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         /* Configure sigalgs however we copy across */
 365         if (cert->conf_sigalgs)
 366                 {
 367                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
 368                                                         * sizeof(TLS_SIGALGS));
 369                 if (!ret->conf_sigalgs)
 370                         goto err;
 371                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 372                                 cert->conf_sigalgslen * sizeof(TLS_SIGALGS));
 373                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 374                 }
 375         else
 376                 ret->conf_sigalgs = NULL;
 377         /* Shared sigalgs also NULL */
 378         ret->shared_sigalgs = NULL;
 379
 380         ret->cert_flags = cert->cert_flags;
 381
 382         ret->cert_cb = cert->cert_cb;
 383         ret->cert_cb_arg = cert->cert_cb_arg;
 384
 385         return(ret);
 386
 387 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 388 err:
 389 #endif
 390 #ifndef OPENSSL_NO_RSA
 391         if (ret->rsa_tmp != NULL)
 392                 RSA_free(ret->rsa_tmp);
 393 #endif
 394 #ifndef OPENSSL_NO_DH
 395         if (ret->dh_tmp != NULL)
 396                 DH_free(ret->dh_tmp);
 397 #endif
 398 #ifndef OPENSSL_NO_ECDH
 399         if (ret->ecdh_tmp != NULL)
 400                 EC_KEY_free(ret->ecdh_tmp);
 401 #endif
 402
 403         ssl_cert_clear_certs(ret);
 404
 405         return NULL;
 406         }
 407
 408 /* Free up and clear all certificates and chains */
 409
 410 void ssl_cert_clear_certs(CERT *c)
 411         {
 412         int i;
 413         if (c == NULL)
 414                 return;
 415         for (i = 0; i<SSL_PKEY_NUM; i++)
 416                 {
 417                 CERT_PKEY *cpk = c->pkeys + i;
 418                 if (cpk->x509)
 419                         {
 420                         X509_free(cpk->x509);
 421                         cpk->x509 = NULL;
 422                         }
 423                 if (cpk->privatekey)
 424                         {
 425                         EVP_PKEY_free(cpk->privatekey);
 426                         cpk->privatekey = NULL;
 427                         }
 428                 if (cpk->chain)
 429                         {
 430                         sk_X509_pop_free(cpk->chain, X509_free);
 431                         cpk->chain = NULL;
 432                         }
 433 #ifndef OPENSSL_NO_TLSEXT
 434                 if (cpk->authz != NULL)
 435                         OPENSSL_free(cpk->authz);
 436 #endif
 437                 cpk->valid_flags = 0;
 438                 }
 439         }
 440
 441 void ssl_cert_free(CERT *c)
 442         {
 443         int i;
 444
 445         if(c == NULL)
 446             return;
 447
 448         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 449 #ifdef REF_PRINT
 450         REF_PRINT("CERT",c);
 451 #endif
 452         if (i > 0) return;
 453 #ifdef REF_CHECK
 454         if (i < 0)
 455                 {
 456                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 457                 abort(); /* ok */
 458                 }
 459 #endif
 460
 461 #ifndef OPENSSL_NO_RSA
 462         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 463 #endif
 464 #ifndef OPENSSL_NO_DH
 465         if (c->dh_tmp) DH_free(c->dh_tmp);
 466 #endif
 467 #ifndef OPENSSL_NO_ECDH
 468         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 469 #endif
 470
 471         ssl_cert_clear_certs(c);
 472         if (c->peer_sigalgs)
 473                 OPENSSL_free(c->peer_sigalgs);
 474         if (c->conf_sigalgs)
 475                 OPENSSL_free(c->conf_sigalgs);
 476         if (c->shared_sigalgs)
 477                 OPENSSL_free(c->shared_sigalgs);
 478         OPENSSL_free(c);
 479         }
 480
 481 int ssl_cert_inst(CERT **o)
 482         {
 483         /* Create a CERT if there isn't already one
 484          * (which cannot really happen, as it is initially created in
 485          * SSL_CTX_new; but the earlier code usually allows for that one
 486          * being non-existant, so we follow that behaviour, as it might
 487          * turn out that there actually is a reason for it -- but I'm
 488          * not sure that *all* of the existing code could cope with
 489          * s->cert being NULL, otherwise we could do without the
 490          * initialization in SSL_CTX_new).
 491          */
 492
 493         if (o == NULL)
 494                 {
 495                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 496                 return(0);
 497                 }
 498         if (*o == NULL)
 499                 {
 500                 if ((*o = ssl_cert_new()) == NULL)
 501                         {
 502                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 503                         return(0);
 504                         }
 505                 }
 506         return(1);
 507         }
 508
 509 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 510         {
 511         CERT_PKEY *cpk = c->key;
 512         if (!cpk)
 513                 return 0;
 514         if (cpk->chain)
 515                 sk_X509_pop_free(cpk->chain, X509_free);
 516         cpk->chain = chain;
 517         return 1;
 518         }
 519
 520 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 521         {
 522         STACK_OF(X509) *dchain;
 523         X509 *x;
 524         int i;
 525         if (!chain)
 526                 return ssl_cert_set0_chain(c, NULL);
 527         dchain = sk_X509_dup(chain);
 528         if (!dchain)
 529                 return 0;
 530         for (i = 0; i < sk_X509_num(dchain); i++)
 531                 {
 532                 x = sk_X509_value(dchain, i);
 533                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 534                 }
 535         if (!ssl_cert_set0_chain(c, dchain))
 536                 {
 537                 sk_X509_pop_free(dchain, X509_free);
 538                 return 0;
 539                 }
 540         return 1;
 541         }
 542
 543 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 544         {
 545         CERT_PKEY *cpk = c->key;
 546         if (!cpk)
 547                 return 0;
 548         if (!cpk->chain)
 549                 cpk->chain = sk_X509_new_null();
 550         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 551                 return 0;
 552         return 1;
 553         }
 554
 555 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 556         {
 557         if (!ssl_cert_add0_chain_cert(c, x))
 558                 return 0;
 559         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 560         return 1;
 561         }
 562
 563 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 564         {
 565         c->cert_cb = cb;
 566         c->cert_cb_arg = arg;
 567         }
 568
 569 SESS_CERT *ssl_sess_cert_new(void)
 570         {
 571         SESS_CERT *ret;
 572
 573         ret = OPENSSL_malloc(sizeof *ret);
 574         if (ret == NULL)
 575                 {
 576                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 577                 return NULL;
 578                 }
 579
 580         memset(ret, 0 ,sizeof *ret);
 581         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 582         ret->references = 1;
 583
 584         return ret;
 585         }
 586
 587 void ssl_sess_cert_free(SESS_CERT *sc)
 588         {
 589         int i;
 590
 591         if (sc == NULL)
 592                 return;
 593
 594         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 595 #ifdef REF_PRINT
 596         REF_PRINT("SESS_CERT", sc);
 597 #endif
 598         if (i > 0)
 599                 return;
 600 #ifdef REF_CHECK
 601         if (i < 0)
 602                 {
 603                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 604                 abort(); /* ok */
 605                 }
 606 #endif
 607
 608         /* i == 0 */
 609         if (sc->cert_chain != NULL)
 610                 sk_X509_pop_free(sc->cert_chain, X509_free);
 611         for (i = 0; i < SSL_PKEY_NUM; i++)
 612                 {
 613                 if (sc->peer_pkeys[i].x509 != NULL)
 614                         X509_free(sc->peer_pkeys[i].x509);
 615 #if 0 /* We don't have the peer's private key.  These lines are just
 616            * here as a reminder that we're still using a not-quite-appropriate
 617            * data structure. */
 618                 if (sc->peer_pkeys[i].privatekey != NULL)
 619                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 620 #endif
 621                 }
 622
 623 #ifndef OPENSSL_NO_RSA
 624         if (sc->peer_rsa_tmp != NULL)
 625                 RSA_free(sc->peer_rsa_tmp);
 626 #endif
 627 #ifndef OPENSSL_NO_DH
 628         if (sc->peer_dh_tmp != NULL)
 629                 DH_free(sc->peer_dh_tmp);
 630 #endif
 631 #ifndef OPENSSL_NO_ECDH
 632         if (sc->peer_ecdh_tmp != NULL)
 633                 EC_KEY_free(sc->peer_ecdh_tmp);
 634 #endif
 635
 636         OPENSSL_free(sc);
 637         }
 638
 639 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 640         {
 641         sc->peer_cert_type = type;
 642         return(1);
 643         }
 644
 645 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 646         {
 647         X509 *x;
 648         int i;
 649         X509_STORE_CTX ctx;
 650
 651         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 652                 return(0);
 653
 654         x=sk_X509_value(sk,0);
 655         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
 656                 {
 657                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 658                 return(0);
 659                 }
 660 #if 0
 661         if (SSL_get_verify_depth(s) >= 0)
 662                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 663 #endif
 664         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 665
 666         /* We need to inherit the verify parameters. These can be determined by
 667          * the context: if its a server it will verify SSL client certificates
 668          * or vice versa.
 669          */
 670
 671         X509_STORE_CTX_set_default(&ctx,
 672                                 s->server ? "ssl_client" : "ssl_server");
 673         /* Anything non-default in "param" should overwrite anything in the
 674          * ctx.
 675          */
 676         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 677
 678         if (s->verify_callback)
 679                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 680
 681         if (s->ctx->app_verify_callback != NULL)
 682 #if 1 /* new with OpenSSL 0.9.7 */
 683                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 684 #else
 685                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 686 #endif
 687         else
 688                 {
 689 #ifndef OPENSSL_NO_X509_VERIFY
 690                 i=X509_verify_cert(&ctx);
 691 #else
 692                 i=0;
 693                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 694                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 695 #endif
 696                 }
 697
 698         s->verify_result=ctx.error;
 699         X509_STORE_CTX_cleanup(&ctx);
 700
 701         return(i);
 702         }
 703
 704 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 705         {
 706         if (*ca_list != NULL)
 707                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 708
 709         *ca_list=name_list;
 710         }
 711
 712 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 713         {
 714         int i;
 715         STACK_OF(X509_NAME) *ret;
 716         X509_NAME *name;
 717
 718         ret=sk_X509_NAME_new_null();
 719         for (i=0; i<sk_X509_NAME_num(sk); i++)
 720                 {
 721                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 722                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 723                         {
 724                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 725                         return(NULL);
 726                         }
 727                 }
 728         return(ret);
 729         }
 730
 731 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 732         {
 733         set_client_CA_list(&(s->client_CA),name_list);
 734         }
 735
 736 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 737         {
 738         set_client_CA_list(&(ctx->client_CA),name_list);
 739         }
 740
 741 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 742         {
 743         return(ctx->client_CA);
 744         }
 745
 746 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 747         {
 748         if (s->type == SSL_ST_CONNECT)
 749                 { /* we are in the client */
 750                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 751                         (s->s3 != NULL))
 752                         return(s->s3->tmp.ca_names);
 753                 else
 754                         return(NULL);
 755                 }
 756         else
 757                 {
 758                 if (s->client_CA != NULL)
 759                         return(s->client_CA);
 760                 else
 761                         return(s->ctx->client_CA);
 762                 }
 763         }
 764
 765 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 766         {
 767         X509_NAME *name;
 768
 769         if (x == NULL) return(0);
 770         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 771                 return(0);
 772
 773         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 774                 return(0);
 775
 776         if (!sk_X509_NAME_push(*sk,name))
 777                 {
 778                 X509_NAME_free(name);
 779                 return(0);
 780                 }
 781         return(1);
 782         }
 783
 784 int SSL_add_client_CA(SSL *ssl,X509 *x)
 785         {
 786         return(add_client_CA(&(ssl->client_CA),x));
 787         }
 788
 789 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 790         {
 791         return(add_client_CA(&(ctx->client_CA),x));
 792         }
 793
 794 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 795         {
 796         return(X509_NAME_cmp(*a,*b));
 797         }
 798
 799 #ifndef OPENSSL_NO_STDIO
 800 /*!
 801  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 802  * it doesn't really have anything to do with clients (except that a common use
 803  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 804  * much to do with CAs, either, since it will load any old cert.
 805  * \param file the file containing one or more certs.
 806  * \return a ::STACK containing the certs.
 807  */
 808 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 809         {
 810         BIO *in;
 811         X509 *x=NULL;
 812         X509_NAME *xn=NULL;
 813         STACK_OF(X509_NAME) *ret = NULL,*sk;
 814
 815         sk=sk_X509_NAME_new(xname_cmp);
 816
 817         in=BIO_new(BIO_s_file_internal());
 818
 819         if ((sk == NULL) || (in == NULL))
 820                 {
 821                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 822                 goto err;
 823                 }
 824
 825         if (!BIO_read_filename(in,file))
 826                 goto err;
 827
 828         for (;;)
 829                 {
 830                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 831                         break;
 832                 if (ret == NULL)
 833                         {
 834                         ret = sk_X509_NAME_new_null();
 835                         if (ret == NULL)
 836                                 {
 837                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 838                                 goto err;
 839                                 }
 840                         }
 841                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 842                 /* check for duplicates */
 843                 xn=X509_NAME_dup(xn);
 844                 if (xn == NULL) goto err;
 845                 if (sk_X509_NAME_find(sk,xn) >= 0)
 846                         X509_NAME_free(xn);
 847                 else
 848                         {
 849                         sk_X509_NAME_push(sk,xn);
 850                         sk_X509_NAME_push(ret,xn);
 851                         }
 852                 }
 853
 854         if (0)
 855                 {
 856 err:
 857                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 858                 ret=NULL;
 859                 }
 860         if (sk != NULL) sk_X509_NAME_free(sk);
 861         if (in != NULL) BIO_free(in);
 862         if (x != NULL) X509_free(x);
 863         if (ret != NULL)
 864                 ERR_clear_error();
 865         return(ret);
 866         }
 867 #endif
 868
 869 /*!
 870  * Add a file of certs to a stack.
 871  * \param stack the stack to add to.
 872  * \param file the file to add from. All certs in this file that are not
 873  * already in the stack will be added.
 874  * \return 1 for success, 0 for failure. Note that in the case of failure some
 875  * certs may have been added to \c stack.
 876  */
 877
 878 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 879                                         const char *file)
 880         {
 881         BIO *in;
 882         X509 *x=NULL;
 883         X509_NAME *xn=NULL;
 884         int ret=1;
 885         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 886
 887         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 888
 889         in=BIO_new(BIO_s_file_internal());
 890
 891         if (in == NULL)
 892                 {
 893                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
 894                 goto err;
 895                 }
 896
 897         if (!BIO_read_filename(in,file))
 898                 goto err;
 899
 900         for (;;)
 901                 {
 902                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 903                         break;
 904                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 905                 xn=X509_NAME_dup(xn);
 906                 if (xn == NULL) goto err;
 907                 if (sk_X509_NAME_find(stack,xn) >= 0)
 908                         X509_NAME_free(xn);
 909                 else
 910                         sk_X509_NAME_push(stack,xn);
 911                 }
 912
 913         ERR_clear_error();
 914
 915         if (0)
 916                 {
 917 err:
 918                 ret=0;
 919                 }
 920         if(in != NULL)
 921                 BIO_free(in);
 922         if(x != NULL)
 923                 X509_free(x);
 924
 925         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 926
 927         return ret;
 928         }
 929
 930 /*!
 931  * Add a directory of certs to a stack.
 932  * \param stack the stack to append to.
 933  * \param dir the directory to append from. All files in this directory will be
 934  * examined as potential certs. Any that are acceptable to
 935  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 936  * included.
 937  * \return 1 for success, 0 for failure. Note that in the case of failure some
 938  * certs may have been added to \c stack.
 939  */
 940
 941 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 942                                        const char *dir)
 943         {
 944         OPENSSL_DIR_CTX *d = NULL;
 945         const char *filename;
 946         int ret = 0;
 947
 948         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
 949
 950         /* Note that a side effect is that the CAs will be sorted by name */
 951
 952         while((filename = OPENSSL_DIR_read(&d, dir)))
 953                 {
 954                 char buf[1024];
 955                 int r;
 956
 957                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
 958                         {
 959                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
 960                         goto err;
 961                         }
 962
 963 #ifdef OPENSSL_SYS_VMS
 964                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
 965 #else
 966                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
 967 #endif
 968                 if (r <= 0 || r >= (int)sizeof(buf))
 969                         goto err;
 970                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
 971                         goto err;
 972                 }
 973
 974         if (errno)
 975                 {
 976                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
 977                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
 978                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
 979                 goto err;
 980                 }
 981
 982         ret = 1;
 983
 984 err:
 985         if (d) OPENSSL_DIR_end(&d);
 986         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
 987         return ret;
 988         }
 989
 990 /* Add a certificate to a BUF_MEM structure */
 991
 992 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 993         {
 994         int n;
 995         unsigned char *p;
 996
 997         n=i2d_X509(x,NULL);
 998         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
 999                 {
1000                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1001                 return 0;
1002                 }
1003         p=(unsigned char *)&(buf->data[*l]);
1004         l2n3(n,p);
1005         i2d_X509(x,&p);
1006         *l+=n+3;
1007
1008         return 1;
1009         }
1010
1011 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1012 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1013         {
1014         BUF_MEM *buf = s->init_buf;
1015         int no_chain;
1016         int i;
1017
1018         X509 *x;
1019         STACK_OF(X509) *extra_certs;
1020
1021         if (cpk)
1022                 x = cpk->x509;
1023         else
1024                 x = NULL;
1025
1026         /* If we have a certificate specific chain use it, else use
1027          * parent ctx.
1028          */
1029         if (cpk && cpk->chain)
1030                 extra_certs = cpk->chain;
1031         else
1032                 extra_certs = s->ctx->extra_certs;
1033
1034         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1035                 no_chain = 1;
1036         else
1037                 no_chain = 0;
1038
1039         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1040         if (!BUF_MEM_grow_clean(buf,10))
1041                 {
1042                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1043                 return 0;
1044                 }
1045         if (x != NULL)
1046                 {
1047                 if (no_chain)
1048                         {
1049                         if (!ssl_add_cert_to_buf(buf, l, x))
1050                                 return 0;
1051                         }
1052                 else
1053                         {
1054                         X509_STORE_CTX xs_ctx;
1055
1056                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
1057                                 {
1058                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1059                                 return(0);
1060                                 }
1061                         X509_verify_cert(&xs_ctx);
1062                         /* Don't leave errors in the queue */
1063                         ERR_clear_error();
1064                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1065                                 {
1066                                 x = sk_X509_value(xs_ctx.chain, i);
1067
1068                                 if (!ssl_add_cert_to_buf(buf, l, x))
1069                                         {
1070                                         X509_STORE_CTX_cleanup(&xs_ctx);
1071                                         return 0;
1072                                         }
1073                                 }
1074                         X509_STORE_CTX_cleanup(&xs_ctx);
1075                         }
1076                 }
1077         for (i=0; i<sk_X509_num(extra_certs); i++)
1078                 {
1079                 x=sk_X509_value(extra_certs,i);
1080                 if (!ssl_add_cert_to_buf(buf, l, x))
1081                         return 0;
1082                 }
1083
1084         return 1;
1085         }
1086