length byte itself is 2729 * not included in the length. A byte string of length 0 is invalid. No byte 2730 * string may be truncated. The current, but experimental algorithm for 2731 * selecting the protocol is: 1) If the server doesn't support NPN then this 2732 * is indicated to the callback. In this case, the client application has to 2733 * abort the connection or have a default application level protocol. 2) If 2734 * the server supports NPN, but advertises an empty list then the client 2735 * selects the first protocol in its list, but indicates via the API that this 2736 * fallback case was enacted. 3) Otherwise, the client finds the first 2737 * protocol in the server's list that it supports and selects this protocol. 2738 * This is because it's assumed that the server has better information about 2739 * which protocol a client should use. 4) If the client doesn't support any 2740 * of the server's advertised protocols, then this is treated the same as 2741 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was 2742 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. 2743 */ 2744 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, 2745 const unsigned char *server, 2746 unsigned int server_len, 2747 const unsigned char *client, unsigned int client_len) 2748 { 2749 unsigned int i, j; 2750 const unsigned char *result; 2751 int status = OPENSSL_NPN_UNSUPPORTED; 2752 2753 /* 2754 * For each protocol in server preference order, see if we support it. 2755 */ 2756 for (i = 0; i < server_len;) { 2757 for (j = 0; j < client_len;) { 2758 if (server[i] == client[j] && 2759 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) { 2760 /* We found a match */ 2761 result = &server[i]; 2762 status = OPENSSL_NPN_NEGOTIATED; 2763 goto found; 2764 } 2765 j += client[j]; 2766 j++; 2767 } 2768 i += server[i]; 2769 i++; 2770 } 2771 2772 /* There's no overlap between our protocols and the server's list. */ 2773 result = client; 2774 status = OPENSSL_NPN_NO_OVERLAP; 2775 2776 found: 2777 *out = (unsigned char *)result + 1; 2778 *outlen = result[0]; 2779 return status; 2780 } 2781 2782 #ifndef OPENSSL_NO_NEXTPROTONEG 2783 /* 2784 * SSL_get0_next_proto_negotiated sets *data and *len to point to the 2785 * client's requested protocol for this connection and returns 0. If the 2786 * client didn't request any protocol, then *data is set to NULL. Note that 2787 * the client can request any protocol it chooses. The value returned from 2788 * this function need not be a member of the list of supported protocols 2789 * provided by the callback. 2790 */ 2791 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, 2792 unsigned *len) 2793 { 2794 *data = s->ext.npn; 2795 if (!*data) { 2796 *len = 0; 2797 } else { 2798 *len = (unsigned int)s->ext.npn_len; 2799 } 2800 } 2801 2802 /* 2803 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when 2804 * a TLS server needs a list of supported protocols for Next Protocol 2805 * Negotiation. The returned list must be in wire format. The list is 2806 * returned by setting |out| to point to it and |outlen| to its length. This 2807 * memory will not be modified, but one should assume that the SSL* keeps a 2808 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it 2809 * wishes to advertise. Otherwise, no such extension will be included in the 2810 * ServerHello. 2811 */ 2812 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx, 2813 SSL_CTX_npn_advertised_cb_func cb, 2814 void *arg) 2815 { 2816 ctx->ext.npn_advertised_cb = cb; 2817 ctx->ext.npn_advertised_cb_arg = arg; 2818 } 2819 2820 /* 2821 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a 2822 * client needs to select a protocol from the server's provided list. |out| 2823 * must be set to point to the selected protocol (which may be within |in|). 2824 * The length of the protocol name must be written into |outlen|. The 2825 * server's advertised protocols are provided in |in| and |inlen|. The 2826 * callback can assume that |in| is syntactically valid. The client must 2827 * select a protocol. It is fatal to the connection if this callback returns 2828 * a value other than SSL_TLSEXT_ERR_OK. 2829 */ 2830 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx, 2831 SSL_CTX_npn_select_cb_func cb, 2832 void *arg) 2833 { 2834 ctx->ext.npn_select_cb = cb; 2835 ctx->ext.npn_select_cb_arg = arg; 2836 } 2837 #endif 2838 2839 static int alpn_value_ok(const unsigned char *protos, unsigned int protos_len) 2840 { 2841 unsigned int idx; 2842 2843 if (protos_len < 2 || protos == NULL) 2844 return 0; 2845 2846 for (idx = 0; idx < protos_len; idx += protos[idx] + 1) { 2847 if (protos[idx] == 0) 2848 return 0; 2849 } 2850 return idx == protos_len; 2851 } 2852 /* 2853 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| 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 */ 2857 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, 2858 unsigned int protos_len) 2859 { 2860 unsigned char *alpn; 2861 2862 if (protos_len == 0 || protos == NULL) { 2863 OPENSSL_free(ctx->ext.alpn); 2864 ctx->ext.alpn = NULL; 2865 ctx->ext.alpn_len = 0; 2866 return 0; 2867 } 2868 /* Not valid per RFC */ 2869 if (!alpn_value_ok(protos, protos_len)) 2870 return 1; 2871 2872 alpn = OPENSSL_memdup(protos, protos_len); 2873 if (alpn == NULL) { 2874 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE); 2875 return 1; 2876 } 2877 OPENSSL_free(ctx->ext.alpn); 2878 ctx->ext.alpn = alpn; 2879 ctx->ext.alpn_len = protos_len; 2880 2881 return 0; 2882 } 2883 2884 /* 2885 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|. 2886 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit 2887 * length-prefixed strings). Returns 0 on success. 2888 */ 2889 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos, 2890 unsigned int protos_len) 2891 { 2892 unsigned char *alpn; 2893 2894 if (protos_len == 0 || protos == NULL) { 2895 OPENSSL_free(ssl->ext.alpn); 2896 ssl->ext.alpn = NULL; 2897 ssl->ext.alpn_len = 0; 2898 return 0; 2899 } 2900 /* Not valid per RFC */ 2901 if (!alpn_value_ok(protos, protos_len)) 2902 return 1; 2903 2904 alpn = OPENSSL_memdup(protos, protos_len); 2905 if (alpn == NULL) { 2906 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE); 2907 return 1; 2908 } 2909 OPENSSL_free(ssl->ext.alpn); 2910 ssl->ext.alpn = alpn; 2911 ssl->ext.alpn_len = protos_len; 2912 2913 return 0; 2914 } 2915 2916 /* 2917 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is 2918 * called during ClientHello processing in order to select an ALPN protocol 2919 * from the client's list of offered protocols. 2920 */ 2921 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx, 2922 SSL_CTX_alpn_select_cb_func cb, 2923 void *arg) 2924 { 2925 ctx->ext.alpn_select_cb = cb; 2926 ctx->ext.alpn_select_cb_arg = arg; 2927 } 2928 2929 /* 2930 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|. 2931 * On return it sets |*data| to point to |*len| bytes of protocol name 2932 * (not including the leading length-prefix byte). If the server didn't 2933 * respond with a negotiated protocol then |*len| will be zero. 2934 */ 2935 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, 2936 unsigned int *len) 2937 { 2938 *data = NULL; 2939 if (ssl->s3) 2940 *data = ssl->s3->alpn_selected; 2941 if (*data == NULL) 2942 *len = 0; 2943 else 2944 *len = (unsigned int)ssl->s3->alpn_selected_len; 2945 } 2946 2947 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, 2948 const char *label, size_t llen, 2949 const unsigned char *context, size_t contextlen, 2950 int use_context) 2951 { 2952 if (s->session == NULL 2953 || (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER)) 2954 return -1; 2955 2956 return s->method->ssl3_enc->export_keying_material(s, out, olen, label, 2957 llen, context, 2958 contextlen, use_context); 2959 } 2960 2961 int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen, 2962 const char *label, size_t llen, 2963 const unsigned char *context, 2964 size_t contextlen) 2965 { 2966 if (s->version != TLS1_3_VERSION) 2967 return 0; 2968 2969 return tls13_export_keying_material_early(s, out, olen, label, llen, 2970 context, contextlen); 2971 } 2972 2973 static unsigned long ssl_session_hash(const SSL_SESSION *a) 2974 { 2975 const unsigned char *session_id = a->session_id; 2976 unsigned long l; 2977 unsigned char tmp_storage[4]; 2978 2979 if (a->session_id_length < sizeof(tmp_storage)) { 2980 memset(tmp_storage, 0, sizeof(tmp_storage)); 2981 memcpy(tmp_storage, a->session_id, a->session_id_length); 2982 session_id = tmp_storage; 2983 } 2984 2985 l = (unsigned long) 2986 ((unsigned long)session_id[0]) | 2987 ((unsigned long)session_id[1] << 8L) | 2988 ((unsigned long)session_id[2] << 16L) | 2989 ((unsigned long)session_id[3] << 24L); 2990 return l; 2991 } 2992 2993 /* 2994 * NB: If this function (or indeed the hash function which uses a sort of 2995 * coarser function than this one) is changed, ensure 2996 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on 2997 * being able to construct an SSL_SESSION that will collide with any existing 2998 * session with a matching session ID. 2999 */ 3000 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) 3001 { 3002 if (a->ssl_version != b->ssl_version) 3003 return 1; 3004 if (a->session_id_length != b->session_id_length) 3005 return 1; 3006 return memcmp(a->session_id, b->session_id, a->session_id_length); 3007 } 3008 3009 /* 3010 * These wrapper functions should remain rather than redeclaring 3011 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each 3012 * variable. The reason is that the functions aren't static, they're exposed 3013 * via ssl.h. 3014 */ 3015 3016 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth) 3017 { 3018 SSL_CTX *ret = NULL; 3019 3020 if (meth == NULL) { 3021 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); 3022 return NULL; 3023 } 3024 3025 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) 3026 return NULL; 3027 3028 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { 3029 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); 3030 goto err; 3031 } 3032 ret = OPENSSL_zalloc(sizeof(*ret)); 3033 if (ret == NULL) 3034 goto err; 3035 3036 ret->method = meth; 3037 ret->min_proto_version = 0; 3038 ret->max_proto_version = 0; 3039 ret->mode = SSL_MODE_AUTO_RETRY; 3040 ret->session_cache_mode = SSL_SESS_CACHE_SERVER; 3041 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; 3042 /* We take the system default. */ 3043 ret->session_timeout = meth->get_timeout(); 3044 ret->references = 1; 3045 ret->lock = CRYPTO_THREAD_lock_new(); 3046 if (ret->lock == NULL) { 3047 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 3048 OPENSSL_free(ret); 3049 return NULL; 3050 } 3051 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; 3052 ret->verify_mode = SSL_VERIFY_NONE; 3053 if ((ret->cert = ssl_cert_new()) == NULL) 3054 goto err; 3055 3056 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp); 3057 if (ret->sessions == NULL) 3058 goto err; 3059 ret->cert_store = X509_STORE_new(); 3060 if (ret->cert_store == NULL) 3061 goto err; 3062 #ifndef OPENSSL_NO_CT 3063 ret->ctlog_store = CTLOG_STORE_new(); 3064 if (ret->ctlog_store == NULL) 3065 goto err; 3066 #endif 3067 3068 if (!SSL_CTX_set_ciphersuites(ret, TLS_DEFAULT_CIPHERSUITES)) 3069 goto err; 3070 3071 if (!ssl_create_cipher_list(ret->method, 3072 ret->tls13_ciphersuites, 3073 &ret->cipher_list, &ret->cipher_list_by_id, 3074 SSL_DEFAULT_CIPHER_LIST, ret->cert) 3075 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { 3076 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); 3077 goto err2; 3078 } 3079 3080 ret->param = X509_VERIFY_PARAM_new(); 3081 if (ret->param == NULL) 3082 goto err; 3083 3084 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { 3085 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); 3086 goto err2; 3087 } 3088 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { 3089 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); 3090 goto err2; 3091 } 3092 3093 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL) 3094 goto err; 3095 3096 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL) 3097 goto err; 3098 3099 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data)) 3100 goto err; 3101 3102 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL) 3103 goto err; 3104 3105 /* No compression for DTLS */ 3106 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)) 3107 ret->comp_methods = SSL_COMP_get_compression_methods(); 3108 3109 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 3110 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; 3111 3112 /* Setup RFC5077 ticket keys */ 3113 if ((RAND_bytes(ret->ext.tick_key_name, 3114 sizeof(ret->ext.tick_key_name)) <= 0) 3115 || (RAND_priv_bytes(ret->ext.secure->tick_hmac_key, 3116 sizeof(ret->ext.secure->tick_hmac_key)) <= 0) 3117 || (RAND_priv_bytes(ret->ext.secure->tick_aes_key, 3118 sizeof(ret->ext.secure->tick_aes_key)) <= 0)) 3119 ret->options |= SSL_OP_NO_TICKET; 3120 3121 if (RAND_priv_bytes(ret->ext.cookie_hmac_key, 3122 sizeof(ret->ext.cookie_hmac_key)) <= 0) 3123 goto err; 3124 3125 #ifndef OPENSSL_NO_SRP 3126 if (!SSL_CTX_SRP_CTX_init(ret)) 3127 goto err; 3128 #endif 3129 #ifndef OPENSSL_NO_ENGINE 3130 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO 3131 # define eng_strx(x) #x 3132 # define eng_str(x) eng_strx(x) 3133 /* Use specific client engine automatically... ignore errors */ 3134 { 3135 ENGINE *eng; 3136 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 3137 if (!eng) { 3138 ERR_clear_error(); 3139 ENGINE_load_builtin_engines(); 3140 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); 3141 } 3142 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) 3143 ERR_clear_error(); 3144 } 3145 # endif 3146 #endif 3147 /* 3148 * Default is to connect to non-RI servers. When RI is more widely 3149 * deployed might change this. 3150 */ 3151 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; 3152 /* 3153 * Disable compression by default to prevent CRIME. Applications can 3154 * re-enable compression by configuring 3155 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION); 3156 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3 3157 * middlebox compatibility by default. This may be disabled by default in 3158 * a later OpenSSL version. 3159 */ 3160 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT; 3161 3162 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing; 3163 3164 /* 3165 * We cannot usefully set a default max_early_data here (which gets 3166 * propagated in SSL_new(), for the following reason: setting the 3167 * SSL field causes tls_construct_stoc_early_data() to tell the 3168 * client that early data will be accepted when constructing a TLS 1.3 3169 * session ticket, and the client will accordingly send us early data 3170 * when using that ticket (if the client has early data to send). 3171 * However, in order for the early data to actually be consumed by 3172 * the application, the application must also have calls to 3173 * SSL_read_early_data(); otherwise we'll just skip past the early data 3174 * and ignore it. So, since the application must add calls to 3175 * SSL_read_early_data(), we also require them to add 3176 * calls to SSL_CTX_set_max_early_data() in order to use early data, 3177 * eliminating the bandwidth-wasting early data in the case described 3178 * above. 3179 */ 3180 ret->max_early_data = 0; 3181 3182 /* 3183 * Default recv_max_early_data is a fully loaded single record. Could be 3184 * split across multiple records in practice. We set this differently to 3185 * max_early_data so that, in the default case, we do not advertise any 3186 * support for early_data, but if a client were to send us some (e.g. 3187 * because of an old, stale ticket) then we will tolerate it and skip over 3188 * it. 3189 */ 3190 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH; 3191 3192 /* By default we send two session tickets automatically in TLSv1.3 */ 3193 ret->num_tickets = 2; 3194 3195 ssl_ctx_system_config(ret); 3196 3197 return ret; 3198 err: 3199 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); 3200 err2: 3201 SSL_CTX_free(ret); 3202 return NULL; 3203 } 3204 3205 int SSL_CTX_up_ref(SSL_CTX *ctx) 3206 { 3207 int i; 3208 3209 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0) 3210 return 0; 3211 3212 REF_PRINT_COUNT("SSL_CTX", ctx); 3213 REF_ASSERT_ISNT(i < 2); 3214 return ((i > 1) ? 1 : 0); 3215 } 3216 3217 void SSL_CTX_free(SSL_CTX *a) 3218 { 3219 int i; 3220 3221 if (a == NULL) 3222 return; 3223 3224 CRYPTO_DOWN_REF(&a->references, &i, a->lock); 3225 REF_PRINT_COUNT("SSL_CTX", a); 3226 if (i > 0) 3227 return; 3228 REF_ASSERT_ISNT(i < 0); 3229 3230 X509_VERIFY_PARAM_free(a->param); 3231 dane_ctx_final(&a->dane); 3232 3233 /* 3234 * Free internal session cache. However: the remove_cb() may reference 3235 * the ex_data of SSL_CTX, thus the ex_data store can only be removed 3236 * after the sessions were flushed. 3237 * As the ex_data handling routines might also touch the session cache, 3238 * the most secure solution seems to be: empty (flush) the cache, then 3239 * free ex_data, then finally free the cache. 3240 * (See ticket [openssl.org #212].) 3241 */ 3242 if (a->sessions != NULL) 3243 SSL_CTX_flush_sessions(a, 0); 3244 3245 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); 3246 lh_SSL_SESSION_free(a->sessions); 3247 X509_STORE_free(a->cert_store); 3248 #ifndef OPENSSL_NO_CT 3249 CTLOG_STORE_free(a->ctlog_store); 3250 #endif 3251 sk_SSL_CIPHER_free(a->cipher_list); 3252 sk_SSL_CIPHER_free(a->cipher_list_by_id); 3253 sk_SSL_CIPHER_free(a->tls13_ciphersuites); 3254 ssl_cert_free(a->cert); 3255 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free); 3256 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free); 3257 sk_X509_pop_free(a->extra_certs, X509_free); 3258 a->comp_methods = NULL; 3259 #ifndef OPENSSL_NO_SRTP 3260 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); 3261 #endif 3262 #ifndef OPENSSL_NO_SRP 3263 SSL_CTX_SRP_CTX_free(a); 3264 #endif 3265 #ifndef OPENSSL_NO_ENGINE 3266 ENGINE_finish(a->client_cert_engine); 3267 #endif 3268 3269 #ifndef OPENSSL_NO_EC 3270 OPENSSL_free(a->ext.ecpointformats); 3271 OPENSSL_free(a->ext.supportedgroups); 3272 #endif 3273 OPENSSL_free(a->ext.alpn); 3274 OPENSSL_secure_free(a->ext.secure); 3275 3276 CRYPTO_THREAD_lock_free(a->lock); 3277 3278 OPENSSL_free(a); 3279 } 3280 3281 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) 3282 { 3283 ctx->default_passwd_callback = cb; 3284 } 3285 3286 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) 3287 { 3288 ctx->default_passwd_callback_userdata = u; 3289 } 3290 3291 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx) 3292 { 3293 return ctx->default_passwd_callback; 3294 } 3295 3296 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx) 3297 { 3298 return ctx->default_passwd_callback_userdata; 3299 } 3300 3301 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb) 3302 { 3303 s->default_passwd_callback = cb; 3304 } 3305 3306 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u) 3307 { 3308 s->default_passwd_callback_userdata = u; 3309 } 3310 3311 pem_password_cb *SSL_get_default_passwd_cb(SSL *s) 3312 { 3313 return s->default_passwd_callback; 3314 } 3315 3316 void *SSL_get_default_passwd_cb_userdata(SSL *s) 3317 { 3318 return s->default_passwd_callback_userdata; 3319 } 3320 3321 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, 3322 int (*cb) (X509_STORE_CTX *, void *), 3323 void *arg) 3324 { 3325 ctx->app_verify_callback = cb; 3326 ctx->app_verify_arg = arg; 3327 } 3328 3329 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, 3330 int (*cb) (int, X509_STORE_CTX *)) 3331 { 3332 ctx->verify_mode = mode; 3333 ctx->default_verify_callback = cb; 3334 } 3335 3336 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) 3337 { 3338 X509_VERIFY_PARAM_set_depth(ctx->param, depth); 3339 } 3340 3341 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg) 3342 { 3343 ssl_cert_set_cert_cb(c->cert, cb, arg); 3344 } 3345 3346 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg) 3347 { 3348 ssl_cert_set_cert_cb(s->cert, cb, arg); 3349 } 3350 3351 void ssl_set_masks(SSL *s) 3352 { 3353 CERT *c = s->cert; 3354 uint32_t *pvalid = s->s3->tmp.valid_flags; 3355 int rsa_enc, rsa_sign, dh_tmp, dsa_sign; 3356 unsigned long mask_k, mask_a; 3357 #ifndef OPENSSL_NO_EC 3358 int have_ecc_cert, ecdsa_ok; 3359 #endif 3360 if (c == NULL) 3361 return; 3362 3363 #ifndef OPENSSL_NO_DH 3364 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto); 3365 #else 3366 dh_tmp = 0; 3367 #endif 3368 3369 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID; 3370 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID; 3371 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID; 3372 #ifndef OPENSSL_NO_EC 3373 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID; 3374 #endif 3375 mask_k = 0; 3376 mask_a = 0; 3377 3378 #ifdef CIPHER_DEBUG 3379 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n", 3380 dh_tmp, rsa_enc, rsa_sign, dsa_sign); 3381 #endif 3382 3383 #ifndef OPENSSL_NO_GOST 3384 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) { 3385 mask_k |= SSL_kGOST; 3386 mask_a |= SSL_aGOST12; 3387 } 3388 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) { 3389 mask_k |= SSL_kGOST; 3390 mask_a |= SSL_aGOST12; 3391 } 3392 if (ssl_has_cert(s, SSL_PKEY_GOST01)) { 3393 mask_k |= SSL_kGOST; 3394 mask_a |= SSL_aGOST01; 3395 } 3396 #endif 3397 3398 if (rsa_enc) 3399 mask_k |= SSL_kRSA; 3400 3401 if (dh_tmp) 3402 mask_k |= SSL_kDHE; 3403 3404 /* 3405 * If we only have an RSA-PSS certificate allow RSA authentication 3406 * if TLS 1.2 and peer supports it. 3407 */ 3408 3409 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN) 3410 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN 3411 && TLS1_get_version(s) == TLS1_2_VERSION)) 3412 mask_a |= SSL_aRSA; 3413 3414 if (dsa_sign) { 3415 mask_a |= SSL_aDSS; 3416 } 3417 3418 mask_a |= SSL_aNULL; 3419 3420 /* 3421 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites 3422 * depending on the key usage extension. 3423 */ 3424 #ifndef OPENSSL_NO_EC 3425 if (have_ecc_cert) { 3426 uint32_t ex_kusage; 3427 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509); 3428 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE; 3429 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN)) 3430 ecdsa_ok = 0; 3431 if (ecdsa_ok) 3432 mask_a |= SSL_aECDSA; 3433 } 3434 /* Allow Ed25519 for TLS 1.2 if peer supports it */ 3435 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519) 3436 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN 3437 && TLS1_get_version(s) == TLS1_2_VERSION) 3438 mask_a |= SSL_aECDSA; 3439 3440 /* Allow Ed448 for TLS 1.2 if peer supports it */ 3441 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448) 3442 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN 3443 && TLS1_get_version(s) == TLS1_2_VERSION) 3444 mask_a |= SSL_aECDSA; 3445 #endif 3446 3447 #ifndef OPENSSL_NO_EC 3448 mask_k |= SSL_kECDHE; 3449 #endif 3450 3451 #ifndef OPENSSL_NO_PSK 3452 mask_k |= SSL_kPSK; 3453 mask_a |= SSL_aPSK; 3454 if (mask_k & SSL_kRSA) 3455 mask_k |= SSL_kRSAPSK; 3456 if (mask_k & SSL_kDHE) 3457 mask_k |= SSL_kDHEPSK; 3458 if (mask_k & SSL_kECDHE) 3459 mask_k |= SSL_kECDHEPSK; 3460 #endif 3461 3462 s->s3->tmp.mask_k = mask_k; 3463 s->s3->tmp.mask_a = mask_a; 3464 } 3465 3466 #ifndef OPENSSL_NO_EC 3467 3468 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) 3469 { 3470 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) { 3471 /* key usage, if present, must allow signing */ 3472 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) { 3473 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, 3474 SSL_R_ECC_CERT_NOT_FOR_SIGNING); 3475 return 0; 3476 } 3477 } 3478 return 1; /* all checks are ok */ 3479 } 3480 3481 #endif 3482 3483 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo, 3484 size_t *serverinfo_length) 3485 { 3486 CERT_PKEY *cpk = s->s3->tmp.cert; 3487 *serverinfo_length = 0; 3488 3489 if (cpk == NULL || cpk->serverinfo == NULL) 3490 return 0; 3491 3492 *serverinfo = cpk->serverinfo; 3493 *serverinfo_length = cpk->serverinfo_length; 3494 return 1; 3495 } 3496 3497 void ssl_update_cache(SSL *s, int mode) 3498 { 3499 int i; 3500 3501 /* 3502 * If the session_id_length is 0, we are not supposed to cache it, and it 3503 * would be rather hard to do anyway :-) 3504 */ 3505 if (s->session->session_id_length == 0) 3506 return; 3507 3508 /* 3509 * If sid_ctx_length is 0 there is no specific application context 3510 * associated with this session, so when we try to resume it and 3511 * SSL_VERIFY_PEER is requested to verify the client identity, we have no 3512 * indication that this is actually a session for the proper application 3513 * context, and the *handshake* will fail, not just the resumption attempt. 3514 * Do not cache (on the server) these sessions that are not resumable 3515 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set). 3516 */ 3517 if (s->server && s->session->sid_ctx_length == 0 3518 && (s->verify_mode & SSL_VERIFY_PEER) != 0) 3519 return; 3520 3521 i = s->session_ctx->session_cache_mode; 3522 if ((i & mode) != 0 3523 && (!s->hit || SSL_IS_TLS13(s))) { 3524 /* 3525 * Add the session to the internal cache. In server side TLSv1.3 we 3526 * normally don't do this because by default it's a full stateless ticket 3527 * with only a dummy session id so there is no reason to cache it, 3528 * unless: 3529 * - we are doing early_data, in which case we cache so that we can 3530 * detect replays 3531 * - the application has set a remove_session_cb so needs to know about 3532 * session timeout events 3533 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket 3534 */ 3535 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0 3536 && (!SSL_IS_TLS13(s) 3537 || !s->server 3538 || (s->max_early_data > 0 3539 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0) 3540 || s->session_ctx->remove_session_cb != NULL 3541 || (s->options & SSL_OP_NO_TICKET) != 0)) 3542 SSL_CTX_add_session(s->session_ctx, s->session); 3543 3544 /* 3545 * Add the session to the external cache. We do this even in server side 3546 * TLSv1.3 without early data because some applications just want to 3547 * know about the creation of a session and aren't doing a full cache. 3548 */ 3549 if (s->session_ctx->new_session_cb != NULL) { 3550 SSL_SESSION_up_ref(s->session); 3551 if (!s->session_ctx->new_session_cb(s, s->session)) 3552 SSL_SESSION_free(s->session); 3553 } 3554 } 3555 3556 /* auto flush every 255 connections */ 3557 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) { 3558 TSAN_QUALIFIER int *stat; 3559 if (mode & SSL_SESS_CACHE_CLIENT) 3560 stat = &s->session_ctx->stats.sess_connect_good; 3561 else 3562 stat = &s->session_ctx->stats.sess_accept_good; 3563 if ((tsan_load(stat) & 0xff) == 0xff) 3564 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL)); 3565 } 3566 } 3567 3568 const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx) 3569 { 3570 return ctx->method; 3571 } 3572 3573 const SSL_METHOD *SSL_get_ssl_method(const SSL *s) 3574 { 3575 return s->method; 3576 } 3577 3578 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) 3579 { 3580 int ret = 1; 3581 3582 if (s->method != meth) { 3583 const SSL_METHOD *sm = s->method; 3584 int (*hf) (SSL *) = s->handshake_func; 3585 3586 if (sm->version == meth->version) 3587 s->method = meth; 3588 else { 3589 sm->ssl_free(s); 3590 s->method = meth; 3591 ret = s->method->ssl_new(s); 3592 } 3593 3594 if (hf == sm->ssl_connect) 3595 s->handshake_func = meth->ssl_connect; 3596 else if (hf == sm->ssl_accept) 3597 s->handshake_func = meth->ssl_accept; 3598 } 3599 return ret; 3600 } 3601 3602 int SSL_get_error(const SSL *s, int i) 3603 { 3604 int reason; 3605 unsigned long l; 3606 BIO *bio; 3607 3608 if (i > 0) 3609 return SSL_ERROR_NONE; 3610 3611 /* 3612 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc, 3613 * where we do encode the error 3614 */ 3615 if ((l = ERR_peek_error()) != 0) { 3616 if (ERR_GET_LIB(l) == ERR_LIB_SYS) 3617 return SSL_ERROR_SYSCALL; 3618 else 3619 return SSL_ERROR_SSL; 3620 } 3621 3622 if (SSL_want_read(s)) { 3623 bio = SSL_get_rbio(s); 3624 if (BIO_should_read(bio)) 3625 return SSL_ERROR_WANT_READ; 3626 else if (BIO_should_write(bio)) 3627 /* 3628 * This one doesn't make too much sense ... We never try to write 3629 * to the rbio, and an application program where rbio and wbio 3630 * are separate couldn't even know what it should wait for. 3631 * However if we ever set s->rwstate incorrectly (so that we have 3632 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and 3633 * wbio *are* the same, this test works around that bug; so it 3634 * might be safer to keep it. 3635 */ 3636 return SSL_ERROR_WANT_WRITE; 3637 else if (BIO_should_io_special(bio)) { 3638 reason = BIO_get_retry_reason(bio); 3639 if (reason == BIO_RR_CONNECT) 3640 return SSL_ERROR_WANT_CONNECT; 3641 else if (reason == BIO_RR_ACCEPT) 3642 return SSL_ERROR_WANT_ACCEPT; 3643 else 3644 return SSL_ERROR_SYSCALL; /* unknown */ 3645 } 3646 } 3647 3648 if (SSL_want_write(s)) { 3649 /* Access wbio directly - in order to use the buffered bio if present */ 3650 bio = s->wbio; 3651 if (BIO_should_write(bio)) 3652 return SSL_ERROR_WANT_WRITE; 3653 else if (BIO_should_read(bio)) 3654 /* 3655 * See above (SSL_want_read(s) with BIO_should_write(bio)) 3656 */ 3657 return SSL_ERROR_WANT_READ; 3658 else if (BIO_should_io_special(bio)) { 3659 reason = BIO_get_retry_reason(bio); 3660 if (reason == BIO_RR_CONNECT) 3661 return SSL_ERROR_WANT_CONNECT; 3662 else if (reason == BIO_RR_ACCEPT) 3663 return SSL_ERROR_WANT_ACCEPT; 3664 else 3665 return SSL_ERROR_SYSCALL; 3666 } 3667 } 3668 if (SSL_want_x509_lookup(s)) 3669 return SSL_ERROR_WANT_X509_LOOKUP; 3670 if (SSL_want_async(s)) 3671 return SSL_ERROR_WANT_ASYNC; 3672 if (SSL_want_async_job(s)) 3673 return SSL_ERROR_WANT_ASYNC_JOB; 3674 if (SSL_want_client_hello_cb(s)) 3675 return SSL_ERROR_WANT_CLIENT_HELLO_CB; 3676 3677 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && 3678 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) 3679 return SSL_ERROR_ZERO_RETURN; 3680 3681 return SSL_ERROR_SYSCALL; 3682 } 3683 3684 static int ssl_do_handshake_intern(void *vargs) 3685 { 3686 struct ssl_async_args *args; 3687 SSL *s; 3688 3689 args = (struct ssl_async_args *)vargs; 3690 s = args->s; 3691 3692 return s->handshake_func(s); 3693 } 3694 3695 int SSL_do_handshake(SSL *s) 3696 { 3697 int ret = 1; 3698 3699 if (s->handshake_func == NULL) { 3700 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); 3701 return -1; 3702 } 3703 3704 ossl_statem_check_finish_init(s, -1); 3705 3706 s->method->ssl_renegotiate_check(s, 0); 3707 3708 if (SSL_in_init(s) || SSL_in_before(s)) { 3709 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) { 3710 struct ssl_async_args args; 3711 3712 args.s = s; 3713 3714 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern); 3715 } else { 3716 ret = s->handshake_func(s); 3717 } 3718 } 3719 return ret; 3720 } 3721 3722 void SSL_set_accept_state(SSL *s) 3723 { 3724 s->server = 1; 3725 s->shutdown = 0; 3726 ossl_statem_clear(s); 3727 s->handshake_func = s->method->ssl_accept; 3728 clear_ciphers(s); 3729 } 3730 3731 void SSL_set_connect_state(SSL *s) 3732 { 3733 s->server = 0; 3734 s->shutdown = 0; 3735 ossl_statem_clear(s); 3736 s->handshake_func = s->method->ssl_connect; 3737 clear_ciphers(s); 3738 } 3739 3740 int ssl_undefined_function(SSL *s) 3741 { 3742 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 3743 return 0; 3744 } 3745 3746 int ssl_undefined_void_function(void) 3747 { 3748 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, 3749 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 3750 return 0; 3751 } 3752 3753 int ssl_undefined_const_function(const SSL *s) 3754 { 3755 return 0; 3756 } 3757 3758 const SSL_METHOD *ssl_bad_method(int ver) 3759 { 3760 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); 3761 return NULL; 3762 } 3763 3764 const char *ssl_protocol_to_string(int version) 3765 { 3766 switch(version) 3767 { 3768 case TLS1_3_VERSION: 3769 return "TLSv1.3"; 3770 3771 case TLS1_2_VERSION: 3772 return "TLSv1.2"; 3773 3774 case TLS1_1_VERSION: 3775 return "TLSv1.1"; 3776 3777 case TLS1_VERSION: 3778 return "TLSv1"; 3779 3780 case SSL3_VERSION: 3781 return "SSLv3"; 3782 3783 case DTLS1_BAD_VER: 3784 return "DTLSv0.9"; 3785 3786 case DTLS1_VERSION: 3787 return "DTLSv1"; 3788 3789 case DTLS1_2_VERSION: 3790 return "DTLSv1.2"; 3791 3792 default: 3793 return "unknown"; 3794 } 3795 } 3796 3797 const char *SSL_get_version(const SSL *s) 3798 { 3799 return ssl_protocol_to_string(s->version); 3800 } 3801 3802 static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src) 3803 { 3804 STACK_OF(X509_NAME) *sk; 3805 X509_NAME *xn; 3806 int i; 3807 3808 if (src == NULL) { 3809 *dst = NULL; 3810 return 1; 3811 } 3812 3813 if ((sk = sk_X509_NAME_new_null()) == NULL) 3814 return 0; 3815 for (i = 0; i < sk_X509_NAME_num(src); i++) { 3816 xn = X509_NAME_dup(sk_X509_NAME_value(src, i)); 3817 if (xn == NULL) { 3818 sk_X509_NAME_pop_free(sk, X509_NAME_free); 3819 return 0; 3820 } 3821 if (sk_X509_NAME_insert(sk, xn, i) == 0) { 3822 X509_NAME_free(xn); 3823 sk_X509_NAME_pop_free(sk, X509_NAME_free); 3824 return 0; 3825 } 3826 } 3827 *dst = sk; 3828 3829 return 1; 3830 } 3831 3832 SSL *SSL_dup(SSL *s) 3833 { 3834 SSL *ret; 3835 int i; 3836 3837 /* If we're not quiescent, just up_ref! */ 3838 if (!SSL_in_init(s) || !SSL_in_before(s)) { 3839 CRYPTO_UP_REF(&s->references, &i, s->lock); 3840 return s; 3841 } 3842 3843 /* 3844 * Otherwise, copy configuration state, and session if set. 3845 */ 3846 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) 3847 return NULL; 3848 3849 if (s->session != NULL) { 3850 /* 3851 * Arranges to share the same session via up_ref. This "copies" 3852 * session-id, SSL_METHOD, sid_ctx, and 'cert' 3853 */ 3854 if (!SSL_copy_session_id(ret, s)) 3855 goto err; 3856 } else { 3857 /* 3858 * No session has been established yet, so we have to expect that 3859 * s->cert or ret->cert will be changed later -- they should not both 3860 * point to the same object, and thus we can't use 3861 * SSL_copy_session_id. 3862 */ 3863 if (!SSL_set_ssl_method(ret, s->method)) 3864 goto err; 3865 3866 if (s->cert != NULL) { 3867 ssl_cert_free(ret->cert); 3868 ret->cert = ssl_cert_dup(s->cert); 3869 if (ret->cert == NULL) 3870 goto err; 3871 } 3872 3873 if (!SSL_set_session_id_context(ret, s->sid_ctx, 3874 (int)s->sid_ctx_length)) 3875 goto err; 3876 } 3877 3878 if (!ssl_dane_dup(ret, s)) 3879 goto err; 3880 ret->version = s->version; 3881 ret->options = s->options; 3882 ret->min_proto_version = s->min_proto_version; 3883 ret->max_proto_version = s->max_proto_version; 3884 ret->mode = s->mode; 3885 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); 3886 SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); 3887 ret->msg_callback = s->msg_callback; 3888 ret->msg_callback_arg = s->msg_callback_arg; 3889 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s)); 3890 SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); 3891 ret->generate_session_id = s->generate_session_id; 3892 3893 SSL_set_info_callback(ret, SSL_get_info_callback(s)); 3894 3895 /* copy app data, a little dangerous perhaps */ 3896 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data)) 3897 goto err; 3898 3899 ret->server = s->server; 3900 if (s->handshake_func) { 3901 if (s->server) 3902 SSL_set_accept_state(ret); 3903 else 3904 SSL_set_connect_state(ret); 3905 } 3906 ret->shutdown = s->shutdown; 3907 ret->hit = s->hit; 3908 3909 ret->default_passwd_callback = s->default_passwd_callback; 3910 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata; 3911 3912 X509_VERIFY_PARAM_inherit(ret->param, s->param); 3913 3914 /* dup the cipher_list and cipher_list_by_id stacks */ 3915 if (s->cipher_list != NULL) { 3916 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) 3917 goto err; 3918 } 3919 if (s->cipher_list_by_id != NULL) 3920 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id)) 3921 == NULL) 3922 goto err; 3923 3924 /* Dup the client_CA list */ 3925 if (!dup_ca_names(&ret->ca_names, s->ca_names) 3926 || !dup_ca_names(&ret->client_ca_names, s->client_ca_names)) 3927 goto err; 3928 3929 return ret; 3930 3931 err: 3932 SSL_free(ret); 3933 return NULL; 3934 } 3935 3936 void ssl_clear_cipher_ctx(SSL *s) 3937 { 3938 if (s->enc_read_ctx != NULL) { 3939 EVP_CIPHER_CTX_free(s->enc_read_ctx); 3940 s->enc_read_ctx = NULL; 3941 } 3942 if (s->enc_write_ctx != NULL) { 3943 EVP_CIPHER_CTX_free(s->enc_write_ctx); 3944 s->enc_write_ctx = NULL; 3945 } 3946 #ifndef OPENSSL_NO_COMP 3947 COMP_CTX_free(s->expand); 3948 s->expand = NULL; 3949 COMP_CTX_free(s->compress); 3950 s->compress = NULL; 3951 #endif 3952 } 3953 3954 X509 *SSL_get_certificate(const SSL *s) 3955 { 3956 if (s->cert != NULL) 3957 return s->cert->key->x509; 3958 else 3959 return NULL; 3960 } 3961 3962 EVP_PKEY *SSL_get_privatekey(const SSL *s) 3963 { 3964 if (s->cert != NULL) 3965 return s->cert->key->privatekey; 3966 else 3967 return NULL; 3968 } 3969 3970 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) 3971 { 3972 if (ctx->cert != NULL) 3973 return ctx->cert->key->x509; 3974 else 3975 return NULL; 3976 } 3977 3978 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx) 3979 { 3980 if (ctx->cert != NULL) 3981 return ctx->cert->key->privatekey; 3982 else 3983 return NULL; 3984 } 3985 3986 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s) 3987 { 3988 if ((s->session != NULL) && (s->session->cipher != NULL)) 3989 return s->session->cipher; 3990 return NULL; 3991 } 3992 3993 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s) 3994 { 3995 return s->s3->tmp.new_cipher; 3996 } 3997 3998 const COMP_METHOD *SSL_get_current_compression(const SSL *s) 3999 { 4000 #ifndef OPENSSL_NO_COMP 4001 return s->compress ? COMP_CTX_get_method(s->compress) : NULL; 4002 #else 4003 return NULL; 4004 #endif 4005 } 4006 4007 const COMP_METHOD *SSL_get_current_expansion(const SSL *s) 4008 { 4009 #ifndef OPENSSL_NO_COMP 4010 return s->expand ? COMP_CTX_get_method(s->expand) : NULL; 4011 #else 4012 return NULL; 4013 #endif 4014 } 4015 4016 int ssl_init_wbio_buffer(SSL *s) 4017 { 4018 BIO *bbio; 4019 4020 if (s->bbio != NULL) { 4021 /* Already buffered. */ 4022 return 1; 4023 } 4024 4025 bbio = BIO_new(BIO_f_buffer()); 4026 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) { 4027 BIO_free(bbio); 4028 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); 4029 return 0; 4030 } 4031 s->bbio = bbio; 4032 s->wbio = BIO_push(bbio, s->wbio); 4033 4034 return 1; 4035 } 4036 4037 int ssl_free_wbio_buffer(SSL *s) 4038 { 4039 /* callers ensure s is never null */ 4040 if (s->bbio == NULL) 4041 return 1; 4042 4043 s->wbio = BIO_pop(s->wbio); 4044 BIO_free(s->bbio); 4045 s->bbio = NULL; 4046 4047 return 1; 4048 } 4049 4050 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) 4051 { 4052 ctx->quiet_shutdown = mode; 4053 } 4054 4055 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) 4056 { 4057 return ctx->quiet_shutdown; 4058 } 4059 4060 void SSL_set_quiet_shutdown(SSL *s, int mode) 4061 { 4062 s->quiet_shutdown = mode; 4063 } 4064 4065 int SSL_get_quiet_shutdown(const SSL *s) 4066 { 4067 return s->quiet_shutdown; 4068 } 4069 4070 void SSL_set_shutdown(SSL *s, int mode) 4071 { 4072 s->shutdown = mode; 4073 } 4074 4075 int SSL_get_shutdown(const SSL *s) 4076 { 4077 return s->shutdown; 4078 } 4079 4080 int SSL_version(const SSL *s) 4081 { 4082 return s->version; 4083 } 4084 4085 int SSL_client_version(const SSL *s) 4086 { 4087 return s->client_version; 4088 } 4089 4090 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl) 4091 { 4092 return ssl->ctx; 4093 } 4094 4095 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx) 4096 { 4097 CERT *new_cert; 4098 if (ssl->ctx == ctx) 4099 return ssl->ctx; 4100 if (ctx == NULL) 4101 ctx = ssl->session_ctx; 4102 new_cert = ssl_cert_dup(ctx->cert); 4103 if (new_cert == NULL) { 4104 return NULL; 4105 } 4106 4107 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) { 4108 ssl_cert_free(new_cert); 4109 return NULL; 4110 } 4111 4112 ssl_cert_free(ssl->cert); 4113 ssl->cert = new_cert; 4114 4115 /* 4116 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH), 4117 * so setter APIs must prevent invalid lengths from entering the system. 4118 */ 4119 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx))) 4120 return NULL; 4121 4122 /* 4123 * If the session ID context matches that of the parent SSL_CTX, 4124 * inherit it from the new SSL_CTX as well. If however the context does 4125 * not match (i.e., it was set per-ssl with SSL_set_session_id_context), 4126 * leave it unchanged. 4127 */ 4128 if ((ssl->ctx != NULL) && 4129 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) && 4130 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) { 4131 ssl->sid_ctx_length = ctx->sid_ctx_length; 4132 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx)); 4133 } 4134 4135 SSL_CTX_up_ref(ctx); 4136 SSL_CTX_free(ssl->ctx); /* decrement reference count */ 4137 ssl->ctx = ctx; 4138 4139 return ssl->ctx; 4140 } 4141 4142 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) 4143 { 4144 return X509_STORE_set_default_paths(ctx->cert_store); 4145 } 4146 4147 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx) 4148 { 4149 X509_LOOKUP *lookup; 4150 4151 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir()); 4152 if (lookup == NULL) 4153 return 0; 4154 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT); 4155 4156 /* Clear any errors if the default directory does not exist */ 4157 ERR_clear_error(); 4158 4159 return 1; 4160 } 4161 4162 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx) 4163 { 4164 X509_LOOKUP *lookup; 4165 4166 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file()); 4167 if (lookup == NULL) 4168 return 0; 4169 4170 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT); 4171 4172 /* Clear any errors if the default file does not exist */ 4173 ERR_clear_error(); 4174 4175 return 1; 4176 } 4177 4178 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, 4179 const char *CApath) 4180 { 4181 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath); 4182 } 4183 4184 void SSL_set_info_callback(SSL *ssl, 4185 void (*cb) (const SSL *ssl, int type, int val)) 4186 { 4187 ssl->info_callback = cb; 4188 } 4189 4190 /* 4191 * One compiler (Diab DCC) doesn't like argument names in returned function 4192 * pointer. 4193 */ 4194 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ , 4195 int /* type */ , 4196 int /* val */ ) { 4197 return ssl->info_callback; 4198 } 4199 4200 void SSL_set_verify_result(SSL *ssl, long arg) 4201 { 4202 ssl->verify_result = arg; 4203 } 4204 4205 long SSL_get_verify_result(const SSL *ssl) 4206 { 4207 return ssl->verify_result; 4208 } 4209 4210 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen) 4211 { 4212 if (outlen == 0) 4213 return sizeof(ssl->s3->client_random); 4214 if (outlen > sizeof(ssl->s3->client_random)) 4215 outlen = sizeof(ssl->s3->client_random); 4216 memcpy(out, ssl->s3->client_random, outlen); 4217 return outlen; 4218 } 4219 4220 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen) 4221 { 4222 if (outlen == 0) 4223 return sizeof(ssl->s3->server_random); 4224 if (outlen > sizeof(ssl->s3->server_random)) 4225 outlen = sizeof(ssl->s3->server_random); 4226 memcpy(out, ssl->s3->server_random, outlen); 4227 return outlen; 4228 } 4229 4230 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session, 4231 unsigned char *out, size_t outlen) 4232 { 4233 if (outlen == 0) 4234 return session->master_key_length; 4235 if (outlen > session->master_key_length) 4236 outlen = session->master_key_length; 4237 memcpy(out, session->master_key, outlen); 4238 return outlen; 4239 } 4240 4241 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in, 4242 size_t len) 4243 { 4244 if (len > sizeof(sess->master_key)) 4245 return 0; 4246 4247 memcpy(sess->master_key, in, len); 4248 sess->master_key_length = len; 4249 return 1; 4250 } 4251 4252 4253 int SSL_set_ex_data(SSL *s, int idx, void *arg) 4254 { 4255 return CRYPTO_set_ex_data(&s->ex_data, idx, arg); 4256 } 4257 4258 void *SSL_get_ex_data(const SSL *s, int idx) 4259 { 4260 return CRYPTO_get_ex_data(&s->ex_data, idx); 4261 } 4262 4263 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) 4264 { 4265 return CRYPTO_set_ex_data(&s->ex_data, idx, arg); 4266 } 4267 4268 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) 4269 { 4270 return CRYPTO_get_ex_data(&s->ex_data, idx); 4271 } 4272 4273 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) 4274 { 4275 return ctx->cert_store; 4276 } 4277 4278 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) 4279 { 4280 X509_STORE_free(ctx->cert_store); 4281 ctx->cert_store = store; 4282 } 4283 4284 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store) 4285 { 4286 if (store != NULL) 4287 X509_STORE_up_ref(store); 4288 SSL_CTX_set_cert_store(ctx, store); 4289 } 4290 4291 int SSL_want(const SSL *s) 4292 { 4293 return s->rwstate; 4294 } 4295 4296 /** 4297 * \brief Set the callback for generating temporary DH keys. 4298 * \param ctx the SSL context. 4299 * \param dh the callback 4300 */ 4301 4302 #ifndef OPENSSL_NO_DH 4303 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, 4304 DH *(*dh) (SSL *ssl, int is_export, 4305 int keylength)) 4306 { 4307 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); 4308 } 4309 4310 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export, 4311 int keylength)) 4312 { 4313 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); 4314 } 4315 #endif 4316 4317 #ifndef OPENSSL_NO_PSK 4318 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint) 4319 { 4320 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { 4321 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); 4322 return 0; 4323 } 4324 OPENSSL_free(ctx->cert->psk_identity_hint); 4325 if (identity_hint != NULL) { 4326 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint); 4327 if (ctx->cert->psk_identity_hint == NULL) 4328 return 0; 4329 } else 4330 ctx->cert->psk_identity_hint = NULL; 4331 return 1; 4332 } 4333 4334 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint) 4335 { 4336 if (s == NULL) 4337 return 0; 4338 4339 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { 4340 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); 4341 return 0; 4342 } 4343 OPENSSL_free(s->cert->psk_identity_hint); 4344 if (identity_hint != NULL) { 4345 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint); 4346 if (s->cert->psk_identity_hint == NULL) 4347 return 0; 4348 } else 4349 s->cert->psk_identity_hint = NULL; 4350 return 1; 4351 } 4352 4353 const char *SSL_get_psk_identity_hint(const SSL *s) 4354 { 4355 if (s == NULL || s->session == NULL) 4356 return NULL; 4357 return s->session->psk_identity_hint; 4358 } 4359 4360 const char *SSL_get_psk_identity(const SSL *s) 4361 { 4362 if (s == NULL || s->session == NULL) 4363 return NULL; 4364 return s->session->psk_identity; 4365 } 4366 4367 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb) 4368 { 4369 s->psk_client_callback = cb; 4370 } 4371 4372 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb) 4373 { 4374 ctx->psk_client_callback = cb; 4375 } 4376 4377 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb) 4378 { 4379 s->psk_server_callback = cb; 4380 } 4381 4382 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb) 4383 { 4384 ctx->psk_server_callback = cb; 4385 } 4386 #endif 4387 4388 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb) 4389 { 4390 s->psk_find_session_cb = cb; 4391 } 4392 4393 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx, 4394 SSL_psk_find_session_cb_func cb) 4395 { 4396 ctx->psk_find_session_cb = cb; 4397 } 4398 4399 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb) 4400 { 4401 s->psk_use_session_cb = cb; 4402 } 4403 4404 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx, 4405 SSL_psk_use_session_cb_func cb) 4406 { 4407 ctx->psk_use_session_cb = cb; 4408 } 4409 4410 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, 4411 void (*cb) (int write_p, int version, 4412 int content_type, const void *buf, 4413 size_t len, SSL *ssl, void *arg)) 4414 { 4415 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 4416 } 4417 4418 void SSL_set_msg_callback(SSL *ssl, 4419 void (*cb) (int write_p, int version, 4420 int content_type, const void *buf, 4421 size_t len, SSL *ssl, void *arg)) 4422 { 4423 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); 4424 } 4425 4426 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, 4427 int (*cb) (SSL *ssl, 4428 int 4429 is_forward_secure)) 4430 { 4431 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB, 4432 (void (*)(void))cb); 4433 } 4434 4435 void SSL_set_not_resumable_session_callback(SSL *ssl, 4436 int (*cb) (SSL *ssl, 4437 int is_forward_secure)) 4438 { 4439 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB, 4440 (void (*)(void))cb); 4441 } 4442 4443 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx, 4444 size_t (*cb) (SSL *ssl, int type, 4445 size_t len, void *arg)) 4446 { 4447 ctx->record_padding_cb = cb; 4448 } 4449 4450 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg) 4451 { 4452 ctx->record_padding_arg = arg; 4453 } 4454 4455 void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx) 4456 { 4457 return ctx->record_padding_arg; 4458 } 4459 4460 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size) 4461 { 4462 /* block size of 0 or 1 is basically no padding */ 4463 if (block_size == 1) 4464 ctx->block_padding = 0; 4465 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH) 4466 ctx->block_padding = block_size; 4467 else 4468 return 0; 4469 return 1; 4470 } 4471 4472 void SSL_set_record_padding_callback(SSL *ssl, 4473 size_t (*cb) (SSL *ssl, int type, 4474 size_t len, void *arg)) 4475 { 4476 ssl->record_padding_cb = cb; 4477 } 4478 4479 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg) 4480 { 4481 ssl->record_padding_arg = arg; 4482 } 4483 4484 void *SSL_get_record_padding_callback_arg(const SSL *ssl) 4485 { 4486 return ssl->record_padding_arg; 4487 } 4488 4489 int SSL_set_block_padding(SSL *ssl, size_t block_size) 4490 { 4491 /* block size of 0 or 1 is basically no padding */ 4492 if (block_size == 1) 4493 ssl->block_padding = 0; 4494 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH) 4495 ssl->block_padding = block_size; 4496 else 4497 return 0; 4498 return 1; 4499 } 4500 4501 int SSL_set_num_tickets(SSL *s, size_t num_tickets) 4502 { 4503 s->num_tickets = num_tickets; 4504 4505 return 1; 4506 } 4507 4508 size_t SSL_get_num_tickets(const SSL *s) 4509 { 4510 return s->num_tickets; 4511 } 4512 4513 int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets) 4514 { 4515 ctx->num_tickets = num_tickets; 4516 4517 return 1; 4518 } 4519 4520 size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx) 4521 { 4522 return ctx->num_tickets; 4523 } 4524 4525 /* 4526 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer 4527 * variable, freeing EVP_MD_CTX previously stored in that variable, if any. 4528 * If EVP_MD pointer is passed, initializes ctx with this |md|. 4529 * Returns the newly allocated ctx; 4530 */ 4531 4532 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) 4533 { 4534 ssl_clear_hash_ctx(hash); 4535 *hash = EVP_MD_CTX_new(); 4536 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) { 4537 EVP_MD_CTX_free(*hash); 4538 *hash = NULL; 4539 return NULL; 4540 } 4541 return *hash; 4542 } 4543 4544 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 4545 { 4546 4547 EVP_MD_CTX_free(*hash); 4548 *hash = NULL; 4549 } 4550 4551 /* Retrieve handshake hashes */ 4552 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen, 4553 size_t *hashlen) 4554 { 4555 EVP_MD_CTX *ctx = NULL; 4556 EVP_MD_CTX *hdgst = s->s3->handshake_dgst; 4557 int hashleni = EVP_MD_CTX_size(hdgst); 4558 int ret = 0; 4559 4560 if (hashleni < 0 || (size_t)hashleni > outlen) { 4561 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH, 4562 ERR_R_INTERNAL_ERROR); 4563 goto err; 4564 } 4565 4566 ctx = EVP_MD_CTX_new(); 4567 if (ctx == NULL) { 4568 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH, 4569 ERR_R_INTERNAL_ERROR); 4570 goto err; 4571 } 4572 4573 if (!EVP_MD_CTX_copy_ex(ctx, hdgst) 4574 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) { 4575 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH, 4576 ERR_R_INTERNAL_ERROR); 4577 goto err; 4578 } 4579 4580 *hashlen = hashleni; 4581 4582 ret = 1; 4583 err: 4584 EVP_MD_CTX_free(ctx); 4585 return ret; 4586 } 4587 4588 int SSL_session_reused(const SSL *s) 4589 { 4590 return s->hit; 4591 } 4592 4593 int SSL_is_server(const SSL *s) 4594 { 4595 return s->server; 4596 } 4597 4598 #if OPENSSL_API_COMPAT < 0x10100000L 4599 void SSL_set_debug(SSL *s, int debug) 4600 { 4601 /* Old function was do-nothing anyway... */ 4602 (void)s; 4603 (void)debug; 4604 } 4605 #endif 4606 4607 void SSL_set_security_level(SSL *s, int level) 4608 { 4609 s->cert->sec_level = level; 4610 } 4611 4612 int SSL_get_security_level(const SSL *s) 4613 { 4614 return s->cert->sec_level; 4615 } 4616 4617 void SSL_set_security_callback(SSL *s, 4618 int (*cb) (const SSL *s, const SSL_CTX *ctx, 4619 int op, int bits, int nid, 4620 void *other, void *ex)) 4621 { 4622 s->cert->sec_cb = cb; 4623 } 4624 4625 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s, 4626 const SSL_CTX *ctx, int op, 4627 int bits, int nid, void *other, 4628 void *ex) { 4629 return s->cert->sec_cb; 4630 } 4631 4632 void SSL_set0_security_ex_data(SSL *s, void *ex) 4633 { 4634 s->cert->sec_ex = ex; 4635 } 4636 4637 void *SSL_get0_security_ex_data(const SSL *s) 4638 { 4639 return s->cert->sec_ex; 4640 } 4641 4642 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level) 4643 { 4644 ctx->cert->sec_level = level; 4645 } 4646 4647 int SSL_CTX_get_security_level(const SSL_CTX *ctx) 4648 { 4649 return ctx->cert->sec_level; 4650 } 4651 4652 void SSL_CTX_set_security_callback(SSL_CTX *ctx, 4653 int (*cb) (const SSL *s, const SSL_CTX *ctx, 4654 int op, int bits, int nid, 4655 void *other, void *ex)) 4656 { 4657 ctx->cert->sec_cb = cb; 4658 } 4659 4660 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s, 4661 const SSL_CTX *ctx, 4662 int op, int bits, 4663 int nid, 4664 void *other, 4665 void *ex) { 4666 return ctx->cert->sec_cb; 4667 } 4668 4669 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex) 4670 { 4671 ctx->cert->sec_ex = ex; 4672 } 4673 4674 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx) 4675 { 4676 return ctx->cert->sec_ex; 4677 } 4678 4679 /* 4680 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that 4681 * can return unsigned long, instead of the generic long return value from the 4682 * control interface. 4683 */ 4684 unsigned long SSL_CTX_get_options(const SSL_CTX *ctx) 4685 { 4686 return ctx->options; 4687 } 4688 4689 unsigned long SSL_get_options(const SSL *s) 4690 { 4691 return s->options; 4692 } 4693 4694 unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op) 4695 { 4696 return ctx->options |= op; 4697 } 4698 4699 unsigned long SSL_set_options(SSL *s, unsigned long op) 4700 { 4701 return s->options |= op; 4702 } 4703 4704 unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op) 4705 { 4706 return ctx->options &= ~op; 4707 } 4708 4709 unsigned long SSL_clear_options(SSL *s, unsigned long op) 4710 { 4711 return s->options &= ~op; 4712 } 4713 4714 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s) 4715 { 4716 return s->verified_chain; 4717 } 4718 4719 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); 4720 4721 #ifndef OPENSSL_NO_CT 4722 4723 /* 4724 * Moves SCTs from the |src| stack to the |dst| stack. 4725 * The source of each SCT will be set to |origin|. 4726 * If |dst| points to a NULL pointer, a new stack will be created and owned by 4727 * the caller. 4728 * Returns the number of SCTs moved, or a negative integer if an error occurs. 4729 */ 4730 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src, 4731 sct_source_t origin) 4732 { 4733 int scts_moved = 0; 4734 SCT *sct = NULL; 4735 4736 if (*dst == NULL) { 4737 *dst = sk_SCT_new_null(); 4738 if (*dst == NULL) { 4739 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE); 4740 goto err; 4741 } 4742 } 4743 4744 while ((sct = sk_SCT_pop(src)) != NULL) { 4745 if (SCT_set_source(sct, origin) != 1) 4746 goto err; 4747 4748 if (sk_SCT_push(*dst, sct) <= 0) 4749 goto err; 4750 scts_moved += 1; 4751 } 4752 4753 return scts_moved; 4754 err: 4755 if (sct != NULL) 4756 sk_SCT_push(src, sct); /* Put the SCT back */ 4757 return -1; 4758 } 4759 4760 /* 4761 * Look for data collected during ServerHello and parse if found. 4762 * Returns the number of SCTs extracted. 4763 */ 4764 static int ct_extract_tls_extension_scts(SSL *s) 4765 { 4766 int scts_extracted = 0; 4767 4768 if (s->ext.scts != NULL) { 4769 const unsigned char *p = s->ext.scts; 4770 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len); 4771 4772 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION); 4773 4774 SCT_LIST_free(scts); 4775 } 4776 4777 return scts_extracted; 4778 } 4779 4780 /* 4781 * Checks for an OCSP response and then attempts to extract any SCTs found if it 4782 * contains an SCT X509 extension. They will be stored in |s->scts|. 4783 * Returns: 4784 * - The number of SCTs extracted, assuming an OCSP response exists. 4785 * - 0 if no OCSP response exists or it contains no SCTs. 4786 * - A negative integer if an error occurs. 4787 */ 4788 static int ct_extract_ocsp_response_scts(SSL *s) 4789 { 4790 # ifndef OPENSSL_NO_OCSP 4791 int scts_extracted = 0; 4792 const unsigned char *p; 4793 OCSP_BASICRESP *br = NULL; 4794 OCSP_RESPONSE *rsp = NULL; 4795 STACK_OF(SCT) *scts = NULL; 4796 int i; 4797 4798 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0) 4799 goto err; 4800 4801 p = s->ext.ocsp.resp; 4802 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len); 4803 if (rsp == NULL) 4804 goto err; 4805 4806 br = OCSP_response_get1_basic(rsp); 4807 if (br == NULL) 4808 goto err; 4809 4810 for (i = 0; i < OCSP_resp_count(br); ++i) { 4811 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i); 4812 4813 if (single == NULL) 4814 continue; 4815 4816 scts = 4817 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL); 4818 scts_extracted = 4819 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE); 4820 if (scts_extracted < 0) 4821 goto err; 4822 } 4823 err: 4824 SCT_LIST_free(scts); 4825 OCSP_BASICRESP_free(br); 4826 OCSP_RESPONSE_free(rsp); 4827 return scts_extracted; 4828 # else 4829 /* Behave as if no OCSP response exists */ 4830 return 0; 4831 # endif 4832 } 4833 4834 /* 4835 * Attempts to extract SCTs from the peer certificate. 4836 * Return the number of SCTs extracted, or a negative integer if an error 4837 * occurs. 4838 */ 4839 static int ct_extract_x509v3_extension_scts(SSL *s) 4840 { 4841 int scts_extracted = 0; 4842 X509 *cert = s->session != NULL ? s->session->peer : NULL; 4843 4844 if (cert != NULL) { 4845 STACK_OF(SCT) *scts = 4846 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL); 4847 4848 scts_extracted = 4849 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION); 4850 4851 SCT_LIST_free(scts); 4852 } 4853 4854 return scts_extracted; 4855 } 4856 4857 /* 4858 * Attempts to find all received SCTs by checking TLS extensions, the OCSP 4859 * response (if it exists) and X509v3 extensions in the certificate. 4860 * Returns NULL if an error occurs. 4861 */ 4862 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s) 4863 { 4864 if (!s->scts_parsed) { 4865 if (ct_extract_tls_extension_scts(s) < 0 || 4866 ct_extract_ocsp_response_scts(s) < 0 || 4867 ct_extract_x509v3_extension_scts(s) < 0) 4868 goto err; 4869 4870 s->scts_parsed = 1; 4871 } 4872 return s->scts; 4873 err: 4874 return NULL; 4875 } 4876 4877 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx, 4878 const STACK_OF(SCT) *scts, void *unused_arg) 4879 { 4880 return 1; 4881 } 4882 4883 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx, 4884 const STACK_OF(SCT) *scts, void *unused_arg) 4885 { 4886 int count = scts != NULL ? sk_SCT_num(scts) : 0; 4887 int i; 4888 4889 for (i = 0; i < count; ++i) { 4890 SCT *sct = sk_SCT_value(scts, i); 4891 int status = SCT_get_validation_status(sct); 4892 4893 if (status == SCT_VALIDATION_STATUS_VALID) 4894 return 1; 4895 } 4896 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS); 4897 return 0; 4898 } 4899 4900 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback, 4901 void *arg) 4902 { 4903 /* 4904 * Since code exists that uses the custom extension handler for CT, look 4905 * for this and throw an error if they have already registered to use CT. 4906 */ 4907 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx, 4908 TLSEXT_TYPE_signed_certificate_timestamp)) 4909 { 4910 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK, 4911 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED); 4912 return 0; 4913 } 4914 4915 if (callback != NULL) { 4916 /* 4917 * If we are validating CT, then we MUST accept SCTs served via OCSP 4918 */ 4919 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp)) 4920 return 0; 4921 } 4922 4923 s->ct_validation_callback = callback; 4924 s->ct_validation_callback_arg = arg; 4925 4926 return 1; 4927 } 4928 4929 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx, 4930 ssl_ct_validation_cb callback, void *arg) 4931 { 4932 /* 4933 * Since code exists that uses the custom extension handler for CT, look for 4934 * this and throw an error if they have already registered to use CT. 4935 */ 4936 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx, 4937 TLSEXT_TYPE_signed_certificate_timestamp)) 4938 { 4939 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK, 4940 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED); 4941 return 0; 4942 } 4943 4944 ctx->ct_validation_callback = callback; 4945 ctx->ct_validation_callback_arg = arg; 4946 return 1; 4947 } 4948 4949 int SSL_ct_is_enabled(const SSL *s) 4950 { 4951 return s->ct_validation_callback != NULL; 4952 } 4953 4954 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx) 4955 { 4956 return ctx->ct_validation_callback != NULL; 4957 } 4958 4959 int ssl_validate_ct(SSL *s) 4960 { 4961 int ret = 0; 4962 X509 *cert = s->session != NULL ? s->session->peer : NULL; 4963 X509 *issuer; 4964 SSL_DANE *dane = &s->dane; 4965 CT_POLICY_EVAL_CTX *ctx = NULL; 4966 const STACK_OF(SCT) *scts; 4967 4968 /* 4969 * If no callback is set, the peer is anonymous, or its chain is invalid, 4970 * skip SCT validation - just return success. Applications that continue 4971 * handshakes without certificates, with unverified chains, or pinned leaf 4972 * certificates are outside the scope of the WebPKI and CT. 4973 * 4974 * The above exclusions notwithstanding the vast majority of peers will 4975 * have rather ordinary certificate chains validated by typical 4976 * applications that perform certificate verification and therefore will 4977 * process SCTs when enabled. 4978 */ 4979 if (s->ct_validation_callback == NULL || cert == NULL || 4980 s->verify_result != X509_V_OK || 4981 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1) 4982 return 1; 4983 4984 /* 4985 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3) 4986 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2 4987 */ 4988 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) { 4989 switch (dane->mtlsa->usage) { 4990 case DANETLS_USAGE_DANE_TA: 4991 case DANETLS_USAGE_DANE_EE: 4992 return 1; 4993 } 4994 } 4995 4996 ctx = CT_POLICY_EVAL_CTX_new(); 4997 if (ctx == NULL) { 4998 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT, 4999 ERR_R_MALLOC_FAILURE); 5000 goto end; 5001 } 5002 5003 issuer = sk_X509_value(s->verified_chain, 1); 5004 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert); 5005 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer); 5006 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store); 5007 CT_POLICY_EVAL_CTX_set_time( 5008 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000); 5009 5010 scts = SSL_get0_peer_scts(s); 5011 5012 /* 5013 * This function returns success (> 0) only when all the SCTs are valid, 0 5014 * when some are invalid, and < 0 on various internal errors (out of 5015 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient 5016 * reason to abort the handshake, that decision is up to the callback. 5017 * Therefore, we error out only in the unexpected case that the return 5018 * value is negative. 5019 * 5020 * XXX: One might well argue that the return value of this function is an 5021 * unfortunate design choice. Its job is only to determine the validation 5022 * status of each of the provided SCTs. So long as it correctly separates 5023 * the wheat from the chaff it should return success. Failure in this case 5024 * ought to correspond to an inability to carry out its duties. 5025 */ 5026 if (SCT_LIST_validate(scts, ctx) < 0) { 5027 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT, 5028 SSL_R_SCT_VERIFICATION_FAILED); 5029 goto end; 5030 } 5031 5032 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg); 5033 if (ret < 0) 5034 ret = 0; /* This function returns 0 on failure */ 5035 if (!ret) 5036 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT, 5037 SSL_R_CALLBACK_FAILED); 5038 5039 end: 5040 CT_POLICY_EVAL_CTX_free(ctx); 5041 /* 5042 * With SSL_VERIFY_NONE the session may be cached and re-used despite a 5043 * failure return code here. Also the application may wish the complete 5044 * the handshake, and then disconnect cleanly at a higher layer, after 5045 * checking the verification status of the completed connection. 5046 * 5047 * We therefore force a certificate verification failure which will be 5048 * visible via SSL_get_verify_result() and cached as part of any resumed 5049 * session. 5050 * 5051 * Note: the permissive callback is for information gathering only, always 5052 * returns success, and does not affect verification status. Only the 5053 * strict callback or a custom application-specified callback can trigger 5054 * connection failure or record a verification error. 5055 */ 5056 if (ret <= 0) 5057 s->verify_result = X509_V_ERR_NO_VALID_SCTS; 5058 return ret; 5059 } 5060 5061 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode) 5062 { 5063 switch (validation_mode) { 5064 default: 5065 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE); 5066 return 0; 5067 case SSL_CT_VALIDATION_PERMISSIVE: 5068 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL); 5069 case SSL_CT_VALIDATION_STRICT: 5070 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL); 5071 } 5072 } 5073 5074 int SSL_enable_ct(SSL *s, int validation_mode) 5075 { 5076 switch (validation_mode) { 5077 default: 5078 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE); 5079 return 0; 5080 case SSL_CT_VALIDATION_PERMISSIVE: 5081 return SSL_set_ct_validation_callback(s, ct_permissive, NULL); 5082 case SSL_CT_VALIDATION_STRICT: 5083 return SSL_set_ct_validation_callback(s, ct_strict, NULL); 5084 } 5085 } 5086 5087 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx) 5088 { 5089 return CTLOG_STORE_load_default_file(ctx->ctlog_store); 5090 } 5091 5092 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path) 5093 { 5094 return CTLOG_STORE_load_file(ctx->ctlog_store, path); 5095 } 5096 5097 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs) 5098 { 5099 CTLOG_STORE_free(ctx->ctlog_store); 5100 ctx->ctlog_store = logs; 5101 } 5102 5103 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx) 5104 { 5105 return ctx->ctlog_store; 5106 } 5107 5108 #endif /* OPENSSL_NO_CT */ 5109 5110 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb, 5111 void *arg) 5112 { 5113 c->client_hello_cb = cb; 5114 c->client_hello_cb_arg = arg; 5115 } 5116 5117 int SSL_client_hello_isv2(SSL *s) 5118 { 5119 if (s->clienthello == NULL) 5120 return 0; 5121 return s->clienthello->isv2; 5122 } 5123 5124 unsigned int SSL_client_hello_get0_legacy_version(SSL *s) 5125 { 5126 if (s->clienthello == NULL) 5127 return 0; 5128 return s->clienthello->legacy_version; 5129 } 5130 5131 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out) 5132 { 5133 if (s->clienthello == NULL) 5134 return 0; 5135 if (out != NULL) 5136 *out = s->clienthello->random; 5137 return SSL3_RANDOM_SIZE; 5138 } 5139 5140 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out) 5141 { 5142 if (s->clienthello == NULL) 5143 return 0; 5144 if (out != NULL) 5145 *out = s->clienthello->session_id; 5146 return s->clienthello->session_id_len; 5147 } 5148 5149 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out) 5150 { 5151 if (s->clienthello == NULL) 5152 return 0; 5153 if (out != NULL) 5154 *out = PACKET_data(&s->clienthello->ciphersuites); 5155 return PACKET_remaining(&s->clienthello->ciphersuites); 5156 } 5157 5158 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out) 5159 { 5160 if (s->clienthello == NULL) 5161 return 0; 5162 if (out != NULL) 5163 *out = s->clienthello->compressions; 5164 return s->clienthello->compressions_len; 5165 } 5166 5167 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen) 5168 { 5169 RAW_EXTENSION *ext; 5170 int *present; 5171 size_t num = 0, i; 5172 5173 if (s->clienthello == NULL || out == NULL || outlen == NULL) 5174 return 0; 5175 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) { 5176 ext = s->clienthello->pre_proc_exts + i; 5177 if (ext->present) 5178 num++; 5179 } 5180 if (num == 0) { 5181 *out = NULL; 5182 *outlen = 0; 5183 return 1; 5184 } 5185 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) { 5186 SSLerr(SSL_F_SSL_CLIENT_HELLO_GET1_EXTENSIONS_PRESENT, 5187 ERR_R_MALLOC_FAILURE); 5188 return 0; 5189 } 5190 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) { 5191 ext = s->clienthello->pre_proc_exts + i; 5192 if (ext->present) { 5193 if (ext->received_order >= num) 5194 goto err; 5195 present[ext->received_order] = ext->type; 5196 } 5197 } 5198 *out = present; 5199 *outlen = num; 5200 return 1; 5201 err: 5202 OPENSSL_free(present); 5203 return 0; 5204 } 5205 5206 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out, 5207 size_t *outlen) 5208 { 5209 size_t i; 5210 RAW_EXTENSION *r; 5211 5212 if (s->clienthello == NULL) 5213 return 0; 5214 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) { 5215 r = s->clienthello->pre_proc_exts + i; 5216 if (r->present && r->type == type) { 5217 if (out != NULL) 5218 *out = PACKET_data(&r->data); 5219 if (outlen != NULL) 5220 *outlen = PACKET_remaining(&r->data); 5221 return 1; 5222 } 5223 } 5224 return 0; 5225 } 5226 5227 int SSL_free_buffers(SSL *ssl) 5228 { 5229 RECORD_LAYER *rl = &ssl->rlayer; 5230 5231 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl)) 5232 return 0; 5233 5234 RECORD_LAYER_release(rl); 5235 return 1; 5236 } 5237 5238 int SSL_alloc_buffers(SSL *ssl) 5239 { 5240 return ssl3_setup_buffers(ssl); 5241 } 5242 5243 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb) 5244 { 5245 ctx->keylog_callback = cb; 5246 } 5247 5248 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx) 5249 { 5250 return ctx->keylog_callback; 5251 } 5252 5253 static int nss_keylog_int(const char *prefix, 5254 SSL *ssl, 5255 const uint8_t *parameter_1, 5256 size_t parameter_1_len, 5257 const uint8_t *parameter_2, 5258 size_t parameter_2_len) 5259 { 5260 char *out = NULL; 5261 char *cursor = NULL; 5262 size_t out_len = 0; 5263 size_t i; 5264 size_t prefix_len; 5265 5266 if (ssl->ctx->keylog_callback == NULL) 5267 return 1; 5268 5269 /* 5270 * Our output buffer will contain the following strings, rendered with 5271 * space characters in between, terminated by a NULL character: first the 5272 * prefix, then the first parameter, then the second parameter. The 5273 * meaning of each parameter depends on the specific key material being 5274 * logged. Note that the first and second parameters are encoded in 5275 * hexadecimal, so we need a buffer that is twice their lengths. 5276 */ 5277 prefix_len = strlen(prefix); 5278 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3; 5279 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) { 5280 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT, 5281 ERR_R_MALLOC_FAILURE); 5282 return 0; 5283 } 5284 5285 strcpy(cursor, prefix); 5286 cursor += prefix_len; 5287 *cursor++ = ' '; 5288 5289 for (i = 0; i < parameter_1_len; i++) { 5290 sprintf(cursor, "%02x", parameter_1[i]); 5291 cursor += 2; 5292 } 5293 *cursor++ = ' '; 5294 5295 for (i = 0; i < parameter_2_len; i++) { 5296 sprintf(cursor, "%02x", parameter_2[i]); 5297 cursor += 2; 5298 } 5299 *cursor = '\0'; 5300 5301 ssl->ctx->keylog_callback(ssl, (const char *)out); 5302 OPENSSL_clear_free(out, out_len); 5303 return 1; 5304 5305 } 5306 5307 int ssl_log_rsa_client_key_exchange(SSL *ssl, 5308 const uint8_t *encrypted_premaster, 5309 size_t encrypted_premaster_len, 5310 const uint8_t *premaster, 5311 size_t premaster_len) 5312 { 5313 if (encrypted_premaster_len < 8) { 5314 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, 5315 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 5316 return 0; 5317 } 5318 5319 /* We only want the first 8 bytes of the encrypted premaster as a tag. */ 5320 return nss_keylog_int("RSA", 5321 ssl, 5322 encrypted_premaster, 5323 8, 5324 premaster, 5325 premaster_len); 5326 } 5327 5328 int ssl_log_secret(SSL *ssl, 5329 const char *label, 5330 const uint8_t *secret, 5331 size_t secret_len) 5332 { 5333 return nss_keylog_int(label, 5334 ssl, 5335 ssl->s3->client_random, 5336 SSL3_RANDOM_SIZE, 5337 secret, 5338 secret_len); 5339 } 5340 5341 #define SSLV2_CIPHER_LEN 3 5342 5343 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format) 5344 { 5345 int n; 5346 5347 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN; 5348 5349 if (PACKET_remaining(cipher_suites) == 0) { 5350 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST, 5351 SSL_R_NO_CIPHERS_SPECIFIED); 5352 return 0; 5353 } 5354 5355 if (PACKET_remaining(cipher_suites) % n != 0) { 5356 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5357 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 5358 return 0; 5359 } 5360 5361 OPENSSL_free(s->s3->tmp.ciphers_raw); 5362 s->s3->tmp.ciphers_raw = NULL; 5363 s->s3->tmp.ciphers_rawlen = 0; 5364 5365 if (sslv2format) { 5366 size_t numciphers = PACKET_remaining(cipher_suites) / n; 5367 PACKET sslv2ciphers = *cipher_suites; 5368 unsigned int leadbyte; 5369 unsigned char *raw; 5370 5371 /* 5372 * We store the raw ciphers list in SSLv3+ format so we need to do some 5373 * preprocessing to convert the list first. If there are any SSLv2 only 5374 * ciphersuites with a non-zero leading byte then we are going to 5375 * slightly over allocate because we won't store those. But that isn't a 5376 * problem. 5377 */ 5378 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN); 5379 s->s3->tmp.ciphers_raw = raw; 5380 if (raw == NULL) { 5381 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5382 ERR_R_MALLOC_FAILURE); 5383 return 0; 5384 } 5385 for (s->s3->tmp.ciphers_rawlen = 0; 5386 PACKET_remaining(&sslv2ciphers) > 0; 5387 raw += TLS_CIPHER_LEN) { 5388 if (!PACKET_get_1(&sslv2ciphers, &leadbyte) 5389 || (leadbyte == 0 5390 && !PACKET_copy_bytes(&sslv2ciphers, raw, 5391 TLS_CIPHER_LEN)) 5392 || (leadbyte != 0 5393 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) { 5394 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5395 SSL_R_BAD_PACKET); 5396 OPENSSL_free(s->s3->tmp.ciphers_raw); 5397 s->s3->tmp.ciphers_raw = NULL; 5398 s->s3->tmp.ciphers_rawlen = 0; 5399 return 0; 5400 } 5401 if (leadbyte == 0) 5402 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN; 5403 } 5404 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw, 5405 &s->s3->tmp.ciphers_rawlen)) { 5406 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST, 5407 ERR_R_INTERNAL_ERROR); 5408 return 0; 5409 } 5410 return 1; 5411 } 5412 5413 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len, 5414 int isv2format, STACK_OF(SSL_CIPHER) **sk, 5415 STACK_OF(SSL_CIPHER) **scsvs) 5416 { 5417 PACKET pkt; 5418 5419 if (!PACKET_buf_init(&pkt, bytes, len)) 5420 return 0; 5421 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0); 5422 } 5423 5424 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites, 5425 STACK_OF(SSL_CIPHER) **skp, 5426 STACK_OF(SSL_CIPHER) **scsvs_out, 5427 int sslv2format, int fatal) 5428 { 5429 const SSL_CIPHER *c; 5430 STACK_OF(SSL_CIPHER) *sk = NULL; 5431 STACK_OF(SSL_CIPHER) *scsvs = NULL; 5432 int n; 5433 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */ 5434 unsigned char cipher[SSLV2_CIPHER_LEN]; 5435 5436 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN; 5437 5438 if (PACKET_remaining(cipher_suites) == 0) { 5439 if (fatal) 5440 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST, 5441 SSL_R_NO_CIPHERS_SPECIFIED); 5442 else 5443 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED); 5444 return 0; 5445 } 5446 5447 if (PACKET_remaining(cipher_suites) % n != 0) { 5448 if (fatal) 5449 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST, 5450 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 5451 else 5452 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, 5453 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); 5454 return 0; 5455 } 5456 5457 sk = sk_SSL_CIPHER_new_null(); 5458 scsvs = sk_SSL_CIPHER_new_null(); 5459 if (sk == NULL || scsvs == NULL) { 5460 if (fatal) 5461 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST, 5462 ERR_R_MALLOC_FAILURE); 5463 else 5464 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 5465 goto err; 5466 } 5467 5468 while (PACKET_copy_bytes(cipher_suites, cipher, n)) { 5469 /* 5470 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the 5471 * first byte set to zero, while true SSLv2 ciphers have a non-zero 5472 * first byte. We don't support any true SSLv2 ciphers, so skip them. 5473 */ 5474 if (sslv2format && cipher[0] != '\0') 5475 continue; 5476 5477 /* For SSLv2-compat, ignore leading 0-byte. */ 5478 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1); 5479 if (c != NULL) { 5480 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) || 5481 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) { 5482 if (fatal) 5483 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 5484 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 5485 else 5486 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); 5487 goto err; 5488 } 5489 } 5490 } 5491 if (PACKET_remaining(cipher_suites) > 0) { 5492 if (fatal) 5493 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST, 5494 SSL_R_BAD_LENGTH); 5495 else 5496 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH); 5497 goto err; 5498 } 5499 5500 if (skp != NULL) 5501 *skp = sk; 5502 else 5503 sk_SSL_CIPHER_free(sk); 5504 if (scsvs_out != NULL) 5505 *scsvs_out = scsvs; 5506 else 5507 sk_SSL_CIPHER_free(scsvs); 5508 return 1; 5509 err: 5510 sk_SSL_CIPHER_free(sk); 5511 sk_SSL_CIPHER_free(scsvs); 5512 return 0; 5513 } 5514 5515 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data) 5516 { 5517 ctx->max_early_data = max_early_data; 5518 5519 return 1; 5520 } 5521 5522 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx) 5523 { 5524 return ctx->max_early_data; 5525 } 5526 5527 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data) 5528 { 5529 s->max_early_data = max_early_data; 5530 5531 return 1; 5532 } 5533 5534 uint32_t SSL_get_max_early_data(const SSL *s) 5535 { 5536 return s->max_early_data; 5537 } 5538 5539 int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data) 5540 { 5541 ctx->recv_max_early_data = recv_max_early_data; 5542 5543 return 1; 5544 } 5545 5546 uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx) 5547 { 5548 return ctx->recv_max_early_data; 5549 } 5550 5551 int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data) 5552 { 5553 s->recv_max_early_data = recv_max_early_data; 5554 5555 return 1; 5556 } 5557 5558 uint32_t SSL_get_recv_max_early_data(const SSL *s) 5559 { 5560 return s->recv_max_early_data; 5561 } 5562 5563 __owur unsigned int ssl_get_max_send_fragment(const SSL *ssl) 5564 { 5565 /* Return any active Max Fragment Len extension */ 5566 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)) 5567 return GET_MAX_FRAGMENT_LENGTH(ssl->session); 5568 5569 /* return current SSL connection setting */ 5570 return ssl->max_send_fragment; 5571 } 5572 5573 __owur unsigned int ssl_get_split_send_fragment(const SSL *ssl) 5574 { 5575 /* Return a value regarding an active Max Fragment Len extension */ 5576 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session) 5577 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session)) 5578 return GET_MAX_FRAGMENT_LENGTH(ssl->session); 5579 5580 /* else limit |split_send_fragment| to current |max_send_fragment| */ 5581 if (ssl->split_send_fragment > ssl->max_send_fragment) 5582 return ssl->max_send_fragment; 5583 5584 /* return current SSL connection setting */ 5585 return ssl->split_send_fragment; 5586 } 5587 5588 int SSL_stateless(SSL *s) 5589 { 5590 int ret; 5591 5592 /* Ensure there is no state left over from a previous invocation */ 5593 if (!SSL_clear(s)) 5594 return 0; 5595 5596 ERR_clear_error(); 5597 5598 s->s3->flags |= TLS1_FLAGS_STATELESS; 5599 ret = SSL_accept(s); 5600 s->s3->flags &= ~TLS1_FLAGS_STATELESS; 5601 5602 if (ret > 0 && s->ext.cookieok) 5603 return 1; 5604 5605 if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s)) 5606 return 0; 5607 5608 return -1; 5609 } 5610 5611 void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val) 5612 { 5613 ctx->pha_enabled = val; 5614 } 5615 5616 void SSL_set_post_handshake_auth(SSL *ssl, int val) 5617 { 5618 ssl->pha_enabled = val; 5619 } 5620 5621 int SSL_verify_client_post_handshake(SSL *ssl) 5622 { 5623 if (!SSL_IS_TLS13(ssl)) { 5624 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION); 5625 return 0; 5626 } 5627 if (!ssl->server) { 5628 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER); 5629 return 0; 5630 } 5631 5632 if (!SSL_is_init_finished(ssl)) { 5633 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT); 5634 return 0; 5635 } 5636 5637 switch (ssl->post_handshake_auth) { 5638 case SSL_PHA_NONE: 5639 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED); 5640 return 0; 5641 default: 5642 case SSL_PHA_EXT_SENT: 5643 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR); 5644 return 0; 5645 case SSL_PHA_EXT_RECEIVED: 5646 break; 5647 case SSL_PHA_REQUEST_PENDING: 5648 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING); 5649 return 0; 5650 case SSL_PHA_REQUESTED: 5651 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT); 5652 return 0; 5653 } 5654 5655 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING; 5656 5657 /* checks verify_mode and algorithm_auth */ 5658 if (!send_certificate_request(ssl)) { 5659 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */ 5660 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG); 5661 return 0; 5662 } 5663 5664 ossl_statem_set_in_init(ssl, 1); 5665 return 1; 5666 } 5667 5668 int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx, 5669 SSL_CTX_generate_session_ticket_fn gen_cb, 5670 SSL_CTX_decrypt_session_ticket_fn dec_cb, 5671 void *arg) 5672 { 5673 ctx->generate_ticket_cb = gen_cb; 5674 ctx->decrypt_ticket_cb = dec_cb; 5675 ctx->ticket_cb_data = arg; 5676 return 1; 5677 } 5678 5679 void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx, 5680 SSL_allow_early_data_cb_fn cb, 5681 void *arg) 5682 { 5683 ctx->allow_early_data_cb = cb; 5684 ctx->allow_early_data_cb_data = arg; 5685 } 5686 5687 void SSL_set_allow_early_data_cb(SSL *s, 5688 SSL_allow_early_data_cb_fn cb, 5689 void *arg) 5690 { 5691 s->allow_early_data_cb = cb; 5692 s->allow_early_data_cb_data = arg; 5693 } 5694