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 #endif
 261
 262 #ifndef OPENSSL_NO_ECDH
 263         if (cert->ecdh_tmp)
 264                 {
 265                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 266                 if (ret->ecdh_tmp == NULL)
 267                         {
 268                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 269                         goto err;
 270                         }
 271                 }
 272         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 273         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 274 #endif
 275
 276         for (i = 0; i < SSL_PKEY_NUM; i++)
 277                 {
 278                 CERT_PKEY *cpk = cert->pkeys + i;
 279                 CERT_PKEY *rpk = ret->pkeys + i;
 280                 if (cpk->x509 != NULL)
 281                         {
 282                         rpk->x509 = cpk->x509;
 283                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 284                         }
 285
 286                 if (cpk->privatekey != NULL)
 287                         {
 288                         rpk->privatekey = cpk->privatekey;
 289                         CRYPTO_add(&cpk->privatekey->references, 1,
 290                                 CRYPTO_LOCK_EVP_PKEY);
 291
 292                         switch(i)
 293                                 {
 294                                 /* If there was anything special to do for
 295                                  * certain types of keys, we'd do it here.
 296                                  * (Nothing at the moment, I think.) */
 297
 298                         case SSL_PKEY_RSA_ENC:
 299                         case SSL_PKEY_RSA_SIGN:
 300                                 /* We have an RSA key. */
 301                                 break;
 302
 303                         case SSL_PKEY_DSA_SIGN:
 304                                 /* We have a DSA key. */
 305                                 break;
 306
 307                         case SSL_PKEY_DH_RSA:
 308                         case SSL_PKEY_DH_DSA:
 309                                 /* We have a DH key. */
 310                                 break;
 311
 312                         case SSL_PKEY_ECC:
 313                                 /* We have an ECC key */
 314                                 break;
 315
 316                         default:
 317                                 /* Can't happen. */
 318                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 319                                 }
 320                         }
 321
 322                 if (cpk->chain)
 323                         {
 324                         rpk->chain = X509_chain_up_ref(cpk->chain);
 325                         if (!rpk->chain)
 326                                 {
 327                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 328                                 goto err;
 329                                 }
 330                         }
 331                 rpk->valid_flags = 0;
 332                 if (cert->pkeys[i].authz != NULL)
 333                         {
 334                         /* Just copy everything. */
 335                         ret->pkeys[i].authz_length =
 336                                 cert->pkeys[i].authz_length;
 337                         ret->pkeys[i].authz =
 338                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
 339                         if (ret->pkeys[i].authz == NULL)
 340                                 {
 341                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 342                                 return(NULL);
 343                                 }
 344                         memcpy(ret->pkeys[i].authz,
 345                                cert->pkeys[i].authz,
 346                                cert->pkeys[i].authz_length);
 347                         }
 348                 }
 349
 350         ret->references=1;
 351         /* Set digests to defaults. NB: we don't copy existing values as they
 352          * will be set during handshake.
 353          */
 354         ssl_cert_set_default_md(ret);
 355         /* Peer sigalgs set to NULL as we get these from handshake too */
 356         ret->peer_sigalgs = NULL;
 357         ret->peer_sigalgslen = 0;
 358         /* Configured sigalgs however we copy across */
 359
 360         if (cert->conf_sigalgs)
 361                 {
 362                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 363                 if (!ret->conf_sigalgs)
 364                         goto err;
 365                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 366                                                 cert->conf_sigalgslen);
 367                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 368                 }
 369         else
 370                 ret->conf_sigalgs = NULL;
 371
 372         if (cert->client_sigalgs)
 373                 {
 374                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 375                 if (!ret->client_sigalgs)
 376                         goto err;
 377                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 378                                                 cert->client_sigalgslen);
 379                 ret->client_sigalgslen = cert->client_sigalgslen;
 380                 }
 381         else
 382                 ret->client_sigalgs = NULL;
 383         /* Shared sigalgs also NULL */
 384         ret->shared_sigalgs = NULL;
 385         /* Copy any custom client certificate types */
 386         if (cert->ctypes)
 387                 {
 388                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 389                 if (!ret->ctypes)
 390                         goto err;
 391                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 392                 ret->ctype_num = cert->ctype_num;
 393                 }
 394
 395         ret->cert_flags = cert->cert_flags;
 396
 397         ret->cert_cb = cert->cert_cb;
 398         ret->cert_cb_arg = cert->cert_cb_arg;
 399
 400         if (cert->verify_store)
 401                 {
 402                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 403                 ret->verify_store = cert->verify_store;
 404                 }
 405
 406         if (cert->chain_store)
 407                 {
 408                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 409                 ret->chain_store = cert->chain_store;
 410                 }
 411
 412         ret->ciphers_raw = NULL;
 413
 414         return(ret);
 415
 416 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 417 err:
 418 #endif
 419 #ifndef OPENSSL_NO_RSA
 420         if (ret->rsa_tmp != NULL)
 421                 RSA_free(ret->rsa_tmp);
 422 #endif
 423 #ifndef OPENSSL_NO_DH
 424         if (ret->dh_tmp != NULL)
 425                 DH_free(ret->dh_tmp);
 426 #endif
 427 #ifndef OPENSSL_NO_ECDH
 428         if (ret->ecdh_tmp != NULL)
 429                 EC_KEY_free(ret->ecdh_tmp);
 430 #endif
 431
 432         ssl_cert_clear_certs(ret);
 433
 434         return NULL;
 435         }
 436
 437 /* Free up and clear all certificates and chains */
 438
 439 void ssl_cert_clear_certs(CERT *c)
 440         {
 441         int i;
 442         if (c == NULL)
 443                 return;
 444         for (i = 0; i<SSL_PKEY_NUM; i++)
 445                 {
 446                 CERT_PKEY *cpk = c->pkeys + i;
 447                 if (cpk->x509)
 448                         {
 449                         X509_free(cpk->x509);
 450                         cpk->x509 = NULL;
 451                         }
 452                 if (cpk->privatekey)
 453                         {
 454                         EVP_PKEY_free(cpk->privatekey);
 455                         cpk->privatekey = NULL;
 456                         }
 457                 if (cpk->chain)
 458                         {
 459                         sk_X509_pop_free(cpk->chain, X509_free);
 460                         cpk->chain = NULL;
 461                         }
 462 #ifndef OPENSSL_NO_TLSEXT
 463                 if (cpk->authz != NULL)
 464                         OPENSSL_free(cpk->authz);
 465 #endif
 466                 /* Clear all flags apart from explicit sign */
 467                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 468                 }
 469         }
 470
 471 void ssl_cert_free(CERT *c)
 472         {
 473         int i;
 474
 475         if(c == NULL)
 476             return;
 477
 478         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 479 #ifdef REF_PRINT
 480         REF_PRINT("CERT",c);
 481 #endif
 482         if (i > 0) return;
 483 #ifdef REF_CHECK
 484         if (i < 0)
 485                 {
 486                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 487                 abort(); /* ok */
 488                 }
 489 #endif
 490
 491 #ifndef OPENSSL_NO_RSA
 492         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 493 #endif
 494 #ifndef OPENSSL_NO_DH
 495         if (c->dh_tmp) DH_free(c->dh_tmp);
 496 #endif
 497 #ifndef OPENSSL_NO_ECDH
 498         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 499 #endif
 500
 501         ssl_cert_clear_certs(c);
 502         if (c->peer_sigalgs)
 503                 OPENSSL_free(c->peer_sigalgs);
 504         if (c->conf_sigalgs)
 505                 OPENSSL_free(c->conf_sigalgs);
 506         if (c->client_sigalgs)
 507                 OPENSSL_free(c->client_sigalgs);
 508         if (c->shared_sigalgs)
 509                 OPENSSL_free(c->shared_sigalgs);
 510         if (c->ctypes)
 511                 OPENSSL_free(c->ctypes);
 512         if (c->verify_store)
 513                 X509_STORE_free(c->verify_store);
 514         if (c->chain_store)
 515                 X509_STORE_free(c->chain_store);
 516         if (c->ciphers_raw)
 517                 OPENSSL_free(c->ciphers_raw);
 518         OPENSSL_free(c);
 519         }
 520
 521 int ssl_cert_inst(CERT **o)
 522         {
 523         /* Create a CERT if there isn't already one
 524          * (which cannot really happen, as it is initially created in
 525          * SSL_CTX_new; but the earlier code usually allows for that one
 526          * being non-existant, so we follow that behaviour, as it might
 527          * turn out that there actually is a reason for it -- but I'm
 528          * not sure that *all* of the existing code could cope with
 529          * s->cert being NULL, otherwise we could do without the
 530          * initialization in SSL_CTX_new).
 531          */
 532
 533         if (o == NULL)
 534                 {
 535                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 536                 return(0);
 537                 }
 538         if (*o == NULL)
 539                 {
 540                 if ((*o = ssl_cert_new()) == NULL)
 541                         {
 542                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 543                         return(0);
 544                         }
 545                 }
 546         return(1);
 547         }
 548
 549 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 550         {
 551         CERT_PKEY *cpk = c->key;
 552         if (!cpk)
 553                 return 0;
 554         if (cpk->chain)
 555                 sk_X509_pop_free(cpk->chain, X509_free);
 556         cpk->chain = chain;
 557         return 1;
 558         }
 559
 560 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 561         {
 562         STACK_OF(X509) *dchain;
 563         if (!chain)
 564                 return ssl_cert_set0_chain(c, NULL);
 565         dchain = X509_chain_up_ref(chain);
 566         if (!dchain)
 567                 return 0;
 568         if (!ssl_cert_set0_chain(c, dchain))
 569                 {
 570                 sk_X509_pop_free(dchain, X509_free);
 571                 return 0;
 572                 }
 573         return 1;
 574         }
 575
 576 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 577         {
 578         CERT_PKEY *cpk = c->key;
 579         if (!cpk)
 580                 return 0;
 581         if (!cpk->chain)
 582                 cpk->chain = sk_X509_new_null();
 583         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 584                 return 0;
 585         return 1;
 586         }
 587
 588 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 589         {
 590         if (!ssl_cert_add0_chain_cert(c, x))
 591                 return 0;
 592         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 593         return 1;
 594         }
 595
 596 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 597         {
 598         c->cert_cb = cb;
 599         c->cert_cb_arg = arg;
 600         }
 601
 602 SESS_CERT *ssl_sess_cert_new(void)
 603         {
 604         SESS_CERT *ret;
 605
 606         ret = OPENSSL_malloc(sizeof *ret);
 607         if (ret == NULL)
 608                 {
 609                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 610                 return NULL;
 611                 }
 612
 613         memset(ret, 0 ,sizeof *ret);
 614         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 615         ret->references = 1;
 616
 617         return ret;
 618         }
 619
 620 void ssl_sess_cert_free(SESS_CERT *sc)
 621         {
 622         int i;
 623
 624         if (sc == NULL)
 625                 return;
 626
 627         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 628 #ifdef REF_PRINT
 629         REF_PRINT("SESS_CERT", sc);
 630 #endif
 631         if (i > 0)
 632                 return;
 633 #ifdef REF_CHECK
 634         if (i < 0)
 635                 {
 636                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 637                 abort(); /* ok */
 638                 }
 639 #endif
 640
 641         /* i == 0 */
 642         if (sc->cert_chain != NULL)
 643                 sk_X509_pop_free(sc->cert_chain, X509_free);
 644         for (i = 0; i < SSL_PKEY_NUM; i++)
 645                 {
 646                 if (sc->peer_pkeys[i].x509 != NULL)
 647                         X509_free(sc->peer_pkeys[i].x509);
 648 #if 0 /* We don't have the peer's private key.  These lines are just
 649            * here as a reminder that we're still using a not-quite-appropriate
 650            * data structure. */
 651                 if (sc->peer_pkeys[i].privatekey != NULL)
 652                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 653 #endif
 654                 }
 655
 656 #ifndef OPENSSL_NO_RSA
 657         if (sc->peer_rsa_tmp != NULL)
 658                 RSA_free(sc->peer_rsa_tmp);
 659 #endif
 660 #ifndef OPENSSL_NO_DH
 661         if (sc->peer_dh_tmp != NULL)
 662                 DH_free(sc->peer_dh_tmp);
 663 #endif
 664 #ifndef OPENSSL_NO_ECDH
 665         if (sc->peer_ecdh_tmp != NULL)
 666                 EC_KEY_free(sc->peer_ecdh_tmp);
 667 #endif
 668
 669         OPENSSL_free(sc);
 670         }
 671
 672 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 673         {
 674         sc->peer_cert_type = type;
 675         return(1);
 676         }
 677
 678 #ifndef OPENSSL_NO_DANE
 679 /*
 680  * return value:
 681  * -1:  format or digest error
 682  *  0:  match
 683  *  1:  no match
 684  */
 685 int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record, unsigned int reclen)
 686 {
 687         const EVP_MD *md;
 688         unsigned char digest[EVP_MAX_MD_SIZE];
 689         unsigned int len, selector, matching_type;
 690         int ret;
 691
 692         if (reclen<3) return -1;
 693
 694         selector      = tlsa_record[1];
 695         matching_type = tlsa_record[2];
 696         tlsa_record   += 3;
 697         reclen        -= 3;
 698
 699         switch (matching_type) {
 700         case 0:                         /* exact match */
 701                 if (selector==0) {      /* full certificate */
 702                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 703                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 704                 }
 705                 else if (selector==1) { /* SubjectPublicKeyInfo */
 706                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 707
 708                         if (key == NULL) return -1;
 709                         if (key->length != reclen) return 1;
 710
 711                         return memcmp(key->data,tlsa_record,reclen)!=0;
 712                 }
 713                 return -1;
 714
 715         case 1:                         /* SHA256 */
 716         case 2:                         /* SHA512 */
 717                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 718
 719                 if (reclen!=EVP_MD_size(md)) return -1;
 720
 721                 if (selector==0) {      /* full certificate */
 722                         ret = X509_digest(cert,md,digest,&len);
 723                 }
 724                 else if (selector==1) { /* SubjectPublicKeyInfo */
 725                         ret = X509_pubkey_digest(cert,md,digest,&len);
 726                 }
 727                 else
 728                         return -1;
 729
 730                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 731         default:
 732                 return -1;
 733         }
 734 }
 735
 736 int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 737 {
 738         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 739         int depth=X509_STORE_CTX_get_error_depth(ctx);
 740         X509 *cert = sk_X509_value(ctx->chain,depth);
 741         unsigned int reclen, certificate_usage, witness_usage=0x100;
 742         const unsigned char *tlsa_record = s->tlsa_record;
 743         int tlsa_ret = -1;
 744
 745         if (s->verify_callback) ok = s->verify_callback(ok,ctx);
 746
 747         if (tlsa_record == NULL) return ok;
 748
 749         if (tlsa_record == (void*)-1) {
 750                 ctx->error = X509_V_ERR_INVALID_CA;     /* temporary code? */
 751                 return 0;
 752         }
 753
 754         while ((reclen = *(unsigned int *)tlsa_record)) {
 755                 tlsa_record += sizeof(unsigned int);
 756
 757                 /*
 758                  * tlsa_record[0]       Certificate Usage field
 759                  * tlsa_record[1]       Selector field
 760                  * tlsa_record[2]       Matching Type Field
 761                  * tlsa_record+3        Certificate Association data
 762                  */
 763                 certificate_usage = tlsa_record[0];
 764
 765                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 766                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 767                         if (tlsa_ret==0) {
 768                                 s->tlsa_witness = depth<<8|certificate_usage;
 769                                 break;
 770                         }
 771                         else if (tlsa_ret==-1)
 772                                 s->tlsa_witness = -1;   /* something phishy? */
 773                 }
 774
 775                 tlsa_record += reclen;
 776         }
 777
 778         if (depth==0) {
 779                 switch (s->tlsa_witness&0xff) {         /* witnessed usage */
 780                 case 0: /* CA constraint */
 781                         if (s->tlsa_witness<0 && ctx->error==X509_V_OK)
 782                                 ctx->error = X509_V_ERR_INVALID_CA;
 783                         return 0;
 784                 case 1: /* service certificate constraint */
 785                         if (tlsa_ret!=0 && ctx->error==X509_V_OK)
 786                                 ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 787                         return 0;
 788                 case 2: /* trust anchor assertion */
 789                         if ((s->tlsa_witness>>8)>0 && ctx->error==X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY)
 790                                 ctx->error = X509_V_OK;
 791                         break;
 792                 case 3: /* domain-issued certificate */
 793                         if (tlsa_ret==0)
 794                                 ctx->error = X509_V_OK; /* override all errors? */
 795                         break;
 796                 default:/* there were TLSA records, but something phishy happened */
 797                         ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 798                         return ok;
 799                 }
 800         }
 801
 802         /*
 803          * returning 1 makes verify procedure traverse the whole chain,
 804          * not actually approve it...
 805          */
 806         return 1;
 807 }
 808 #endif
 809
 810 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 811         {
 812         X509 *x;
 813         int i;
 814         X509_STORE *verify_store;
 815         X509_STORE_CTX ctx;
 816
 817         if (s->cert->verify_store)
 818                 verify_store = s->cert->verify_store;
 819         else
 820                 verify_store = s->ctx->cert_store;
 821
 822         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 823                 return(0);
 824
 825         x=sk_X509_value(sk,0);
 826         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 827                 {
 828                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 829                 return(0);
 830                 }
 831         /* Set suite B flags if needed */
 832         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 833 #if 0
 834         if (SSL_get_verify_depth(s) >= 0)
 835                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 836 #endif
 837         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 838
 839         /* We need to inherit the verify parameters. These can be determined by
 840          * the context: if its a server it will verify SSL client certificates
 841          * or vice versa.
 842          */
 843
 844         X509_STORE_CTX_set_default(&ctx,
 845                                 s->server ? "ssl_client" : "ssl_server");
 846         /* Anything non-default in "param" should overwrite anything in the
 847          * ctx.
 848          */
 849         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 850
 851 #ifndef OPENSSL_NO_DANE
 852         X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
 853         s->tlsa_witness = -1;
 854 #else
 855         if (s->verify_callback)
 856                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 857 #endif
 858
 859         if (s->ctx->app_verify_callback != NULL)
 860 #if 1 /* new with OpenSSL 0.9.7 */
 861                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 862 #else
 863                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 864 #endif
 865         else
 866                 {
 867 #ifndef OPENSSL_NO_X509_VERIFY
 868                 i=X509_verify_cert(&ctx);
 869 #else
 870                 i=0;
 871                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 872                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 873 #endif
 874                 }
 875
 876         s->verify_result=ctx.error;
 877         X509_STORE_CTX_cleanup(&ctx);
 878
 879         return(i);
 880         }
 881
 882 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 883         {
 884         if (*ca_list != NULL)
 885                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 886
 887         *ca_list=name_list;
 888         }
 889
 890 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 891         {
 892         int i;
 893         STACK_OF(X509_NAME) *ret;
 894         X509_NAME *name;
 895
 896         ret=sk_X509_NAME_new_null();
 897         for (i=0; i<sk_X509_NAME_num(sk); i++)
 898                 {
 899                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 900                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 901                         {
 902                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 903                         return(NULL);
 904                         }
 905                 }
 906         return(ret);
 907         }
 908
 909 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 910         {
 911         set_client_CA_list(&(s->client_CA),name_list);
 912         }
 913
 914 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 915         {
 916         set_client_CA_list(&(ctx->client_CA),name_list);
 917         }
 918
 919 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 920         {
 921         return(ctx->client_CA);
 922         }
 923
 924 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 925         {
 926         if (s->type == SSL_ST_CONNECT)
 927                 { /* we are in the client */
 928                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 929                         (s->s3 != NULL))
 930                         return(s->s3->tmp.ca_names);
 931                 else
 932                         return(NULL);
 933                 }
 934         else
 935                 {
 936                 if (s->client_CA != NULL)
 937                         return(s->client_CA);
 938                 else
 939                         return(s->ctx->client_CA);
 940                 }
 941         }
 942
 943 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 944         {
 945         X509_NAME *name;
 946
 947         if (x == NULL) return(0);
 948         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 949                 return(0);
 950
 951         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 952                 return(0);
 953
 954         if (!sk_X509_NAME_push(*sk,name))
 955                 {
 956                 X509_NAME_free(name);
 957                 return(0);
 958                 }
 959         return(1);
 960         }
 961
 962 int SSL_add_client_CA(SSL *ssl,X509 *x)
 963         {
 964         return(add_client_CA(&(ssl->client_CA),x));
 965         }
 966
 967 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 968         {
 969         return(add_client_CA(&(ctx->client_CA),x));
 970         }
 971
 972 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 973         {
 974         return(X509_NAME_cmp(*a,*b));
 975         }
 976
 977 #ifndef OPENSSL_NO_STDIO
 978 /*!
 979  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 980  * it doesn't really have anything to do with clients (except that a common use
 981  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 982  * much to do with CAs, either, since it will load any old cert.
 983  * \param file the file containing one or more certs.
 984  * \return a ::STACK containing the certs.
 985  */
 986 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 987         {
 988         BIO *in;
 989         X509 *x=NULL;
 990         X509_NAME *xn=NULL;
 991         STACK_OF(X509_NAME) *ret = NULL,*sk;
 992
 993         sk=sk_X509_NAME_new(xname_cmp);
 994
 995         in=BIO_new(BIO_s_file_internal());
 996
 997         if ((sk == NULL) || (in == NULL))
 998                 {
 999                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1000                 goto err;
1001                 }
1002
1003         if (!BIO_read_filename(in,file))
1004                 goto err;
1005
1006         for (;;)
1007                 {
1008                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1009                         break;
1010                 if (ret == NULL)
1011                         {
1012                         ret = sk_X509_NAME_new_null();
1013                         if (ret == NULL)
1014                                 {
1015                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1016                                 goto err;
1017                                 }
1018                         }
1019                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1020                 /* check for duplicates */
1021                 xn=X509_NAME_dup(xn);
1022                 if (xn == NULL) goto err;
1023                 if (sk_X509_NAME_find(sk,xn) >= 0)
1024                         X509_NAME_free(xn);
1025                 else
1026                         {
1027                         sk_X509_NAME_push(sk,xn);
1028                         sk_X509_NAME_push(ret,xn);
1029                         }
1030                 }
1031
1032         if (0)
1033                 {
1034 err:
1035                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1036                 ret=NULL;
1037                 }
1038         if (sk != NULL) sk_X509_NAME_free(sk);
1039         if (in != NULL) BIO_free(in);
1040         if (x != NULL) X509_free(x);
1041         if (ret != NULL)
1042                 ERR_clear_error();
1043         return(ret);
1044         }
1045 #endif
1046
1047 /*!
1048  * Add a file of certs to a stack.
1049  * \param stack the stack to add to.
1050  * \param file the file to add from. All certs in this file that are not
1051  * already in the stack will be added.
1052  * \return 1 for success, 0 for failure. Note that in the case of failure some
1053  * certs may have been added to \c stack.
1054  */
1055
1056 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1057                                         const char *file)
1058         {
1059         BIO *in;
1060         X509 *x=NULL;
1061         X509_NAME *xn=NULL;
1062         int ret=1;
1063         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1064
1065         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1066
1067         in=BIO_new(BIO_s_file_internal());
1068
1069         if (in == NULL)
1070                 {
1071                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1072                 goto err;
1073                 }
1074
1075         if (!BIO_read_filename(in,file))
1076                 goto err;
1077
1078         for (;;)
1079                 {
1080                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1081                         break;
1082                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1083                 xn=X509_NAME_dup(xn);
1084                 if (xn == NULL) goto err;
1085                 if (sk_X509_NAME_find(stack,xn) >= 0)
1086                         X509_NAME_free(xn);
1087                 else
1088                         sk_X509_NAME_push(stack,xn);
1089                 }
1090
1091         ERR_clear_error();
1092
1093         if (0)
1094                 {
1095 err:
1096                 ret=0;
1097                 }
1098         if(in != NULL)
1099                 BIO_free(in);
1100         if(x != NULL)
1101                 X509_free(x);
1102
1103         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1104
1105         return ret;
1106         }
1107
1108 /*!
1109  * Add a directory of certs to a stack.
1110  * \param stack the stack to append to.
1111  * \param dir the directory to append from. All files in this directory will be
1112  * examined as potential certs. Any that are acceptable to
1113  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1114  * included.
1115  * \return 1 for success, 0 for failure. Note that in the case of failure some
1116  * certs may have been added to \c stack.
1117  */
1118
1119 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1120                                        const char *dir)
1121         {
1122         OPENSSL_DIR_CTX *d = NULL;
1123         const char *filename;
1124         int ret = 0;
1125
1126         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1127
1128         /* Note that a side effect is that the CAs will be sorted by name */
1129
1130         while((filename = OPENSSL_DIR_read(&d, dir)))
1131                 {
1132                 char buf[1024];
1133                 int r;
1134
1135                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1136                         {
1137                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1138                         goto err;
1139                         }
1140
1141 #ifdef OPENSSL_SYS_VMS
1142                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1143 #else
1144                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1145 #endif
1146                 if (r <= 0 || r >= (int)sizeof(buf))
1147                         goto err;
1148                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1149                         goto err;
1150                 }
1151
1152         if (errno)
1153                 {
1154                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1155                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1156                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1157                 goto err;
1158                 }
1159
1160         ret = 1;
1161
1162 err:
1163         if (d) OPENSSL_DIR_end(&d);
1164         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1165         return ret;
1166         }
1167
1168 /* Add a certificate to a BUF_MEM structure */
1169
1170 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1171         {
1172         int n;
1173         unsigned char *p;
1174
1175         n=i2d_X509(x,NULL);
1176         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1177                 {
1178                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1179                 return 0;
1180                 }
1181         p=(unsigned char *)&(buf->data[*l]);
1182         l2n3(n,p);
1183         i2d_X509(x,&p);
1184         *l+=n+3;
1185
1186         return 1;
1187         }
1188
1189 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1190 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1191         {
1192         BUF_MEM *buf = s->init_buf;
1193         int no_chain;
1194         int i;
1195
1196         X509 *x;
1197         STACK_OF(X509) *extra_certs;
1198         X509_STORE *chain_store;
1199
1200         if (cpk)
1201                 x = cpk->x509;
1202         else
1203                 x = NULL;
1204
1205         if (s->cert->chain_store)
1206                 chain_store = s->cert->chain_store;
1207         else
1208                 chain_store = s->ctx->cert_store;
1209
1210         /* If we have a certificate specific chain use it, else use
1211          * parent ctx.
1212          */
1213         if (cpk && cpk->chain)
1214                 extra_certs = cpk->chain;
1215         else
1216                 extra_certs = s->ctx->extra_certs;
1217
1218         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1219                 no_chain = 1;
1220         else
1221                 no_chain = 0;
1222
1223         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1224         if (!BUF_MEM_grow_clean(buf,10))
1225                 {
1226                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1227                 return 0;
1228                 }
1229         if (x != NULL)
1230                 {
1231                 if (no_chain)
1232                         {
1233                         if (!ssl_add_cert_to_buf(buf, l, x))
1234                                 return 0;
1235                         }
1236                 else
1237                         {
1238                         X509_STORE_CTX xs_ctx;
1239
1240                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1241                                 {
1242                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1243                                 return(0);
1244                                 }
1245                         X509_verify_cert(&xs_ctx);
1246                         /* Don't leave errors in the queue */
1247                         ERR_clear_error();
1248                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1249                                 {
1250                                 x = sk_X509_value(xs_ctx.chain, i);
1251
1252                                 if (!ssl_add_cert_to_buf(buf, l, x))
1253                                         {
1254                                         X509_STORE_CTX_cleanup(&xs_ctx);
1255                                         return 0;
1256                                         }
1257                                 }
1258                         X509_STORE_CTX_cleanup(&xs_ctx);
1259                         }
1260                 }
1261         for (i=0; i<sk_X509_num(extra_certs); i++)
1262                 {
1263                 x=sk_X509_value(extra_certs,i);
1264                 if (!ssl_add_cert_to_buf(buf, l, x))
1265                         return 0;
1266                 }
1267
1268         return 1;
1269         }
1270
1271 /* Build a certificate chain for current certificate */
1272 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1273         {
1274         CERT_PKEY *cpk = c->key;
1275         X509_STORE_CTX xs_ctx;
1276         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1277         X509 *x;
1278         int i;
1279
1280         if (!cpk->x509)
1281                 {
1282                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1283                 return 0;
1284                 }
1285
1286         if (c->chain_store)
1287                 chain_store = c->chain_store;
1288
1289         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1290                 untrusted = cpk->chain;
1291
1292         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1293                 {
1294                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1295                 return 0;
1296                 }
1297         /* Set suite B flags if needed */
1298         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1299
1300         i = X509_verify_cert(&xs_ctx);
1301         if (i > 0)
1302                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1303         X509_STORE_CTX_cleanup(&xs_ctx);
1304         if (i <= 0)
1305                 {
1306                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1307                 return 0;
1308                 }
1309         if (cpk->chain)
1310                 sk_X509_pop_free(cpk->chain, X509_free);
1311         /* Remove EE certificate from chain */
1312         x = sk_X509_shift(chain);
1313         X509_free(x);
1314         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1315                 {
1316                 x = sk_X509_pop(chain);
1317                 X509_free(x);
1318                 }
1319         cpk->chain = chain;
1320
1321         return 1;
1322         }
1323
1324 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1325         {
1326         X509_STORE **pstore;
1327         if (chain)
1328                 pstore = &c->chain_store;
1329         else
1330                 pstore = &c->verify_store;
1331         if (*pstore)
1332                 X509_STORE_free(*pstore);
1333         *pstore = store;
1334         if (ref && store)
1335                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1336         return 1;
1337         }
1338