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 #ifndef OPENSSL_NO_TLSEXT
 333      if (cert->pkeys[i].authz != NULL)
 334                         {
 335                         /* Just copy everything. */
 336                         ret->pkeys[i].authz_length =
 337                                 cert->pkeys[i].authz_length;
 338                         ret->pkeys[i].authz =
 339                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
 340                         if (ret->pkeys[i].authz == NULL)
 341                                 {
 342                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 343                                 return NULL;
 344                                 }
 345                         memcpy(ret->pkeys[i].authz,
 346                                cert->pkeys[i].authz,
 347                                cert->pkeys[i].authz_length);
 348                         }
 349
 350                 if (cert->pkeys[i].serverinfo != NULL)
 351                         {
 352                         /* Just copy everything. */
 353                         ret->pkeys[i].serverinfo_length =
 354                                 cert->pkeys[i].serverinfo_length;
 355                         ret->pkeys[i].serverinfo =
 356                                 OPENSSL_malloc(ret->pkeys[i].serverinfo_length);
 357                         if (ret->pkeys[i].serverinfo == NULL)
 358                                 {
 359                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 360                                 return NULL;
 361                                 }
 362                         memcpy(ret->pkeys[i].serverinfo,
 363                                cert->pkeys[i].serverinfo,
 364                                cert->pkeys[i].serverinfo_length);
 365                         }
 366 #endif
 367                 }
 368
 369         ret->references=1;
 370         /* Set digests to defaults. NB: we don't copy existing values as they
 371          * will be set during handshake.
 372          */
 373         ssl_cert_set_default_md(ret);
 374         /* Peer sigalgs set to NULL as we get these from handshake too */
 375         ret->peer_sigalgs = NULL;
 376         ret->peer_sigalgslen = 0;
 377         /* Configured sigalgs however we copy across */
 378
 379         if (cert->conf_sigalgs)
 380                 {
 381                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 382                 if (!ret->conf_sigalgs)
 383                         goto err;
 384                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 385                                                 cert->conf_sigalgslen);
 386                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 387                 }
 388         else
 389                 ret->conf_sigalgs = NULL;
 390
 391         if (cert->client_sigalgs)
 392                 {
 393                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 394                 if (!ret->client_sigalgs)
 395                         goto err;
 396                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 397                                                 cert->client_sigalgslen);
 398                 ret->client_sigalgslen = cert->client_sigalgslen;
 399                 }
 400         else
 401                 ret->client_sigalgs = NULL;
 402         /* Shared sigalgs also NULL */
 403         ret->shared_sigalgs = NULL;
 404         /* Copy any custom client certificate types */
 405         if (cert->ctypes)
 406                 {
 407                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 408                 if (!ret->ctypes)
 409                         goto err;
 410                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 411                 ret->ctype_num = cert->ctype_num;
 412                 }
 413
 414         ret->cert_flags = cert->cert_flags;
 415
 416         ret->cert_cb = cert->cert_cb;
 417         ret->cert_cb_arg = cert->cert_cb_arg;
 418
 419         if (cert->verify_store)
 420                 {
 421                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 422                 ret->verify_store = cert->verify_store;
 423                 }
 424
 425         if (cert->chain_store)
 426                 {
 427                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 428                 ret->chain_store = cert->chain_store;
 429                 }
 430
 431         ret->ciphers_raw = NULL;
 432
 433         return(ret);
 434
 435 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 436 err:
 437 #endif
 438 #ifndef OPENSSL_NO_RSA
 439         if (ret->rsa_tmp != NULL)
 440                 RSA_free(ret->rsa_tmp);
 441 #endif
 442 #ifndef OPENSSL_NO_DH
 443         if (ret->dh_tmp != NULL)
 444                 DH_free(ret->dh_tmp);
 445 #endif
 446 #ifndef OPENSSL_NO_ECDH
 447         if (ret->ecdh_tmp != NULL)
 448                 EC_KEY_free(ret->ecdh_tmp);
 449 #endif
 450
 451         ssl_cert_clear_certs(ret);
 452
 453         return NULL;
 454         }
 455
 456 /* Free up and clear all certificates and chains */
 457
 458 void ssl_cert_clear_certs(CERT *c)
 459         {
 460         int i;
 461         if (c == NULL)
 462                 return;
 463         for (i = 0; i<SSL_PKEY_NUM; i++)
 464                 {
 465                 CERT_PKEY *cpk = c->pkeys + i;
 466                 if (cpk->x509)
 467                         {
 468                         X509_free(cpk->x509);
 469                         cpk->x509 = NULL;
 470                         }
 471                 if (cpk->privatekey)
 472                         {
 473                         EVP_PKEY_free(cpk->privatekey);
 474                         cpk->privatekey = NULL;
 475                         }
 476                 if (cpk->chain)
 477                         {
 478                         sk_X509_pop_free(cpk->chain, X509_free);
 479                         cpk->chain = NULL;
 480                         }
 481 #ifndef OPENSSL_NO_TLSEXT
 482                 if (cpk->authz)
 483                         {
 484                         OPENSSL_free(cpk->authz);
 485                         cpk->authz = NULL;
 486                         }
 487                 if (cpk->serverinfo)
 488                         {
 489                         OPENSSL_free(cpk->serverinfo);
 490                         cpk->serverinfo = NULL;
 491                         }
 492 #endif
 493                 /* Clear all flags apart from explicit sign */
 494                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 495                 }
 496         }
 497
 498 void ssl_cert_free(CERT *c)
 499         {
 500         int i;
 501
 502         if(c == NULL)
 503             return;
 504
 505         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 506 #ifdef REF_PRINT
 507         REF_PRINT("CERT",c);
 508 #endif
 509         if (i > 0) return;
 510 #ifdef REF_CHECK
 511         if (i < 0)
 512                 {
 513                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 514                 abort(); /* ok */
 515                 }
 516 #endif
 517
 518 #ifndef OPENSSL_NO_RSA
 519         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 520 #endif
 521 #ifndef OPENSSL_NO_DH
 522         if (c->dh_tmp) DH_free(c->dh_tmp);
 523 #endif
 524 #ifndef OPENSSL_NO_ECDH
 525         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 526 #endif
 527
 528         ssl_cert_clear_certs(c);
 529         if (c->peer_sigalgs)
 530                 OPENSSL_free(c->peer_sigalgs);
 531         if (c->conf_sigalgs)
 532                 OPENSSL_free(c->conf_sigalgs);
 533         if (c->client_sigalgs)
 534                 OPENSSL_free(c->client_sigalgs);
 535         if (c->shared_sigalgs)
 536                 OPENSSL_free(c->shared_sigalgs);
 537         if (c->ctypes)
 538                 OPENSSL_free(c->ctypes);
 539         if (c->verify_store)
 540                 X509_STORE_free(c->verify_store);
 541         if (c->chain_store)
 542                 X509_STORE_free(c->chain_store);
 543         if (c->ciphers_raw)
 544                 OPENSSL_free(c->ciphers_raw);
 545         OPENSSL_free(c);
 546         }
 547
 548 int ssl_cert_inst(CERT **o)
 549         {
 550         /* Create a CERT if there isn't already one
 551          * (which cannot really happen, as it is initially created in
 552          * SSL_CTX_new; but the earlier code usually allows for that one
 553          * being non-existant, so we follow that behaviour, as it might
 554          * turn out that there actually is a reason for it -- but I'm
 555          * not sure that *all* of the existing code could cope with
 556          * s->cert being NULL, otherwise we could do without the
 557          * initialization in SSL_CTX_new).
 558          */
 559
 560         if (o == NULL)
 561                 {
 562                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 563                 return(0);
 564                 }
 565         if (*o == NULL)
 566                 {
 567                 if ((*o = ssl_cert_new()) == NULL)
 568                         {
 569                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 570                         return(0);
 571                         }
 572                 }
 573         return(1);
 574         }
 575
 576 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 577         {
 578         CERT_PKEY *cpk = c->key;
 579         if (!cpk)
 580                 return 0;
 581         if (cpk->chain)
 582                 sk_X509_pop_free(cpk->chain, X509_free);
 583         cpk->chain = chain;
 584         return 1;
 585         }
 586
 587 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 588         {
 589         STACK_OF(X509) *dchain;
 590         if (!chain)
 591                 return ssl_cert_set0_chain(c, NULL);
 592         dchain = X509_chain_up_ref(chain);
 593         if (!dchain)
 594                 return 0;
 595         if (!ssl_cert_set0_chain(c, dchain))
 596                 {
 597                 sk_X509_pop_free(dchain, X509_free);
 598                 return 0;
 599                 }
 600         return 1;
 601         }
 602
 603 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 604         {
 605         CERT_PKEY *cpk = c->key;
 606         if (!cpk)
 607                 return 0;
 608         if (!cpk->chain)
 609                 cpk->chain = sk_X509_new_null();
 610         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 611                 return 0;
 612         return 1;
 613         }
 614
 615 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 616         {
 617         if (!ssl_cert_add0_chain_cert(c, x))
 618                 return 0;
 619         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 620         return 1;
 621         }
 622
 623 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 624         {
 625         c->cert_cb = cb;
 626         c->cert_cb_arg = arg;
 627         }
 628
 629 SESS_CERT *ssl_sess_cert_new(void)
 630         {
 631         SESS_CERT *ret;
 632
 633         ret = OPENSSL_malloc(sizeof *ret);
 634         if (ret == NULL)
 635                 {
 636                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 637                 return NULL;
 638                 }
 639
 640         memset(ret, 0 ,sizeof *ret);
 641         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 642         ret->references = 1;
 643
 644         return ret;
 645         }
 646
 647 void ssl_sess_cert_free(SESS_CERT *sc)
 648         {
 649         int i;
 650
 651         if (sc == NULL)
 652                 return;
 653
 654         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 655 #ifdef REF_PRINT
 656         REF_PRINT("SESS_CERT", sc);
 657 #endif
 658         if (i > 0)
 659                 return;
 660 #ifdef REF_CHECK
 661         if (i < 0)
 662                 {
 663                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 664                 abort(); /* ok */
 665                 }
 666 #endif
 667
 668         /* i == 0 */
 669         if (sc->cert_chain != NULL)
 670                 sk_X509_pop_free(sc->cert_chain, X509_free);
 671         for (i = 0; i < SSL_PKEY_NUM; i++)
 672                 {
 673                 if (sc->peer_pkeys[i].x509 != NULL)
 674                         X509_free(sc->peer_pkeys[i].x509);
 675 #if 0 /* We don't have the peer's private key.  These lines are just
 676            * here as a reminder that we're still using a not-quite-appropriate
 677            * data structure. */
 678                 if (sc->peer_pkeys[i].privatekey != NULL)
 679                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 680 #endif
 681                 }
 682
 683 #ifndef OPENSSL_NO_RSA
 684         if (sc->peer_rsa_tmp != NULL)
 685                 RSA_free(sc->peer_rsa_tmp);
 686 #endif
 687 #ifndef OPENSSL_NO_DH
 688         if (sc->peer_dh_tmp != NULL)
 689                 DH_free(sc->peer_dh_tmp);
 690 #endif
 691 #ifndef OPENSSL_NO_ECDH
 692         if (sc->peer_ecdh_tmp != NULL)
 693                 EC_KEY_free(sc->peer_ecdh_tmp);
 694 #endif
 695
 696         OPENSSL_free(sc);
 697         }
 698
 699 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 700         {
 701         sc->peer_cert_type = type;
 702         return(1);
 703         }
 704
 705 #ifndef OPENSSL_NO_DANE
 706 /*
 707  * return value:
 708  * -1:  format or digest error
 709  *  0:  match
 710  *  1:  no match
 711  */
 712 int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record, unsigned int reclen)
 713 {
 714         const EVP_MD *md;
 715         unsigned char digest[EVP_MAX_MD_SIZE];
 716         unsigned int len, selector, matching_type;
 717         int ret;
 718
 719         if (reclen<3) return -1;
 720
 721         selector      = tlsa_record[1];
 722         matching_type = tlsa_record[2];
 723         tlsa_record   += 3;
 724         reclen        -= 3;
 725
 726         switch (matching_type) {
 727         case 0:                         /* exact match */
 728                 if (selector==0) {      /* full certificate */
 729                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 730                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 731                 }
 732                 else if (selector==1) { /* SubjectPublicKeyInfo */
 733                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 734
 735                         if (key == NULL) return -1;
 736                         if (key->length != reclen) return 1;
 737
 738                         return memcmp(key->data,tlsa_record,reclen)!=0;
 739                 }
 740                 return -1;
 741
 742         case 1:                         /* SHA256 */
 743         case 2:                         /* SHA512 */
 744                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 745
 746                 if (reclen!=EVP_MD_size(md)) return -1;
 747
 748                 if (selector==0) {      /* full certificate */
 749                         ret = X509_digest(cert,md,digest,&len);
 750                 }
 751                 else if (selector==1) { /* SubjectPublicKeyInfo */
 752                         ret = X509_pubkey_digest(cert,md,digest,&len);
 753                 }
 754                 else
 755                         return -1;
 756
 757                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 758         default:
 759                 return -1;
 760         }
 761 }
 762
 763 int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 764 {
 765         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 766         int depth=X509_STORE_CTX_get_error_depth(ctx);
 767         X509 *cert = sk_X509_value(ctx->chain,depth);
 768         unsigned int reclen, certificate_usage, witness_usage=0x100;
 769         const unsigned char *tlsa_record = s->tlsa_record;
 770         int tlsa_ret = -1;
 771
 772         if (s->verify_callback) ok = s->verify_callback(ok,ctx);
 773
 774         if (tlsa_record == NULL) return ok;
 775
 776         if (tlsa_record == (void*)-1) {
 777                 ctx->error = X509_V_ERR_INVALID_CA;     /* temporary code? */
 778                 return 0;
 779         }
 780
 781         while ((reclen = *(unsigned int *)tlsa_record)) {
 782                 tlsa_record += sizeof(unsigned int);
 783
 784                 /*
 785                  * tlsa_record[0]       Certificate Usage field
 786                  * tlsa_record[1]       Selector field
 787                  * tlsa_record[2]       Matching Type Field
 788                  * tlsa_record+3        Certificate Association data
 789                  */
 790                 certificate_usage = tlsa_record[0];
 791
 792                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 793                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 794                         if (tlsa_ret==0) {
 795                                 s->tlsa_witness = depth<<8|certificate_usage;
 796                                 break;
 797                         }
 798                         else if (tlsa_ret==-1)
 799                                 s->tlsa_witness = -1;   /* something phishy? */
 800                 }
 801
 802                 tlsa_record += reclen;
 803         }
 804
 805         if (depth==0) {
 806                 switch (s->tlsa_witness&0xff) {         /* witnessed usage */
 807                 case 0: /* CA constraint */
 808                         if (s->tlsa_witness<0 && ctx->error==X509_V_OK)
 809                                 ctx->error = X509_V_ERR_INVALID_CA;
 810                         return 0;
 811                 case 1: /* service certificate constraint */
 812                         if (tlsa_ret!=0 && ctx->error==X509_V_OK)
 813                                 ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 814                         return 0;
 815                 case 2: /* trust anchor assertion */
 816                         if ((s->tlsa_witness>>8)>0 && ctx->error==X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY)
 817                                 ctx->error = X509_V_OK;
 818                         break;
 819                 case 3: /* domain-issued certificate */
 820                         if (tlsa_ret==0)
 821                                 ctx->error = X509_V_OK; /* override all errors? */
 822                         break;
 823                 default:/* there were TLSA records, but something phishy happened */
 824                         ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 825                         return ok;
 826                 }
 827         }
 828
 829         /*
 830          * returning 1 makes verify procedure traverse the whole chain,
 831          * not actually approve it...
 832          */
 833         return 1;
 834 }
 835 #endif
 836
 837 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 838         {
 839         X509 *x;
 840         int i;
 841         X509_STORE *verify_store;
 842         X509_STORE_CTX ctx;
 843
 844         if (s->cert->verify_store)
 845                 verify_store = s->cert->verify_store;
 846         else
 847                 verify_store = s->ctx->cert_store;
 848
 849         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 850                 return(0);
 851
 852         x=sk_X509_value(sk,0);
 853         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 854                 {
 855                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 856                 return(0);
 857                 }
 858         /* Set suite B flags if needed */
 859         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 860 #if 0
 861         if (SSL_get_verify_depth(s) >= 0)
 862                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 863 #endif
 864         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 865
 866         /* We need to inherit the verify parameters. These can be determined by
 867          * the context: if its a server it will verify SSL client certificates
 868          * or vice versa.
 869          */
 870
 871         X509_STORE_CTX_set_default(&ctx,
 872                                 s->server ? "ssl_client" : "ssl_server");
 873         /* Anything non-default in "param" should overwrite anything in the
 874          * ctx.
 875          */
 876         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 877
 878 #ifndef OPENSSL_NO_DANE
 879         X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
 880         s->tlsa_witness = -1;
 881 #else
 882         if (s->verify_callback)
 883                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 884 #endif
 885
 886         if (s->ctx->app_verify_callback != NULL)
 887 #if 1 /* new with OpenSSL 0.9.7 */
 888                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 889 #else
 890                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 891 #endif
 892         else
 893                 {
 894 #ifndef OPENSSL_NO_X509_VERIFY
 895                 i=X509_verify_cert(&ctx);
 896 #else
 897                 i=0;
 898                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 899                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 900 #endif
 901                 }
 902
 903         s->verify_result=ctx.error;
 904         X509_STORE_CTX_cleanup(&ctx);
 905
 906         return(i);
 907         }
 908
 909 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 910         {
 911         if (*ca_list != NULL)
 912                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 913
 914         *ca_list=name_list;
 915         }
 916
 917 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 918         {
 919         int i;
 920         STACK_OF(X509_NAME) *ret;
 921         X509_NAME *name;
 922
 923         ret=sk_X509_NAME_new_null();
 924         for (i=0; i<sk_X509_NAME_num(sk); i++)
 925                 {
 926                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 927                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 928                         {
 929                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 930                         return(NULL);
 931                         }
 932                 }
 933         return(ret);
 934         }
 935
 936 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 937         {
 938         set_client_CA_list(&(s->client_CA),name_list);
 939         }
 940
 941 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 942         {
 943         set_client_CA_list(&(ctx->client_CA),name_list);
 944         }
 945
 946 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 947         {
 948         return(ctx->client_CA);
 949         }
 950
 951 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 952         {
 953         if (s->type == SSL_ST_CONNECT)
 954                 { /* we are in the client */
 955                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 956                         (s->s3 != NULL))
 957                         return(s->s3->tmp.ca_names);
 958                 else
 959                         return(NULL);
 960                 }
 961         else
 962                 {
 963                 if (s->client_CA != NULL)
 964                         return(s->client_CA);
 965                 else
 966                         return(s->ctx->client_CA);
 967                 }
 968         }
 969
 970 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 971         {
 972         X509_NAME *name;
 973
 974         if (x == NULL) return(0);
 975         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 976                 return(0);
 977
 978         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 979                 return(0);
 980
 981         if (!sk_X509_NAME_push(*sk,name))
 982                 {
 983                 X509_NAME_free(name);
 984                 return(0);
 985                 }
 986         return(1);
 987         }
 988
 989 int SSL_add_client_CA(SSL *ssl,X509 *x)
 990         {
 991         return(add_client_CA(&(ssl->client_CA),x));
 992         }
 993
 994 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 995         {
 996         return(add_client_CA(&(ctx->client_CA),x));
 997         }
 998
 999 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1000         {
1001         return(X509_NAME_cmp(*a,*b));
1002         }
1003
1004 #ifndef OPENSSL_NO_STDIO
1005 /*!
1006  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
1007  * it doesn't really have anything to do with clients (except that a common use
1008  * for a stack of CAs is to send it to the client). Actually, it doesn't have
1009  * much to do with CAs, either, since it will load any old cert.
1010  * \param file the file containing one or more certs.
1011  * \return a ::STACK containing the certs.
1012  */
1013 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
1014         {
1015         BIO *in;
1016         X509 *x=NULL;
1017         X509_NAME *xn=NULL;
1018         STACK_OF(X509_NAME) *ret = NULL,*sk;
1019
1020         sk=sk_X509_NAME_new(xname_cmp);
1021
1022         in=BIO_new(BIO_s_file_internal());
1023
1024         if ((sk == NULL) || (in == NULL))
1025                 {
1026                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1027                 goto err;
1028                 }
1029
1030         if (!BIO_read_filename(in,file))
1031                 goto err;
1032
1033         for (;;)
1034                 {
1035                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1036                         break;
1037                 if (ret == NULL)
1038                         {
1039                         ret = sk_X509_NAME_new_null();
1040                         if (ret == NULL)
1041                                 {
1042                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1043                                 goto err;
1044                                 }
1045                         }
1046                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1047                 /* check for duplicates */
1048                 xn=X509_NAME_dup(xn);
1049                 if (xn == NULL) goto err;
1050                 if (sk_X509_NAME_find(sk,xn) >= 0)
1051                         X509_NAME_free(xn);
1052                 else
1053                         {
1054                         sk_X509_NAME_push(sk,xn);
1055                         sk_X509_NAME_push(ret,xn);
1056                         }
1057                 }
1058
1059         if (0)
1060                 {
1061 err:
1062                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1063                 ret=NULL;
1064                 }
1065         if (sk != NULL) sk_X509_NAME_free(sk);
1066         if (in != NULL) BIO_free(in);
1067         if (x != NULL) X509_free(x);
1068         if (ret != NULL)
1069                 ERR_clear_error();
1070         return(ret);
1071         }
1072 #endif
1073
1074 /*!
1075  * Add a file of certs to a stack.
1076  * \param stack the stack to add to.
1077  * \param file the file to add from. All certs in this file that are not
1078  * already in the stack will be added.
1079  * \return 1 for success, 0 for failure. Note that in the case of failure some
1080  * certs may have been added to \c stack.
1081  */
1082
1083 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1084                                         const char *file)
1085         {
1086         BIO *in;
1087         X509 *x=NULL;
1088         X509_NAME *xn=NULL;
1089         int ret=1;
1090         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1091
1092         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1093
1094         in=BIO_new(BIO_s_file_internal());
1095
1096         if (in == NULL)
1097                 {
1098                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1099                 goto err;
1100                 }
1101
1102         if (!BIO_read_filename(in,file))
1103                 goto err;
1104
1105         for (;;)
1106                 {
1107                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1108                         break;
1109                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1110                 xn=X509_NAME_dup(xn);
1111                 if (xn == NULL) goto err;
1112                 if (sk_X509_NAME_find(stack,xn) >= 0)
1113                         X509_NAME_free(xn);
1114                 else
1115                         sk_X509_NAME_push(stack,xn);
1116                 }
1117
1118         ERR_clear_error();
1119
1120         if (0)
1121                 {
1122 err:
1123                 ret=0;
1124                 }
1125         if(in != NULL)
1126                 BIO_free(in);
1127         if(x != NULL)
1128                 X509_free(x);
1129
1130         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1131
1132         return ret;
1133         }
1134
1135 /*!
1136  * Add a directory of certs to a stack.
1137  * \param stack the stack to append to.
1138  * \param dir the directory to append from. All files in this directory will be
1139  * examined as potential certs. Any that are acceptable to
1140  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1141  * included.
1142  * \return 1 for success, 0 for failure. Note that in the case of failure some
1143  * certs may have been added to \c stack.
1144  */
1145
1146 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1147                                        const char *dir)
1148         {
1149         OPENSSL_DIR_CTX *d = NULL;
1150         const char *filename;
1151         int ret = 0;
1152
1153         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1154
1155         /* Note that a side effect is that the CAs will be sorted by name */
1156
1157         while((filename = OPENSSL_DIR_read(&d, dir)))
1158                 {
1159                 char buf[1024];
1160                 int r;
1161
1162                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1163                         {
1164                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1165                         goto err;
1166                         }
1167
1168 #ifdef OPENSSL_SYS_VMS
1169                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1170 #else
1171                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1172 #endif
1173                 if (r <= 0 || r >= (int)sizeof(buf))
1174                         goto err;
1175                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1176                         goto err;
1177                 }
1178
1179         if (errno)
1180                 {
1181                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1182                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1183                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1184                 goto err;
1185                 }
1186
1187         ret = 1;
1188
1189 err:
1190         if (d) OPENSSL_DIR_end(&d);
1191         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1192         return ret;
1193         }
1194
1195 /* Add a certificate to a BUF_MEM structure */
1196
1197 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1198         {
1199         int n;
1200         unsigned char *p;
1201
1202         n=i2d_X509(x,NULL);
1203         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1204                 {
1205                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1206                 return 0;
1207                 }
1208         p=(unsigned char *)&(buf->data[*l]);
1209         l2n3(n,p);
1210         i2d_X509(x,&p);
1211         *l+=n+3;
1212
1213         return 1;
1214         }
1215
1216 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1217 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1218         {
1219         BUF_MEM *buf = s->init_buf;
1220         int no_chain;
1221         int i;
1222
1223         X509 *x;
1224         STACK_OF(X509) *extra_certs;
1225         X509_STORE *chain_store;
1226
1227         if (cpk)
1228                 x = cpk->x509;
1229         else
1230                 x = NULL;
1231
1232         if (s->cert->chain_store)
1233                 chain_store = s->cert->chain_store;
1234         else
1235                 chain_store = s->ctx->cert_store;
1236
1237         /* If we have a certificate specific chain use it, else use
1238          * parent ctx.
1239          */
1240         if (cpk && cpk->chain)
1241                 extra_certs = cpk->chain;
1242         else
1243                 extra_certs = s->ctx->extra_certs;
1244
1245         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1246                 no_chain = 1;
1247         else
1248                 no_chain = 0;
1249
1250         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1251         if (!BUF_MEM_grow_clean(buf,10))
1252                 {
1253                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1254                 return 0;
1255                 }
1256         if (x != NULL)
1257                 {
1258                 if (no_chain)
1259                         {
1260                         if (!ssl_add_cert_to_buf(buf, l, x))
1261                                 return 0;
1262                         }
1263                 else
1264                         {
1265                         X509_STORE_CTX xs_ctx;
1266
1267                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1268                                 {
1269                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1270                                 return(0);
1271                                 }
1272                         X509_verify_cert(&xs_ctx);
1273                         /* Don't leave errors in the queue */
1274                         ERR_clear_error();
1275                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1276                                 {
1277                                 x = sk_X509_value(xs_ctx.chain, i);
1278
1279                                 if (!ssl_add_cert_to_buf(buf, l, x))
1280                                         {
1281                                         X509_STORE_CTX_cleanup(&xs_ctx);
1282                                         return 0;
1283                                         }
1284                                 }
1285                         X509_STORE_CTX_cleanup(&xs_ctx);
1286                         }
1287                 }
1288         for (i=0; i<sk_X509_num(extra_certs); i++)
1289                 {
1290                 x=sk_X509_value(extra_certs,i);
1291                 if (!ssl_add_cert_to_buf(buf, l, x))
1292                         return 0;
1293                 }
1294
1295         return 1;
1296         }
1297
1298 /* Build a certificate chain for current certificate */
1299 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1300         {
1301         CERT_PKEY *cpk = c->key;
1302         X509_STORE_CTX xs_ctx;
1303         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1304         X509 *x;
1305         int i;
1306
1307         if (!cpk->x509)
1308                 {
1309                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1310                 return 0;
1311                 }
1312
1313         if (c->chain_store)
1314                 chain_store = c->chain_store;
1315
1316         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1317                 untrusted = cpk->chain;
1318
1319         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1320                 {
1321                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1322                 return 0;
1323                 }
1324         /* Set suite B flags if needed */
1325         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1326
1327         i = X509_verify_cert(&xs_ctx);
1328         if (i > 0)
1329                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1330         X509_STORE_CTX_cleanup(&xs_ctx);
1331         if (i <= 0)
1332                 {
1333                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1334                 return 0;
1335                 }
1336         if (cpk->chain)
1337                 sk_X509_pop_free(cpk->chain, X509_free);
1338         /* Remove EE certificate from chain */
1339         x = sk_X509_shift(chain);
1340         X509_free(x);
1341         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1342                 {
1343                 x = sk_X509_pop(chain);
1344                 X509_free(x);
1345                 }
1346         cpk->chain = chain;
1347
1348         return 1;
1349         }
1350
1351 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1352         {
1353         X509_STORE **pstore;
1354         if (chain)
1355                 pstore = &c->chain_store;
1356         else
1357                 pstore = &c->verify_store;
1358         if (*pstore)
1359                 X509_STORE_free(*pstore);
1360         *pstore = store;
1361         if (ref && store)
1362                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1363         return 1;
1364         }
1365