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