apps/s_cb.c

   1 /* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
   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) 1998-2006 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 #include <stdio.h>
 113 #include <stdlib.h>
 114 #define USE_SOCKETS
 115 #define NON_MAIN
 116 #include "apps.h"
 117 #undef NON_MAIN
 118 #undef USE_SOCKETS
 119 #include <openssl/err.h>
 120 #include <openssl/rand.h>
 121 #include <openssl/x509.h>
 122 #include <openssl/ssl.h>
 123 #include "s_apps.h"
 124
 125 #define COOKIE_SECRET_LENGTH    16
 126
 127 int verify_depth=0;
 128 int verify_error=X509_V_OK;
 129 int verify_return_error=0;
 130 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 131 int cookie_initialized=0;
 132
 133 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 134         {
 135         X509 *err_cert;
 136         int err,depth;
 137
 138         err_cert=X509_STORE_CTX_get_current_cert(ctx);
 139         err=    X509_STORE_CTX_get_error(ctx);
 140         depth=  X509_STORE_CTX_get_error_depth(ctx);
 141
 142         BIO_printf(bio_err,"depth=%d ",depth);
 143         if (err_cert)
 144                 {
 145                 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
 146                                         0, XN_FLAG_ONELINE);
 147                 BIO_puts(bio_err, "\n");
 148                 }
 149         else
 150                 BIO_puts(bio_err, "<no cert>\n");
 151         if (!ok)
 152                 {
 153                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 154                         X509_verify_cert_error_string(err));
 155                 if (verify_depth >= depth)
 156                         {
 157                         if (!verify_return_error)
 158                                 ok=1;
 159                         verify_error=X509_V_OK;
 160                         }
 161                 else
 162                         {
 163                         ok=0;
 164                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
 165                         }
 166                 }
 167         switch (err)
 168                 {
 169         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 170                 BIO_puts(bio_err,"issuer= ");
 171                 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
 172                                         0, XN_FLAG_ONELINE);
 173                 BIO_puts(bio_err, "\n");
 174                 break;
 175         case X509_V_ERR_CERT_NOT_YET_VALID:
 176         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 177                 BIO_printf(bio_err,"notBefore=");
 178                 ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
 179                 BIO_printf(bio_err,"\n");
 180                 break;
 181         case X509_V_ERR_CERT_HAS_EXPIRED:
 182         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 183                 BIO_printf(bio_err,"notAfter=");
 184                 ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
 185                 BIO_printf(bio_err,"\n");
 186                 break;
 187         case X509_V_ERR_NO_EXPLICIT_POLICY:
 188                 policies_print(bio_err, ctx);
 189                 break;
 190                 }
 191         if (err == X509_V_OK && ok == 2)
 192                 policies_print(bio_err, ctx);
 193
 194         BIO_printf(bio_err,"verify return:%d\n",ok);
 195         return(ok);
 196         }
 197
 198 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 199         {
 200         if (cert_file != NULL)
 201                 {
 202                 /*
 203                 SSL *ssl;
 204                 X509 *x509;
 205                 */
 206
 207                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
 208                         SSL_FILETYPE_PEM) <= 0)
 209                         {
 210                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
 211                         ERR_print_errors(bio_err);
 212                         return(0);
 213                         }
 214                 if (key_file == NULL) key_file=cert_file;
 215                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
 216                         SSL_FILETYPE_PEM) <= 0)
 217                         {
 218                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
 219                         ERR_print_errors(bio_err);
 220                         return(0);
 221                         }
 222
 223                 /*
 224                 In theory this is no longer needed
 225                 ssl=SSL_new(ctx);
 226                 x509=SSL_get_certificate(ssl);
 227
 228                 if (x509 != NULL) {
 229                         EVP_PKEY *pktmp;
 230                         pktmp = X509_get_pubkey(x509);
 231                         EVP_PKEY_copy_parameters(pktmp,
 232                                                 SSL_get_privatekey(ssl));
 233                         EVP_PKEY_free(pktmp);
 234                 }
 235                 SSL_free(ssl);
 236                 */
 237
 238                 /* If we are using DSA, we can copy the parameters from
 239                  * the private key */
 240
 241
 242                 /* Now we know that a key and cert have been set against
 243                  * the SSL context */
 244                 if (!SSL_CTX_check_private_key(ctx))
 245                         {
 246                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 247                         return(0);
 248                         }
 249                 }
 250         return(1);
 251         }
 252
 253 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
 254                        STACK_OF(X509) *chain, int build_chain)
 255         {
 256         if (cert == NULL)
 257                 return 1;
 258         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
 259                 {
 260                 BIO_printf(bio_err,"error setting certificate\n");
 261                 ERR_print_errors(bio_err);
 262                 return 0;
 263                 }
 264
 265         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
 266                 {
 267                 BIO_printf(bio_err,"error setting private key\n");
 268                 ERR_print_errors(bio_err);
 269                 return 0;
 270                 }
 271
 272         /* Now we know that a key and cert have been set against
 273          * the SSL context */
 274         if (!SSL_CTX_check_private_key(ctx))
 275                 {
 276                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 277                 return 0;
 278                 }
 279         if (chain && !SSL_CTX_set1_chain(ctx, chain))
 280                 {
 281                 BIO_printf(bio_err,"error setting certificate chain\n");
 282                 ERR_print_errors(bio_err);
 283                 return 0;
 284                 }
 285         if (!chain && build_chain && !SSL_CTX_build_cert_chain(ctx, 0))
 286                 {
 287                 BIO_printf(bio_err,"error building certificate chain\n");
 288                 ERR_print_errors(bio_err);
 289                 return 0;
 290                 }
 291
 292         return 1;
 293         }
 294
 295 static void ssl_print_client_cert_types(BIO *bio, SSL *s)
 296         {
 297         const unsigned char *p;
 298         int i;
 299         int cert_type_num = SSL_get0_certificate_types(s, &p);
 300         if (!cert_type_num)
 301                 return;
 302         BIO_puts(bio, "Client Certificate Types: ");
 303         for (i = 0; i < cert_type_num; i++)
 304                 {
 305                 unsigned char cert_type = p[i];
 306                 char *cname;
 307                 switch(cert_type)
 308                         {
 309                 case TLS_CT_RSA_SIGN:
 310                         cname = "RSA sign";
 311                         break;
 312
 313                 case TLS_CT_DSS_SIGN:
 314                         cname = "DSA sign";
 315                         break;
 316
 317                 case TLS_CT_RSA_FIXED_DH:
 318                         cname = "RSA fixed DH";
 319                         break;
 320
 321                 case TLS_CT_DSS_FIXED_DH:
 322                         cname = "DSS fixed DH";
 323                         break;
 324
 325                 case TLS_CT_ECDSA_SIGN:
 326                         cname = "ECDSA sign";
 327                         break;
 328
 329                 case TLS_CT_RSA_FIXED_ECDH:
 330                         cname = "RSA fixed ECDH";
 331                         break;
 332
 333                 case TLS_CT_ECDSA_FIXED_ECDH:
 334                         cname = "ECDSA fixed ECDH";
 335                         break;
 336
 337                 case TLS_CT_GOST94_SIGN:
 338                         cname = "GOST94 Sign";
 339                         break;
 340
 341                 case TLS_CT_GOST01_SIGN:
 342                         cname = "GOST01 Sign";
 343                         break;
 344
 345                 default:
 346                          cname = NULL;
 347                         }
 348
 349                 if (i)
 350                         BIO_puts(bio, ", ");
 351
 352                 if (cname)
 353                         BIO_puts(bio, cname);
 354                 else
 355                         BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 356                 }
 357         BIO_puts(bio, "\n");
 358         }
 359
 360 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 361         {
 362         int i, nsig, client;
 363         client = SSL_is_server(s) ? 0 : 1;
 364         if (shared)
 365                 nsig = SSL_get_shared_sigalgs(s, -1, NULL, NULL, NULL,
 366                                                         NULL, NULL);
 367         else
 368                 nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 369         if (nsig == 0)
 370                 return 1;
 371
 372         if (shared)
 373                 BIO_puts(out, "Shared ");
 374
 375         if (client)
 376                 BIO_puts(out, "Requested ");
 377         BIO_puts(out, "Signature Algorithms: ");
 378         for (i = 0; i < nsig; i++)
 379                 {
 380                 int hash_nid, sign_nid;
 381                 unsigned char rhash, rsign;
 382                 const char *sstr = NULL;
 383                 if (shared)
 384                         SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 385                                                         &rsign, &rhash);
 386                 else
 387                         SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 388                                                         &rsign, &rhash);
 389                 if (i)
 390                         BIO_puts(out, ":");
 391                 if (sign_nid == EVP_PKEY_RSA)
 392                         sstr = "RSA";
 393                 else if(sign_nid == EVP_PKEY_DSA)
 394                         sstr = "DSA";
 395                 else if(sign_nid == EVP_PKEY_EC)
 396                         sstr = "ECDSA";
 397                 if (sstr)
 398                         BIO_printf(out,"%s+", sstr);
 399                 else
 400                         BIO_printf(out,"0x%02X+", (int)rsign);
 401                 if (hash_nid != NID_undef)
 402                         BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
 403                 else
 404                         BIO_printf(out,"0x%02X", (int)rhash);
 405                 }
 406         BIO_puts(out, "\n");
 407         return 1;
 408         }
 409
 410 int ssl_print_sigalgs(BIO *out, SSL *s)
 411         {
 412         if (!SSL_is_server(s))
 413                 ssl_print_client_cert_types(out, s);
 414         do_print_sigalgs(out, s, 0);
 415         do_print_sigalgs(out, s, 1);
 416         return 1;
 417         }
 418
 419 int ssl_print_curves(BIO *out, SSL *s)
 420         {
 421         int i, ncurves, *curves, nid;
 422         const char *cname;
 423         ncurves = SSL_get1_curves(s, NULL);
 424         if (ncurves <= 0)
 425                 return 1;
 426         curves = OPENSSL_malloc(ncurves * sizeof(int));
 427         SSL_get1_curves(s, curves);
 428
 429         BIO_puts(out, "Supported Elliptic Curves: ");
 430         for (i = 0; i < ncurves; i++)
 431                 {
 432                 if (i)
 433                         BIO_puts(out, ":");
 434                 nid = curves[i];
 435                 /* If unrecognised print out hex version */
 436                 if (nid & TLSEXT_nid_unknown)
 437                         BIO_printf(out, "0x%04X", nid & 0xFFFF);
 438                 else
 439                         {
 440                         /* Use NIST name for curve if it exists */
 441                         cname = EC_curve_nid2nist(nid);
 442                         if (!cname)
 443                                 cname = OBJ_nid2sn(nid);
 444                         BIO_printf(out, "%s", cname);
 445                         }
 446                 }
 447         BIO_puts(out, "\nShared Elliptic curves: ");
 448         OPENSSL_free(curves);
 449         ncurves = SSL_get_shared_curve(s, -1);
 450         for (i = 0; i < ncurves; i++)
 451                 {
 452                 if (i)
 453                         BIO_puts(out, ":");
 454                 nid = SSL_get_shared_curve(s, i);
 455                 cname = EC_curve_nid2nist(nid);
 456                 if (!cname)
 457                         cname = OBJ_nid2sn(nid);
 458                 BIO_printf(out, "%s", cname);
 459                 }
 460         if (ncurves == 0)
 461                 BIO_puts(out, "NONE");
 462         BIO_puts(out, "\n");
 463         return 1;
 464         }
 465
 466
 467 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 468                                    int argi, long argl, long ret)
 469         {
 470         BIO *out;
 471
 472         out=(BIO *)BIO_get_callback_arg(bio);
 473         if (out == NULL) return(ret);
 474
 475         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 476                 {
 477                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 478                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 479                 BIO_dump(out,argp,(int)ret);
 480                 return(ret);
 481                 }
 482         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 483                 {
 484                 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 485                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 486                 BIO_dump(out,argp,(int)ret);
 487                 }
 488         return(ret);
 489         }
 490
 491 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 492         {
 493         const char *str;
 494         int w;
 495
 496         w=where& ~SSL_ST_MASK;
 497
 498         if (w & SSL_ST_CONNECT) str="SSL_connect";
 499         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 500         else str="undefined";
 501
 502         if (where & SSL_CB_LOOP)
 503                 {
 504                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 505                 }
 506         else if (where & SSL_CB_ALERT)
 507                 {
 508                 str=(where & SSL_CB_READ)?"read":"write";
 509                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 510                         str,
 511                         SSL_alert_type_string_long(ret),
 512                         SSL_alert_desc_string_long(ret));
 513                 }
 514         else if (where & SSL_CB_EXIT)
 515                 {
 516                 if (ret == 0)
 517                         BIO_printf(bio_err,"%s:failed in %s\n",
 518                                 str,SSL_state_string_long(s));
 519                 else if (ret < 0)
 520                         {
 521                         BIO_printf(bio_err,"%s:error in %s\n",
 522                                 str,SSL_state_string_long(s));
 523                         }
 524                 }
 525         }
 526
 527
 528 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 529         {
 530         BIO *bio = arg;
 531         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 532
 533         str_write_p = write_p ? ">>>" : "<<<";
 534
 535         switch (version)
 536                 {
 537         case SSL2_VERSION:
 538                 str_version = "SSL 2.0";
 539                 break;
 540         case SSL3_VERSION:
 541                 str_version = "SSL 3.0 ";
 542                 break;
 543         case TLS1_VERSION:
 544                 str_version = "TLS 1.0 ";
 545                 break;
 546         case TLS1_1_VERSION:
 547                 str_version = "TLS 1.1 ";
 548                 break;
 549         case TLS1_2_VERSION:
 550                 str_version = "TLS 1.2 ";
 551                 break;
 552         case DTLS1_VERSION:
 553                 str_version = "DTLS 1.0 ";
 554                 break;
 555         case DTLS1_BAD_VER:
 556                 str_version = "DTLS 1.0 (bad) ";
 557                 break;
 558         default:
 559                 str_version = "???";
 560                 }
 561
 562         if (version == SSL2_VERSION)
 563                 {
 564                 str_details1 = "???";
 565
 566                 if (len > 0)
 567                         {
 568                         switch (((const unsigned char*)buf)[0])
 569                                 {
 570                                 case 0:
 571                                         str_details1 = ", ERROR:";
 572                                         str_details2 = " ???";
 573                                         if (len >= 3)
 574                                                 {
 575                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 576
 577                                                 switch (err)
 578                                                         {
 579                                                 case 0x0001:
 580                                                         str_details2 = " NO-CIPHER-ERROR";
 581                                                         break;
 582                                                 case 0x0002:
 583                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 584                                                         break;
 585                                                 case 0x0004:
 586                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 587                                                         break;
 588                                                 case 0x0006:
 589                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 590                                                         break;
 591                                                         }
 592                                                 }
 593
 594                                         break;
 595                                 case 1:
 596                                         str_details1 = ", CLIENT-HELLO";
 597                                         break;
 598                                 case 2:
 599                                         str_details1 = ", CLIENT-MASTER-KEY";
 600                                         break;
 601                                 case 3:
 602                                         str_details1 = ", CLIENT-FINISHED";
 603                                         break;
 604                                 case 4:
 605                                         str_details1 = ", SERVER-HELLO";
 606                                         break;
 607                                 case 5:
 608                                         str_details1 = ", SERVER-VERIFY";
 609                                         break;
 610                                 case 6:
 611                                         str_details1 = ", SERVER-FINISHED";
 612                                         break;
 613                                 case 7:
 614                                         str_details1 = ", REQUEST-CERTIFICATE";
 615                                         break;
 616                                 case 8:
 617                                         str_details1 = ", CLIENT-CERTIFICATE";
 618                                         break;
 619                                 }
 620                         }
 621                 }
 622
 623         if (version == SSL3_VERSION ||
 624             version == TLS1_VERSION ||
 625             version == DTLS1_VERSION ||
 626             version == DTLS1_BAD_VER)
 627                 {
 628                 switch (content_type)
 629                         {
 630                 case 20:
 631                         str_content_type = "ChangeCipherSpec";
 632                         break;
 633                 case 21:
 634                         str_content_type = "Alert";
 635                         break;
 636                 case 22:
 637                         str_content_type = "Handshake";
 638                         break;
 639                         }
 640
 641                 if (content_type == 21) /* Alert */
 642                         {
 643                         str_details1 = ", ???";
 644
 645                         if (len == 2)
 646                                 {
 647                                 switch (((const unsigned char*)buf)[0])
 648                                         {
 649                                 case 1:
 650                                         str_details1 = ", warning";
 651                                         break;
 652                                 case 2:
 653                                         str_details1 = ", fatal";
 654                                         break;
 655                                         }
 656
 657                                 str_details2 = " ???";
 658                                 switch (((const unsigned char*)buf)[1])
 659                                         {
 660                                 case 0:
 661                                         str_details2 = " close_notify";
 662                                         break;
 663                                 case 10:
 664                                         str_details2 = " unexpected_message";
 665                                         break;
 666                                 case 20:
 667                                         str_details2 = " bad_record_mac";
 668                                         break;
 669                                 case 21:
 670                                         str_details2 = " decryption_failed";
 671                                         break;
 672                                 case 22:
 673                                         str_details2 = " record_overflow";
 674                                         break;
 675                                 case 30:
 676                                         str_details2 = " decompression_failure";
 677                                         break;
 678                                 case 40:
 679                                         str_details2 = " handshake_failure";
 680                                         break;
 681                                 case 42:
 682                                         str_details2 = " bad_certificate";
 683                                         break;
 684                                 case 43:
 685                                         str_details2 = " unsupported_certificate";
 686                                         break;
 687                                 case 44:
 688                                         str_details2 = " certificate_revoked";
 689                                         break;
 690                                 case 45:
 691                                         str_details2 = " certificate_expired";
 692                                         break;
 693                                 case 46:
 694                                         str_details2 = " certificate_unknown";
 695                                         break;
 696                                 case 47:
 697                                         str_details2 = " illegal_parameter";
 698                                         break;
 699                                 case 48:
 700                                         str_details2 = " unknown_ca";
 701                                         break;
 702                                 case 49:
 703                                         str_details2 = " access_denied";
 704                                         break;
 705                                 case 50:
 706                                         str_details2 = " decode_error";
 707                                         break;
 708                                 case 51:
 709                                         str_details2 = " decrypt_error";
 710                                         break;
 711                                 case 60:
 712                                         str_details2 = " export_restriction";
 713                                         break;
 714                                 case 70:
 715                                         str_details2 = " protocol_version";
 716                                         break;
 717                                 case 71:
 718                                         str_details2 = " insufficient_security";
 719                                         break;
 720                                 case 80:
 721                                         str_details2 = " internal_error";
 722                                         break;
 723                                 case 90:
 724                                         str_details2 = " user_canceled";
 725                                         break;
 726                                 case 100:
 727                                         str_details2 = " no_renegotiation";
 728                                         break;
 729                                 case 110:
 730                                         str_details2 = " unsupported_extension";
 731                                         break;
 732                                 case 111:
 733                                         str_details2 = " certificate_unobtainable";
 734                                         break;
 735                                 case 112:
 736                                         str_details2 = " unrecognized_name";
 737                                         break;
 738                                 case 113:
 739                                         str_details2 = " bad_certificate_status_response";
 740                                         break;
 741                                 case 114:
 742                                         str_details2 = " bad_certificate_hash_value";
 743                                         break;
 744                                 case 115:
 745                                         str_details2 = " unknown_psk_identity";
 746                                         break;
 747                                         }
 748                                 }
 749                         }
 750
 751                 if (content_type == 22) /* Handshake */
 752                         {
 753                         str_details1 = "???";
 754
 755                         if (len > 0)
 756                                 {
 757                                 switch (((const unsigned char*)buf)[0])
 758                                         {
 759                                 case 0:
 760                                         str_details1 = ", HelloRequest";
 761                                         break;
 762                                 case 1:
 763                                         str_details1 = ", ClientHello";
 764                                         break;
 765                                 case 2:
 766                                         str_details1 = ", ServerHello";
 767                                         break;
 768                                 case 3:
 769                                         str_details1 = ", HelloVerifyRequest";
 770                                         break;
 771                                 case 11:
 772                                         str_details1 = ", Certificate";
 773                                         break;
 774                                 case 12:
 775                                         str_details1 = ", ServerKeyExchange";
 776                                         break;
 777                                 case 13:
 778                                         str_details1 = ", CertificateRequest";
 779                                         break;
 780                                 case 14:
 781                                         str_details1 = ", ServerHelloDone";
 782                                         break;
 783                                 case 15:
 784                                         str_details1 = ", CertificateVerify";
 785                                         break;
 786                                 case 16:
 787                                         str_details1 = ", ClientKeyExchange";
 788                                         break;
 789                                 case 20:
 790                                         str_details1 = ", Finished";
 791                                         break;
 792                                         }
 793                                 }
 794                         }
 795
 796 #ifndef OPENSSL_NO_HEARTBEATS
 797                 if (content_type == 24) /* Heartbeat */
 798                         {
 799                         str_details1 = ", Heartbeat";
 800
 801                         if (len > 0)
 802                                 {
 803                                 switch (((const unsigned char*)buf)[0])
 804                                         {
 805                                 case 1:
 806                                         str_details1 = ", HeartbeatRequest";
 807                                         break;
 808                                 case 2:
 809                                         str_details1 = ", HeartbeatResponse";
 810                                         break;
 811                                         }
 812                                 }
 813                         }
 814 #endif
 815                 }
 816
 817         BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);
 818
 819         if (len > 0)
 820                 {
 821                 size_t num, i;
 822
 823                 BIO_printf(bio, "   ");
 824                 num = len;
 825 #if 0
 826                 if (num > 16)
 827                         num = 16;
 828 #endif
 829                 for (i = 0; i < num; i++)
 830                         {
 831                         if (i % 16 == 0 && i > 0)
 832                                 BIO_printf(bio, "\n   ");
 833                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 834                         }
 835                 if (i < len)
 836                         BIO_printf(bio, " ...");
 837                 BIO_printf(bio, "\n");
 838                 }
 839         (void)BIO_flush(bio);
 840         }
 841
 842 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 843                                         unsigned char *data, int len,
 844                                         void *arg)
 845         {
 846         BIO *bio = arg;
 847         char *extname;
 848
 849         switch(type)
 850                 {
 851                 case TLSEXT_TYPE_server_name:
 852                 extname = "server name";
 853                 break;
 854
 855                 case TLSEXT_TYPE_max_fragment_length:
 856                 extname = "max fragment length";
 857                 break;
 858
 859                 case TLSEXT_TYPE_client_certificate_url:
 860                 extname = "client certificate URL";
 861                 break;
 862
 863                 case TLSEXT_TYPE_trusted_ca_keys:
 864                 extname = "trusted CA keys";
 865                 break;
 866
 867                 case TLSEXT_TYPE_truncated_hmac:
 868                 extname = "truncated HMAC";
 869                 break;
 870
 871                 case TLSEXT_TYPE_status_request:
 872                 extname = "status request";
 873                 break;
 874
 875                 case TLSEXT_TYPE_user_mapping:
 876                 extname = "user mapping";
 877                 break;
 878
 879                 case TLSEXT_TYPE_client_authz:
 880                 extname = "client authz";
 881                 break;
 882
 883                 case TLSEXT_TYPE_server_authz:
 884                 extname = "server authz";
 885                 break;
 886
 887                 case TLSEXT_TYPE_cert_type:
 888                 extname = "cert type";
 889                 break;
 890
 891                 case TLSEXT_TYPE_elliptic_curves:
 892                 extname = "elliptic curves";
 893                 break;
 894
 895                 case TLSEXT_TYPE_ec_point_formats:
 896                 extname = "EC point formats";
 897                 break;
 898
 899                 case TLSEXT_TYPE_srp:
 900                 extname = "SRP";
 901                 break;
 902
 903                 case TLSEXT_TYPE_signature_algorithms:
 904                 extname = "signature algorithms";
 905                 break;
 906
 907                 case TLSEXT_TYPE_use_srtp:
 908                 extname = "use SRTP";
 909                 break;
 910
 911                 case TLSEXT_TYPE_heartbeat:
 912                 extname = "heartbeat";
 913                 break;
 914
 915                 case TLSEXT_TYPE_session_ticket:
 916                 extname = "session ticket";
 917                 break;
 918
 919                 case TLSEXT_TYPE_renegotiate:
 920                 extname = "renegotiation info";
 921                 break;
 922
 923 #ifdef TLSEXT_TYPE_opaque_prf_input
 924                 case TLSEXT_TYPE_opaque_prf_input:
 925                 extname = "opaque PRF input";
 926                 break;
 927 #endif
 928 #ifdef TLSEXT_TYPE_next_proto_neg
 929                 case TLSEXT_TYPE_next_proto_neg:
 930                 extname = "next protocol";
 931                 break;
 932 #endif
 933
 934                 default:
 935                 extname = "unknown";
 936                 break;
 937
 938                 }
 939
 940         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 941                         client_server ? "server": "client",
 942                         extname, type, len);
 943         BIO_dump(bio, (char *)data, len);
 944         (void)BIO_flush(bio);
 945         }
 946
 947 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
 948         {
 949         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 950         unsigned int length, resultlength;
 951         union {
 952                 struct sockaddr sa;
 953                 struct sockaddr_in s4;
 954 #if OPENSSL_USE_IPV6
 955                 struct sockaddr_in6 s6;
 956 #endif
 957         } peer;
 958
 959         /* Initialize a random secret */
 960         if (!cookie_initialized)
 961                 {
 962                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
 963                         {
 964                         BIO_printf(bio_err,"error setting random cookie secret\n");
 965                         return 0;
 966                         }
 967                 cookie_initialized = 1;
 968                 }
 969
 970         /* Read peer information */
 971         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 972
 973         /* Create buffer with peer's address and port */
 974         length = 0;
 975         switch (peer.sa.sa_family)
 976                 {
 977         case AF_INET:
 978                 length += sizeof(struct in_addr);
 979                 length += sizeof(peer.s4.sin_port);
 980                 break;
 981 #if OPENSSL_USE_IPV6
 982         case AF_INET6:
 983                 length += sizeof(struct in6_addr);
 984                 length += sizeof(peer.s6.sin6_port);
 985                 break;
 986 #endif
 987         default:
 988                 OPENSSL_assert(0);
 989                 break;
 990                 }
 991         buffer = OPENSSL_malloc(length);
 992
 993         if (buffer == NULL)
 994                 {
 995                 BIO_printf(bio_err,"out of memory\n");
 996                 return 0;
 997                 }
 998
 999         switch (peer.sa.sa_family)
1000                 {
1001         case AF_INET:
1002                 memcpy(buffer,
1003                        &peer.s4.sin_port,
1004                        sizeof(peer.s4.sin_port));
1005                 memcpy(buffer + sizeof(peer.s4.sin_port),
1006                        &peer.s4.sin_addr,
1007                        sizeof(struct in_addr));
1008                 break;
1009 #if OPENSSL_USE_IPV6
1010         case AF_INET6:
1011                 memcpy(buffer,
1012                        &peer.s6.sin6_port,
1013                        sizeof(peer.s6.sin6_port));
1014                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1015                        &peer.s6.sin6_addr,
1016                        sizeof(struct in6_addr));
1017                 break;
1018 #endif
1019         default:
1020                 OPENSSL_assert(0);
1021                 break;
1022                 }
1023
1024         /* Calculate HMAC of buffer using the secret */
1025         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1026              buffer, length, result, &resultlength);
1027         OPENSSL_free(buffer);
1028
1029         memcpy(cookie, result, resultlength);
1030         *cookie_len = resultlength;
1031
1032         return 1;
1033         }
1034
1035 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
1036         {
1037         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1038         unsigned int length, resultlength;
1039         union {
1040                 struct sockaddr sa;
1041                 struct sockaddr_in s4;
1042 #if OPENSSL_USE_IPV6
1043                 struct sockaddr_in6 s6;
1044 #endif
1045         } peer;
1046
1047         /* If secret isn't initialized yet, the cookie can't be valid */
1048         if (!cookie_initialized)
1049                 return 0;
1050
1051         /* Read peer information */
1052         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1053
1054         /* Create buffer with peer's address and port */
1055         length = 0;
1056         switch (peer.sa.sa_family)
1057                 {
1058         case AF_INET:
1059                 length += sizeof(struct in_addr);
1060                 length += sizeof(peer.s4.sin_port);
1061                 break;
1062 #if OPENSSL_USE_IPV6
1063         case AF_INET6:
1064                 length += sizeof(struct in6_addr);
1065                 length += sizeof(peer.s6.sin6_port);
1066                 break;
1067 #endif
1068         default:
1069                 OPENSSL_assert(0);
1070                 break;
1071                 }
1072         buffer = OPENSSL_malloc(length);
1073
1074         if (buffer == NULL)
1075                 {
1076                 BIO_printf(bio_err,"out of memory\n");
1077                 return 0;
1078                 }
1079
1080         switch (peer.sa.sa_family)
1081                 {
1082         case AF_INET:
1083                 memcpy(buffer,
1084                        &peer.s4.sin_port,
1085                        sizeof(peer.s4.sin_port));
1086                 memcpy(buffer + sizeof(peer.s4.sin_port),
1087                        &peer.s4.sin_addr,
1088                        sizeof(struct in_addr));
1089                 break;
1090 #if OPENSSL_USE_IPV6
1091         case AF_INET6:
1092                 memcpy(buffer,
1093                        &peer.s6.sin6_port,
1094                        sizeof(peer.s6.sin6_port));
1095                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1096                        &peer.s6.sin6_addr,
1097                        sizeof(struct in6_addr));
1098                 break;
1099 #endif
1100         default:
1101                 OPENSSL_assert(0);
1102                 break;
1103                 }
1104
1105         /* Calculate HMAC of buffer using the secret */
1106         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1107              buffer, length, result, &resultlength);
1108         OPENSSL_free(buffer);
1109
1110         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
1111                 return 1;
1112
1113         return 0;
1114         }
1115
1116 /* Example of extended certificate handling. Where the standard support
1117  * of one certificate per algorithm is not sufficient an application
1118  * can decide which certificate(s) to use at runtime based on whatever
1119  * criteria it deems appropriate.
1120  */
1121
1122 /* Linked list of certificates, keys and chains */
1123 struct  ssl_excert_st
1124         {
1125         int certform;
1126         const char *certfile;
1127         int keyform;
1128         const char *keyfile;
1129         const char *chainfile;
1130         X509 *cert;
1131         EVP_PKEY *key;
1132         STACK_OF(X509) *chain;
1133         int build_chain;
1134         struct ssl_excert_st *next, *prev;
1135         };
1136
1137 struct chain_flags
1138         {
1139         int flag;
1140         const char *name;
1141         };
1142
1143 struct chain_flags chain_flags_list[] =
1144         {
1145                 {CERT_PKEY_VALID, "Overall Validity"},
1146                 {CERT_PKEY_SIGN,  "Sign with EE key"},
1147                 {CERT_PKEY_EE_SIGNATURE, "EE signature"},
1148                 {CERT_PKEY_CA_SIGNATURE, "CA signature"},
1149                 {CERT_PKEY_EE_PARAM, "EE key parameters"},
1150                 {CERT_PKEY_CA_PARAM, "CA key parameters"},
1151                 {CERT_PKEY_EXPLICIT_SIGN,  "Explicity sign with EE key"},
1152                 {CERT_PKEY_ISSUER_NAME,  "Issuer Name"},
1153                 {CERT_PKEY_CERT_TYPE,  "Certificate Type"},
1154                 {0, NULL}
1155         };
1156
1157
1158 static void print_chain_flags(BIO *out, int flags)
1159         {
1160         struct chain_flags *ctmp = chain_flags_list;
1161         while(ctmp->name)
1162                 {
1163                 BIO_printf(out, "\t%s: %s\n", ctmp->name,
1164                                 flags & ctmp->flag ? "OK" : "NOT OK");
1165                 ctmp++;
1166                 }
1167         }
1168
1169 /* Very basic selection callback: just use any certificate chain
1170  * reported as valid. More sophisticated could prioritise according
1171  * to local policy.
1172  */
1173 static int set_cert_cb(SSL *ssl, void *arg)
1174         {
1175         int i, rv;
1176         SSL_EXCERT *exc = arg;
1177         SSL_certs_clear(ssl);
1178
1179         if (!exc)
1180                 return 1;
1181
1182         /* Go to end of list and traverse backwards since we prepend
1183          * newer entries this retains the original order.
1184          */
1185         while (exc->next)
1186                 exc = exc->next;
1187
1188         i = 0;
1189
1190         while(exc)
1191                 {
1192                 i++;
1193                 rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
1194                 BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
1195                 X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
1196                                                         XN_FLAG_ONELINE);
1197                 BIO_puts(bio_err, "\n");
1198
1199                 print_chain_flags(bio_err, rv);
1200                 if (rv & CERT_PKEY_VALID)
1201                         {
1202                         SSL_use_certificate(ssl, exc->cert);
1203                         SSL_use_PrivateKey(ssl, exc->key);
1204                         /* NB: we wouldn't normally do this as it is
1205                          * not efficient building chains on each connection
1206                          * better to cache the chain in advance.
1207                          */
1208                         if (exc->build_chain)
1209                                 {
1210                                 if (!SSL_build_cert_chain(ssl, 0))
1211                                         return 0;
1212                                 }
1213                         else if (exc->chain)
1214                                 SSL_set1_chain(ssl, exc->chain);
1215                         }
1216                 exc = exc->prev;
1217                 }
1218         return 1;
1219         }
1220
1221 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
1222         {
1223         SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
1224         }
1225
1226 static int ssl_excert_prepend(SSL_EXCERT **pexc)
1227         {
1228         SSL_EXCERT *exc;
1229         exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
1230         if (!exc)
1231                 return 0;
1232         exc->certfile = NULL;
1233         exc->keyfile = NULL;
1234         exc->chainfile = NULL;
1235         exc->cert = NULL;
1236         exc->key = NULL;
1237         exc->chain = NULL;
1238         exc->prev = NULL;
1239         exc->build_chain = 0;
1240
1241         exc->next = *pexc;
1242         *pexc = exc;
1243
1244         if (exc->next)
1245                 {
1246                 exc->certform = exc->next->certform;
1247                 exc->keyform = exc->next->keyform;
1248                 exc->next->prev = exc;
1249                 }
1250         else
1251                 {
1252                 exc->certform = FORMAT_PEM;
1253                 exc->keyform = FORMAT_PEM;
1254                 }
1255         return 1;
1256
1257         }
1258
1259 void ssl_excert_free(SSL_EXCERT *exc)
1260         {
1261         SSL_EXCERT *curr;
1262         while (exc)
1263                 {
1264                 if (exc->cert)
1265                         X509_free(exc->cert);
1266                 if (exc->key)
1267                         EVP_PKEY_free(exc->key);
1268                 if (exc->chain)
1269                         sk_X509_pop_free(exc->chain, X509_free);
1270                 curr = exc;
1271                 exc = exc->next;
1272                 OPENSSL_free(curr);
1273                 }
1274         }
1275
1276 int load_excert(SSL_EXCERT **pexc, BIO *err)
1277         {
1278         SSL_EXCERT *exc = *pexc;
1279         if (!exc)
1280                 return 1;
1281         /* If nothing in list, free and set to NULL */
1282         if (!exc->certfile && !exc->next)
1283                 {
1284                 ssl_excert_free(exc);
1285                 *pexc = NULL;
1286                 return 1;
1287                 }
1288         for(; exc; exc=exc->next)
1289                 {
1290                 if (!exc->certfile)
1291                         {
1292                         BIO_printf(err, "Missing filename\n");
1293                         return 0;
1294                         }
1295                 exc->cert = load_cert(err, exc->certfile, exc->certform,
1296                                         NULL, NULL, "Server Certificate");
1297                 if (!exc->cert)
1298                         return 0;
1299                 if (exc->keyfile)
1300                         exc->keyfile = exc->certfile;
1301                 exc->key = load_key(err, exc->certfile, exc->certform, 0,
1302                                         NULL, NULL, "Server Certificate");
1303                 if (!exc->key)
1304                         return 0;
1305                 if (exc->chainfile)
1306                         {
1307                         exc->chain = load_certs(err,
1308                                                 exc->chainfile, FORMAT_PEM,
1309                                                 NULL, NULL,
1310                                                 "Server Chain");
1311                         if (!exc->chainfile)
1312                                 return 0;
1313                         }
1314                 }
1315         return 1;
1316         }
1317
1318
1319 int args_excert(char ***pargs, int *pargc,
1320                         int *badarg, BIO *err, SSL_EXCERT **pexc)
1321         {
1322         char *arg = **pargs, *argn = (*pargs)[1];
1323         SSL_EXCERT *exc = *pexc;
1324         int narg = 2;
1325         if (!exc)
1326                 {
1327                 if (ssl_excert_prepend(&exc))
1328                         *pexc = exc;
1329                 else
1330                         {
1331                         BIO_printf(err, "Error initialising xcert\n");
1332                         *badarg = 1;
1333                         goto err;
1334                         }
1335                 }
1336         if (strcmp(arg, "-xcert") == 0)
1337                 {
1338                 if (!argn)
1339                         {
1340                         *badarg = 1;
1341                         return 1;
1342                         }
1343                 if (exc->certfile && !ssl_excert_prepend(&exc))
1344                         {
1345                         BIO_printf(err, "Error adding xcert\n");
1346                         *badarg = 1;
1347                         goto err;
1348                         }
1349                 exc->certfile = argn;
1350                 }
1351         else if (strcmp(arg,"-xkey") == 0)
1352                 {
1353                 if (!argn)
1354                         {
1355                         *badarg = 1;
1356                         return 1;
1357                         }
1358                 if (exc->keyfile)
1359                         {
1360                         BIO_printf(err, "Key already specified\n");
1361                         *badarg = 1;
1362                         return 1;
1363                         }
1364                 exc->keyfile = argn;
1365                 }
1366         else if (strcmp(arg,"-xchain") == 0)
1367                 {
1368                 if (!argn)
1369                         {
1370                         *badarg = 1;
1371                         return 1;
1372                         }
1373                 if (exc->chainfile)
1374                         {
1375                         BIO_printf(err, "Chain already specified\n");
1376                         *badarg = 1;
1377                         return 1;
1378                         }
1379                 exc->chainfile = argn;
1380                 }
1381         else if (strcmp(arg,"-xchain_build") == 0)
1382                 {
1383                 narg = 1;
1384                 exc->build_chain = 1;
1385                 }
1386         else if (strcmp(arg,"-xcertform") == 0)
1387                 {
1388                 if (!argn)
1389                         {
1390                         *badarg = 1;
1391                         goto err;
1392                         }
1393                 exc->certform = str2fmt(argn);
1394                 }
1395         else if (strcmp(arg,"-xkeyform") == 0)
1396                 {
1397                 if (!argn)
1398                         {
1399                         *badarg = 1;
1400                         goto err;
1401                         }
1402                 exc->keyform = str2fmt(argn);
1403                 }
1404         else
1405                 return 0;
1406
1407         (*pargs) += narg;
1408
1409         if (pargc)
1410                 *pargc -= narg;
1411
1412         *pexc = exc;
1413
1414         return 1;
1415
1416         err:
1417         ERR_print_errors(err);
1418         ssl_excert_free(exc);
1419         *pexc = NULL;
1420         return 1;
1421         }
1422