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                         rpk->chain = X509_chain_up_ref(cpk->chain);
 325                         if (!rpk->chain)
 326                                 {
 327                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 328                                 goto err;
 329                                 }
 330                         }
 331                 rpk->valid_flags = 0;
 332 #ifndef OPENSSL_NO_TLSEXT
 333                 if (cert->pkeys[i].serverinfo != NULL)
 334                         {
 335                         /* Just copy everything. */
 336                         ret->pkeys[i].serverinfo =
 337                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 338                         if (ret->pkeys[i].serverinfo == NULL)
 339                                 {
 340                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 341                                 return NULL;
 342                                 }
 343                         ret->pkeys[i].serverinfo_length =
 344                                 cert->pkeys[i].serverinfo_length;
 345                         memcpy(ret->pkeys[i].serverinfo,
 346                                cert->pkeys[i].serverinfo,
 347                                cert->pkeys[i].serverinfo_length);
 348                         }
 349 #endif
 350                 }
 351
 352         ret->references=1;
 353         /* Set digests to defaults. NB: we don't copy existing values as they
 354          * will be set during handshake.
 355          */
 356         ssl_cert_set_default_md(ret);
 357         /* Peer sigalgs set to NULL as we get these from handshake too */
 358         ret->peer_sigalgs = NULL;
 359         ret->peer_sigalgslen = 0;
 360         /* Configured sigalgs however we copy across */
 361
 362         if (cert->conf_sigalgs)
 363                 {
 364                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 365                 if (!ret->conf_sigalgs)
 366                         goto err;
 367                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 368                                                 cert->conf_sigalgslen);
 369                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 370                 }
 371         else
 372                 ret->conf_sigalgs = NULL;
 373
 374         if (cert->client_sigalgs)
 375                 {
 376                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 377                 if (!ret->client_sigalgs)
 378                         goto err;
 379                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 380                                                 cert->client_sigalgslen);
 381                 ret->client_sigalgslen = cert->client_sigalgslen;
 382                 }
 383         else
 384                 ret->client_sigalgs = NULL;
 385         /* Shared sigalgs also NULL */
 386         ret->shared_sigalgs = NULL;
 387         /* Copy any custom client certificate types */
 388         if (cert->ctypes)
 389                 {
 390                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 391                 if (!ret->ctypes)
 392                         goto err;
 393                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 394                 ret->ctype_num = cert->ctype_num;
 395                 }
 396
 397         ret->cert_flags = cert->cert_flags;
 398
 399         ret->cert_cb = cert->cert_cb;
 400         ret->cert_cb_arg = cert->cert_cb_arg;
 401
 402         if (cert->verify_store)
 403                 {
 404                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 405                 ret->verify_store = cert->verify_store;
 406                 }
 407
 408         if (cert->chain_store)
 409                 {
 410                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 411                 ret->chain_store = cert->chain_store;
 412                 }
 413
 414         ret->ciphers_raw = NULL;
 415
 416         return(ret);
 417
 418 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 419 err:
 420 #endif
 421 #ifndef OPENSSL_NO_RSA
 422         if (ret->rsa_tmp != NULL)
 423                 RSA_free(ret->rsa_tmp);
 424 #endif
 425 #ifndef OPENSSL_NO_DH
 426         if (ret->dh_tmp != NULL)
 427                 DH_free(ret->dh_tmp);
 428 #endif
 429 #ifndef OPENSSL_NO_ECDH
 430         if (ret->ecdh_tmp != NULL)
 431                 EC_KEY_free(ret->ecdh_tmp);
 432 #endif
 433
 434         ssl_cert_clear_certs(ret);
 435
 436         return NULL;
 437         }
 438
 439 /* Free up and clear all certificates and chains */
 440
 441 void ssl_cert_clear_certs(CERT *c)
 442         {
 443         int i;
 444         if (c == NULL)
 445                 return;
 446         for (i = 0; i<SSL_PKEY_NUM; i++)
 447                 {
 448                 CERT_PKEY *cpk = c->pkeys + i;
 449                 if (cpk->x509)
 450                         {
 451                         X509_free(cpk->x509);
 452                         cpk->x509 = NULL;
 453                         }
 454                 if (cpk->privatekey)
 455                         {
 456                         EVP_PKEY_free(cpk->privatekey);
 457                         cpk->privatekey = NULL;
 458                         }
 459                 if (cpk->chain)
 460                         {
 461                         sk_X509_pop_free(cpk->chain, X509_free);
 462                         cpk->chain = NULL;
 463                         }
 464 #ifndef OPENSSL_NO_TLSEXT
 465                 if (cpk->serverinfo)
 466                         {
 467                         OPENSSL_free(cpk->serverinfo);
 468                         cpk->serverinfo = NULL;
 469                         cpk->serverinfo_length = 0;
 470                         }
 471 #endif
 472                 /* Clear all flags apart from explicit sign */
 473                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 474                 }
 475         }
 476
 477 void ssl_cert_free(CERT *c)
 478         {
 479         int i;
 480
 481         if(c == NULL)
 482             return;
 483
 484         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 485 #ifdef REF_PRINT
 486         REF_PRINT("CERT",c);
 487 #endif
 488         if (i > 0) return;
 489 #ifdef REF_CHECK
 490         if (i < 0)
 491                 {
 492                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 493                 abort(); /* ok */
 494                 }
 495 #endif
 496
 497 #ifndef OPENSSL_NO_RSA
 498         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 499 #endif
 500 #ifndef OPENSSL_NO_DH
 501         if (c->dh_tmp) DH_free(c->dh_tmp);
 502 #endif
 503 #ifndef OPENSSL_NO_ECDH
 504         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 505 #endif
 506
 507         ssl_cert_clear_certs(c);
 508         if (c->peer_sigalgs)
 509                 OPENSSL_free(c->peer_sigalgs);
 510         if (c->conf_sigalgs)
 511                 OPENSSL_free(c->conf_sigalgs);
 512         if (c->client_sigalgs)
 513                 OPENSSL_free(c->client_sigalgs);
 514         if (c->shared_sigalgs)
 515                 OPENSSL_free(c->shared_sigalgs);
 516         if (c->ctypes)
 517                 OPENSSL_free(c->ctypes);
 518         if (c->verify_store)
 519                 X509_STORE_free(c->verify_store);
 520         if (c->chain_store)
 521                 X509_STORE_free(c->chain_store);
 522         if (c->ciphers_raw)
 523                 OPENSSL_free(c->ciphers_raw);
 524         OPENSSL_free(c);
 525         }
 526
 527 int ssl_cert_inst(CERT **o)
 528         {
 529         /* Create a CERT if there isn't already one
 530          * (which cannot really happen, as it is initially created in
 531          * SSL_CTX_new; but the earlier code usually allows for that one
 532          * being non-existant, so we follow that behaviour, as it might
 533          * turn out that there actually is a reason for it -- but I'm
 534          * not sure that *all* of the existing code could cope with
 535          * s->cert being NULL, otherwise we could do without the
 536          * initialization in SSL_CTX_new).
 537          */
 538
 539         if (o == NULL)
 540                 {
 541                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 542                 return(0);
 543                 }
 544         if (*o == NULL)
 545                 {
 546                 if ((*o = ssl_cert_new()) == NULL)
 547                         {
 548                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 549                         return(0);
 550                         }
 551                 }
 552         return(1);
 553         }
 554
 555 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 556         {
 557         CERT_PKEY *cpk = c->key;
 558         if (!cpk)
 559                 return 0;
 560         if (cpk->chain)
 561                 sk_X509_pop_free(cpk->chain, X509_free);
 562         cpk->chain = chain;
 563         return 1;
 564         }
 565
 566 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 567         {
 568         STACK_OF(X509) *dchain;
 569         if (!chain)
 570                 return ssl_cert_set0_chain(c, NULL);
 571         dchain = X509_chain_up_ref(chain);
 572         if (!dchain)
 573                 return 0;
 574         if (!ssl_cert_set0_chain(c, dchain))
 575                 {
 576                 sk_X509_pop_free(dchain, X509_free);
 577                 return 0;
 578                 }
 579         return 1;
 580         }
 581
 582 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 583         {
 584         CERT_PKEY *cpk = c->key;
 585         if (!cpk)
 586                 return 0;
 587         if (!cpk->chain)
 588                 cpk->chain = sk_X509_new_null();
 589         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 590                 return 0;
 591         return 1;
 592         }
 593
 594 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 595         {
 596         if (!ssl_cert_add0_chain_cert(c, x))
 597                 return 0;
 598         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 599         return 1;
 600         }
 601
 602 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 603         {
 604         c->cert_cb = cb;
 605         c->cert_cb_arg = arg;
 606         }
 607
 608 SESS_CERT *ssl_sess_cert_new(void)
 609         {
 610         SESS_CERT *ret;
 611
 612         ret = OPENSSL_malloc(sizeof *ret);
 613         if (ret == NULL)
 614                 {
 615                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 616                 return NULL;
 617                 }
 618
 619         memset(ret, 0 ,sizeof *ret);
 620         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 621         ret->references = 1;
 622
 623         return ret;
 624         }
 625
 626 void ssl_sess_cert_free(SESS_CERT *sc)
 627         {
 628         int i;
 629
 630         if (sc == NULL)
 631                 return;
 632
 633         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 634 #ifdef REF_PRINT
 635         REF_PRINT("SESS_CERT", sc);
 636 #endif
 637         if (i > 0)
 638                 return;
 639 #ifdef REF_CHECK
 640         if (i < 0)
 641                 {
 642                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 643                 abort(); /* ok */
 644                 }
 645 #endif
 646
 647         /* i == 0 */
 648         if (sc->cert_chain != NULL)
 649                 sk_X509_pop_free(sc->cert_chain, X509_free);
 650         for (i = 0; i < SSL_PKEY_NUM; i++)
 651                 {
 652                 if (sc->peer_pkeys[i].x509 != NULL)
 653                         X509_free(sc->peer_pkeys[i].x509);
 654 #if 0 /* We don't have the peer's private key.  These lines are just
 655            * here as a reminder that we're still using a not-quite-appropriate
 656            * data structure. */
 657                 if (sc->peer_pkeys[i].privatekey != NULL)
 658                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 659 #endif
 660                 }
 661
 662 #ifndef OPENSSL_NO_RSA
 663         if (sc->peer_rsa_tmp != NULL)
 664                 RSA_free(sc->peer_rsa_tmp);
 665 #endif
 666 #ifndef OPENSSL_NO_DH
 667         if (sc->peer_dh_tmp != NULL)
 668                 DH_free(sc->peer_dh_tmp);
 669 #endif
 670 #ifndef OPENSSL_NO_ECDH
 671         if (sc->peer_ecdh_tmp != NULL)
 672                 EC_KEY_free(sc->peer_ecdh_tmp);
 673 #endif
 674
 675         OPENSSL_free(sc);
 676         }
 677
 678 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 679         {
 680         sc->peer_cert_type = type;
 681         return(1);
 682         }
 683
 684 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 685         {
 686         X509 *x;
 687         int i;
 688         X509_STORE *verify_store;
 689         X509_STORE_CTX ctx;
 690
 691         if (s->cert->verify_store)
 692                 verify_store = s->cert->verify_store;
 693         else
 694                 verify_store = s->ctx->cert_store;
 695
 696         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 697                 return(0);
 698
 699         x=sk_X509_value(sk,0);
 700         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 701                 {
 702                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 703                 return(0);
 704                 }
 705         /* Set suite B flags if needed */
 706         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 707 #if 0
 708         if (SSL_get_verify_depth(s) >= 0)
 709                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 710 #endif
 711         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 712
 713         /* We need to inherit the verify parameters. These can be determined by
 714          * the context: if its a server it will verify SSL client certificates
 715          * or vice versa.
 716          */
 717
 718         X509_STORE_CTX_set_default(&ctx,
 719                                 s->server ? "ssl_client" : "ssl_server");
 720         /* Anything non-default in "param" should overwrite anything in the
 721          * ctx.
 722          */
 723         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 724
 725         if (s->verify_callback)
 726                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 727
 728         if (s->ctx->app_verify_callback != NULL)
 729 #if 1 /* new with OpenSSL 0.9.7 */
 730                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 731 #else
 732                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 733 #endif
 734         else
 735                 {
 736 #ifndef OPENSSL_NO_X509_VERIFY
 737                 i=X509_verify_cert(&ctx);
 738 #else
 739                 i=0;
 740                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 741                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 742 #endif
 743                 }
 744
 745         s->verify_result=ctx.error;
 746         X509_STORE_CTX_cleanup(&ctx);
 747
 748         return(i);
 749         }
 750
 751 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 752         {
 753         if (*ca_list != NULL)
 754                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 755
 756         *ca_list=name_list;
 757         }
 758
 759 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 760         {
 761         int i;
 762         STACK_OF(X509_NAME) *ret;
 763         X509_NAME *name;
 764
 765         ret=sk_X509_NAME_new_null();
 766         for (i=0; i<sk_X509_NAME_num(sk); i++)
 767                 {
 768                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 769                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 770                         {
 771                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 772                         return(NULL);
 773                         }
 774                 }
 775         return(ret);
 776         }
 777
 778 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 779         {
 780         set_client_CA_list(&(s->client_CA),name_list);
 781         }
 782
 783 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 784         {
 785         set_client_CA_list(&(ctx->client_CA),name_list);
 786         }
 787
 788 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 789         {
 790         return(ctx->client_CA);
 791         }
 792
 793 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 794         {
 795         if (s->type == SSL_ST_CONNECT)
 796                 { /* we are in the client */
 797                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 798                         (s->s3 != NULL))
 799                         return(s->s3->tmp.ca_names);
 800                 else
 801                         return(NULL);
 802                 }
 803         else
 804                 {
 805                 if (s->client_CA != NULL)
 806                         return(s->client_CA);
 807                 else
 808                         return(s->ctx->client_CA);
 809                 }
 810         }
 811
 812 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 813         {
 814         X509_NAME *name;
 815
 816         if (x == NULL) return(0);
 817         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 818                 return(0);
 819
 820         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 821                 return(0);
 822
 823         if (!sk_X509_NAME_push(*sk,name))
 824                 {
 825                 X509_NAME_free(name);
 826                 return(0);
 827                 }
 828         return(1);
 829         }
 830
 831 int SSL_add_client_CA(SSL *ssl,X509 *x)
 832         {
 833         return(add_client_CA(&(ssl->client_CA),x));
 834         }
 835
 836 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 837         {
 838         return(add_client_CA(&(ctx->client_CA),x));
 839         }
 840
 841 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 842         {
 843         return(X509_NAME_cmp(*a,*b));
 844         }
 845
 846 #ifndef OPENSSL_NO_STDIO
 847 /*!
 848  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 849  * it doesn't really have anything to do with clients (except that a common use
 850  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 851  * much to do with CAs, either, since it will load any old cert.
 852  * \param file the file containing one or more certs.
 853  * \return a ::STACK containing the certs.
 854  */
 855 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 856         {
 857         BIO *in;
 858         X509 *x=NULL;
 859         X509_NAME *xn=NULL;
 860         STACK_OF(X509_NAME) *ret = NULL,*sk;
 861
 862         sk=sk_X509_NAME_new(xname_cmp);
 863
 864         in=BIO_new(BIO_s_file_internal());
 865
 866         if ((sk == NULL) || (in == NULL))
 867                 {
 868                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 869                 goto err;
 870                 }
 871
 872         if (!BIO_read_filename(in,file))
 873                 goto err;
 874
 875         for (;;)
 876                 {
 877                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 878                         break;
 879                 if (ret == NULL)
 880                         {
 881                         ret = sk_X509_NAME_new_null();
 882                         if (ret == NULL)
 883                                 {
 884                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 885                                 goto err;
 886                                 }
 887                         }
 888                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 889                 /* check for duplicates */
 890                 xn=X509_NAME_dup(xn);
 891                 if (xn == NULL) goto err;
 892                 if (sk_X509_NAME_find(sk,xn) >= 0)
 893                         X509_NAME_free(xn);
 894                 else
 895                         {
 896                         sk_X509_NAME_push(sk,xn);
 897                         sk_X509_NAME_push(ret,xn);
 898                         }
 899                 }
 900
 901         if (0)
 902                 {
 903 err:
 904                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 905                 ret=NULL;
 906                 }
 907         if (sk != NULL) sk_X509_NAME_free(sk);
 908         if (in != NULL) BIO_free(in);
 909         if (x != NULL) X509_free(x);
 910         if (ret != NULL)
 911                 ERR_clear_error();
 912         return(ret);
 913         }
 914 #endif
 915
 916 /*!
 917  * Add a file of certs to a stack.
 918  * \param stack the stack to add to.
 919  * \param file the file to add from. All certs in this file that are not
 920  * already in the stack will be added.
 921  * \return 1 for success, 0 for failure. Note that in the case of failure some
 922  * certs may have been added to \c stack.
 923  */
 924
 925 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 926                                         const char *file)
 927         {
 928         BIO *in;
 929         X509 *x=NULL;
 930         X509_NAME *xn=NULL;
 931         int ret=1;
 932         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 933
 934         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 935
 936         in=BIO_new(BIO_s_file_internal());
 937
 938         if (in == NULL)
 939                 {
 940                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
 941                 goto err;
 942                 }
 943
 944         if (!BIO_read_filename(in,file))
 945                 goto err;
 946
 947         for (;;)
 948                 {
 949                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 950                         break;
 951                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 952                 xn=X509_NAME_dup(xn);
 953                 if (xn == NULL) goto err;
 954                 if (sk_X509_NAME_find(stack,xn) >= 0)
 955                         X509_NAME_free(xn);
 956                 else
 957                         sk_X509_NAME_push(stack,xn);
 958                 }
 959
 960         ERR_clear_error();
 961
 962         if (0)
 963                 {
 964 err:
 965                 ret=0;
 966                 }
 967         if(in != NULL)
 968                 BIO_free(in);
 969         if(x != NULL)
 970                 X509_free(x);
 971
 972         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 973
 974         return ret;
 975         }
 976
 977 /*!
 978  * Add a directory of certs to a stack.
 979  * \param stack the stack to append to.
 980  * \param dir the directory to append from. All files in this directory will be
 981  * examined as potential certs. Any that are acceptable to
 982  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 983  * included.
 984  * \return 1 for success, 0 for failure. Note that in the case of failure some
 985  * certs may have been added to \c stack.
 986  */
 987
 988 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 989                                        const char *dir)
 990         {
 991         OPENSSL_DIR_CTX *d = NULL;
 992         const char *filename;
 993         int ret = 0;
 994
 995         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
 996
 997         /* Note that a side effect is that the CAs will be sorted by name */
 998
 999         while((filename = OPENSSL_DIR_read(&d, dir)))
1000                 {
1001                 char buf[1024];
1002                 int r;
1003
1004                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1005                         {
1006                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1007                         goto err;
1008                         }
1009
1010 #ifdef OPENSSL_SYS_VMS
1011                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1012 #else
1013                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1014 #endif
1015                 if (r <= 0 || r >= (int)sizeof(buf))
1016                         goto err;
1017                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1018                         goto err;
1019                 }
1020
1021         if (errno)
1022                 {
1023                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1024                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1025                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1026                 goto err;
1027                 }
1028
1029         ret = 1;
1030
1031 err:
1032         if (d) OPENSSL_DIR_end(&d);
1033         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1034         return ret;
1035         }
1036
1037 /* Add a certificate to a BUF_MEM structure */
1038
1039 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1040         {
1041         int n;
1042         unsigned char *p;
1043
1044         n=i2d_X509(x,NULL);
1045         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1046                 {
1047                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1048                 return 0;
1049                 }
1050         p=(unsigned char *)&(buf->data[*l]);
1051         l2n3(n,p);
1052         i2d_X509(x,&p);
1053         *l+=n+3;
1054
1055         return 1;
1056         }
1057
1058 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1059 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1060         {
1061         BUF_MEM *buf = s->init_buf;
1062         int no_chain;
1063         int i;
1064
1065         X509 *x;
1066         STACK_OF(X509) *extra_certs;
1067         X509_STORE *chain_store;
1068
1069         if (cpk)
1070                 x = cpk->x509;
1071         else
1072                 x = NULL;
1073
1074         if (s->cert->chain_store)
1075                 chain_store = s->cert->chain_store;
1076         else
1077                 chain_store = s->ctx->cert_store;
1078
1079         /* If we have a certificate specific chain use it, else use
1080          * parent ctx.
1081          */
1082         if (cpk && cpk->chain)
1083                 extra_certs = cpk->chain;
1084         else
1085                 extra_certs = s->ctx->extra_certs;
1086
1087         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1088                 no_chain = 1;
1089         else
1090                 no_chain = 0;
1091
1092         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1093         if (!BUF_MEM_grow_clean(buf,10))
1094                 {
1095                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1096                 return 0;
1097                 }
1098         if (x != NULL)
1099                 {
1100                 if (no_chain)
1101                         {
1102                         if (!ssl_add_cert_to_buf(buf, l, x))
1103                                 return 0;
1104                         }
1105                 else
1106                         {
1107                         X509_STORE_CTX xs_ctx;
1108
1109                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1110                                 {
1111                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1112                                 return(0);
1113                                 }
1114                         X509_verify_cert(&xs_ctx);
1115                         /* Don't leave errors in the queue */
1116                         ERR_clear_error();
1117                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1118                                 {
1119                                 x = sk_X509_value(xs_ctx.chain, i);
1120
1121                                 if (!ssl_add_cert_to_buf(buf, l, x))
1122                                         {
1123                                         X509_STORE_CTX_cleanup(&xs_ctx);
1124                                         return 0;
1125                                         }
1126                                 }
1127                         X509_STORE_CTX_cleanup(&xs_ctx);
1128                         }
1129                 }
1130         for (i=0; i<sk_X509_num(extra_certs); i++)
1131                 {
1132                 x=sk_X509_value(extra_certs,i);
1133                 if (!ssl_add_cert_to_buf(buf, l, x))
1134                         return 0;
1135                 }
1136
1137         return 1;
1138         }
1139
1140 /* Build a certificate chain for current certificate */
1141 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1142         {
1143         CERT_PKEY *cpk = c->key;
1144         X509_STORE_CTX xs_ctx;
1145         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1146         X509 *x;
1147         int i;
1148
1149         if (!cpk->x509)
1150                 {
1151                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1152                 return 0;
1153                 }
1154
1155         if (c->chain_store)
1156                 chain_store = c->chain_store;
1157
1158         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1159                 untrusted = cpk->chain;
1160
1161         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1162                 {
1163                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1164                 return 0;
1165                 }
1166         /* Set suite B flags if needed */
1167         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1168
1169         i = X509_verify_cert(&xs_ctx);
1170         if (i > 0)
1171                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1172         X509_STORE_CTX_cleanup(&xs_ctx);
1173         if (i <= 0)
1174                 {
1175                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1176                 return 0;
1177                 }
1178         if (cpk->chain)
1179                 sk_X509_pop_free(cpk->chain, X509_free);
1180         /* Remove EE certificate from chain */
1181         x = sk_X509_shift(chain);
1182         X509_free(x);
1183         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1184                 {
1185                 x = sk_X509_pop(chain);
1186                 X509_free(x);
1187                 }
1188         cpk->chain = chain;
1189
1190         return 1;
1191         }
1192
1193 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1194         {
1195         X509_STORE **pstore;
1196         if (chain)
1197                 pstore = &c->chain_store;
1198         else
1199                 pstore = &c->verify_store;
1200         if (*pstore)
1201                 X509_STORE_free(*pstore);
1202         *pstore = store;
1203         if (ref && store)
1204                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1205         return 1;
1206         }
1207