ssl/ssl_cert.c

   1 /*! \file ssl/ssl_cert.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 #include <stdio.h>
 118
 119 #include "e_os.h"
 120 #ifndef NO_SYS_TYPES_H
 121 # include <sys/types.h>
 122 #endif
 123
 124 #include "o_dir.h"
 125 #include <openssl/objects.h>
 126 #include <openssl/bio.h>
 127 #include <openssl/pem.h>
 128 #include <openssl/x509v3.h>
 129 #ifndef OPENSSL_NO_DH
 130 #include <openssl/dh.h>
 131 #endif
 132 #include <openssl/bn.h>
 133 #include "ssl_locl.h"
 134
 135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
 136         {
 137         static volatile int ssl_x509_store_ctx_idx= -1;
 138         int got_write_lock = 0;
 139
 140         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 141
 142         if (ssl_x509_store_ctx_idx < 0)
 143                 {
 144                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 145                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 146                 got_write_lock = 1;
 147
 148                 if (ssl_x509_store_ctx_idx < 0)
 149                         {
 150                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 151                                 0,"SSL for verify callback",NULL,NULL,NULL);
 152                         }
 153                 }
 154
 155         if (got_write_lock)
 156                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 157         else
 158                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 159
 160         return ssl_x509_store_ctx_idx;
 161         }
 162
 163 void ssl_cert_set_default_md(CERT *cert)
 164         {
 165         /* Set digest values to defaults */
 166 #ifndef OPENSSL_NO_DSA
 167         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
 168 #endif
 169 #ifndef OPENSSL_NO_RSA
 170         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
 171         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
 172 #endif
 173 #ifndef OPENSSL_NO_ECDSA
 174         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
 175 #endif
 176         }
 177
 178 CERT *ssl_cert_new(void)
 179         {
 180         CERT *ret;
 181
 182         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
 183         if (ret == NULL)
 184                 {
 185                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
 186                 return(NULL);
 187                 }
 188         memset(ret,0,sizeof(CERT));
 189
 190         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
 191         ret->references=1;
 192         ssl_cert_set_default_md(ret);
 193         return(ret);
 194         }
 195
 196 CERT *ssl_cert_dup(CERT *cert)
 197         {
 198         CERT *ret;
 199         int i;
 200
 201         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
 202         if (ret == NULL)
 203                 {
 204                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 205                 return(NULL);
 206                 }
 207
 208         memset(ret, 0, sizeof(CERT));
 209
 210         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
 211         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
 212          * if you find that more readable */
 213
 214         ret->valid = cert->valid;
 215         ret->mask_k = cert->mask_k;
 216         ret->mask_a = cert->mask_a;
 217         ret->export_mask_k = cert->export_mask_k;
 218         ret->export_mask_a = cert->export_mask_a;
 219
 220 #ifndef OPENSSL_NO_RSA
 221         if (cert->rsa_tmp != NULL)
 222                 {
 223                 RSA_up_ref(cert->rsa_tmp);
 224                 ret->rsa_tmp = cert->rsa_tmp;
 225                 }
 226         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 227 #endif
 228
 229 #ifndef OPENSSL_NO_DH
 230         if (cert->dh_tmp != NULL)
 231                 {
 232                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
 233                 if (ret->dh_tmp == NULL)
 234                         {
 235                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
 236                         goto err;
 237                         }
 238                 if (cert->dh_tmp->priv_key)
 239                         {
 240                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
 241                         if (!b)
 242                                 {
 243                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 244                                 goto err;
 245                                 }
 246                         ret->dh_tmp->priv_key = b;
 247                         }
 248                 if (cert->dh_tmp->pub_key)
 249                         {
 250                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
 251                         if (!b)
 252                                 {
 253                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 254                                 goto err;
 255                                 }
 256                         ret->dh_tmp->pub_key = b;
 257                         }
 258                 }
 259         ret->dh_tmp_cb = cert->dh_tmp_cb;
 260 #endif
 261
 262 #ifndef OPENSSL_NO_ECDH
 263         if (cert->ecdh_tmp)
 264                 {
 265                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 266                 if (ret->ecdh_tmp == NULL)
 267                         {
 268                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 269                         goto err;
 270                         }
 271                 }
 272         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 273         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 274 #endif
 275
 276         for (i = 0; i < SSL_PKEY_NUM; i++)
 277                 {
 278                 CERT_PKEY *cpk = cert->pkeys + i;
 279                 CERT_PKEY *rpk = ret->pkeys + i;
 280                 if (cpk->x509 != NULL)
 281                         {
 282                         rpk->x509 = cpk->x509;
 283                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 284                         }
 285
 286                 if (cpk->privatekey != NULL)
 287                         {
 288                         rpk->privatekey = cpk->privatekey;
 289                         CRYPTO_add(&cpk->privatekey->references, 1,
 290                                 CRYPTO_LOCK_EVP_PKEY);
 291
 292                         switch(i)
 293                                 {
 294                                 /* If there was anything special to do for
 295                                  * certain types of keys, we'd do it here.
 296                                  * (Nothing at the moment, I think.) */
 297
 298                         case SSL_PKEY_RSA_ENC:
 299                         case SSL_PKEY_RSA_SIGN:
 300                                 /* We have an RSA key. */
 301                                 break;
 302
 303                         case SSL_PKEY_DSA_SIGN:
 304                                 /* We have a DSA key. */
 305                                 break;
 306
 307                         case SSL_PKEY_DH_RSA:
 308                         case SSL_PKEY_DH_DSA:
 309                                 /* We have a DH key. */
 310                                 break;
 311
 312                         case SSL_PKEY_ECC:
 313                                 /* We have an ECC key */
 314                                 break;
 315
 316                         default:
 317                                 /* Can't happen. */
 318                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 319                                 }
 320                         }
 321
 322                 if (cpk->chain)
 323                         {
 324                         rpk->chain = X509_chain_up_ref(cpk->chain);
 325                         if (!rpk->chain)
 326                                 {
 327                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 328                                 goto err;
 329                                 }
 330                         }
 331                 rpk->valid_flags = 0;
 332 #ifndef OPENSSL_NO_TLSEXT
 333      if (cert->pkeys[i].authz != NULL)
 334                         {
 335                         /* Just copy everything. */
 336                         ret->pkeys[i].authz_length =
 337                                 cert->pkeys[i].authz_length;
 338                         ret->pkeys[i].authz =
 339                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
 340                         if (ret->pkeys[i].authz == NULL)
 341                                 {
 342                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 343                                 return NULL;
 344                                 }
 345                         memcpy(ret->pkeys[i].authz,
 346                                cert->pkeys[i].authz,
 347                                cert->pkeys[i].authz_length);
 348                         }
 349
 350                 if (cert->pkeys[i].serverinfo != NULL)
 351                         {
 352                         /* Just copy everything. */
 353                         ret->pkeys[i].serverinfo =
 354                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 355                         if (ret->pkeys[i].serverinfo == NULL)
 356                                 {
 357                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 358                                 return NULL;
 359                                 }
 360                         ret->pkeys[i].serverinfo_length =
 361                                 cert->pkeys[i].serverinfo_length;
 362                         memcpy(ret->pkeys[i].serverinfo,
 363                                cert->pkeys[i].serverinfo,
 364                                cert->pkeys[i].serverinfo_length);
 365                         }
 366 #endif
 367                 }
 368
 369         ret->references=1;
 370         /* Set digests to defaults. NB: we don't copy existing values as they
 371          * will be set during handshake.
 372          */
 373         ssl_cert_set_default_md(ret);
 374         /* Peer sigalgs set to NULL as we get these from handshake too */
 375         ret->peer_sigalgs = NULL;
 376         ret->peer_sigalgslen = 0;
 377         /* Configured sigalgs however we copy across */
 378
 379         if (cert->conf_sigalgs)
 380                 {
 381                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 382                 if (!ret->conf_sigalgs)
 383                         goto err;
 384                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 385                                                 cert->conf_sigalgslen);
 386                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 387                 }
 388         else
 389                 ret->conf_sigalgs = NULL;
 390
 391         if (cert->client_sigalgs)
 392                 {
 393                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 394                 if (!ret->client_sigalgs)
 395                         goto err;
 396                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 397                                                 cert->client_sigalgslen);
 398                 ret->client_sigalgslen = cert->client_sigalgslen;
 399                 }
 400         else
 401                 ret->client_sigalgs = NULL;
 402         /* Shared sigalgs also NULL */
 403         ret->shared_sigalgs = NULL;
 404         /* Copy any custom client certificate types */
 405         if (cert->ctypes)
 406                 {
 407                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 408                 if (!ret->ctypes)
 409                         goto err;
 410                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 411                 ret->ctype_num = cert->ctype_num;
 412                 }
 413
 414         ret->cert_flags = cert->cert_flags;
 415
 416         ret->cert_cb = cert->cert_cb;
 417         ret->cert_cb_arg = cert->cert_cb_arg;
 418
 419         if (cert->verify_store)
 420                 {
 421                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 422                 ret->verify_store = cert->verify_store;
 423                 }
 424
 425         if (cert->chain_store)
 426                 {
 427                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 428                 ret->chain_store = cert->chain_store;
 429                 }
 430
 431         ret->ciphers_raw = NULL;
 432
 433         return(ret);
 434
 435 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 436 err:
 437 #endif
 438 #ifndef OPENSSL_NO_RSA
 439         if (ret->rsa_tmp != NULL)
 440                 RSA_free(ret->rsa_tmp);
 441 #endif
 442 #ifndef OPENSSL_NO_DH
 443         if (ret->dh_tmp != NULL)
 444                 DH_free(ret->dh_tmp);
 445 #endif
 446 #ifndef OPENSSL_NO_ECDH
 447         if (ret->ecdh_tmp != NULL)
 448                 EC_KEY_free(ret->ecdh_tmp);
 449 #endif
 450
 451         ssl_cert_clear_certs(ret);
 452
 453         return NULL;
 454         }
 455
 456 /* Free up and clear all certificates and chains */
 457
 458 void ssl_cert_clear_certs(CERT *c)
 459         {
 460         int i;
 461         if (c == NULL)
 462                 return;
 463         for (i = 0; i<SSL_PKEY_NUM; i++)
 464                 {
 465                 CERT_PKEY *cpk = c->pkeys + i;
 466                 if (cpk->x509)
 467                         {
 468                         X509_free(cpk->x509);
 469                         cpk->x509 = NULL;
 470                         }
 471                 if (cpk->privatekey)
 472                         {
 473                         EVP_PKEY_free(cpk->privatekey);
 474                         cpk->privatekey = NULL;
 475                         }
 476                 if (cpk->chain)
 477                         {
 478                         sk_X509_pop_free(cpk->chain, X509_free);
 479                         cpk->chain = NULL;
 480                         }
 481 #ifndef OPENSSL_NO_TLSEXT
 482                 if (cpk->authz)
 483                         {
 484                         OPENSSL_free(cpk->authz);
 485                         cpk->authz = NULL;
 486                         }
 487                 if (cpk->serverinfo)
 488                         {
 489                         OPENSSL_free(cpk->serverinfo);
 490                         cpk->serverinfo = NULL;
 491                         cpk->serverinfo_length = 0;
 492                         }
 493 #endif
 494                 /* Clear all flags apart from explicit sign */
 495                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 496                 }
 497         }
 498
 499 void ssl_cert_free(CERT *c)
 500         {
 501         int i;
 502
 503         if(c == NULL)
 504             return;
 505
 506         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 507 #ifdef REF_PRINT
 508         REF_PRINT("CERT",c);
 509 #endif
 510         if (i > 0) return;
 511 #ifdef REF_CHECK
 512         if (i < 0)
 513                 {
 514                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 515                 abort(); /* ok */
 516                 }
 517 #endif
 518
 519 #ifndef OPENSSL_NO_RSA
 520         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 521 #endif
 522 #ifndef OPENSSL_NO_DH
 523         if (c->dh_tmp) DH_free(c->dh_tmp);
 524 #endif
 525 #ifndef OPENSSL_NO_ECDH
 526         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 527 #endif
 528
 529         ssl_cert_clear_certs(c);
 530         if (c->peer_sigalgs)
 531                 OPENSSL_free(c->peer_sigalgs);
 532         if (c->conf_sigalgs)
 533                 OPENSSL_free(c->conf_sigalgs);
 534         if (c->client_sigalgs)
 535                 OPENSSL_free(c->client_sigalgs);
 536         if (c->shared_sigalgs)
 537                 OPENSSL_free(c->shared_sigalgs);
 538         if (c->ctypes)
 539                 OPENSSL_free(c->ctypes);
 540         if (c->verify_store)
 541                 X509_STORE_free(c->verify_store);
 542         if (c->chain_store)
 543                 X509_STORE_free(c->chain_store);
 544         if (c->ciphers_raw)
 545                 OPENSSL_free(c->ciphers_raw);
 546         OPENSSL_free(c);
 547         }
 548
 549 int ssl_cert_inst(CERT **o)
 550         {
 551         /* Create a CERT if there isn't already one
 552          * (which cannot really happen, as it is initially created in
 553          * SSL_CTX_new; but the earlier code usually allows for that one
 554          * being non-existant, so we follow that behaviour, as it might
 555          * turn out that there actually is a reason for it -- but I'm
 556          * not sure that *all* of the existing code could cope with
 557          * s->cert being NULL, otherwise we could do without the
 558          * initialization in SSL_CTX_new).
 559          */
 560
 561         if (o == NULL)
 562                 {
 563                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 564                 return(0);
 565                 }
 566         if (*o == NULL)
 567                 {
 568                 if ((*o = ssl_cert_new()) == NULL)
 569                         {
 570                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 571                         return(0);
 572                         }
 573                 }
 574         return(1);
 575         }
 576
 577 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 578         {
 579         CERT_PKEY *cpk = c->key;
 580         if (!cpk)
 581                 return 0;
 582         if (cpk->chain)
 583                 sk_X509_pop_free(cpk->chain, X509_free);
 584         cpk->chain = chain;
 585         return 1;
 586         }
 587
 588 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 589         {
 590         STACK_OF(X509) *dchain;
 591         if (!chain)
 592                 return ssl_cert_set0_chain(c, NULL);
 593         dchain = X509_chain_up_ref(chain);
 594         if (!dchain)
 595                 return 0;
 596         if (!ssl_cert_set0_chain(c, dchain))
 597                 {
 598                 sk_X509_pop_free(dchain, X509_free);
 599                 return 0;
 600                 }
 601         return 1;
 602         }
 603
 604 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 605         {
 606         CERT_PKEY *cpk = c->key;
 607         if (!cpk)
 608                 return 0;
 609         if (!cpk->chain)
 610                 cpk->chain = sk_X509_new_null();
 611         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 612                 return 0;
 613         return 1;
 614         }
 615
 616 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 617         {
 618         if (!ssl_cert_add0_chain_cert(c, x))
 619                 return 0;
 620         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 621         return 1;
 622         }
 623
 624 int ssl_cert_select_current(CERT *c, X509 *x)
 625         {
 626         int i;
 627         if (x == NULL)
 628                 return 0;
 629         for (i = 0; i < SSL_PKEY_NUM; i++)
 630                 {
 631                 if (c->pkeys[i].x509 == x)
 632                         {
 633                         c->key = &c->pkeys[i];
 634                         return 1;
 635                         }
 636                 }
 637
 638         for (i = 0; i < SSL_PKEY_NUM; i++)
 639                 {
 640                 if (c->pkeys[i].x509 && !X509_cmp(c->pkeys[i].x509, x))
 641                         {
 642                         c->key = &c->pkeys[i];
 643                         return 1;
 644                         }
 645                 }
 646         return 0;
 647         }
 648
 649 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 650         {
 651         c->cert_cb = cb;
 652         c->cert_cb_arg = arg;
 653         }
 654
 655 SESS_CERT *ssl_sess_cert_new(void)
 656         {
 657         SESS_CERT *ret;
 658
 659         ret = OPENSSL_malloc(sizeof *ret);
 660         if (ret == NULL)
 661                 {
 662                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 663                 return NULL;
 664                 }
 665
 666         memset(ret, 0 ,sizeof *ret);
 667         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 668         ret->references = 1;
 669
 670         return ret;
 671         }
 672
 673 void ssl_sess_cert_free(SESS_CERT *sc)
 674         {
 675         int i;
 676
 677         if (sc == NULL)
 678                 return;
 679
 680         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 681 #ifdef REF_PRINT
 682         REF_PRINT("SESS_CERT", sc);
 683 #endif
 684         if (i > 0)
 685                 return;
 686 #ifdef REF_CHECK
 687         if (i < 0)
 688                 {
 689                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 690                 abort(); /* ok */
 691                 }
 692 #endif
 693
 694         /* i == 0 */
 695         if (sc->cert_chain != NULL)
 696                 sk_X509_pop_free(sc->cert_chain, X509_free);
 697         for (i = 0; i < SSL_PKEY_NUM; i++)
 698                 {
 699                 if (sc->peer_pkeys[i].x509 != NULL)
 700                         X509_free(sc->peer_pkeys[i].x509);
 701 #if 0 /* We don't have the peer's private key.  These lines are just
 702            * here as a reminder that we're still using a not-quite-appropriate
 703            * data structure. */
 704                 if (sc->peer_pkeys[i].privatekey != NULL)
 705                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 706 #endif
 707                 }
 708
 709 #ifndef OPENSSL_NO_RSA
 710         if (sc->peer_rsa_tmp != NULL)
 711                 RSA_free(sc->peer_rsa_tmp);
 712 #endif
 713 #ifndef OPENSSL_NO_DH
 714         if (sc->peer_dh_tmp != NULL)
 715                 DH_free(sc->peer_dh_tmp);
 716 #endif
 717 #ifndef OPENSSL_NO_ECDH
 718         if (sc->peer_ecdh_tmp != NULL)
 719                 EC_KEY_free(sc->peer_ecdh_tmp);
 720 #endif
 721
 722         OPENSSL_free(sc);
 723         }
 724
 725 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 726         {
 727         sc->peer_cert_type = type;
 728         return(1);
 729         }
 730
 731 #ifndef OPENSSL_NO_DANE
 732 /*
 733  * return value:
 734  * -1:  format or digest error
 735  *  0:  match
 736  *  1:  no match
 737  */
 738 int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record, unsigned int reclen)
 739 {
 740         const EVP_MD *md;
 741         unsigned char digest[EVP_MAX_MD_SIZE];
 742         unsigned int len, selector, matching_type;
 743         int ret;
 744
 745         if (reclen<3) return -1;
 746
 747         selector      = tlsa_record[1];
 748         matching_type = tlsa_record[2];
 749         tlsa_record   += 3;
 750         reclen        -= 3;
 751
 752         switch (matching_type) {
 753         case 0:                         /* exact match */
 754                 if (selector==0) {      /* full certificate */
 755                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 756                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 757                 }
 758                 else if (selector==1) { /* SubjectPublicKeyInfo */
 759                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 760
 761                         if (key == NULL) return -1;
 762                         if (key->length != reclen) return 1;
 763
 764                         return memcmp(key->data,tlsa_record,reclen)!=0;
 765                 }
 766                 return -1;
 767
 768         case 1:                         /* SHA256 */
 769         case 2:                         /* SHA512 */
 770                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 771
 772                 if (reclen!=EVP_MD_size(md)) return -1;
 773
 774                 if (selector==0) {      /* full certificate */
 775                         ret = X509_digest(cert,md,digest,&len);
 776                 }
 777                 else if (selector==1) { /* SubjectPublicKeyInfo */
 778                         ret = X509_pubkey_digest(cert,md,digest,&len);
 779                 }
 780                 else
 781                         return -1;
 782
 783                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 784         default:
 785                 return -1;
 786         }
 787 }
 788
 789 int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 790 {
 791         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 792         int depth=X509_STORE_CTX_get_error_depth(ctx);
 793         X509 *cert = sk_X509_value(ctx->chain,depth);
 794         unsigned int reclen, certificate_usage, witness_usage=0x100;
 795         const unsigned char *tlsa_record = s->tlsa_record;
 796         int tlsa_ret = -1;
 797
 798         if (s->verify_callback) ok = s->verify_callback(ok,ctx);
 799
 800         if (tlsa_record == NULL) return ok;
 801
 802         if (tlsa_record == (void*)-1) {
 803                 ctx->error = X509_V_ERR_INVALID_CA;     /* temporary code? */
 804                 return 0;
 805         }
 806
 807         while ((reclen = *(unsigned int *)tlsa_record)) {
 808                 tlsa_record += sizeof(unsigned int);
 809
 810                 /*
 811                  * tlsa_record[0]       Certificate Usage field
 812                  * tlsa_record[1]       Selector field
 813                  * tlsa_record[2]       Matching Type Field
 814                  * tlsa_record+3        Certificate Association data
 815                  */
 816                 certificate_usage = tlsa_record[0];
 817
 818                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 819                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 820                         if (tlsa_ret==0) {
 821                                 s->tlsa_witness = depth<<8|certificate_usage;
 822                                 break;
 823                         }
 824                         else if (tlsa_ret==-1)
 825                                 s->tlsa_witness = -1;   /* something phishy? */
 826                 }
 827
 828                 tlsa_record += reclen;
 829         }
 830
 831         if (depth==0) {
 832                 switch (s->tlsa_witness&0xff) {         /* witnessed usage */
 833                 case 0: /* CA constraint */
 834                         if (s->tlsa_witness<0 && ctx->error==X509_V_OK)
 835                                 ctx->error = X509_V_ERR_INVALID_CA;
 836                         return 0;
 837                 case 1: /* service certificate constraint */
 838                         if (tlsa_ret!=0 && ctx->error==X509_V_OK)
 839                                 ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 840                         return 0;
 841                 case 2: /* trust anchor assertion */
 842                         if ((s->tlsa_witness>>8)>0 && ctx->error==X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY)
 843                                 ctx->error = X509_V_OK;
 844                         break;
 845                 case 3: /* domain-issued certificate */
 846                         if (tlsa_ret==0)
 847                                 ctx->error = X509_V_OK; /* override all errors? */
 848                         break;
 849                 default:/* there were TLSA records, but something phishy happened */
 850                         ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 851                         return ok;
 852                 }
 853         }
 854
 855         /*
 856          * returning 1 makes verify procedure traverse the whole chain,
 857          * not actually approve it...
 858          */
 859         return 1;
 860 }
 861 #endif
 862
 863 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 864         {
 865         X509 *x;
 866         int i;
 867         X509_STORE *verify_store;
 868         X509_STORE_CTX ctx;
 869
 870         if (s->cert->verify_store)
 871                 verify_store = s->cert->verify_store;
 872         else
 873                 verify_store = s->ctx->cert_store;
 874
 875         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 876                 return(0);
 877
 878         x=sk_X509_value(sk,0);
 879         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 880                 {
 881                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 882                 return(0);
 883                 }
 884         /* Set suite B flags if needed */
 885         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 886 #if 0
 887         if (SSL_get_verify_depth(s) >= 0)
 888                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 889 #endif
 890         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 891
 892         /* We need to inherit the verify parameters. These can be determined by
 893          * the context: if its a server it will verify SSL client certificates
 894          * or vice versa.
 895          */
 896
 897         X509_STORE_CTX_set_default(&ctx,
 898                                 s->server ? "ssl_client" : "ssl_server");
 899         /* Anything non-default in "param" should overwrite anything in the
 900          * ctx.
 901          */
 902         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 903
 904 #ifndef OPENSSL_NO_DANE
 905         X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
 906         s->tlsa_witness = -1;
 907 #else
 908         if (s->verify_callback)
 909                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 910 #endif
 911
 912         if (s->ctx->app_verify_callback != NULL)
 913 #if 1 /* new with OpenSSL 0.9.7 */
 914                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 915 #else
 916                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 917 #endif
 918         else
 919                 {
 920 #ifndef OPENSSL_NO_X509_VERIFY
 921                 i=X509_verify_cert(&ctx);
 922 #else
 923                 i=0;
 924                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 925                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 926 #endif
 927                 }
 928
 929         s->verify_result=ctx.error;
 930         X509_STORE_CTX_cleanup(&ctx);
 931
 932         return(i);
 933         }
 934
 935 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 936         {
 937         if (*ca_list != NULL)
 938                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 939
 940         *ca_list=name_list;
 941         }
 942
 943 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 944         {
 945         int i;
 946         STACK_OF(X509_NAME) *ret;
 947         X509_NAME *name;
 948
 949         ret=sk_X509_NAME_new_null();
 950         for (i=0; i<sk_X509_NAME_num(sk); i++)
 951                 {
 952                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 953                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 954                         {
 955                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 956                         return(NULL);
 957                         }
 958                 }
 959         return(ret);
 960         }
 961
 962 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 963         {
 964         set_client_CA_list(&(s->client_CA),name_list);
 965         }
 966
 967 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 968         {
 969         set_client_CA_list(&(ctx->client_CA),name_list);
 970         }
 971
 972 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 973         {
 974         return(ctx->client_CA);
 975         }
 976
 977 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 978         {
 979         if (s->type == SSL_ST_CONNECT)
 980                 { /* we are in the client */
 981                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 982                         (s->s3 != NULL))
 983                         return(s->s3->tmp.ca_names);
 984                 else
 985                         return(NULL);
 986                 }
 987         else
 988                 {
 989                 if (s->client_CA != NULL)
 990                         return(s->client_CA);
 991                 else
 992                         return(s->ctx->client_CA);
 993                 }
 994         }
 995
 996 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 997         {
 998         X509_NAME *name;
 999
1000         if (x == NULL) return(0);
1001         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
1002                 return(0);
1003
1004         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
1005                 return(0);
1006
1007         if (!sk_X509_NAME_push(*sk,name))
1008                 {
1009                 X509_NAME_free(name);
1010                 return(0);
1011                 }
1012         return(1);
1013         }
1014
1015 int SSL_add_client_CA(SSL *ssl,X509 *x)
1016         {
1017         return(add_client_CA(&(ssl->client_CA),x));
1018         }
1019
1020 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
1021         {
1022         return(add_client_CA(&(ctx->client_CA),x));
1023         }
1024
1025 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1026         {
1027         return(X509_NAME_cmp(*a,*b));
1028         }
1029
1030 #ifndef OPENSSL_NO_STDIO
1031 /*!
1032  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
1033  * it doesn't really have anything to do with clients (except that a common use
1034  * for a stack of CAs is to send it to the client). Actually, it doesn't have
1035  * much to do with CAs, either, since it will load any old cert.
1036  * \param file the file containing one or more certs.
1037  * \return a ::STACK containing the certs.
1038  */
1039 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
1040         {
1041         BIO *in;
1042         X509 *x=NULL;
1043         X509_NAME *xn=NULL;
1044         STACK_OF(X509_NAME) *ret = NULL,*sk;
1045
1046         sk=sk_X509_NAME_new(xname_cmp);
1047
1048         in=BIO_new(BIO_s_file_internal());
1049
1050         if ((sk == NULL) || (in == NULL))
1051                 {
1052                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1053                 goto err;
1054                 }
1055
1056         if (!BIO_read_filename(in,file))
1057                 goto err;
1058
1059         for (;;)
1060                 {
1061                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1062                         break;
1063                 if (ret == NULL)
1064                         {
1065                         ret = sk_X509_NAME_new_null();
1066                         if (ret == NULL)
1067                                 {
1068                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1069                                 goto err;
1070                                 }
1071                         }
1072                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1073                 /* check for duplicates */
1074                 xn=X509_NAME_dup(xn);
1075                 if (xn == NULL) goto err;
1076                 if (sk_X509_NAME_find(sk,xn) >= 0)
1077                         X509_NAME_free(xn);
1078                 else
1079                         {
1080                         sk_X509_NAME_push(sk,xn);
1081                         sk_X509_NAME_push(ret,xn);
1082                         }
1083                 }
1084
1085         if (0)
1086                 {
1087 err:
1088                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1089                 ret=NULL;
1090                 }
1091         if (sk != NULL) sk_X509_NAME_free(sk);
1092         if (in != NULL) BIO_free(in);
1093         if (x != NULL) X509_free(x);
1094         if (ret != NULL)
1095                 ERR_clear_error();
1096         return(ret);
1097         }
1098 #endif
1099
1100 /*!
1101  * Add a file of certs to a stack.
1102  * \param stack the stack to add to.
1103  * \param file the file to add from. All certs in this file that are not
1104  * already in the stack will be added.
1105  * \return 1 for success, 0 for failure. Note that in the case of failure some
1106  * certs may have been added to \c stack.
1107  */
1108
1109 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1110                                         const char *file)
1111         {
1112         BIO *in;
1113         X509 *x=NULL;
1114         X509_NAME *xn=NULL;
1115         int ret=1;
1116         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1117
1118         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1119
1120         in=BIO_new(BIO_s_file_internal());
1121
1122         if (in == NULL)
1123                 {
1124                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1125                 goto err;
1126                 }
1127
1128         if (!BIO_read_filename(in,file))
1129                 goto err;
1130
1131         for (;;)
1132                 {
1133                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1134                         break;
1135                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1136                 xn=X509_NAME_dup(xn);
1137                 if (xn == NULL) goto err;
1138                 if (sk_X509_NAME_find(stack,xn) >= 0)
1139                         X509_NAME_free(xn);
1140                 else
1141                         sk_X509_NAME_push(stack,xn);
1142                 }
1143
1144         ERR_clear_error();
1145
1146         if (0)
1147                 {
1148 err:
1149                 ret=0;
1150                 }
1151         if(in != NULL)
1152                 BIO_free(in);
1153         if(x != NULL)
1154                 X509_free(x);
1155
1156         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1157
1158         return ret;
1159         }
1160
1161 /*!
1162  * Add a directory of certs to a stack.
1163  * \param stack the stack to append to.
1164  * \param dir the directory to append from. All files in this directory will be
1165  * examined as potential certs. Any that are acceptable to
1166  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1167  * included.
1168  * \return 1 for success, 0 for failure. Note that in the case of failure some
1169  * certs may have been added to \c stack.
1170  */
1171
1172 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1173                                        const char *dir)
1174         {
1175         OPENSSL_DIR_CTX *d = NULL;
1176         const char *filename;
1177         int ret = 0;
1178
1179         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1180
1181         /* Note that a side effect is that the CAs will be sorted by name */
1182
1183         while((filename = OPENSSL_DIR_read(&d, dir)))
1184                 {
1185                 char buf[1024];
1186                 int r;
1187
1188                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1189                         {
1190                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1191                         goto err;
1192                         }
1193
1194 #ifdef OPENSSL_SYS_VMS
1195                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1196 #else
1197                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1198 #endif
1199                 if (r <= 0 || r >= (int)sizeof(buf))
1200                         goto err;
1201                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1202                         goto err;
1203                 }
1204
1205         if (errno)
1206                 {
1207                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1208                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1209                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1210                 goto err;
1211                 }
1212
1213         ret = 1;
1214
1215 err:
1216         if (d) OPENSSL_DIR_end(&d);
1217         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1218         return ret;
1219         }
1220
1221 /* Add a certificate to a BUF_MEM structure */
1222
1223 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1224         {
1225         int n;
1226         unsigned char *p;
1227
1228         n=i2d_X509(x,NULL);
1229         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1230                 {
1231                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1232                 return 0;
1233                 }
1234         p=(unsigned char *)&(buf->data[*l]);
1235         l2n3(n,p);
1236         i2d_X509(x,&p);
1237         *l+=n+3;
1238
1239         return 1;
1240         }
1241
1242 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1243 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1244         {
1245         BUF_MEM *buf = s->init_buf;
1246         int no_chain;
1247         int i;
1248
1249         X509 *x;
1250         STACK_OF(X509) *extra_certs;
1251         X509_STORE *chain_store;
1252
1253         if (cpk)
1254                 x = cpk->x509;
1255         else
1256                 x = NULL;
1257
1258         if (s->cert->chain_store)
1259                 chain_store = s->cert->chain_store;
1260         else
1261                 chain_store = s->ctx->cert_store;
1262
1263         /* If we have a certificate specific chain use it, else use
1264          * parent ctx.
1265          */
1266         if (cpk && cpk->chain)
1267                 extra_certs = cpk->chain;
1268         else
1269                 extra_certs = s->ctx->extra_certs;
1270
1271         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1272                 no_chain = 1;
1273         else
1274                 no_chain = 0;
1275
1276         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1277         if (!BUF_MEM_grow_clean(buf,10))
1278                 {
1279                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1280                 return 0;
1281                 }
1282         if (x != NULL)
1283                 {
1284                 if (no_chain)
1285                         {
1286                         if (!ssl_add_cert_to_buf(buf, l, x))
1287                                 return 0;
1288                         }
1289                 else
1290                         {
1291                         X509_STORE_CTX xs_ctx;
1292
1293                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1294                                 {
1295                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1296                                 return(0);
1297                                 }
1298                         X509_verify_cert(&xs_ctx);
1299                         /* Don't leave errors in the queue */
1300                         ERR_clear_error();
1301                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1302                                 {
1303                                 x = sk_X509_value(xs_ctx.chain, i);
1304
1305                                 if (!ssl_add_cert_to_buf(buf, l, x))
1306                                         {
1307                                         X509_STORE_CTX_cleanup(&xs_ctx);
1308                                         return 0;
1309                                         }
1310                                 }
1311                         X509_STORE_CTX_cleanup(&xs_ctx);
1312                         }
1313                 }
1314         for (i=0; i<sk_X509_num(extra_certs); i++)
1315                 {
1316                 x=sk_X509_value(extra_certs,i);
1317                 if (!ssl_add_cert_to_buf(buf, l, x))
1318                         return 0;
1319                 }
1320
1321         return 1;
1322         }
1323
1324 /* Build a certificate chain for current certificate */
1325 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1326         {
1327         CERT_PKEY *cpk = c->key;
1328         X509_STORE_CTX xs_ctx;
1329         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1330         X509 *x;
1331         int i;
1332
1333         if (!cpk->x509)
1334                 {
1335                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1336                 return 0;
1337                 }
1338
1339         if (c->chain_store)
1340                 chain_store = c->chain_store;
1341
1342         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1343                 untrusted = cpk->chain;
1344
1345         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1346                 {
1347                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1348                 return 0;
1349                 }
1350         /* Set suite B flags if needed */
1351         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1352
1353         i = X509_verify_cert(&xs_ctx);
1354         if (i > 0)
1355                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1356         X509_STORE_CTX_cleanup(&xs_ctx);
1357         if (i <= 0)
1358                 {
1359                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1360                 return 0;
1361                 }
1362         if (cpk->chain)
1363                 sk_X509_pop_free(cpk->chain, X509_free);
1364         /* Remove EE certificate from chain */
1365         x = sk_X509_shift(chain);
1366         X509_free(x);
1367         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1368                 {
1369                 x = sk_X509_pop(chain);
1370                 X509_free(x);
1371                 }
1372         cpk->chain = chain;
1373
1374         return 1;
1375         }
1376
1377 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1378         {
1379         X509_STORE **pstore;
1380         if (chain)
1381                 pstore = &c->chain_store;
1382         else
1383                 pstore = &c->verify_store;
1384         if (*pstore)
1385                 X509_STORE_free(*pstore);
1386         *pstore = store;
1387         if (ref && store)
1388                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1389         return 1;
1390         }
1391