ssl/ssl_cert.c

   1 /*! \file ssl/ssl_cert.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 #include <stdio.h>
 118
 119 #include "e_os.h"
 120 #ifndef NO_SYS_TYPES_H
 121 # include <sys/types.h>
 122 #endif
 123
 124 #include "o_dir.h"
 125 #include <openssl/objects.h>
 126 #include <openssl/bio.h>
 127 #include <openssl/pem.h>
 128 #include <openssl/x509v3.h>
 129 #ifndef OPENSSL_NO_DH
 130 #include <openssl/dh.h>
 131 #endif
 132 #include <openssl/bn.h>
 133 #include "ssl_locl.h"
 134
 135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
 136         {
 137         static volatile int ssl_x509_store_ctx_idx= -1;
 138         int got_write_lock = 0;
 139
 140         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 141
 142         if (ssl_x509_store_ctx_idx < 0)
 143                 {
 144                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 145                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 146                 got_write_lock = 1;
 147
 148                 if (ssl_x509_store_ctx_idx < 0)
 149                         {
 150                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 151                                 0,"SSL for verify callback",NULL,NULL,NULL);
 152                         }
 153                 }
 154
 155         if (got_write_lock)
 156                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 157         else
 158                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 159
 160         return ssl_x509_store_ctx_idx;
 161         }
 162
 163 void ssl_cert_set_default_md(CERT *cert)
 164         {
 165         /* Set digest values to defaults */
 166 #ifndef OPENSSL_NO_DSA
 167         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
 168 #endif
 169 #ifndef OPENSSL_NO_RSA
 170         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
 171         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
 172 #endif
 173 #ifndef OPENSSL_NO_ECDSA
 174         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
 175 #endif
 176         }
 177
 178 CERT *ssl_cert_new(void)
 179         {
 180         CERT *ret;
 181
 182         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
 183         if (ret == NULL)
 184                 {
 185                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
 186                 return(NULL);
 187                 }
 188         memset(ret,0,sizeof(CERT));
 189
 190         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
 191         ret->references=1;
 192         ssl_cert_set_default_md(ret);
 193         return(ret);
 194         }
 195
 196 CERT *ssl_cert_dup(CERT *cert)
 197         {
 198         CERT *ret;
 199         int i;
 200
 201         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
 202         if (ret == NULL)
 203                 {
 204                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 205                 return(NULL);
 206                 }
 207
 208         memset(ret, 0, sizeof(CERT));
 209
 210         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
 211         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
 212          * if you find that more readable */
 213
 214         ret->valid = cert->valid;
 215         ret->mask_k = cert->mask_k;
 216         ret->mask_a = cert->mask_a;
 217         ret->export_mask_k = cert->export_mask_k;
 218         ret->export_mask_a = cert->export_mask_a;
 219
 220 #ifndef OPENSSL_NO_RSA
 221         if (cert->rsa_tmp != NULL)
 222                 {
 223                 RSA_up_ref(cert->rsa_tmp);
 224                 ret->rsa_tmp = cert->rsa_tmp;
 225                 }
 226         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 227 #endif
 228
 229 #ifndef OPENSSL_NO_DH
 230         if (cert->dh_tmp != NULL)
 231                 {
 232                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
 233                 if (ret->dh_tmp == NULL)
 234                         {
 235                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
 236                         goto err;
 237                         }
 238                 if (cert->dh_tmp->priv_key)
 239                         {
 240                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
 241                         if (!b)
 242                                 {
 243                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 244                                 goto err;
 245                                 }
 246                         ret->dh_tmp->priv_key = b;
 247                         }
 248                 if (cert->dh_tmp->pub_key)
 249                         {
 250                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
 251                         if (!b)
 252                                 {
 253                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 254                                 goto err;
 255                                 }
 256                         ret->dh_tmp->pub_key = b;
 257                         }
 258                 }
 259         ret->dh_tmp_cb = cert->dh_tmp_cb;
 260 #endif
 261
 262 #ifndef OPENSSL_NO_ECDH
 263         if (cert->ecdh_tmp)
 264                 {
 265                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 266                 if (ret->ecdh_tmp == NULL)
 267                         {
 268                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 269                         goto err;
 270                         }
 271                 }
 272         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 273         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 274 #endif
 275
 276         for (i = 0; i < SSL_PKEY_NUM; i++)
 277                 {
 278                 CERT_PKEY *cpk = cert->pkeys + i;
 279                 CERT_PKEY *rpk = ret->pkeys + i;
 280                 if (cpk->x509 != NULL)
 281                         {
 282                         rpk->x509 = cpk->x509;
 283                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 284                         }
 285
 286                 if (cpk->privatekey != NULL)
 287                         {
 288                         rpk->privatekey = cpk->privatekey;
 289                         CRYPTO_add(&cpk->privatekey->references, 1,
 290                                 CRYPTO_LOCK_EVP_PKEY);
 291
 292                         switch(i)
 293                                 {
 294                                 /* If there was anything special to do for
 295                                  * certain types of keys, we'd do it here.
 296                                  * (Nothing at the moment, I think.) */
 297
 298                         case SSL_PKEY_RSA_ENC:
 299                         case SSL_PKEY_RSA_SIGN:
 300                                 /* We have an RSA key. */
 301                                 break;
 302
 303                         case SSL_PKEY_DSA_SIGN:
 304                                 /* We have a DSA key. */
 305                                 break;
 306
 307                         case SSL_PKEY_DH_RSA:
 308                         case SSL_PKEY_DH_DSA:
 309                                 /* We have a DH key. */
 310                                 break;
 311
 312                         case SSL_PKEY_ECC:
 313                                 /* We have an ECC key */
 314                                 break;
 315
 316                         default:
 317                                 /* Can't happen. */
 318                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 319                                 }
 320                         }
 321
 322                 if (cpk->chain)
 323                         {
 324                         int j;
 325                         rpk->chain = sk_X509_dup(cpk->chain);
 326                         if (!rpk->chain)
 327                                 {
 328                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 329                                 goto err;
 330                                 }
 331                         for (j = 0; j < sk_X509_num(rpk->chain); j++)
 332                                 {
 333                                 X509 *x = sk_X509_value(rpk->chain, j);
 334                                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 335                                 }
 336                         }
 337                 rpk->valid_flags = 0;
 338                 if (cert->pkeys[i].authz != NULL)
 339                         {
 340                         /* Just copy everything. */
 341                         ret->pkeys[i].authz_length =
 342                                 cert->pkeys[i].authz_length;
 343                         ret->pkeys[i].authz =
 344                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
 345                         if (ret->pkeys[i].authz == NULL)
 346                                 {
 347                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 348                                 return(NULL);
 349                                 }
 350                         memcpy(ret->pkeys[i].authz,
 351                                cert->pkeys[i].authz,
 352                                cert->pkeys[i].authz_length);
 353                         }
 354                 }
 355
 356         ret->references=1;
 357         /* Set digests to defaults. NB: we don't copy existing values as they
 358          * will be set during handshake.
 359          */
 360         ssl_cert_set_default_md(ret);
 361         /* Peer sigalgs set to NULL as we get these from handshake too */
 362         ret->peer_sigalgs = NULL;
 363         ret->peer_sigalgslen = 0;
 364         /* Configured sigalgs however we copy across */
 365
 366         if (cert->conf_sigalgs)
 367                 {
 368                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 369                 if (!ret->conf_sigalgs)
 370                         goto err;
 371                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 372                                                 cert->conf_sigalgslen);
 373                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 374                 }
 375         else
 376                 ret->conf_sigalgs = NULL;
 377
 378         if (cert->client_sigalgs)
 379                 {
 380                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 381                 if (!ret->client_sigalgs)
 382                         goto err;
 383                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 384                                                 cert->client_sigalgslen);
 385                 ret->client_sigalgslen = cert->client_sigalgslen;
 386                 }
 387         else
 388                 ret->client_sigalgs = NULL;
 389         /* Shared sigalgs also NULL */
 390         ret->shared_sigalgs = NULL;
 391         /* Copy any custom client certificate types */
 392         if (cert->ctypes)
 393                 {
 394                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 395                 if (!ret->ctypes)
 396                         goto err;
 397                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 398                 ret->ctype_num = cert->ctype_num;
 399                 }
 400
 401         ret->cert_flags = cert->cert_flags;
 402
 403         ret->cert_cb = cert->cert_cb;
 404         ret->cert_cb_arg = cert->cert_cb_arg;
 405
 406         if (cert->verify_store)
 407                 {
 408                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 409                 ret->verify_store = cert->verify_store;
 410                 }
 411
 412         if (cert->chain_store)
 413                 {
 414                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 415                 ret->chain_store = cert->chain_store;
 416                 }
 417
 418         return(ret);
 419
 420 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 421 err:
 422 #endif
 423 #ifndef OPENSSL_NO_RSA
 424         if (ret->rsa_tmp != NULL)
 425                 RSA_free(ret->rsa_tmp);
 426 #endif
 427 #ifndef OPENSSL_NO_DH
 428         if (ret->dh_tmp != NULL)
 429                 DH_free(ret->dh_tmp);
 430 #endif
 431 #ifndef OPENSSL_NO_ECDH
 432         if (ret->ecdh_tmp != NULL)
 433                 EC_KEY_free(ret->ecdh_tmp);
 434 #endif
 435
 436         ssl_cert_clear_certs(ret);
 437
 438         return NULL;
 439         }
 440
 441 /* Free up and clear all certificates and chains */
 442
 443 void ssl_cert_clear_certs(CERT *c)
 444         {
 445         int i;
 446         if (c == NULL)
 447                 return;
 448         for (i = 0; i<SSL_PKEY_NUM; i++)
 449                 {
 450                 CERT_PKEY *cpk = c->pkeys + i;
 451                 if (cpk->x509)
 452                         {
 453                         X509_free(cpk->x509);
 454                         cpk->x509 = NULL;
 455                         }
 456                 if (cpk->privatekey)
 457                         {
 458                         EVP_PKEY_free(cpk->privatekey);
 459                         cpk->privatekey = NULL;
 460                         }
 461                 if (cpk->chain)
 462                         {
 463                         sk_X509_pop_free(cpk->chain, X509_free);
 464                         cpk->chain = NULL;
 465                         }
 466 #ifndef OPENSSL_NO_TLSEXT
 467                 if (cpk->authz != NULL)
 468                         OPENSSL_free(cpk->authz);
 469 #endif
 470                 /* Clear all flags apart from explicit sign */
 471                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 472                 }
 473         }
 474
 475 void ssl_cert_free(CERT *c)
 476         {
 477         int i;
 478
 479         if(c == NULL)
 480             return;
 481
 482         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 483 #ifdef REF_PRINT
 484         REF_PRINT("CERT",c);
 485 #endif
 486         if (i > 0) return;
 487 #ifdef REF_CHECK
 488         if (i < 0)
 489                 {
 490                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 491                 abort(); /* ok */
 492                 }
 493 #endif
 494
 495 #ifndef OPENSSL_NO_RSA
 496         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 497 #endif
 498 #ifndef OPENSSL_NO_DH
 499         if (c->dh_tmp) DH_free(c->dh_tmp);
 500 #endif
 501 #ifndef OPENSSL_NO_ECDH
 502         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 503 #endif
 504
 505         ssl_cert_clear_certs(c);
 506         if (c->peer_sigalgs)
 507                 OPENSSL_free(c->peer_sigalgs);
 508         if (c->conf_sigalgs)
 509                 OPENSSL_free(c->conf_sigalgs);
 510         if (c->client_sigalgs)
 511                 OPENSSL_free(c->client_sigalgs);
 512         if (c->shared_sigalgs)
 513                 OPENSSL_free(c->shared_sigalgs);
 514         if (c->ctypes)
 515                 OPENSSL_free(c->ctypes);
 516         if (c->verify_store)
 517                 X509_STORE_free(c->verify_store);
 518         if (c->chain_store)
 519                 X509_STORE_free(c->chain_store);
 520         OPENSSL_free(c);
 521         }
 522
 523 int ssl_cert_inst(CERT **o)
 524         {
 525         /* Create a CERT if there isn't already one
 526          * (which cannot really happen, as it is initially created in
 527          * SSL_CTX_new; but the earlier code usually allows for that one
 528          * being non-existant, so we follow that behaviour, as it might
 529          * turn out that there actually is a reason for it -- but I'm
 530          * not sure that *all* of the existing code could cope with
 531          * s->cert being NULL, otherwise we could do without the
 532          * initialization in SSL_CTX_new).
 533          */
 534
 535         if (o == NULL)
 536                 {
 537                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 538                 return(0);
 539                 }
 540         if (*o == NULL)
 541                 {
 542                 if ((*o = ssl_cert_new()) == NULL)
 543                         {
 544                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 545                         return(0);
 546                         }
 547                 }
 548         return(1);
 549         }
 550
 551 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 552         {
 553         CERT_PKEY *cpk = c->key;
 554         if (!cpk)
 555                 return 0;
 556         if (cpk->chain)
 557                 sk_X509_pop_free(cpk->chain, X509_free);
 558         cpk->chain = chain;
 559         return 1;
 560         }
 561
 562 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 563         {
 564         STACK_OF(X509) *dchain;
 565         X509 *x;
 566         int i;
 567         if (!chain)
 568                 return ssl_cert_set0_chain(c, NULL);
 569         dchain = sk_X509_dup(chain);
 570         if (!dchain)
 571                 return 0;
 572         for (i = 0; i < sk_X509_num(dchain); i++)
 573                 {
 574                 x = sk_X509_value(dchain, i);
 575                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 576                 }
 577         if (!ssl_cert_set0_chain(c, dchain))
 578                 {
 579                 sk_X509_pop_free(dchain, X509_free);
 580                 return 0;
 581                 }
 582         return 1;
 583         }
 584
 585 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 586         {
 587         CERT_PKEY *cpk = c->key;
 588         if (!cpk)
 589                 return 0;
 590         if (!cpk->chain)
 591                 cpk->chain = sk_X509_new_null();
 592         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 593                 return 0;
 594         return 1;
 595         }
 596
 597 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 598         {
 599         if (!ssl_cert_add0_chain_cert(c, x))
 600                 return 0;
 601         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 602         return 1;
 603         }
 604
 605 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 606         {
 607         c->cert_cb = cb;
 608         c->cert_cb_arg = arg;
 609         }
 610
 611 SESS_CERT *ssl_sess_cert_new(void)
 612         {
 613         SESS_CERT *ret;
 614
 615         ret = OPENSSL_malloc(sizeof *ret);
 616         if (ret == NULL)
 617                 {
 618                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 619                 return NULL;
 620                 }
 621
 622         memset(ret, 0 ,sizeof *ret);
 623         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 624         ret->references = 1;
 625
 626         return ret;
 627         }
 628
 629 void ssl_sess_cert_free(SESS_CERT *sc)
 630         {
 631         int i;
 632
 633         if (sc == NULL)
 634                 return;
 635
 636         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 637 #ifdef REF_PRINT
 638         REF_PRINT("SESS_CERT", sc);
 639 #endif
 640         if (i > 0)
 641                 return;
 642 #ifdef REF_CHECK
 643         if (i < 0)
 644                 {
 645                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 646                 abort(); /* ok */
 647                 }
 648 #endif
 649
 650         /* i == 0 */
 651         if (sc->cert_chain != NULL)
 652                 sk_X509_pop_free(sc->cert_chain, X509_free);
 653         for (i = 0; i < SSL_PKEY_NUM; i++)
 654                 {
 655                 if (sc->peer_pkeys[i].x509 != NULL)
 656                         X509_free(sc->peer_pkeys[i].x509);
 657 #if 0 /* We don't have the peer's private key.  These lines are just
 658            * here as a reminder that we're still using a not-quite-appropriate
 659            * data structure. */
 660                 if (sc->peer_pkeys[i].privatekey != NULL)
 661                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 662 #endif
 663                 }
 664
 665 #ifndef OPENSSL_NO_RSA
 666         if (sc->peer_rsa_tmp != NULL)
 667                 RSA_free(sc->peer_rsa_tmp);
 668 #endif
 669 #ifndef OPENSSL_NO_DH
 670         if (sc->peer_dh_tmp != NULL)
 671                 DH_free(sc->peer_dh_tmp);
 672 #endif
 673 #ifndef OPENSSL_NO_ECDH
 674         if (sc->peer_ecdh_tmp != NULL)
 675                 EC_KEY_free(sc->peer_ecdh_tmp);
 676 #endif
 677
 678         OPENSSL_free(sc);
 679         }
 680
 681 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 682         {
 683         sc->peer_cert_type = type;
 684         return(1);
 685         }
 686
 687 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 688         {
 689         X509 *x;
 690         int i;
 691         X509_STORE *verify_store;
 692         X509_STORE_CTX ctx;
 693
 694         if (s->cert->verify_store)
 695                 verify_store = s->cert->verify_store;
 696         else
 697                 verify_store = s->ctx->cert_store;
 698
 699         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 700                 return(0);
 701
 702         x=sk_X509_value(sk,0);
 703         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 704                 {
 705                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 706                 return(0);
 707                 }
 708 #if 0
 709         if (SSL_get_verify_depth(s) >= 0)
 710                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 711 #endif
 712         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 713
 714         /* We need to inherit the verify parameters. These can be determined by
 715          * the context: if its a server it will verify SSL client certificates
 716          * or vice versa.
 717          */
 718
 719         X509_STORE_CTX_set_default(&ctx,
 720                                 s->server ? "ssl_client" : "ssl_server");
 721         /* Anything non-default in "param" should overwrite anything in the
 722          * ctx.
 723          */
 724         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 725
 726         if (s->verify_callback)
 727                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 728
 729         if (s->ctx->app_verify_callback != NULL)
 730 #if 1 /* new with OpenSSL 0.9.7 */
 731                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 732 #else
 733                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 734 #endif
 735         else
 736                 {
 737 #ifndef OPENSSL_NO_X509_VERIFY
 738                 i=X509_verify_cert(&ctx);
 739 #else
 740                 i=0;
 741                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 742                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 743 #endif
 744                 }
 745
 746         s->verify_result=ctx.error;
 747         X509_STORE_CTX_cleanup(&ctx);
 748
 749         return(i);
 750         }
 751
 752 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 753         {
 754         if (*ca_list != NULL)
 755                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 756
 757         *ca_list=name_list;
 758         }
 759
 760 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 761         {
 762         int i;
 763         STACK_OF(X509_NAME) *ret;
 764         X509_NAME *name;
 765
 766         ret=sk_X509_NAME_new_null();
 767         for (i=0; i<sk_X509_NAME_num(sk); i++)
 768                 {
 769                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 770                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 771                         {
 772                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 773                         return(NULL);
 774                         }
 775                 }
 776         return(ret);
 777         }
 778
 779 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 780         {
 781         set_client_CA_list(&(s->client_CA),name_list);
 782         }
 783
 784 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 785         {
 786         set_client_CA_list(&(ctx->client_CA),name_list);
 787         }
 788
 789 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 790         {
 791         return(ctx->client_CA);
 792         }
 793
 794 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 795         {
 796         if (s->type == SSL_ST_CONNECT)
 797                 { /* we are in the client */
 798                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 799                         (s->s3 != NULL))
 800                         return(s->s3->tmp.ca_names);
 801                 else
 802                         return(NULL);
 803                 }
 804         else
 805                 {
 806                 if (s->client_CA != NULL)
 807                         return(s->client_CA);
 808                 else
 809                         return(s->ctx->client_CA);
 810                 }
 811         }
 812
 813 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 814         {
 815         X509_NAME *name;
 816
 817         if (x == NULL) return(0);
 818         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 819                 return(0);
 820
 821         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 822                 return(0);
 823
 824         if (!sk_X509_NAME_push(*sk,name))
 825                 {
 826                 X509_NAME_free(name);
 827                 return(0);
 828                 }
 829         return(1);
 830         }
 831
 832 int SSL_add_client_CA(SSL *ssl,X509 *x)
 833         {
 834         return(add_client_CA(&(ssl->client_CA),x));
 835         }
 836
 837 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 838         {
 839         return(add_client_CA(&(ctx->client_CA),x));
 840         }
 841
 842 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 843         {
 844         return(X509_NAME_cmp(*a,*b));
 845         }
 846
 847 #ifndef OPENSSL_NO_STDIO
 848 /*!
 849  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 850  * it doesn't really have anything to do with clients (except that a common use
 851  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 852  * much to do with CAs, either, since it will load any old cert.
 853  * \param file the file containing one or more certs.
 854  * \return a ::STACK containing the certs.
 855  */
 856 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 857         {
 858         BIO *in;
 859         X509 *x=NULL;
 860         X509_NAME *xn=NULL;
 861         STACK_OF(X509_NAME) *ret = NULL,*sk;
 862
 863         sk=sk_X509_NAME_new(xname_cmp);
 864
 865         in=BIO_new(BIO_s_file_internal());
 866
 867         if ((sk == NULL) || (in == NULL))
 868                 {
 869                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 870                 goto err;
 871                 }
 872
 873         if (!BIO_read_filename(in,file))
 874                 goto err;
 875
 876         for (;;)
 877                 {
 878                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 879                         break;
 880                 if (ret == NULL)
 881                         {
 882                         ret = sk_X509_NAME_new_null();
 883                         if (ret == NULL)
 884                                 {
 885                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 886                                 goto err;
 887                                 }
 888                         }
 889                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 890                 /* check for duplicates */
 891                 xn=X509_NAME_dup(xn);
 892                 if (xn == NULL) goto err;
 893                 if (sk_X509_NAME_find(sk,xn) >= 0)
 894                         X509_NAME_free(xn);
 895                 else
 896                         {
 897                         sk_X509_NAME_push(sk,xn);
 898                         sk_X509_NAME_push(ret,xn);
 899                         }
 900                 }
 901
 902         if (0)
 903                 {
 904 err:
 905                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 906                 ret=NULL;
 907                 }
 908         if (sk != NULL) sk_X509_NAME_free(sk);
 909         if (in != NULL) BIO_free(in);
 910         if (x != NULL) X509_free(x);
 911         if (ret != NULL)
 912                 ERR_clear_error();
 913         return(ret);
 914         }
 915 #endif
 916
 917 /*!
 918  * Add a file of certs to a stack.
 919  * \param stack the stack to add to.
 920  * \param file the file to add from. All certs in this file that are not
 921  * already in the stack will be added.
 922  * \return 1 for success, 0 for failure. Note that in the case of failure some
 923  * certs may have been added to \c stack.
 924  */
 925
 926 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 927                                         const char *file)
 928         {
 929         BIO *in;
 930         X509 *x=NULL;
 931         X509_NAME *xn=NULL;
 932         int ret=1;
 933         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 934
 935         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 936
 937         in=BIO_new(BIO_s_file_internal());
 938
 939         if (in == NULL)
 940                 {
 941                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
 942                 goto err;
 943                 }
 944
 945         if (!BIO_read_filename(in,file))
 946                 goto err;
 947
 948         for (;;)
 949                 {
 950                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 951                         break;
 952                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 953                 xn=X509_NAME_dup(xn);
 954                 if (xn == NULL) goto err;
 955                 if (sk_X509_NAME_find(stack,xn) >= 0)
 956                         X509_NAME_free(xn);
 957                 else
 958                         sk_X509_NAME_push(stack,xn);
 959                 }
 960
 961         ERR_clear_error();
 962
 963         if (0)
 964                 {
 965 err:
 966                 ret=0;
 967                 }
 968         if(in != NULL)
 969                 BIO_free(in);
 970         if(x != NULL)
 971                 X509_free(x);
 972
 973         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 974
 975         return ret;
 976         }
 977
 978 /*!
 979  * Add a directory of certs to a stack.
 980  * \param stack the stack to append to.
 981  * \param dir the directory to append from. All files in this directory will be
 982  * examined as potential certs. Any that are acceptable to
 983  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 984  * included.
 985  * \return 1 for success, 0 for failure. Note that in the case of failure some
 986  * certs may have been added to \c stack.
 987  */
 988
 989 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 990                                        const char *dir)
 991         {
 992         OPENSSL_DIR_CTX *d = NULL;
 993         const char *filename;
 994         int ret = 0;
 995
 996         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
 997
 998         /* Note that a side effect is that the CAs will be sorted by name */
 999
1000         while((filename = OPENSSL_DIR_read(&d, dir)))
1001                 {
1002                 char buf[1024];
1003                 int r;
1004
1005                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1006                         {
1007                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1008                         goto err;
1009                         }
1010
1011 #ifdef OPENSSL_SYS_VMS
1012                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1013 #else
1014                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1015 #endif
1016                 if (r <= 0 || r >= (int)sizeof(buf))
1017                         goto err;
1018                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1019                         goto err;
1020                 }
1021
1022         if (errno)
1023                 {
1024                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1025                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1026                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1027                 goto err;
1028                 }
1029
1030         ret = 1;
1031
1032 err:
1033         if (d) OPENSSL_DIR_end(&d);
1034         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1035         return ret;
1036         }
1037
1038 /* Add a certificate to a BUF_MEM structure */
1039
1040 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1041         {
1042         int n;
1043         unsigned char *p;
1044
1045         n=i2d_X509(x,NULL);
1046         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1047                 {
1048                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1049                 return 0;
1050                 }
1051         p=(unsigned char *)&(buf->data[*l]);
1052         l2n3(n,p);
1053         i2d_X509(x,&p);
1054         *l+=n+3;
1055
1056         return 1;
1057         }
1058
1059 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1060 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1061         {
1062         BUF_MEM *buf = s->init_buf;
1063         int no_chain;
1064         int i;
1065
1066         X509 *x;
1067         STACK_OF(X509) *extra_certs;
1068         X509_STORE *chain_store;
1069
1070         if (cpk)
1071                 x = cpk->x509;
1072         else
1073                 x = NULL;
1074
1075         if (s->cert->chain_store)
1076                 chain_store = s->cert->chain_store;
1077         else
1078                 chain_store = s->ctx->cert_store;
1079
1080         /* If we have a certificate specific chain use it, else use
1081          * parent ctx.
1082          */
1083         if (cpk && cpk->chain)
1084                 extra_certs = cpk->chain;
1085         else
1086                 extra_certs = s->ctx->extra_certs;
1087
1088         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1089                 no_chain = 1;
1090         else
1091                 no_chain = 0;
1092
1093         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1094         if (!BUF_MEM_grow_clean(buf,10))
1095                 {
1096                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1097                 return 0;
1098                 }
1099         if (x != NULL)
1100                 {
1101                 if (no_chain)
1102                         {
1103                         if (!ssl_add_cert_to_buf(buf, l, x))
1104                                 return 0;
1105                         }
1106                 else
1107                         {
1108                         X509_STORE_CTX xs_ctx;
1109
1110                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1111                                 {
1112                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1113                                 return(0);
1114                                 }
1115                         X509_verify_cert(&xs_ctx);
1116                         /* Don't leave errors in the queue */
1117                         ERR_clear_error();
1118                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1119                                 {
1120                                 x = sk_X509_value(xs_ctx.chain, i);
1121
1122                                 if (!ssl_add_cert_to_buf(buf, l, x))
1123                                         {
1124                                         X509_STORE_CTX_cleanup(&xs_ctx);
1125                                         return 0;
1126                                         }
1127                                 }
1128                         X509_STORE_CTX_cleanup(&xs_ctx);
1129                         }
1130                 }
1131         for (i=0; i<sk_X509_num(extra_certs); i++)
1132                 {
1133                 x=sk_X509_value(extra_certs,i);
1134                 if (!ssl_add_cert_to_buf(buf, l, x))
1135                         return 0;
1136                 }
1137
1138         return 1;
1139         }
1140
1141 /* Build a certificate chain for current certificate */
1142 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1143         {
1144         CERT_PKEY *cpk = c->key;
1145         X509_STORE_CTX xs_ctx;
1146         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1147         X509 *x;
1148         int i;
1149
1150         if (!cpk->x509)
1151                 {
1152                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1153                 return 0;
1154                 }
1155
1156         if (c->chain_store)
1157                 chain_store = c->chain_store;
1158
1159         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1160                 untrusted = cpk->chain;
1161
1162         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1163                 {
1164                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1165                 return 0;
1166                 }
1167
1168         i = X509_verify_cert(&xs_ctx);
1169         if (i > 0)
1170                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1171         X509_STORE_CTX_cleanup(&xs_ctx);
1172         if (i <= 0)
1173                 {
1174                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1175                 return 0;
1176                 }
1177         if (cpk->chain)
1178                 sk_X509_pop_free(cpk->chain, X509_free);
1179         /* Remove EE certificate from chain */
1180         x = sk_X509_shift(chain);
1181         X509_free(x);
1182         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1183                 {
1184                 x = sk_X509_pop(chain);
1185                 X509_free(x);
1186                 }
1187         cpk->chain = chain;
1188
1189         return 1;
1190         }
1191
1192 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1193         {
1194         X509_STORE **pstore;
1195         if (chain)
1196                 pstore = &c->chain_store;
1197         else
1198                 pstore = &c->verify_store;
1199         if (*pstore)
1200                 X509_STORE_free(*pstore);
1201         *pstore = store;
1202         if (ref && store)
1203                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1204         return 1;
1205         }
1206