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