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].serverinfo != NULL)
 334                         {
 335                         /* Just copy everything. */
 336                         ret->pkeys[i].serverinfo =
 337                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 338                         if (ret->pkeys[i].serverinfo == NULL)
 339                                 {
 340                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 341                                 return NULL;
 342                                 }
 343                         ret->pkeys[i].serverinfo_length =
 344                                 cert->pkeys[i].serverinfo_length;
 345                         memcpy(ret->pkeys[i].serverinfo,
 346                                cert->pkeys[i].serverinfo,
 347                                cert->pkeys[i].serverinfo_length);
 348                         }
 349 #endif
 350                 }
 351
 352         ret->references=1;
 353         /* Set digests to defaults. NB: we don't copy existing values as they
 354          * will be set during handshake.
 355          */
 356         ssl_cert_set_default_md(ret);
 357         /* Peer sigalgs set to NULL as we get these from handshake too */
 358         ret->peer_sigalgs = NULL;
 359         ret->peer_sigalgslen = 0;
 360         /* Configured sigalgs however we copy across */
 361
 362         if (cert->conf_sigalgs)
 363                 {
 364                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 365                 if (!ret->conf_sigalgs)
 366                         goto err;
 367                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 368                                                 cert->conf_sigalgslen);
 369                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 370                 }
 371         else
 372                 ret->conf_sigalgs = NULL;
 373
 374         if (cert->client_sigalgs)
 375                 {
 376                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 377                 if (!ret->client_sigalgs)
 378                         goto err;
 379                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 380                                                 cert->client_sigalgslen);
 381                 ret->client_sigalgslen = cert->client_sigalgslen;
 382                 }
 383         else
 384                 ret->client_sigalgs = NULL;
 385         /* Shared sigalgs also NULL */
 386         ret->shared_sigalgs = NULL;
 387         /* Copy any custom client certificate types */
 388         if (cert->ctypes)
 389                 {
 390                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 391                 if (!ret->ctypes)
 392                         goto err;
 393                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 394                 ret->ctype_num = cert->ctype_num;
 395                 }
 396
 397         ret->cert_flags = cert->cert_flags;
 398
 399         ret->cert_cb = cert->cert_cb;
 400         ret->cert_cb_arg = cert->cert_cb_arg;
 401
 402         if (cert->verify_store)
 403                 {
 404                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 405                 ret->verify_store = cert->verify_store;
 406                 }
 407
 408         if (cert->chain_store)
 409                 {
 410                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 411                 ret->chain_store = cert->chain_store;
 412                 }
 413
 414         ret->ciphers_raw = NULL;
 415
 416         return(ret);
 417
 418 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 419 err:
 420 #endif
 421 #ifndef OPENSSL_NO_RSA
 422         if (ret->rsa_tmp != NULL)
 423                 RSA_free(ret->rsa_tmp);
 424 #endif
 425 #ifndef OPENSSL_NO_DH
 426         if (ret->dh_tmp != NULL)
 427                 DH_free(ret->dh_tmp);
 428 #endif
 429 #ifndef OPENSSL_NO_ECDH
 430         if (ret->ecdh_tmp != NULL)
 431                 EC_KEY_free(ret->ecdh_tmp);
 432 #endif
 433
 434         ssl_cert_clear_certs(ret);
 435
 436         return NULL;
 437         }
 438
 439 /* Free up and clear all certificates and chains */
 440
 441 void ssl_cert_clear_certs(CERT *c)
 442         {
 443         int i;
 444         if (c == NULL)
 445                 return;
 446         for (i = 0; i<SSL_PKEY_NUM; i++)
 447                 {
 448                 CERT_PKEY *cpk = c->pkeys + i;
 449                 if (cpk->x509)
 450                         {
 451                         X509_free(cpk->x509);
 452                         cpk->x509 = NULL;
 453                         }
 454                 if (cpk->privatekey)
 455                         {
 456                         EVP_PKEY_free(cpk->privatekey);
 457                         cpk->privatekey = NULL;
 458                         }
 459                 if (cpk->chain)
 460                         {
 461                         sk_X509_pop_free(cpk->chain, X509_free);
 462                         cpk->chain = NULL;
 463                         }
 464 #ifndef OPENSSL_NO_TLSEXT
 465                 if (cpk->serverinfo)
 466                         {
 467                         OPENSSL_free(cpk->serverinfo);
 468                         cpk->serverinfo = NULL;
 469                         cpk->serverinfo_length = 0;
 470                         }
 471 #endif
 472                 /* Clear all flags apart from explicit sign */
 473                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 474                 }
 475         }
 476
 477 void ssl_cert_free(CERT *c)
 478         {
 479         int i;
 480
 481         if(c == NULL)
 482             return;
 483
 484         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 485 #ifdef REF_PRINT
 486         REF_PRINT("CERT",c);
 487 #endif
 488         if (i > 0) return;
 489 #ifdef REF_CHECK
 490         if (i < 0)
 491                 {
 492                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 493                 abort(); /* ok */
 494                 }
 495 #endif
 496
 497 #ifndef OPENSSL_NO_RSA
 498         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 499 #endif
 500 #ifndef OPENSSL_NO_DH
 501         if (c->dh_tmp) DH_free(c->dh_tmp);
 502 #endif
 503 #ifndef OPENSSL_NO_ECDH
 504         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 505 #endif
 506
 507         ssl_cert_clear_certs(c);
 508         if (c->peer_sigalgs)
 509                 OPENSSL_free(c->peer_sigalgs);
 510         if (c->conf_sigalgs)
 511                 OPENSSL_free(c->conf_sigalgs);
 512         if (c->client_sigalgs)
 513                 OPENSSL_free(c->client_sigalgs);
 514         if (c->shared_sigalgs)
 515                 OPENSSL_free(c->shared_sigalgs);
 516         if (c->ctypes)
 517                 OPENSSL_free(c->ctypes);
 518         if (c->verify_store)
 519                 X509_STORE_free(c->verify_store);
 520         if (c->chain_store)
 521                 X509_STORE_free(c->chain_store);
 522         if (c->ciphers_raw)
 523                 OPENSSL_free(c->ciphers_raw);
 524         OPENSSL_free(c);
 525         }
 526
 527 int ssl_cert_inst(CERT **o)
 528         {
 529         /* Create a CERT if there isn't already one
 530          * (which cannot really happen, as it is initially created in
 531          * SSL_CTX_new; but the earlier code usually allows for that one
 532          * being non-existant, so we follow that behaviour, as it might
 533          * turn out that there actually is a reason for it -- but I'm
 534          * not sure that *all* of the existing code could cope with
 535          * s->cert being NULL, otherwise we could do without the
 536          * initialization in SSL_CTX_new).
 537          */
 538
 539         if (o == NULL)
 540                 {
 541                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 542                 return(0);
 543                 }
 544         if (*o == NULL)
 545                 {
 546                 if ((*o = ssl_cert_new()) == NULL)
 547                         {
 548                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 549                         return(0);
 550                         }
 551                 }
 552         return(1);
 553         }
 554
 555 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
 556         {
 557         CERT_PKEY *cpk = c->key;
 558         if (!cpk)
 559                 return 0;
 560         if (cpk->chain)
 561                 sk_X509_pop_free(cpk->chain, X509_free);
 562         cpk->chain = chain;
 563         return 1;
 564         }
 565
 566 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
 567         {
 568         STACK_OF(X509) *dchain;
 569         if (!chain)
 570                 return ssl_cert_set0_chain(c, NULL);
 571         dchain = X509_chain_up_ref(chain);
 572         if (!dchain)
 573                 return 0;
 574         if (!ssl_cert_set0_chain(c, dchain))
 575                 {
 576                 sk_X509_pop_free(dchain, X509_free);
 577                 return 0;
 578                 }
 579         return 1;
 580         }
 581
 582 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
 583         {
 584         CERT_PKEY *cpk = c->key;
 585         if (!cpk)
 586                 return 0;
 587         if (!cpk->chain)
 588                 cpk->chain = sk_X509_new_null();
 589         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 590                 return 0;
 591         return 1;
 592         }
 593
 594 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
 595         {
 596         if (!ssl_cert_add0_chain_cert(c, x))
 597                 return 0;
 598         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 599         return 1;
 600         }
 601
 602 int ssl_cert_select_current(CERT *c, X509 *x)
 603         {
 604         int i;
 605         if (x == NULL)
 606                 return 0;
 607         for (i = 0; i < SSL_PKEY_NUM; i++)
 608                 {
 609                 if (c->pkeys[i].x509 == x)
 610                         {
 611                         c->key = &c->pkeys[i];
 612                         return 1;
 613                         }
 614                 }
 615
 616         for (i = 0; i < SSL_PKEY_NUM; i++)
 617                 {
 618                 if (c->pkeys[i].x509 && !X509_cmp(c->pkeys[i].x509, x))
 619                         {
 620                         c->key = &c->pkeys[i];
 621                         return 1;
 622                         }
 623                 }
 624         return 0;
 625         }
 626
 627 int ssl_cert_set_current(CERT *c, long op)
 628         {
 629         int i, idx;
 630         if (!c)
 631                 return 0;
 632         if (op == SSL_CERT_SET_FIRST)
 633                 idx = 0;
 634         else if (op == SSL_CERT_SET_NEXT)
 635                 {
 636                 idx = (int)(c->key - c->pkeys + 1);
 637                 if (idx >= SSL_PKEY_NUM)
 638                         return 0;
 639                 }
 640         else
 641                 return 0;
 642         for (i = idx; i < SSL_PKEY_NUM; i++)
 643                 {
 644                 if (c->pkeys[i].x509)
 645                         {
 646                         c->key = &c->pkeys[i];
 647                         return 1;
 648                         }
 649                 }
 650         return 0;
 651         }
 652
 653 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 654         {
 655         c->cert_cb = cb;
 656         c->cert_cb_arg = arg;
 657         }
 658
 659 SESS_CERT *ssl_sess_cert_new(void)
 660         {
 661         SESS_CERT *ret;
 662
 663         ret = OPENSSL_malloc(sizeof *ret);
 664         if (ret == NULL)
 665                 {
 666                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 667                 return NULL;
 668                 }
 669
 670         memset(ret, 0 ,sizeof *ret);
 671         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 672         ret->references = 1;
 673
 674         return ret;
 675         }
 676
 677 void ssl_sess_cert_free(SESS_CERT *sc)
 678         {
 679         int i;
 680
 681         if (sc == NULL)
 682                 return;
 683
 684         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 685 #ifdef REF_PRINT
 686         REF_PRINT("SESS_CERT", sc);
 687 #endif
 688         if (i > 0)
 689                 return;
 690 #ifdef REF_CHECK
 691         if (i < 0)
 692                 {
 693                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 694                 abort(); /* ok */
 695                 }
 696 #endif
 697
 698         /* i == 0 */
 699         if (sc->cert_chain != NULL)
 700                 sk_X509_pop_free(sc->cert_chain, X509_free);
 701         for (i = 0; i < SSL_PKEY_NUM; i++)
 702                 {
 703                 if (sc->peer_pkeys[i].x509 != NULL)
 704                         X509_free(sc->peer_pkeys[i].x509);
 705 #if 0 /* We don't have the peer's private key.  These lines are just
 706            * here as a reminder that we're still using a not-quite-appropriate
 707            * data structure. */
 708                 if (sc->peer_pkeys[i].privatekey != NULL)
 709                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 710 #endif
 711                 }
 712
 713 #ifndef OPENSSL_NO_RSA
 714         if (sc->peer_rsa_tmp != NULL)
 715                 RSA_free(sc->peer_rsa_tmp);
 716 #endif
 717 #ifndef OPENSSL_NO_DH
 718         if (sc->peer_dh_tmp != NULL)
 719                 DH_free(sc->peer_dh_tmp);
 720 #endif
 721 #ifndef OPENSSL_NO_ECDH
 722         if (sc->peer_ecdh_tmp != NULL)
 723                 EC_KEY_free(sc->peer_ecdh_tmp);
 724 #endif
 725
 726         OPENSSL_free(sc);
 727         }
 728
 729 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 730         {
 731         sc->peer_cert_type = type;
 732         return(1);
 733         }
 734
 735 #ifndef OPENSSL_NO_DANE
 736 /*
 737  * return value:
 738  * -1:  format or digest error
 739  *  0:  match
 740  *  1:  no match
 741  */
 742 int tlsa_cmp(const X509 *cert, const unsigned char *tlsa_record, unsigned int reclen)
 743 {
 744         const EVP_MD *md;
 745         unsigned char digest[EVP_MAX_MD_SIZE];
 746         unsigned int len, selector, matching_type;
 747         int ret;
 748
 749         if (reclen<3) return -1;
 750
 751         selector      = tlsa_record[1];
 752         matching_type = tlsa_record[2];
 753         tlsa_record   += 3;
 754         reclen        -= 3;
 755
 756         switch (matching_type) {
 757         case 0:                         /* exact match */
 758                 if (selector==0) {      /* full certificate */
 759                         ret = EVP_Digest(tlsa_record,reclen,digest,&len,EVP_sha1(),NULL);
 760                         return ret ? memcmp(cert->sha1_hash,digest,len)!=0 : -1;
 761                 }
 762                 else if (selector==1) { /* SubjectPublicKeyInfo */
 763                         ASN1_BIT_STRING *key = X509_get0_pubkey_bitstr(cert);
 764
 765                         if (key == NULL) return -1;
 766                         if (key->length != reclen) return 1;
 767
 768                         return memcmp(key->data,tlsa_record,reclen)!=0;
 769                 }
 770                 return -1;
 771
 772         case 1:                         /* SHA256 */
 773         case 2:                         /* SHA512 */
 774                 md = matching_type==1 ? EVP_sha256() : EVP_sha512();
 775
 776                 if (reclen!=EVP_MD_size(md)) return -1;
 777
 778                 if (selector==0) {      /* full certificate */
 779                         ret = X509_digest(cert,md,digest,&len);
 780                 }
 781                 else if (selector==1) { /* SubjectPublicKeyInfo */
 782                         ret = X509_pubkey_digest(cert,md,digest,&len);
 783                 }
 784                 else
 785                         return -1;
 786
 787                 return ret ? memcmp(tlsa_record,digest,len)!=0 : -1;
 788         default:
 789                 return -1;
 790         }
 791 }
 792
 793 int dane_verify_callback(int ok, X509_STORE_CTX *ctx)
 794 {
 795         SSL *s = X509_STORE_CTX_get_ex_data(ctx,SSL_get_ex_data_X509_STORE_CTX_idx());
 796         int depth=X509_STORE_CTX_get_error_depth(ctx);
 797         X509 *cert = sk_X509_value(ctx->chain,depth);
 798         unsigned int reclen, certificate_usage, witness_usage=0x100;
 799         const unsigned char *tlsa_record = s->tlsa_record;
 800         int tlsa_ret = -1;
 801
 802         if (s->verify_callback) ok = s->verify_callback(ok,ctx);
 803
 804         if (tlsa_record == NULL) return ok;
 805
 806         if (tlsa_record == (void*)-1) {
 807                 ctx->error = X509_V_ERR_INVALID_CA;     /* temporary code? */
 808                 return 0;
 809         }
 810
 811         while ((reclen = *(unsigned int *)tlsa_record)) {
 812                 tlsa_record += sizeof(unsigned int);
 813
 814                 /*
 815                  * tlsa_record[0]       Certificate Usage field
 816                  * tlsa_record[1]       Selector field
 817                  * tlsa_record[2]       Matching Type Field
 818                  * tlsa_record+3        Certificate Association data
 819                  */
 820                 certificate_usage = tlsa_record[0];
 821
 822                 if (depth==0 || certificate_usage==0 || certificate_usage==2) {
 823                         tlsa_ret = tlsa_cmp(cert,tlsa_record,reclen);
 824                         if (tlsa_ret==0) {
 825                                 s->tlsa_witness = depth<<8|certificate_usage;
 826                                 break;
 827                         }
 828                         else if (tlsa_ret==-1)
 829                                 s->tlsa_witness = -1;   /* something phishy? */
 830                 }
 831
 832                 tlsa_record += reclen;
 833         }
 834
 835         if (depth==0) {
 836                 switch (s->tlsa_witness&0xff) {         /* witnessed usage */
 837                 case 0: /* CA constraint */
 838                         if (s->tlsa_witness<0 && ctx->error==X509_V_OK)
 839                                 ctx->error = X509_V_ERR_INVALID_CA;
 840                         return 0;
 841                 case 1: /* service certificate constraint */
 842                         if (tlsa_ret!=0 && ctx->error==X509_V_OK)
 843                                 ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 844                         return 0;
 845                 case 2: /* trust anchor assertion */
 846                         if ((s->tlsa_witness>>8)>0 && ctx->error==X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY)
 847                                 ctx->error = X509_V_OK;
 848                         break;
 849                 case 3: /* domain-issued certificate */
 850                         if (tlsa_ret==0)
 851                                 ctx->error = X509_V_OK; /* override all errors? */
 852                         break;
 853                 default:/* there were TLSA records, but something phishy happened */
 854                         ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 855                         return ok;
 856                 }
 857         }
 858
 859         /*
 860          * returning 1 makes verify procedure traverse the whole chain,
 861          * not actually approve it...
 862          */
 863         return 1;
 864 }
 865 #endif
 866
 867 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 868         {
 869         X509 *x;
 870         int i;
 871         X509_STORE *verify_store;
 872         X509_STORE_CTX ctx;
 873
 874         if (s->cert->verify_store)
 875                 verify_store = s->cert->verify_store;
 876         else
 877                 verify_store = s->ctx->cert_store;
 878
 879         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 880                 return(0);
 881
 882         x=sk_X509_value(sk,0);
 883         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 884                 {
 885                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 886                 return(0);
 887                 }
 888         /* Set suite B flags if needed */
 889         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 890 #if 0
 891         if (SSL_get_verify_depth(s) >= 0)
 892                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 893 #endif
 894         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 895
 896         /* We need to inherit the verify parameters. These can be determined by
 897          * the context: if its a server it will verify SSL client certificates
 898          * or vice versa.
 899          */
 900
 901         X509_STORE_CTX_set_default(&ctx,
 902                                 s->server ? "ssl_client" : "ssl_server");
 903         /* Anything non-default in "param" should overwrite anything in the
 904          * ctx.
 905          */
 906         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 907
 908 #ifndef OPENSSL_NO_DANE
 909         X509_STORE_CTX_set_verify_cb(&ctx, dane_verify_callback);
 910         s->tlsa_witness = -1;
 911 #else
 912         if (s->verify_callback)
 913                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 914 #endif
 915
 916         if (s->ctx->app_verify_callback != NULL)
 917 #if 1 /* new with OpenSSL 0.9.7 */
 918                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 919 #else
 920                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 921 #endif
 922         else
 923                 {
 924 #ifndef OPENSSL_NO_X509_VERIFY
 925                 i=X509_verify_cert(&ctx);
 926 #else
 927                 i=0;
 928                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 929                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 930 #endif
 931                 }
 932
 933         s->verify_result=ctx.error;
 934         X509_STORE_CTX_cleanup(&ctx);
 935
 936         return(i);
 937         }
 938
 939 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 940         {
 941         if (*ca_list != NULL)
 942                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 943
 944         *ca_list=name_list;
 945         }
 946
 947 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 948         {
 949         int i;
 950         STACK_OF(X509_NAME) *ret;
 951         X509_NAME *name;
 952
 953         ret=sk_X509_NAME_new_null();
 954         for (i=0; i<sk_X509_NAME_num(sk); i++)
 955                 {
 956                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 957                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 958                         {
 959                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 960                         return(NULL);
 961                         }
 962                 }
 963         return(ret);
 964         }
 965
 966 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 967         {
 968         set_client_CA_list(&(s->client_CA),name_list);
 969         }
 970
 971 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 972         {
 973         set_client_CA_list(&(ctx->client_CA),name_list);
 974         }
 975
 976 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 977         {
 978         return(ctx->client_CA);
 979         }
 980
 981 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 982         {
 983         if (s->type == SSL_ST_CONNECT)
 984                 { /* we are in the client */
 985                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 986                         (s->s3 != NULL))
 987                         return(s->s3->tmp.ca_names);
 988                 else
 989                         return(NULL);
 990                 }
 991         else
 992                 {
 993                 if (s->client_CA != NULL)
 994                         return(s->client_CA);
 995                 else
 996                         return(s->ctx->client_CA);
 997                 }
 998         }
 999
1000 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
1001         {
1002         X509_NAME *name;
1003
1004         if (x == NULL) return(0);
1005         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
1006                 return(0);
1007
1008         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
1009                 return(0);
1010
1011         if (!sk_X509_NAME_push(*sk,name))
1012                 {
1013                 X509_NAME_free(name);
1014                 return(0);
1015                 }
1016         return(1);
1017         }
1018
1019 int SSL_add_client_CA(SSL *ssl,X509 *x)
1020         {
1021         return(add_client_CA(&(ssl->client_CA),x));
1022         }
1023
1024 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
1025         {
1026         return(add_client_CA(&(ctx->client_CA),x));
1027         }
1028
1029 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1030         {
1031         return(X509_NAME_cmp(*a,*b));
1032         }
1033
1034 #ifndef OPENSSL_NO_STDIO
1035 /*!
1036  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
1037  * it doesn't really have anything to do with clients (except that a common use
1038  * for a stack of CAs is to send it to the client). Actually, it doesn't have
1039  * much to do with CAs, either, since it will load any old cert.
1040  * \param file the file containing one or more certs.
1041  * \return a ::STACK containing the certs.
1042  */
1043 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
1044         {
1045         BIO *in;
1046         X509 *x=NULL;
1047         X509_NAME *xn=NULL;
1048         STACK_OF(X509_NAME) *ret = NULL,*sk;
1049
1050         sk=sk_X509_NAME_new(xname_cmp);
1051
1052         in=BIO_new(BIO_s_file_internal());
1053
1054         if ((sk == NULL) || (in == NULL))
1055                 {
1056                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1057                 goto err;
1058                 }
1059
1060         if (!BIO_read_filename(in,file))
1061                 goto err;
1062
1063         for (;;)
1064                 {
1065                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1066                         break;
1067                 if (ret == NULL)
1068                         {
1069                         ret = sk_X509_NAME_new_null();
1070                         if (ret == NULL)
1071                                 {
1072                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1073                                 goto err;
1074                                 }
1075                         }
1076                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1077                 /* check for duplicates */
1078                 xn=X509_NAME_dup(xn);
1079                 if (xn == NULL) goto err;
1080                 if (sk_X509_NAME_find(sk,xn) >= 0)
1081                         X509_NAME_free(xn);
1082                 else
1083                         {
1084                         sk_X509_NAME_push(sk,xn);
1085                         sk_X509_NAME_push(ret,xn);
1086                         }
1087                 }
1088
1089         if (0)
1090                 {
1091 err:
1092                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1093                 ret=NULL;
1094                 }
1095         if (sk != NULL) sk_X509_NAME_free(sk);
1096         if (in != NULL) BIO_free(in);
1097         if (x != NULL) X509_free(x);
1098         if (ret != NULL)
1099                 ERR_clear_error();
1100         return(ret);
1101         }
1102 #endif
1103
1104 /*!
1105  * Add a file of certs to a stack.
1106  * \param stack the stack to add to.
1107  * \param file the file to add from. All certs in this file that are not
1108  * already in the stack will be added.
1109  * \return 1 for success, 0 for failure. Note that in the case of failure some
1110  * certs may have been added to \c stack.
1111  */
1112
1113 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1114                                         const char *file)
1115         {
1116         BIO *in;
1117         X509 *x=NULL;
1118         X509_NAME *xn=NULL;
1119         int ret=1;
1120         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1121
1122         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1123
1124         in=BIO_new(BIO_s_file_internal());
1125
1126         if (in == NULL)
1127                 {
1128                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1129                 goto err;
1130                 }
1131
1132         if (!BIO_read_filename(in,file))
1133                 goto err;
1134
1135         for (;;)
1136                 {
1137                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1138                         break;
1139                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1140                 xn=X509_NAME_dup(xn);
1141                 if (xn == NULL) goto err;
1142                 if (sk_X509_NAME_find(stack,xn) >= 0)
1143                         X509_NAME_free(xn);
1144                 else
1145                         sk_X509_NAME_push(stack,xn);
1146                 }
1147
1148         ERR_clear_error();
1149
1150         if (0)
1151                 {
1152 err:
1153                 ret=0;
1154                 }
1155         if(in != NULL)
1156                 BIO_free(in);
1157         if(x != NULL)
1158                 X509_free(x);
1159
1160         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1161
1162         return ret;
1163         }
1164
1165 /*!
1166  * Add a directory of certs to a stack.
1167  * \param stack the stack to append to.
1168  * \param dir the directory to append from. All files in this directory will be
1169  * examined as potential certs. Any that are acceptable to
1170  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1171  * included.
1172  * \return 1 for success, 0 for failure. Note that in the case of failure some
1173  * certs may have been added to \c stack.
1174  */
1175
1176 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1177                                        const char *dir)
1178         {
1179         OPENSSL_DIR_CTX *d = NULL;
1180         const char *filename;
1181         int ret = 0;
1182
1183         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1184
1185         /* Note that a side effect is that the CAs will be sorted by name */
1186
1187         while((filename = OPENSSL_DIR_read(&d, dir)))
1188                 {
1189                 char buf[1024];
1190                 int r;
1191
1192                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1193                         {
1194                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1195                         goto err;
1196                         }
1197
1198 #ifdef OPENSSL_SYS_VMS
1199                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1200 #else
1201                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1202 #endif
1203                 if (r <= 0 || r >= (int)sizeof(buf))
1204                         goto err;
1205                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1206                         goto err;
1207                 }
1208
1209         if (errno)
1210                 {
1211                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1212                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1213                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1214                 goto err;
1215                 }
1216
1217         ret = 1;
1218
1219 err:
1220         if (d) OPENSSL_DIR_end(&d);
1221         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1222         return ret;
1223         }
1224
1225 /* Add a certificate to a BUF_MEM structure */
1226
1227 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1228         {
1229         int n;
1230         unsigned char *p;
1231
1232         n=i2d_X509(x,NULL);
1233         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1234                 {
1235                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1236                 return 0;
1237                 }
1238         p=(unsigned char *)&(buf->data[*l]);
1239         l2n3(n,p);
1240         i2d_X509(x,&p);
1241         *l+=n+3;
1242
1243         return 1;
1244         }
1245
1246 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1247 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1248         {
1249         BUF_MEM *buf = s->init_buf;
1250         int no_chain;
1251         int i;
1252
1253         X509 *x;
1254         STACK_OF(X509) *extra_certs;
1255         X509_STORE *chain_store;
1256
1257         if (cpk)
1258                 x = cpk->x509;
1259         else
1260                 x = NULL;
1261
1262         if (s->cert->chain_store)
1263                 chain_store = s->cert->chain_store;
1264         else
1265                 chain_store = s->ctx->cert_store;
1266
1267         /* If we have a certificate specific chain use it, else use
1268          * parent ctx.
1269          */
1270         if (cpk && cpk->chain)
1271                 extra_certs = cpk->chain;
1272         else
1273                 extra_certs = s->ctx->extra_certs;
1274
1275         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1276                 no_chain = 1;
1277         else
1278                 no_chain = 0;
1279
1280         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1281         if (!BUF_MEM_grow_clean(buf,10))
1282                 {
1283                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1284                 return 0;
1285                 }
1286         if (x != NULL)
1287                 {
1288                 if (no_chain)
1289                         {
1290                         if (!ssl_add_cert_to_buf(buf, l, x))
1291                                 return 0;
1292                         }
1293                 else
1294                         {
1295                         X509_STORE_CTX xs_ctx;
1296
1297                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1298                                 {
1299                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1300                                 return(0);
1301                                 }
1302                         X509_verify_cert(&xs_ctx);
1303                         /* Don't leave errors in the queue */
1304                         ERR_clear_error();
1305                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1306                                 {
1307                                 x = sk_X509_value(xs_ctx.chain, i);
1308
1309                                 if (!ssl_add_cert_to_buf(buf, l, x))
1310                                         {
1311                                         X509_STORE_CTX_cleanup(&xs_ctx);
1312                                         return 0;
1313                                         }
1314                                 }
1315                         X509_STORE_CTX_cleanup(&xs_ctx);
1316                         }
1317                 }
1318         for (i=0; i<sk_X509_num(extra_certs); i++)
1319                 {
1320                 x=sk_X509_value(extra_certs,i);
1321                 if (!ssl_add_cert_to_buf(buf, l, x))
1322                         return 0;
1323                 }
1324
1325         return 1;
1326         }
1327
1328 /* Build a certificate chain for current certificate */
1329 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1330         {
1331         CERT_PKEY *cpk = c->key;
1332         X509_STORE_CTX xs_ctx;
1333         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1334         X509 *x;
1335         int i;
1336
1337         if (!cpk->x509)
1338                 {
1339                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1340                 return 0;
1341                 }
1342
1343         if (c->chain_store)
1344                 chain_store = c->chain_store;
1345
1346         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1347                 untrusted = cpk->chain;
1348
1349         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1350                 {
1351                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1352                 return 0;
1353                 }
1354         /* Set suite B flags if needed */
1355         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1356
1357         i = X509_verify_cert(&xs_ctx);
1358         if (i > 0)
1359                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1360         X509_STORE_CTX_cleanup(&xs_ctx);
1361         if (i <= 0)
1362                 {
1363                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1364                 return 0;
1365                 }
1366         if (cpk->chain)
1367                 sk_X509_pop_free(cpk->chain, X509_free);
1368         /* Remove EE certificate from chain */
1369         x = sk_X509_shift(chain);
1370         X509_free(x);
1371         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1372                 {
1373                 x = sk_X509_pop(chain);
1374                 X509_free(x);
1375                 }
1376         cpk->chain = chain;
1377
1378         return 1;
1379         }
1380
1381 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1382         {
1383         X509_STORE **pstore;
1384         if (chain)
1385                 pstore = &c->chain_store;
1386         else
1387                 pstore = &c->verify_store;
1388         if (*pstore)
1389                 X509_STORE_free(*pstore);
1390         *pstore = store;
1391         if (ref && store)
1392                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1393         return 1;
1394         }
1395