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                 if (cert->pkeys[i].authz != NULL)
 338                         {
 339                         /* Just copy everything. */
 340                         ret->pkeys[i].authz_length =
 341                                 cert->pkeys[i].authz_length;
 342                         ret->pkeys[i].authz =
 343                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
 344                         if (ret->pkeys[i].authz == NULL)
 345                                 {
 346                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 347                                 return(NULL);
 348                                 }
 349                         memcpy(ret->pkeys[i].authz,
 350                                cert->pkeys[i].authz,
 351                                cert->pkeys[i].authz_length);
 352                         }
 353                 }
 354
 355         ret->references=1;
 356         /* Set digests to defaults. NB: we don't copy existing values as they
 357          * will be set during handshake.
 358          */
 359         ssl_cert_set_default_md(ret);
 360         /* Peer sigalgs set to NULL as we get these from handshake too */
 361         ret->peer_sigalgs = NULL;
 362         ret->peer_sigalgslen = 0;
 363         /* Configure sigalgs however we copy across */
 364         if (cert->conf_sigalgs)
 365                 {
 366                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
 367                                                         * sizeof(TLS_SIGALGS));
 368                 if (!ret->conf_sigalgs)
 369                         goto err;
 370                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 371                                 cert->conf_sigalgslen * sizeof(TLS_SIGALGS));
 372                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 373                 }
 374         else
 375                 ret->conf_sigalgs = NULL;
 376         /* Shared sigalgs also NULL */
 377         ret->shared_sigalgs = NULL;
 378
 379         return(ret);
 380
 381 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 382 err:
 383 #endif
 384 #ifndef OPENSSL_NO_RSA
 385         if (ret->rsa_tmp != NULL)
 386                 RSA_free(ret->rsa_tmp);
 387 #endif
 388 #ifndef OPENSSL_NO_DH
 389         if (ret->dh_tmp != NULL)
 390                 DH_free(ret->dh_tmp);
 391 #endif
 392 #ifndef OPENSSL_NO_ECDH
 393         if (ret->ecdh_tmp != NULL)
 394                 EC_KEY_free(ret->ecdh_tmp);
 395 #endif
 396
 397         ssl_cert_clear_certs(ret);
 398
 399         return NULL;
 400         }
 401
 402 /* Free up and clear all certificates and chains */
 403
 404 void ssl_cert_clear_certs(CERT *c)
 405         {
 406         int i;
 407         if (c == NULL)
 408                 return;
 409         for (i = 0; i<SSL_PKEY_NUM; i++)
 410                 {
 411                 CERT_PKEY *cpk = c->pkeys + i;
 412                 if (cpk->x509)
 413                         {
 414                         X509_free(cpk->x509);
 415                         cpk->x509 = NULL;
 416                         }
 417                 if (cpk->privatekey)
 418                         {
 419                         EVP_PKEY_free(cpk->privatekey);
 420                         cpk->privatekey = NULL;
 421                         }
 422                 if (cpk->chain)
 423                         {
 424                         sk_X509_pop_free(cpk->chain, X509_free);
 425                         cpk->chain = NULL;
 426                         }
 427 #ifndef OPENSSL_NO_TLSEXT
 428                 if (cpk->authz != NULL)
 429                         OPENSSL_free(cpk->authz);
 430 #endif
 431                 }
 432         }
 433
 434 void ssl_cert_free(CERT *c)
 435         {
 436         int i;
 437
 438         if(c == NULL)
 439             return;
 440
 441         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 442 #ifdef REF_PRINT
 443         REF_PRINT("CERT",c);
 444 #endif
 445         if (i > 0) return;
 446 #ifdef REF_CHECK
 447         if (i < 0)
 448                 {
 449                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 450                 abort(); /* ok */
 451                 }
 452 #endif
 453
 454 #ifndef OPENSSL_NO_RSA
 455         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 456 #endif
 457 #ifndef OPENSSL_NO_DH
 458         if (c->dh_tmp) DH_free(c->dh_tmp);
 459 #endif
 460 #ifndef OPENSSL_NO_ECDH
 461         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 462 #endif
 463
 464         ssl_cert_clear_certs(c);
 465         if (c->peer_sigalgs)
 466                 OPENSSL_free(c->peer_sigalgs);
 467         if (c->conf_sigalgs)
 468                 OPENSSL_free(c->conf_sigalgs);
 469         if (c->shared_sigalgs)
 470                 OPENSSL_free(c->shared_sigalgs);
 471         OPENSSL_free(c);
 472         }
 473
 474 int ssl_cert_inst(CERT **o)
 475         {
 476         /* Create a CERT if there isn't already one
 477          * (which cannot really happen, as it is initially created in
 478          * SSL_CTX_new; but the earlier code usually allows for that one
 479          * being non-existant, so we follow that behaviour, as it might
 480          * turn out that there actually is a reason for it -- but I'm
 481          * not sure that *all* of the existing code could cope with
 482          * s->cert being NULL, otherwise we could do without the
 483          * initialization in SSL_CTX_new).
 484          */
 485
 486         if (o == NULL)
 487                 {
 488                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 489                 return(0);
 490                 }
 491         if (*o == NULL)
 492                 {
 493                 if ((*o = ssl_cert_new()) == NULL)
 494                         {
 495                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 496                         return(0);
 497                         }
 498                 }
 499         return(1);
 500         }
 501
 502 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 503         {
 504         CERT_PKEY *cpk = c->key;
 505         if (!cpk)
 506                 return 0;
 507         if (cpk->chain)
 508                 sk_X509_pop_free(cpk->chain, X509_free);
 509         cpk->chain = chain;
 510         return 1;
 511         }
 512
 513 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 514         {
 515         STACK_OF(X509) *dchain;
 516         X509 *x;
 517         int i;
 518         if (!chain)
 519                 return ssl_cert_set0_chain(c, NULL);
 520         dchain = sk_X509_dup(chain);
 521         if (!dchain)
 522                 return 0;
 523         for (i = 0; i < sk_X509_num(dchain); i++)
 524                 {
 525                 x = sk_X509_value(dchain, i);
 526                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 527                 }
 528         if (!ssl_cert_set0_chain(c, dchain))
 529                 {
 530                 sk_X509_pop_free(dchain, X509_free);
 531                 return 0;
 532                 }
 533         return 1;
 534         }
 535
 536 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 537         {
 538         CERT_PKEY *cpk = c->key;
 539         if (!cpk)
 540                 return 0;
 541         if (!cpk->chain)
 542                 cpk->chain = sk_X509_new_null();
 543         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 544                 return 0;
 545         return 1;
 546         }
 547
 548 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 549         {
 550         if (!ssl_cert_add0_chain_cert(c, x))
 551                 return 0;
 552         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 553         return 1;
 554         }
 555
 556 SESS_CERT *ssl_sess_cert_new(void)
 557         {
 558         SESS_CERT *ret;
 559
 560         ret = OPENSSL_malloc(sizeof *ret);
 561         if (ret == NULL)
 562                 {
 563                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 564                 return NULL;
 565                 }
 566
 567         memset(ret, 0 ,sizeof *ret);
 568         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 569         ret->references = 1;
 570
 571         return ret;
 572         }
 573
 574 void ssl_sess_cert_free(SESS_CERT *sc)
 575         {
 576         int i;
 577
 578         if (sc == NULL)
 579                 return;
 580
 581         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 582 #ifdef REF_PRINT
 583         REF_PRINT("SESS_CERT", sc);
 584 #endif
 585         if (i > 0)
 586                 return;
 587 #ifdef REF_CHECK
 588         if (i < 0)
 589                 {
 590                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 591                 abort(); /* ok */
 592                 }
 593 #endif
 594
 595         /* i == 0 */
 596         if (sc->cert_chain != NULL)
 597                 sk_X509_pop_free(sc->cert_chain, X509_free);
 598         for (i = 0; i < SSL_PKEY_NUM; i++)
 599                 {
 600                 if (sc->peer_pkeys[i].x509 != NULL)
 601                         X509_free(sc->peer_pkeys[i].x509);
 602 #if 0 /* We don't have the peer's private key.  These lines are just
 603            * here as a reminder that we're still using a not-quite-appropriate
 604            * data structure. */
 605                 if (sc->peer_pkeys[i].privatekey != NULL)
 606                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 607 #endif
 608                 }
 609
 610 #ifndef OPENSSL_NO_RSA
 611         if (sc->peer_rsa_tmp != NULL)
 612                 RSA_free(sc->peer_rsa_tmp);
 613 #endif
 614 #ifndef OPENSSL_NO_DH
 615         if (sc->peer_dh_tmp != NULL)
 616                 DH_free(sc->peer_dh_tmp);
 617 #endif
 618 #ifndef OPENSSL_NO_ECDH
 619         if (sc->peer_ecdh_tmp != NULL)
 620                 EC_KEY_free(sc->peer_ecdh_tmp);
 621 #endif
 622
 623         OPENSSL_free(sc);
 624         }
 625
 626 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 627         {
 628         sc->peer_cert_type = type;
 629         return(1);
 630         }
 631
 632 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 633         {
 634         X509 *x;
 635         int i;
 636         X509_STORE_CTX ctx;
 637
 638         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 639                 return(0);
 640
 641         x=sk_X509_value(sk,0);
 642         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
 643                 {
 644                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 645                 return(0);
 646                 }
 647 #if 0
 648         if (SSL_get_verify_depth(s) >= 0)
 649                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 650 #endif
 651         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 652
 653         /* We need to inherit the verify parameters. These can be determined by
 654          * the context: if its a server it will verify SSL client certificates
 655          * or vice versa.
 656          */
 657
 658         X509_STORE_CTX_set_default(&ctx,
 659                                 s->server ? "ssl_client" : "ssl_server");
 660         /* Anything non-default in "param" should overwrite anything in the
 661          * ctx.
 662          */
 663         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 664
 665         if (s->verify_callback)
 666                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 667
 668         if (s->ctx->app_verify_callback != NULL)
 669 #if 1 /* new with OpenSSL 0.9.7 */
 670                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 671 #else
 672                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 673 #endif
 674         else
 675                 {
 676 #ifndef OPENSSL_NO_X509_VERIFY
 677                 i=X509_verify_cert(&ctx);
 678 #else
 679                 i=0;
 680                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 681                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 682 #endif
 683                 }
 684
 685         s->verify_result=ctx.error;
 686         X509_STORE_CTX_cleanup(&ctx);
 687
 688         return(i);
 689         }
 690
 691 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 692         {
 693         if (*ca_list != NULL)
 694                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 695
 696         *ca_list=name_list;
 697         }
 698
 699 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 700         {
 701         int i;
 702         STACK_OF(X509_NAME) *ret;
 703         X509_NAME *name;
 704
 705         ret=sk_X509_NAME_new_null();
 706         for (i=0; i<sk_X509_NAME_num(sk); i++)
 707                 {
 708                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 709                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 710                         {
 711                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 712                         return(NULL);
 713                         }
 714                 }
 715         return(ret);
 716         }
 717
 718 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 719         {
 720         set_client_CA_list(&(s->client_CA),name_list);
 721         }
 722
 723 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 724         {
 725         set_client_CA_list(&(ctx->client_CA),name_list);
 726         }
 727
 728 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 729         {
 730         return(ctx->client_CA);
 731         }
 732
 733 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 734         {
 735         if (s->type == SSL_ST_CONNECT)
 736                 { /* we are in the client */
 737                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 738                         (s->s3 != NULL))
 739                         return(s->s3->tmp.ca_names);
 740                 else
 741                         return(NULL);
 742                 }
 743         else
 744                 {
 745                 if (s->client_CA != NULL)
 746                         return(s->client_CA);
 747                 else
 748                         return(s->ctx->client_CA);
 749                 }
 750         }
 751
 752 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 753         {
 754         X509_NAME *name;
 755
 756         if (x == NULL) return(0);
 757         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 758                 return(0);
 759
 760         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 761                 return(0);
 762
 763         if (!sk_X509_NAME_push(*sk,name))
 764                 {
 765                 X509_NAME_free(name);
 766                 return(0);
 767                 }
 768         return(1);
 769         }
 770
 771 int SSL_add_client_CA(SSL *ssl,X509 *x)
 772         {
 773         return(add_client_CA(&(ssl->client_CA),x));
 774         }
 775
 776 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 777         {
 778         return(add_client_CA(&(ctx->client_CA),x));
 779         }
 780
 781 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 782         {
 783         return(X509_NAME_cmp(*a,*b));
 784         }
 785
 786 #ifndef OPENSSL_NO_STDIO
 787 /*!
 788  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 789  * it doesn't really have anything to do with clients (except that a common use
 790  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 791  * much to do with CAs, either, since it will load any old cert.
 792  * \param file the file containing one or more certs.
 793  * \return a ::STACK containing the certs.
 794  */
 795 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 796         {
 797         BIO *in;
 798         X509 *x=NULL;
 799         X509_NAME *xn=NULL;
 800         STACK_OF(X509_NAME) *ret = NULL,*sk;
 801
 802         sk=sk_X509_NAME_new(xname_cmp);
 803
 804         in=BIO_new(BIO_s_file_internal());
 805
 806         if ((sk == NULL) || (in == NULL))
 807                 {
 808                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 809                 goto err;
 810                 }
 811
 812         if (!BIO_read_filename(in,file))
 813                 goto err;
 814
 815         for (;;)
 816                 {
 817                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 818                         break;
 819                 if (ret == NULL)
 820                         {
 821                         ret = sk_X509_NAME_new_null();
 822                         if (ret == NULL)
 823                                 {
 824                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 825                                 goto err;
 826                                 }
 827                         }
 828                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 829                 /* check for duplicates */
 830                 xn=X509_NAME_dup(xn);
 831                 if (xn == NULL) goto err;
 832                 if (sk_X509_NAME_find(sk,xn) >= 0)
 833                         X509_NAME_free(xn);
 834                 else
 835                         {
 836                         sk_X509_NAME_push(sk,xn);
 837                         sk_X509_NAME_push(ret,xn);
 838                         }
 839                 }
 840
 841         if (0)
 842                 {
 843 err:
 844                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 845                 ret=NULL;
 846                 }
 847         if (sk != NULL) sk_X509_NAME_free(sk);
 848         if (in != NULL) BIO_free(in);
 849         if (x != NULL) X509_free(x);
 850         if (ret != NULL)
 851                 ERR_clear_error();
 852         return(ret);
 853         }
 854 #endif
 855
 856 /*!
 857  * Add a file of certs to a stack.
 858  * \param stack the stack to add to.
 859  * \param file the file to add from. All certs in this file that are not
 860  * already in the stack will be added.
 861  * \return 1 for success, 0 for failure. Note that in the case of failure some
 862  * certs may have been added to \c stack.
 863  */
 864
 865 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 866                                         const char *file)
 867         {
 868         BIO *in;
 869         X509 *x=NULL;
 870         X509_NAME *xn=NULL;
 871         int ret=1;
 872         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 873
 874         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 875
 876         in=BIO_new(BIO_s_file_internal());
 877
 878         if (in == NULL)
 879                 {
 880                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
 881                 goto err;
 882                 }
 883
 884         if (!BIO_read_filename(in,file))
 885                 goto err;
 886
 887         for (;;)
 888                 {
 889                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 890                         break;
 891                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 892                 xn=X509_NAME_dup(xn);
 893                 if (xn == NULL) goto err;
 894                 if (sk_X509_NAME_find(stack,xn) >= 0)
 895                         X509_NAME_free(xn);
 896                 else
 897                         sk_X509_NAME_push(stack,xn);
 898                 }
 899
 900         ERR_clear_error();
 901
 902         if (0)
 903                 {
 904 err:
 905                 ret=0;
 906                 }
 907         if(in != NULL)
 908                 BIO_free(in);
 909         if(x != NULL)
 910                 X509_free(x);
 911
 912         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 913
 914         return ret;
 915         }
 916
 917 /*!
 918  * Add a directory of certs to a stack.
 919  * \param stack the stack to append to.
 920  * \param dir the directory to append from. All files in this directory will be
 921  * examined as potential certs. Any that are acceptable to
 922  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 923  * included.
 924  * \return 1 for success, 0 for failure. Note that in the case of failure some
 925  * certs may have been added to \c stack.
 926  */
 927
 928 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 929                                        const char *dir)
 930         {
 931         OPENSSL_DIR_CTX *d = NULL;
 932         const char *filename;
 933         int ret = 0;
 934
 935         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
 936
 937         /* Note that a side effect is that the CAs will be sorted by name */
 938
 939         while((filename = OPENSSL_DIR_read(&d, dir)))
 940                 {
 941                 char buf[1024];
 942                 int r;
 943
 944                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
 945                         {
 946                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
 947                         goto err;
 948                         }
 949
 950 #ifdef OPENSSL_SYS_VMS
 951                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
 952 #else
 953                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
 954 #endif
 955                 if (r <= 0 || r >= (int)sizeof(buf))
 956                         goto err;
 957                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
 958                         goto err;
 959                 }
 960
 961         if (errno)
 962                 {
 963                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
 964                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
 965                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
 966                 goto err;
 967                 }
 968
 969         ret = 1;
 970
 971 err:
 972         if (d) OPENSSL_DIR_end(&d);
 973         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
 974         return ret;
 975         }
 976
 977 /* Add a certificate to a BUF_MEM structure */
 978
 979 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 980         {
 981         int n;
 982         unsigned char *p;
 983
 984         n=i2d_X509(x,NULL);
 985         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
 986                 {
 987                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
 988                 return 0;
 989                 }
 990         p=(unsigned char *)&(buf->data[*l]);
 991         l2n3(n,p);
 992         i2d_X509(x,&p);
 993         *l+=n+3;
 994
 995         return 1;
 996         }
 997
 998 /* Add certificate chain to internal SSL BUF_MEM strcuture */
 999 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1000         {
1001         BUF_MEM *buf = s->init_buf;
1002         int no_chain;
1003         int i;
1004
1005         X509 *x;
1006         STACK_OF(X509) *extra_certs;
1007
1008         if (cpk)
1009                 x = cpk->x509;
1010         else
1011                 x = NULL;
1012
1013         /* If we have a certificate specific chain use it, else use
1014          * parent ctx.
1015          */
1016         if (cpk && cpk->chain)
1017                 extra_certs = cpk->chain;
1018         else
1019                 extra_certs = s->ctx->extra_certs;
1020
1021         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1022                 no_chain = 1;
1023         else
1024                 no_chain = 0;
1025
1026         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1027         if (!BUF_MEM_grow_clean(buf,10))
1028                 {
1029                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1030                 return 0;
1031                 }
1032         if (x != NULL)
1033                 {
1034                 if (no_chain)
1035                         {
1036                         if (!ssl_add_cert_to_buf(buf, l, x))
1037                                 return 0;
1038                         }
1039                 else
1040                         {
1041                         X509_STORE_CTX xs_ctx;
1042
1043                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
1044                                 {
1045                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1046                                 return(0);
1047                                 }
1048                         X509_verify_cert(&xs_ctx);
1049                         /* Don't leave errors in the queue */
1050                         ERR_clear_error();
1051                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1052                                 {
1053                                 x = sk_X509_value(xs_ctx.chain, i);
1054
1055                                 if (!ssl_add_cert_to_buf(buf, l, x))
1056                                         {
1057                                         X509_STORE_CTX_cleanup(&xs_ctx);
1058                                         return 0;
1059                                         }
1060                                 }
1061                         X509_STORE_CTX_cleanup(&xs_ctx);
1062                         }
1063                 }
1064         for (i=0; i<sk_X509_num(extra_certs); i++)
1065                 {
1066                 x=sk_X509_value(extra_certs,i);
1067                 if (!ssl_add_cert_to_buf(buf, l, x))
1068                         return 0;
1069                 }
1070
1071         return 1;
1072         }
1073