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 #ifndef OPENSSL_NO_TLSEXT
 438         if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
 439                 goto err;
 440         if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
 441                 goto err;
 442 #endif
 443
 444         return(ret);
 445
 446 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 447 err:
 448 #endif
 449 #ifndef OPENSSL_NO_RSA
 450         if (ret->rsa_tmp != NULL)
 451                 RSA_free(ret->rsa_tmp);
 452 #endif
 453 #ifndef OPENSSL_NO_DH
 454         if (ret->dh_tmp != NULL)
 455                 DH_free(ret->dh_tmp);
 456 #endif
 457 #ifndef OPENSSL_NO_ECDH
 458         if (ret->ecdh_tmp != NULL)
 459                 EC_KEY_free(ret->ecdh_tmp);
 460 #endif
 461
 462 #ifndef OPENSSL_NO_TLSEXT
 463         custom_exts_free(&ret->cli_ext);
 464         custom_exts_free(&ret->srv_ext);
 465 #endif
 466
 467         ssl_cert_clear_certs(ret);
 468
 469         return NULL;
 470         }
 471
 472 /* Free up and clear all certificates and chains */
 473
 474 void ssl_cert_clear_certs(CERT *c)
 475         {
 476         int i;
 477         if (c == NULL)
 478                 return;
 479         for (i = 0; i<SSL_PKEY_NUM; i++)
 480                 {
 481                 CERT_PKEY *cpk = c->pkeys + i;
 482                 if (cpk->x509)
 483                         {
 484                         X509_free(cpk->x509);
 485                         cpk->x509 = NULL;
 486                         }
 487                 if (cpk->privatekey)
 488                         {
 489                         EVP_PKEY_free(cpk->privatekey);
 490                         cpk->privatekey = NULL;
 491                         }
 492                 if (cpk->chain)
 493                         {
 494                         sk_X509_pop_free(cpk->chain, X509_free);
 495                         cpk->chain = NULL;
 496                         }
 497 #ifndef OPENSSL_NO_TLSEXT
 498                 if (cpk->serverinfo)
 499                         {
 500                         OPENSSL_free(cpk->serverinfo);
 501                         cpk->serverinfo = NULL;
 502                         cpk->serverinfo_length = 0;
 503                         }
 504 #endif
 505                 /* Clear all flags apart from explicit sign */
 506                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 507                 }
 508         }
 509
 510 void ssl_cert_free(CERT *c)
 511         {
 512         int i;
 513
 514         if(c == NULL)
 515             return;
 516
 517         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 518 #ifdef REF_PRINT
 519         REF_PRINT("CERT",c);
 520 #endif
 521         if (i > 0) return;
 522 #ifdef REF_CHECK
 523         if (i < 0)
 524                 {
 525                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 526                 abort(); /* ok */
 527                 }
 528 #endif
 529
 530 #ifndef OPENSSL_NO_RSA
 531         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 532 #endif
 533 #ifndef OPENSSL_NO_DH
 534         if (c->dh_tmp) DH_free(c->dh_tmp);
 535 #endif
 536 #ifndef OPENSSL_NO_ECDH
 537         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 538 #endif
 539
 540         ssl_cert_clear_certs(c);
 541         if (c->peer_sigalgs)
 542                 OPENSSL_free(c->peer_sigalgs);
 543         if (c->conf_sigalgs)
 544                 OPENSSL_free(c->conf_sigalgs);
 545         if (c->client_sigalgs)
 546                 OPENSSL_free(c->client_sigalgs);
 547         if (c->shared_sigalgs)
 548                 OPENSSL_free(c->shared_sigalgs);
 549         if (c->ctypes)
 550                 OPENSSL_free(c->ctypes);
 551         if (c->verify_store)
 552                 X509_STORE_free(c->verify_store);
 553         if (c->chain_store)
 554                 X509_STORE_free(c->chain_store);
 555         if (c->ciphers_raw)
 556                 OPENSSL_free(c->ciphers_raw);
 557 #ifndef OPENSSL_NO_TLSEXT
 558         custom_exts_free(&c->cli_ext);
 559         custom_exts_free(&c->srv_ext);
 560 #endif
 561         OPENSSL_free(c);
 562         }
 563
 564 int ssl_cert_inst(CERT **o)
 565         {
 566         /* Create a CERT if there isn't already one
 567          * (which cannot really happen, as it is initially created in
 568          * SSL_CTX_new; but the earlier code usually allows for that one
 569          * being non-existant, so we follow that behaviour, as it might
 570          * turn out that there actually is a reason for it -- but I'm
 571          * not sure that *all* of the existing code could cope with
 572          * s->cert being NULL, otherwise we could do without the
 573          * initialization in SSL_CTX_new).
 574          */
 575
 576         if (o == NULL)
 577                 {
 578                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 579                 return(0);
 580                 }
 581         if (*o == NULL)
 582                 {
 583                 if ((*o = ssl_cert_new()) == NULL)
 584                         {
 585                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 586                         return(0);
 587                         }
 588                 }
 589         return(1);
 590         }
 591
 592 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 593         {
 594         CERT_PKEY *cpk = c->key;
 595         if (!cpk)
 596                 return 0;
 597         if (cpk->chain)
 598                 sk_X509_pop_free(cpk->chain, X509_free);
 599         cpk->chain = chain;
 600         return 1;
 601         }
 602
 603 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 604         {
 605         STACK_OF(X509) *dchain;
 606         if (!chain)
 607                 return ssl_cert_set0_chain(c, NULL);
 608         dchain = X509_chain_up_ref(chain);
 609         if (!dchain)
 610                 return 0;
 611         if (!ssl_cert_set0_chain(c, dchain))
 612                 {
 613                 sk_X509_pop_free(dchain, X509_free);
 614                 return 0;
 615                 }
 616         return 1;
 617         }
 618
 619 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 620         {
 621         CERT_PKEY *cpk = c->key;
 622         if (!cpk)
 623                 return 0;
 624         if (!cpk->chain)
 625                 cpk->chain = sk_X509_new_null();
 626         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 627                 return 0;
 628         return 1;
 629         }
 630
 631 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 632         {
 633         if (!ssl_cert_add0_chain_cert(c, x))
 634                 return 0;
 635         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 636         return 1;
 637         }
 638
 639 int ssl_cert_select_current(CERT *c, X509 *x)
 640         {
 641         int i;
 642         if (x == NULL)
 643                 return 0;
 644         for (i = 0; i < SSL_PKEY_NUM; i++)
 645                 {
 646                 CERT_PKEY *cpk = c->pkeys + i;
 647                 if (cpk->x509 == x && cpk->privatekey)
 648                         {
 649                         c->key = cpk;
 650                         return 1;
 651                         }
 652                 }
 653
 654         for (i = 0; i < SSL_PKEY_NUM; i++)
 655                 {
 656                 CERT_PKEY *cpk = c->pkeys + i;
 657                 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
 658                         {
 659                         c->key = cpk;
 660                         return 1;
 661                         }
 662                 }
 663         return 0;
 664         }
 665
 666 int ssl_cert_set_current(CERT *c, long op)
 667         {
 668         int i, idx;
 669         if (!c)
 670                 return 0;
 671         if (op == SSL_CERT_SET_FIRST)
 672                 idx = 0;
 673         else if (op == SSL_CERT_SET_NEXT)
 674                 {
 675                 idx = (int)(c->key - c->pkeys + 1);
 676                 if (idx >= SSL_PKEY_NUM)
 677                         return 0;
 678                 }
 679         else
 680                 return 0;
 681         for (i = idx; i < SSL_PKEY_NUM; i++)
 682                 {
 683                 CERT_PKEY *cpk = c->pkeys + i;
 684                 if (cpk->x509 && cpk->privatekey)
 685                         {
 686                         c->key = cpk;
 687                         return 1;
 688                         }
 689                 }
 690         return 0;
 691         }
 692
 693 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 694         {
 695         c->cert_cb = cb;
 696         c->cert_cb_arg = arg;
 697         }
 698
 699 SESS_CERT *ssl_sess_cert_new(void)
 700         {
 701         SESS_CERT *ret;
 702
 703         ret = OPENSSL_malloc(sizeof *ret);
 704         if (ret == NULL)
 705                 {
 706                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 707                 return NULL;
 708                 }
 709
 710         memset(ret, 0 ,sizeof *ret);
 711         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 712         ret->references = 1;
 713
 714         return ret;
 715         }
 716
 717 void ssl_sess_cert_free(SESS_CERT *sc)
 718         {
 719         int i;
 720
 721         if (sc == NULL)
 722                 return;
 723
 724         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 725 #ifdef REF_PRINT
 726         REF_PRINT("SESS_CERT", sc);
 727 #endif
 728         if (i > 0)
 729                 return;
 730 #ifdef REF_CHECK
 731         if (i < 0)
 732                 {
 733                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 734                 abort(); /* ok */
 735                 }
 736 #endif
 737
 738         /* i == 0 */
 739         if (sc->cert_chain != NULL)
 740                 sk_X509_pop_free(sc->cert_chain, X509_free);
 741         for (i = 0; i < SSL_PKEY_NUM; i++)
 742                 {
 743                 if (sc->peer_pkeys[i].x509 != NULL)
 744                         X509_free(sc->peer_pkeys[i].x509);
 745 #if 0 /* We don't have the peer's private key.  These lines are just
 746            * here as a reminder that we're still using a not-quite-appropriate
 747            * data structure. */
 748                 if (sc->peer_pkeys[i].privatekey != NULL)
 749                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 750 #endif
 751                 }
 752
 753 #ifndef OPENSSL_NO_RSA
 754         if (sc->peer_rsa_tmp != NULL)
 755                 RSA_free(sc->peer_rsa_tmp);
 756 #endif
 757 #ifndef OPENSSL_NO_DH
 758         if (sc->peer_dh_tmp != NULL)
 759                 DH_free(sc->peer_dh_tmp);
 760 #endif
 761 #ifndef OPENSSL_NO_ECDH
 762         if (sc->peer_ecdh_tmp != NULL)
 763                 EC_KEY_free(sc->peer_ecdh_tmp);
 764 #endif
 765
 766         OPENSSL_free(sc);
 767         }
 768
 769 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 770         {
 771         sc->peer_cert_type = type;
 772         return(1);
 773         }
 774
 775 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 776         {
 777         X509 *x;
 778         int i;
 779         X509_STORE *verify_store;
 780         X509_STORE_CTX ctx;
 781
 782         if (s->cert->verify_store)
 783                 verify_store = s->cert->verify_store;
 784         else
 785                 verify_store = s->ctx->cert_store;
 786
 787         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 788                 return(0);
 789
 790         x=sk_X509_value(sk,0);
 791         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 792                 {
 793                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 794                 return(0);
 795                 }
 796         /* Set suite B flags if needed */
 797         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 798 #if 0
 799         if (SSL_get_verify_depth(s) >= 0)
 800                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 801 #endif
 802         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 803
 804         /* We need to inherit the verify parameters. These can be determined by
 805          * the context: if its a server it will verify SSL client certificates
 806          * or vice versa.
 807          */
 808
 809         X509_STORE_CTX_set_default(&ctx,
 810                                 s->server ? "ssl_client" : "ssl_server");
 811         /* Anything non-default in "param" should overwrite anything in the
 812          * ctx.
 813          */
 814         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 815
 816         if (s->verify_callback)
 817                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 818
 819         if (s->ctx->app_verify_callback != NULL)
 820 #if 1 /* new with OpenSSL 0.9.7 */
 821                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 822 #else
 823                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 824 #endif
 825         else
 826                 {
 827 #ifndef OPENSSL_NO_X509_VERIFY
 828                 i=X509_verify_cert(&ctx);
 829 #else
 830                 i=0;
 831                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 832                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 833 #endif
 834                 }
 835
 836         s->verify_result=ctx.error;
 837         X509_STORE_CTX_cleanup(&ctx);
 838
 839         return(i);
 840         }
 841
 842 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 843         {
 844         if (*ca_list != NULL)
 845                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 846
 847         *ca_list=name_list;
 848         }
 849
 850 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 851         {
 852         int i;
 853         STACK_OF(X509_NAME) *ret;
 854         X509_NAME *name;
 855
 856         ret=sk_X509_NAME_new_null();
 857         for (i=0; i<sk_X509_NAME_num(sk); i++)
 858                 {
 859                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 860                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 861                         {
 862                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 863                         return(NULL);
 864                         }
 865                 }
 866         return(ret);
 867         }
 868
 869 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 870         {
 871         set_client_CA_list(&(s->client_CA),name_list);
 872         }
 873
 874 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 875         {
 876         set_client_CA_list(&(ctx->client_CA),name_list);
 877         }
 878
 879 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 880         {
 881         return(ctx->client_CA);
 882         }
 883
 884 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 885         {
 886         if (s->type == SSL_ST_CONNECT)
 887                 { /* we are in the client */
 888                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 889                         (s->s3 != NULL))
 890                         return(s->s3->tmp.ca_names);
 891                 else
 892                         return(NULL);
 893                 }
 894         else
 895                 {
 896                 if (s->client_CA != NULL)
 897                         return(s->client_CA);
 898                 else
 899                         return(s->ctx->client_CA);
 900                 }
 901         }
 902
 903 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 904         {
 905         X509_NAME *name;
 906
 907         if (x == NULL) return(0);
 908         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 909                 return(0);
 910
 911         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 912                 return(0);
 913
 914         if (!sk_X509_NAME_push(*sk,name))
 915                 {
 916                 X509_NAME_free(name);
 917                 return(0);
 918                 }
 919         return(1);
 920         }
 921
 922 int SSL_add_client_CA(SSL *ssl,X509 *x)
 923         {
 924         return(add_client_CA(&(ssl->client_CA),x));
 925         }
 926
 927 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 928         {
 929         return(add_client_CA(&(ctx->client_CA),x));
 930         }
 931
 932 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 933         {
 934         return(X509_NAME_cmp(*a,*b));
 935         }
 936
 937 #ifndef OPENSSL_NO_STDIO
 938 /*!
 939  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 940  * it doesn't really have anything to do with clients (except that a common use
 941  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 942  * much to do with CAs, either, since it will load any old cert.
 943  * \param file the file containing one or more certs.
 944  * \return a ::STACK containing the certs.
 945  */
 946 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 947         {
 948         BIO *in;
 949         X509 *x=NULL;
 950         X509_NAME *xn=NULL;
 951         STACK_OF(X509_NAME) *ret = NULL,*sk;
 952
 953         sk=sk_X509_NAME_new(xname_cmp);
 954
 955         in=BIO_new(BIO_s_file_internal());
 956
 957         if ((sk == NULL) || (in == NULL))
 958                 {
 959                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 960                 goto err;
 961                 }
 962
 963         if (!BIO_read_filename(in,file))
 964                 goto err;
 965
 966         for (;;)
 967                 {
 968                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 969                         break;
 970                 if (ret == NULL)
 971                         {
 972                         ret = sk_X509_NAME_new_null();
 973                         if (ret == NULL)
 974                                 {
 975                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 976                                 goto err;
 977                                 }
 978                         }
 979                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 980                 /* check for duplicates */
 981                 xn=X509_NAME_dup(xn);
 982                 if (xn == NULL) goto err;
 983                 if (sk_X509_NAME_find(sk,xn) >= 0)
 984                         X509_NAME_free(xn);
 985                 else
 986                         {
 987                         sk_X509_NAME_push(sk,xn);
 988                         sk_X509_NAME_push(ret,xn);
 989                         }
 990                 }
 991
 992         if (0)
 993                 {
 994 err:
 995                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 996                 ret=NULL;
 997                 }
 998         if (sk != NULL) sk_X509_NAME_free(sk);
 999         if (in != NULL) BIO_free(in);
1000         if (x != NULL) X509_free(x);
1001         if (ret != NULL)
1002                 ERR_clear_error();
1003         return(ret);
1004         }
1005 #endif
1006
1007 /*!
1008  * Add a file of certs to a stack.
1009  * \param stack the stack to add to.
1010  * \param file the file to add from. All certs in this file that are not
1011  * already in the stack will be added.
1012  * \return 1 for success, 0 for failure. Note that in the case of failure some
1013  * certs may have been added to \c stack.
1014  */
1015
1016 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1017                                         const char *file)
1018         {
1019         BIO *in;
1020         X509 *x=NULL;
1021         X509_NAME *xn=NULL;
1022         int ret=1;
1023         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1024
1025         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1026
1027         in=BIO_new(BIO_s_file_internal());
1028
1029         if (in == NULL)
1030                 {
1031                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1032                 goto err;
1033                 }
1034
1035         if (!BIO_read_filename(in,file))
1036                 goto err;
1037
1038         for (;;)
1039                 {
1040                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1041                         break;
1042                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1043                 xn=X509_NAME_dup(xn);
1044                 if (xn == NULL) goto err;
1045                 if (sk_X509_NAME_find(stack,xn) >= 0)
1046                         X509_NAME_free(xn);
1047                 else
1048                         sk_X509_NAME_push(stack,xn);
1049                 }
1050
1051         ERR_clear_error();
1052
1053         if (0)
1054                 {
1055 err:
1056                 ret=0;
1057                 }
1058         if(in != NULL)
1059                 BIO_free(in);
1060         if(x != NULL)
1061                 X509_free(x);
1062
1063         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1064
1065         return ret;
1066         }
1067
1068 /*!
1069  * Add a directory of certs to a stack.
1070  * \param stack the stack to append to.
1071  * \param dir the directory to append from. All files in this directory will be
1072  * examined as potential certs. Any that are acceptable to
1073  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1074  * included.
1075  * \return 1 for success, 0 for failure. Note that in the case of failure some
1076  * certs may have been added to \c stack.
1077  */
1078
1079 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1080                                        const char *dir)
1081         {
1082         OPENSSL_DIR_CTX *d = NULL;
1083         const char *filename;
1084         int ret = 0;
1085
1086         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1087
1088         /* Note that a side effect is that the CAs will be sorted by name */
1089
1090         while((filename = OPENSSL_DIR_read(&d, dir)))
1091                 {
1092                 char buf[1024];
1093                 int r;
1094
1095                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1096                         {
1097                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1098                         goto err;
1099                         }
1100
1101 #ifdef OPENSSL_SYS_VMS
1102                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1103 #else
1104                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1105 #endif
1106                 if (r <= 0 || r >= (int)sizeof(buf))
1107                         goto err;
1108                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1109                         goto err;
1110                 }
1111
1112         if (errno)
1113                 {
1114                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1115                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1116                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1117                 goto err;
1118                 }
1119
1120         ret = 1;
1121
1122 err:
1123         if (d) OPENSSL_DIR_end(&d);
1124         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1125         return ret;
1126         }
1127
1128 /* Add a certificate to a BUF_MEM structure */
1129
1130 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1131         {
1132         int n;
1133         unsigned char *p;
1134
1135         n=i2d_X509(x,NULL);
1136         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1137                 {
1138                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1139                 return 0;
1140                 }
1141         p=(unsigned char *)&(buf->data[*l]);
1142         l2n3(n,p);
1143         i2d_X509(x,&p);
1144         *l+=n+3;
1145
1146         return 1;
1147         }
1148
1149 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1150 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1151         {
1152         BUF_MEM *buf = s->init_buf;
1153         int no_chain;
1154         int i;
1155
1156         X509 *x;
1157         STACK_OF(X509) *extra_certs;
1158         X509_STORE *chain_store;
1159
1160         if (cpk)
1161                 x = cpk->x509;
1162         else
1163                 x = NULL;
1164
1165         if (s->cert->chain_store)
1166                 chain_store = s->cert->chain_store;
1167         else
1168                 chain_store = s->ctx->cert_store;
1169
1170         /* If we have a certificate specific chain use it, else use
1171          * parent ctx.
1172          */
1173         if (cpk && cpk->chain)
1174                 extra_certs = cpk->chain;
1175         else
1176                 extra_certs = s->ctx->extra_certs;
1177
1178         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1179                 no_chain = 1;
1180         else
1181                 no_chain = 0;
1182
1183         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1184         if (!BUF_MEM_grow_clean(buf,10))
1185                 {
1186                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1187                 return 0;
1188                 }
1189         if (x != NULL)
1190                 {
1191                 if (no_chain)
1192                         {
1193                         if (!ssl_add_cert_to_buf(buf, l, x))
1194                                 return 0;
1195                         }
1196                 else
1197                         {
1198                         X509_STORE_CTX xs_ctx;
1199
1200                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1201                                 {
1202                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1203                                 return(0);
1204                                 }
1205                         X509_verify_cert(&xs_ctx);
1206                         /* Don't leave errors in the queue */
1207                         ERR_clear_error();
1208                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1209                                 {
1210                                 x = sk_X509_value(xs_ctx.chain, i);
1211
1212                                 if (!ssl_add_cert_to_buf(buf, l, x))
1213                                         {
1214                                         X509_STORE_CTX_cleanup(&xs_ctx);
1215                                         return 0;
1216                                         }
1217                                 }
1218                         X509_STORE_CTX_cleanup(&xs_ctx);
1219                         }
1220                 }
1221         for (i=0; i<sk_X509_num(extra_certs); i++)
1222                 {
1223                 x=sk_X509_value(extra_certs,i);
1224                 if (!ssl_add_cert_to_buf(buf, l, x))
1225                         return 0;
1226                 }
1227
1228         return 1;
1229         }
1230
1231 /* Build a certificate chain for current certificate */
1232 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1233         {
1234         CERT_PKEY *cpk = c->key;
1235         X509_STORE_CTX xs_ctx;
1236         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1237         X509 *x;
1238         int i, rv = 0;
1239         unsigned long error;
1240
1241         if (!cpk->x509)
1242                 {
1243                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1244                 goto err;
1245                 }
1246         /* Rearranging and check the chain: add everything to a store */
1247         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1248                 {
1249                 chain_store = X509_STORE_new();
1250                 if (!chain_store)
1251                         goto err;
1252                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1253                         {
1254                         x = sk_X509_value(cpk->chain, i);
1255                         if (!X509_STORE_add_cert(chain_store, x))
1256                                 {
1257                                 error = ERR_peek_last_error();
1258                                 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1259                                     ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1260                                         goto err;
1261                                 ERR_clear_error();
1262                                 }
1263                         }
1264                 /* Add EE cert too: it might be self signed */
1265                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1266                         {
1267                         error = ERR_peek_last_error();
1268                         if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1269                             ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1270                                 goto err;
1271                         ERR_clear_error();
1272                         }
1273                 }
1274         else
1275                 {
1276                 if (c->chain_store)
1277                         chain_store = c->chain_store;
1278
1279                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1280                         untrusted = cpk->chain;
1281                 }
1282
1283         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1284                 {
1285                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1286                 goto err;
1287                 }
1288         /* Set suite B flags if needed */
1289         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1290
1291         i = X509_verify_cert(&xs_ctx);
1292         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1293                 {
1294                 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1295                         ERR_clear_error();
1296                 i = 1;
1297                 rv = 2;
1298                 }
1299         if (i > 0)
1300                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1301         if (i <= 0)
1302                 {
1303                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1304                 i = X509_STORE_CTX_get_error(&xs_ctx);
1305                 ERR_add_error_data(2, "Verify error:",
1306                                         X509_verify_cert_error_string(i));
1307
1308                 X509_STORE_CTX_cleanup(&xs_ctx);
1309                 goto err;
1310                 }
1311         X509_STORE_CTX_cleanup(&xs_ctx);
1312         if (cpk->chain)
1313                 sk_X509_pop_free(cpk->chain, X509_free);
1314         /* Remove EE certificate from chain */
1315         x = sk_X509_shift(chain);
1316         X509_free(x);
1317         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1318                 {
1319                 if (sk_X509_num(chain) > 0)
1320                         {
1321                         /* See if last cert is self signed */
1322                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1323                         X509_check_purpose(x, -1, 0);
1324                         if (x->ex_flags & EXFLAG_SS)
1325                                 {
1326                                 x = sk_X509_pop(chain);
1327                                 X509_free(x);
1328                                 }
1329                         }
1330                 }
1331         cpk->chain = chain;
1332         if (rv == 0)
1333                 rv = 1;
1334         err:
1335         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1336                 X509_STORE_free(chain_store);
1337
1338         return rv;
1339         }
1340
1341 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1342         {
1343         X509_STORE **pstore;
1344         if (chain)
1345                 pstore = &c->chain_store;
1346         else
1347                 pstore = &c->verify_store;
1348         if (*pstore)
1349                 X509_STORE_free(*pstore);
1350         *pstore = store;
1351         if (ref && store)
1352                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1353         return 1;
1354         }
1355