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