ssl/ssl_cert.c

   1 /*! \file ssl/ssl_cert.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 #include <stdio.h>
 118
 119 #include "e_os.h"
 120 #ifndef NO_SYS_TYPES_H
 121 # include <sys/types.h>
 122 #endif
 123
 124 #include "o_dir.h"
 125 #include <openssl/objects.h>
 126 #include <openssl/bio.h>
 127 #include <openssl/pem.h>
 128 #include <openssl/x509v3.h>
 129 #ifndef OPENSSL_NO_DH
 130 #include <openssl/dh.h>
 131 #endif
 132 #include <openssl/bn.h>
 133 #include "ssl_locl.h"
 134
 135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
 136         {
 137         static volatile int ssl_x509_store_ctx_idx= -1;
 138         int got_write_lock = 0;
 139
 140         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 141
 142         if (ssl_x509_store_ctx_idx < 0)
 143                 {
 144                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 145                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 146                 got_write_lock = 1;
 147
 148                 if (ssl_x509_store_ctx_idx < 0)
 149                         {
 150                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 151                                 0,"SSL for verify callback",NULL,NULL,NULL);
 152                         }
 153                 }
 154
 155         if (got_write_lock)
 156                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 157         else
 158                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 159
 160         return ssl_x509_store_ctx_idx;
 161         }
 162
 163 void ssl_cert_set_default_md(CERT *cert)
 164         {
 165         /* Set digest values to defaults */
 166 #ifndef OPENSSL_NO_DSA
 167         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
 168 #endif
 169 #ifndef OPENSSL_NO_RSA
 170         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
 171         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
 172 #endif
 173 #ifndef OPENSSL_NO_ECDSA
 174         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
 175 #endif
 176         }
 177
 178 CERT *ssl_cert_new(void)
 179         {
 180         CERT *ret;
 181
 182         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
 183         if (ret == NULL)
 184                 {
 185                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
 186                 return(NULL);
 187                 }
 188         memset(ret,0,sizeof(CERT));
 189
 190         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
 191         ret->references=1;
 192         ssl_cert_set_default_md(ret);
 193         return(ret);
 194         }
 195
 196 CERT *ssl_cert_dup(CERT *cert)
 197         {
 198         CERT *ret;
 199         int i;
 200
 201         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
 202         if (ret == NULL)
 203                 {
 204                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 205                 return(NULL);
 206                 }
 207
 208         memset(ret, 0, sizeof(CERT));
 209
 210         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
 211         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
 212          * if you find that more readable */
 213
 214         ret->valid = cert->valid;
 215         ret->mask_k = cert->mask_k;
 216         ret->mask_a = cert->mask_a;
 217         ret->export_mask_k = cert->export_mask_k;
 218         ret->export_mask_a = cert->export_mask_a;
 219
 220 #ifndef OPENSSL_NO_RSA
 221         if (cert->rsa_tmp != NULL)
 222                 {
 223                 RSA_up_ref(cert->rsa_tmp);
 224                 ret->rsa_tmp = cert->rsa_tmp;
 225                 }
 226         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 227 #endif
 228
 229 #ifndef OPENSSL_NO_DH
 230         if (cert->dh_tmp != NULL)
 231                 {
 232                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
 233                 if (ret->dh_tmp == NULL)
 234                         {
 235                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
 236                         goto err;
 237                         }
 238                 if (cert->dh_tmp->priv_key)
 239                         {
 240                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
 241                         if (!b)
 242                                 {
 243                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 244                                 goto err;
 245                                 }
 246                         ret->dh_tmp->priv_key = b;
 247                         }
 248                 if (cert->dh_tmp->pub_key)
 249                         {
 250                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
 251                         if (!b)
 252                                 {
 253                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 254                                 goto err;
 255                                 }
 256                         ret->dh_tmp->pub_key = b;
 257                         }
 258                 }
 259         ret->dh_tmp_cb = cert->dh_tmp_cb;
 260 #endif
 261
 262 #ifndef OPENSSL_NO_ECDH
 263         if (cert->ecdh_tmp)
 264                 {
 265                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 266                 if (ret->ecdh_tmp == NULL)
 267                         {
 268                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 269                         goto err;
 270                         }
 271                 }
 272         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 273         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 274 #endif
 275
 276         for (i = 0; i < SSL_PKEY_NUM; i++)
 277                 {
 278                 CERT_PKEY *cpk = cert->pkeys + i;
 279                 CERT_PKEY *rpk = ret->pkeys + i;
 280                 if (cpk->x509 != NULL)
 281                         {
 282                         rpk->x509 = cpk->x509;
 283                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 284                         }
 285
 286                 if (cpk->privatekey != NULL)
 287                         {
 288                         rpk->privatekey = cpk->privatekey;
 289                         CRYPTO_add(&cpk->privatekey->references, 1,
 290                                 CRYPTO_LOCK_EVP_PKEY);
 291
 292                         switch(i)
 293                                 {
 294                                 /* If there was anything special to do for
 295                                  * certain types of keys, we'd do it here.
 296                                  * (Nothing at the moment, I think.) */
 297
 298                         case SSL_PKEY_RSA_ENC:
 299                         case SSL_PKEY_RSA_SIGN:
 300                                 /* We have an RSA key. */
 301                                 break;
 302
 303                         case SSL_PKEY_DSA_SIGN:
 304                                 /* We have a DSA key. */
 305                                 break;
 306
 307                         case SSL_PKEY_DH_RSA:
 308                         case SSL_PKEY_DH_DSA:
 309                                 /* We have a DH key. */
 310                                 break;
 311
 312                         case SSL_PKEY_ECC:
 313                                 /* We have an ECC key */
 314                                 break;
 315
 316                         default:
 317                                 /* Can't happen. */
 318                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 319                                 }
 320                         }
 321
 322                 if (cpk->chain)
 323                         {
 324                         int j;
 325                         rpk->chain = sk_X509_dup(cpk->chain);
 326                         if (!rpk->chain)
 327                                 {
 328                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 329                                 goto err;
 330                                 }
 331                         for (j = 0; j < sk_X509_num(rpk->chain); j++)
 332                                 {
 333                                 X509 *x = sk_X509_value(rpk->chain, j);
 334                                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 335                                 }
 336                         }
 337                 rpk->valid_flags = 0;
 338                 if (cert->pkeys[i].authz != NULL)
 339                         {
 340                         /* Just copy everything. */
 341                         ret->pkeys[i].authz_length =
 342                                 cert->pkeys[i].authz_length;
 343                         ret->pkeys[i].authz =
 344                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
 345                         if (ret->pkeys[i].authz == NULL)
 346                                 {
 347                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 348                                 return(NULL);
 349                                 }
 350                         memcpy(ret->pkeys[i].authz,
 351                                cert->pkeys[i].authz,
 352                                cert->pkeys[i].authz_length);
 353                         }
 354                 }
 355
 356         ret->references=1;
 357         /* Set digests to defaults. NB: we don't copy existing values as they
 358          * will be set during handshake.
 359          */
 360         ssl_cert_set_default_md(ret);
 361         /* Peer sigalgs set to NULL as we get these from handshake too */
 362         ret->peer_sigalgs = NULL;
 363         ret->peer_sigalgslen = 0;
 364         /* Configured sigalgs however we copy across */
 365
 366         if (cert->conf_sigalgs)
 367                 {
 368                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 369                 if (!ret->conf_sigalgs)
 370                         goto err;
 371                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 372                                                 cert->conf_sigalgslen);
 373                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 374                 }
 375         else
 376                 ret->conf_sigalgs = NULL;
 377
 378         if (cert->client_sigalgs)
 379                 {
 380                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 381                 if (!ret->client_sigalgs)
 382                         goto err;
 383                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 384                                                 cert->client_sigalgslen);
 385                 ret->client_sigalgslen = cert->client_sigalgslen;
 386                 }
 387         else
 388                 ret->client_sigalgs = NULL;
 389         /* Shared sigalgs also NULL */
 390         ret->shared_sigalgs = NULL;
 391         /* Copy any custom client certificate types */
 392         if (cert->ctypes)
 393                 {
 394                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 395                 if (!ret->ctypes)
 396                         goto err;
 397                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 398                 ret->ctype_num = cert->ctype_num;
 399                 }
 400
 401         ret->cert_flags = cert->cert_flags;
 402
 403         ret->cert_cb = cert->cert_cb;
 404         ret->cert_cb_arg = cert->cert_cb_arg;
 405
 406         return(ret);
 407
 408 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 409 err:
 410 #endif
 411 #ifndef OPENSSL_NO_RSA
 412         if (ret->rsa_tmp != NULL)
 413                 RSA_free(ret->rsa_tmp);
 414 #endif
 415 #ifndef OPENSSL_NO_DH
 416         if (ret->dh_tmp != NULL)
 417                 DH_free(ret->dh_tmp);
 418 #endif
 419 #ifndef OPENSSL_NO_ECDH
 420         if (ret->ecdh_tmp != NULL)
 421                 EC_KEY_free(ret->ecdh_tmp);
 422 #endif
 423
 424         ssl_cert_clear_certs(ret);
 425
 426         return NULL;
 427         }
 428
 429 /* Free up and clear all certificates and chains */
 430
 431 void ssl_cert_clear_certs(CERT *c)
 432         {
 433         int i;
 434         if (c == NULL)
 435                 return;
 436         for (i = 0; i<SSL_PKEY_NUM; i++)
 437                 {
 438                 CERT_PKEY *cpk = c->pkeys + i;
 439                 if (cpk->x509)
 440                         {
 441                         X509_free(cpk->x509);
 442                         cpk->x509 = NULL;
 443                         }
 444                 if (cpk->privatekey)
 445                         {
 446                         EVP_PKEY_free(cpk->privatekey);
 447                         cpk->privatekey = NULL;
 448                         }
 449                 if (cpk->chain)
 450                         {
 451                         sk_X509_pop_free(cpk->chain, X509_free);
 452                         cpk->chain = NULL;
 453                         }
 454 #ifndef OPENSSL_NO_TLSEXT
 455                 if (cpk->authz != NULL)
 456                         OPENSSL_free(cpk->authz);
 457 #endif
 458                 cpk->valid_flags = 0;
 459                 }
 460         }
 461
 462 void ssl_cert_free(CERT *c)
 463         {
 464         int i;
 465
 466         if(c == NULL)
 467             return;
 468
 469         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 470 #ifdef REF_PRINT
 471         REF_PRINT("CERT",c);
 472 #endif
 473         if (i > 0) return;
 474 #ifdef REF_CHECK
 475         if (i < 0)
 476                 {
 477                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 478                 abort(); /* ok */
 479                 }
 480 #endif
 481
 482 #ifndef OPENSSL_NO_RSA
 483         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 484 #endif
 485 #ifndef OPENSSL_NO_DH
 486         if (c->dh_tmp) DH_free(c->dh_tmp);
 487 #endif
 488 #ifndef OPENSSL_NO_ECDH
 489         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 490 #endif
 491
 492         ssl_cert_clear_certs(c);
 493         if (c->peer_sigalgs)
 494                 OPENSSL_free(c->peer_sigalgs);
 495         if (c->conf_sigalgs)
 496                 OPENSSL_free(c->conf_sigalgs);
 497         if (c->client_sigalgs)
 498                 OPENSSL_free(c->client_sigalgs);
 499         if (c->shared_sigalgs)
 500                 OPENSSL_free(c->shared_sigalgs);
 501         if (c->ctypes)
 502                 OPENSSL_free(c->ctypes);
 503         OPENSSL_free(c);
 504         }
 505
 506 int ssl_cert_inst(CERT **o)
 507         {
 508         /* Create a CERT if there isn't already one
 509          * (which cannot really happen, as it is initially created in
 510          * SSL_CTX_new; but the earlier code usually allows for that one
 511          * being non-existant, so we follow that behaviour, as it might
 512          * turn out that there actually is a reason for it -- but I'm
 513          * not sure that *all* of the existing code could cope with
 514          * s->cert being NULL, otherwise we could do without the
 515          * initialization in SSL_CTX_new).
 516          */
 517
 518         if (o == NULL)
 519                 {
 520                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 521                 return(0);
 522                 }
 523         if (*o == NULL)
 524                 {
 525                 if ((*o = ssl_cert_new()) == NULL)
 526                         {
 527                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 528                         return(0);
 529                         }
 530                 }
 531         return(1);
 532         }
 533
 534 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 535         {
 536         CERT_PKEY *cpk = c->key;
 537         if (!cpk)
 538                 return 0;
 539         if (cpk->chain)
 540                 sk_X509_pop_free(cpk->chain, X509_free);
 541         cpk->chain = chain;
 542         return 1;
 543         }
 544
 545 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 546         {
 547         STACK_OF(X509) *dchain;
 548         X509 *x;
 549         int i;
 550         if (!chain)
 551                 return ssl_cert_set0_chain(c, NULL);
 552         dchain = sk_X509_dup(chain);
 553         if (!dchain)
 554                 return 0;
 555         for (i = 0; i < sk_X509_num(dchain); i++)
 556                 {
 557                 x = sk_X509_value(dchain, i);
 558                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 559                 }
 560         if (!ssl_cert_set0_chain(c, dchain))
 561                 {
 562                 sk_X509_pop_free(dchain, X509_free);
 563                 return 0;
 564                 }
 565         return 1;
 566         }
 567
 568 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 569         {
 570         CERT_PKEY *cpk = c->key;
 571         if (!cpk)
 572                 return 0;
 573         if (!cpk->chain)
 574                 cpk->chain = sk_X509_new_null();
 575         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 576                 return 0;
 577         return 1;
 578         }
 579
 580 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 581         {
 582         if (!ssl_cert_add0_chain_cert(c, x))
 583                 return 0;
 584         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 585         return 1;
 586         }
 587
 588 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 589         {
 590         c->cert_cb = cb;
 591         c->cert_cb_arg = arg;
 592         }
 593
 594 SESS_CERT *ssl_sess_cert_new(void)
 595         {
 596         SESS_CERT *ret;
 597
 598         ret = OPENSSL_malloc(sizeof *ret);
 599         if (ret == NULL)
 600                 {
 601                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 602                 return NULL;
 603                 }
 604
 605         memset(ret, 0 ,sizeof *ret);
 606         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 607         ret->references = 1;
 608
 609         return ret;
 610         }
 611
 612 void ssl_sess_cert_free(SESS_CERT *sc)
 613         {
 614         int i;
 615
 616         if (sc == NULL)
 617                 return;
 618
 619         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 620 #ifdef REF_PRINT
 621         REF_PRINT("SESS_CERT", sc);
 622 #endif
 623         if (i > 0)
 624                 return;
 625 #ifdef REF_CHECK
 626         if (i < 0)
 627                 {
 628                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 629                 abort(); /* ok */
 630                 }
 631 #endif
 632
 633         /* i == 0 */
 634         if (sc->cert_chain != NULL)
 635                 sk_X509_pop_free(sc->cert_chain, X509_free);
 636         for (i = 0; i < SSL_PKEY_NUM; i++)
 637                 {
 638                 if (sc->peer_pkeys[i].x509 != NULL)
 639                         X509_free(sc->peer_pkeys[i].x509);
 640 #if 0 /* We don't have the peer's private key.  These lines are just
 641            * here as a reminder that we're still using a not-quite-appropriate
 642            * data structure. */
 643                 if (sc->peer_pkeys[i].privatekey != NULL)
 644                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 645 #endif
 646                 }
 647
 648 #ifndef OPENSSL_NO_RSA
 649         if (sc->peer_rsa_tmp != NULL)
 650                 RSA_free(sc->peer_rsa_tmp);
 651 #endif
 652 #ifndef OPENSSL_NO_DH
 653         if (sc->peer_dh_tmp != NULL)
 654                 DH_free(sc->peer_dh_tmp);
 655 #endif
 656 #ifndef OPENSSL_NO_ECDH
 657         if (sc->peer_ecdh_tmp != NULL)
 658                 EC_KEY_free(sc->peer_ecdh_tmp);
 659 #endif
 660
 661         OPENSSL_free(sc);
 662         }
 663
 664 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 665         {
 666         sc->peer_cert_type = type;
 667         return(1);
 668         }
 669
 670 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 671         {
 672         X509 *x;
 673         int i;
 674         X509_STORE_CTX ctx;
 675
 676         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 677                 return(0);
 678
 679         x=sk_X509_value(sk,0);
 680         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
 681                 {
 682                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 683                 return(0);
 684                 }
 685 #if 0
 686         if (SSL_get_verify_depth(s) >= 0)
 687                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 688 #endif
 689         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 690
 691         /* We need to inherit the verify parameters. These can be determined by
 692          * the context: if its a server it will verify SSL client certificates
 693          * or vice versa.
 694          */
 695
 696         X509_STORE_CTX_set_default(&ctx,
 697                                 s->server ? "ssl_client" : "ssl_server");
 698         /* Anything non-default in "param" should overwrite anything in the
 699          * ctx.
 700          */
 701         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 702
 703         if (s->verify_callback)
 704                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 705
 706         if (s->ctx->app_verify_callback != NULL)
 707 #if 1 /* new with OpenSSL 0.9.7 */
 708                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 709 #else
 710                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 711 #endif
 712         else
 713                 {
 714 #ifndef OPENSSL_NO_X509_VERIFY
 715                 i=X509_verify_cert(&ctx);
 716 #else
 717                 i=0;
 718                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 719                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 720 #endif
 721                 }
 722
 723         s->verify_result=ctx.error;
 724         X509_STORE_CTX_cleanup(&ctx);
 725
 726         return(i);
 727         }
 728
 729 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 730         {
 731         if (*ca_list != NULL)
 732                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 733
 734         *ca_list=name_list;
 735         }
 736
 737 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 738         {
 739         int i;
 740         STACK_OF(X509_NAME) *ret;
 741         X509_NAME *name;
 742
 743         ret=sk_X509_NAME_new_null();
 744         for (i=0; i<sk_X509_NAME_num(sk); i++)
 745                 {
 746                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 747                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 748                         {
 749                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 750                         return(NULL);
 751                         }
 752                 }
 753         return(ret);
 754         }
 755
 756 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 757         {
 758         set_client_CA_list(&(s->client_CA),name_list);
 759         }
 760
 761 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 762         {
 763         set_client_CA_list(&(ctx->client_CA),name_list);
 764         }
 765
 766 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 767         {
 768         return(ctx->client_CA);
 769         }
 770
 771 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 772         {
 773         if (s->type == SSL_ST_CONNECT)
 774                 { /* we are in the client */
 775                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 776                         (s->s3 != NULL))
 777                         return(s->s3->tmp.ca_names);
 778                 else
 779                         return(NULL);
 780                 }
 781         else
 782                 {
 783                 if (s->client_CA != NULL)
 784                         return(s->client_CA);
 785                 else
 786                         return(s->ctx->client_CA);
 787                 }
 788         }
 789
 790 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 791         {
 792         X509_NAME *name;
 793
 794         if (x == NULL) return(0);
 795         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 796                 return(0);
 797
 798         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 799                 return(0);
 800
 801         if (!sk_X509_NAME_push(*sk,name))
 802                 {
 803                 X509_NAME_free(name);
 804                 return(0);
 805                 }
 806         return(1);
 807         }
 808
 809 int SSL_add_client_CA(SSL *ssl,X509 *x)
 810         {
 811         return(add_client_CA(&(ssl->client_CA),x));
 812         }
 813
 814 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 815         {
 816         return(add_client_CA(&(ctx->client_CA),x));
 817         }
 818
 819 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 820         {
 821         return(X509_NAME_cmp(*a,*b));
 822         }
 823
 824 #ifndef OPENSSL_NO_STDIO
 825 /*!
 826  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 827  * it doesn't really have anything to do with clients (except that a common use
 828  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 829  * much to do with CAs, either, since it will load any old cert.
 830  * \param file the file containing one or more certs.
 831  * \return a ::STACK containing the certs.
 832  */
 833 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 834         {
 835         BIO *in;
 836         X509 *x=NULL;
 837         X509_NAME *xn=NULL;
 838         STACK_OF(X509_NAME) *ret = NULL,*sk;
 839
 840         sk=sk_X509_NAME_new(xname_cmp);
 841
 842         in=BIO_new(BIO_s_file_internal());
 843
 844         if ((sk == NULL) || (in == NULL))
 845                 {
 846                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 847                 goto err;
 848                 }
 849
 850         if (!BIO_read_filename(in,file))
 851                 goto err;
 852
 853         for (;;)
 854                 {
 855                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 856                         break;
 857                 if (ret == NULL)
 858                         {
 859                         ret = sk_X509_NAME_new_null();
 860                         if (ret == NULL)
 861                                 {
 862                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 863                                 goto err;
 864                                 }
 865                         }
 866                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 867                 /* check for duplicates */
 868                 xn=X509_NAME_dup(xn);
 869                 if (xn == NULL) goto err;
 870                 if (sk_X509_NAME_find(sk,xn) >= 0)
 871                         X509_NAME_free(xn);
 872                 else
 873                         {
 874                         sk_X509_NAME_push(sk,xn);
 875                         sk_X509_NAME_push(ret,xn);
 876                         }
 877                 }
 878
 879         if (0)
 880                 {
 881 err:
 882                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 883                 ret=NULL;
 884                 }
 885         if (sk != NULL) sk_X509_NAME_free(sk);
 886         if (in != NULL) BIO_free(in);
 887         if (x != NULL) X509_free(x);
 888         if (ret != NULL)
 889                 ERR_clear_error();
 890         return(ret);
 891         }
 892 #endif
 893
 894 /*!
 895  * Add a file of certs to a stack.
 896  * \param stack the stack to add to.
 897  * \param file the file to add from. All certs in this file that are not
 898  * already in the stack will be added.
 899  * \return 1 for success, 0 for failure. Note that in the case of failure some
 900  * certs may have been added to \c stack.
 901  */
 902
 903 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 904                                         const char *file)
 905         {
 906         BIO *in;
 907         X509 *x=NULL;
 908         X509_NAME *xn=NULL;
 909         int ret=1;
 910         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 911
 912         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 913
 914         in=BIO_new(BIO_s_file_internal());
 915
 916         if (in == NULL)
 917                 {
 918                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
 919                 goto err;
 920                 }
 921
 922         if (!BIO_read_filename(in,file))
 923                 goto err;
 924
 925         for (;;)
 926                 {
 927                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 928                         break;
 929                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 930                 xn=X509_NAME_dup(xn);
 931                 if (xn == NULL) goto err;
 932                 if (sk_X509_NAME_find(stack,xn) >= 0)
 933                         X509_NAME_free(xn);
 934                 else
 935                         sk_X509_NAME_push(stack,xn);
 936                 }
 937
 938         ERR_clear_error();
 939
 940         if (0)
 941                 {
 942 err:
 943                 ret=0;
 944                 }
 945         if(in != NULL)
 946                 BIO_free(in);
 947         if(x != NULL)
 948                 X509_free(x);
 949
 950         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 951
 952         return ret;
 953         }
 954
 955 /*!
 956  * Add a directory of certs to a stack.
 957  * \param stack the stack to append to.
 958  * \param dir the directory to append from. All files in this directory will be
 959  * examined as potential certs. Any that are acceptable to
 960  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 961  * included.
 962  * \return 1 for success, 0 for failure. Note that in the case of failure some
 963  * certs may have been added to \c stack.
 964  */
 965
 966 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 967                                        const char *dir)
 968         {
 969         OPENSSL_DIR_CTX *d = NULL;
 970         const char *filename;
 971         int ret = 0;
 972
 973         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
 974
 975         /* Note that a side effect is that the CAs will be sorted by name */
 976
 977         while((filename = OPENSSL_DIR_read(&d, dir)))
 978                 {
 979                 char buf[1024];
 980                 int r;
 981
 982                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
 983                         {
 984                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
 985                         goto err;
 986                         }
 987
 988 #ifdef OPENSSL_SYS_VMS
 989                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
 990 #else
 991                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
 992 #endif
 993                 if (r <= 0 || r >= (int)sizeof(buf))
 994                         goto err;
 995                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
 996                         goto err;
 997                 }
 998
 999         if (errno)
1000                 {
1001                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1002                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1003                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1004                 goto err;
1005                 }
1006
1007         ret = 1;
1008
1009 err:
1010         if (d) OPENSSL_DIR_end(&d);
1011         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1012         return ret;
1013         }
1014
1015 /* Add a certificate to a BUF_MEM structure */
1016
1017 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1018         {
1019         int n;
1020         unsigned char *p;
1021
1022         n=i2d_X509(x,NULL);
1023         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1024                 {
1025                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1026                 return 0;
1027                 }
1028         p=(unsigned char *)&(buf->data[*l]);
1029         l2n3(n,p);
1030         i2d_X509(x,&p);
1031         *l+=n+3;
1032
1033         return 1;
1034         }
1035
1036 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1037 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1038         {
1039         BUF_MEM *buf = s->init_buf;
1040         int no_chain;
1041         int i;
1042
1043         X509 *x;
1044         STACK_OF(X509) *extra_certs;
1045
1046         if (cpk)
1047                 x = cpk->x509;
1048         else
1049                 x = NULL;
1050
1051         /* If we have a certificate specific chain use it, else use
1052          * parent ctx.
1053          */
1054         if (cpk && cpk->chain)
1055                 extra_certs = cpk->chain;
1056         else
1057                 extra_certs = s->ctx->extra_certs;
1058
1059         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1060                 no_chain = 1;
1061         else
1062                 no_chain = 0;
1063
1064         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1065         if (!BUF_MEM_grow_clean(buf,10))
1066                 {
1067                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1068                 return 0;
1069                 }
1070         if (x != NULL)
1071                 {
1072                 if (no_chain)
1073                         {
1074                         if (!ssl_add_cert_to_buf(buf, l, x))
1075                                 return 0;
1076                         }
1077                 else
1078                         {
1079                         X509_STORE_CTX xs_ctx;
1080
1081                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
1082                                 {
1083                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1084                                 return(0);
1085                                 }
1086                         X509_verify_cert(&xs_ctx);
1087                         /* Don't leave errors in the queue */
1088                         ERR_clear_error();
1089                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1090                                 {
1091                                 x = sk_X509_value(xs_ctx.chain, i);
1092
1093                                 if (!ssl_add_cert_to_buf(buf, l, x))
1094                                         {
1095                                         X509_STORE_CTX_cleanup(&xs_ctx);
1096                                         return 0;
1097                                         }
1098                                 }
1099                         X509_STORE_CTX_cleanup(&xs_ctx);
1100                         }
1101                 }
1102         for (i=0; i<sk_X509_num(extra_certs); i++)
1103                 {
1104                 x=sk_X509_value(extra_certs,i);
1105                 if (!ssl_add_cert_to_buf(buf, l, x))
1106                         return 0;
1107                 }
1108
1109         return 1;
1110         }
1111