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