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 =
 354                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 355                         if (ret->pkeys[i].serverinfo == NULL)
 356                                 {
 357                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 358                                 return NULL;
 359                                 }
 360                         ret->pkeys[i].serverinfo_length =
 361                                 cert->pkeys[i].serverinfo_length;
 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                         cpk->serverinfo_length = 0;
 492                         }
 493 #endif
 494                 /* Clear all flags apart from explicit sign */
 495                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 496                 }
 497         }
 498
 499 void ssl_cert_free(CERT *c)
 500         {
 501         int i;
 502
 503         if(c == NULL)
 504             return;
 505
 506         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 507 #ifdef REF_PRINT
 508         REF_PRINT("CERT",c);
 509 #endif
 510         if (i > 0) return;
 511 #ifdef REF_CHECK
 512         if (i < 0)
 513                 {
 514                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 515                 abort(); /* ok */
 516                 }
 517 #endif
 518
 519 #ifndef OPENSSL_NO_RSA
 520         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 521 #endif
 522 #ifndef OPENSSL_NO_DH
 523         if (c->dh_tmp) DH_free(c->dh_tmp);
 524 #endif
 525 #ifndef OPENSSL_NO_ECDH
 526         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 527 #endif
 528
 529         ssl_cert_clear_certs(c);
 530         if (c->peer_sigalgs)
 531                 OPENSSL_free(c->peer_sigalgs);
 532         if (c->conf_sigalgs)
 533                 OPENSSL_free(c->conf_sigalgs);
 534         if (c->client_sigalgs)
 535                 OPENSSL_free(c->client_sigalgs);
 536         if (c->shared_sigalgs)
 537                 OPENSSL_free(c->shared_sigalgs);
 538         if (c->ctypes)
 539                 OPENSSL_free(c->ctypes);
 540         if (c->verify_store)
 541                 X509_STORE_free(c->verify_store);
 542         if (c->chain_store)
 543                 X509_STORE_free(c->chain_store);
 544         if (c->ciphers_raw)
 545                 OPENSSL_free(c->ciphers_raw);
 546         OPENSSL_free(c);
 547         }
 548
 549 int ssl_cert_inst(CERT **o)
 550         {
 551         /* Create a CERT if there isn't already one
 552          * (which cannot really happen, as it is initially created in
 553          * SSL_CTX_new; but the earlier code usually allows for that one
 554          * being non-existant, so we follow that behaviour, as it might
 555          * turn out that there actually is a reason for it -- but I'm
 556          * not sure that *all* of the existing code could cope with
 557          * s->cert being NULL, otherwise we could do without the
 558          * initialization in SSL_CTX_new).
 559          */
 560
 561         if (o == NULL)
 562                 {
 563                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 564                 return(0);
 565                 }
 566         if (*o == NULL)
 567                 {
 568                 if ((*o = ssl_cert_new()) == NULL)
 569                         {
 570                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 571                         return(0);
 572                         }
 573                 }
 574         return(1);
 575         }
 576
 577 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 578         {
 579         CERT_PKEY *cpk = c->key;
 580         if (!cpk)
 581                 return 0;
 582         if (cpk->chain)
 583                 sk_X509_pop_free(cpk->chain, X509_free);
 584         cpk->chain = chain;
 585         return 1;
 586         }
 587
 588 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 589         {
 590         STACK_OF(X509) *dchain;
 591         if (!chain)
 592                 return ssl_cert_set0_chain(c, NULL);
 593         dchain = X509_chain_up_ref(chain);
 594         if (!dchain)
 595                 return 0;
 596         if (!ssl_cert_set0_chain(c, dchain))
 597                 {
 598                 sk_X509_pop_free(dchain, X509_free);
 599                 return 0;
 600                 }
 601         return 1;
 602         }
 603
 604 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 605         {
 606         CERT_PKEY *cpk = c->key;
 607         if (!cpk)
 608                 return 0;
 609         if (!cpk->chain)
 610                 cpk->chain = sk_X509_new_null();
 611         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 612                 return 0;
 613         return 1;
 614         }
 615
 616 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 617         {
 618         if (!ssl_cert_add0_chain_cert(c, x))
 619                 return 0;
 620         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 621         return 1;
 622         }
 623
 624 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 625         {
 626         c->cert_cb = cb;
 627         c->cert_cb_arg = arg;
 628         }
 629
 630 SESS_CERT *ssl_sess_cert_new(void)
 631         {
 632         SESS_CERT *ret;
 633
 634         ret = OPENSSL_malloc(sizeof *ret);
 635         if (ret == NULL)
 636                 {
 637                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 638                 return NULL;
 639                 }
 640
 641         memset(ret, 0 ,sizeof *ret);
 642         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 643         ret->references = 1;
 644
 645         return ret;
 646         }
 647
 648 void ssl_sess_cert_free(SESS_CERT *sc)
 649         {
 650         int i;
 651
 652         if (sc == NULL)
 653                 return;
 654
 655         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 656 #ifdef REF_PRINT
 657         REF_PRINT("SESS_CERT", sc);
 658 #endif
 659         if (i > 0)
 660                 return;
 661 #ifdef REF_CHECK
 662         if (i < 0)
 663                 {
 664                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 665                 abort(); /* ok */
 666                 }
 667 #endif
 668
 669         /* i == 0 */
 670         if (sc->cert_chain != NULL)
 671                 sk_X509_pop_free(sc->cert_chain, X509_free);
 672         for (i = 0; i < SSL_PKEY_NUM; i++)
 673                 {
 674                 if (sc->peer_pkeys[i].x509 != NULL)
 675                         X509_free(sc->peer_pkeys[i].x509);
 676 #if 0 /* We don't have the peer's private key.  These lines are just
 677            * here as a reminder that we're still using a not-quite-appropriate
 678            * data structure. */
 679                 if (sc->peer_pkeys[i].privatekey != NULL)
 680                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 681 #endif
 682                 }
 683
 684 #ifndef OPENSSL_NO_RSA
 685         if (sc->peer_rsa_tmp != NULL)
 686                 RSA_free(sc->peer_rsa_tmp);
 687 #endif
 688 #ifndef OPENSSL_NO_DH
 689         if (sc->peer_dh_tmp != NULL)
 690                 DH_free(sc->peer_dh_tmp);
 691 #endif
 692 #ifndef OPENSSL_NO_ECDH
 693         if (sc->peer_ecdh_tmp != NULL)
 694                 EC_KEY_free(sc->peer_ecdh_tmp);
 695 #endif
 696
 697         OPENSSL_free(sc);
 698         }
 699
 700 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 701         {
 702         sc->peer_cert_type = type;
 703         return(1);
 704         }
 705
 706 #ifndef OPENSSL_NO_DANE
 707 /*
 708  * return value:
 709  * -1:  format or digest error
 710  *  0:  match
 711  *  1:  no match
 712  */
 713 int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record, unsigned int reclen)
 714 {
 715         const EVP_MD *md;
 716         unsigned char digest[EVP_MAX_MD_SIZE];
 717         unsigned int len, selector, matching_type;
 718         int ret;
 719
 720         if (reclen<3) return -1;
 721
 722         selector      = tlsa_record[1];
 723         matching_type = tlsa_record[2];
 724         tlsa_record   += 3;
 725         reclen        -= 3;
 726
 727         switch (matching_type) {
 728         case 0:                         /* exact match */
 729                 if (selector==0) {      /* full certificate */
 730                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 731                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 732                 }
 733                 else if (selector==1) { /* SubjectPublicKeyInfo */
 734                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 735
 736                         if (key == NULL) return -1;
 737                         if (key->length != reclen) return 1;
 738
 739                         return memcmp(key->data,tlsa_record,reclen)!=0;
 740                 }
 741                 return -1;
 742
 743         case 1:                         /* SHA256 */
 744         case 2:                         /* SHA512 */
 745                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 746
 747                 if (reclen!=EVP_MD_size(md)) return -1;
 748
 749                 if (selector==0) {      /* full certificate */
 750                         ret = X509_digest(cert,md,digest,&len);
 751                 }
 752                 else if (selector==1) { /* SubjectPublicKeyInfo */
 753                         ret = X509_pubkey_digest(cert,md,digest,&len);
 754                 }
 755                 else
 756                         return -1;
 757
 758                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 759         default:
 760                 return -1;
 761         }
 762 }
 763
 764 int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 765 {
 766         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 767         int depth=X509_STORE_CTX_get_error_depth(ctx);
 768         X509 *cert = sk_X509_value(ctx->chain,depth);
 769         unsigned int reclen, certificate_usage, witness_usage=0x100;
 770         const unsigned char *tlsa_record = s->tlsa_record;
 771         int tlsa_ret = -1;
 772
 773         if (s->verify_callback) ok = s->verify_callback(ok,ctx);
 774
 775         if (tlsa_record == NULL) return ok;
 776
 777         if (tlsa_record == (void*)-1) {
 778                 ctx->error = X509_V_ERR_INVALID_CA;     /* temporary code? */
 779                 return 0;
 780         }
 781
 782         while ((reclen = *(unsigned int *)tlsa_record)) {
 783                 tlsa_record += sizeof(unsigned int);
 784
 785                 /*
 786                  * tlsa_record[0]       Certificate Usage field
 787                  * tlsa_record[1]       Selector field
 788                  * tlsa_record[2]       Matching Type Field
 789                  * tlsa_record+3        Certificate Association data
 790                  */
 791                 certificate_usage = tlsa_record[0];
 792
 793                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 794                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 795                         if (tlsa_ret==0) {
 796                                 s->tlsa_witness = depth<<8|certificate_usage;
 797                                 break;
 798                         }
 799                         else if (tlsa_ret==-1)
 800                                 s->tlsa_witness = -1;   /* something phishy? */
 801                 }
 802
 803                 tlsa_record += reclen;
 804         }
 805
 806         if (depth==0) {
 807                 switch (s->tlsa_witness&0xff) {         /* witnessed usage */
 808                 case 0: /* CA constraint */
 809                         if (s->tlsa_witness<0 && ctx->error==X509_V_OK)
 810                                 ctx->error = X509_V_ERR_INVALID_CA;
 811                         return 0;
 812                 case 1: /* service certificate constraint */
 813                         if (tlsa_ret!=0 && ctx->error==X509_V_OK)
 814                                 ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 815                         return 0;
 816                 case 2: /* trust anchor assertion */
 817                         if ((s->tlsa_witness>>8)>0 && ctx->error==X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY)
 818                                 ctx->error = X509_V_OK;
 819                         break;
 820                 case 3: /* domain-issued certificate */
 821                         if (tlsa_ret==0)
 822                                 ctx->error = X509_V_OK; /* override all errors? */
 823                         break;
 824                 default:/* there were TLSA records, but something phishy happened */
 825                         ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 826                         return ok;
 827                 }
 828         }
 829
 830         /*
 831          * returning 1 makes verify procedure traverse the whole chain,
 832          * not actually approve it...
 833          */
 834         return 1;
 835 }
 836 #endif
 837
 838 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 839         {
 840         X509 *x;
 841         int i;
 842         X509_STORE *verify_store;
 843         X509_STORE_CTX ctx;
 844
 845         if (s->cert->verify_store)
 846                 verify_store = s->cert->verify_store;
 847         else
 848                 verify_store = s->ctx->cert_store;
 849
 850         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 851                 return(0);
 852
 853         x=sk_X509_value(sk,0);
 854         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 855                 {
 856                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 857                 return(0);
 858                 }
 859         /* Set suite B flags if needed */
 860         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 861 #if 0
 862         if (SSL_get_verify_depth(s) >= 0)
 863                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 864 #endif
 865         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 866
 867         /* We need to inherit the verify parameters. These can be determined by
 868          * the context: if its a server it will verify SSL client certificates
 869          * or vice versa.
 870          */
 871
 872         X509_STORE_CTX_set_default(&ctx,
 873                                 s->server ? "ssl_client" : "ssl_server");
 874         /* Anything non-default in "param" should overwrite anything in the
 875          * ctx.
 876          */
 877         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 878
 879 #ifndef OPENSSL_NO_DANE
 880         X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
 881         s->tlsa_witness = -1;
 882 #else
 883         if (s->verify_callback)
 884                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 885 #endif
 886
 887         if (s->ctx->app_verify_callback != NULL)
 888 #if 1 /* new with OpenSSL 0.9.7 */
 889                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 890 #else
 891                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 892 #endif
 893         else
 894                 {
 895 #ifndef OPENSSL_NO_X509_VERIFY
 896                 i=X509_verify_cert(&ctx);
 897 #else
 898                 i=0;
 899                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 900                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 901 #endif
 902                 }
 903
 904         s->verify_result=ctx.error;
 905         X509_STORE_CTX_cleanup(&ctx);
 906
 907         return(i);
 908         }
 909
 910 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 911         {
 912         if (*ca_list != NULL)
 913                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 914
 915         *ca_list=name_list;
 916         }
 917
 918 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 919         {
 920         int i;
 921         STACK_OF(X509_NAME) *ret;
 922         X509_NAME *name;
 923
 924         ret=sk_X509_NAME_new_null();
 925         for (i=0; i<sk_X509_NAME_num(sk); i++)
 926                 {
 927                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 928                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 929                         {
 930                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 931                         return(NULL);
 932                         }
 933                 }
 934         return(ret);
 935         }
 936
 937 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 938         {
 939         set_client_CA_list(&(s->client_CA),name_list);
 940         }
 941
 942 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 943         {
 944         set_client_CA_list(&(ctx->client_CA),name_list);
 945         }
 946
 947 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 948         {
 949         return(ctx->client_CA);
 950         }
 951
 952 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 953         {
 954         if (s->type == SSL_ST_CONNECT)
 955                 { /* we are in the client */
 956                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 957                         (s->s3 != NULL))
 958                         return(s->s3->tmp.ca_names);
 959                 else
 960                         return(NULL);
 961                 }
 962         else
 963                 {
 964                 if (s->client_CA != NULL)
 965                         return(s->client_CA);
 966                 else
 967                         return(s->ctx->client_CA);
 968                 }
 969         }
 970
 971 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 972         {
 973         X509_NAME *name;
 974
 975         if (x == NULL) return(0);
 976         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 977                 return(0);
 978
 979         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 980                 return(0);
 981
 982         if (!sk_X509_NAME_push(*sk,name))
 983                 {
 984                 X509_NAME_free(name);
 985                 return(0);
 986                 }
 987         return(1);
 988         }
 989
 990 int SSL_add_client_CA(SSL *ssl,X509 *x)
 991         {
 992         return(add_client_CA(&(ssl->client_CA),x));
 993         }
 994
 995 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 996         {
 997         return(add_client_CA(&(ctx->client_CA),x));
 998         }
 999
1000 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1001         {
1002         return(X509_NAME_cmp(*a,*b));
1003         }
1004
1005 #ifndef OPENSSL_NO_STDIO
1006 /*!
1007  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
1008  * it doesn't really have anything to do with clients (except that a common use
1009  * for a stack of CAs is to send it to the client). Actually, it doesn't have
1010  * much to do with CAs, either, since it will load any old cert.
1011  * \param file the file containing one or more certs.
1012  * \return a ::STACK containing the certs.
1013  */
1014 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
1015         {
1016         BIO *in;
1017         X509 *x=NULL;
1018         X509_NAME *xn=NULL;
1019         STACK_OF(X509_NAME) *ret = NULL,*sk;
1020
1021         sk=sk_X509_NAME_new(xname_cmp);
1022
1023         in=BIO_new(BIO_s_file_internal());
1024
1025         if ((sk == NULL) || (in == NULL))
1026                 {
1027                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1028                 goto err;
1029                 }
1030
1031         if (!BIO_read_filename(in,file))
1032                 goto err;
1033
1034         for (;;)
1035                 {
1036                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1037                         break;
1038                 if (ret == NULL)
1039                         {
1040                         ret = sk_X509_NAME_new_null();
1041                         if (ret == NULL)
1042                                 {
1043                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1044                                 goto err;
1045                                 }
1046                         }
1047                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1048                 /* check for duplicates */
1049                 xn=X509_NAME_dup(xn);
1050                 if (xn == NULL) goto err;
1051                 if (sk_X509_NAME_find(sk,xn) >= 0)
1052                         X509_NAME_free(xn);
1053                 else
1054                         {
1055                         sk_X509_NAME_push(sk,xn);
1056                         sk_X509_NAME_push(ret,xn);
1057                         }
1058                 }
1059
1060         if (0)
1061                 {
1062 err:
1063                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1064                 ret=NULL;
1065                 }
1066         if (sk != NULL) sk_X509_NAME_free(sk);
1067         if (in != NULL) BIO_free(in);
1068         if (x != NULL) X509_free(x);
1069         if (ret != NULL)
1070                 ERR_clear_error();
1071         return(ret);
1072         }
1073 #endif
1074
1075 /*!
1076  * Add a file of certs to a stack.
1077  * \param stack the stack to add to.
1078  * \param file the file to add from. All certs in this file that are not
1079  * already in the stack will be added.
1080  * \return 1 for success, 0 for failure. Note that in the case of failure some
1081  * certs may have been added to \c stack.
1082  */
1083
1084 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1085                                         const char *file)
1086         {
1087         BIO *in;
1088         X509 *x=NULL;
1089         X509_NAME *xn=NULL;
1090         int ret=1;
1091         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1092
1093         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1094
1095         in=BIO_new(BIO_s_file_internal());
1096
1097         if (in == NULL)
1098                 {
1099                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1100                 goto err;
1101                 }
1102
1103         if (!BIO_read_filename(in,file))
1104                 goto err;
1105
1106         for (;;)
1107                 {
1108                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1109                         break;
1110                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1111                 xn=X509_NAME_dup(xn);
1112                 if (xn == NULL) goto err;
1113                 if (sk_X509_NAME_find(stack,xn) >= 0)
1114                         X509_NAME_free(xn);
1115                 else
1116                         sk_X509_NAME_push(stack,xn);
1117                 }
1118
1119         ERR_clear_error();
1120
1121         if (0)
1122                 {
1123 err:
1124                 ret=0;
1125                 }
1126         if(in != NULL)
1127                 BIO_free(in);
1128         if(x != NULL)
1129                 X509_free(x);
1130
1131         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1132
1133         return ret;
1134         }
1135
1136 /*!
1137  * Add a directory of certs to a stack.
1138  * \param stack the stack to append to.
1139  * \param dir the directory to append from. All files in this directory will be
1140  * examined as potential certs. Any that are acceptable to
1141  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1142  * included.
1143  * \return 1 for success, 0 for failure. Note that in the case of failure some
1144  * certs may have been added to \c stack.
1145  */
1146
1147 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1148                                        const char *dir)
1149         {
1150         OPENSSL_DIR_CTX *d = NULL;
1151         const char *filename;
1152         int ret = 0;
1153
1154         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1155
1156         /* Note that a side effect is that the CAs will be sorted by name */
1157
1158         while((filename = OPENSSL_DIR_read(&d, dir)))
1159                 {
1160                 char buf[1024];
1161                 int r;
1162
1163                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1164                         {
1165                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1166                         goto err;
1167                         }
1168
1169 #ifdef OPENSSL_SYS_VMS
1170                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1171 #else
1172                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1173 #endif
1174                 if (r <= 0 || r >= (int)sizeof(buf))
1175                         goto err;
1176                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1177                         goto err;
1178                 }
1179
1180         if (errno)
1181                 {
1182                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1183                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1184                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1185                 goto err;
1186                 }
1187
1188         ret = 1;
1189
1190 err:
1191         if (d) OPENSSL_DIR_end(&d);
1192         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1193         return ret;
1194         }
1195
1196 /* Add a certificate to a BUF_MEM structure */
1197
1198 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1199         {
1200         int n;
1201         unsigned char *p;
1202
1203         n=i2d_X509(x,NULL);
1204         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1205                 {
1206                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1207                 return 0;
1208                 }
1209         p=(unsigned char *)&(buf->data[*l]);
1210         l2n3(n,p);
1211         i2d_X509(x,&p);
1212         *l+=n+3;
1213
1214         return 1;
1215         }
1216
1217 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1218 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1219         {
1220         BUF_MEM *buf = s->init_buf;
1221         int no_chain;
1222         int i;
1223
1224         X509 *x;
1225         STACK_OF(X509) *extra_certs;
1226         X509_STORE *chain_store;
1227
1228         if (cpk)
1229                 x = cpk->x509;
1230         else
1231                 x = NULL;
1232
1233         if (s->cert->chain_store)
1234                 chain_store = s->cert->chain_store;
1235         else
1236                 chain_store = s->ctx->cert_store;
1237
1238         /* If we have a certificate specific chain use it, else use
1239          * parent ctx.
1240          */
1241         if (cpk && cpk->chain)
1242                 extra_certs = cpk->chain;
1243         else
1244                 extra_certs = s->ctx->extra_certs;
1245
1246         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1247                 no_chain = 1;
1248         else
1249                 no_chain = 0;
1250
1251         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1252         if (!BUF_MEM_grow_clean(buf,10))
1253                 {
1254                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1255                 return 0;
1256                 }
1257         if (x != NULL)
1258                 {
1259                 if (no_chain)
1260                         {
1261                         if (!ssl_add_cert_to_buf(buf, l, x))
1262                                 return 0;
1263                         }
1264                 else
1265                         {
1266                         X509_STORE_CTX xs_ctx;
1267
1268                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1269                                 {
1270                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1271                                 return(0);
1272                                 }
1273                         X509_verify_cert(&xs_ctx);
1274                         /* Don't leave errors in the queue */
1275                         ERR_clear_error();
1276                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1277                                 {
1278                                 x = sk_X509_value(xs_ctx.chain, i);
1279
1280                                 if (!ssl_add_cert_to_buf(buf, l, x))
1281                                         {
1282                                         X509_STORE_CTX_cleanup(&xs_ctx);
1283                                         return 0;
1284                                         }
1285                                 }
1286                         X509_STORE_CTX_cleanup(&xs_ctx);
1287                         }
1288                 }
1289         for (i=0; i<sk_X509_num(extra_certs); i++)
1290                 {
1291                 x=sk_X509_value(extra_certs,i);
1292                 if (!ssl_add_cert_to_buf(buf, l, x))
1293                         return 0;
1294                 }
1295
1296         return 1;
1297         }
1298
1299 /* Build a certificate chain for current certificate */
1300 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1301         {
1302         CERT_PKEY *cpk = c->key;
1303         X509_STORE_CTX xs_ctx;
1304         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1305         X509 *x;
1306         int i;
1307
1308         if (!cpk->x509)
1309                 {
1310                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1311                 return 0;
1312                 }
1313
1314         if (c->chain_store)
1315                 chain_store = c->chain_store;
1316
1317         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1318                 untrusted = cpk->chain;
1319
1320         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1321                 {
1322                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1323                 return 0;
1324                 }
1325         /* Set suite B flags if needed */
1326         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1327
1328         i = X509_verify_cert(&xs_ctx);
1329         if (i > 0)
1330                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1331         X509_STORE_CTX_cleanup(&xs_ctx);
1332         if (i <= 0)
1333                 {
1334                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1335                 return 0;
1336                 }
1337         if (cpk->chain)
1338                 sk_X509_pop_free(cpk->chain, X509_free);
1339         /* Remove EE certificate from chain */
1340         x = sk_X509_shift(chain);
1341         X509_free(x);
1342         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1343                 {
1344                 x = sk_X509_pop(chain);
1345                 X509_free(x);
1346                 }
1347         cpk->chain = chain;
1348
1349         return 1;
1350         }
1351
1352 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1353         {
1354         X509_STORE **pstore;
1355         if (chain)
1356                 pstore = &c->chain_store;
1357         else
1358                 pstore = &c->verify_store;
1359         if (*pstore)
1360                 X509_STORE_free(*pstore);
1361         *pstore = store;
1362         if (ref && store)
1363                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1364         return 1;
1365         }
1366