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