ssl/ssl_cert.c

   1 /*! \file ssl/ssl_cert.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 #include <stdio.h>
 118
 119 #include "e_os.h"
 120 #ifndef NO_SYS_TYPES_H
 121 # include <sys/types.h>
 122 #endif
 123
 124 #include "o_dir.h"
 125 #include <openssl/objects.h>
 126 #include <openssl/bio.h>
 127 #include <openssl/pem.h>
 128 #include <openssl/x509v3.h>
 129 #ifndef OPENSSL_NO_DH
 130 #include <openssl/dh.h>
 131 #endif
 132 #include <openssl/bn.h>
 133 #include "ssl_locl.h"
 134
 135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
 136     {
 137     static volatile int ssl_x509_store_ctx_idx= -1;
 138     int got_write_lock = 0;
 139
 140     if (((size_t)&ssl_x509_store_ctx_idx&(sizeof(ssl_x509_store_ctx_idx)-1))
 141                 ==0)    /* check alignment, practically always true */
 142         {
 143         int ret;
 144
 145         if ((ret=ssl_x509_store_ctx_idx) < 0)
 146                 {
 147                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 148                 if ((ret=ssl_x509_store_ctx_idx) < 0)
 149                         {
 150                         ret=ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 151                                 0,"SSL for verify callback",NULL,NULL,NULL);
 152                         }
 153                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 154                 }
 155
 156         return ret;
 157         }
 158     else                /* commonly eliminated */
 159         {
 160         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 161
 162         if (ssl_x509_store_ctx_idx < 0)
 163                 {
 164                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 165                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 166                 got_write_lock = 1;
 167
 168                 if (ssl_x509_store_ctx_idx < 0)
 169                         {
 170                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 171                                 0,"SSL for verify callback",NULL,NULL,NULL);
 172                         }
 173                 }
 174
 175         if (got_write_lock)
 176                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 177         else
 178                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 179
 180         return ssl_x509_store_ctx_idx;
 181         }
 182     }
 183
 184 void ssl_cert_set_default_md(CERT *cert)
 185         {
 186         /* Set digest values to defaults */
 187 #ifndef OPENSSL_NO_DSA
 188         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
 189 #endif
 190 #ifndef OPENSSL_NO_RSA
 191         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
 192         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
 193 #endif
 194 #ifndef OPENSSL_NO_ECDSA
 195         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
 196 #endif
 197         }
 198
 199 CERT *ssl_cert_new(void)
 200         {
 201         CERT *ret;
 202
 203         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
 204         if (ret == NULL)
 205                 {
 206                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
 207                 return(NULL);
 208                 }
 209         memset(ret,0,sizeof(CERT));
 210
 211         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
 212         ret->references=1;
 213         ssl_cert_set_default_md(ret);
 214         return(ret);
 215         }
 216
 217 CERT *ssl_cert_dup(CERT *cert)
 218         {
 219         CERT *ret;
 220         int i;
 221
 222         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
 223         if (ret == NULL)
 224                 {
 225                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 226                 return(NULL);
 227                 }
 228
 229         memset(ret, 0, sizeof(CERT));
 230
 231         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
 232         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
 233          * if you find that more readable */
 234
 235         ret->valid = cert->valid;
 236         ret->mask_k = cert->mask_k;
 237         ret->mask_a = cert->mask_a;
 238         ret->export_mask_k = cert->export_mask_k;
 239         ret->export_mask_a = cert->export_mask_a;
 240
 241 #ifndef OPENSSL_NO_RSA
 242         if (cert->rsa_tmp != NULL)
 243                 {
 244                 RSA_up_ref(cert->rsa_tmp);
 245                 ret->rsa_tmp = cert->rsa_tmp;
 246                 }
 247         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 248 #endif
 249
 250 #ifndef OPENSSL_NO_DH
 251         if (cert->dh_tmp != NULL)
 252                 {
 253                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
 254                 if (ret->dh_tmp == NULL)
 255                         {
 256                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
 257                         goto err;
 258                         }
 259                 if (cert->dh_tmp->priv_key)
 260                         {
 261                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
 262                         if (!b)
 263                                 {
 264                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 265                                 goto err;
 266                                 }
 267                         ret->dh_tmp->priv_key = b;
 268                         }
 269                 if (cert->dh_tmp->pub_key)
 270                         {
 271                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
 272                         if (!b)
 273                                 {
 274                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 275                                 goto err;
 276                                 }
 277                         ret->dh_tmp->pub_key = b;
 278                         }
 279                 }
 280         ret->dh_tmp_cb = cert->dh_tmp_cb;
 281 #endif
 282
 283 #ifndef OPENSSL_NO_ECDH
 284         if (cert->ecdh_tmp)
 285                 {
 286                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 287                 if (ret->ecdh_tmp == NULL)
 288                         {
 289                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 290                         goto err;
 291                         }
 292                 }
 293         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 294         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 295 #endif
 296
 297         for (i = 0; i < SSL_PKEY_NUM; i++)
 298                 {
 299                 CERT_PKEY *cpk = cert->pkeys + i;
 300                 CERT_PKEY *rpk = ret->pkeys + i;
 301                 if (cpk->x509 != NULL)
 302                         {
 303                         rpk->x509 = cpk->x509;
 304                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 305                         }
 306
 307                 if (cpk->privatekey != NULL)
 308                         {
 309                         rpk->privatekey = cpk->privatekey;
 310                         CRYPTO_add(&cpk->privatekey->references, 1,
 311                                 CRYPTO_LOCK_EVP_PKEY);
 312
 313                         switch(i)
 314                                 {
 315                                 /* If there was anything special to do for
 316                                  * certain types of keys, we'd do it here.
 317                                  * (Nothing at the moment, I think.) */
 318
 319                         case SSL_PKEY_RSA_ENC:
 320                         case SSL_PKEY_RSA_SIGN:
 321                                 /* We have an RSA key. */
 322                                 break;
 323
 324                         case SSL_PKEY_DSA_SIGN:
 325                                 /* We have a DSA key. */
 326                                 break;
 327
 328                         case SSL_PKEY_DH_RSA:
 329                         case SSL_PKEY_DH_DSA:
 330                                 /* We have a DH key. */
 331                                 break;
 332
 333                         case SSL_PKEY_ECC:
 334                                 /* We have an ECC key */
 335                                 break;
 336
 337                         default:
 338                                 /* Can't happen. */
 339                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 340                                 }
 341                         }
 342
 343                 if (cpk->chain)
 344                         {
 345                         rpk->chain = X509_chain_up_ref(cpk->chain);
 346                         if (!rpk->chain)
 347                                 {
 348                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 349                                 goto err;
 350                                 }
 351                         }
 352                 rpk->valid_flags = 0;
 353 #ifndef OPENSSL_NO_TLSEXT
 354                 if (cert->pkeys[i].serverinfo != NULL)
 355                         {
 356                         /* Just copy everything. */
 357                         ret->pkeys[i].serverinfo =
 358                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 359                         if (ret->pkeys[i].serverinfo == NULL)
 360                                 {
 361                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 362                                 return NULL;
 363                                 }
 364                         ret->pkeys[i].serverinfo_length =
 365                                 cert->pkeys[i].serverinfo_length;
 366                         memcpy(ret->pkeys[i].serverinfo,
 367                                cert->pkeys[i].serverinfo,
 368                                cert->pkeys[i].serverinfo_length);
 369                         }
 370 #endif
 371                 }
 372
 373         ret->references=1;
 374         /* Set digests to defaults. NB: we don't copy existing values as they
 375          * will be set during handshake.
 376          */
 377         ssl_cert_set_default_md(ret);
 378         /* Peer sigalgs set to NULL as we get these from handshake too */
 379         ret->peer_sigalgs = NULL;
 380         ret->peer_sigalgslen = 0;
 381         /* Configured sigalgs however we copy across */
 382
 383         if (cert->conf_sigalgs)
 384                 {
 385                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 386                 if (!ret->conf_sigalgs)
 387                         goto err;
 388                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 389                                                 cert->conf_sigalgslen);
 390                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 391                 }
 392         else
 393                 ret->conf_sigalgs = NULL;
 394
 395         if (cert->client_sigalgs)
 396                 {
 397                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 398                 if (!ret->client_sigalgs)
 399                         goto err;
 400                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 401                                                 cert->client_sigalgslen);
 402                 ret->client_sigalgslen = cert->client_sigalgslen;
 403                 }
 404         else
 405                 ret->client_sigalgs = NULL;
 406         /* Shared sigalgs also NULL */
 407         ret->shared_sigalgs = NULL;
 408         /* Copy any custom client certificate types */
 409         if (cert->ctypes)
 410                 {
 411                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 412                 if (!ret->ctypes)
 413                         goto err;
 414                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 415                 ret->ctype_num = cert->ctype_num;
 416                 }
 417
 418         ret->cert_flags = cert->cert_flags;
 419
 420         ret->cert_cb = cert->cert_cb;
 421         ret->cert_cb_arg = cert->cert_cb_arg;
 422
 423         if (cert->verify_store)
 424                 {
 425                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 426                 ret->verify_store = cert->verify_store;
 427                 }
 428
 429         if (cert->chain_store)
 430                 {
 431                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 432                 ret->chain_store = cert->chain_store;
 433                 }
 434
 435         ret->ciphers_raw = NULL;
 436
 437         return(ret);
 438
 439 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 440 err:
 441 #endif
 442 #ifndef OPENSSL_NO_RSA
 443         if (ret->rsa_tmp != NULL)
 444                 RSA_free(ret->rsa_tmp);
 445 #endif
 446 #ifndef OPENSSL_NO_DH
 447         if (ret->dh_tmp != NULL)
 448                 DH_free(ret->dh_tmp);
 449 #endif
 450 #ifndef OPENSSL_NO_ECDH
 451         if (ret->ecdh_tmp != NULL)
 452                 EC_KEY_free(ret->ecdh_tmp);
 453 #endif
 454
 455         ssl_cert_clear_certs(ret);
 456
 457         return NULL;
 458         }
 459
 460 /* Free up and clear all certificates and chains */
 461
 462 void ssl_cert_clear_certs(CERT *c)
 463         {
 464         int i;
 465         if (c == NULL)
 466                 return;
 467         for (i = 0; i<SSL_PKEY_NUM; i++)
 468                 {
 469                 CERT_PKEY *cpk = c->pkeys + i;
 470                 if (cpk->x509)
 471                         {
 472                         X509_free(cpk->x509);
 473                         cpk->x509 = NULL;
 474                         }
 475                 if (cpk->privatekey)
 476                         {
 477                         EVP_PKEY_free(cpk->privatekey);
 478                         cpk->privatekey = NULL;
 479                         }
 480                 if (cpk->chain)
 481                         {
 482                         sk_X509_pop_free(cpk->chain, X509_free);
 483                         cpk->chain = NULL;
 484                         }
 485 #ifndef OPENSSL_NO_TLSEXT
 486                 if (cpk->serverinfo)
 487                         {
 488                         OPENSSL_free(cpk->serverinfo);
 489                         cpk->serverinfo = NULL;
 490                         cpk->serverinfo_length = 0;
 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 int ssl_cert_select_current(CERT *c, X509 *x)
 624         {
 625         int i;
 626         if (x == NULL)
 627                 return 0;
 628         for (i = 0; i < SSL_PKEY_NUM; i++)
 629                 {
 630                 if (c->pkeys[i].x509 == x)
 631                         {
 632                         c->key = &c->pkeys[i];
 633                         return 1;
 634                         }
 635                 }
 636
 637         for (i = 0; i < SSL_PKEY_NUM; i++)
 638                 {
 639                 if (c->pkeys[i].x509 && !X509_cmp(c->pkeys[i].x509, x))
 640                         {
 641                         c->key = &c->pkeys[i];
 642                         return 1;
 643                         }
 644                 }
 645         return 0;
 646         }
 647
 648 int ssl_cert_set_current(CERT *c, long op)
 649         {
 650         int i, idx;
 651         if (!c)
 652                 return 0;
 653         if (op == SSL_CERT_SET_FIRST)
 654                 idx = 0;
 655         else if (op == SSL_CERT_SET_NEXT)
 656                 {
 657                 idx = (int)(c->key - c->pkeys + 1);
 658                 if (idx >= SSL_PKEY_NUM)
 659                         return 0;
 660                 }
 661         else
 662                 return 0;
 663         for (i = idx; i < SSL_PKEY_NUM; i++)
 664                 {
 665                 if (c->pkeys[i].x509)
 666                         {
 667                         c->key = &c->pkeys[i];
 668                         return 1;
 669                         }
 670                 }
 671         return 0;
 672         }
 673
 674 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 675         {
 676         c->cert_cb = cb;
 677         c->cert_cb_arg = arg;
 678         }
 679
 680 SESS_CERT *ssl_sess_cert_new(void)
 681         {
 682         SESS_CERT *ret;
 683
 684         ret = OPENSSL_malloc(sizeof *ret);
 685         if (ret == NULL)
 686                 {
 687                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 688                 return NULL;
 689                 }
 690
 691         memset(ret, 0 ,sizeof *ret);
 692         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 693         ret->references = 1;
 694
 695         return ret;
 696         }
 697
 698 void ssl_sess_cert_free(SESS_CERT *sc)
 699         {
 700         int i;
 701
 702         if (sc == NULL)
 703                 return;
 704
 705         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 706 #ifdef REF_PRINT
 707         REF_PRINT("SESS_CERT", sc);
 708 #endif
 709         if (i > 0)
 710                 return;
 711 #ifdef REF_CHECK
 712         if (i < 0)
 713                 {
 714                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 715                 abort(); /* ok */
 716                 }
 717 #endif
 718
 719         /* i == 0 */
 720         if (sc->cert_chain != NULL)
 721                 sk_X509_pop_free(sc->cert_chain, X509_free);
 722         for (i = 0; i < SSL_PKEY_NUM; i++)
 723                 {
 724                 if (sc->peer_pkeys[i].x509 != NULL)
 725                         X509_free(sc->peer_pkeys[i].x509);
 726 #if 0 /* We don't have the peer's private key.  These lines are just
 727            * here as a reminder that we're still using a not-quite-appropriate
 728            * data structure. */
 729                 if (sc->peer_pkeys[i].privatekey != NULL)
 730                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 731 #endif
 732                 }
 733
 734 #ifndef OPENSSL_NO_RSA
 735         if (sc->peer_rsa_tmp != NULL)
 736                 RSA_free(sc->peer_rsa_tmp);
 737 #endif
 738 #ifndef OPENSSL_NO_DH
 739         if (sc->peer_dh_tmp != NULL)
 740                 DH_free(sc->peer_dh_tmp);
 741 #endif
 742 #ifndef OPENSSL_NO_ECDH
 743         if (sc->peer_ecdh_tmp != NULL)
 744                 EC_KEY_free(sc->peer_ecdh_tmp);
 745 #endif
 746
 747         OPENSSL_free(sc);
 748         }
 749
 750 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 751         {
 752         sc->peer_cert_type = type;
 753         return(1);
 754         }
 755
 756 #ifndef OPENSSL_NO_DANE
 757 static void tlsa_free(void *parent,void *ptr,CRYPTO_EX_DATA *ad,int idx,long argl,void *argp)
 758         {
 759         TLSA_EX_DATA *ex = ptr;
 760
 761         if (ex!=NULL)
 762                 {
 763                 if (ex->tlsa_record!=NULL && ex->tlsa_record!=(void *)-1)
 764                         OPENSSL_free(ex->tlsa_record);
 765
 766                 OPENSSL_free(ex);
 767                 }
 768         }
 769
 770 int SSL_get_TLSA_ex_data_idx(void)
 771     {
 772     static volatile int ssl_tlsa_idx= -1;
 773     int got_write_lock = 0;
 774
 775     if (((size_t)&ssl_tlsa_idx&(sizeof(ssl_tlsa_idx)-1))
 776                 ==0)    /* check alignment, practically always true */
 777         {
 778         int ret;
 779
 780         if ((ret=ssl_tlsa_idx) < 0)
 781                 {
 782                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 783                 if ((ret=ssl_tlsa_idx) < 0)
 784                         {
 785                         ret=ssl_tlsa_idx=SSL_get_ex_new_index(
 786                                 0,"per-SSL TLSA",NULL,NULL,tlsa_free);
 787                         }
 788                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 789                 }
 790
 791         return ret;
 792         }
 793     else                /* commonly eliminated */
 794         {
 795         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 796
 797         if (ssl_tlsa_idx < 0)
 798                 {
 799                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 800                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 801                 got_write_lock = 1;
 802
 803                 if (ssl_tlsa_idx < 0)
 804                         {
 805                         ssl_tlsa_idx=SSL_get_ex_new_index(
 806                                 0,"pre-SSL TLSA",NULL,NULL,tlsa_free);
 807                         }
 808                 }
 809
 810         if (got_write_lock)
 811                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 812         else
 813                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 814
 815         return ssl_tlsa_idx;
 816         }
 817     }
 818
 819 TLSA_EX_DATA *SSL_get_TLSA_ex_data(SSL *ssl)
 820         {
 821         int idx = SSL_get_TLSA_ex_data_idx();
 822         TLSA_EX_DATA *ex;
 823
 824         if ((ex=SSL_get_ex_data(ssl,idx)) == NULL)
 825                 {
 826                 ex = OPENSSL_malloc(sizeof(TLSA_EX_DATA));
 827                 ex->tlsa_record = NULL;
 828                 ex->tlsa_witness = -1;
 829                 SSL_set_ex_data(ssl,idx,ex);
 830                 }
 831
 832         return ex;
 833         }
 834
 835 /*
 836  * return value:
 837  * -1:  format or digest error
 838  *  0:  match
 839  *  1:  no match
 840  */
 841 static int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record, unsigned int reclen)
 842         {
 843         const EVP_MD *md;
 844         unsigned char digest[EVP_MAX_MD_SIZE];
 845         unsigned int len, selector, matching_type;
 846         int ret;
 847
 848         if (reclen<3 || tlsa_record[0]>3)       return -1;
 849
 850         selector      = tlsa_record[1];
 851         matching_type = tlsa_record[2];
 852         tlsa_record   += 3;
 853         reclen        -= 3;
 854
 855         switch (matching_type) {
 856         case 0:                         /* exact match */
 857                 if (selector==0) {      /* full certificate */
 858                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 859                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 860                 }
 861                 else if (selector==1) { /* SubjectPublicKeyInfo */
 862                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 863
 864                         if (key == NULL) return -1;
 865                         if (key->length != reclen) return 1;
 866
 867                         return memcmp(key->data,tlsa_record,reclen)!=0;
 868                 }
 869                 return -1;
 870
 871         case 1:                         /* SHA256 */
 872         case 2:                         /* SHA512 */
 873                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 874
 875                 if (reclen!=EVP_MD_size(md)) return -1;
 876
 877                 if (selector==0) {      /* full certificate */
 878                         ret = X509_digest(cert,md,digest,&len);
 879                 }
 880                 else if (selector==1) { /* SubjectPublicKeyInfo */
 881                         ret = X509_pubkey_digest(cert,md,digest,&len);
 882                 }
 883                 else
 884                         return -1;
 885
 886                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 887         default:
 888                 return -1;
 889         }
 890         }
 891
 892 static int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 893         {
 894         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 895         int depth=X509_STORE_CTX_get_error_depth(ctx);
 896         X509 *cert = sk_X509_value(ctx->chain,depth);
 897         TLSA_EX_DATA *ex;
 898         const unsigned char *tlsa_record;
 899         int tlsa_ret=-1, mask=1;
 900
 901
 902         if ((ex=SSL_get_ex_data(s, SSL_get_TLSA_ex_data_idx())) == NULL ||
 903             (tlsa_record=ex->tlsa_record) == NULL ||
 904             (tlsa_record==(void *)-1 && (ok=0,ctx->error=X509_V_ERR_INVALID_CA)) ||     /* temporary code? */
 905             /*
 906              * X509_verify_cert initially starts throwing ok=0 upon
 907              * failure to build certificate chain. As all certificate
 908              * usages except for 3 require verifiable chain, ok=0 at
 909              * non-zero depth is fatal. More specifically ok=0 at zero
 910              * depth is allowed only for usage 3. Special note about
 911              * usage 2. The chain is supposed to be filled by
 912              * dane_get_issuer, or once again we should tolerate ok=0
 913              * only in usage 3 case.
 914              */
 915             (!ok && depth!=0)) {
 916                 if (s->verify_callback) return s->verify_callback(ok,ctx);
 917                 else                    return ok;
 918         }
 919
 920         while (1) {
 921             unsigned int reclen, certificate_usage;
 922
 923             memcpy(&reclen,tlsa_record,sizeof(reclen));
 924
 925             if (reclen==0) break;
 926
 927             tlsa_record += sizeof(reclen);
 928
 929             if (!(ex->tlsa_mask&mask))  { /* not matched yet */
 930                 /*
 931                  * tlsa_record[0]       Certificate Usage field
 932                  * tlsa_record[1]       Selector field
 933                  * tlsa_record[2]       Matching Type Field
 934                  * tlsa_record+3        Certificate Association data
 935                  */
 936                 certificate_usage = tlsa_record[0];
 937
 938                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 939                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 940                         if (tlsa_ret==0) {
 941                                 ex->tlsa_witness = depth<<8|certificate_usage;
 942                                 ex->tlsa_mask |= mask;
 943                                 break;
 944                         }
 945                         else if (tlsa_ret==-1) {
 946                                 ex->tlsa_witness = -1;  /* something phishy? */
 947                                 ex->tlsa_mask |= mask;
 948                         }
 949                 }
 950
 951             }
 952             tlsa_record += reclen;
 953             mask <<= 1;
 954         }
 955
 956         if (depth==0) {
 957                 if (ex->tlsa_witness==-1)       /* no match */
 958                         ctx->error = X509_V_ERR_CERT_UNTRUSTED, ok=0;
 959                 else
 960                         ctx->error = X509_V_OK, ok=1;
 961         }
 962
 963         if (s->verify_callback) return s->verify_callback(ok,ctx);
 964         else                    return ok;
 965         }
 966
 967 static int dane_get_issuer(X509 **issuer,X509_STORE_CTX *ctx,X509 *x)
 968         {
 969         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 970         TLSA_EX_DATA *ex=SSL_get_ex_data(s, SSL_get_TLSA_ex_data_idx());
 971
 972         /* XXX TODO */
 973
 974         return ex->get_issuer(issuer,ctx,x);
 975         }
 976 #endif
 977
 978 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 979         {
 980         X509 *x;
 981         int i;
 982         X509_STORE *verify_store;
 983         X509_STORE_CTX ctx;
 984 #ifndef OPENSSL_NO_DANE
 985         TLSA_EX_DATA *ex;
 986 #endif
 987
 988         if (s->cert->verify_store)
 989                 verify_store = s->cert->verify_store;
 990         else
 991                 verify_store = s->ctx->cert_store;
 992
 993         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 994                 return(0);
 995
 996         x=sk_X509_value(sk,0);
 997         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 998                 {
 999                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
1000                 return(0);
1001                 }
1002         /* Set suite B flags if needed */
1003         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
1004 #if 0
1005         if (SSL_get_verify_depth(s) >= 0)
1006                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
1007 #endif
1008         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
1009
1010         /* We need to inherit the verify parameters. These can be determined by
1011          * the context: if its a server it will verify SSL client certificates
1012          * or vice versa.
1013          */
1014
1015         X509_STORE_CTX_set_default(&ctx,
1016                                 s->server ? "ssl_client" : "ssl_server");
1017         /* Anything non-default in "param" should overwrite anything in the
1018          * ctx.
1019          */
1020         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
1021
1022 #ifndef OPENSSL_NO_DANE
1023         if (!s->server &&
1024             (ex=SSL_get_ex_data(s, SSL_get_TLSA_ex_data_idx()))!=NULL)
1025                 {
1026                 const unsigned char *tlsa_record = ex->tlsa_record;
1027
1028                 /*
1029                  * See if there are usable certificates we can add
1030                  * to chain.
1031                  */
1032                 while (tlsa_record!=(void *)-1)
1033                         {
1034                         unsigned int reclen;
1035
1036                         memcpy (&reclen,tlsa_record,sizeof(reclen));
1037
1038                         if (reclen==0)  break;
1039
1040                         tlsa_record += sizeof(reclen);
1041
1042                         if (tlsa_record[0]==2 &&
1043                             tlsa_record[1]==0 && /* full certificate */
1044                             tlsa_record[2]==0)   /* itself */
1045                                 {
1046                                 ex->get_issuer = ctx.get_issuer;
1047                                 ctx.get_issuer = dane_get_issuer;
1048
1049                                 break;
1050                                 }
1051                         tlsa_record += reclen;
1052                         }
1053
1054                 ex->tlsa_mask = 0;
1055                 ex->tlsa_witness = -1;
1056                 X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
1057                 }
1058         else
1059 #endif
1060         if (s->verify_callback)
1061                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
1062
1063         if (s->ctx->app_verify_callback != NULL)
1064 #if 1 /* new with OpenSSL 0.9.7 */
1065                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
1066 #else
1067                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
1068 #endif
1069         else
1070                 {
1071 #ifndef OPENSSL_NO_X509_VERIFY
1072                 i=X509_verify_cert(&ctx);
1073 #else
1074                 i=0;
1075                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
1076                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
1077 #endif
1078                 }
1079
1080         s->verify_result=ctx.error;
1081         X509_STORE_CTX_cleanup(&ctx);
1082
1083         return(i);
1084         }
1085
1086 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
1087         {
1088         if (*ca_list != NULL)
1089                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
1090
1091         *ca_list=name_list;
1092         }
1093
1094 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
1095         {
1096         int i;
1097         STACK_OF(X509_NAME) *ret;
1098         X509_NAME *name;
1099
1100         ret=sk_X509_NAME_new_null();
1101         for (i=0; i<sk_X509_NAME_num(sk); i++)
1102                 {
1103                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
1104                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
1105                         {
1106                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
1107                         return(NULL);
1108                         }
1109                 }
1110         return(ret);
1111         }
1112
1113 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
1114         {
1115         set_client_CA_list(&(s->client_CA),name_list);
1116         }
1117
1118 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
1119         {
1120         set_client_CA_list(&(ctx->client_CA),name_list);
1121         }
1122
1123 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
1124         {
1125         return(ctx->client_CA);
1126         }
1127
1128 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
1129         {
1130         if (s->type == SSL_ST_CONNECT)
1131                 { /* we are in the client */
1132                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
1133                         (s->s3 != NULL))
1134                         return(s->s3->tmp.ca_names);
1135                 else
1136                         return(NULL);
1137                 }
1138         else
1139                 {
1140                 if (s->client_CA != NULL)
1141                         return(s->client_CA);
1142                 else
1143                         return(s->ctx->client_CA);
1144                 }
1145         }
1146
1147 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
1148         {
1149         X509_NAME *name;
1150
1151         if (x == NULL) return(0);
1152         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
1153                 return(0);
1154
1155         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
1156                 return(0);
1157
1158         if (!sk_X509_NAME_push(*sk,name))
1159                 {
1160                 X509_NAME_free(name);
1161                 return(0);
1162                 }
1163         return(1);
1164         }
1165
1166 int SSL_add_client_CA(SSL *ssl,X509 *x)
1167         {
1168         return(add_client_CA(&(ssl->client_CA),x));
1169         }
1170
1171 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
1172         {
1173         return(add_client_CA(&(ctx->client_CA),x));
1174         }
1175
1176 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1177         {
1178         return(X509_NAME_cmp(*a,*b));
1179         }
1180
1181 #ifndef OPENSSL_NO_STDIO
1182 /*!
1183  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
1184  * it doesn't really have anything to do with clients (except that a common use
1185  * for a stack of CAs is to send it to the client). Actually, it doesn't have
1186  * much to do with CAs, either, since it will load any old cert.
1187  * \param file the file containing one or more certs.
1188  * \return a ::STACK containing the certs.
1189  */
1190 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
1191         {
1192         BIO *in;
1193         X509 *x=NULL;
1194         X509_NAME *xn=NULL;
1195         STACK_OF(X509_NAME) *ret = NULL,*sk;
1196
1197         sk=sk_X509_NAME_new(xname_cmp);
1198
1199         in=BIO_new(BIO_s_file_internal());
1200
1201         if ((sk == NULL) || (in == NULL))
1202                 {
1203                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1204                 goto err;
1205                 }
1206
1207         if (!BIO_read_filename(in,file))
1208                 goto err;
1209
1210         for (;;)
1211                 {
1212                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1213                         break;
1214                 if (ret == NULL)
1215                         {
1216                         ret = sk_X509_NAME_new_null();
1217                         if (ret == NULL)
1218                                 {
1219                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1220                                 goto err;
1221                                 }
1222                         }
1223                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1224                 /* check for duplicates */
1225                 xn=X509_NAME_dup(xn);
1226                 if (xn == NULL) goto err;
1227                 if (sk_X509_NAME_find(sk,xn) >= 0)
1228                         X509_NAME_free(xn);
1229                 else
1230                         {
1231                         sk_X509_NAME_push(sk,xn);
1232                         sk_X509_NAME_push(ret,xn);
1233                         }
1234                 }
1235
1236         if (0)
1237                 {
1238 err:
1239                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1240                 ret=NULL;
1241                 }
1242         if (sk != NULL) sk_X509_NAME_free(sk);
1243         if (in != NULL) BIO_free(in);
1244         if (x != NULL) X509_free(x);
1245         if (ret != NULL)
1246                 ERR_clear_error();
1247         return(ret);
1248         }
1249 #endif
1250
1251 /*!
1252  * Add a file of certs to a stack.
1253  * \param stack the stack to add to.
1254  * \param file the file to add from. All certs in this file that are not
1255  * already in the stack will be added.
1256  * \return 1 for success, 0 for failure. Note that in the case of failure some
1257  * certs may have been added to \c stack.
1258  */
1259
1260 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1261                                         const char *file)
1262         {
1263         BIO *in;
1264         X509 *x=NULL;
1265         X509_NAME *xn=NULL;
1266         int ret=1;
1267         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1268
1269         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1270
1271         in=BIO_new(BIO_s_file_internal());
1272
1273         if (in == NULL)
1274                 {
1275                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1276                 goto err;
1277                 }
1278
1279         if (!BIO_read_filename(in,file))
1280                 goto err;
1281
1282         for (;;)
1283                 {
1284                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1285                         break;
1286                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1287                 xn=X509_NAME_dup(xn);
1288                 if (xn == NULL) goto err;
1289                 if (sk_X509_NAME_find(stack,xn) >= 0)
1290                         X509_NAME_free(xn);
1291                 else
1292                         sk_X509_NAME_push(stack,xn);
1293                 }
1294
1295         ERR_clear_error();
1296
1297         if (0)
1298                 {
1299 err:
1300                 ret=0;
1301                 }
1302         if(in != NULL)
1303                 BIO_free(in);
1304         if(x != NULL)
1305                 X509_free(x);
1306
1307         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1308
1309         return ret;
1310         }
1311
1312 /*!
1313  * Add a directory of certs to a stack.
1314  * \param stack the stack to append to.
1315  * \param dir the directory to append from. All files in this directory will be
1316  * examined as potential certs. Any that are acceptable to
1317  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1318  * included.
1319  * \return 1 for success, 0 for failure. Note that in the case of failure some
1320  * certs may have been added to \c stack.
1321  */
1322
1323 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1324                                        const char *dir)
1325         {
1326         OPENSSL_DIR_CTX *d = NULL;
1327         const char *filename;
1328         int ret = 0;
1329
1330         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1331
1332         /* Note that a side effect is that the CAs will be sorted by name */
1333
1334         while((filename = OPENSSL_DIR_read(&d, dir)))
1335                 {
1336                 char buf[1024];
1337                 int r;
1338
1339                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1340                         {
1341                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1342                         goto err;
1343                         }
1344
1345 #ifdef OPENSSL_SYS_VMS
1346                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1347 #else
1348                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1349 #endif
1350                 if (r <= 0 || r >= (int)sizeof(buf))
1351                         goto err;
1352                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1353                         goto err;
1354                 }
1355
1356         if (errno)
1357                 {
1358                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1359                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1360                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1361                 goto err;
1362                 }
1363
1364         ret = 1;
1365
1366 err:
1367         if (d) OPENSSL_DIR_end(&d);
1368         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1369         return ret;
1370         }
1371
1372 /* Add a certificate to a BUF_MEM structure */
1373
1374 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1375         {
1376         int n;
1377         unsigned char *p;
1378
1379         n=i2d_X509(x,NULL);
1380         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1381                 {
1382                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1383                 return 0;
1384                 }
1385         p=(unsigned char *)&(buf->data[*l]);
1386         l2n3(n,p);
1387         i2d_X509(x,&p);
1388         *l+=n+3;
1389
1390         return 1;
1391         }
1392
1393 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1394 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1395         {
1396         BUF_MEM *buf = s->init_buf;
1397         int no_chain;
1398         int i;
1399
1400         X509 *x;
1401         STACK_OF(X509) *extra_certs;
1402         X509_STORE *chain_store;
1403
1404         if (cpk)
1405                 x = cpk->x509;
1406         else
1407                 x = NULL;
1408
1409         if (s->cert->chain_store)
1410                 chain_store = s->cert->chain_store;
1411         else
1412                 chain_store = s->ctx->cert_store;
1413
1414         /* If we have a certificate specific chain use it, else use
1415          * parent ctx.
1416          */
1417         if (cpk && cpk->chain)
1418                 extra_certs = cpk->chain;
1419         else
1420                 extra_certs = s->ctx->extra_certs;
1421
1422         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1423                 no_chain = 1;
1424         else
1425                 no_chain = 0;
1426
1427         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1428         if (!BUF_MEM_grow_clean(buf,10))
1429                 {
1430                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1431                 return 0;
1432                 }
1433         if (x != NULL)
1434                 {
1435                 if (no_chain)
1436                         {
1437                         if (!ssl_add_cert_to_buf(buf, l, x))
1438                                 return 0;
1439                         }
1440                 else
1441                         {
1442                         X509_STORE_CTX xs_ctx;
1443
1444                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1445                                 {
1446                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1447                                 return(0);
1448                                 }
1449                         X509_verify_cert(&xs_ctx);
1450                         /* Don't leave errors in the queue */
1451                         ERR_clear_error();
1452                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1453                                 {
1454                                 x = sk_X509_value(xs_ctx.chain, i);
1455
1456                                 if (!ssl_add_cert_to_buf(buf, l, x))
1457                                         {
1458                                         X509_STORE_CTX_cleanup(&xs_ctx);
1459                                         return 0;
1460                                         }
1461                                 }
1462                         X509_STORE_CTX_cleanup(&xs_ctx);
1463                         }
1464                 }
1465         for (i=0; i<sk_X509_num(extra_certs); i++)
1466                 {
1467                 x=sk_X509_value(extra_certs,i);
1468                 if (!ssl_add_cert_to_buf(buf, l, x))
1469                         return 0;
1470                 }
1471
1472         return 1;
1473         }
1474
1475 /* Build a certificate chain for current certificate */
1476 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1477         {
1478         CERT_PKEY *cpk = c->key;
1479         X509_STORE_CTX xs_ctx;
1480         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1481         X509 *x;
1482         int i, rv = 0;
1483
1484         if (!cpk->x509)
1485                 {
1486                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1487                 goto err;
1488                 }
1489         /* Rearranging and check the chain: add everything to a store */
1490         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1491                 {
1492                 chain_store = X509_STORE_new();
1493                 if (!chain_store)
1494                         goto err;
1495                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1496                         {
1497                         x = sk_X509_value(cpk->chain, i);
1498                         if (!X509_STORE_add_cert(chain_store, x))
1499                                 goto err;
1500                         }
1501                 /* Add EE cert too: it might be self signed */
1502                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1503                         goto err;
1504                 }
1505         else
1506                 {
1507                 if (c->chain_store)
1508                         chain_store = c->chain_store;
1509
1510                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1511                         untrusted = cpk->chain;
1512                 }
1513
1514         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1515                 {
1516                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1517                 goto err;
1518                 }
1519         /* Set suite B flags if needed */
1520         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1521
1522         i = X509_verify_cert(&xs_ctx);
1523         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1524                 {
1525                 ERR_clear_error();
1526                 i = 1;
1527                 }
1528         if (i > 0)
1529                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1530         if (i <= 0)
1531                 {
1532                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1533                 i = X509_STORE_CTX_get_error(&xs_ctx);
1534                 ERR_add_error_data(2, "Verify error:",
1535                                         X509_verify_cert_error_string(i));
1536
1537                 X509_STORE_CTX_cleanup(&xs_ctx);
1538                 goto err;
1539                 }
1540         X509_STORE_CTX_cleanup(&xs_ctx);
1541         if (cpk->chain)
1542                 sk_X509_pop_free(cpk->chain, X509_free);
1543         /* Remove EE certificate from chain */
1544         x = sk_X509_shift(chain);
1545         X509_free(x);
1546         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1547                 {
1548                 if (sk_X509_num(chain) > 0)
1549                         {
1550                         /* See if last cert is self signed */
1551                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1552                         X509_check_purpose(x, -1, 0);
1553                         if (x->ex_flags & EXFLAG_SS)
1554                                 {
1555                                 x = sk_X509_pop(chain);
1556                                 X509_free(x);
1557                                 }
1558                         }
1559                 }
1560         cpk->chain = chain;
1561         rv = 1;
1562         err:
1563         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1564                 X509_STORE_free(chain_store);
1565
1566         return rv;
1567         }
1568
1569 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1570         {
1571         X509_STORE **pstore;
1572         if (chain)
1573                 pstore = &c->chain_store;
1574         else
1575                 pstore = &c->verify_store;
1576         if (*pstore)
1577                 X509_STORE_free(*pstore);
1578         *pstore = store;
1579         if (ref && store)
1580                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1581         return 1;
1582         }
1583