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                 CERT_PKEY *cpk = c->pkeys + i;
 631                 if (cpk->x509 == x && cpk->privatekey)
 632                         {
 633                         c->key = cpk;
 634                         return 1;
 635                         }
 636                 }
 637
 638         for (i = 0; i < SSL_PKEY_NUM; i++)
 639                 {
 640                 CERT_PKEY *cpk = c->pkeys + i;
 641                 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
 642                         {
 643                         c->key = cpk;
 644                         return 1;
 645                         }
 646                 }
 647         return 0;
 648         }
 649
 650 int ssl_cert_set_current(CERT *c, long op)
 651         {
 652         int i, idx;
 653         if (!c)
 654                 return 0;
 655         if (op == SSL_CERT_SET_FIRST)
 656                 idx = 0;
 657         else if (op == SSL_CERT_SET_NEXT)
 658                 {
 659                 idx = (int)(c->key - c->pkeys + 1);
 660                 if (idx >= SSL_PKEY_NUM)
 661                         return 0;
 662                 }
 663         else
 664                 return 0;
 665         for (i = idx; i < SSL_PKEY_NUM; i++)
 666                 {
 667                 CERT_PKEY *cpk = c->pkeys + i;
 668                 if (cpk->x509 && cpk->privatekey)
 669                         {
 670                         c->key = cpk;
 671                         return 1;
 672                         }
 673                 }
 674         return 0;
 675         }
 676
 677 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 678         {
 679         c->cert_cb = cb;
 680         c->cert_cb_arg = arg;
 681         }
 682
 683 SESS_CERT *ssl_sess_cert_new(void)
 684         {
 685         SESS_CERT *ret;
 686
 687         ret = OPENSSL_malloc(sizeof *ret);
 688         if (ret == NULL)
 689                 {
 690                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 691                 return NULL;
 692                 }
 693
 694         memset(ret, 0 ,sizeof *ret);
 695         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 696         ret->references = 1;
 697
 698         return ret;
 699         }
 700
 701 void ssl_sess_cert_free(SESS_CERT *sc)
 702         {
 703         int i;
 704
 705         if (sc == NULL)
 706                 return;
 707
 708         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 709 #ifdef REF_PRINT
 710         REF_PRINT("SESS_CERT", sc);
 711 #endif
 712         if (i > 0)
 713                 return;
 714 #ifdef REF_CHECK
 715         if (i < 0)
 716                 {
 717                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 718                 abort(); /* ok */
 719                 }
 720 #endif
 721
 722         /* i == 0 */
 723         if (sc->cert_chain != NULL)
 724                 sk_X509_pop_free(sc->cert_chain, X509_free);
 725         for (i = 0; i < SSL_PKEY_NUM; i++)
 726                 {
 727                 if (sc->peer_pkeys[i].x509 != NULL)
 728                         X509_free(sc->peer_pkeys[i].x509);
 729 #if 0 /* We don't have the peer's private key.  These lines are just
 730            * here as a reminder that we're still using a not-quite-appropriate
 731            * data structure. */
 732                 if (sc->peer_pkeys[i].privatekey != NULL)
 733                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 734 #endif
 735                 }
 736
 737 #ifndef OPENSSL_NO_RSA
 738         if (sc->peer_rsa_tmp != NULL)
 739                 RSA_free(sc->peer_rsa_tmp);
 740 #endif
 741 #ifndef OPENSSL_NO_DH
 742         if (sc->peer_dh_tmp != NULL)
 743                 DH_free(sc->peer_dh_tmp);
 744 #endif
 745 #ifndef OPENSSL_NO_ECDH
 746         if (sc->peer_ecdh_tmp != NULL)
 747                 EC_KEY_free(sc->peer_ecdh_tmp);
 748 #endif
 749
 750         OPENSSL_free(sc);
 751         }
 752
 753 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 754         {
 755         sc->peer_cert_type = type;
 756         return(1);
 757         }
 758
 759 #ifndef OPENSSL_NO_DANE
 760 static void tlsa_free(void *parent,void *ptr,CRYPTO_EX_DATA *ad,int idx,long argl,void *argp)
 761         {
 762         TLSA_EX_DATA *ex = ptr;
 763
 764         if (ex!=NULL)
 765                 {
 766                 if (ex->tlsa_record!=NULL && ex->tlsa_record!=(void *)-1)
 767                         OPENSSL_free(ex->tlsa_record);
 768
 769                 OPENSSL_free(ex);
 770                 }
 771         }
 772
 773 int SSL_get_TLSA_ex_data_idx(void)
 774     {
 775     static volatile int ssl_tlsa_idx= -1;
 776     int got_write_lock = 0;
 777
 778     if (((size_t)&ssl_tlsa_idx&(sizeof(ssl_tlsa_idx)-1))
 779                 ==0)    /* check alignment, practically always true */
 780         {
 781         int ret;
 782
 783         if ((ret=ssl_tlsa_idx) < 0)
 784                 {
 785                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 786                 if ((ret=ssl_tlsa_idx) < 0)
 787                         {
 788                         ret=ssl_tlsa_idx=SSL_get_ex_new_index(
 789                                 0,"per-SSL TLSA",NULL,NULL,tlsa_free);
 790                         }
 791                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 792                 }
 793
 794         return ret;
 795         }
 796     else                /* commonly eliminated */
 797         {
 798         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 799
 800         if (ssl_tlsa_idx < 0)
 801                 {
 802                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 803                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 804                 got_write_lock = 1;
 805
 806                 if (ssl_tlsa_idx < 0)
 807                         {
 808                         ssl_tlsa_idx=SSL_get_ex_new_index(
 809                                 0,"pre-SSL TLSA",NULL,NULL,tlsa_free);
 810                         }
 811                 }
 812
 813         if (got_write_lock)
 814                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 815         else
 816                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 817
 818         return ssl_tlsa_idx;
 819         }
 820     }
 821
 822 TLSA_EX_DATA *SSL_get_TLSA_ex_data(SSL *ssl)
 823         {
 824         int idx = SSL_get_TLSA_ex_data_idx();
 825         TLSA_EX_DATA *ex;
 826
 827         if ((ex=SSL_get_ex_data(ssl,idx)) == NULL)
 828                 {
 829                 ex = OPENSSL_malloc(sizeof(TLSA_EX_DATA));
 830                 ex->tlsa_record = NULL;
 831                 ex->tlsa_witness = -1;
 832                 SSL_set_ex_data(ssl,idx,ex);
 833                 }
 834
 835         return ex;
 836         }
 837
 838 /*
 839  * return value:
 840  * -1:  format or digest error
 841  *  0:  match
 842  *  1:  no match
 843  */
 844 static int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record,
 845                     int reclen)
 846         {
 847         const EVP_MD *md;
 848         unsigned char digest[EVP_MAX_MD_SIZE];
 849         unsigned int len, selector, matching_type;
 850         int ret;
 851
 852         if (reclen<3 || tlsa_record[0]>3)       return -1;
 853
 854         selector      = tlsa_record[1];
 855         matching_type = tlsa_record[2];
 856         tlsa_record   += 3;
 857         reclen        -= 3;
 858
 859         switch (matching_type) {
 860         case 0:                         /* exact match */
 861                 if (selector==0) {      /* full certificate */
 862                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 863                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 864                 }
 865                 else if (selector==1) { /* SubjectPublicKeyInfo */
 866                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 867
 868                         if (key == NULL) return -1;
 869                         if (key->length != reclen) return 1;
 870
 871                         return memcmp(key->data,tlsa_record,reclen)!=0;
 872                 }
 873                 return -1;
 874
 875         case 1:                         /* SHA256 */
 876         case 2:                         /* SHA512 */
 877                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 878
 879                 if (reclen!=EVP_MD_size(md)) return -1;
 880
 881                 if (selector==0) {      /* full certificate */
 882                         ret = X509_digest(cert,md,digest,&len);
 883                 }
 884                 else if (selector==1) { /* SubjectPublicKeyInfo */
 885                         ret = X509_pubkey_digest(cert,md,digest,&len);
 886                 }
 887                 else
 888                         return -1;
 889
 890                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 891         default:
 892                 return -1;
 893         }
 894         }
 895
 896 static int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 897         {
 898         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 899         int depth=X509_STORE_CTX_get_error_depth(ctx);
 900         X509 *cert = sk_X509_value(ctx->chain,depth);
 901         TLSA_EX_DATA *ex;
 902         const unsigned char *tlsa_record;
 903         int tlsa_ret=-1, mask=1;
 904
 905
 906         if ((ex=SSL_get_ex_data(s, SSL_get_TLSA_ex_data_idx())) == NULL ||
 907             (tlsa_record=ex->tlsa_record) == NULL ||
 908             (tlsa_record==(void *)-1 && (ok=0,ctx->error=X509_V_ERR_INVALID_CA)) ||     /* temporary code? */
 909             /*
 910              * X509_verify_cert initially starts throwing ok=0 upon
 911              * failure to build certificate chain. As all certificate
 912              * usages except for 3 require verifiable chain, ok=0 at
 913              * non-zero depth is fatal. More specifically ok=0 at zero
 914              * depth is allowed only for usage 3. Special note about
 915              * usage 2. The chain is supposed to be filled by
 916              * dane_get_issuer, or once again we should tolerate ok=0
 917              * only in usage 3 case.
 918              */
 919             (!ok && depth!=0)) {
 920                 if (s->verify_callback) return s->verify_callback(ok,ctx);
 921                 else                    return ok;
 922         }
 923
 924         while (1) {
 925             unsigned int reclen, certificate_usage;
 926
 927             memcpy(&reclen,tlsa_record,sizeof(reclen));
 928
 929             if (reclen==0) break;
 930
 931             tlsa_record += sizeof(reclen);
 932
 933             if (!(ex->tlsa_mask&mask))  { /* not matched yet */
 934                 /*
 935                  * tlsa_record[0]       Certificate Usage field
 936                  * tlsa_record[1]       Selector field
 937                  * tlsa_record[2]       Matching Type Field
 938                  * tlsa_record+3        Certificate Association data
 939                  */
 940                 certificate_usage = tlsa_record[0];
 941
 942                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 943                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 944                         if (tlsa_ret==0) {
 945                                 ex->tlsa_witness = depth<<8|certificate_usage;
 946                                 ex->tlsa_mask |= mask;
 947                                 break;
 948                         }
 949                         else if (tlsa_ret==-1) {
 950                                 ex->tlsa_witness = -1;  /* something phishy? */
 951                                 ex->tlsa_mask |= mask;
 952                         }
 953                 }
 954
 955             }
 956             tlsa_record += reclen;
 957             mask <<= 1;
 958         }
 959
 960         if (depth==0) {
 961                 if (ex->tlsa_witness==-1)       /* no match */
 962                         ctx->error = X509_V_ERR_CERT_UNTRUSTED, ok=0;
 963                 else
 964                         ctx->error = X509_V_OK, ok=1;
 965         }
 966
 967         if (s->verify_callback) return s->verify_callback(ok,ctx);
 968         else                    return ok;
 969         }
 970
 971 static int dane_get_issuer(X509 **issuer,X509_STORE_CTX *ctx,X509 *x)
 972         {
 973         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 974         TLSA_EX_DATA *ex=SSL_get_ex_data(s, SSL_get_TLSA_ex_data_idx());
 975
 976         /* XXX TODO */
 977
 978         return ex->get_issuer(issuer,ctx,x);
 979         }
 980 #endif
 981
 982 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 983         {
 984         X509 *x;
 985         int i;
 986         X509_STORE *verify_store;
 987         X509_STORE_CTX ctx;
 988 #ifndef OPENSSL_NO_DANE
 989         TLSA_EX_DATA *ex;
 990 #endif
 991
 992         if (s->cert->verify_store)
 993                 verify_store = s->cert->verify_store;
 994         else
 995                 verify_store = s->ctx->cert_store;
 996
 997         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 998                 return(0);
 999
1000         x=sk_X509_value(sk,0);
1001         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
1002                 {
1003                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
1004                 return(0);
1005                 }
1006         /* Set suite B flags if needed */
1007         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
1008 #if 0
1009         if (SSL_get_verify_depth(s) >= 0)
1010                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
1011 #endif
1012         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
1013
1014         /* We need to inherit the verify parameters. These can be determined by
1015          * the context: if its a server it will verify SSL client certificates
1016          * or vice versa.
1017          */
1018
1019         X509_STORE_CTX_set_default(&ctx,
1020                                 s->server ? "ssl_client" : "ssl_server");
1021         /* Anything non-default in "param" should overwrite anything in the
1022          * ctx.
1023          */
1024         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
1025
1026 #ifndef OPENSSL_NO_DANE
1027         if (!s->server &&
1028             (ex=SSL_get_ex_data(s, SSL_get_TLSA_ex_data_idx()))!=NULL)
1029                 {
1030                 const unsigned char *tlsa_record = ex->tlsa_record;
1031
1032                 /*
1033                  * See if there are usable certificates we can add
1034                  * to chain.
1035                  */
1036                 while (tlsa_record!=(void *)-1)
1037                         {
1038                         unsigned int reclen;
1039
1040                         memcpy (&reclen,tlsa_record,sizeof(reclen));
1041
1042                         if (reclen==0)  break;
1043
1044                         tlsa_record += sizeof(reclen);
1045
1046                         if (tlsa_record[0]==2 &&
1047                             tlsa_record[1]==0 && /* full certificate */
1048                             tlsa_record[2]==0)   /* itself */
1049                                 {
1050                                 ex->get_issuer = ctx.get_issuer;
1051                                 ctx.get_issuer = dane_get_issuer;
1052
1053                                 break;
1054                                 }
1055                         tlsa_record += reclen;
1056                         }
1057
1058                 ex->tlsa_mask = 0;
1059                 ex->tlsa_witness = -1;
1060                 X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
1061                 }
1062         else
1063 #endif
1064         if (s->verify_callback)
1065                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
1066
1067         if (s->ctx->app_verify_callback != NULL)
1068 #if 1 /* new with OpenSSL 0.9.7 */
1069                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
1070 #else
1071                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
1072 #endif
1073         else
1074                 {
1075 #ifndef OPENSSL_NO_X509_VERIFY
1076                 i=X509_verify_cert(&ctx);
1077 #else
1078                 i=0;
1079                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
1080                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
1081 #endif
1082                 }
1083
1084         s->verify_result=ctx.error;
1085         X509_STORE_CTX_cleanup(&ctx);
1086
1087         return(i);
1088         }
1089
1090 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
1091         {
1092         if (*ca_list != NULL)
1093                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
1094
1095         *ca_list=name_list;
1096         }
1097
1098 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
1099         {
1100         int i;
1101         STACK_OF(X509_NAME) *ret;
1102         X509_NAME *name;
1103
1104         ret=sk_X509_NAME_new_null();
1105         for (i=0; i<sk_X509_NAME_num(sk); i++)
1106                 {
1107                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
1108                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
1109                         {
1110                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
1111                         return(NULL);
1112                         }
1113                 }
1114         return(ret);
1115         }
1116
1117 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
1118         {
1119         set_client_CA_list(&(s->client_CA),name_list);
1120         }
1121
1122 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
1123         {
1124         set_client_CA_list(&(ctx->client_CA),name_list);
1125         }
1126
1127 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
1128         {
1129         return(ctx->client_CA);
1130         }
1131
1132 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
1133         {
1134         if (s->type == SSL_ST_CONNECT)
1135                 { /* we are in the client */
1136                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
1137                         (s->s3 != NULL))
1138                         return(s->s3->tmp.ca_names);
1139                 else
1140                         return(NULL);
1141                 }
1142         else
1143                 {
1144                 if (s->client_CA != NULL)
1145                         return(s->client_CA);
1146                 else
1147                         return(s->ctx->client_CA);
1148                 }
1149         }
1150
1151 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
1152         {
1153         X509_NAME *name;
1154
1155         if (x == NULL) return(0);
1156         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
1157                 return(0);
1158
1159         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
1160                 return(0);
1161
1162         if (!sk_X509_NAME_push(*sk,name))
1163                 {
1164                 X509_NAME_free(name);
1165                 return(0);
1166                 }
1167         return(1);
1168         }
1169
1170 int SSL_add_client_CA(SSL *ssl,X509 *x)
1171         {
1172         return(add_client_CA(&(ssl->client_CA),x));
1173         }
1174
1175 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
1176         {
1177         return(add_client_CA(&(ctx->client_CA),x));
1178         }
1179
1180 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1181         {
1182         return(X509_NAME_cmp(*a,*b));
1183         }
1184
1185 #ifndef OPENSSL_NO_STDIO
1186 /*!
1187  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
1188  * it doesn't really have anything to do with clients (except that a common use
1189  * for a stack of CAs is to send it to the client). Actually, it doesn't have
1190  * much to do with CAs, either, since it will load any old cert.
1191  * \param file the file containing one or more certs.
1192  * \return a ::STACK containing the certs.
1193  */
1194 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
1195         {
1196         BIO *in;
1197         X509 *x=NULL;
1198         X509_NAME *xn=NULL;
1199         STACK_OF(X509_NAME) *ret = NULL,*sk;
1200
1201         sk=sk_X509_NAME_new(xname_cmp);
1202
1203         in=BIO_new(BIO_s_file_internal());
1204
1205         if ((sk == NULL) || (in == NULL))
1206                 {
1207                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1208                 goto err;
1209                 }
1210
1211         if (!BIO_read_filename(in,file))
1212                 goto err;
1213
1214         for (;;)
1215                 {
1216                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1217                         break;
1218                 if (ret == NULL)
1219                         {
1220                         ret = sk_X509_NAME_new_null();
1221                         if (ret == NULL)
1222                                 {
1223                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1224                                 goto err;
1225                                 }
1226                         }
1227                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1228                 /* check for duplicates */
1229                 xn=X509_NAME_dup(xn);
1230                 if (xn == NULL) goto err;
1231                 if (sk_X509_NAME_find(sk,xn) >= 0)
1232                         X509_NAME_free(xn);
1233                 else
1234                         {
1235                         sk_X509_NAME_push(sk,xn);
1236                         sk_X509_NAME_push(ret,xn);
1237                         }
1238                 }
1239
1240         if (0)
1241                 {
1242 err:
1243                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1244                 ret=NULL;
1245                 }
1246         if (sk != NULL) sk_X509_NAME_free(sk);
1247         if (in != NULL) BIO_free(in);
1248         if (x != NULL) X509_free(x);
1249         if (ret != NULL)
1250                 ERR_clear_error();
1251         return(ret);
1252         }
1253 #endif
1254
1255 /*!
1256  * Add a file of certs to a stack.
1257  * \param stack the stack to add to.
1258  * \param file the file to add from. All certs in this file that are not
1259  * already in the stack will be added.
1260  * \return 1 for success, 0 for failure. Note that in the case of failure some
1261  * certs may have been added to \c stack.
1262  */
1263
1264 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1265                                         const char *file)
1266         {
1267         BIO *in;
1268         X509 *x=NULL;
1269         X509_NAME *xn=NULL;
1270         int ret=1;
1271         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1272
1273         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1274
1275         in=BIO_new(BIO_s_file_internal());
1276
1277         if (in == NULL)
1278                 {
1279                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1280                 goto err;
1281                 }
1282
1283         if (!BIO_read_filename(in,file))
1284                 goto err;
1285
1286         for (;;)
1287                 {
1288                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1289                         break;
1290                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1291                 xn=X509_NAME_dup(xn);
1292                 if (xn == NULL) goto err;
1293                 if (sk_X509_NAME_find(stack,xn) >= 0)
1294                         X509_NAME_free(xn);
1295                 else
1296                         sk_X509_NAME_push(stack,xn);
1297                 }
1298
1299         ERR_clear_error();
1300
1301         if (0)
1302                 {
1303 err:
1304                 ret=0;
1305                 }
1306         if(in != NULL)
1307                 BIO_free(in);
1308         if(x != NULL)
1309                 X509_free(x);
1310
1311         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1312
1313         return ret;
1314         }
1315
1316 /*!
1317  * Add a directory of certs to a stack.
1318  * \param stack the stack to append to.
1319  * \param dir the directory to append from. All files in this directory will be
1320  * examined as potential certs. Any that are acceptable to
1321  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1322  * included.
1323  * \return 1 for success, 0 for failure. Note that in the case of failure some
1324  * certs may have been added to \c stack.
1325  */
1326
1327 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1328                                        const char *dir)
1329         {
1330         OPENSSL_DIR_CTX *d = NULL;
1331         const char *filename;
1332         int ret = 0;
1333
1334         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1335
1336         /* Note that a side effect is that the CAs will be sorted by name */
1337
1338         while((filename = OPENSSL_DIR_read(&d, dir)))
1339                 {
1340                 char buf[1024];
1341                 int r;
1342
1343                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1344                         {
1345                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1346                         goto err;
1347                         }
1348
1349 #ifdef OPENSSL_SYS_VMS
1350                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1351 #else
1352                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1353 #endif
1354                 if (r <= 0 || r >= (int)sizeof(buf))
1355                         goto err;
1356                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1357                         goto err;
1358                 }
1359
1360         if (errno)
1361                 {
1362                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1363                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1364                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1365                 goto err;
1366                 }
1367
1368         ret = 1;
1369
1370 err:
1371         if (d) OPENSSL_DIR_end(&d);
1372         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1373         return ret;
1374         }
1375
1376 /* Add a certificate to a BUF_MEM structure */
1377
1378 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1379         {
1380         int n;
1381         unsigned char *p;
1382
1383         n=i2d_X509(x,NULL);
1384         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1385                 {
1386                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1387                 return 0;
1388                 }
1389         p=(unsigned char *)&(buf->data[*l]);
1390         l2n3(n,p);
1391         i2d_X509(x,&p);
1392         *l+=n+3;
1393
1394         return 1;
1395         }
1396
1397 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1398 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1399         {
1400         BUF_MEM *buf = s->init_buf;
1401         int no_chain;
1402         int i;
1403
1404         X509 *x;
1405         STACK_OF(X509) *extra_certs;
1406         X509_STORE *chain_store;
1407
1408         if (cpk)
1409                 x = cpk->x509;
1410         else
1411                 x = NULL;
1412
1413         if (s->cert->chain_store)
1414                 chain_store = s->cert->chain_store;
1415         else
1416                 chain_store = s->ctx->cert_store;
1417
1418         /* If we have a certificate specific chain use it, else use
1419          * parent ctx.
1420          */
1421         if (cpk && cpk->chain)
1422                 extra_certs = cpk->chain;
1423         else
1424                 extra_certs = s->ctx->extra_certs;
1425
1426         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1427                 no_chain = 1;
1428         else
1429                 no_chain = 0;
1430
1431         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1432         if (!BUF_MEM_grow_clean(buf,10))
1433                 {
1434                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1435                 return 0;
1436                 }
1437         if (x != NULL)
1438                 {
1439                 if (no_chain)
1440                         {
1441                         if (!ssl_add_cert_to_buf(buf, l, x))
1442                                 return 0;
1443                         }
1444                 else
1445                         {
1446                         X509_STORE_CTX xs_ctx;
1447
1448                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1449                                 {
1450                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1451                                 return(0);
1452                                 }
1453                         X509_verify_cert(&xs_ctx);
1454                         /* Don't leave errors in the queue */
1455                         ERR_clear_error();
1456                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1457                                 {
1458                                 x = sk_X509_value(xs_ctx.chain, i);
1459
1460                                 if (!ssl_add_cert_to_buf(buf, l, x))
1461                                         {
1462                                         X509_STORE_CTX_cleanup(&xs_ctx);
1463                                         return 0;
1464                                         }
1465                                 }
1466                         X509_STORE_CTX_cleanup(&xs_ctx);
1467                         }
1468                 }
1469         for (i=0; i<sk_X509_num(extra_certs); i++)
1470                 {
1471                 x=sk_X509_value(extra_certs,i);
1472                 if (!ssl_add_cert_to_buf(buf, l, x))
1473                         return 0;
1474                 }
1475
1476         return 1;
1477         }
1478
1479 /* Build a certificate chain for current certificate */
1480 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1481         {
1482         CERT_PKEY *cpk = c->key;
1483         X509_STORE_CTX xs_ctx;
1484         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1485         X509 *x;
1486         int i, rv = 0;
1487         unsigned long error;
1488
1489         if (!cpk->x509)
1490                 {
1491                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1492                 goto err;
1493                 }
1494         /* Rearranging and check the chain: add everything to a store */
1495         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1496                 {
1497                 chain_store = X509_STORE_new();
1498                 if (!chain_store)
1499                         goto err;
1500                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1501                         {
1502                         x = sk_X509_value(cpk->chain, i);
1503                         if (!X509_STORE_add_cert(chain_store, x))
1504                                 {
1505                                 error = ERR_peek_last_error();
1506                                 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1507                                     ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1508                                         goto err;
1509                                 ERR_clear_error();
1510                                 }
1511                         }
1512                 /* Add EE cert too: it might be self signed */
1513                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1514                         {
1515                         error = ERR_peek_last_error();
1516                         if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1517                             ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1518                                 goto err;
1519                         ERR_clear_error();
1520                         }
1521                 }
1522         else
1523                 {
1524                 if (c->chain_store)
1525                         chain_store = c->chain_store;
1526
1527                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1528                         untrusted = cpk->chain;
1529                 }
1530
1531         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1532                 {
1533                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1534                 goto err;
1535                 }
1536         /* Set suite B flags if needed */
1537         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1538
1539         i = X509_verify_cert(&xs_ctx);
1540         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1541                 {
1542                 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1543                         ERR_clear_error();
1544                 i = 1;
1545                 rv = 2;
1546                 }
1547         if (i > 0)
1548                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1549         if (i <= 0)
1550                 {
1551                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1552                 i = X509_STORE_CTX_get_error(&xs_ctx);
1553                 ERR_add_error_data(2, "Verify error:",
1554                                         X509_verify_cert_error_string(i));
1555
1556                 X509_STORE_CTX_cleanup(&xs_ctx);
1557                 goto err;
1558                 }
1559         X509_STORE_CTX_cleanup(&xs_ctx);
1560         if (cpk->chain)
1561                 sk_X509_pop_free(cpk->chain, X509_free);
1562         /* Remove EE certificate from chain */
1563         x = sk_X509_shift(chain);
1564         X509_free(x);
1565         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1566                 {
1567                 if (sk_X509_num(chain) > 0)
1568                         {
1569                         /* See if last cert is self signed */
1570                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1571                         X509_check_purpose(x, -1, 0);
1572                         if (x->ex_flags & EXFLAG_SS)
1573                                 {
1574                                 x = sk_X509_pop(chain);
1575                                 X509_free(x);
1576                                 }
1577                         }
1578                 }
1579         cpk->chain = chain;
1580         if (rv == 0)
1581                 rv = 1;
1582         err:
1583         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1584                 X509_STORE_free(chain_store);
1585
1586         return rv;
1587         }
1588
1589 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1590         {
1591         X509_STORE **pstore;
1592         if (chain)
1593                 pstore = &c->chain_store;
1594         else
1595                 pstore = &c->verify_store;
1596         if (*pstore)
1597                 X509_STORE_free(*pstore);
1598         *pstore = store;
1599         if (ref && store)
1600                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1601         return 1;
1602         }
1603