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 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex);
 136
 137 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
 138         {
 139         static volatile int ssl_x509_store_ctx_idx= -1;
 140         int got_write_lock = 0;
 141
 142         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 143
 144         if (ssl_x509_store_ctx_idx < 0)
 145                 {
 146                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 147                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 148                 got_write_lock = 1;
 149
 150                 if (ssl_x509_store_ctx_idx < 0)
 151                         {
 152                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
 153                                 0,"SSL for verify callback",NULL,NULL,NULL);
 154                         }
 155                 }
 156
 157         if (got_write_lock)
 158                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 159         else
 160                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 161
 162         return ssl_x509_store_ctx_idx;
 163         }
 164
 165 void ssl_cert_set_default_md(CERT *cert)
 166         {
 167         /* Set digest values to defaults */
 168 #ifndef OPENSSL_NO_DSA
 169         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
 170 #endif
 171 #ifndef OPENSSL_NO_RSA
 172         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
 173         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
 174 #endif
 175 #ifndef OPENSSL_NO_ECDSA
 176         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
 177 #endif
 178         }
 179
 180 CERT *ssl_cert_new(void)
 181         {
 182         CERT *ret;
 183
 184         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
 185         if (ret == NULL)
 186                 {
 187                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
 188                 return(NULL);
 189                 }
 190         memset(ret,0,sizeof(CERT));
 191
 192         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
 193         ret->references=1;
 194         ssl_cert_set_default_md(ret);
 195         ret->sec_cb = ssl_security_default_callback;
 196         ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
 197         ret->sec_ex = NULL;
 198         return(ret);
 199         }
 200
 201 CERT *ssl_cert_dup(CERT *cert)
 202         {
 203         CERT *ret;
 204         int i;
 205
 206         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
 207         if (ret == NULL)
 208                 {
 209                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 210                 return(NULL);
 211                 }
 212
 213         memset(ret, 0, sizeof(CERT));
 214
 215         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
 216         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
 217          * if you find that more readable */
 218
 219         ret->valid = cert->valid;
 220         ret->mask_k = cert->mask_k;
 221         ret->mask_a = cert->mask_a;
 222         ret->export_mask_k = cert->export_mask_k;
 223         ret->export_mask_a = cert->export_mask_a;
 224
 225 #ifndef OPENSSL_NO_RSA
 226         if (cert->rsa_tmp != NULL)
 227                 {
 228                 RSA_up_ref(cert->rsa_tmp);
 229                 ret->rsa_tmp = cert->rsa_tmp;
 230                 }
 231         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 232 #endif
 233
 234 #ifndef OPENSSL_NO_DH
 235         if (cert->dh_tmp != NULL)
 236                 {
 237                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
 238                 if (ret->dh_tmp == NULL)
 239                         {
 240                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
 241                         goto err;
 242                         }
 243                 if (cert->dh_tmp->priv_key)
 244                         {
 245                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
 246                         if (!b)
 247                                 {
 248                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 249                                 goto err;
 250                                 }
 251                         ret->dh_tmp->priv_key = b;
 252                         }
 253                 if (cert->dh_tmp->pub_key)
 254                         {
 255                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
 256                         if (!b)
 257                                 {
 258                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
 259                                 goto err;
 260                                 }
 261                         ret->dh_tmp->pub_key = b;
 262                         }
 263                 }
 264         ret->dh_tmp_cb = cert->dh_tmp_cb;
 265         ret->dh_tmp_auto = cert->dh_tmp_auto;
 266 #endif
 267
 268 #ifndef OPENSSL_NO_ECDH
 269         if (cert->ecdh_tmp)
 270                 {
 271                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
 272                 if (ret->ecdh_tmp == NULL)
 273                         {
 274                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
 275                         goto err;
 276                         }
 277                 }
 278         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
 279         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
 280 #endif
 281
 282         for (i = 0; i < SSL_PKEY_NUM; i++)
 283                 {
 284                 CERT_PKEY *cpk = cert->pkeys + i;
 285                 CERT_PKEY *rpk = ret->pkeys + i;
 286                 if (cpk->x509 != NULL)
 287                         {
 288                         rpk->x509 = cpk->x509;
 289                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
 290                         }
 291
 292                 if (cpk->privatekey != NULL)
 293                         {
 294                         rpk->privatekey = cpk->privatekey;
 295                         CRYPTO_add(&cpk->privatekey->references, 1,
 296                                 CRYPTO_LOCK_EVP_PKEY);
 297
 298                         switch(i)
 299                                 {
 300                                 /* If there was anything special to do for
 301                                  * certain types of keys, we'd do it here.
 302                                  * (Nothing at the moment, I think.) */
 303
 304                         case SSL_PKEY_RSA_ENC:
 305                         case SSL_PKEY_RSA_SIGN:
 306                                 /* We have an RSA key. */
 307                                 break;
 308
 309                         case SSL_PKEY_DSA_SIGN:
 310                                 /* We have a DSA key. */
 311                                 break;
 312
 313                         case SSL_PKEY_DH_RSA:
 314                         case SSL_PKEY_DH_DSA:
 315                                 /* We have a DH key. */
 316                                 break;
 317
 318                         case SSL_PKEY_ECC:
 319                                 /* We have an ECC key */
 320                                 break;
 321
 322                         default:
 323                                 /* Can't happen. */
 324                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
 325                                 }
 326                         }
 327
 328                 if (cpk->chain)
 329                         {
 330                         rpk->chain = X509_chain_up_ref(cpk->chain);
 331                         if (!rpk->chain)
 332                                 {
 333                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 334                                 goto err;
 335                                 }
 336                         }
 337                 rpk->valid_flags = 0;
 338 #ifndef OPENSSL_NO_TLSEXT
 339                 if (cert->pkeys[i].serverinfo != NULL)
 340                         {
 341                         /* Just copy everything. */
 342                         ret->pkeys[i].serverinfo =
 343                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
 344                         if (ret->pkeys[i].serverinfo == NULL)
 345                                 {
 346                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
 347                                 return NULL;
 348                                 }
 349                         ret->pkeys[i].serverinfo_length =
 350                                 cert->pkeys[i].serverinfo_length;
 351                         memcpy(ret->pkeys[i].serverinfo,
 352                                cert->pkeys[i].serverinfo,
 353                                cert->pkeys[i].serverinfo_length);
 354                         }
 355 #endif
 356                 }
 357
 358         ret->references=1;
 359         /* Set digests to defaults. NB: we don't copy existing values as they
 360          * will be set during handshake.
 361          */
 362         ssl_cert_set_default_md(ret);
 363         /* Peer sigalgs set to NULL as we get these from handshake too */
 364         ret->peer_sigalgs = NULL;
 365         ret->peer_sigalgslen = 0;
 366         /* Configured sigalgs however we copy across */
 367
 368         if (cert->conf_sigalgs)
 369                 {
 370                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
 371                 if (!ret->conf_sigalgs)
 372                         goto err;
 373                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
 374                                                 cert->conf_sigalgslen);
 375                 ret->conf_sigalgslen = cert->conf_sigalgslen;
 376                 }
 377         else
 378                 ret->conf_sigalgs = NULL;
 379
 380         if (cert->client_sigalgs)
 381                 {
 382                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
 383                 if (!ret->client_sigalgs)
 384                         goto err;
 385                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
 386                                                 cert->client_sigalgslen);
 387                 ret->client_sigalgslen = cert->client_sigalgslen;
 388                 }
 389         else
 390                 ret->client_sigalgs = NULL;
 391         /* Shared sigalgs also NULL */
 392         ret->shared_sigalgs = NULL;
 393         /* Copy any custom client certificate types */
 394         if (cert->ctypes)
 395                 {
 396                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
 397                 if (!ret->ctypes)
 398                         goto err;
 399                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
 400                 ret->ctype_num = cert->ctype_num;
 401                 }
 402
 403         ret->cert_flags = cert->cert_flags;
 404
 405         ret->cert_cb = cert->cert_cb;
 406         ret->cert_cb_arg = cert->cert_cb_arg;
 407
 408         if (cert->verify_store)
 409                 {
 410                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
 411                 ret->verify_store = cert->verify_store;
 412                 }
 413
 414         if (cert->chain_store)
 415                 {
 416                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
 417                 ret->chain_store = cert->chain_store;
 418                 }
 419
 420         ret->ciphers_raw = NULL;
 421
 422         ret->sec_cb = cert->sec_cb;
 423         ret->sec_level = cert->sec_level;
 424         ret->sec_ex = cert->sec_ex;
 425
 426 #ifndef OPENSSL_NO_TLSEXT
 427         if (cert->custom_cli_ext_records_count)
 428                 {
 429                 ret->custom_cli_ext_records = BUF_memdup(cert->custom_cli_ext_records, sizeof(custom_cli_ext_record) * cert->custom_cli_ext_records_count);
 430                 if (ret->custom_cli_ext_records == NULL)
 431                         goto err;
 432                 ret->custom_cli_ext_records_count =
 433                                         cert->custom_cli_ext_records_count;
 434                 }
 435
 436         if (cert->custom_srv_ext_records_count)
 437                 {
 438                 ret->custom_srv_ext_records = BUF_memdup(cert->custom_srv_ext_records, sizeof(custom_srv_ext_record) * cert->custom_srv_ext_records_count);
 439                 if (ret->custom_srv_ext_records == NULL)
 440                         goto err;
 441                 ret->custom_srv_ext_records_count =
 442                                         cert->custom_srv_ext_records_count;
 443                 }
 444
 445 #endif
 446
 447         return(ret);
 448
 449 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 450 err:
 451 #endif
 452 #ifndef OPENSSL_NO_RSA
 453         if (ret->rsa_tmp != NULL)
 454                 RSA_free(ret->rsa_tmp);
 455 #endif
 456 #ifndef OPENSSL_NO_DH
 457         if (ret->dh_tmp != NULL)
 458                 DH_free(ret->dh_tmp);
 459 #endif
 460 #ifndef OPENSSL_NO_ECDH
 461         if (ret->ecdh_tmp != NULL)
 462                 EC_KEY_free(ret->ecdh_tmp);
 463 #endif
 464
 465 #ifndef OPENSSL_NO_TLSEXT
 466         if (ret->custom_cli_ext_records)
 467                 OPENSSL_free(ret->custom_cli_ext_records);
 468         if (ret->custom_srv_ext_records)
 469                 OPENSSL_free(ret->custom_srv_ext_records);
 470 #endif
 471
 472         ssl_cert_clear_certs(ret);
 473
 474         return NULL;
 475         }
 476
 477 /* Free up and clear all certificates and chains */
 478
 479 void ssl_cert_clear_certs(CERT *c)
 480         {
 481         int i;
 482         if (c == NULL)
 483                 return;
 484         for (i = 0; i<SSL_PKEY_NUM; i++)
 485                 {
 486                 CERT_PKEY *cpk = c->pkeys + i;
 487                 if (cpk->x509)
 488                         {
 489                         X509_free(cpk->x509);
 490                         cpk->x509 = NULL;
 491                         }
 492                 if (cpk->privatekey)
 493                         {
 494                         EVP_PKEY_free(cpk->privatekey);
 495                         cpk->privatekey = NULL;
 496                         }
 497                 if (cpk->chain)
 498                         {
 499                         sk_X509_pop_free(cpk->chain, X509_free);
 500                         cpk->chain = NULL;
 501                         }
 502 #ifndef OPENSSL_NO_TLSEXT
 503                 if (cpk->serverinfo)
 504                         {
 505                         OPENSSL_free(cpk->serverinfo);
 506                         cpk->serverinfo = NULL;
 507                         cpk->serverinfo_length = 0;
 508                         }
 509 #endif
 510                 /* Clear all flags apart from explicit sign */
 511                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 512                 }
 513         }
 514
 515 void ssl_cert_free(CERT *c)
 516         {
 517         int i;
 518
 519         if(c == NULL)
 520             return;
 521
 522         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 523 #ifdef REF_PRINT
 524         REF_PRINT("CERT",c);
 525 #endif
 526         if (i > 0) return;
 527 #ifdef REF_CHECK
 528         if (i < 0)
 529                 {
 530                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 531                 abort(); /* ok */
 532                 }
 533 #endif
 534
 535 #ifndef OPENSSL_NO_RSA
 536         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 537 #endif
 538 #ifndef OPENSSL_NO_DH
 539         if (c->dh_tmp) DH_free(c->dh_tmp);
 540 #endif
 541 #ifndef OPENSSL_NO_ECDH
 542         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 543 #endif
 544
 545         ssl_cert_clear_certs(c);
 546         if (c->peer_sigalgs)
 547                 OPENSSL_free(c->peer_sigalgs);
 548         if (c->conf_sigalgs)
 549                 OPENSSL_free(c->conf_sigalgs);
 550         if (c->client_sigalgs)
 551                 OPENSSL_free(c->client_sigalgs);
 552         if (c->shared_sigalgs)
 553                 OPENSSL_free(c->shared_sigalgs);
 554         if (c->ctypes)
 555                 OPENSSL_free(c->ctypes);
 556         if (c->verify_store)
 557                 X509_STORE_free(c->verify_store);
 558         if (c->chain_store)
 559                 X509_STORE_free(c->chain_store);
 560         if (c->ciphers_raw)
 561                 OPENSSL_free(c->ciphers_raw);
 562 #ifndef OPENSSL_NO_TLSEXT
 563         if (c->custom_cli_ext_records)
 564                 OPENSSL_free(c->custom_cli_ext_records);
 565         if (c->custom_srv_ext_records)
 566                 OPENSSL_free(c->custom_srv_ext_records);
 567 #endif
 568         OPENSSL_free(c);
 569         }
 570
 571 int ssl_cert_inst(CERT **o)
 572         {
 573         /* Create a CERT if there isn't already one
 574          * (which cannot really happen, as it is initially created in
 575          * SSL_CTX_new; but the earlier code usually allows for that one
 576          * being non-existant, so we follow that behaviour, as it might
 577          * turn out that there actually is a reason for it -- but I'm
 578          * not sure that *all* of the existing code could cope with
 579          * s->cert being NULL, otherwise we could do without the
 580          * initialization in SSL_CTX_new).
 581          */
 582
 583         if (o == NULL)
 584                 {
 585                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 586                 return(0);
 587                 }
 588         if (*o == NULL)
 589                 {
 590                 if ((*o = ssl_cert_new()) == NULL)
 591                         {
 592                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 593                         return(0);
 594                         }
 595                 }
 596         return(1);
 597         }
 598
 599 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
 600         {
 601         int i, r;
 602         CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
 603         if (!cpk)
 604                 return 0;
 605         if (cpk->chain)
 606                 sk_X509_pop_free(cpk->chain, X509_free);
 607         for (i = 0; i < sk_X509_num(chain); i++)
 608                 {
 609                 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
 610                 if (r != 1)
 611                         {
 612                         SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
 613                         return 0;
 614                         }
 615                 }
 616         cpk->chain = chain;
 617         return 1;
 618         }
 619
 620 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
 621         {
 622         STACK_OF(X509) *dchain;
 623         if (!chain)
 624                 return ssl_cert_set0_chain(s, ctx, NULL);
 625         dchain = X509_chain_up_ref(chain);
 626         if (!dchain)
 627                 return 0;
 628         if (!ssl_cert_set0_chain(s, ctx, dchain))
 629                 {
 630                 sk_X509_pop_free(dchain, X509_free);
 631                 return 0;
 632                 }
 633         return 1;
 634         }
 635
 636 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
 637         {
 638         int r;
 639         CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
 640         if (!cpk)
 641                 return 0;
 642         r = ssl_security_cert(s, ctx, x, 0, 0);
 643         if (r != 1)
 644                 {
 645                 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
 646                 return 0;
 647                 }
 648         if (!cpk->chain)
 649                 cpk->chain = sk_X509_new_null();
 650         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 651                 return 0;
 652         return 1;
 653         }
 654
 655 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
 656         {
 657         if (!ssl_cert_add0_chain_cert(s, ctx, x))
 658                 return 0;
 659         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 660         return 1;
 661         }
 662
 663 int ssl_cert_select_current(CERT *c, X509 *x)
 664         {
 665         int i;
 666         if (x == NULL)
 667                 return 0;
 668         for (i = 0; i < SSL_PKEY_NUM; i++)
 669                 {
 670                 CERT_PKEY *cpk = c->pkeys + i;
 671                 if (cpk->x509 == x && cpk->privatekey)
 672                         {
 673                         c->key = cpk;
 674                         return 1;
 675                         }
 676                 }
 677
 678         for (i = 0; i < SSL_PKEY_NUM; i++)
 679                 {
 680                 CERT_PKEY *cpk = c->pkeys + i;
 681                 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
 682                         {
 683                         c->key = cpk;
 684                         return 1;
 685                         }
 686                 }
 687         return 0;
 688         }
 689
 690 int ssl_cert_set_current(CERT *c, long op)
 691         {
 692         int i, idx;
 693         if (!c)
 694                 return 0;
 695         if (op == SSL_CERT_SET_FIRST)
 696                 idx = 0;
 697         else if (op == SSL_CERT_SET_NEXT)
 698                 {
 699                 idx = (int)(c->key - c->pkeys + 1);
 700                 if (idx >= SSL_PKEY_NUM)
 701                         return 0;
 702                 }
 703         else
 704                 return 0;
 705         for (i = idx; i < SSL_PKEY_NUM; i++)
 706                 {
 707                 CERT_PKEY *cpk = c->pkeys + i;
 708                 if (cpk->x509 && cpk->privatekey)
 709                         {
 710                         c->key = cpk;
 711                         return 1;
 712                         }
 713                 }
 714         return 0;
 715         }
 716
 717 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 718         {
 719         c->cert_cb = cb;
 720         c->cert_cb_arg = arg;
 721         }
 722
 723 SESS_CERT *ssl_sess_cert_new(void)
 724         {
 725         SESS_CERT *ret;
 726
 727         ret = OPENSSL_malloc(sizeof *ret);
 728         if (ret == NULL)
 729                 {
 730                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 731                 return NULL;
 732                 }
 733
 734         memset(ret, 0 ,sizeof *ret);
 735         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 736         ret->references = 1;
 737
 738         return ret;
 739         }
 740
 741 void ssl_sess_cert_free(SESS_CERT *sc)
 742         {
 743         int i;
 744
 745         if (sc == NULL)
 746                 return;
 747
 748         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 749 #ifdef REF_PRINT
 750         REF_PRINT("SESS_CERT", sc);
 751 #endif
 752         if (i > 0)
 753                 return;
 754 #ifdef REF_CHECK
 755         if (i < 0)
 756                 {
 757                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 758                 abort(); /* ok */
 759                 }
 760 #endif
 761
 762         /* i == 0 */
 763         if (sc->cert_chain != NULL)
 764                 sk_X509_pop_free(sc->cert_chain, X509_free);
 765         for (i = 0; i < SSL_PKEY_NUM; i++)
 766                 {
 767                 if (sc->peer_pkeys[i].x509 != NULL)
 768                         X509_free(sc->peer_pkeys[i].x509);
 769 #if 0 /* We don't have the peer's private key.  These lines are just
 770            * here as a reminder that we're still using a not-quite-appropriate
 771            * data structure. */
 772                 if (sc->peer_pkeys[i].privatekey != NULL)
 773                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 774 #endif
 775                 }
 776
 777 #ifndef OPENSSL_NO_RSA
 778         if (sc->peer_rsa_tmp != NULL)
 779                 RSA_free(sc->peer_rsa_tmp);
 780 #endif
 781 #ifndef OPENSSL_NO_DH
 782         if (sc->peer_dh_tmp != NULL)
 783                 DH_free(sc->peer_dh_tmp);
 784 #endif
 785 #ifndef OPENSSL_NO_ECDH
 786         if (sc->peer_ecdh_tmp != NULL)
 787                 EC_KEY_free(sc->peer_ecdh_tmp);
 788 #endif
 789
 790         OPENSSL_free(sc);
 791         }
 792
 793 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 794         {
 795         sc->peer_cert_type = type;
 796         return(1);
 797         }
 798
 799 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 800         {
 801         X509 *x;
 802         int i;
 803         X509_STORE *verify_store;
 804         X509_STORE_CTX ctx;
 805
 806         if (s->cert->verify_store)
 807                 verify_store = s->cert->verify_store;
 808         else
 809                 verify_store = s->ctx->cert_store;
 810
 811         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 812                 return(0);
 813
 814         x=sk_X509_value(sk,0);
 815         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 816                 {
 817                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 818                 return(0);
 819                 }
 820         /* Set suite B flags if needed */
 821         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 822 #if 0
 823         if (SSL_get_verify_depth(s) >= 0)
 824                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 825 #endif
 826         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 827
 828         /* We need to inherit the verify parameters. These can be determined by
 829          * the context: if its a server it will verify SSL client certificates
 830          * or vice versa.
 831          */
 832
 833         X509_STORE_CTX_set_default(&ctx,
 834                                 s->server ? "ssl_client" : "ssl_server");
 835         /* Anything non-default in "param" should overwrite anything in the
 836          * ctx.
 837          */
 838         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 839
 840         if (s->verify_callback)
 841                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 842
 843         if (s->ctx->app_verify_callback != NULL)
 844 #if 1 /* new with OpenSSL 0.9.7 */
 845                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 846 #else
 847                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 848 #endif
 849         else
 850                 {
 851 #ifndef OPENSSL_NO_X509_VERIFY
 852                 i=X509_verify_cert(&ctx);
 853 #if 0
 854                 /* Dummy error calls so mkerr generates them */
 855                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_EE_KEY_TOO_SMALL);
 856                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_CA_KEY_TOO_SMALL);
 857                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_CA_MD_TOO_WEAK);
 858 #endif
 859                 if (i > 0)
 860                         i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
 861 #else
 862                 i=0;
 863                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 864                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 865 #endif
 866                 }
 867
 868         s->verify_result=ctx.error;
 869         X509_STORE_CTX_cleanup(&ctx);
 870
 871         return(i);
 872         }
 873
 874 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 875         {
 876         if (*ca_list != NULL)
 877                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 878
 879         *ca_list=name_list;
 880         }
 881
 882 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 883         {
 884         int i;
 885         STACK_OF(X509_NAME) *ret;
 886         X509_NAME *name;
 887
 888         ret=sk_X509_NAME_new_null();
 889         for (i=0; i<sk_X509_NAME_num(sk); i++)
 890                 {
 891                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 892                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 893                         {
 894                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 895                         return(NULL);
 896                         }
 897                 }
 898         return(ret);
 899         }
 900
 901 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 902         {
 903         set_client_CA_list(&(s->client_CA),name_list);
 904         }
 905
 906 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 907         {
 908         set_client_CA_list(&(ctx->client_CA),name_list);
 909         }
 910
 911 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 912         {
 913         return(ctx->client_CA);
 914         }
 915
 916 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 917         {
 918         if (s->type == SSL_ST_CONNECT)
 919                 { /* we are in the client */
 920                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 921                         (s->s3 != NULL))
 922                         return(s->s3->tmp.ca_names);
 923                 else
 924                         return(NULL);
 925                 }
 926         else
 927                 {
 928                 if (s->client_CA != NULL)
 929                         return(s->client_CA);
 930                 else
 931                         return(s->ctx->client_CA);
 932                 }
 933         }
 934
 935 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 936         {
 937         X509_NAME *name;
 938
 939         if (x == NULL) return(0);
 940         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 941                 return(0);
 942
 943         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 944                 return(0);
 945
 946         if (!sk_X509_NAME_push(*sk,name))
 947                 {
 948                 X509_NAME_free(name);
 949                 return(0);
 950                 }
 951         return(1);
 952         }
 953
 954 int SSL_add_client_CA(SSL *ssl,X509 *x)
 955         {
 956         return(add_client_CA(&(ssl->client_CA),x));
 957         }
 958
 959 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 960         {
 961         return(add_client_CA(&(ctx->client_CA),x));
 962         }
 963
 964 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 965         {
 966         return(X509_NAME_cmp(*a,*b));
 967         }
 968
 969 #ifndef OPENSSL_NO_STDIO
 970 /*!
 971  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 972  * it doesn't really have anything to do with clients (except that a common use
 973  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 974  * much to do with CAs, either, since it will load any old cert.
 975  * \param file the file containing one or more certs.
 976  * \return a ::STACK containing the certs.
 977  */
 978 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 979         {
 980         BIO *in;
 981         X509 *x=NULL;
 982         X509_NAME *xn=NULL;
 983         STACK_OF(X509_NAME) *ret = NULL,*sk;
 984
 985         sk=sk_X509_NAME_new(xname_cmp);
 986
 987         in=BIO_new(BIO_s_file_internal());
 988
 989         if ((sk == NULL) || (in == NULL))
 990                 {
 991                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 992                 goto err;
 993                 }
 994
 995         if (!BIO_read_filename(in,file))
 996                 goto err;
 997
 998         for (;;)
 999                 {
1000                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1001                         break;
1002                 if (ret == NULL)
1003                         {
1004                         ret = sk_X509_NAME_new_null();
1005                         if (ret == NULL)
1006                                 {
1007                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1008                                 goto err;
1009                                 }
1010                         }
1011                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1012                 /* check for duplicates */
1013                 xn=X509_NAME_dup(xn);
1014                 if (xn == NULL) goto err;
1015                 if (sk_X509_NAME_find(sk,xn) >= 0)
1016                         X509_NAME_free(xn);
1017                 else
1018                         {
1019                         sk_X509_NAME_push(sk,xn);
1020                         sk_X509_NAME_push(ret,xn);
1021                         }
1022                 }
1023
1024         if (0)
1025                 {
1026 err:
1027                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1028                 ret=NULL;
1029                 }
1030         if (sk != NULL) sk_X509_NAME_free(sk);
1031         if (in != NULL) BIO_free(in);
1032         if (x != NULL) X509_free(x);
1033         if (ret != NULL)
1034                 ERR_clear_error();
1035         return(ret);
1036         }
1037 #endif
1038
1039 /*!
1040  * Add a file of certs to a stack.
1041  * \param stack the stack to add to.
1042  * \param file the file to add from. All certs in this file that are not
1043  * already in the stack will be added.
1044  * \return 1 for success, 0 for failure. Note that in the case of failure some
1045  * certs may have been added to \c stack.
1046  */
1047
1048 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1049                                         const char *file)
1050         {
1051         BIO *in;
1052         X509 *x=NULL;
1053         X509_NAME *xn=NULL;
1054         int ret=1;
1055         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1056
1057         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1058
1059         in=BIO_new(BIO_s_file_internal());
1060
1061         if (in == NULL)
1062                 {
1063                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1064                 goto err;
1065                 }
1066
1067         if (!BIO_read_filename(in,file))
1068                 goto err;
1069
1070         for (;;)
1071                 {
1072                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1073                         break;
1074                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1075                 xn=X509_NAME_dup(xn);
1076                 if (xn == NULL) goto err;
1077                 if (sk_X509_NAME_find(stack,xn) >= 0)
1078                         X509_NAME_free(xn);
1079                 else
1080                         sk_X509_NAME_push(stack,xn);
1081                 }
1082
1083         ERR_clear_error();
1084
1085         if (0)
1086                 {
1087 err:
1088                 ret=0;
1089                 }
1090         if(in != NULL)
1091                 BIO_free(in);
1092         if(x != NULL)
1093                 X509_free(x);
1094
1095         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1096
1097         return ret;
1098         }
1099
1100 /*!
1101  * Add a directory of certs to a stack.
1102  * \param stack the stack to append to.
1103  * \param dir the directory to append from. All files in this directory will be
1104  * examined as potential certs. Any that are acceptable to
1105  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1106  * included.
1107  * \return 1 for success, 0 for failure. Note that in the case of failure some
1108  * certs may have been added to \c stack.
1109  */
1110
1111 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1112                                        const char *dir)
1113         {
1114         OPENSSL_DIR_CTX *d = NULL;
1115         const char *filename;
1116         int ret = 0;
1117
1118         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1119
1120         /* Note that a side effect is that the CAs will be sorted by name */
1121
1122         while((filename = OPENSSL_DIR_read(&d, dir)))
1123                 {
1124                 char buf[1024];
1125                 int r;
1126
1127                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1128                         {
1129                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1130                         goto err;
1131                         }
1132
1133 #ifdef OPENSSL_SYS_VMS
1134                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1135 #else
1136                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1137 #endif
1138                 if (r <= 0 || r >= (int)sizeof(buf))
1139                         goto err;
1140                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1141                         goto err;
1142                 }
1143
1144         if (errno)
1145                 {
1146                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1147                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1148                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1149                 goto err;
1150                 }
1151
1152         ret = 1;
1153
1154 err:
1155         if (d) OPENSSL_DIR_end(&d);
1156         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1157         return ret;
1158         }
1159
1160 /* Add a certificate to a BUF_MEM structure */
1161
1162 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1163         {
1164         int n;
1165         unsigned char *p;
1166
1167         n=i2d_X509(x,NULL);
1168         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1169                 {
1170                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1171                 return 0;
1172                 }
1173         p=(unsigned char *)&(buf->data[*l]);
1174         l2n3(n,p);
1175         i2d_X509(x,&p);
1176         *l+=n+3;
1177
1178         return 1;
1179         }
1180
1181 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1182 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1183         {
1184         BUF_MEM *buf = s->init_buf;
1185         int i;
1186
1187         X509 *x;
1188         STACK_OF(X509) *extra_certs;
1189         X509_STORE *chain_store;
1190
1191         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1192         if (!BUF_MEM_grow_clean(buf,10))
1193                 {
1194                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1195                 return 0;
1196                 }
1197
1198         if (!cpk || !cpk->x509)
1199                 return 1;
1200
1201         x = cpk->x509;
1202
1203         /* If we have a certificate specific chain use it, else use
1204          * parent ctx.
1205          */
1206         if (cpk->chain)
1207                 extra_certs = cpk->chain;
1208         else
1209                 extra_certs = s->ctx->extra_certs;
1210
1211         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1212                 chain_store = NULL;
1213         else if (s->cert->chain_store)
1214                 chain_store = s->cert->chain_store;
1215         else
1216                 chain_store = s->ctx->cert_store;
1217
1218         if (chain_store)
1219                 {
1220                 X509_STORE_CTX xs_ctx;
1221
1222                 if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1223                         {
1224                         SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1225                         return(0);
1226                         }
1227                 X509_verify_cert(&xs_ctx);
1228                 /* Don't leave errors in the queue */
1229                 ERR_clear_error();
1230                 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
1231                 if (i != 1)
1232                         {
1233                         X509_STORE_CTX_cleanup(&xs_ctx);
1234                         SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1235                         return 0;
1236                         }
1237                 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1238                         {
1239                         x = sk_X509_value(xs_ctx.chain, i);
1240
1241                         if (!ssl_add_cert_to_buf(buf, l, x))
1242                                 {
1243                                 X509_STORE_CTX_cleanup(&xs_ctx);
1244                                 return 0;
1245                                 }
1246                         }
1247                 X509_STORE_CTX_cleanup(&xs_ctx);
1248                 }
1249         else
1250                 {
1251                 i = ssl_security_cert_chain(s, extra_certs, x, 0);
1252                 if (i != 1)
1253                         {
1254                         SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1255                         return 0;
1256                         }
1257                 if (!ssl_add_cert_to_buf(buf, l, x))
1258                         return 0;
1259                 for (i=0; i<sk_X509_num(extra_certs); i++)
1260                         {
1261                         x=sk_X509_value(extra_certs,i);
1262                         if (!ssl_add_cert_to_buf(buf, l, x))
1263                                 return 0;
1264                         }
1265                 }
1266         return 1;
1267         }
1268
1269 /* Build a certificate chain for current certificate */
1270 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
1271         {
1272         CERT *c = s ? s->cert : ctx->cert;
1273         CERT_PKEY *cpk = c->key;
1274         X509_STORE *chain_store = NULL;
1275         X509_STORE_CTX xs_ctx;
1276         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1277         X509 *x;
1278         int i, rv = 0;
1279         unsigned long error;
1280
1281         if (!cpk->x509)
1282                 {
1283                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1284                 goto err;
1285                 }
1286         /* Rearranging and check the chain: add everything to a store */
1287         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1288                 {
1289                 chain_store = X509_STORE_new();
1290                 if (!chain_store)
1291                         goto err;
1292                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1293                         {
1294                         x = sk_X509_value(cpk->chain, i);
1295                         if (!X509_STORE_add_cert(chain_store, x))
1296                                 {
1297                                 error = ERR_peek_last_error();
1298                                 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1299                                     ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1300                                         goto err;
1301                                 ERR_clear_error();
1302                                 }
1303                         }
1304                 /* Add EE cert too: it might be self signed */
1305                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1306                         {
1307                         error = ERR_peek_last_error();
1308                         if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1309                             ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1310                                 goto err;
1311                         ERR_clear_error();
1312                         }
1313                 }
1314         else
1315                 {
1316                 if (c->chain_store)
1317                         chain_store = c->chain_store;
1318                 else if (s)
1319                         chain_store = s->ctx->cert_store;
1320                 else
1321                         chain_store = ctx->cert_store;
1322
1323                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1324                         untrusted = cpk->chain;
1325                 }
1326
1327         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1328                 {
1329                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1330                 goto err;
1331                 }
1332         /* Set suite B flags if needed */
1333         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1334
1335         i = X509_verify_cert(&xs_ctx);
1336         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1337                 {
1338                 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1339                         ERR_clear_error();
1340                 i = 1;
1341                 rv = 2;
1342                 }
1343         if (i > 0)
1344                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1345         if (i <= 0)
1346                 {
1347                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1348                 i = X509_STORE_CTX_get_error(&xs_ctx);
1349                 ERR_add_error_data(2, "Verify error:",
1350                                         X509_verify_cert_error_string(i));
1351
1352                 X509_STORE_CTX_cleanup(&xs_ctx);
1353                 goto err;
1354                 }
1355         X509_STORE_CTX_cleanup(&xs_ctx);
1356         /* Remove EE certificate from chain */
1357         x = sk_X509_shift(chain);
1358         X509_free(x);
1359         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1360                 {
1361                 if (sk_X509_num(chain) > 0)
1362                         {
1363                         /* See if last cert is self signed */
1364                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1365                         X509_check_purpose(x, -1, 0);
1366                         if (x->ex_flags & EXFLAG_SS)
1367                                 {
1368                                 x = sk_X509_pop(chain);
1369                                 X509_free(x);
1370                                 }
1371                         }
1372                 }
1373         /* Check security level of all CA certificates: EE will have been
1374          * checked already.
1375          */
1376         for (i = 0; i < sk_X509_num(chain); i++)
1377                 {
1378                 x = sk_X509_value(chain, i);
1379                 rv = ssl_security_cert(s, ctx, x, 0, 0);
1380                 if (rv != 1)
1381                         {
1382                         SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1383                         sk_X509_pop_free(chain, X509_free);
1384                         rv = 0;
1385                         goto err;
1386                         }
1387                 }
1388         if (cpk->chain)
1389                 sk_X509_pop_free(cpk->chain, X509_free);
1390         cpk->chain = chain;
1391         if (rv == 0)
1392                 rv = 1;
1393         err:
1394         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1395                 X509_STORE_free(chain_store);
1396
1397         return rv;
1398         }
1399
1400 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1401         {
1402         X509_STORE **pstore;
1403         if (chain)
1404                 pstore = &c->chain_store;
1405         else
1406                 pstore = &c->verify_store;
1407         if (*pstore)
1408                 X509_STORE_free(*pstore);
1409         *pstore = store;
1410         if (ref && store)
1411                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1412         return 1;
1413         }
1414
1415 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
1416         {
1417         int level, minbits;
1418         static const int minbits_table[5] = {80, 112, 128, 192, 256};
1419         if (ctx)
1420                 level = SSL_CTX_get_security_level(ctx);
1421         else
1422                 level = SSL_get_security_level(s);
1423         /* Level 0: anything goes */
1424         if (level <= 0)
1425                 return 1;
1426         if (level > 5)
1427                 level = 5;
1428         minbits = minbits_table[level - 1];
1429         switch (op)
1430                 {
1431         case SSL_SECOP_CIPHER_SUPPORTED:
1432         case SSL_SECOP_CIPHER_SHARED:
1433         case SSL_SECOP_CIPHER_CHECK:
1434                 {
1435                 const SSL_CIPHER *c = other;
1436                 /* No ciphers below security level */
1437                 if (bits < minbits)
1438                         return 0;
1439                 /* No SSLv2 ciphers */
1440                 if ((SSL_CIPHER_get_id(c) >> 24) == 0x2)
1441                         return 0;
1442                 /* No unauthenticated ciphersuites */
1443                 if (c->algorithm_auth & SSL_aNULL)
1444                         return 0;
1445                 /* No MD5 mac ciphersuites */
1446                 if (c->algorithm_mac & SSL_MD5)
1447                         return 0;
1448                 /* SHA1 HMAC is 160 bits of security */
1449                 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1450                         return 0;
1451                 /* Level 2: no RC4 */
1452                 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1453                         return 0;
1454                 /* Level 3: forward secure ciphersuites only */
1455                 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH|SSL_kEECDH)))
1456                         return 0;
1457                 break;
1458                 }
1459         case SSL_SECOP_VERSION:
1460                 /* SSLv2 allowed only on level zero */
1461                 if (nid == SSL2_VERSION)
1462                         return 0;
1463                 /* SSLv3 not allowed on level 2 */
1464                 if (nid <= SSL3_VERSION && level >= 2)
1465                         return 0;
1466                 /* TLS v1.1 and above only for level 3 */
1467                 if (nid <= TLS1_VERSION && level >= 3)
1468                         return 0;
1469                 /* TLS v1.2 only for level 4 and above */
1470                 if (nid <= TLS1_1_VERSION && level >= 4)
1471                         return 0;
1472                 break;
1473
1474         case SSL_SECOP_COMPRESSION:
1475                 if (level >= 2)
1476                         return 0;
1477                 break;
1478         case SSL_SECOP_TICKET:
1479                 if (level >= 3)
1480                         return 0;
1481                 break;
1482         case SSL_SECOP_SSL2_COMPAT:
1483                 /* SSLv2 compatible client hello only for level zero */
1484                 return 0;
1485         default:
1486                 if (bits < minbits)
1487                         return 0;
1488                 }
1489         return 1;
1490         }
1491
1492 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1493         {
1494         return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1495         }
1496
1497 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1498         {
1499         return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, ctx->cert->sec_ex);
1500         }