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                         switch(i)
 314                                 {
 315                                 /* If there was anything special to do for
 316                                  * certain types of keys, we'd do it here.
 317                                  * (Nothing at the moment, I think.) */
 318
 319                         case SSL_PKEY_RSA_ENC:
 320                         case SSL_PKEY_RSA_SIGN:
 321                                 /* We have an RSA key. */
 322                                 break;
 323
 324                         case SSL_PKEY_DSA_SIGN:
 325                                 /* We have a DSA key. */
 326                                 break;
 327
 328                         case SSL_PKEY_DH_RSA:
 329                         case SSL_PKEY_DH_DSA:
 330                                 /* We have a DH key. */
 331                                 break;
 332
 333                         case SSL_PKEY_ECC:
 334                                 /* We have an ECC key */
 335                                 break;
 336
 337                         default:
 338                                 /* Can't happen. */
 339                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 340                                 }
 341                         }
 342
 343                 if (cpk->chain)
 344                         {
 345                         rpk->chain = X509_chain_up_ref(cpk->chain);
 346                         if (!rpk->chain)
 347                                 {
 348                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 349                                 goto err;
 350                                 }
 351                         }
 352                 rpk->valid_flags = 0;
 353 #ifndef OPENSSL_NO_TLSEXT
 354                 if (cert->pkeys[i].serverinfo != NULL)
 355                         {
 356                         /* Just copy everything. */
 357                         ret->pkeys[i].serverinfo =
 358                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 359                         if (ret->pkeys[i].serverinfo == NULL)
 360                                 {
 361                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 362                                 return NULL;
 363                                 }
 364                         ret->pkeys[i].serverinfo_length =
 365                                 cert->pkeys[i].serverinfo_length;
 366                         memcpy(ret->pkeys[i].serverinfo,
 367                                cert->pkeys[i].serverinfo,
 368                                cert->pkeys[i].serverinfo_length);
 369                         }
 370 #endif
 371                 }
 372
 373         ret->references=1;
 374         /* Set digests to defaults. NB: we don't copy existing values as they
 375          * will be set during handshake.
 376          */
 377         ssl_cert_set_default_md(ret);
 378         /* Peer sigalgs set to NULL as we get these from handshake too */
 379         ret->peer_sigalgs = NULL;
 380         ret->peer_sigalgslen = 0;
 381         /* Configured sigalgs however we copy across */
 382
 383         if (cert->conf_sigalgs)
 384                 {
 385                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 386                 if (!ret->conf_sigalgs)
 387                         goto err;
 388                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 389                                                 cert->conf_sigalgslen);
 390                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 391                 }
 392         else
 393                 ret->conf_sigalgs = NULL;
 394
 395         if (cert->client_sigalgs)
 396                 {
 397                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 398                 if (!ret->client_sigalgs)
 399                         goto err;
 400                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 401                                                 cert->client_sigalgslen);
 402                 ret->client_sigalgslen = cert->client_sigalgslen;
 403                 }
 404         else
 405                 ret->client_sigalgs = NULL;
 406         /* Shared sigalgs also NULL */
 407         ret->shared_sigalgs = NULL;
 408         /* Copy any custom client certificate types */
 409         if (cert->ctypes)
 410                 {
 411                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 412                 if (!ret->ctypes)
 413                         goto err;
 414                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 415                 ret->ctype_num = cert->ctype_num;
 416                 }
 417
 418         ret->cert_flags = cert->cert_flags;
 419
 420         ret->cert_cb = cert->cert_cb;
 421         ret->cert_cb_arg = cert->cert_cb_arg;
 422
 423         if (cert->verify_store)
 424                 {
 425                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 426                 ret->verify_store = cert->verify_store;
 427                 }
 428
 429         if (cert->chain_store)
 430                 {
 431                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 432                 ret->chain_store = cert->chain_store;
 433                 }
 434
 435         ret->ciphers_raw = NULL;
 436
 437         return(ret);
 438
 439 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 440 err:
 441 #endif
 442 #ifndef OPENSSL_NO_RSA
 443         if (ret->rsa_tmp != NULL)
 444                 RSA_free(ret->rsa_tmp);
 445 #endif
 446 #ifndef OPENSSL_NO_DH
 447         if (ret->dh_tmp != NULL)
 448                 DH_free(ret->dh_tmp);
 449 #endif
 450 #ifndef OPENSSL_NO_ECDH
 451         if (ret->ecdh_tmp != NULL)
 452                 EC_KEY_free(ret->ecdh_tmp);
 453 #endif
 454
 455         ssl_cert_clear_certs(ret);
 456
 457         return NULL;
 458         }
 459
 460 /* Free up and clear all certificates and chains */
 461
 462 void ssl_cert_clear_certs(CERT *c)
 463         {
 464         int i;
 465         if (c == NULL)
 466                 return;
 467         for (i = 0; i<SSL_PKEY_NUM; i++)
 468                 {
 469                 CERT_PKEY *cpk = c->pkeys + i;
 470                 if (cpk->x509)
 471                         {
 472                         X509_free(cpk->x509);
 473                         cpk->x509 = NULL;
 474                         }
 475                 if (cpk->privatekey)
 476                         {
 477                         EVP_PKEY_free(cpk->privatekey);
 478                         cpk->privatekey = NULL;
 479                         }
 480                 if (cpk->chain)
 481                         {
 482                         sk_X509_pop_free(cpk->chain, X509_free);
 483                         cpk->chain = NULL;
 484                         }
 485 #ifndef OPENSSL_NO_TLSEXT
 486                 if (cpk->serverinfo)
 487                         {
 488                         OPENSSL_free(cpk->serverinfo);
 489                         cpk->serverinfo = NULL;
 490                         cpk->serverinfo_length = 0;
 491                         }
 492 #endif
 493                 /* Clear all flags apart from explicit sign */
 494                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 495                 }
 496         }
 497
 498 void ssl_cert_free(CERT *c)
 499         {
 500         int i;
 501
 502         if(c == NULL)
 503             return;
 504
 505         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 506 #ifdef REF_PRINT
 507         REF_PRINT("CERT",c);
 508 #endif
 509         if (i > 0) return;
 510 #ifdef REF_CHECK
 511         if (i < 0)
 512                 {
 513                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 514                 abort(); /* ok */
 515                 }
 516 #endif
 517
 518 #ifndef OPENSSL_NO_RSA
 519         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 520 #endif
 521 #ifndef OPENSSL_NO_DH
 522         if (c->dh_tmp) DH_free(c->dh_tmp);
 523 #endif
 524 #ifndef OPENSSL_NO_ECDH
 525         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 526 #endif
 527
 528         ssl_cert_clear_certs(c);
 529         if (c->peer_sigalgs)
 530                 OPENSSL_free(c->peer_sigalgs);
 531         if (c->conf_sigalgs)
 532                 OPENSSL_free(c->conf_sigalgs);
 533         if (c->client_sigalgs)
 534                 OPENSSL_free(c->client_sigalgs);
 535         if (c->shared_sigalgs)
 536                 OPENSSL_free(c->shared_sigalgs);
 537         if (c->ctypes)
 538                 OPENSSL_free(c->ctypes);
 539         if (c->verify_store)
 540                 X509_STORE_free(c->verify_store);
 541         if (c->chain_store)
 542                 X509_STORE_free(c->chain_store);
 543         if (c->ciphers_raw)
 544                 OPENSSL_free(c->ciphers_raw);
 545         OPENSSL_free(c);
 546         }
 547
 548 int ssl_cert_inst(CERT **o)
 549         {
 550         /* Create a CERT if there isn't already one
 551          * (which cannot really happen, as it is initially created in
 552          * SSL_CTX_new; but the earlier code usually allows for that one
 553          * being non-existant, so we follow that behaviour, as it might
 554          * turn out that there actually is a reason for it -- but I'm
 555          * not sure that *all* of the existing code could cope with
 556          * s->cert being NULL, otherwise we could do without the
 557          * initialization in SSL_CTX_new).
 558          */
 559
 560         if (o == NULL)
 561                 {
 562                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 563                 return(0);
 564                 }
 565         if (*o == NULL)
 566                 {
 567                 if ((*o = ssl_cert_new()) == NULL)
 568                         {
 569                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 570                         return(0);
 571                         }
 572                 }
 573         return(1);
 574         }
 575
 576 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 577         {
 578         CERT_PKEY *cpk = c->key;
 579         if (!cpk)
 580                 return 0;
 581         if (cpk->chain)
 582                 sk_X509_pop_free(cpk->chain, X509_free);
 583         cpk->chain = chain;
 584         return 1;
 585         }
 586
 587 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 588         {
 589         STACK_OF(X509) *dchain;
 590         if (!chain)
 591                 return ssl_cert_set0_chain(c, NULL);
 592         dchain = X509_chain_up_ref(chain);
 593         if (!dchain)
 594                 return 0;
 595         if (!ssl_cert_set0_chain(c, dchain))
 596                 {
 597                 sk_X509_pop_free(dchain, X509_free);
 598                 return 0;
 599                 }
 600         return 1;
 601         }
 602
 603 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 604         {
 605         CERT_PKEY *cpk = c->key;
 606         if (!cpk)
 607                 return 0;
 608         if (!cpk->chain)
 609                 cpk->chain = sk_X509_new_null();
 610         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 611                 return 0;
 612         return 1;
 613         }
 614
 615 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 616         {
 617         if (!ssl_cert_add0_chain_cert(c, x))
 618                 return 0;
 619         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 620         return 1;
 621         }
 622
 623 int ssl_cert_select_current(CERT *c, X509 *x)
 624         {
 625         int i;
 626         if (x == NULL)
 627                 return 0;
 628         for (i = 0; i < SSL_PKEY_NUM; i++)
 629                 {
 630                 CERT_PKEY *cpk = c->pkeys + i;
 631                 if (cpk->x509 == x && cpk->privatekey)
 632                         {
 633                         c->key = cpk;
 634                         return 1;
 635                         }
 636                 }
 637
 638         for (i = 0; i < SSL_PKEY_NUM; i++)
 639                 {
 640                 CERT_PKEY *cpk = c->pkeys + i;
 641                 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
 642                         {
 643                         c->key = cpk;
 644                         return 1;
 645                         }
 646                 }
 647         return 0;
 648         }
 649
 650 int ssl_cert_set_current(CERT *c, long op)
 651         {
 652         int i, idx;
 653         if (!c)
 654                 return 0;
 655         if (op == SSL_CERT_SET_FIRST)
 656                 idx = 0;
 657         else if (op == SSL_CERT_SET_NEXT)
 658                 {
 659                 idx = (int)(c->key - c->pkeys + 1);
 660                 if (idx >= SSL_PKEY_NUM)
 661                         return 0;
 662                 }
 663         else
 664                 return 0;
 665         for (i = idx; i < SSL_PKEY_NUM; i++)
 666                 {
 667                 CERT_PKEY *cpk = c->pkeys + i;
 668                 if (cpk->x509 && cpk->privatekey)
 669                         {
 670                         c->key = cpk;
 671                         return 1;
 672                         }
 673                 }
 674         return 0;
 675         }
 676
 677 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 678         {
 679         c->cert_cb = cb;
 680         c->cert_cb_arg = arg;
 681         }
 682
 683 SESS_CERT *ssl_sess_cert_new(void)
 684         {
 685         SESS_CERT *ret;
 686
 687         ret = OPENSSL_malloc(sizeof *ret);
 688         if (ret == NULL)
 689                 {
 690                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 691                 return NULL;
 692                 }
 693
 694         memset(ret, 0 ,sizeof *ret);
 695         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 696         ret->references = 1;
 697
 698         return ret;
 699         }
 700
 701 void ssl_sess_cert_free(SESS_CERT *sc)
 702         {
 703         int i;
 704
 705         if (sc == NULL)
 706                 return;
 707
 708         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 709 #ifdef REF_PRINT
 710         REF_PRINT("SESS_CERT", sc);
 711 #endif
 712         if (i > 0)
 713                 return;
 714 #ifdef REF_CHECK
 715         if (i < 0)
 716                 {
 717                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 718                 abort(); /* ok */
 719                 }
 720 #endif
 721
 722         /* i == 0 */
 723         if (sc->cert_chain != NULL)
 724                 sk_X509_pop_free(sc->cert_chain, X509_free);
 725         for (i = 0; i < SSL_PKEY_NUM; i++)
 726                 {
 727                 if (sc->peer_pkeys[i].x509 != NULL)
 728                         X509_free(sc->peer_pkeys[i].x509);
 729 #if 0 /* We don't have the peer's private key.  These lines are just
 730            * here as a reminder that we're still using a not-quite-appropriate
 731            * data structure. */
 732                 if (sc->peer_pkeys[i].privatekey != NULL)
 733                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 734 #endif
 735                 }
 736
 737 #ifndef OPENSSL_NO_RSA
 738         if (sc->peer_rsa_tmp != NULL)
 739                 RSA_free(sc->peer_rsa_tmp);
 740 #endif
 741 #ifndef OPENSSL_NO_DH
 742         if (sc->peer_dh_tmp != NULL)
 743                 DH_free(sc->peer_dh_tmp);
 744 #endif
 745 #ifndef OPENSSL_NO_ECDH
 746         if (sc->peer_ecdh_tmp != NULL)
 747                 EC_KEY_free(sc->peer_ecdh_tmp);
 748 #endif
 749
 750         OPENSSL_free(sc);
 751         }
 752
 753 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 754         {
 755         sc->peer_cert_type = type;
 756         return(1);
 757         }
 758
 759 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 760         {
 761         X509 *x;
 762         int i;
 763         X509_STORE *verify_store;
 764         X509_STORE_CTX ctx;
 765
 766         if (s->cert->verify_store)
 767                 verify_store = s->cert->verify_store;
 768         else
 769                 verify_store = s->ctx->cert_store;
 770
 771         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 772                 return(0);
 773
 774         x=sk_X509_value(sk,0);
 775         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 776                 {
 777                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 778                 return(0);
 779                 }
 780         /* Set suite B flags if needed */
 781         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 782 #if 0
 783         if (SSL_get_verify_depth(s) >= 0)
 784                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 785 #endif
 786         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 787
 788         /* We need to inherit the verify parameters. These can be determined by
 789          * the context: if its a server it will verify SSL client certificates
 790          * or vice versa.
 791          */
 792
 793         X509_STORE_CTX_set_default(&ctx,
 794                                 s->server ? "ssl_client" : "ssl_server");
 795         /* Anything non-default in "param" should overwrite anything in the
 796          * ctx.
 797          */
 798         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 799
 800         if (s->verify_callback)
 801                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 802
 803         if (s->ctx->app_verify_callback != NULL)
 804 #if 1 /* new with OpenSSL 0.9.7 */
 805                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 806 #else
 807                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 808 #endif
 809         else
 810                 {
 811 #ifndef OPENSSL_NO_X509_VERIFY
 812                 i=X509_verify_cert(&ctx);
 813 #else
 814                 i=0;
 815                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 816                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 817 #endif
 818                 }
 819
 820         s->verify_result=ctx.error;
 821         X509_STORE_CTX_cleanup(&ctx);
 822
 823         return(i);
 824         }
 825
 826 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 827         {
 828         if (*ca_list != NULL)
 829                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 830
 831         *ca_list=name_list;
 832         }
 833
 834 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 835         {
 836         int i;
 837         STACK_OF(X509_NAME) *ret;
 838         X509_NAME *name;
 839
 840         ret=sk_X509_NAME_new_null();
 841         for (i=0; i<sk_X509_NAME_num(sk); i++)
 842                 {
 843                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 844                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 845                         {
 846                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 847                         return(NULL);
 848                         }
 849                 }
 850         return(ret);
 851         }
 852
 853 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 854         {
 855         set_client_CA_list(&(s->client_CA),name_list);
 856         }
 857
 858 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 859         {
 860         set_client_CA_list(&(ctx->client_CA),name_list);
 861         }
 862
 863 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 864         {
 865         return(ctx->client_CA);
 866         }
 867
 868 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 869         {
 870         if (s->type == SSL_ST_CONNECT)
 871                 { /* we are in the client */
 872                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 873                         (s->s3 != NULL))
 874                         return(s->s3->tmp.ca_names);
 875                 else
 876                         return(NULL);
 877                 }
 878         else
 879                 {
 880                 if (s->client_CA != NULL)
 881                         return(s->client_CA);
 882                 else
 883                         return(s->ctx->client_CA);
 884                 }
 885         }
 886
 887 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 888         {
 889         X509_NAME *name;
 890
 891         if (x == NULL) return(0);
 892         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 893                 return(0);
 894
 895         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 896                 return(0);
 897
 898         if (!sk_X509_NAME_push(*sk,name))
 899                 {
 900                 X509_NAME_free(name);
 901                 return(0);
 902                 }
 903         return(1);
 904         }
 905
 906 int SSL_add_client_CA(SSL *ssl,X509 *x)
 907         {
 908         return(add_client_CA(&(ssl->client_CA),x));
 909         }
 910
 911 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 912         {
 913         return(add_client_CA(&(ctx->client_CA),x));
 914         }
 915
 916 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 917         {
 918         return(X509_NAME_cmp(*a,*b));
 919         }
 920
 921 #ifndef OPENSSL_NO_STDIO
 922 /*!
 923  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 924  * it doesn't really have anything to do with clients (except that a common use
 925  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 926  * much to do with CAs, either, since it will load any old cert.
 927  * \param file the file containing one or more certs.
 928  * \return a ::STACK containing the certs.
 929  */
 930 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 931         {
 932         BIO *in;
 933         X509 *x=NULL;
 934         X509_NAME *xn=NULL;
 935         STACK_OF(X509_NAME) *ret = NULL,*sk;
 936
 937         sk=sk_X509_NAME_new(xname_cmp);
 938
 939         in=BIO_new(BIO_s_file_internal());
 940
 941         if ((sk == NULL) || (in == NULL))
 942                 {
 943                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 944                 goto err;
 945                 }
 946
 947         if (!BIO_read_filename(in,file))
 948                 goto err;
 949
 950         for (;;)
 951                 {
 952                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 953                         break;
 954                 if (ret == NULL)
 955                         {
 956                         ret = sk_X509_NAME_new_null();
 957                         if (ret == NULL)
 958                                 {
 959                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 960                                 goto err;
 961                                 }
 962                         }
 963                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 964                 /* check for duplicates */
 965                 xn=X509_NAME_dup(xn);
 966                 if (xn == NULL) goto err;
 967                 if (sk_X509_NAME_find(sk,xn) >= 0)
 968                         X509_NAME_free(xn);
 969                 else
 970                         {
 971                         sk_X509_NAME_push(sk,xn);
 972                         sk_X509_NAME_push(ret,xn);
 973                         }
 974                 }
 975
 976         if (0)
 977                 {
 978 err:
 979                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 980                 ret=NULL;
 981                 }
 982         if (sk != NULL) sk_X509_NAME_free(sk);
 983         if (in != NULL) BIO_free(in);
 984         if (x != NULL) X509_free(x);
 985         if (ret != NULL)
 986                 ERR_clear_error();
 987         return(ret);
 988         }
 989 #endif
 990
 991 /*!
 992  * Add a file of certs to a stack.
 993  * \param stack the stack to add to.
 994  * \param file the file to add from. All certs in this file that are not
 995  * already in the stack will be added.
 996  * \return 1 for success, 0 for failure. Note that in the case of failure some
 997  * certs may have been added to \c stack.
 998  */
 999
1000 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1001                                         const char *file)
1002         {
1003         BIO *in;
1004         X509 *x=NULL;
1005         X509_NAME *xn=NULL;
1006         int ret=1;
1007         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1008
1009         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1010
1011         in=BIO_new(BIO_s_file_internal());
1012
1013         if (in == NULL)
1014                 {
1015                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1016                 goto err;
1017                 }
1018
1019         if (!BIO_read_filename(in,file))
1020                 goto err;
1021
1022         for (;;)
1023                 {
1024                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1025                         break;
1026                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1027                 xn=X509_NAME_dup(xn);
1028                 if (xn == NULL) goto err;
1029                 if (sk_X509_NAME_find(stack,xn) >= 0)
1030                         X509_NAME_free(xn);
1031                 else
1032                         sk_X509_NAME_push(stack,xn);
1033                 }
1034
1035         ERR_clear_error();
1036
1037         if (0)
1038                 {
1039 err:
1040                 ret=0;
1041                 }
1042         if(in != NULL)
1043                 BIO_free(in);
1044         if(x != NULL)
1045                 X509_free(x);
1046
1047         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1048
1049         return ret;
1050         }
1051
1052 /*!
1053  * Add a directory of certs to a stack.
1054  * \param stack the stack to append to.
1055  * \param dir the directory to append from. All files in this directory will be
1056  * examined as potential certs. Any that are acceptable to
1057  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1058  * included.
1059  * \return 1 for success, 0 for failure. Note that in the case of failure some
1060  * certs may have been added to \c stack.
1061  */
1062
1063 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1064                                        const char *dir)
1065         {
1066         OPENSSL_DIR_CTX *d = NULL;
1067         const char *filename;
1068         int ret = 0;
1069
1070         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1071
1072         /* Note that a side effect is that the CAs will be sorted by name */
1073
1074         while((filename = OPENSSL_DIR_read(&d, dir)))
1075                 {
1076                 char buf[1024];
1077                 int r;
1078
1079                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1080                         {
1081                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1082                         goto err;
1083                         }
1084
1085 #ifdef OPENSSL_SYS_VMS
1086                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1087 #else
1088                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1089 #endif
1090                 if (r <= 0 || r >= (int)sizeof(buf))
1091                         goto err;
1092                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1093                         goto err;
1094                 }
1095
1096         if (errno)
1097                 {
1098                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1099                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1100                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1101                 goto err;
1102                 }
1103
1104         ret = 1;
1105
1106 err:
1107         if (d) OPENSSL_DIR_end(&d);
1108         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1109         return ret;
1110         }
1111
1112 /* Add a certificate to a BUF_MEM structure */
1113
1114 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1115         {
1116         int n;
1117         unsigned char *p;
1118
1119         n=i2d_X509(x,NULL);
1120         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1121                 {
1122                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1123                 return 0;
1124                 }
1125         p=(unsigned char *)&(buf->data[*l]);
1126         l2n3(n,p);
1127         i2d_X509(x,&p);
1128         *l+=n+3;
1129
1130         return 1;
1131         }
1132
1133 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1134 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1135         {
1136         BUF_MEM *buf = s->init_buf;
1137         int no_chain;
1138         int i;
1139
1140         X509 *x;
1141         STACK_OF(X509) *extra_certs;
1142         X509_STORE *chain_store;
1143
1144         if (cpk)
1145                 x = cpk->x509;
1146         else
1147                 x = NULL;
1148
1149         if (s->cert->chain_store)
1150                 chain_store = s->cert->chain_store;
1151         else
1152                 chain_store = s->ctx->cert_store;
1153
1154         /* If we have a certificate specific chain use it, else use
1155          * parent ctx.
1156          */
1157         if (cpk && cpk->chain)
1158                 extra_certs = cpk->chain;
1159         else
1160                 extra_certs = s->ctx->extra_certs;
1161
1162         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1163                 no_chain = 1;
1164         else
1165                 no_chain = 0;
1166
1167         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1168         if (!BUF_MEM_grow_clean(buf,10))
1169                 {
1170                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1171                 return 0;
1172                 }
1173         if (x != NULL)
1174                 {
1175                 if (no_chain)
1176                         {
1177                         if (!ssl_add_cert_to_buf(buf, l, x))
1178                                 return 0;
1179                         }
1180                 else
1181                         {
1182                         X509_STORE_CTX xs_ctx;
1183
1184                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1185                                 {
1186                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1187                                 return(0);
1188                                 }
1189                         X509_verify_cert(&xs_ctx);
1190                         /* Don't leave errors in the queue */
1191                         ERR_clear_error();
1192                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1193                                 {
1194                                 x = sk_X509_value(xs_ctx.chain, i);
1195
1196                                 if (!ssl_add_cert_to_buf(buf, l, x))
1197                                         {
1198                                         X509_STORE_CTX_cleanup(&xs_ctx);
1199                                         return 0;
1200                                         }
1201                                 }
1202                         X509_STORE_CTX_cleanup(&xs_ctx);
1203                         }
1204                 }
1205         for (i=0; i<sk_X509_num(extra_certs); i++)
1206                 {
1207                 x=sk_X509_value(extra_certs,i);
1208                 if (!ssl_add_cert_to_buf(buf, l, x))
1209                         return 0;
1210                 }
1211
1212         return 1;
1213         }
1214
1215 /* Build a certificate chain for current certificate */
1216 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1217         {
1218         CERT_PKEY *cpk = c->key;
1219         X509_STORE_CTX xs_ctx;
1220         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1221         X509 *x;
1222         int i, rv = 0;
1223         unsigned long error;
1224
1225         if (!cpk->x509)
1226                 {
1227                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1228                 goto err;
1229                 }
1230         /* Rearranging and check the chain: add everything to a store */
1231         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1232                 {
1233                 chain_store = X509_STORE_new();
1234                 if (!chain_store)
1235                         goto err;
1236                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1237                         {
1238                         x = sk_X509_value(cpk->chain, i);
1239                         if (!X509_STORE_add_cert(chain_store, x))
1240                                 {
1241                                 error = ERR_peek_last_error();
1242                                 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1243                                     ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1244                                         goto err;
1245                                 ERR_clear_error();
1246                                 }
1247                         }
1248                 /* Add EE cert too: it might be self signed */
1249                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1250                         {
1251                         error = ERR_peek_last_error();
1252                         if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1253                             ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1254                                 goto err;
1255                         ERR_clear_error();
1256                         }
1257                 }
1258         else
1259                 {
1260                 if (c->chain_store)
1261                         chain_store = c->chain_store;
1262
1263                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1264                         untrusted = cpk->chain;
1265                 }
1266
1267         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1268                 {
1269                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1270                 goto err;
1271                 }
1272         /* Set suite B flags if needed */
1273         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1274
1275         i = X509_verify_cert(&xs_ctx);
1276         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1277                 {
1278                 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1279                         ERR_clear_error();
1280                 i = 1;
1281                 rv = 2;
1282                 }
1283         if (i > 0)
1284                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1285         if (i <= 0)
1286                 {
1287                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1288                 i = X509_STORE_CTX_get_error(&xs_ctx);
1289                 ERR_add_error_data(2, "Verify error:",
1290                                         X509_verify_cert_error_string(i));
1291
1292                 X509_STORE_CTX_cleanup(&xs_ctx);
1293                 goto err;
1294                 }
1295         X509_STORE_CTX_cleanup(&xs_ctx);
1296         if (cpk->chain)
1297                 sk_X509_pop_free(cpk->chain, X509_free);
1298         /* Remove EE certificate from chain */
1299         x = sk_X509_shift(chain);
1300         X509_free(x);
1301         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1302                 {
1303                 if (sk_X509_num(chain) > 0)
1304                         {
1305                         /* See if last cert is self signed */
1306                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1307                         X509_check_purpose(x, -1, 0);
1308                         if (x->ex_flags & EXFLAG_SS)
1309                                 {
1310                                 x = sk_X509_pop(chain);
1311                                 X509_free(x);
1312                                 }
1313                         }
1314                 }
1315         cpk->chain = chain;
1316         if (rv == 0)
1317                 rv = 1;
1318         err:
1319         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1320                 X509_STORE_free(chain_store);
1321
1322         return rv;
1323         }
1324
1325 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1326         {
1327         X509_STORE **pstore;
1328         if (chain)
1329                 pstore = &c->chain_store;
1330         else
1331                 pstore = &c->verify_store;
1332         if (*pstore)
1333                 X509_STORE_free(*pstore);
1334         *pstore = store;
1335         if (ref && store)
1336                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1337         return 1;
1338         }
1339