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