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         int mdnid;
 413         if (!SSL_is_server(s))
 414                 ssl_print_client_cert_types(out, s);
 415         do_print_sigalgs(out, s, 0);
 416         do_print_sigalgs(out, s, 1);
 417         if (SSL_get_peer_signature_nid(s, &mdnid))
 418                 BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(mdnid));
 419         return 1;
 420         }
 421
 422 int ssl_print_curves(BIO *out, SSL *s)
 423         {
 424         int i, ncurves, *curves, nid;
 425         const char *cname;
 426         ncurves = SSL_get1_curves(s, NULL);
 427         if (ncurves <= 0)
 428                 return 1;
 429         curves = OPENSSL_malloc(ncurves * sizeof(int));
 430         SSL_get1_curves(s, curves);
 431
 432         BIO_puts(out, "Supported Elliptic Curves: ");
 433         for (i = 0; i < ncurves; i++)
 434                 {
 435                 if (i)
 436                         BIO_puts(out, ":");
 437                 nid = curves[i];
 438                 /* If unrecognised print out hex version */
 439                 if (nid & TLSEXT_nid_unknown)
 440                         BIO_printf(out, "0x%04X", nid & 0xFFFF);
 441                 else
 442                         {
 443                         /* Use NIST name for curve if it exists */
 444                         cname = EC_curve_nid2nist(nid);
 445                         if (!cname)
 446                                 cname = OBJ_nid2sn(nid);
 447                         BIO_printf(out, "%s", cname);
 448                         }
 449                 }
 450         BIO_puts(out, "\nShared Elliptic curves: ");
 451         OPENSSL_free(curves);
 452         ncurves = SSL_get_shared_curve(s, -1);
 453         for (i = 0; i < ncurves; i++)
 454                 {
 455                 if (i)
 456                         BIO_puts(out, ":");
 457                 nid = SSL_get_shared_curve(s, i);
 458                 cname = EC_curve_nid2nist(nid);
 459                 if (!cname)
 460                         cname = OBJ_nid2sn(nid);
 461                 BIO_printf(out, "%s", cname);
 462                 }
 463         if (ncurves == 0)
 464                 BIO_puts(out, "NONE");
 465         BIO_puts(out, "\n");
 466         return 1;
 467         }
 468
 469
 470 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 471                                    int argi, long argl, long ret)
 472         {
 473         BIO *out;
 474
 475         out=(BIO *)BIO_get_callback_arg(bio);
 476         if (out == NULL) return(ret);
 477
 478         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 479                 {
 480                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 481                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 482                 BIO_dump(out,argp,(int)ret);
 483                 return(ret);
 484                 }
 485         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 486                 {
 487                 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 488                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 489                 BIO_dump(out,argp,(int)ret);
 490                 }
 491         return(ret);
 492         }
 493
 494 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 495         {
 496         const char *str;
 497         int w;
 498
 499         w=where& ~SSL_ST_MASK;
 500
 501         if (w & SSL_ST_CONNECT) str="SSL_connect";
 502         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 503         else str="undefined";
 504
 505         if (where & SSL_CB_LOOP)
 506                 {
 507                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 508                 }
 509         else if (where & SSL_CB_ALERT)
 510                 {
 511                 str=(where & SSL_CB_READ)?"read":"write";
 512                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 513                         str,
 514                         SSL_alert_type_string_long(ret),
 515                         SSL_alert_desc_string_long(ret));
 516                 }
 517         else if (where & SSL_CB_EXIT)
 518                 {
 519                 if (ret == 0)
 520                         BIO_printf(bio_err,"%s:failed in %s\n",
 521                                 str,SSL_state_string_long(s));
 522                 else if (ret < 0)
 523                         {
 524                         BIO_printf(bio_err,"%s:error in %s\n",
 525                                 str,SSL_state_string_long(s));
 526                         }
 527                 }
 528         }
 529
 530
 531 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 532         {
 533         BIO *bio = arg;
 534         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 535
 536         str_write_p = write_p ? ">>>" : "<<<";
 537
 538         switch (version)
 539                 {
 540         case SSL2_VERSION:
 541                 str_version = "SSL 2.0";
 542                 break;
 543         case SSL3_VERSION:
 544                 str_version = "SSL 3.0 ";
 545                 break;
 546         case TLS1_VERSION:
 547                 str_version = "TLS 1.0 ";
 548                 break;
 549         case TLS1_1_VERSION:
 550                 str_version = "TLS 1.1 ";
 551                 break;
 552         case TLS1_2_VERSION:
 553                 str_version = "TLS 1.2 ";
 554                 break;
 555         case DTLS1_VERSION:
 556                 str_version = "DTLS 1.0 ";
 557                 break;
 558         case DTLS1_BAD_VER:
 559                 str_version = "DTLS 1.0 (bad) ";
 560                 break;
 561         default:
 562                 str_version = "???";
 563                 }
 564
 565         if (version == SSL2_VERSION)
 566                 {
 567                 str_details1 = "???";
 568
 569                 if (len > 0)
 570                         {
 571                         switch (((const unsigned char*)buf)[0])
 572                                 {
 573                                 case 0:
 574                                         str_details1 = ", ERROR:";
 575                                         str_details2 = " ???";
 576                                         if (len >= 3)
 577                                                 {
 578                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 579
 580                                                 switch (err)
 581                                                         {
 582                                                 case 0x0001:
 583                                                         str_details2 = " NO-CIPHER-ERROR";
 584                                                         break;
 585                                                 case 0x0002:
 586                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 587                                                         break;
 588                                                 case 0x0004:
 589                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 590                                                         break;
 591                                                 case 0x0006:
 592                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 593                                                         break;
 594                                                         }
 595                                                 }
 596
 597                                         break;
 598                                 case 1:
 599                                         str_details1 = ", CLIENT-HELLO";
 600                                         break;
 601                                 case 2:
 602                                         str_details1 = ", CLIENT-MASTER-KEY";
 603                                         break;
 604                                 case 3:
 605                                         str_details1 = ", CLIENT-FINISHED";
 606                                         break;
 607                                 case 4:
 608                                         str_details1 = ", SERVER-HELLO";
 609                                         break;
 610                                 case 5:
 611                                         str_details1 = ", SERVER-VERIFY";
 612                                         break;
 613                                 case 6:
 614                                         str_details1 = ", SERVER-FINISHED";
 615                                         break;
 616                                 case 7:
 617                                         str_details1 = ", REQUEST-CERTIFICATE";
 618                                         break;
 619                                 case 8:
 620                                         str_details1 = ", CLIENT-CERTIFICATE";
 621                                         break;
 622                                 }
 623                         }
 624                 }
 625
 626         if (version == SSL3_VERSION ||
 627             version == TLS1_VERSION ||
 628             version == TLS1_1_VERSION ||
 629             version == TLS1_2_VERSION ||
 630             version == DTLS1_VERSION ||
 631             version == DTLS1_BAD_VER)
 632                 {
 633                 switch (content_type)
 634                         {
 635                 case 20:
 636                         str_content_type = "ChangeCipherSpec";
 637                         break;
 638                 case 21:
 639                         str_content_type = "Alert";
 640                         break;
 641                 case 22:
 642                         str_content_type = "Handshake";
 643                         break;
 644                         }
 645
 646                 if (content_type == 21) /* Alert */
 647                         {
 648                         str_details1 = ", ???";
 649
 650                         if (len == 2)
 651                                 {
 652                                 switch (((const unsigned char*)buf)[0])
 653                                         {
 654                                 case 1:
 655                                         str_details1 = ", warning";
 656                                         break;
 657                                 case 2:
 658                                         str_details1 = ", fatal";
 659                                         break;
 660                                         }
 661
 662                                 str_details2 = " ???";
 663                                 switch (((const unsigned char*)buf)[1])
 664                                         {
 665                                 case 0:
 666                                         str_details2 = " close_notify";
 667                                         break;
 668                                 case 10:
 669                                         str_details2 = " unexpected_message";
 670                                         break;
 671                                 case 20:
 672                                         str_details2 = " bad_record_mac";
 673                                         break;
 674                                 case 21:
 675                                         str_details2 = " decryption_failed";
 676                                         break;
 677                                 case 22:
 678                                         str_details2 = " record_overflow";
 679                                         break;
 680                                 case 30:
 681                                         str_details2 = " decompression_failure";
 682                                         break;
 683                                 case 40:
 684                                         str_details2 = " handshake_failure";
 685                                         break;
 686                                 case 42:
 687                                         str_details2 = " bad_certificate";
 688                                         break;
 689                                 case 43:
 690                                         str_details2 = " unsupported_certificate";
 691                                         break;
 692                                 case 44:
 693                                         str_details2 = " certificate_revoked";
 694                                         break;
 695                                 case 45:
 696                                         str_details2 = " certificate_expired";
 697                                         break;
 698                                 case 46:
 699                                         str_details2 = " certificate_unknown";
 700                                         break;
 701                                 case 47:
 702                                         str_details2 = " illegal_parameter";
 703                                         break;
 704                                 case 48:
 705                                         str_details2 = " unknown_ca";
 706                                         break;
 707                                 case 49:
 708                                         str_details2 = " access_denied";
 709                                         break;
 710                                 case 50:
 711                                         str_details2 = " decode_error";
 712                                         break;
 713                                 case 51:
 714                                         str_details2 = " decrypt_error";
 715                                         break;
 716                                 case 60:
 717                                         str_details2 = " export_restriction";
 718                                         break;
 719                                 case 70:
 720                                         str_details2 = " protocol_version";
 721                                         break;
 722                                 case 71:
 723                                         str_details2 = " insufficient_security";
 724                                         break;
 725                                 case 80:
 726                                         str_details2 = " internal_error";
 727                                         break;
 728                                 case 90:
 729                                         str_details2 = " user_canceled";
 730                                         break;
 731                                 case 100:
 732                                         str_details2 = " no_renegotiation";
 733                                         break;
 734                                 case 110:
 735                                         str_details2 = " unsupported_extension";
 736                                         break;
 737                                 case 111:
 738                                         str_details2 = " certificate_unobtainable";
 739                                         break;
 740                                 case 112:
 741                                         str_details2 = " unrecognized_name";
 742                                         break;
 743                                 case 113:
 744                                         str_details2 = " bad_certificate_status_response";
 745                                         break;
 746                                 case 114:
 747                                         str_details2 = " bad_certificate_hash_value";
 748                                         break;
 749                                 case 115:
 750                                         str_details2 = " unknown_psk_identity";
 751                                         break;
 752                                         }
 753                                 }
 754                         }
 755
 756                 if (content_type == 22) /* Handshake */
 757                         {
 758                         str_details1 = "???";
 759
 760                         if (len > 0)
 761                                 {
 762                                 switch (((const unsigned char*)buf)[0])
 763                                         {
 764                                 case 0:
 765                                         str_details1 = ", HelloRequest";
 766                                         break;
 767                                 case 1:
 768                                         str_details1 = ", ClientHello";
 769                                         break;
 770                                 case 2:
 771                                         str_details1 = ", ServerHello";
 772                                         break;
 773                                 case 3:
 774                                         str_details1 = ", HelloVerifyRequest";
 775                                         break;
 776                                 case 11:
 777                                         str_details1 = ", Certificate";
 778                                         break;
 779                                 case 12:
 780                                         str_details1 = ", ServerKeyExchange";
 781                                         break;
 782                                 case 13:
 783                                         str_details1 = ", CertificateRequest";
 784                                         break;
 785                                 case 14:
 786                                         str_details1 = ", ServerHelloDone";
 787                                         break;
 788                                 case 15:
 789                                         str_details1 = ", CertificateVerify";
 790                                         break;
 791                                 case 16:
 792                                         str_details1 = ", ClientKeyExchange";
 793                                         break;
 794                                 case 20:
 795                                         str_details1 = ", Finished";
 796                                         break;
 797                                         }
 798                                 }
 799                         }
 800
 801 #ifndef OPENSSL_NO_HEARTBEATS
 802                 if (content_type == 24) /* Heartbeat */
 803                         {
 804                         str_details1 = ", Heartbeat";
 805
 806                         if (len > 0)
 807                                 {
 808                                 switch (((const unsigned char*)buf)[0])
 809                                         {
 810                                 case 1:
 811                                         str_details1 = ", HeartbeatRequest";
 812                                         break;
 813                                 case 2:
 814                                         str_details1 = ", HeartbeatResponse";
 815                                         break;
 816                                         }
 817                                 }
 818                         }
 819 #endif
 820                 }
 821
 822         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);
 823
 824         if (len > 0)
 825                 {
 826                 size_t num, i;
 827
 828                 BIO_printf(bio, "   ");
 829                 num = len;
 830 #if 0
 831                 if (num > 16)
 832                         num = 16;
 833 #endif
 834                 for (i = 0; i < num; i++)
 835                         {
 836                         if (i % 16 == 0 && i > 0)
 837                                 BIO_printf(bio, "\n   ");
 838                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 839                         }
 840                 if (i < len)
 841                         BIO_printf(bio, " ...");
 842                 BIO_printf(bio, "\n");
 843                 }
 844         (void)BIO_flush(bio);
 845         }
 846
 847 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 848                                         unsigned char *data, int len,
 849                                         void *arg)
 850         {
 851         BIO *bio = arg;
 852         char *extname;
 853
 854         switch(type)
 855                 {
 856                 case TLSEXT_TYPE_server_name:
 857                 extname = "server name";
 858                 break;
 859
 860                 case TLSEXT_TYPE_max_fragment_length:
 861                 extname = "max fragment length";
 862                 break;
 863
 864                 case TLSEXT_TYPE_client_certificate_url:
 865                 extname = "client certificate URL";
 866                 break;
 867
 868                 case TLSEXT_TYPE_trusted_ca_keys:
 869                 extname = "trusted CA keys";
 870                 break;
 871
 872                 case TLSEXT_TYPE_truncated_hmac:
 873                 extname = "truncated HMAC";
 874                 break;
 875
 876                 case TLSEXT_TYPE_status_request:
 877                 extname = "status request";
 878                 break;
 879
 880                 case TLSEXT_TYPE_user_mapping:
 881                 extname = "user mapping";
 882                 break;
 883
 884                 case TLSEXT_TYPE_client_authz:
 885                 extname = "client authz";
 886                 break;
 887
 888                 case TLSEXT_TYPE_server_authz:
 889                 extname = "server authz";
 890                 break;
 891
 892                 case TLSEXT_TYPE_cert_type:
 893                 extname = "cert type";
 894                 break;
 895
 896                 case TLSEXT_TYPE_elliptic_curves:
 897                 extname = "elliptic curves";
 898                 break;
 899
 900                 case TLSEXT_TYPE_ec_point_formats:
 901                 extname = "EC point formats";
 902                 break;
 903
 904                 case TLSEXT_TYPE_srp:
 905                 extname = "SRP";
 906                 break;
 907
 908                 case TLSEXT_TYPE_signature_algorithms:
 909                 extname = "signature algorithms";
 910                 break;
 911
 912                 case TLSEXT_TYPE_use_srtp:
 913                 extname = "use SRTP";
 914                 break;
 915
 916                 case TLSEXT_TYPE_heartbeat:
 917                 extname = "heartbeat";
 918                 break;
 919
 920                 case TLSEXT_TYPE_session_ticket:
 921                 extname = "session ticket";
 922                 break;
 923
 924                 case TLSEXT_TYPE_renegotiate:
 925                 extname = "renegotiation info";
 926                 break;
 927
 928 #ifdef TLSEXT_TYPE_opaque_prf_input
 929                 case TLSEXT_TYPE_opaque_prf_input:
 930                 extname = "opaque PRF input";
 931                 break;
 932 #endif
 933 #ifdef TLSEXT_TYPE_next_proto_neg
 934                 case TLSEXT_TYPE_next_proto_neg:
 935                 extname = "next protocol";
 936                 break;
 937 #endif
 938
 939                 default:
 940                 extname = "unknown";
 941                 break;
 942
 943                 }
 944
 945         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 946                         client_server ? "server": "client",
 947                         extname, type, len);
 948         BIO_dump(bio, (char *)data, len);
 949         (void)BIO_flush(bio);
 950         }
 951
 952 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
 953         {
 954         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 955         unsigned int length, resultlength;
 956         union {
 957                 struct sockaddr sa;
 958                 struct sockaddr_in s4;
 959 #if OPENSSL_USE_IPV6
 960                 struct sockaddr_in6 s6;
 961 #endif
 962         } peer;
 963
 964         /* Initialize a random secret */
 965         if (!cookie_initialized)
 966                 {
 967                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
 968                         {
 969                         BIO_printf(bio_err,"error setting random cookie secret\n");
 970                         return 0;
 971                         }
 972                 cookie_initialized = 1;
 973                 }
 974
 975         /* Read peer information */
 976         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 977
 978         /* Create buffer with peer's address and port */
 979         length = 0;
 980         switch (peer.sa.sa_family)
 981                 {
 982         case AF_INET:
 983                 length += sizeof(struct in_addr);
 984                 length += sizeof(peer.s4.sin_port);
 985                 break;
 986 #if OPENSSL_USE_IPV6
 987         case AF_INET6:
 988                 length += sizeof(struct in6_addr);
 989                 length += sizeof(peer.s6.sin6_port);
 990                 break;
 991 #endif
 992         default:
 993                 OPENSSL_assert(0);
 994                 break;
 995                 }
 996         buffer = OPENSSL_malloc(length);
 997
 998         if (buffer == NULL)
 999                 {
1000                 BIO_printf(bio_err,"out of memory\n");
1001                 return 0;
1002                 }
1003
1004         switch (peer.sa.sa_family)
1005                 {
1006         case AF_INET:
1007                 memcpy(buffer,
1008                        &peer.s4.sin_port,
1009                        sizeof(peer.s4.sin_port));
1010                 memcpy(buffer + sizeof(peer.s4.sin_port),
1011                        &peer.s4.sin_addr,
1012                        sizeof(struct in_addr));
1013                 break;
1014 #if OPENSSL_USE_IPV6
1015         case AF_INET6:
1016                 memcpy(buffer,
1017                        &peer.s6.sin6_port,
1018                        sizeof(peer.s6.sin6_port));
1019                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1020                        &peer.s6.sin6_addr,
1021                        sizeof(struct in6_addr));
1022                 break;
1023 #endif
1024         default:
1025                 OPENSSL_assert(0);
1026                 break;
1027                 }
1028
1029         /* Calculate HMAC of buffer using the secret */
1030         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1031              buffer, length, result, &resultlength);
1032         OPENSSL_free(buffer);
1033
1034         memcpy(cookie, result, resultlength);
1035         *cookie_len = resultlength;
1036
1037         return 1;
1038         }
1039
1040 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
1041         {
1042         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1043         unsigned int length, resultlength;
1044         union {
1045                 struct sockaddr sa;
1046                 struct sockaddr_in s4;
1047 #if OPENSSL_USE_IPV6
1048                 struct sockaddr_in6 s6;
1049 #endif
1050         } peer;
1051
1052         /* If secret isn't initialized yet, the cookie can't be valid */
1053         if (!cookie_initialized)
1054                 return 0;
1055
1056         /* Read peer information */
1057         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1058
1059         /* Create buffer with peer's address and port */
1060         length = 0;
1061         switch (peer.sa.sa_family)
1062                 {
1063         case AF_INET:
1064                 length += sizeof(struct in_addr);
1065                 length += sizeof(peer.s4.sin_port);
1066                 break;
1067 #if OPENSSL_USE_IPV6
1068         case AF_INET6:
1069                 length += sizeof(struct in6_addr);
1070                 length += sizeof(peer.s6.sin6_port);
1071                 break;
1072 #endif
1073         default:
1074                 OPENSSL_assert(0);
1075                 break;
1076                 }
1077         buffer = OPENSSL_malloc(length);
1078
1079         if (buffer == NULL)
1080                 {
1081                 BIO_printf(bio_err,"out of memory\n");
1082                 return 0;
1083                 }
1084
1085         switch (peer.sa.sa_family)
1086                 {
1087         case AF_INET:
1088                 memcpy(buffer,
1089                        &peer.s4.sin_port,
1090                        sizeof(peer.s4.sin_port));
1091                 memcpy(buffer + sizeof(peer.s4.sin_port),
1092                        &peer.s4.sin_addr,
1093                        sizeof(struct in_addr));
1094                 break;
1095 #if OPENSSL_USE_IPV6
1096         case AF_INET6:
1097                 memcpy(buffer,
1098                        &peer.s6.sin6_port,
1099                        sizeof(peer.s6.sin6_port));
1100                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1101                        &peer.s6.sin6_addr,
1102                        sizeof(struct in6_addr));
1103                 break;
1104 #endif
1105         default:
1106                 OPENSSL_assert(0);
1107                 break;
1108                 }
1109
1110         /* Calculate HMAC of buffer using the secret */
1111         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1112              buffer, length, result, &resultlength);
1113         OPENSSL_free(buffer);
1114
1115         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
1116                 return 1;
1117
1118         return 0;
1119         }
1120
1121 /* Example of extended certificate handling. Where the standard support
1122  * of one certificate per algorithm is not sufficient an application
1123  * can decide which certificate(s) to use at runtime based on whatever
1124  * criteria it deems appropriate.
1125  */
1126
1127 /* Linked list of certificates, keys and chains */
1128 struct  ssl_excert_st
1129         {
1130         int certform;
1131         const char *certfile;
1132         int keyform;
1133         const char *keyfile;
1134         const char *chainfile;
1135         X509 *cert;
1136         EVP_PKEY *key;
1137         STACK_OF(X509) *chain;
1138         int build_chain;
1139         struct ssl_excert_st *next, *prev;
1140         };
1141
1142 struct chain_flags
1143         {
1144         int flag;
1145         const char *name;
1146         };
1147
1148 struct chain_flags chain_flags_list[] =
1149         {
1150                 {CERT_PKEY_VALID, "Overall Validity"},
1151                 {CERT_PKEY_SIGN,  "Sign with EE key"},
1152                 {CERT_PKEY_EE_SIGNATURE, "EE signature"},
1153                 {CERT_PKEY_CA_SIGNATURE, "CA signature"},
1154                 {CERT_PKEY_EE_PARAM, "EE key parameters"},
1155                 {CERT_PKEY_CA_PARAM, "CA key parameters"},
1156                 {CERT_PKEY_EXPLICIT_SIGN,  "Explicity sign with EE key"},
1157                 {CERT_PKEY_ISSUER_NAME,  "Issuer Name"},
1158                 {CERT_PKEY_CERT_TYPE,  "Certificate Type"},
1159                 {0, NULL}
1160         };
1161
1162
1163 static void print_chain_flags(BIO *out, int flags)
1164         {
1165         struct chain_flags *ctmp = chain_flags_list;
1166         while(ctmp->name)
1167                 {
1168                 BIO_printf(out, "\t%s: %s\n", ctmp->name,
1169                                 flags & ctmp->flag ? "OK" : "NOT OK");
1170                 ctmp++;
1171                 }
1172         }
1173
1174 /* Very basic selection callback: just use any certificate chain
1175  * reported as valid. More sophisticated could prioritise according
1176  * to local policy.
1177  */
1178 static int set_cert_cb(SSL *ssl, void *arg)
1179         {
1180         int i, rv;
1181         SSL_EXCERT *exc = arg;
1182         SSL_certs_clear(ssl);
1183
1184         if (!exc)
1185                 return 1;
1186
1187         /* Go to end of list and traverse backwards since we prepend
1188          * newer entries this retains the original order.
1189          */
1190         while (exc->next)
1191                 exc = exc->next;
1192
1193         i = 0;
1194
1195         while(exc)
1196                 {
1197                 i++;
1198                 rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
1199                 BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
1200                 X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
1201                                                         XN_FLAG_ONELINE);
1202                 BIO_puts(bio_err, "\n");
1203
1204                 print_chain_flags(bio_err, rv);
1205                 if (rv & CERT_PKEY_VALID)
1206                         {
1207                         SSL_use_certificate(ssl, exc->cert);
1208                         SSL_use_PrivateKey(ssl, exc->key);
1209                         /* NB: we wouldn't normally do this as it is
1210                          * not efficient building chains on each connection
1211                          * better to cache the chain in advance.
1212                          */
1213                         if (exc->build_chain)
1214                                 {
1215                                 if (!SSL_build_cert_chain(ssl, 0))
1216                                         return 0;
1217                                 }
1218                         else if (exc->chain)
1219                                 SSL_set1_chain(ssl, exc->chain);
1220                         }
1221                 exc = exc->prev;
1222                 }
1223         return 1;
1224         }
1225
1226 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
1227         {
1228         SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
1229         }
1230
1231 static int ssl_excert_prepend(SSL_EXCERT **pexc)
1232         {
1233         SSL_EXCERT *exc;
1234         exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
1235         if (!exc)
1236                 return 0;
1237         exc->certfile = NULL;
1238         exc->keyfile = NULL;
1239         exc->chainfile = NULL;
1240         exc->cert = NULL;
1241         exc->key = NULL;
1242         exc->chain = NULL;
1243         exc->prev = NULL;
1244         exc->build_chain = 0;
1245
1246         exc->next = *pexc;
1247         *pexc = exc;
1248
1249         if (exc->next)
1250                 {
1251                 exc->certform = exc->next->certform;
1252                 exc->keyform = exc->next->keyform;
1253                 exc->next->prev = exc;
1254                 }
1255         else
1256                 {
1257                 exc->certform = FORMAT_PEM;
1258                 exc->keyform = FORMAT_PEM;
1259                 }
1260         return 1;
1261
1262         }
1263
1264 void ssl_excert_free(SSL_EXCERT *exc)
1265         {
1266         SSL_EXCERT *curr;
1267         while (exc)
1268                 {
1269                 if (exc->cert)
1270                         X509_free(exc->cert);
1271                 if (exc->key)
1272                         EVP_PKEY_free(exc->key);
1273                 if (exc->chain)
1274                         sk_X509_pop_free(exc->chain, X509_free);
1275                 curr = exc;
1276                 exc = exc->next;
1277                 OPENSSL_free(curr);
1278                 }
1279         }
1280
1281 int load_excert(SSL_EXCERT **pexc, BIO *err)
1282         {
1283         SSL_EXCERT *exc = *pexc;
1284         if (!exc)
1285                 return 1;
1286         /* If nothing in list, free and set to NULL */
1287         if (!exc->certfile && !exc->next)
1288                 {
1289                 ssl_excert_free(exc);
1290                 *pexc = NULL;
1291                 return 1;
1292                 }
1293         for(; exc; exc=exc->next)
1294                 {
1295                 if (!exc->certfile)
1296                         {
1297                         BIO_printf(err, "Missing filename\n");
1298                         return 0;
1299                         }
1300                 exc->cert = load_cert(err, exc->certfile, exc->certform,
1301                                         NULL, NULL, "Server Certificate");
1302                 if (!exc->cert)
1303                         return 0;
1304                 if (exc->keyfile)
1305                         exc->keyfile = exc->certfile;
1306                 exc->key = load_key(err, exc->certfile, exc->certform, 0,
1307                                         NULL, NULL, "Server Certificate");
1308                 if (!exc->key)
1309                         return 0;
1310                 if (exc->chainfile)
1311                         {
1312                         exc->chain = load_certs(err,
1313                                                 exc->chainfile, FORMAT_PEM,
1314                                                 NULL, NULL,
1315                                                 "Server Chain");
1316                         if (!exc->chainfile)
1317                                 return 0;
1318                         }
1319                 }
1320         return 1;
1321         }
1322
1323
1324 int args_excert(char ***pargs, int *pargc,
1325                         int *badarg, BIO *err, SSL_EXCERT **pexc)
1326         {
1327         char *arg = **pargs, *argn = (*pargs)[1];
1328         SSL_EXCERT *exc = *pexc;
1329         int narg = 2;
1330         if (!exc)
1331                 {
1332                 if (ssl_excert_prepend(&exc))
1333                         *pexc = exc;
1334                 else
1335                         {
1336                         BIO_printf(err, "Error initialising xcert\n");
1337                         *badarg = 1;
1338                         goto err;
1339                         }
1340                 }
1341         if (strcmp(arg, "-xcert") == 0)
1342                 {
1343                 if (!argn)
1344                         {
1345                         *badarg = 1;
1346                         return 1;
1347                         }
1348                 if (exc->certfile && !ssl_excert_prepend(&exc))
1349                         {
1350                         BIO_printf(err, "Error adding xcert\n");
1351                         *badarg = 1;
1352                         goto err;
1353                         }
1354                 exc->certfile = argn;
1355                 }
1356         else if (strcmp(arg,"-xkey") == 0)
1357                 {
1358                 if (!argn)
1359                         {
1360                         *badarg = 1;
1361                         return 1;
1362                         }
1363                 if (exc->keyfile)
1364                         {
1365                         BIO_printf(err, "Key already specified\n");
1366                         *badarg = 1;
1367                         return 1;
1368                         }
1369                 exc->keyfile = argn;
1370                 }
1371         else if (strcmp(arg,"-xchain") == 0)
1372                 {
1373                 if (!argn)
1374                         {
1375                         *badarg = 1;
1376                         return 1;
1377                         }
1378                 if (exc->chainfile)
1379                         {
1380                         BIO_printf(err, "Chain already specified\n");
1381                         *badarg = 1;
1382                         return 1;
1383                         }
1384                 exc->chainfile = argn;
1385                 }
1386         else if (strcmp(arg,"-xchain_build") == 0)
1387                 {
1388                 narg = 1;
1389                 exc->build_chain = 1;
1390                 }
1391         else if (strcmp(arg,"-xcertform") == 0)
1392                 {
1393                 if (!argn)
1394                         {
1395                         *badarg = 1;
1396                         goto err;
1397                         }
1398                 exc->certform = str2fmt(argn);
1399                 }
1400         else if (strcmp(arg,"-xkeyform") == 0)
1401                 {
1402                 if (!argn)
1403                         {
1404                         *badarg = 1;
1405                         goto err;
1406                         }
1407                 exc->keyform = str2fmt(argn);
1408                 }
1409         else
1410                 return 0;
1411
1412         (*pargs) += narg;
1413
1414         if (pargc)
1415                 *pargc -= narg;
1416
1417         *pexc = exc;
1418
1419         return 1;
1420
1421         err:
1422         ERR_print_errors(err);
1423         ssl_excert_free(exc);
1424         *pexc = NULL;
1425         return 1;
1426         }
1427