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         return(ret);
 427
 428 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 429 err:
 430 #endif
 431 #ifndef OPENSSL_NO_RSA
 432         if (ret->rsa_tmp != NULL)
 433                 RSA_free(ret->rsa_tmp);
 434 #endif
 435 #ifndef OPENSSL_NO_DH
 436         if (ret->dh_tmp != NULL)
 437                 DH_free(ret->dh_tmp);
 438 #endif
 439 #ifndef OPENSSL_NO_ECDH
 440         if (ret->ecdh_tmp != NULL)
 441                 EC_KEY_free(ret->ecdh_tmp);
 442 #endif
 443
 444         ssl_cert_clear_certs(ret);
 445
 446         return NULL;
 447         }
 448
 449 /* Free up and clear all certificates and chains */
 450
 451 void ssl_cert_clear_certs(CERT *c)
 452         {
 453         int i;
 454         if (c == NULL)
 455                 return;
 456         for (i = 0; i<SSL_PKEY_NUM; i++)
 457                 {
 458                 CERT_PKEY *cpk = c->pkeys + i;
 459                 if (cpk->x509)
 460                         {
 461                         X509_free(cpk->x509);
 462                         cpk->x509 = NULL;
 463                         }
 464                 if (cpk->privatekey)
 465                         {
 466                         EVP_PKEY_free(cpk->privatekey);
 467                         cpk->privatekey = NULL;
 468                         }
 469                 if (cpk->chain)
 470                         {
 471                         sk_X509_pop_free(cpk->chain, X509_free);
 472                         cpk->chain = NULL;
 473                         }
 474 #ifndef OPENSSL_NO_TLSEXT
 475                 if (cpk->serverinfo)
 476                         {
 477                         OPENSSL_free(cpk->serverinfo);
 478                         cpk->serverinfo = NULL;
 479                         cpk->serverinfo_length = 0;
 480                         }
 481 #endif
 482                 /* Clear all flags apart from explicit sign */
 483                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
 484                 }
 485         }
 486
 487 void ssl_cert_free(CERT *c)
 488         {
 489         int i;
 490
 491         if(c == NULL)
 492             return;
 493
 494         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
 495 #ifdef REF_PRINT
 496         REF_PRINT("CERT",c);
 497 #endif
 498         if (i > 0) return;
 499 #ifdef REF_CHECK
 500         if (i < 0)
 501                 {
 502                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
 503                 abort(); /* ok */
 504                 }
 505 #endif
 506
 507 #ifndef OPENSSL_NO_RSA
 508         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 509 #endif
 510 #ifndef OPENSSL_NO_DH
 511         if (c->dh_tmp) DH_free(c->dh_tmp);
 512 #endif
 513 #ifndef OPENSSL_NO_ECDH
 514         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 515 #endif
 516
 517         ssl_cert_clear_certs(c);
 518         if (c->peer_sigalgs)
 519                 OPENSSL_free(c->peer_sigalgs);
 520         if (c->conf_sigalgs)
 521                 OPENSSL_free(c->conf_sigalgs);
 522         if (c->client_sigalgs)
 523                 OPENSSL_free(c->client_sigalgs);
 524         if (c->shared_sigalgs)
 525                 OPENSSL_free(c->shared_sigalgs);
 526         if (c->ctypes)
 527                 OPENSSL_free(c->ctypes);
 528         if (c->verify_store)
 529                 X509_STORE_free(c->verify_store);
 530         if (c->chain_store)
 531                 X509_STORE_free(c->chain_store);
 532         if (c->ciphers_raw)
 533                 OPENSSL_free(c->ciphers_raw);
 534         OPENSSL_free(c);
 535         }
 536
 537 int ssl_cert_inst(CERT **o)
 538         {
 539         /* Create a CERT if there isn't already one
 540          * (which cannot really happen, as it is initially created in
 541          * SSL_CTX_new; but the earlier code usually allows for that one
 542          * being non-existant, so we follow that behaviour, as it might
 543          * turn out that there actually is a reason for it -- but I'm
 544          * not sure that *all* of the existing code could cope with
 545          * s->cert being NULL, otherwise we could do without the
 546          * initialization in SSL_CTX_new).
 547          */
 548
 549         if (o == NULL)
 550                 {
 551                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
 552                 return(0);
 553                 }
 554         if (*o == NULL)
 555                 {
 556                 if ((*o = ssl_cert_new()) == NULL)
 557                         {
 558                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
 559                         return(0);
 560                         }
 561                 }
 562         return(1);
 563         }
 564
 565 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
 566         {
 567         int i, r;
 568         CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
 569         if (!cpk)
 570                 return 0;
 571         if (cpk->chain)
 572                 sk_X509_pop_free(cpk->chain, X509_free);
 573         for (i = 0; i < sk_X509_num(chain); i++)
 574                 {
 575                 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
 576                 if (r != 1)
 577                         {
 578                         SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
 579                         return 0;
 580                         }
 581                 }
 582         cpk->chain = chain;
 583         return 1;
 584         }
 585
 586 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
 587         {
 588         STACK_OF(X509) *dchain;
 589         if (!chain)
 590                 return ssl_cert_set0_chain(s, ctx, NULL);
 591         dchain = X509_chain_up_ref(chain);
 592         if (!dchain)
 593                 return 0;
 594         if (!ssl_cert_set0_chain(s, ctx, dchain))
 595                 {
 596                 sk_X509_pop_free(dchain, X509_free);
 597                 return 0;
 598                 }
 599         return 1;
 600         }
 601
 602 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
 603         {
 604         int r;
 605         CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
 606         if (!cpk)
 607                 return 0;
 608         r = ssl_security_cert(s, ctx, x, 0, 0);
 609         if (r != 1)
 610                 {
 611                 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
 612                 return 0;
 613                 }
 614         if (!cpk->chain)
 615                 cpk->chain = sk_X509_new_null();
 616         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
 617                 return 0;
 618         return 1;
 619         }
 620
 621 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
 622         {
 623         if (!ssl_cert_add0_chain_cert(s, ctx, x))
 624                 return 0;
 625         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 626         return 1;
 627         }
 628
 629 int ssl_cert_select_current(CERT *c, X509 *x)
 630         {
 631         int i;
 632         if (x == NULL)
 633                 return 0;
 634         for (i = 0; i < SSL_PKEY_NUM; i++)
 635                 {
 636                 CERT_PKEY *cpk = c->pkeys + i;
 637                 if (cpk->x509 == x && cpk->privatekey)
 638                         {
 639                         c->key = cpk;
 640                         return 1;
 641                         }
 642                 }
 643
 644         for (i = 0; i < SSL_PKEY_NUM; i++)
 645                 {
 646                 CERT_PKEY *cpk = c->pkeys + i;
 647                 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
 648                         {
 649                         c->key = cpk;
 650                         return 1;
 651                         }
 652                 }
 653         return 0;
 654         }
 655
 656 int ssl_cert_set_current(CERT *c, long op)
 657         {
 658         int i, idx;
 659         if (!c)
 660                 return 0;
 661         if (op == SSL_CERT_SET_FIRST)
 662                 idx = 0;
 663         else if (op == SSL_CERT_SET_NEXT)
 664                 {
 665                 idx = (int)(c->key - c->pkeys + 1);
 666                 if (idx >= SSL_PKEY_NUM)
 667                         return 0;
 668                 }
 669         else
 670                 return 0;
 671         for (i = idx; i < SSL_PKEY_NUM; i++)
 672                 {
 673                 CERT_PKEY *cpk = c->pkeys + i;
 674                 if (cpk->x509 && cpk->privatekey)
 675                         {
 676                         c->key = cpk;
 677                         return 1;
 678                         }
 679                 }
 680         return 0;
 681         }
 682
 683 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
 684         {
 685         c->cert_cb = cb;
 686         c->cert_cb_arg = arg;
 687         }
 688
 689 SESS_CERT *ssl_sess_cert_new(void)
 690         {
 691         SESS_CERT *ret;
 692
 693         ret = OPENSSL_malloc(sizeof *ret);
 694         if (ret == NULL)
 695                 {
 696                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
 697                 return NULL;
 698                 }
 699
 700         memset(ret, 0 ,sizeof *ret);
 701         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
 702         ret->references = 1;
 703
 704         return ret;
 705         }
 706
 707 void ssl_sess_cert_free(SESS_CERT *sc)
 708         {
 709         int i;
 710
 711         if (sc == NULL)
 712                 return;
 713
 714         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
 715 #ifdef REF_PRINT
 716         REF_PRINT("SESS_CERT", sc);
 717 #endif
 718         if (i > 0)
 719                 return;
 720 #ifdef REF_CHECK
 721         if (i < 0)
 722                 {
 723                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
 724                 abort(); /* ok */
 725                 }
 726 #endif
 727
 728         /* i == 0 */
 729         if (sc->cert_chain != NULL)
 730                 sk_X509_pop_free(sc->cert_chain, X509_free);
 731         for (i = 0; i < SSL_PKEY_NUM; i++)
 732                 {
 733                 if (sc->peer_pkeys[i].x509 != NULL)
 734                         X509_free(sc->peer_pkeys[i].x509);
 735 #if 0 /* We don't have the peer's private key.  These lines are just
 736            * here as a reminder that we're still using a not-quite-appropriate
 737            * data structure. */
 738                 if (sc->peer_pkeys[i].privatekey != NULL)
 739                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
 740 #endif
 741                 }
 742
 743 #ifndef OPENSSL_NO_RSA
 744         if (sc->peer_rsa_tmp != NULL)
 745                 RSA_free(sc->peer_rsa_tmp);
 746 #endif
 747 #ifndef OPENSSL_NO_DH
 748         if (sc->peer_dh_tmp != NULL)
 749                 DH_free(sc->peer_dh_tmp);
 750 #endif
 751 #ifndef OPENSSL_NO_ECDH
 752         if (sc->peer_ecdh_tmp != NULL)
 753                 EC_KEY_free(sc->peer_ecdh_tmp);
 754 #endif
 755
 756         OPENSSL_free(sc);
 757         }
 758
 759 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 760         {
 761         sc->peer_cert_type = type;
 762         return(1);
 763         }
 764
 765 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
 766         {
 767         X509 *x;
 768         int i;
 769         X509_STORE *verify_store;
 770         X509_STORE_CTX ctx;
 771
 772         if (s->cert->verify_store)
 773                 verify_store = s->cert->verify_store;
 774         else
 775                 verify_store = s->ctx->cert_store;
 776
 777         if ((sk == NULL) || (sk_X509_num(sk) == 0))
 778                 return(0);
 779
 780         x=sk_X509_value(sk,0);
 781         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
 782                 {
 783                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
 784                 return(0);
 785                 }
 786         /* Set suite B flags if needed */
 787         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
 788 #if 0
 789         if (SSL_get_verify_depth(s) >= 0)
 790                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
 791 #endif
 792         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
 793
 794         /* We need to inherit the verify parameters. These can be determined by
 795          * the context: if its a server it will verify SSL client certificates
 796          * or vice versa.
 797          */
 798
 799         X509_STORE_CTX_set_default(&ctx,
 800                                 s->server ? "ssl_client" : "ssl_server");
 801         /* Anything non-default in "param" should overwrite anything in the
 802          * ctx.
 803          */
 804         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
 805
 806         if (s->verify_callback)
 807                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 808
 809         if (s->ctx->app_verify_callback != NULL)
 810 #if 1 /* new with OpenSSL 0.9.7 */
 811                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
 812 #else
 813                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
 814 #endif
 815         else
 816                 {
 817 #ifndef OPENSSL_NO_X509_VERIFY
 818                 i=X509_verify_cert(&ctx);
 819 #if 0
 820                 /* Dummy error calls so mkerr generates them */
 821                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_EE_KEY_TOO_SMALL);
 822                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_CA_KEY_TOO_SMALL);
 823                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_CA_MD_TOO_WEAK);
 824 #endif
 825                 if (i > 0)
 826                         i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
 827 #else
 828                 i=0;
 829                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
 830                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
 831 #endif
 832                 }
 833
 834         s->verify_result=ctx.error;
 835         X509_STORE_CTX_cleanup(&ctx);
 836
 837         return(i);
 838         }
 839
 840 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
 841         {
 842         if (*ca_list != NULL)
 843                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 844
 845         *ca_list=name_list;
 846         }
 847
 848 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
 849         {
 850         int i;
 851         STACK_OF(X509_NAME) *ret;
 852         X509_NAME *name;
 853
 854         ret=sk_X509_NAME_new_null();
 855         for (i=0; i<sk_X509_NAME_num(sk); i++)
 856                 {
 857                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
 858                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
 859                         {
 860                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
 861                         return(NULL);
 862                         }
 863                 }
 864         return(ret);
 865         }
 866
 867 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
 868         {
 869         set_client_CA_list(&(s->client_CA),name_list);
 870         }
 871
 872 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
 873         {
 874         set_client_CA_list(&(ctx->client_CA),name_list);
 875         }
 876
 877 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
 878         {
 879         return(ctx->client_CA);
 880         }
 881
 882 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
 883         {
 884         if (s->type == SSL_ST_CONNECT)
 885                 { /* we are in the client */
 886                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
 887                         (s->s3 != NULL))
 888                         return(s->s3->tmp.ca_names);
 889                 else
 890                         return(NULL);
 891                 }
 892         else
 893                 {
 894                 if (s->client_CA != NULL)
 895                         return(s->client_CA);
 896                 else
 897                         return(s->ctx->client_CA);
 898                 }
 899         }
 900
 901 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
 902         {
 903         X509_NAME *name;
 904
 905         if (x == NULL) return(0);
 906         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
 907                 return(0);
 908
 909         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
 910                 return(0);
 911
 912         if (!sk_X509_NAME_push(*sk,name))
 913                 {
 914                 X509_NAME_free(name);
 915                 return(0);
 916                 }
 917         return(1);
 918         }
 919
 920 int SSL_add_client_CA(SSL *ssl,X509 *x)
 921         {
 922         return(add_client_CA(&(ssl->client_CA),x));
 923         }
 924
 925 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
 926         {
 927         return(add_client_CA(&(ctx->client_CA),x));
 928         }
 929
 930 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
 931         {
 932         return(X509_NAME_cmp(*a,*b));
 933         }
 934
 935 #ifndef OPENSSL_NO_STDIO
 936 /*!
 937  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
 938  * it doesn't really have anything to do with clients (except that a common use
 939  * for a stack of CAs is to send it to the client). Actually, it doesn't have
 940  * much to do with CAs, either, since it will load any old cert.
 941  * \param file the file containing one or more certs.
 942  * \return a ::STACK containing the certs.
 943  */
 944 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 945         {
 946         BIO *in;
 947         X509 *x=NULL;
 948         X509_NAME *xn=NULL;
 949         STACK_OF(X509_NAME) *ret = NULL,*sk;
 950
 951         sk=sk_X509_NAME_new(xname_cmp);
 952
 953         in=BIO_new(BIO_s_file_internal());
 954
 955         if ((sk == NULL) || (in == NULL))
 956                 {
 957                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 958                 goto err;
 959                 }
 960
 961         if (!BIO_read_filename(in,file))
 962                 goto err;
 963
 964         for (;;)
 965                 {
 966                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
 967                         break;
 968                 if (ret == NULL)
 969                         {
 970                         ret = sk_X509_NAME_new_null();
 971                         if (ret == NULL)
 972                                 {
 973                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
 974                                 goto err;
 975                                 }
 976                         }
 977                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
 978                 /* check for duplicates */
 979                 xn=X509_NAME_dup(xn);
 980                 if (xn == NULL) goto err;
 981                 if (sk_X509_NAME_find(sk,xn) >= 0)
 982                         X509_NAME_free(xn);
 983                 else
 984                         {
 985                         sk_X509_NAME_push(sk,xn);
 986                         sk_X509_NAME_push(ret,xn);
 987                         }
 988                 }
 989
 990         if (0)
 991                 {
 992 err:
 993                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
 994                 ret=NULL;
 995                 }
 996         if (sk != NULL) sk_X509_NAME_free(sk);
 997         if (in != NULL) BIO_free(in);
 998         if (x != NULL) X509_free(x);
 999         if (ret != NULL)
1000                 ERR_clear_error();
1001         return(ret);
1002         }
1003 #endif
1004
1005 /*!
1006  * Add a file of certs to a stack.
1007  * \param stack the stack to add to.
1008  * \param file the file to add from. All certs in this file that are not
1009  * already in the stack will be added.
1010  * \return 1 for success, 0 for failure. Note that in the case of failure some
1011  * certs may have been added to \c stack.
1012  */
1013
1014 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1015                                         const char *file)
1016         {
1017         BIO *in;
1018         X509 *x=NULL;
1019         X509_NAME *xn=NULL;
1020         int ret=1;
1021         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1022
1023         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1024
1025         in=BIO_new(BIO_s_file_internal());
1026
1027         if (in == NULL)
1028                 {
1029                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1030                 goto err;
1031                 }
1032
1033         if (!BIO_read_filename(in,file))
1034                 goto err;
1035
1036         for (;;)
1037                 {
1038                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1039                         break;
1040                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1041                 xn=X509_NAME_dup(xn);
1042                 if (xn == NULL) goto err;
1043                 if (sk_X509_NAME_find(stack,xn) >= 0)
1044                         X509_NAME_free(xn);
1045                 else
1046                         sk_X509_NAME_push(stack,xn);
1047                 }
1048
1049         ERR_clear_error();
1050
1051         if (0)
1052                 {
1053 err:
1054                 ret=0;
1055                 }
1056         if(in != NULL)
1057                 BIO_free(in);
1058         if(x != NULL)
1059                 X509_free(x);
1060
1061         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1062
1063         return ret;
1064         }
1065
1066 /*!
1067  * Add a directory of certs to a stack.
1068  * \param stack the stack to append to.
1069  * \param dir the directory to append from. All files in this directory will be
1070  * examined as potential certs. Any that are acceptable to
1071  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1072  * included.
1073  * \return 1 for success, 0 for failure. Note that in the case of failure some
1074  * certs may have been added to \c stack.
1075  */
1076
1077 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1078                                        const char *dir)
1079         {
1080         OPENSSL_DIR_CTX *d = NULL;
1081         const char *filename;
1082         int ret = 0;
1083
1084         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1085
1086         /* Note that a side effect is that the CAs will be sorted by name */
1087
1088         while((filename = OPENSSL_DIR_read(&d, dir)))
1089                 {
1090                 char buf[1024];
1091                 int r;
1092
1093                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1094                         {
1095                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1096                         goto err;
1097                         }
1098
1099 #ifdef OPENSSL_SYS_VMS
1100                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1101 #else
1102                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1103 #endif
1104                 if (r <= 0 || r >= (int)sizeof(buf))
1105                         goto err;
1106                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1107                         goto err;
1108                 }
1109
1110         if (errno)
1111                 {
1112                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1113                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1114                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1115                 goto err;
1116                 }
1117
1118         ret = 1;
1119
1120 err:
1121         if (d) OPENSSL_DIR_end(&d);
1122         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1123         return ret;
1124         }
1125
1126 /* Add a certificate to a BUF_MEM structure */
1127
1128 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1129         {
1130         int n;
1131         unsigned char *p;
1132
1133         n=i2d_X509(x,NULL);
1134         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1135                 {
1136                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1137                 return 0;
1138                 }
1139         p=(unsigned char *)&(buf->data[*l]);
1140         l2n3(n,p);
1141         i2d_X509(x,&p);
1142         *l+=n+3;
1143
1144         return 1;
1145         }
1146
1147 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1148 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1149         {
1150         BUF_MEM *buf = s->init_buf;
1151         int i;
1152
1153         X509 *x;
1154         STACK_OF(X509) *extra_certs;
1155         X509_STORE *chain_store;
1156
1157         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1158         if (!BUF_MEM_grow_clean(buf,10))
1159                 {
1160                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1161                 return 0;
1162                 }
1163
1164         if (!cpk || !cpk->x509)
1165                 return 1;
1166
1167         x = cpk->x509;
1168
1169         /* If we have a certificate specific chain use it, else use
1170          * parent ctx.
1171          */
1172         if (cpk->chain)
1173                 extra_certs = cpk->chain;
1174         else
1175                 extra_certs = s->ctx->extra_certs;
1176
1177         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1178                 chain_store = NULL;
1179         else if (s->cert->chain_store)
1180                 chain_store = s->cert->chain_store;
1181         else
1182                 chain_store = s->ctx->cert_store;
1183
1184         if (chain_store)
1185                 {
1186                 X509_STORE_CTX xs_ctx;
1187
1188                 if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1189                         {
1190                         SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1191                         return(0);
1192                         }
1193                 X509_verify_cert(&xs_ctx);
1194                 /* Don't leave errors in the queue */
1195                 ERR_clear_error();
1196                 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
1197                 if (i != 1)
1198                         {
1199                         X509_STORE_CTX_cleanup(&xs_ctx);
1200                         SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1201                         return 0;
1202                         }
1203                 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1204                         {
1205                         x = sk_X509_value(xs_ctx.chain, i);
1206
1207                         if (!ssl_add_cert_to_buf(buf, l, x))
1208                                 {
1209                                 X509_STORE_CTX_cleanup(&xs_ctx);
1210                                 return 0;
1211                                 }
1212                         }
1213                 X509_STORE_CTX_cleanup(&xs_ctx);
1214                 }
1215         else
1216                 {
1217                 i = ssl_security_cert_chain(s, extra_certs, x, 0);
1218                 if (i != 1)
1219                         {
1220                         SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1221                         return 0;
1222                         }
1223                 if (!ssl_add_cert_to_buf(buf, l, x))
1224                         return 0;
1225                 for (i=0; i<sk_X509_num(extra_certs); i++)
1226                         {
1227                         x=sk_X509_value(extra_certs,i);
1228                         if (!ssl_add_cert_to_buf(buf, l, x))
1229                                 return 0;
1230                         }
1231                 }
1232         return 1;
1233         }
1234
1235 /* Build a certificate chain for current certificate */
1236 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
1237         {
1238         CERT *c = s ? s->cert : ctx->cert;
1239         CERT_PKEY *cpk = c->key;
1240         X509_STORE *chain_store = NULL;
1241         X509_STORE_CTX xs_ctx;
1242         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1243         X509 *x;
1244         int i, rv = 0;
1245         unsigned long error;
1246
1247         if (!cpk->x509)
1248                 {
1249                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1250                 goto err;
1251                 }
1252         /* Rearranging and check the chain: add everything to a store */
1253         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1254                 {
1255                 chain_store = X509_STORE_new();
1256                 if (!chain_store)
1257                         goto err;
1258                 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1259                         {
1260                         x = sk_X509_value(cpk->chain, i);
1261                         if (!X509_STORE_add_cert(chain_store, x))
1262                                 {
1263                                 error = ERR_peek_last_error();
1264                                 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1265                                     ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1266                                         goto err;
1267                                 ERR_clear_error();
1268                                 }
1269                         }
1270                 /* Add EE cert too: it might be self signed */
1271                 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1272                         {
1273                         error = ERR_peek_last_error();
1274                         if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1275                             ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1276                                 goto err;
1277                         ERR_clear_error();
1278                         }
1279                 }
1280         else
1281                 {
1282                 if (c->chain_store)
1283                         chain_store = c->chain_store;
1284                 else if (s)
1285                         chain_store = s->ctx->cert_store;
1286                 else
1287                         chain_store = ctx->cert_store;
1288
1289                 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1290                         untrusted = cpk->chain;
1291                 }
1292
1293         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1294                 {
1295                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1296                 goto err;
1297                 }
1298         /* Set suite B flags if needed */
1299         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1300
1301         i = X509_verify_cert(&xs_ctx);
1302         if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1303                 {
1304                 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1305                         ERR_clear_error();
1306                 i = 1;
1307                 rv = 2;
1308                 }
1309         if (i > 0)
1310                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1311         if (i <= 0)
1312                 {
1313                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1314                 i = X509_STORE_CTX_get_error(&xs_ctx);
1315                 ERR_add_error_data(2, "Verify error:",
1316                                         X509_verify_cert_error_string(i));
1317
1318                 X509_STORE_CTX_cleanup(&xs_ctx);
1319                 goto err;
1320                 }
1321         X509_STORE_CTX_cleanup(&xs_ctx);
1322         /* Remove EE certificate from chain */
1323         x = sk_X509_shift(chain);
1324         X509_free(x);
1325         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1326                 {
1327                 if (sk_X509_num(chain) > 0)
1328                         {
1329                         /* See if last cert is self signed */
1330                         x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1331                         X509_check_purpose(x, -1, 0);
1332                         if (x->ex_flags & EXFLAG_SS)
1333                                 {
1334                                 x = sk_X509_pop(chain);
1335                                 X509_free(x);
1336                                 }
1337                         }
1338                 }
1339         /* Check security level of all CA certificates: EE will have been
1340          * checked already.
1341          */
1342         for (i = 0; i < sk_X509_num(chain); i++)
1343                 {
1344                 x = sk_X509_value(chain, i);
1345                 rv = ssl_security_cert(s, ctx, x, 0, 0);
1346                 if (rv != 1)
1347                         {
1348                         SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1349                         sk_X509_pop_free(chain, X509_free);
1350                         rv = 0;
1351                         goto err;
1352                         }
1353                 }
1354         if (cpk->chain)
1355                 sk_X509_pop_free(cpk->chain, X509_free);
1356         cpk->chain = chain;
1357         if (rv == 0)
1358                 rv = 1;
1359         err:
1360         if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1361                 X509_STORE_free(chain_store);
1362
1363         return rv;
1364         }
1365
1366 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1367         {
1368         X509_STORE **pstore;
1369         if (chain)
1370                 pstore = &c->chain_store;
1371         else
1372                 pstore = &c->verify_store;
1373         if (*pstore)
1374                 X509_STORE_free(*pstore);
1375         *pstore = store;
1376         if (ref && store)
1377                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1378         return 1;
1379         }
1380
1381 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
1382         {
1383         int level, minbits;
1384         static const int minbits_table[5] = {80, 112, 128, 192, 256};
1385         if (ctx)
1386                 level = SSL_CTX_get_security_level(ctx);
1387         else
1388                 level = SSL_get_security_level(s);
1389         /* Level 0: anything goes */
1390         if (level <= 0)
1391                 return 1;
1392         if (level > 5)
1393                 level = 5;
1394         minbits = minbits_table[level - 1];
1395         switch (op)
1396                 {
1397         case SSL_SECOP_CIPHER_SUPPORTED:
1398         case SSL_SECOP_CIPHER_SHARED:
1399         case SSL_SECOP_CIPHER_CHECK:
1400                 {
1401                 const SSL_CIPHER *c = other;
1402                 /* No ciphers below security level */
1403                 if (bits < minbits)
1404                         return 0;
1405                 /* No SSLv2 ciphers */
1406                 if ((SSL_CIPHER_get_id(c) >> 24) == 0x2)
1407                         return 0;
1408                 /* No unauthenticated ciphersuites */
1409                 if (c->algorithm_auth & SSL_aNULL)
1410                         return 0;
1411                 /* No MD5 mac ciphersuites */
1412                 if (c->algorithm_mac & SSL_MD5)
1413                         return 0;
1414                 /* SHA1 HMAC is 160 bits of security */
1415                 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1416                         return 0;
1417                 /* Level 2: no RC4 */
1418                 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1419                         return 0;
1420                 /* Level 3: forward secure ciphersuites only */
1421                 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH|SSL_kEECDH)))
1422                         return 0;
1423                 break;
1424                 }
1425         case SSL_SECOP_VERSION:
1426                 /* SSLv2 allowed only on level zero */
1427                 if (nid == SSL2_VERSION)
1428                         return 0;
1429                 /* SSLv3 not allowed on level 2 */
1430                 if (nid <= SSL3_VERSION && level >= 2)
1431                         return 0;
1432                 /* TLS v1.1 and above only for level 3 */
1433                 if (nid <= TLS1_VERSION && level >= 3)
1434                         return 0;
1435                 /* TLS v1.2 only for level 4 and above */
1436                 if (nid <= TLS1_1_VERSION && level >= 4)
1437                         return 0;
1438                 break;
1439
1440         case SSL_SECOP_COMPRESSION:
1441                 if (level >= 2)
1442                         return 0;
1443                 break;
1444         case SSL_SECOP_TICKET:
1445                 if (level >= 3)
1446                         return 0;
1447                 break;
1448         case SSL_SECOP_SSL2_COMPAT:
1449                 /* SSLv2 compatible client hello only for level zero */
1450                 return 0;
1451         default:
1452                 if (bits < minbits)
1453                         return 0;
1454                 }
1455         return 1;
1456         }
1457
1458 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1459         {
1460         return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1461         }
1462
1463 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1464         {
1465         return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, ctx->cert->sec_ex);
1466         }