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 static 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 #endif
 274 
 275         for (i = 0; i < SSL_PKEY_NUM; i++)
 276                 {
 277                 if (cert->pkeys[i].x509 != NULL)
 278                         {
 279                         ret->pkeys[i].x509 = cert->pkeys[i].x509;
 280                         CRYPTO_add(&ret->pkeys[i].x509->references, 1,
 281                                 CRYPTO_LOCK_X509);
 282                         }
 283 
 284                 if (cert->pkeys[i].privatekey != NULL)
 285                         {
 286                         ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
 287                         CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
 288                                 CRYPTO_LOCK_EVP_PKEY);
 289 
 290                         switch(i)
 291                                 {
 292                                 /* If there was anything special to do for
 293                                  * certain types of keys, we'd do it here.
 294                                  * (Nothing at the moment, I think.) */
 295 
 296                         case SSL_PKEY_RSA_ENC:
 297                         case SSL_PKEY_RSA_SIGN:
 298                                 /* We have an RSA key. */
 299                                 break;
 300 
 301                         case SSL_PKEY_DSA_SIGN:
 302                                 /* We have a DSA key. */
 303                                 break;
 304 
 305                         case SSL_PKEY_DH_RSA:
 306                         case SSL_PKEY_DH_DSA:
 307                                 /* We have a DH key. */
 308                                 break;
 309 
 310                         case SSL_PKEY_ECC:
 311                                 /* We have an ECC key */
 312                                 break;
 313 
 314                         default:
 315                                 /* Can't happen. */
 316                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 317                                 }
 318                         }
 319                 }
 320 
 321         /* ret->extra_certs *should* exist, but currently the own certificate
 322          * chain is held inside SSL_CTX */
 323 
 324         ret->references=1;
 325         /* Set digests to defaults. NB: we don't copy existing values as they
 326          * will be set during handshake.
 327          */
 328         ssl_cert_set_default_md(ret);
 329 
 330         return(ret);
 331 
 332 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 333 err:
 334 #endif
 335 #ifndef OPENSSL_NO_RSA
 336         if (ret->rsa_tmp != NULL)
 337                 RSA_free(ret->rsa_tmp);
 338 #endif
 339 #ifndef OPENSSL_NO_DH
 340         if (ret->dh_tmp != NULL)
 341                 DH_free(ret->dh_tmp);
 342 #endif
 343 #ifndef OPENSSL_NO_ECDH
 344         if (ret->ecdh_tmp != NULL)
 345                 EC_KEY_free(ret->ecdh_tmp);
 346 #endif
 347 
 348         for (i = 0; i < SSL_PKEY_NUM; i++)
 349                 {
 350                 if (ret->pkeys[i].x509 != NULL)
 351                         X509_free(ret->pkeys[i].x509);
 352                 if (ret->pkeys[i].privatekey != NULL)
 353                         EVP_PKEY_free(ret->pkeys[i].privatekey);
 354                 }
 355 
 356         return NULL;
 357         }
 358 
 359 
 360 void ssl_cert_free(CERT *c)
 361         {
 362         int i;
 363 
 364         if(c == NULL)
 365             return;
 366 
 367         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 368 #ifdef REF_PRINT
 369         REF_PRINT("CERT",c);
 370 #endif
 371         if (i > 0) return;
 372 #ifdef REF_CHECK
 373         if (i < 0)
 374                 {
 375                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 376                 abort(); /* ok */
 377                 }
 378 #endif
 379 
 380 #ifndef OPENSSL_NO_RSA
 381         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 382 #endif
 383 #ifndef OPENSSL_NO_DH
 384         if (c->dh_tmp) DH_free(c->dh_tmp);
 385 #endif
 386 #ifndef OPENSSL_NO_ECDH
 387         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 388 #endif
 389 
 390         for (i=0; i<SSL_PKEY_NUM; i++)
 391                 {
 392                 if (c->pkeys[i].x509 != NULL)
 393                         X509_free(c->pkeys[i].x509);
 394                 if (c->pkeys[i].privatekey != NULL)
 395                         EVP_PKEY_free(c->pkeys[i].privatekey);
 396 #if 0
 397                 if (c->pkeys[i].publickey != NULL)
 398                         EVP_PKEY_free(c->pkeys[i].publickey);
 399 #endif
 400                 }
 401         OPENSSL_free(c);
 402         }
 403 
 404 int ssl_cert_inst(CERT **o)
 405         {
 406         /* Create a CERT if there isn't already one
 407          * (which cannot really happen, as it is initially created in
 408          * SSL_CTX_new; but the earlier code usually allows for that one
 409          * being non-existant, so we follow that behaviour, as it might
 410          * turn out that there actually is a reason for it -- but I'm
 411          * not sure that *all* of the existing code could cope with
 412          * s->cert being NULL, otherwise we could do without the
 413          * initialization in SSL_CTX_new).
 414          */
 415 
 416         if (o == NULL)
 417                 {
 418                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 419                 return(0);
 420                 }
 421         if (*o == NULL)
 422                 {
 423                 if ((*o = ssl_cert_new()) == NULL)
 424                         {
 425                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 426                         return(0);
 427                         }
 428                 }
 429         return(1);
 430         }
 431 
 432 
 433 SESS_CERT *ssl_sess_cert_new(void)
 434         {
 435         SESS_CERT *ret;
 436 
 437         ret = OPENSSL_malloc(sizeof *ret);
 438         if (ret == NULL)
 439                 {
 440                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 441                 return NULL;
 442                 }
 443 
 444         memset(ret, 0 ,sizeof *ret);
 445         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 446         ret->references = 1;
 447 
 448         return ret;
 449         }
 450 
 451 void ssl_sess_cert_free(SESS_CERT *sc)
 452         {
 453         int i;
 454 
 455         if (sc == NULL)
 456                 return;
 457 
 458         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 459 #ifdef REF_PRINT
 460         REF_PRINT("SESS_CERT", sc);
 461 #endif
 462         if (i > 0)
 463                 return;
 464 #ifdef REF_CHECK
 465         if (i < 0)
 466                 {
 467                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 468                 abort(); /* ok */
 469                 }
 470 #endif
 471 
 472         /* i == 0 */
 473         if (sc->cert_chain != NULL)
 474                 sk_X509_pop_free(sc->cert_chain, X509_free);
 475         for (i = 0; i < SSL_PKEY_NUM; i++)
 476                 {
 477                 if (sc->peer_pkeys[i].x509 != NULL)
 478                         X509_free(sc->peer_pkeys[i].x509);
 479 #if 0 /* We don't have the peer's private key.  These lines are just
 480            * here as a reminder that we're still using a not-quite-appropriate
 481            * data structure. */
 482                 if (sc->peer_pkeys[i].privatekey != NULL)
 483                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 484 #endif
 485                 }
 486 
 487 #ifndef OPENSSL_NO_RSA
 488         if (sc->peer_rsa_tmp != NULL)
 489                 RSA_free(sc->peer_rsa_tmp);
 490 #endif
 491 #ifndef OPENSSL_NO_DH
 492         if (sc->peer_dh_tmp != NULL)
 493                 DH_free(sc->peer_dh_tmp);
 494 #endif
 495 #ifndef OPENSSL_NO_ECDH
 496         if (sc->peer_ecdh_tmp != NULL)
 497                 EC_KEY_free(sc->peer_ecdh_tmp);
 498 #endif
 499 
 500         OPENSSL_free(sc);
 501         }
 502 
 503 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 504         {
 505         sc->peer_cert_type = type;
 506         return(1);
 507         }
 508 
 509 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 510         {
 511         X509 *x;
 512         int i;
 513         X509_STORE_CTX ctx;
 514 
 515         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 516                 return(0);
 517 
 518         x=sk_X509_value(sk,0);
 519         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
 520                 {
 521                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 522                 return(0);
 523                 }
 524 #if 0
 525         if (SSL_get_verify_depth(s) >= 0)
 526                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 527 #endif
 528         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 529 
 530         /* We need to inherit the verify parameters. These can be determined by
 531          * the context: if its a server it will verify SSL client certificates
 532          * or vice versa.
 533          */
 534 
 535         X509_STORE_CTX_set_default(&ctx,
 536                                 s->server ? "ssl_client" : "ssl_server");
 537         /* Anything non-default in "param" should overwrite anything in the
 538          * ctx.
 539          */
 540         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 541 
 542         if (s->verify_callback)
 543                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 544 
 545         if (s->ctx->app_verify_callback != NULL)
 546 #if 1 /* new with OpenSSL 0.9.7 */
 547                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 548 #else
 549                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 550 #endif
 551         else
 552                 {
 553 #ifndef OPENSSL_NO_X509_VERIFY
 554                 i=X509_verify_cert(&ctx);
 555 #else
 556                 i=0;
 557                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 558                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 559 #endif
 560                 }
 561 
 562         s->verify_result=ctx.error;
 563         X509_STORE_CTX_cleanup(&ctx);
 564 
 565         return(i);
 566         }
 567 
 568 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 569         {
 570         if (*ca_list != NULL)
 571                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 572 
 573         *ca_list=name_list;
 574         }
 575 
 576 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 577         {
 578         int i;
 579         STACK_OF(X509_NAME) *ret;
 580         X509_NAME *name;
 581 
 582         ret=sk_X509_NAME_new_null();
 583         for (i=0; i<sk_X509_NAME_num(sk); i++)
 584                 {
 585                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 586                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 587                         {
 588                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 589                         return(NULL);
 590                         }
 591                 }
 592         return(ret);
 593         }
 594 
 595 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 596         {
 597         set_client_CA_list(&(s->client_CA),name_list);
 598         }
 599 
 600 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 601         {
 602         set_client_CA_list(&(ctx->client_CA),name_list);
 603         }
 604 
 605 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 606         {
 607         return(ctx->client_CA);
 608         }
 609 
 610 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 611         {
 612         if (s->type == SSL_ST_CONNECT)
 613                 { /* we are in the client */
 614                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 615                         (s->s3 != NULL))
 616                         return(s->s3->tmp.ca_names);
 617                 else
 618                         return(NULL);
 619                 }
 620         else
 621                 {
 622                 if (s->client_CA != NULL)
 623                         return(s->client_CA);
 624                 else
 625                         return(s->ctx->client_CA);
 626                 }
 627         }
 628 
 629 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 630         {
 631         X509_NAME *name;
 632 
 633         if (x == NULL) return(0);
 634         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 635                 return(0);
 636 
 637         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 638                 return(0);
 639 
 640         if (!sk_X509_NAME_push(*sk,name))
 641                 {
 642                 X509_NAME_free(name);
 643                 return(0);
 644                 }
 645         return(1);
 646         }
 647 
 648 int SSL_add_client_CA(SSL *ssl,X509 *x)
 649         {
 650         return(add_client_CA(&(ssl->client_CA),x));
 651         }
 652 
 653 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 654         {
 655         return(add_client_CA(&(ctx->client_CA),x));
 656         }
 657 
 658 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 659         {
 660         return(X509_NAME_cmp(*a,*b));
 661         }
 662 
 663 #ifndef OPENSSL_NO_STDIO
 664 /*!
 665  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 666  * it doesn't really have anything to do with clients (except that a common use
 667  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 668  * much to do with CAs, either, since it will load any old cert.
 669  * \param file the file containing one or more certs.
 670  * \return a ::STACK containing the certs.
 671  */
 672 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 673         {
 674         BIO *in;
 675         X509 *x=NULL;
 676         X509_NAME *xn=NULL;
 677         STACK_OF(X509_NAME) *ret = NULL,*sk;
 678 
 679         sk=sk_X509_NAME_new(xname_cmp);
 680 
 681         in=BIO_new(BIO_s_file_internal());
 682 
 683         if ((sk == NULL) || (in == NULL))
 684                 {
 685                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 686                 goto err;
 687                 }
 688 
 689         if (!BIO_read_filename(in,file))
 690                 goto err;
 691 
 692         for (;;)
 693                 {
 694                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 695                         break;
 696                 if (ret == NULL)
 697                         {
 698                         ret = sk_X509_NAME_new_null();
 699                         if (ret == NULL)
 700                                 {
 701                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 702                                 goto err;
 703                                 }
 704                         }
 705                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 706                 /* check for duplicates */
 707                 xn=X509_NAME_dup(xn);
 708                 if (xn == NULL) goto err;
 709                 if (sk_X509_NAME_find(sk,xn) >= 0)
 710                         X509_NAME_free(xn);
 711                 else
 712                         {
 713                         sk_X509_NAME_push(sk,xn);
 714                         sk_X509_NAME_push(ret,xn);
 715                         }
 716                 }
 717 
 718         if (0)
 719                 {
 720 err:
 721                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 722                 ret=NULL;
 723                 }
 724         if (sk != NULL) sk_X509_NAME_free(sk);
 725         if (in != NULL) BIO_free(in);
 726         if (x != NULL) X509_free(x);
 727         if (ret != NULL)
 728                 ERR_clear_error();
 729         return(ret);
 730         }
 731 #endif
 732 
 733 /*!
 734  * Add a file of certs to a stack.
 735  * \param stack the stack to add to.
 736  * \param file the file to add from. All certs in this file that are not
 737  * already in the stack will be added.
 738  * \return 1 for success, 0 for failure. Note that in the case of failure some
 739  * certs may have been added to \c stack.
 740  */
 741 
 742 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 743                                         const char *file)
 744         {
 745         BIO *in;
 746         X509 *x=NULL;
 747         X509_NAME *xn=NULL;
 748         int ret=1;
 749         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
 750 
 751         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
 752 
 753         in=BIO_new(BIO_s_file_internal());
 754 
 755         if (in == NULL)
 756                 {
 757                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
 758                 goto err;
 759                 }
 760 
 761         if (!BIO_read_filename(in,file))
 762                 goto err;
 763 
 764         for (;;)
 765                 {
 766                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 767                         break;
 768                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 769                 xn=X509_NAME_dup(xn);
 770                 if (xn == NULL) goto err;
 771                 if (sk_X509_NAME_find(stack,xn) >= 0)
 772                         X509_NAME_free(xn);
 773                 else
 774                         sk_X509_NAME_push(stack,xn);
 775                 }
 776 
 777         ERR_clear_error();
 778 
 779         if (0)
 780                 {
 781 err:
 782                 ret=0;
 783                 }
 784         if(in != NULL)
 785                 BIO_free(in);
 786         if(x != NULL)
 787                 X509_free(x);
 788 
 789         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 790 
 791         return ret;
 792         }
 793 
 794 /*!
 795  * Add a directory of certs to a stack.
 796  * \param stack the stack to append to.
 797  * \param dir the directory to append from. All files in this directory will be
 798  * examined as potential certs. Any that are acceptable to
 799  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
 800  * included.
 801  * \return 1 for success, 0 for failure. Note that in the case of failure some
 802  * certs may have been added to \c stack.
 803  */
 804 
 805 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
 806                                        const char *dir)
 807         {
 808         OPENSSL_DIR_CTX *d = NULL;
 809         const char *filename;
 810         int ret = 0;
 811 
 812         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
 813 
 814         /* Note that a side effect is that the CAs will be sorted by name */
 815 
 816         while((filename = OPENSSL_DIR_read(&d, dir)))
 817                 {
 818                 char buf[1024];
 819                 int r;
 820 
 821                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
 822                         {
 823                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
 824                         goto err;
 825                         }
 826 
 827 #ifdef OPENSSL_SYS_VMS
 828                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
 829 #else
 830                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
 831 #endif
 832                 if (r <= 0 || r >= (int)sizeof(buf))
 833                         goto err;
 834                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
 835                         goto err;
 836                 }
 837 
 838         if (errno)
 839                 {
 840                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
 841                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
 842                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
 843                 goto err;
 844                 }
 845 
 846         ret = 1;
 847 
 848 err:
 849         if (d) OPENSSL_DIR_end(&d);
 850         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
 851         return ret;
 852         }