1 /* $OpenBSD: ssl_cert.c,v 1.67 2018/04/25 07:10:39 tb 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 static void 162 ssl_cert_set_default_md(CERT *cert) 163 { 164 /* Set digest values to defaults */ 165 cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1(); 166 cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1(); 167 cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1(); 168 #ifndef OPENSSL_NO_GOST 169 cert->pkeys[SSL_PKEY_GOST01].digest = EVP_gostr341194(); 170 #endif 171 } 172 173 CERT * 174 ssl_cert_new(void) 175 { 176 CERT *ret; 177 178 ret = calloc(1, sizeof(CERT)); 179 if (ret == NULL) { 180 SSLerrorx(ERR_R_MALLOC_FAILURE); 181 return (NULL); 182 } 183 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]); 184 ret->references = 1; 185 ssl_cert_set_default_md(ret); 186 return (ret); 187 } 188 189 CERT * 190 ssl_cert_dup(CERT *cert) 191 { 192 CERT *ret; 193 int i; 194 195 ret = calloc(1, sizeof(CERT)); 196 if (ret == NULL) { 197 SSLerrorx(ERR_R_MALLOC_FAILURE); 198 return (NULL); 199 } 200 201 /* 202 * same as ret->key = ret->pkeys + (cert->key - cert->pkeys), 203 * if you find that more readable 204 */ 205 ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]]; 206 207 ret->valid = cert->valid; 208 ret->mask_k = cert->mask_k; 209 ret->mask_a = cert->mask_a; 210 211 if (cert->dh_tmp != NULL) { 212 ret->dh_tmp = DHparams_dup(cert->dh_tmp); 213 if (ret->dh_tmp == NULL) { 214 SSLerrorx(ERR_R_DH_LIB); 215 goto err; 216 } 217 if (cert->dh_tmp->priv_key) { 218 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key); 219 if (!b) { 220 SSLerrorx(ERR_R_BN_LIB); 221 goto err; 222 } 223 ret->dh_tmp->priv_key = b; 224 } 225 if (cert->dh_tmp->pub_key) { 226 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key); 227 if (!b) { 228 SSLerrorx(ERR_R_BN_LIB); 229 goto err; 230 } 231 ret->dh_tmp->pub_key = b; 232 } 233 } 234 ret->dh_tmp_cb = cert->dh_tmp_cb; 235 ret->dh_tmp_auto = cert->dh_tmp_auto; 236 237 if (cert->ecdh_tmp) { 238 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp); 239 if (ret->ecdh_tmp == NULL) { 240 SSLerrorx(ERR_R_EC_LIB); 241 goto err; 242 } 243 } 244 245 for (i = 0; i < SSL_PKEY_NUM; i++) { 246 if (cert->pkeys[i].x509 != NULL) { 247 ret->pkeys[i].x509 = cert->pkeys[i].x509; 248 CRYPTO_add(&ret->pkeys[i].x509->references, 1, 249 CRYPTO_LOCK_X509); 250 } 251 252 if (cert->pkeys[i].privatekey != NULL) { 253 ret->pkeys[i].privatekey = cert->pkeys[i].privatekey; 254 CRYPTO_add(&ret->pkeys[i].privatekey->references, 1, 255 CRYPTO_LOCK_EVP_PKEY); 256 257 switch (i) { 258 /* 259 * If there was anything special to do for 260 * certain types of keys, we'd do it here. 261 * (Nothing at the moment, I think.) 262 */ 263 264 case SSL_PKEY_RSA_ENC: 265 case SSL_PKEY_RSA_SIGN: 266 /* We have an RSA key. */ 267 break; 268 269 case SSL_PKEY_DH_RSA: 270 /* We have a DH key. */ 271 break; 272 273 case SSL_PKEY_ECC: 274 /* We have an ECC key */ 275 break; 276 277 default: 278 /* Can't happen. */ 279 SSLerrorx(SSL_R_LIBRARY_BUG); 280 } 281 } 282 } 283 284 /* 285 * ret->extra_certs *should* exist, but currently the own certificate 286 * chain is held inside SSL_CTX 287 */ 288 289 ret->references = 1; 290 /* 291 * Set digests to defaults. NB: we don't copy existing values 292 * as they will be set during handshake. 293 */ 294 ssl_cert_set_default_md(ret); 295 296 return (ret); 297 298 err: 299 DH_free(ret->dh_tmp); 300 EC_KEY_free(ret->ecdh_tmp); 301 302 for (i = 0; i < SSL_PKEY_NUM; i++) { 303 X509_free(ret->pkeys[i].x509); 304 EVP_PKEY_free(ret->pkeys[i].privatekey); 305 } 306 free (ret); 307 return NULL; 308 } 309 310 311 void 312 ssl_cert_free(CERT *c) 313 { 314 int i; 315 316 if (c == NULL) 317 return; 318 319 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT); 320 if (i > 0) 321 return; 322 323 DH_free(c->dh_tmp); 324 EC_KEY_free(c->ecdh_tmp); 325 326 for (i = 0; i < SSL_PKEY_NUM; i++) { 327 X509_free(c->pkeys[i].x509); 328 EVP_PKEY_free(c->pkeys[i].privatekey); 329 } 330 331 free(c); 332 } 333 334 int 335 ssl_cert_inst(CERT **o) 336 { 337 /* 338 * Create a CERT if there isn't already one 339 * (which cannot really happen, as it is initially created in 340 * SSL_CTX_new; but the earlier code usually allows for that one 341 * being non-existant, so we follow that behaviour, as it might 342 * turn out that there actually is a reason for it -- but I'm 343 * not sure that *all* of the existing code could cope with 344 * s->cert being NULL, otherwise we could do without the 345 * initialization in SSL_CTX_new). 346 */ 347 348 if (o == NULL) { 349 SSLerrorx(ERR_R_PASSED_NULL_PARAMETER); 350 return (0); 351 } 352 if (*o == NULL) { 353 if ((*o = ssl_cert_new()) == NULL) { 354 SSLerrorx(ERR_R_MALLOC_FAILURE); 355 return (0); 356 } 357 } 358 return (1); 359 } 360 361 362 SESS_CERT * 363 ssl_sess_cert_new(void) 364 { 365 SESS_CERT *ret; 366 367 ret = calloc(1, sizeof *ret); 368 if (ret == NULL) { 369 SSLerrorx(ERR_R_MALLOC_FAILURE); 370 return NULL; 371 } 372 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]); 373 ret->references = 1; 374 375 return ret; 376 } 377 378 void 379 ssl_sess_cert_free(SESS_CERT *sc) 380 { 381 int i; 382 383 if (sc == NULL) 384 return; 385 386 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT); 387 if (i > 0) 388 return; 389 390 sk_X509_pop_free(sc->cert_chain, X509_free); 391 for (i = 0; i < SSL_PKEY_NUM; i++) 392 X509_free(sc->peer_pkeys[i].x509); 393 394 DH_free(sc->peer_dh_tmp); 395 EC_KEY_free(sc->peer_ecdh_tmp); 396 free(sc->peer_x25519_tmp); 397 398 free(sc); 399 } 400 401 int 402 ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) 403 { 404 X509_STORE_CTX ctx; 405 X509 *x; 406 int ret; 407 408 if ((sk == NULL) || (sk_X509_num(sk) == 0)) 409 return (0); 410 411 x = sk_X509_value(sk, 0); 412 if (!X509_STORE_CTX_init(&ctx, s->ctx->cert_store, x, sk)) { 413 SSLerror(s, ERR_R_X509_LIB); 414 return (0); 415 } 416 X509_STORE_CTX_set_ex_data(&ctx, 417 SSL_get_ex_data_X509_STORE_CTX_idx(), s); 418 419 /* 420 * We need to inherit the verify parameters. These can be 421 * determined by the context: if its a server it will verify 422 * SSL client certificates or vice versa. 423 */ 424 X509_STORE_CTX_set_default(&ctx, 425 s->server ? "ssl_client" : "ssl_server"); 426 427 /* 428 * Anything non-default in "param" should overwrite anything 429 * in the ctx. 430 */ 431 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param); 432 433 if (s->internal->verify_callback) 434 X509_STORE_CTX_set_verify_cb(&ctx, s->internal->verify_callback); 435 436 if (s->ctx->internal->app_verify_callback != NULL) 437 ret = s->ctx->internal->app_verify_callback(&ctx, 438 s->ctx->internal->app_verify_arg); 439 else 440 ret = X509_verify_cert(&ctx); 441 442 s->verify_result = ctx.error; 443 X509_STORE_CTX_cleanup(&ctx); 444 445 return (ret); 446 } 447 448 static void 449 set_client_CA_list(STACK_OF(X509_NAME) **ca_list, 450 STACK_OF(X509_NAME) *name_list) 451 { 452 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); 453 *ca_list = name_list; 454 } 455 456 STACK_OF(X509_NAME) * 457 SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) 458 { 459 int i; 460 STACK_OF(X509_NAME) *ret; 461 X509_NAME *name; 462 463 ret = sk_X509_NAME_new_null(); 464 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 465 name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); 466 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) { 467 sk_X509_NAME_pop_free(ret, X509_NAME_free); 468 return (NULL); 469 } 470 } 471 return (ret); 472 } 473 474 void 475 SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) 476 { 477 set_client_CA_list(&(s->internal->client_CA), name_list); 478 } 479 480 void 481 SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) 482 { 483 set_client_CA_list(&(ctx->internal->client_CA), name_list); 484 } 485 486 STACK_OF(X509_NAME) * 487 SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) 488 { 489 return (ctx->internal->client_CA); 490 } 491 492 STACK_OF(X509_NAME) * 493 SSL_get_client_CA_list(const SSL *s) 494 { 495 if (s->internal->type == SSL_ST_CONNECT) { 496 /* We are in the client. */ 497 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && 498 (s->s3 != NULL)) 499 return (S3I(s)->tmp.ca_names); 500 else 501 return (NULL); 502 } else { 503 if (s->internal->client_CA != NULL) 504 return (s->internal->client_CA); 505 else 506 return (s->ctx->internal->client_CA); 507 } 508 } 509 510 static int 511 add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x) 512 { 513 X509_NAME *name; 514 515 if (x == NULL) 516 return (0); 517 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL)) 518 return (0); 519 520 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) 521 return (0); 522 523 if (!sk_X509_NAME_push(*sk, name)) { 524 X509_NAME_free(name); 525 return (0); 526 } 527 return (1); 528 } 529 530 int 531 SSL_add_client_CA(SSL *ssl, X509 *x) 532 { 533 return (add_client_CA(&(ssl->internal->client_CA), x)); 534 } 535 536 int 537 SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) 538 { 539 return (add_client_CA(&(ctx->internal->client_CA), x)); 540 } 541 542 static int 543 xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 544 { 545 return (X509_NAME_cmp(*a, *b)); 546 } 547 548 /*! 549 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed; 550 * it doesn't really have anything to do with clients (except that a common use 551 * for a stack of CAs is to send it to the client). Actually, it doesn't have 552 * much to do with CAs, either, since it will load any old cert. 553 * \param file the file containing one or more certs. 554 * \return a ::STACK containing the certs. 555 */ 556 STACK_OF(X509_NAME) * 557 SSL_load_client_CA_file(const char *file) 558 { 559 BIO *in; 560 X509 *x = NULL; 561 X509_NAME *xn = NULL; 562 STACK_OF(X509_NAME) *ret = NULL, *sk; 563 564 sk = sk_X509_NAME_new(xname_cmp); 565 566 in = BIO_new(BIO_s_file_internal()); 567 568 if ((sk == NULL) || (in == NULL)) { 569 SSLerrorx(ERR_R_MALLOC_FAILURE); 570 goto err; 571 } 572 573 if (!BIO_read_filename(in, file)) 574 goto err; 575 576 for (;;) { 577 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 578 break; 579 if (ret == NULL) { 580 ret = sk_X509_NAME_new_null(); 581 if (ret == NULL) { 582 SSLerrorx(ERR_R_MALLOC_FAILURE); 583 goto err; 584 } 585 } 586 if ((xn = X509_get_subject_name(x)) == NULL) goto err; 587 /* check for duplicates */ 588 xn = X509_NAME_dup(xn); 589 if (xn == NULL) 590 goto err; 591 if (sk_X509_NAME_find(sk, xn) >= 0) 592 X509_NAME_free(xn); 593 else { 594 sk_X509_NAME_push(sk, xn); 595 sk_X509_NAME_push(ret, xn); 596 } 597 } 598 599 if (0) { 600 err: 601 sk_X509_NAME_pop_free(ret, X509_NAME_free); 602 ret = NULL; 603 } 604 sk_X509_NAME_free(sk); 605 BIO_free(in); 606 X509_free(x); 607 if (ret != NULL) 608 ERR_clear_error(); 609 610 return (ret); 611 } 612 613 /*! 614 * Add a file of certs to a stack. 615 * \param stack the stack to add to. 616 * \param file the file to add from. All certs in this file that are not 617 * already in the stack will be added. 618 * \return 1 for success, 0 for failure. Note that in the case of failure some 619 * certs may have been added to \c stack. 620 */ 621 622 int 623 SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 624 const char *file) 625 { 626 BIO *in; 627 X509 *x = NULL; 628 X509_NAME *xn = NULL; 629 int ret = 1; 630 int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b); 631 632 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp); 633 634 in = BIO_new(BIO_s_file_internal()); 635 636 if (in == NULL) { 637 SSLerrorx(ERR_R_MALLOC_FAILURE); 638 goto err; 639 } 640 641 if (!BIO_read_filename(in, file)) 642 goto err; 643 644 for (;;) { 645 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) 646 break; 647 if ((xn = X509_get_subject_name(x)) == NULL) goto err; 648 xn = X509_NAME_dup(xn); 649 if (xn == NULL) 650 goto err; 651 if (sk_X509_NAME_find(stack, xn) >= 0) 652 X509_NAME_free(xn); 653 else 654 sk_X509_NAME_push(stack, xn); 655 } 656 657 ERR_clear_error(); 658 659 if (0) { 660 err: 661 ret = 0; 662 } 663 BIO_free(in); 664 X509_free(x); 665 666 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); 667 668 return ret; 669 } 670 671 /*! 672 * Add a directory of certs to a stack. 673 * \param stack the stack to append to. 674 * \param dir the directory to append from. All files in this directory will be 675 * examined as potential certs. Any that are acceptable to 676 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will 677 * be included. 678 * \return 1 for success, 0 for failure. Note that in the case of failure some 679 * certs may have been added to \c stack. 680 */ 681 682 int 683 SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir) 684 { 685 DIR *dirp = NULL; 686 char *path = NULL; 687 int ret = 0; 688 689 dirp = opendir(dir); 690 if (dirp) { 691 struct dirent *dp; 692 while ((dp = readdir(dirp)) != NULL) { 693 if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) { 694 ret = SSL_add_file_cert_subjects_to_stack( 695 stack, path); 696 free(path); 697 } 698 if (!ret) 699 break; 700 } 701 (void) closedir(dirp); 702 } 703 if (!ret) { 704 SYSerror(errno); 705 ERR_asprintf_error_data("opendir ('%s')", dir); 706 SSLerrorx(ERR_R_SYS_LIB); 707 } 708 return ret; 709 } 710