1 /* $OpenBSD: ssl_cert.c,v 1.95 2022/02/05 14:54:10 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 /* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * ECC cipher suite support in OpenSSL originally developed by 114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 115 */ 116 117 #include <sys/types.h> 118 119 #include <dirent.h> 120 #include <stdio.h> 121 #include <unistd.h> 122 123 #include <openssl/bio.h> 124 #include <openssl/bn.h> 125 #include <openssl/dh.h> 126 #include <openssl/objects.h> 127 #include <openssl/opensslconf.h> 128 #include <openssl/pem.h> 129 #include <openssl/x509v3.h> 130 131 #include "ssl_locl.h" 132 133 int 134 SSL_get_ex_data_X509_STORE_CTX_idx(void) 135 { 136 static volatile int ssl_x509_store_ctx_idx = -1; 137 int got_write_lock = 0; 138 139 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 140 141 if (ssl_x509_store_ctx_idx < 0) { 142 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 143 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 144 got_write_lock = 1; 145 146 if (ssl_x509_store_ctx_idx < 0) { 147 ssl_x509_store_ctx_idx = 148 X509_STORE_CTX_get_ex_new_index( 149 0, "SSL for verify callback", NULL, NULL, NULL); 150 } 151 } 152 153 if (got_write_lock) 154 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 155 else 156 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 157 158 return ssl_x509_store_ctx_idx; 159 } 160 161 SSL_CERT * 162 ssl_cert_new(void) 163 { 164 SSL_CERT *ret; 165 166 ret = calloc(1, sizeof(SSL_CERT)); 167 if (ret == NULL) { 168 SSLerrorx(ERR_R_MALLOC_FAILURE); 169 return (NULL); 170 } 171 ret->key = &(ret->pkeys[SSL_PKEY_RSA]); 172 ret->references = 1; 173 return (ret); 174 } 175 176 SSL_CERT * 177 ssl_cert_dup(SSL_CERT *cert) 178 { 179 SSL_CERT *ret; 180 int i; 181 182 ret = calloc(1, sizeof(SSL_CERT)); 183 if (ret == NULL) { 184 SSLerrorx(ERR_R_MALLOC_FAILURE); 185 return (NULL); 186 } 187 188 /* 189 * same as ret->key = ret->pkeys + (cert->key - cert->pkeys), 190 * if you find that more readable 191 */ 192 ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]]; 193 194 ret->valid = cert->valid; 195 ret->mask_k = cert->mask_k; 196 ret->mask_a = cert->mask_a; 197 198 if (cert->dhe_params != NULL) { 199 ret->dhe_params = DHparams_dup(cert->dhe_params); 200 if (ret->dhe_params == NULL) { 201 SSLerrorx(ERR_R_DH_LIB); 202 goto err; 203 } 204 } 205 ret->dhe_params_cb = cert->dhe_params_cb; 206 ret->dhe_params_auto = cert->dhe_params_auto; 207 208 for (i = 0; i < SSL_PKEY_NUM; i++) { 209 if (cert->pkeys[i].x509 != NULL) { 210 ret->pkeys[i].x509 = cert->pkeys[i].x509; 211 X509_up_ref(ret->pkeys[i].x509); 212 } 213 214 if (cert->pkeys[i].privatekey != NULL) { 215 ret->pkeys[i].privatekey = cert->pkeys[i].privatekey; 216 EVP_PKEY_up_ref(ret->pkeys[i].privatekey); 217 switch (i) { 218 /* 219 * If there was anything special to do for 220 * certain types of keys, we'd do it here. 221 * (Nothing at the moment, I think.) 222 */ 223 224 case SSL_PKEY_RSA: 225 /* We have an RSA key. */ 226 break; 227 228 case SSL_PKEY_ECC: 229 /* We have an ECC key */ 230 break; 231 232 case SSL_PKEY_GOST01: 233 /* We have a GOST key */ 234 break; 235 236 default: 237 /* Can't happen. */ 238 SSLerrorx(SSL_R_LIBRARY_BUG); 239 } 240 } 241 242 if (cert->pkeys[i].chain != NULL) { 243 if ((ret->pkeys[i].chain = 244 X509_chain_up_ref(cert->pkeys[i].chain)) == NULL) 245 goto err; 246 } 247 } 248 249 /* 250 * ret->extra_certs *should* exist, but currently the own certificate 251 * chain is held inside SSL_CTX 252 */ 253 254 ret->references = 1; 255 256 return (ret); 257 258 err: 259 DH_free(ret->dhe_params); 260 261 for (i = 0; i < SSL_PKEY_NUM; i++) { 262 X509_free(ret->pkeys[i].x509); 263 EVP_PKEY_free(ret->pkeys[i].privatekey); 264 sk_X509_pop_free(ret->pkeys[i].chain, X509_free); 265 } 266 free (ret); 267 return NULL; 268 } 269 270 271 void 272 ssl_cert_free(SSL_CERT *c) 273 { 274 int i; 275 276 if (c == NULL) 277 return; 278 279 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT); 280 if (i > 0) 281 return; 282 283 DH_free(c->dhe_params); 284 285 for (i = 0; i < SSL_PKEY_NUM; i++) { 286 X509_free(c->pkeys[i].x509); 287 EVP_PKEY_free(c->pkeys[i].privatekey); 288 sk_X509_pop_free(c->pkeys[i].chain, X509_free); 289 } 290 291 free(c); 292 } 293 294 int 295 ssl_cert_set0_chain(SSL_CERT *c, STACK_OF(X509) *chain) 296 { 297 if (c->key == NULL) 298 return 0; 299 300 sk_X509_pop_free(c->key->chain, X509_free); 301 c->key->chain = chain; 302 303 return 1; 304 } 305 306 int 307 ssl_cert_set1_chain(SSL_CERT *c, STACK_OF(X509) *chain) 308 { 309 STACK_OF(X509) *new_chain = NULL; 310 311 if (chain != NULL) { 312 if ((new_chain = X509_chain_up_ref(chain)) == NULL) 313 return 0; 314 } 315 if (!ssl_cert_set0_chain(c, new_chain)) { 316 sk_X509_pop_free(new_chain, X509_free); 317 return 0; 318 } 319 320 return 1; 321 } 322 323 int 324 ssl_cert_add0_chain_cert(SSL_CERT *c, X509 *cert) 325 { 326 if (c->key == NULL) 327 return 0; 328 329 if (c->key->chain == NULL) { 330 if ((c->key->chain = sk_X509_new_null()) == NULL) 331 return 0; 332 } 333 if (!sk_X509_push(c->key->chain, cert)) 334 return 0; 335 336 return 1; 337 } 338 339 int 340 ssl_cert_add1_chain_cert(SSL_CERT *c, X509 *cert) 341 { 342 if (!ssl_cert_add0_chain_cert(c, cert)) 343 return 0; 344 345 X509_up_ref(cert); 346 347 return 1; 348 } 349 350 int 351 ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) 352 { 353 X509_STORE_CTX *ctx = NULL; 354 X509 *x; 355 int ret = 0; 356 357 if ((sk == NULL) || (sk_X509_num(sk) == 0)) 358 goto err; 359 360 if ((ctx = X509_STORE_CTX_new()) == NULL) 361 goto err; 362 363 x = sk_X509_value(sk, 0); 364 if (!X509_STORE_CTX_init(ctx, s->ctx->cert_store, x, sk)) { 365 SSLerror(s, ERR_R_X509_LIB); 366 goto err; 367 } 368 X509_STORE_CTX_set_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s); 369 370 /* 371 * We need to inherit the verify parameters. These can be 372 * determined by the context: if its a server it will verify 373 * SSL client certificates or vice versa. 374 */ 375 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server"); 376 377 /* 378 * Anything non-default in "param" should overwrite anything 379 * in the ctx. 380 */ 381 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(ctx), s->param); 382 383 if (s->internal->verify_callback) 384 X509_STORE_CTX_set_verify_cb(ctx, s->internal->verify_callback); 385 386 if (s->ctx->internal->app_verify_callback != NULL) 387 ret = s->ctx->internal->app_verify_callback(ctx, 388 s->ctx->internal->app_verify_arg); 389 else 390 ret = X509_verify_cert(ctx); 391 392 s->verify_result = X509_STORE_CTX_get_error(ctx); 393 sk_X509_pop_free(s->internal->verified_chain, X509_free); 394 s->internal->verified_chain = NULL; 395 if (X509_STORE_CTX_get0_chain(ctx) != NULL) { 396 s->internal->verified_chain = X509_STORE_CTX_get1_chain(ctx); 397 if (s->internal->verified_chain == NULL) { 398 SSLerrorx(ERR_R_MALLOC_FAILURE); 399 ret = 0; 400 } 401 } 402 403 err: 404 X509_STORE_CTX_free(ctx); 405 406 return (ret); 407 } 408 409 static void 410 set_client_CA_list(STACK_OF(X509_NAME) **ca_list, 411 STACK_OF(X509_NAME) *name_list) 412 { 413 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); 414 *ca_list = name_list; 415 } 416 417 STACK_OF(X509_NAME) * 418 SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) 419 { 420 int i; 421 STACK_OF(X509_NAME) *ret; 422 X509_NAME *name = NULL; 423 424 if ((ret = sk_X509_NAME_new_null()) == NULL) 425 goto err; 426 427 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 428 if ((name = X509_NAME_dup(sk_X509_NAME_value(sk, i))) == NULL) 429 goto err; 430 if (!sk_X509_NAME_push(ret, name)) 431 goto err; 432 } 433 return (ret); 434 435 err: 436 X509_NAME_free(name); 437 sk_X509_NAME_pop_free(ret, X509_NAME_free); 438 return NULL; 439 } 440 441 void 442 SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 443 { 444 set_client_CA_list(&(s->internal->client_CA), name_list); 445 } 446 447 void 448 SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 449 { 450 set_client_CA_list(&(ctx->internal->client_CA), name_list); 451 } 452 453 STACK_OF(X509_NAME) * 454 SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) 455 { 456 return (ctx->internal->client_CA); 457 } 458 459 STACK_OF(X509_NAME) * 460 SSL_get_client_CA_list(const SSL *s) 461 { 462 if (!s->server) { 463 /* We are in the client. */ 464 if ((s->version >> 8) == SSL3_VERSION_MAJOR) 465 return (s->s3->hs.tls12.ca_names); 466 else 467 return (NULL); 468 } else { 469 if (s->internal->client_CA != NULL) 470 return (s->internal->client_CA); 471 else 472 return (s->ctx->internal->client_CA); 473 } 474 } 475 476 static int 477 add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x) 478 { 479 X509_NAME *name; 480 481 if (x == NULL) 482 return (0); 483 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL)) 484 return (0); 485 486 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) 487 return (0); 488 489 if (!sk_X509_NAME_push(*sk, name)) { 490 X509_NAME_free(name); 491 return (0); 492 } 493 return (1); 494 } 495 496 int 497 SSL_add_client_CA(SSL *ssl, X509 *x) 498 { 499 return (add_client_CA(&(ssl->internal->client_CA), x)); 500 } 501 502 int 503 SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) 504 { 505 return (add_client_CA(&(ctx->internal->client_CA), x)); 506 } 507 508 static int 509 xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 510 { 511 return (X509_NAME_cmp(*a, *b)); 512 } 513 514 /*! 515 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed; 516 * it doesn't really have anything to do with clients (except that a common use 517 * for a stack of CAs is to send it to the client). Actually, it doesn't have 518 * much to do with CAs, either, since it will load any old cert. 519 * \param file the file containing one or more certs. 520 * \return a ::STACK containing the certs. 521 */ 522 STACK_OF(X509_NAME) * 523 SSL_load_client_CA_file(const char *file) 524 { 525 BIO *in; 526 X509 *x = NULL; 527 X509_NAME *xn = NULL; 528 STACK_OF(X509_NAME) *ret = NULL, *sk; 529 530 sk = sk_X509_NAME_new(xname_cmp); 531 532 in = BIO_new(BIO_s_file()); 533 534 if ((sk == NULL) || (in == NULL)) { 535 SSLerrorx(ERR_R_MALLOC_FAILURE); 536 goto err; 537 } 538 539 if (!BIO_read_filename(in, file)) 540 goto err; 541 542 for (;;) { 543 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 544 break; 545 if (ret == NULL) { 546 ret = sk_X509_NAME_new_null(); 547 if (ret == NULL) { 548 SSLerrorx(ERR_R_MALLOC_FAILURE); 549 goto err; 550 } 551 } 552 if ((xn = X509_get_subject_name(x)) == NULL) 553 goto err; 554 /* check for duplicates */ 555 xn = X509_NAME_dup(xn); 556 if (xn == NULL) 557 goto err; 558 if (sk_X509_NAME_find(sk, xn) >= 0) 559 X509_NAME_free(xn); 560 else { 561 if (!sk_X509_NAME_push(sk, xn)) 562 goto err; 563 if (!sk_X509_NAME_push(ret, xn)) 564 goto err; 565 } 566 } 567 568 if (0) { 569 err: 570 sk_X509_NAME_pop_free(ret, X509_NAME_free); 571 ret = NULL; 572 } 573 sk_X509_NAME_free(sk); 574 BIO_free(in); 575 X509_free(x); 576 if (ret != NULL) 577 ERR_clear_error(); 578 579 return (ret); 580 } 581 582 /*! 583 * Add a file of certs to a stack. 584 * \param stack the stack to add to. 585 * \param file the file to add from. All certs in this file that are not 586 * already in the stack will be added. 587 * \return 1 for success, 0 for failure. Note that in the case of failure some 588 * certs may have been added to \c stack. 589 */ 590 591 int 592 SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 593 const char *file) 594 { 595 BIO *in; 596 X509 *x = NULL; 597 X509_NAME *xn = NULL; 598 int ret = 1; 599 int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b); 600 601 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp); 602 603 in = BIO_new(BIO_s_file()); 604 605 if (in == NULL) { 606 SSLerrorx(ERR_R_MALLOC_FAILURE); 607 goto err; 608 } 609 610 if (!BIO_read_filename(in, file)) 611 goto err; 612 613 for (;;) { 614 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 615 break; 616 if ((xn = X509_get_subject_name(x)) == NULL) 617 goto err; 618 xn = X509_NAME_dup(xn); 619 if (xn == NULL) 620 goto err; 621 if (sk_X509_NAME_find(stack, xn) >= 0) 622 X509_NAME_free(xn); 623 else 624 if (!sk_X509_NAME_push(stack, xn)) 625 goto err; 626 } 627 628 ERR_clear_error(); 629 630 if (0) { 631 err: 632 ret = 0; 633 } 634 BIO_free(in); 635 X509_free(x); 636 637 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 638 639 return ret; 640 } 641 642 /*! 643 * Add a directory of certs to a stack. 644 * \param stack the stack to append to. 645 * \param dir the directory to append from. All files in this directory will be 646 * examined as potential certs. Any that are acceptable to 647 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will 648 * be included. 649 * \return 1 for success, 0 for failure. Note that in the case of failure some 650 * certs may have been added to \c stack. 651 */ 652 653 int 654 SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir) 655 { 656 DIR *dirp = NULL; 657 char *path = NULL; 658 int ret = 0; 659 660 dirp = opendir(dir); 661 if (dirp) { 662 struct dirent *dp; 663 while ((dp = readdir(dirp)) != NULL) { 664 if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) { 665 ret = SSL_add_file_cert_subjects_to_stack( 666 stack, path); 667 free(path); 668 } 669 if (!ret) 670 break; 671 } 672 (void) closedir(dirp); 673 } 674 if (!ret) { 675 SYSerror(errno); 676 ERR_asprintf_error_data("opendir ('%s')", dir); 677 SSLerrorx(ERR_R_SYS_LIB); 678 } 679 return ret; 680 } 681