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