ssl/ssl_cert.c

   1 /*! \file ssl/ssl_cert.c */
   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 <stdio.h>
 118
 119 #include "e_os.h"
 120 #ifndef NO_SYS_TYPES_H
 121 # include <sys/types.h>
 122 #endif
 123
 124 #include "o_dir.h"
 125 #include <openssl/objects.h>
 126 #include <openssl/bio.h>
 127 #include <openssl/pem.h>
 128 #include <openssl/x509v3.h>
 129 #ifndef OPENSSL_NO_DH
 130 #include <openssl/dh.h>
 131 #endif
 132 #include <openssl/bn.h>
 133 #include "ssl_locl.h"
 134
 135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
 136     {
 137     static volatile int ssl_x509_store_ctx_idx= -1;
 138     int got_write_lock = 0;
 139
 140     if (((size_t)&ssl_x509_store_ctx_idx&(sizeof(ssl_x509_store_ctx_idx)-1))
 141                 ==0)    /* check alignment, practically always true */
 142         {
 143         int ret;
 144
 145         if ((ret=ssl_x509_store_ctx_idx) < 0)
 146                 {
 147                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 148                 if ((ret=ssl_x509_store_ctx_idx) < 0)
 149                         {
 150                         ret=ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 151                                 0,"SSL for verify callback",NULL,NULL,NULL);
 152                         }
 153                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 154                 }
 155
 156         return ret;
 157         }
 158     else                /* commonly eliminated */
 159         {
 160         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 161
 162         if (ssl_x509_store_ctx_idx < 0)
 163                 {
 164                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 165                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 166                 got_write_lock = 1;
 167
 168                 if (ssl_x509_store_ctx_idx < 0)
 169                         {
 170                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 171                                 0,"SSL for verify callback",NULL,NULL,NULL);
 172                         }
 173                 }
 174
 175         if (got_write_lock)
 176                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 177         else
 178                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 179
 180         return ssl_x509_store_ctx_idx;
 181         }
 182     }
 183
 184 void ssl_cert_set_default_md(CERT *cert)
 185         {
 186         /* Set digest values to defaults */
 187 #ifndef OPENSSL_NO_DSA
 188         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
 189 #endif
 190 #ifndef OPENSSL_NO_RSA
 191         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
 192         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
 193 #endif
 194 #ifndef OPENSSL_NO_ECDSA
 195         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
 196 #endif
 197         }
 198
 199 CERT *ssl_cert_new(void)
 200         {
 201         CERT *ret;
 202
 203         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
 204         if (ret == NULL)
 205                 {
 206                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
 207                 return(NULL);
 208                 }
 209         memset(ret,0,sizeof(CERT));
 210
 211         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
 212         ret->references=1;
 213         ssl_cert_set_default_md(ret);
 214         return(ret);
 215         }
 216
 217 CERT *ssl_cert_dup(CERT *cert)
 218         {
 219         CERT *ret;
 220         int i;
 221
 222         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
 223         if (ret == NULL)
 224                 {
 225                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 226                 return(NULL);
 227                 }
 228
 229         memset(ret, 0, sizeof(CERT));
 230
 231         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
 232         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
 233          * if you find that more readable */
 234
 235         ret->valid = cert->valid;
 236         ret->mask_k = cert->mask_k;
 237         ret->mask_a = cert->mask_a;
 238         ret->export_mask_k = cert->export_mask_k;
 239         ret->export_mask_a = cert->export_mask_a;
 240
 241 #ifndef OPENSSL_NO_RSA
 242         if (cert->rsa_tmp != NULL)
 243                 {
 244                 RSA_up_ref(cert->rsa_tmp);
 245                 ret->rsa_tmp = cert->rsa_tmp;
 246                 }
 247         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 248 #endif
 249
 250 #ifndef OPENSSL_NO_DH
 251         if (cert->dh_tmp != NULL)
 252                 {
 253                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
 254                 if (ret->dh_tmp == NULL)
 255                         {
 256                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
 257                         goto err;
 258                         }
 259                 if (cert->dh_tmp->priv_key)
 260                         {
 261                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
 262                         if (!b)
 263                                 {
 264                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 265                                 goto err;
 266                                 }
 267                         ret->dh_tmp->priv_key = b;
 268                         }
 269                 if (cert->dh_tmp->pub_key)
 270                         {
 271                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
 272                         if (!b)
 273                                 {
 274                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 275                                 goto err;
 276                                 }
 277                         ret->dh_tmp->pub_key = b;
 278                         }
 279                 }
 280         ret->dh_tmp_cb = cert->dh_tmp_cb;
 281 #endif
 282
 283 #ifndef OPENSSL_NO_ECDH
 284         if (cert->ecdh_tmp)
 285                 {
 286                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 287                 if (ret->ecdh_tmp == NULL)
 288                         {
 289                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 290                         goto err;
 291                         }
 292                 }
 293         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 294         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 295 #endif
 296
 297         for (i = 0; i < SSL_PKEY_NUM; i++)
 298                 {
 299                 CERT_PKEY *cpk = cert->pkeys + i;
 300                 CERT_PKEY *rpk = ret->pkeys + i;
 301                 if (cpk->x509 != NULL)
 302                         {
 303                         rpk->x509 = cpk->x509;
 304                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 305                         }
 306
 307                 if (cpk->privatekey != NULL)
 308                         {
 309                         rpk->privatekey = cpk->privatekey;
 310                         CRYPTO_add(&cpk->privatekey->references, 1,
 311                                 CRYPTO_LOCK_EVP_PKEY);
 312                         }
 313
 314                 if (cpk->chain)
 315                         {
 316                         rpk->chain = X509_chain_up_ref(cpk->chain);
 317                         if (!rpk->chain)
 318                                 {
 319                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 320                                 goto err;
 321                                 }
 322                         }
 323                 rpk->valid_flags = 0;
 324 #ifndef OPENSSL_NO_TLSEXT
 325                 if (cert->pkeys[i].serverinfo != NULL)
 326                         {
 327                         /* Just copy everything. */
 328                         ret->pkeys[i].serverinfo =
 329                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 330                         if (ret->pkeys[i].serverinfo == NULL)
 331                                 {
 332                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 333                                 return NULL;
 334                                 }
 335                         ret->pkeys[i].serverinfo_length =
 336                                 cert->pkeys[i].serverinfo_length;
 337                         memcpy(ret->pkeys[i].serverinfo,
 338                                cert->pkeys[i].serverinfo,
 339                                cert->pkeys[i].serverinfo_length);
 340                         }
 341 #endif
 342                 }
 343
 344         ret->references=1;
 345         /* Set digests to defaults. NB: we don't copy existing values as they
 346          * will be set during handshake.
 347          */
 348         ssl_cert_set_default_md(ret);
 349         /* Peer sigalgs set to NULL as we get these from handshake too */
 350         ret->peer_sigalgs = NULL;
 351         ret->peer_sigalgslen = 0;
 352         /* Configured sigalgs however we copy across */
 353
 354         if (cert->conf_sigalgs)
 355                 {
 356                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 357                 if (!ret->conf_sigalgs)
 358                         goto err;
 359                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 360                                                 cert->conf_sigalgslen);
 361                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 362                 }
 363         else
 364                 ret->conf_sigalgs = NULL;
 365
 366         if (cert->client_sigalgs)
 367                 {
 368                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 369                 if (!ret->client_sigalgs)
 370                         goto err;
 371                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 372                                                 cert->client_sigalgslen);
 373                 ret->client_sigalgslen = cert->client_sigalgslen;
 374                 }
 375         else
 376                 ret->client_sigalgs = NULL;
 377         /* Shared sigalgs also NULL */
 378         ret->shared_sigalgs = NULL;
 379         /* Copy any custom client certificate types */
 380         if (cert->ctypes)
 381                 {
 382                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 383                 if (!ret->ctypes)
 384                         goto err;
 385                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 386                 ret->ctype_num = cert->ctype_num;
 387                 }
 388
 389         ret->cert_flags = cert->cert_flags;
 390
 391         ret->cert_cb = cert->cert_cb;
 392         ret->cert_cb_arg = cert->cert_cb_arg;
 393
 394         if (cert->verify_store)
 395                 {
 396                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 397                 ret->verify_store = cert->verify_store;
 398                 }
 399
 400         if (cert->chain_store)
 401                 {
 402                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 403                 ret->chain_store = cert->chain_store;
 404                 }
 405
 406         ret->ciphers_raw = NULL;
 407
 408 #ifndef OPENSSL_NO_TLSEXT
 409         if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
 410                 goto err;
 411         if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
 412                 goto err;
 413 #endif
 414
 415         return(ret);
 416
 417 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 418 err:
 419 #endif
 420 #ifndef OPENSSL_NO_RSA
 421         if (ret->rsa_tmp != NULL)
 422                 RSA_free(ret->rsa_tmp);
 423 #endif
 424 #ifndef OPENSSL_NO_DH
 425         if (ret->dh_tmp != NULL)
 426                 DH_free(ret->dh_tmp);
 427 #endif
 428 #ifndef OPENSSL_NO_ECDH
 429         if (ret->ecdh_tmp != NULL)
 430                 EC_KEY_free(ret->ecdh_tmp);
 431 #endif
 432
 433 #ifndef OPENSSL_NO_TLSEXT
 434         custom_exts_free(&ret->cli_ext);
 435         custom_exts_free(&ret->srv_ext);
 436 #endif
 437
 438         ssl_cert_clear_certs(ret);
 439
 440         return NULL;
 441         }
 442
 443 /* Free up and clear all certificates and chains */
 444
 445 void ssl_cert_clear_certs(CERT *c)
 446         {
 447         int i;
 448         if (c == NULL)
 449                 return;
 450         for (i = 0; i<SSL_PKEY_NUM; i++)
 451                 {
 452                 CERT_PKEY *cpk = c->pkeys + i;
 453                 if (cpk->x509)
 454                         {
 455                         X509_free(cpk->x509);
 456                         cpk->x509 = NULL;
 457                         }
 458                 if (cpk->privatekey)
 459                         {
 460                         EVP_PKEY_free(cpk->privatekey);
 461                         cpk->privatekey = NULL;
 462                         }
 463                 if (cpk->chain)
 464                         {
 465                         sk_X509_pop_free(cpk->chain, X509_free);
 466                         cpk->chain = NULL;
 467                         }
 468 #ifndef OPENSSL_NO_TLSEXT
 469                 if (cpk->serverinfo)
 470                         {
 471                         OPENSSL_free(cpk->serverinfo);
 472                         cpk->serverinfo = NULL;
 473                         cpk->serverinfo_length = 0;
 474                         }
 475 #endif
 476                 /* Clear all flags apart from explicit sign */
 477                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 478                 }
 479         }
 480
 481 void ssl_cert_free(CERT *c)
 482         {
 483         int i;
 484
 485         if(c == NULL)
 486             return;
 487
 488         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 489 #ifdef REF_PRINT
 490         REF_PRINT("CERT",c);
 491 #endif
 492         if (i > 0) return;
 493 #ifdef REF_CHECK
 494         if (i < 0)
 495                 {
 496                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 497                 abort(); /* ok */
 498                 }
 499 #endif
 500
 501 #ifndef OPENSSL_NO_RSA
 502         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 503 #endif
 504 #ifndef OPENSSL_NO_DH
 505         if (c->dh_tmp) DH_free(c->dh_tmp);
 506 #endif
 507 #ifndef OPENSSL_NO_ECDH
 508         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 509 #endif
 510
 511         ssl_cert_clear_certs(c);
 512         if (c->peer_sigalgs)
 513                 OPENSSL_free(c->peer_sigalgs);
 514         if (c->conf_sigalgs)
 515                 OPENSSL_free(c->conf_sigalgs);
 516         if (c->client_sigalgs)
 517                 OPENSSL_free(c->client_sigalgs);
 518         if (c->shared_sigalgs)
 519                 OPENSSL_free(c->shared_sigalgs);
 520         if (c->ctypes)
 521                 OPENSSL_free(c->ctypes);
 522         if (c->verify_store)
 523                 X509_STORE_free(c->verify_store);
 524         if (c->chain_store)
 525                 X509_STORE_free(c->chain_store);
 526         if (c->ciphers_raw)
 527                 OPENSSL_free(c->ciphers_raw);
 528 #ifndef OPENSSL_NO_TLSEXT
 529         custom_exts_free(&c->cli_ext);
 530         custom_exts_free(&c->srv_ext);
 531 #endif
 532         OPENSSL_free(c);
 533         }
 534
 535 int ssl_cert_inst(CERT **o)
 536         {
 537         /* Create a CERT if there isn't already one
 538          * (which cannot really happen, as it is initially created in
 539          * SSL_CTX_new; but the earlier code usually allows for that one
 540          * being non-existant, so we follow that behaviour, as it might
 541          * turn out that there actually is a reason for it -- but I'm
 542          * not sure that *all* of the existing code could cope with
 543          * s->cert being NULL, otherwise we could do without the
 544          * initialization in SSL_CTX_new).
 545          */
 546
 547         if (o == NULL)
 548                 {
 549                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 550                 return(0);
 551                 }
 552         if (*o == NULL)
 553                 {
 554                 if ((*o = ssl_cert_new()) == NULL)
 555                         {
 556                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 557                         return(0);
 558                         }
 559                 }
 560         return(1);
 561         }
 562
 563 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 564         {
 565         CERT_PKEY *cpk = c->key;
 566         if (!cpk)
 567                 return 0;
 568         if (cpk->chain)
 569                 sk_X509_pop_free(cpk->chain, X509_free);
 570         cpk->chain = chain;
 571         return 1;
 572         }
 573
 574 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 575         {
 576         STACK_OF(X509) *dchain;
 577         if (!chain)
 578                 return ssl_cert_set0_chain(c, NULL);
 579         dchain = X509_chain_up_ref(chain);
 580         if (!dchain)
 581                 return 0;
 582         if (!ssl_cert_set0_chain(c, dchain))
 583                 {
 584                 sk_X509_pop_free(dchain, X509_free);
 585                 return 0;
 586                 }
 587         return 1;
 588         }
 589
 590 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 591         {
 592         CERT_PKEY *cpk = c->key;
 593         if (!cpk)
 594                 return 0;
 595         if (!cpk->chain)
 596                 cpk->chain = sk_X509_new_null();
 597         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 598                 return 0;
 599         return 1;
 600         }
 601
 602 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 603         {
 604         if (!ssl_cert_add0_chain_cert(c, x))
 605                 return 0;
 606         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 607         return 1;
 608         }
 609
 610 int ssl_cert_select_current(CERT *c, X509 *x)
 611         {
 612         int i;
 613         if (x == NULL)
 614                 return 0;
 615         for (i = 0; i < SSL_PKEY_NUM; i++)
 616                 {
 617                 CERT_PKEY *cpk = c->pkeys + i;
 618                 if (cpk->x509 == x && cpk->privatekey)
 619                         {
 620                         c->key = cpk;
 621                         return 1;
 622                         }
 623                 }
 624
 625         for (i = 0; i < SSL_PKEY_NUM; i++)
 626                 {
 627                 CERT_PKEY *cpk = c->pkeys + i;
 628                 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
 629                         {
 630                         c->key = cpk;
 631                         return 1;
 632                         }
 633                 }
 634         return 0;
 635         }
 636
 637 int ssl_cert_set_current(CERT *c, long op)
 638         {
 639         int i, idx;
 640         if (!c)
 641                 return 0;
 642         if (op == SSL_CERT_SET_FIRST)
 643                 idx = 0;
 644         else if (op == SSL_CERT_SET_NEXT)
 645                 {
 646                 idx = (int)(c->key - c->pkeys + 1);
 647                 if (idx >= SSL_PKEY_NUM)
 648                         return 0;
 649                 }
 650         else
 651                 return 0;
 652         for (i = idx; i < SSL_PKEY_NUM; i++)
 653                 {
 654                 CERT_PKEY *cpk = c->pkeys + i;
 655                 if (cpk->x509 && cpk->privatekey)
 656                         {
 657                         c->key = cpk;
 658                         return 1;
 659                         }
 660                 }
 661         return 0;
 662         }
 663
 664 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 665         {
 666         c->cert_cb = cb;
 667         c->cert_cb_arg = arg;
 668         }
 669
 670 SESS_CERT *ssl_sess_cert_new(void)
 671         {
 672         SESS_CERT *ret;
 673
 674         ret = OPENSSL_malloc(sizeof *ret);
 675         if (ret == NULL)
 676                 {
 677                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 678                 return NULL;
 679                 }
 680
 681         memset(ret, 0 ,sizeof *ret);
 682         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 683         ret->references = 1;
 684
 685         return ret;
 686         }
 687
 688 void ssl_sess_cert_free(SESS_CERT *sc)
 689         {
 690         int i;
 691
 692         if (sc == NULL)
 693                 return;
 694
 695         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 696 #ifdef REF_PRINT
 697         REF_PRINT("SESS_CERT", sc);
 698 #endif
 699         if (i > 0)
 700                 return;
 701 #ifdef REF_CHECK
 702         if (i < 0)
 703                 {
 704                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 705                 abort(); /* ok */
 706                 }
 707 #endif
 708
 709         /* i == 0 */
 710         if (sc->cert_chain != NULL)
 711                 sk_X509_pop_free(sc->cert_chain, X509_free);
 712         for (i = 0; i < SSL_PKEY_NUM; i++)
 713                 {
 714                 if (sc->peer_pkeys[i].x509 != NULL)
 715                         X509_free(sc->peer_pkeys[i].x509);
 716 #if 0 /* We don't have the peer's private key.  These lines are just
 717            * here as a reminder that we're still using a not-quite-appropriate
 718            * data structure. */
 719                 if (sc->peer_pkeys[i].privatekey != NULL)
 720                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 721 #endif
 722                 }
 723
 724 #ifndef OPENSSL_NO_RSA
 725         if (sc->peer_rsa_tmp != NULL)
 726                 RSA_free(sc->peer_rsa_tmp);
 727 #endif
 728 #ifndef OPENSSL_NO_DH
 729         if (sc->peer_dh_tmp != NULL)
 730                 DH_free(sc->peer_dh_tmp);
 731 #endif
 732 #ifndef OPENSSL_NO_ECDH
 733         if (sc->peer_ecdh_tmp != NULL)
 734                 EC_KEY_free(sc->peer_ecdh_tmp);
 735 #endif
 736
 737         OPENSSL_free(sc);
 738         }
 739
 740 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 741         {
 742         sc->peer_cert_type = type;
 743         return(1);
 744         }
 745
 746 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 747         {
 748         X509 *x;
 749         int i;
 750         X509_STORE *verify_store;
 751         X509_STORE_CTX ctx;
 752
 753         if (s->cert->verify_store)
 754                 verify_store = s->cert->verify_store;
 755         else
 756                 verify_store = s->ctx->cert_store;
 757
 758         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 759                 return(0);
 760
 761         x=sk_X509_value(sk,0);
 762         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 763                 {
 764                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 765                 return(0);
 766                 }
 767         /* Set suite B flags if needed */
 768         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 769 #if 0
 770         if (SSL_get_verify_depth(s) >= 0)
 771                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 772 #endif
 773         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 774
 775         /* We need to inherit the verify parameters. These can be determined by
 776          * the context: if its a server it will verify SSL client certificates
 777          * or vice versa.
 778          */
 779
 780         X509_STORE_CTX_set_default(&ctx,
 781                                 s->server ? "ssl_client" : "ssl_server");
 782         /* Anything non-default in "param" should overwrite anything in the
 783          * ctx.
 784          */
 785         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 786
 787         if (s->verify_callback)
 788                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 789
 790         if (s->ctx->app_verify_callback != NULL)
 791 #if 1 /* new with OpenSSL 0.9.7 */
 792                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 793 #else
 794                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 795 #endif
 796         else
 797                 {
 798 #ifndef OPENSSL_NO_X509_VERIFY
 799                 i=X509_verify_cert(&ctx);
 800 #else
 801                 i=0;
 802                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 803                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 804 #endif
 805                 }
 806
 807         s->verify_result=ctx.error;
 808         X509_STORE_CTX_cleanup(&ctx);
 809
 810         return(i);
 811         }
 812
 813 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 814         {
 815         if (*ca_list != NULL)
 816                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 817
 818         *ca_list=name_list;
 819         }
 820
 821 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 822         {
 823         int i;
 824         STACK_OF(X509_NAME) *ret;
 825         X509_NAME *name;
 826
 827         ret=sk_X509_NAME_new_null();
 828         for (i=0; i<sk_X509_NAME_num(sk); i++)
 829                 {
 830                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 831                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 832                         {
 833                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 834                         return(NULL);
 835                         }
 836                 }
 837         return(ret);
 838         }
 839
 840 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 841         {
 842         set_client_CA_list(&(s->client_CA),name_list);
 843         }
 844
 845 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 846         {
 847         set_client_CA_list(&(ctx->client_CA),name_list);
 848         }
 849
 850 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 851         {
 852         return(ctx->client_CA);
 853         }
 854
 855 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 856         {
 857         if (s->type == SSL_ST_CONNECT)
 858                 { /* we are in the client */
 859                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 860                         (s->s3 != NULL))
 861                         return(s->s3->tmp.ca_names);
 862                 else
 863                         return(NULL);
 864                 }
 865         else
 866                 {
 867                 if (s->client_CA != NULL)
 868                         return(s->client_CA);
 869                 else
 870                         return(s->ctx->client_CA);
 871                 }
 872         }
 873
 874 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 875         {
 876         X509_NAME *name;
 877
 878         if (x == NULL) return(0);
 879         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 880                 return(0);
 881
 882         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 883                 return(0);
 884
 885         if (!sk_X509_NAME_push(*sk,name))
 886                 {
 887                 X509_NAME_free(name);
 888                 return(0);
 889                 }
 890         return(1);
 891         }
 892
 893 int SSL_add_client_CA(SSL *ssl,X509 *x)
 894         {
 895         return(add_client_CA(&(ssl->client_CA),x));
 896         }
 897
 898 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 899         {
 900         return(add_client_CA(&(ctx->client_CA),x));
 901         }
 902
 903 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 904         {
 905         return(X509_NAME_cmp(*a,*b));
 906         }
 907
 908 #ifndef OPENSSL_NO_STDIO
 909 /*!
 910  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 911  * it doesn't really have anything to do with clients (except that a common use
 912  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 913  * much to do with CAs, either, since it will load any old cert.
 914  * \param file the file containing one or more certs.
 915  * \return a ::STACK containing the certs.
 916  */
 917 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 918         {
 919         BIO *in;
 920         X509 *x=NULL;
 921         X509_NAME *xn=NULL;
 922         STACK_OF(X509_NAME) *ret = NULL,*sk;
 923
 924         sk=sk_X509_NAME_new(xname_cmp);
 925
 926         in=BIO_new(BIO_s_file_internal());
 927
 928         if ((sk == NULL) || (in == NULL))
 929                 {
 930                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 931                 goto err;
 932                 }
 933
 934         if (!BIO_read_filename(in,file))
 935                 goto err;
 936
 937         for (;;)
 938                 {
 939                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 940                         break;
 941                 if (ret == NULL)
 942                         {
 943                         ret = sk_X509_NAME_new_null();
 944                         if (ret == NULL)
 945                                 {
 946                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 947                                 goto err;
 948                                 }
 949                         }
 950                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 951                 /* check for duplicates */
 952                 xn=X509_NAME_dup(xn);
 953                 if (xn == NULL) goto err;
 954                 if (sk_X509_NAME_find(sk,xn) >= 0)
 955                         X509_NAME_free(xn);
 956                 else
 957                         {
 958                         sk_X509_NAME_push(sk,xn);
 959                         sk_X509_NAME_push(ret,xn);
 960                         }
 961                 }
 962
 963         if (0)
 964                 {
 965 err:
 966                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 967                 ret=NULL;
 968                 }
 969         if (sk != NULL) sk_X509_NAME_free(sk);
 970         if (in != NULL) BIO_free(in);
 971         if (x != NULL) X509_free(x);
 972         if (ret != NULL)
 973                 ERR_clear_error();
 974         return(ret);
 975         }
 976 #endif
 977
 978 /*!
 979  * Add a file of certs to a stack.
 980  * \param stack the stack to add to.
 981  * \param file the file to add from. All certs in this file that are not
 982  * already in the stack will be added.
 983  * \return 1 for success, 0 for failure. Note that in the case of failure some
 984  * certs may have been added to \c stack.
 985  */
 986
 987 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 988                                         const char *file)
 989         {
 990         BIO *in;
 991         X509 *x=NULL;
 992         X509_NAME *xn=NULL;
 993         int ret=1;
 994         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 995
 996         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 997
 998         in=BIO_new(BIO_s_file_internal());
 999
1000         if (in == NULL)
1001                 {
1002                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1003                 goto err;
1004                 }
1005
1006         if (!BIO_read_filename(in,file))
1007                 goto err;
1008
1009         for (;;)
1010                 {
1011                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1012                         break;
1013                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1014                 xn=X509_NAME_dup(xn);
1015                 if (xn == NULL) goto err;
1016                 if (sk_X509_NAME_find(stack,xn) >= 0)
1017                         X509_NAME_free(xn);
1018                 else
1019                         sk_X509_NAME_push(stack,xn);
1020                 }
1021
1022         ERR_clear_error();
1023
1024         if (0)
1025                 {
1026 err:
1027                 ret=0;
1028                 }
1029         if(in != NULL)
1030                 BIO_free(in);
1031         if(x != NULL)
1032                 X509_free(x);
1033
1034         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1035
1036         return ret;
1037         }
1038
1039 /*!
1040  * Add a directory of certs to a stack.
1041  * \param stack the stack to append to.
1042  * \param dir the directory to append from. All files in this directory will be
1043  * examined as potential certs. Any that are acceptable to
1044  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1045  * included.
1046  * \return 1 for success, 0 for failure. Note that in the case of failure some
1047  * certs may have been added to \c stack.
1048  */
1049
1050 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1051                                        const char *dir)
1052         {
1053         OPENSSL_DIR_CTX *d = NULL;
1054         const char *filename;
1055         int ret = 0;
1056
1057         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1058
1059         /* Note that a side effect is that the CAs will be sorted by name */
1060
1061         while((filename = OPENSSL_DIR_read(&d, dir)))
1062                 {
1063                 char buf[1024];
1064                 int r;
1065
1066                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1067                         {
1068                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1069                         goto err;
1070                         }
1071
1072 #ifdef OPENSSL_SYS_VMS
1073                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1074 #else
1075                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1076 #endif
1077                 if (r <= 0 || r >= (int)sizeof(buf))
1078                         goto err;
1079                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1080                         goto err;
1081                 }
1082
1083         if (errno)
1084                 {
1085                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1086                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1087                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1088                 goto err;
1089                 }
1090
1091         ret = 1;
1092
1093 err:
1094         if (d) OPENSSL_DIR_end(&d);
1095         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1096         return ret;
1097         }
1098
1099 /* Add a certificate to a BUF_MEM structure */
1100
1101 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1102         {
1103         int n;
1104         unsigned char *p;
1105
1106         n=i2d_X509(x,NULL);
1107         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1108                 {
1109                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1110                 return 0;
1111                 }
1112         p=(unsigned char *)&(buf->data[*l]);
1113         l2n3(n,p);
1114         i2d_X509(x,&p);
1115         *l+=n+3;
1116
1117         return 1;
1118         }
1119
1120 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1121 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1122         {
1123         BUF_MEM *buf = s->init_buf;
1124         int no_chain;
1125         int i;
1126
1127         X509 *x;
1128         STACK_OF(X509) *extra_certs;
1129         X509_STORE *chain_store;
1130
1131         if (cpk)
1132                 x = cpk->x509;
1133         else
1134                 x = NULL;
1135
1136         if (s->cert->chain_store)
1137                 chain_store = s->cert->chain_store;
1138         else
1139                 chain_store = s->ctx->cert_store;
1140
1141         /* If we have a certificate specific chain use it, else use
1142          * parent ctx.
1143          */
1144         if (cpk && cpk->chain)
1145                 extra_certs = cpk->chain;
1146         else
1147                 extra_certs = s->ctx->extra_certs;
1148
1149         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1150                 no_chain = 1;
1151         else
1152                 no_chain = 0;
1153
1154         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1155         if (!BUF_MEM_grow_clean(buf,10))
1156                 {
1157                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1158                 return 0;
1159                 }
1160         if (x != NULL)
1161                 {
1162                 if (no_chain)
1163                         {
1164                         if (!ssl_add_cert_to_buf(buf, l, x))
1165                                 return 0;
1166                         }
1167                 else
1168                         {
1169                         X509_STORE_CTX xs_ctx;
1170
1171                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1172                                 {
1173                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1174                                 return(0);
1175                                 }
1176                         X509_verify_cert(&xs_ctx);
1177                         /* Don't leave errors in the queue */
1178                         ERR_clear_error();
1179                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1180                                 {
1181                                 x = sk_X509_value(xs_ctx.chain, i);
1182
1183                                 if (!ssl_add_cert_to_buf(buf, l, x))
1184                                         {
1185                                         X509_STORE_CTX_cleanup(&xs_ctx);
1186                                         return 0;
1187                                         }
1188                                 }
1189                         X509_STORE_CTX_cleanup(&xs_ctx);
1190                         }
1191                 }
1192         for (i=0; i<sk_X509_num(extra_certs); i++)
1193                 {
1194                 x=sk_X509_value(extra_certs,i);
1195                 if (!ssl_add_cert_to_buf(buf, l, x))
1196                         return 0;
1197                 }
1198
1199         return 1;
1200         }
1201
1202 /* Build a certificate chain for current certificate */
1203 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1204         {
1205         CERT_PKEY *cpk = c->key;
1206         X509_STORE_CTX xs_ctx;
1207         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1208         X509 *x;
1209         int i, rv = 0;
1210         unsigned long error;
1211
1212         if (!cpk->x509)
1213                 {
1214                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1215                 goto err;
1216                 }
1217         /* Rearranging and check the chain: add everything to a store */
1218         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1219                 {
1220                 chain_store = X509_STORE_new();
1221                 if (!chain_store)
1222                         goto err;
1223                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1224                         {
1225                         x = sk_X509_value(cpk->chain, i);
1226                         if (!X509_STORE_add_cert(chain_store, x))
1227                                 {
1228                                 error = ERR_peek_last_error();
1229                                 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1230                                     ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1231                                         goto err;
1232                                 ERR_clear_error();
1233                                 }
1234                         }
1235                 /* Add EE cert too: it might be self signed */
1236                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1237                         {
1238                         error = ERR_peek_last_error();
1239                         if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1240                             ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1241                                 goto err;
1242                         ERR_clear_error();
1243                         }
1244                 }
1245         else
1246                 {
1247                 if (c->chain_store)
1248                         chain_store = c->chain_store;
1249
1250                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1251                         untrusted = cpk->chain;
1252                 }
1253
1254         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1255                 {
1256                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1257                 goto err;
1258                 }
1259         /* Set suite B flags if needed */
1260         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1261
1262         i = X509_verify_cert(&xs_ctx);
1263         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1264                 {
1265                 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1266                         ERR_clear_error();
1267                 i = 1;
1268                 rv = 2;
1269                 }
1270         if (i > 0)
1271                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1272         if (i <= 0)
1273                 {
1274                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1275                 i = X509_STORE_CTX_get_error(&xs_ctx);
1276                 ERR_add_error_data(2, "Verify error:",
1277                                         X509_verify_cert_error_string(i));
1278
1279                 X509_STORE_CTX_cleanup(&xs_ctx);
1280                 goto err;
1281                 }
1282         X509_STORE_CTX_cleanup(&xs_ctx);
1283         if (cpk->chain)
1284                 sk_X509_pop_free(cpk->chain, X509_free);
1285         /* Remove EE certificate from chain */
1286         x = sk_X509_shift(chain);
1287         X509_free(x);
1288         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1289                 {
1290                 if (sk_X509_num(chain) > 0)
1291                         {
1292                         /* See if last cert is self signed */
1293                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1294                         X509_check_purpose(x, -1, 0);
1295                         if (x->ex_flags & EXFLAG_SS)
1296                                 {
1297                                 x = sk_X509_pop(chain);
1298                                 X509_free(x);
1299                                 }
1300                         }
1301                 }
1302         cpk->chain = chain;
1303         if (rv == 0)
1304                 rv = 1;
1305         err:
1306         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1307                 X509_STORE_free(chain_store);
1308
1309         return rv;
1310         }
1311
1312 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1313         {
1314         X509_STORE **pstore;
1315         if (chain)
1316                 pstore = &c->chain_store;
1317         else
1318                 pstore = &c->verify_store;
1319         if (*pstore)
1320                 X509_STORE_free(*pstore);
1321         *pstore = store;
1322         if (ref && store)
1323                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1324         return 1;
1325         }
1326