1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] 56 */ 57 /* ==================================================================== 58 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 59 * 60 * Redistribution and use in source and binary forms, with or without 61 * modification, are permitted provided that the following conditions 62 * are met: 63 * 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in 69 * the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3. All advertising materials mentioning features or use of this 73 * software must display the following acknowledgment: 74 * "This product includes software developed by the OpenSSL Project 75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 76 * 77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 78 * endorse or promote products derived from this software without 79 * prior written permission. For written permission, please contact 80 * openssl-core (at) openssl.org. 81 * 82 * 5. Products derived from this software may not be called "OpenSSL" 83 * nor may "OpenSSL" appear in their names without prior written 84 * permission of the OpenSSL Project. 85 * 86 * 6. Redistributions of any form whatsoever must retain the following 87 * acknowledgment: 88 * "This product includes software developed by the OpenSSL Project 89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 102 * OF THE POSSIBILITY OF SUCH DAMAGE. 103 * ==================================================================== 104 * 105 * This product includes cryptographic software written by Eric Young 106 * (eay (at) cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh (at) cryptsoft.com). 108 * 109 */ 110 /* ==================================================================== 111 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 112 * ECC cipher suite support in OpenSSL originally developed by 113 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ 114 115 #include <errno.h> 116 #include <stdio.h> 117 #include <string.h> 118 119 #include <openssl/bio.h> 120 #include <openssl/bn.h> 121 #include <openssl/buf.h> 122 #include <openssl/dh.h> 123 #include <openssl/err.h> 124 #include <openssl/mem.h> 125 #include <openssl/obj.h> 126 #include <openssl/pem.h> 127 #include <openssl/x509v3.h> 128 129 #include "../crypto/dh/internal.h" 130 #include "../crypto/directory.h" 131 #include "../crypto/internal.h" 132 #include "internal.h" 133 134 135 static CRYPTO_once_t g_x509_store_ex_data_index_once; 136 static int g_x509_store_ex_data_index; 137 138 static void ssl_x509_store_ex_data_index_init(void) { 139 g_x509_store_ex_data_index = X509_STORE_CTX_get_ex_new_index( 140 0, "SSL for verify callback", NULL, NULL, NULL); 141 } 142 143 int SSL_get_ex_data_X509_STORE_CTX_idx(void) { 144 CRYPTO_once(&g_x509_store_ex_data_index_once, 145 ssl_x509_store_ex_data_index_init); 146 return g_x509_store_ex_data_index; 147 } 148 149 CERT *ssl_cert_new(void) { 150 CERT *ret; 151 152 ret = (CERT *)OPENSSL_malloc(sizeof(CERT)); 153 if (ret == NULL) { 154 OPENSSL_PUT_ERROR(SSL, ssl_cert_new, ERR_R_MALLOC_FAILURE); 155 return NULL; 156 } 157 memset(ret, 0, sizeof(CERT)); 158 159 ret->key = &ret->pkeys[SSL_PKEY_RSA_ENC]; 160 return ret; 161 } 162 163 CERT *ssl_cert_dup(CERT *cert) { 164 CERT *ret; 165 int i; 166 167 ret = (CERT *)OPENSSL_malloc(sizeof(CERT)); 168 if (ret == NULL) { 169 OPENSSL_PUT_ERROR(SSL, ssl_cert_dup, ERR_R_MALLOC_FAILURE); 170 return NULL; 171 } 172 memset(ret, 0, sizeof(CERT)); 173 174 ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]]; 175 /* or ret->key = ret->pkeys + (cert->key - cert->pkeys), if you find that 176 * more readable */ 177 178 ret->mask_k = cert->mask_k; 179 ret->mask_a = cert->mask_a; 180 181 if (cert->dh_tmp != NULL) { 182 ret->dh_tmp = DHparams_dup(cert->dh_tmp); 183 if (ret->dh_tmp == NULL) { 184 OPENSSL_PUT_ERROR(SSL, ssl_cert_dup, ERR_R_DH_LIB); 185 goto err; 186 } 187 if (cert->dh_tmp->priv_key) { 188 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key); 189 if (!b) { 190 OPENSSL_PUT_ERROR(SSL, ssl_cert_dup, ERR_R_BN_LIB); 191 goto err; 192 } 193 ret->dh_tmp->priv_key = b; 194 } 195 if (cert->dh_tmp->pub_key) { 196 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key); 197 if (!b) { 198 OPENSSL_PUT_ERROR(SSL, ssl_cert_dup, ERR_R_BN_LIB); 199 goto err; 200 } 201 ret->dh_tmp->pub_key = b; 202 } 203 } 204 ret->dh_tmp_cb = cert->dh_tmp_cb; 205 206 ret->ecdh_nid = cert->ecdh_nid; 207 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb; 208 209 for (i = 0; i < SSL_PKEY_NUM; i++) { 210 CERT_PKEY *cpk = cert->pkeys + i; 211 CERT_PKEY *rpk = ret->pkeys + i; 212 if (cpk->x509 != NULL) { 213 rpk->x509 = X509_up_ref(cpk->x509); 214 } 215 216 if (cpk->privatekey != NULL) { 217 rpk->privatekey = EVP_PKEY_up_ref(cpk->privatekey); 218 } 219 220 if (cpk->chain) { 221 rpk->chain = X509_chain_up_ref(cpk->chain); 222 if (!rpk->chain) { 223 OPENSSL_PUT_ERROR(SSL, ssl_cert_dup, ERR_R_MALLOC_FAILURE); 224 goto err; 225 } 226 } 227 } 228 229 /* Copy over signature algorithm configuration. */ 230 if (cert->conf_sigalgs) { 231 ret->conf_sigalgs = BUF_memdup(cert->conf_sigalgs, cert->conf_sigalgslen); 232 if (!ret->conf_sigalgs) { 233 goto err; 234 } 235 ret->conf_sigalgslen = cert->conf_sigalgslen; 236 } 237 238 if (cert->client_sigalgs) { 239 ret->client_sigalgs = BUF_memdup(cert->client_sigalgs, 240 cert->client_sigalgslen); 241 if (!ret->client_sigalgs) { 242 goto err; 243 } 244 ret->client_sigalgslen = cert->client_sigalgslen; 245 } 246 247 /* Copy any custom client certificate types */ 248 if (cert->client_certificate_types) { 249 ret->client_certificate_types = BUF_memdup( 250 cert->client_certificate_types, cert->num_client_certificate_types); 251 if (!ret->client_certificate_types) { 252 goto err; 253 } 254 ret->num_client_certificate_types = cert->num_client_certificate_types; 255 } 256 257 ret->cert_cb = cert->cert_cb; 258 ret->cert_cb_arg = cert->cert_cb_arg; 259 260 if (cert->verify_store) { 261 CRYPTO_refcount_inc(&cert->verify_store->references); 262 ret->verify_store = cert->verify_store; 263 } 264 265 if (cert->chain_store) { 266 CRYPTO_refcount_inc(&cert->chain_store->references); 267 ret->chain_store = cert->chain_store; 268 } 269 270 return ret; 271 272 err: 273 ssl_cert_free(ret); 274 return NULL; 275 } 276 277 /* Free up and clear all certificates and chains */ 278 void ssl_cert_clear_certs(CERT *c) { 279 int i; 280 if (c == NULL) { 281 return; 282 } 283 284 for (i = 0; i < SSL_PKEY_NUM; i++) { 285 CERT_PKEY *cpk = c->pkeys + i; 286 if (cpk->x509) { 287 X509_free(cpk->x509); 288 cpk->x509 = NULL; 289 } 290 if (cpk->privatekey) { 291 EVP_PKEY_free(cpk->privatekey); 292 cpk->privatekey = NULL; 293 } 294 if (cpk->chain) { 295 sk_X509_pop_free(cpk->chain, X509_free); 296 cpk->chain = NULL; 297 } 298 } 299 } 300 301 void ssl_cert_free(CERT *c) { 302 if (c == NULL) { 303 return; 304 } 305 306 DH_free(c->dh_tmp); 307 308 ssl_cert_clear_certs(c); 309 OPENSSL_free(c->peer_sigalgs); 310 OPENSSL_free(c->conf_sigalgs); 311 OPENSSL_free(c->client_sigalgs); 312 OPENSSL_free(c->shared_sigalgs); 313 OPENSSL_free(c->client_certificate_types); 314 X509_STORE_free(c->verify_store); 315 X509_STORE_free(c->chain_store); 316 317 OPENSSL_free(c); 318 } 319 320 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain) { 321 CERT_PKEY *cpk = c->key; 322 if (!cpk) { 323 return 0; 324 } 325 sk_X509_pop_free(cpk->chain, X509_free); 326 cpk->chain = chain; 327 return 1; 328 } 329 330 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain) { 331 STACK_OF(X509) *dchain; 332 if (!chain) { 333 return ssl_cert_set0_chain(c, NULL); 334 } 335 336 dchain = X509_chain_up_ref(chain); 337 if (!dchain) { 338 return 0; 339 } 340 341 if (!ssl_cert_set0_chain(c, dchain)) { 342 sk_X509_pop_free(dchain, X509_free); 343 return 0; 344 } 345 346 return 1; 347 } 348 349 int ssl_cert_add0_chain_cert(CERT *c, X509 *x) { 350 CERT_PKEY *cpk = c->key; 351 if (!cpk) { 352 return 0; 353 } 354 355 if (!cpk->chain) { 356 cpk->chain = sk_X509_new_null(); 357 } 358 if (!cpk->chain || !sk_X509_push(cpk->chain, x)) { 359 return 0; 360 } 361 362 return 1; 363 } 364 365 int ssl_cert_add1_chain_cert(CERT *c, X509 *x) { 366 if (!ssl_cert_add0_chain_cert(c, x)) { 367 return 0; 368 } 369 370 X509_up_ref(x); 371 return 1; 372 } 373 374 int ssl_cert_select_current(CERT *c, X509 *x) { 375 int i; 376 if (x == NULL) { 377 return 0; 378 } 379 380 for (i = 0; i < SSL_PKEY_NUM; i++) { 381 if (c->pkeys[i].x509 == x) { 382 c->key = &c->pkeys[i]; 383 return 1; 384 } 385 } 386 387 for (i = 0; i < SSL_PKEY_NUM; i++) { 388 if (c->pkeys[i].x509 && !X509_cmp(c->pkeys[i].x509, x)) { 389 c->key = &c->pkeys[i]; 390 return 1; 391 } 392 } 393 394 return 0; 395 } 396 397 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg) { 398 c->cert_cb = cb; 399 c->cert_cb_arg = arg; 400 } 401 402 SESS_CERT *ssl_sess_cert_new(void) { 403 SESS_CERT *ret; 404 405 ret = OPENSSL_malloc(sizeof *ret); 406 if (ret == NULL) { 407 OPENSSL_PUT_ERROR(SSL, ssl_sess_cert_new, ERR_R_MALLOC_FAILURE); 408 return NULL; 409 } 410 411 memset(ret, 0, sizeof *ret); 412 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]); 413 414 return ret; 415 } 416 417 void ssl_sess_cert_free(SESS_CERT *sc) { 418 int i; 419 420 if (sc == NULL) { 421 return; 422 } 423 424 sk_X509_pop_free(sc->cert_chain, X509_free); 425 426 for (i = 0; i < SSL_PKEY_NUM; i++) { 427 X509_free(sc->peer_pkeys[i].x509); 428 } 429 430 DH_free(sc->peer_dh_tmp); 431 EC_KEY_free(sc->peer_ecdh_tmp); 432 433 OPENSSL_free(sc); 434 } 435 436 int ssl_set_peer_cert_type(SESS_CERT *sc, int type) { 437 sc->peer_cert_type = type; 438 return 1; 439 } 440 441 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) { 442 X509 *x; 443 int i; 444 X509_STORE *verify_store; 445 X509_STORE_CTX ctx; 446 447 if (s->cert->verify_store) { 448 verify_store = s->cert->verify_store; 449 } else { 450 verify_store = s->ctx->cert_store; 451 } 452 453 if (sk == NULL || sk_X509_num(sk) == 0) { 454 return 0; 455 } 456 457 x = sk_X509_value(sk, 0); 458 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) { 459 OPENSSL_PUT_ERROR(SSL, ssl_verify_cert_chain, ERR_R_X509_LIB); 460 return 0; 461 } 462 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s); 463 464 /* We need to inherit the verify parameters. These can be determined by the 465 * context: if its a server it will verify SSL client certificates or vice 466 * versa. */ 467 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server"); 468 469 /* Anything non-default in "param" should overwrite anything in the ctx. */ 470 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param); 471 472 if (s->verify_callback) { 473 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback); 474 } 475 476 if (s->ctx->app_verify_callback != NULL) { 477 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 478 } else { 479 i = X509_verify_cert(&ctx); 480 } 481 482 s->verify_result = ctx.error; 483 X509_STORE_CTX_cleanup(&ctx); 484 485 return i; 486 } 487 488 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list, 489 STACK_OF(X509_NAME) *name_list) { 490 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); 491 *ca_list = name_list; 492 } 493 494 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk) { 495 size_t i; 496 STACK_OF(X509_NAME) *ret; 497 X509_NAME *name; 498 499 ret = sk_X509_NAME_new_null(); 500 for (i = 0; i < sk_X509_NAME_num(sk); i++) { 501 name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); 502 if (name == NULL || !sk_X509_NAME_push(ret, name)) { 503 sk_X509_NAME_pop_free(ret, X509_NAME_free); 504 return NULL; 505 } 506 } 507 508 return ret; 509 } 510 511 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) { 512 set_client_CA_list(&(s->client_CA), name_list); 513 } 514 515 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) { 516 set_client_CA_list(&(ctx->client_CA), name_list); 517 } 518 519 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) { 520 return ctx->client_CA; 521 } 522 523 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s) { 524 if (s->server) { 525 if (s->client_CA != NULL) { 526 return s->client_CA; 527 } else { 528 return s->ctx->client_CA; 529 } 530 } else { 531 if ((s->version >> 8) == SSL3_VERSION_MAJOR && s->s3 != NULL) { 532 return s->s3->tmp.ca_names; 533 } else { 534 return NULL; 535 } 536 } 537 } 538 539 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x) { 540 X509_NAME *name; 541 542 if (x == NULL) { 543 return 0; 544 } 545 if (*sk == NULL) { 546 *sk = sk_X509_NAME_new_null(); 547 if (*sk == NULL) { 548 return 0; 549 } 550 } 551 552 name = X509_NAME_dup(X509_get_subject_name(x)); 553 if (name == NULL) { 554 return 0; 555 } 556 557 if (!sk_X509_NAME_push(*sk, name)) { 558 X509_NAME_free(name); 559 return 0; 560 } 561 562 return 1; 563 } 564 565 int SSL_add_client_CA(SSL *ssl, X509 *x) { 566 return add_client_CA(&(ssl->client_CA), x); 567 } 568 569 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) { 570 return add_client_CA(&(ctx->client_CA), x); 571 } 572 573 static int xname_cmp(const X509_NAME **a, const X509_NAME **b) { 574 return X509_NAME_cmp(*a, *b); 575 } 576 577 /* Load CA certs from a file into a STACK. Note that it is somewhat misnamed; 578 * it doesn't really have anything to do with clients (except that a common use 579 * for a stack of CAs is to send it to the client). Actually, it doesn't have 580 * much to do with CAs, either, since it will load any old cert. 581 * 582 * \param file the file containing one or more certs. 583 * \return a ::STACK containing the certs. */ 584 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file) { 585 BIO *in; 586 X509 *x = NULL; 587 X509_NAME *xn = NULL; 588 STACK_OF(X509_NAME) *ret = NULL, *sk; 589 590 sk = sk_X509_NAME_new(xname_cmp); 591 in = BIO_new(BIO_s_file()); 592 593 if (sk == NULL || in == NULL) { 594 OPENSSL_PUT_ERROR(SSL, SSL_load_client_CA_file, ERR_R_MALLOC_FAILURE); 595 goto err; 596 } 597 598 if (!BIO_read_filename(in, file)) { 599 goto err; 600 } 601 602 for (;;) { 603 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) { 604 break; 605 } 606 if (ret == NULL) { 607 ret = sk_X509_NAME_new_null(); 608 if (ret == NULL) { 609 OPENSSL_PUT_ERROR(SSL, SSL_load_client_CA_file, ERR_R_MALLOC_FAILURE); 610 goto err; 611 } 612 } 613 xn = X509_get_subject_name(x); 614 if (xn == NULL) { 615 goto err; 616 } 617 618 /* check for duplicates */ 619 xn = X509_NAME_dup(xn); 620 if (xn == NULL) { 621 goto err; 622 } 623 if (sk_X509_NAME_find(sk, NULL, xn)) { 624 X509_NAME_free(xn); 625 } else { 626 sk_X509_NAME_push(sk, xn); 627 sk_X509_NAME_push(ret, xn); 628 } 629 } 630 631 if (0) { 632 err: 633 sk_X509_NAME_pop_free(ret, X509_NAME_free); 634 ret = NULL; 635 } 636 637 sk_X509_NAME_free(sk); 638 BIO_free(in); 639 X509_free(x); 640 if (ret != NULL) { 641 ERR_clear_error(); 642 } 643 return ret; 644 } 645 646 /* Add a file of certs to a stack. 647 * 648 * \param stack the stack to add to. 649 * \param file the file to add from. All certs in this file that are not 650 * already in the stack will be added. 651 * \return 1 for success, 0 for failure. Note that in the case of failure some 652 * certs may have been added to \c stack. */ 653 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 654 const char *file) { 655 BIO *in; 656 X509 *x = NULL; 657 X509_NAME *xn = NULL; 658 int ret = 1; 659 int (*oldcmp)(const X509_NAME **a, const X509_NAME **b); 660 661 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp); 662 in = BIO_new(BIO_s_file()); 663 664 if (in == NULL) { 665 OPENSSL_PUT_ERROR(SSL, SSL_add_file_cert_subjects_to_stack, 666 ERR_R_MALLOC_FAILURE); 667 goto err; 668 } 669 670 if (!BIO_read_filename(in, file)) { 671 goto err; 672 } 673 674 for (;;) { 675 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) { 676 break; 677 } 678 xn = X509_get_subject_name(x); 679 if (xn == NULL) { 680 goto err; 681 } 682 xn = X509_NAME_dup(xn); 683 if (xn == NULL) { 684 goto err; 685 } 686 if (sk_X509_NAME_find(stack, NULL, xn)) { 687 X509_NAME_free(xn); 688 } else { 689 sk_X509_NAME_push(stack, xn); 690 } 691 } 692 693 ERR_clear_error(); 694 695 if (0) { 696 err: 697 ret = 0; 698 } 699 700 BIO_free(in); 701 X509_free(x); 702 703 (void) sk_X509_NAME_set_cmp_func(stack, oldcmp); 704 705 return ret; 706 } 707 708 /* Add a directory of certs to a stack. 709 * 710 * \param stack the stack to append to. 711 * \param dir the directory to append from. All files in this directory will be 712 * examined as potential certs. Any that are acceptable to 713 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will 714 * be included. 715 * \return 1 for success, 0 for failure. Note that in the case of failure some 716 * certs may have been added to \c stack. */ 717 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, 718 const char *dir) { 719 OPENSSL_DIR_CTX *d = NULL; 720 const char *filename; 721 int ret = 0; 722 723 /* Note that a side effect is that the CAs will be sorted by name */ 724 while ((filename = OPENSSL_DIR_read(&d, dir))) { 725 char buf[1024]; 726 int r; 727 728 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) { 729 OPENSSL_PUT_ERROR(SSL, SSL_add_dir_cert_subjects_to_stack, 730 SSL_R_PATH_TOO_LONG); 731 goto err; 732 } 733 734 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename); 735 if (r <= 0 || r >= (int)sizeof(buf) || 736 !SSL_add_file_cert_subjects_to_stack(stack, buf)) { 737 goto err; 738 } 739 } 740 741 if (errno) { 742 OPENSSL_PUT_ERROR(SSL, SSL_add_dir_cert_subjects_to_stack, ERR_R_SYS_LIB); 743 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')"); 744 goto err; 745 } 746 747 ret = 1; 748 749 err: 750 if (d) { 751 OPENSSL_DIR_end(&d); 752 } 753 return ret; 754 } 755 756 /* Add a certificate to a BUF_MEM structure */ 757 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) { 758 int n; 759 uint8_t *p; 760 761 n = i2d_X509(x, NULL); 762 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) { 763 OPENSSL_PUT_ERROR(SSL, ssl_add_cert_to_buf, ERR_R_BUF_LIB); 764 return 0; 765 } 766 p = (uint8_t *)&(buf->data[*l]); 767 l2n3(n, p); 768 i2d_X509(x, &p); 769 *l += n + 3; 770 771 return 1; 772 } 773 774 /* Add certificate chain to internal SSL BUF_MEM structure. */ 775 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l) { 776 BUF_MEM *buf = s->init_buf; 777 int no_chain = 0; 778 size_t i; 779 780 X509 *x = cpk->x509; 781 STACK_OF(X509) *extra_certs; 782 X509_STORE *chain_store; 783 784 if (x == NULL) { 785 OPENSSL_PUT_ERROR(SSL, ssl_add_cert_chain, SSL_R_NO_CERTIFICATE_SET); 786 return 0; 787 } 788 789 if (s->cert->chain_store) { 790 chain_store = s->cert->chain_store; 791 } else { 792 chain_store = s->ctx->cert_store; 793 } 794 795 /* If we have a certificate specific chain use it, else use parent ctx. */ 796 if (cpk && cpk->chain) { 797 extra_certs = cpk->chain; 798 } else { 799 extra_certs = s->ctx->extra_certs; 800 } 801 802 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs) { 803 no_chain = 1; 804 } 805 806 if (no_chain) { 807 if (!ssl_add_cert_to_buf(buf, l, x)) { 808 return 0; 809 } 810 811 for (i = 0; i < sk_X509_num(extra_certs); i++) { 812 x = sk_X509_value(extra_certs, i); 813 if (!ssl_add_cert_to_buf(buf, l, x)) { 814 return 0; 815 } 816 } 817 } else { 818 X509_STORE_CTX xs_ctx; 819 820 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) { 821 OPENSSL_PUT_ERROR(SSL, ssl_add_cert_chain, ERR_R_X509_LIB); 822 return 0; 823 } 824 X509_verify_cert(&xs_ctx); 825 /* Don't leave errors in the queue */ 826 ERR_clear_error(); 827 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) { 828 x = sk_X509_value(xs_ctx.chain, i); 829 830 if (!ssl_add_cert_to_buf(buf, l, x)) { 831 X509_STORE_CTX_cleanup(&xs_ctx); 832 return 0; 833 } 834 } 835 X509_STORE_CTX_cleanup(&xs_ctx); 836 } 837 838 return 1; 839 } 840 841 /* Build a certificate chain for current certificate */ 842 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags) { 843 CERT_PKEY *cpk = c->key; 844 X509_STORE_CTX xs_ctx; 845 STACK_OF(X509) *chain = NULL, *untrusted = NULL; 846 X509 *x; 847 int i, rv = 0; 848 uint32_t error; 849 850 if (!cpk->x509) { 851 OPENSSL_PUT_ERROR(SSL, ssl_build_cert_chain, SSL_R_NO_CERTIFICATE_SET); 852 goto err; 853 } 854 855 /* Rearranging and check the chain: add everything to a store */ 856 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { 857 size_t j; 858 chain_store = X509_STORE_new(); 859 if (!chain_store) { 860 goto err; 861 } 862 863 for (j = 0; j < sk_X509_num(cpk->chain); j++) { 864 x = sk_X509_value(cpk->chain, j); 865 if (!X509_STORE_add_cert(chain_store, x)) { 866 error = ERR_peek_last_error(); 867 if (ERR_GET_LIB(error) != ERR_LIB_X509 || 868 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE) { 869 goto err; 870 } 871 ERR_clear_error(); 872 } 873 } 874 875 /* Add EE cert too: it might be self signed */ 876 if (!X509_STORE_add_cert(chain_store, cpk->x509)) { 877 error = ERR_peek_last_error(); 878 if (ERR_GET_LIB(error) != ERR_LIB_X509 || 879 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE) { 880 goto err; 881 } 882 ERR_clear_error(); 883 } 884 } else { 885 if (c->chain_store) { 886 chain_store = c->chain_store; 887 } 888 889 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED) { 890 untrusted = cpk->chain; 891 } 892 } 893 894 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) { 895 OPENSSL_PUT_ERROR(SSL, ssl_build_cert_chain, ERR_R_X509_LIB); 896 goto err; 897 } 898 899 i = X509_verify_cert(&xs_ctx); 900 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) { 901 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR) { 902 ERR_clear_error(); 903 } 904 i = 1; 905 rv = 2; 906 } 907 908 if (i > 0) { 909 chain = X509_STORE_CTX_get1_chain(&xs_ctx); 910 } 911 if (i <= 0) { 912 OPENSSL_PUT_ERROR(SSL, ssl_build_cert_chain, 913 SSL_R_CERTIFICATE_VERIFY_FAILED); 914 i = X509_STORE_CTX_get_error(&xs_ctx); 915 ERR_add_error_data(2, "Verify error:", X509_verify_cert_error_string(i)); 916 917 X509_STORE_CTX_cleanup(&xs_ctx); 918 goto err; 919 } 920 921 X509_STORE_CTX_cleanup(&xs_ctx); 922 if (cpk->chain) { 923 sk_X509_pop_free(cpk->chain, X509_free); 924 } 925 926 /* Remove EE certificate from chain */ 927 x = sk_X509_shift(chain); 928 X509_free(x); 929 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) { 930 if (sk_X509_num(chain) > 0) { 931 /* See if last cert is self signed */ 932 x = sk_X509_value(chain, sk_X509_num(chain) - 1); 933 X509_check_purpose(x, -1, 0); 934 if (x->ex_flags & EXFLAG_SS) { 935 x = sk_X509_pop(chain); 936 X509_free(x); 937 } 938 } 939 } 940 941 cpk->chain = chain; 942 if (rv == 0) { 943 rv = 1; 944 } 945 946 err: 947 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) { 948 X509_STORE_free(chain_store); 949 } 950 951 return rv; 952 } 953 954 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref) { 955 X509_STORE **pstore; 956 if (chain) { 957 pstore = &c->chain_store; 958 } else { 959 pstore = &c->verify_store; 960 } 961 962 X509_STORE_free(*pstore); 963 *pstore = store; 964 965 if (ref && store) { 966 CRYPTO_refcount_inc(&store->references); 967 } 968 return 1; 969 } 970
