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