crypto/openssl/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) 1998-2001 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 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 130 int cookie_initialized=0;
 131
 132 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 133         {
 134         char buf[256];
 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         X509_NAME_oneline(X509_get_subject_name(err_cert),buf,sizeof buf);
 143         BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
 144         if (!ok)
 145                 {
 146                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 147                         X509_verify_cert_error_string(err));
 148                 if (verify_depth >= depth)
 149                         {
 150                         ok=1;
 151                         verify_error=X509_V_OK;
 152                         }
 153                 else
 154                         {
 155                         ok=0;
 156                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
 157                         }
 158                 }
 159         switch (ctx->error)
 160                 {
 161         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 162                 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,sizeof buf);
 163                 BIO_printf(bio_err,"issuer= %s\n",buf);
 164                 break;
 165         case X509_V_ERR_CERT_NOT_YET_VALID:
 166         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 167                 BIO_printf(bio_err,"notBefore=");
 168                 ASN1_TIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
 169                 BIO_printf(bio_err,"\n");
 170                 break;
 171         case X509_V_ERR_CERT_HAS_EXPIRED:
 172         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 173                 BIO_printf(bio_err,"notAfter=");
 174                 ASN1_TIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
 175                 BIO_printf(bio_err,"\n");
 176                 break;
 177                 }
 178         BIO_printf(bio_err,"verify return:%d\n",ok);
 179         return(ok);
 180         }
 181
 182 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 183         {
 184         if (cert_file != NULL)
 185                 {
 186                 /*
 187                 SSL *ssl;
 188                 X509 *x509;
 189                 */
 190
 191                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
 192                         SSL_FILETYPE_PEM) <= 0)
 193                         {
 194                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
 195                         ERR_print_errors(bio_err);
 196                         return(0);
 197                         }
 198                 if (key_file == NULL) key_file=cert_file;
 199                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
 200                         SSL_FILETYPE_PEM) <= 0)
 201                         {
 202                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
 203                         ERR_print_errors(bio_err);
 204                         return(0);
 205                         }
 206
 207                 /*
 208                 In theory this is no longer needed
 209                 ssl=SSL_new(ctx);
 210                 x509=SSL_get_certificate(ssl);
 211
 212                 if (x509 != NULL) {
 213                         EVP_PKEY *pktmp;
 214                         pktmp = X509_get_pubkey(x509);
 215                         EVP_PKEY_copy_parameters(pktmp,
 216                                                 SSL_get_privatekey(ssl));
 217                         EVP_PKEY_free(pktmp);
 218                 }
 219                 SSL_free(ssl);
 220                 */
 221
 222                 /* If we are using DSA, we can copy the parameters from
 223                  * the private key */
 224
 225
 226                 /* Now we know that a key and cert have been set against
 227                  * the SSL context */
 228                 if (!SSL_CTX_check_private_key(ctx))
 229                         {
 230                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 231                         return(0);
 232                         }
 233                 }
 234         return(1);
 235         }
 236
 237 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
 238         {
 239         if (cert ==  NULL)
 240                 return 1;
 241         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
 242                 {
 243                 BIO_printf(bio_err,"error setting certificate\n");
 244                 ERR_print_errors(bio_err);
 245                 return 0;
 246                 }
 247         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
 248                 {
 249                 BIO_printf(bio_err,"error setting private key\n");
 250                 ERR_print_errors(bio_err);
 251                 return 0;
 252                 }
 253
 254
 255                 /* Now we know that a key and cert have been set against
 256                  * the SSL context */
 257         if (!SSL_CTX_check_private_key(ctx))
 258                 {
 259                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 260                 return 0;
 261                 }
 262         return 1;
 263         }
 264
 265 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 266         int argi, long argl, long ret)
 267         {
 268         BIO *out;
 269
 270         out=(BIO *)BIO_get_callback_arg(bio);
 271         if (out == NULL) return(ret);
 272
 273         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 274                 {
 275                 BIO_printf(out,"read from %p [%p] (%d bytes => %ld (0x%lX))\n",
 276                         (void *)bio,argp,argi,ret,ret);
 277                 BIO_dump(out,argp,(int)ret);
 278                 return(ret);
 279                 }
 280         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 281                 {
 282                 BIO_printf(out,"write to %p [%p] (%d bytes => %ld (0x%lX))\n",
 283                         (void *)bio,argp,argi,ret,ret);
 284                 BIO_dump(out,argp,(int)ret);
 285                 }
 286         return(ret);
 287         }
 288
 289 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 290         {
 291         const char *str;
 292         int w;
 293
 294         w=where& ~SSL_ST_MASK;
 295
 296         if (w & SSL_ST_CONNECT) str="SSL_connect";
 297         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 298         else str="undefined";
 299
 300         if (where & SSL_CB_LOOP)
 301                 {
 302                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 303                 }
 304         else if (where & SSL_CB_ALERT)
 305                 {
 306                 str=(where & SSL_CB_READ)?"read":"write";
 307                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 308                         str,
 309                         SSL_alert_type_string_long(ret),
 310                         SSL_alert_desc_string_long(ret));
 311                 }
 312         else if (where & SSL_CB_EXIT)
 313                 {
 314                 if (ret == 0)
 315                         BIO_printf(bio_err,"%s:failed in %s\n",
 316                                 str,SSL_state_string_long(s));
 317                 else if (ret < 0)
 318                         {
 319                         BIO_printf(bio_err,"%s:error in %s\n",
 320                                 str,SSL_state_string_long(s));
 321                         }
 322                 }
 323         }
 324
 325
 326 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 327         {
 328         BIO *bio = arg;
 329         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 330
 331         str_write_p = write_p ? ">>>" : "<<<";
 332
 333         switch (version)
 334                 {
 335         case SSL2_VERSION:
 336                 str_version = "SSL 2.0";
 337                 break;
 338         case SSL3_VERSION:
 339                 str_version = "SSL 3.0 ";
 340                 break;
 341         case TLS1_VERSION:
 342                 str_version = "TLS 1.0 ";
 343                 break;
 344         default:
 345                 str_version = "???";
 346         case DTLS1_VERSION:
 347                 str_version = "DTLS 1.0 ";
 348                 break;
 349         case DTLS1_BAD_VER:
 350                 str_version = "DTLS 1.0 (bad) ";
 351                 break;
 352                 }
 353
 354         if (version == SSL2_VERSION)
 355                 {
 356                 str_details1 = "???";
 357
 358                 if (len > 0)
 359                         {
 360                         switch (((const unsigned char*)buf)[0])
 361                                 {
 362                                 case 0:
 363                                         str_details1 = ", ERROR:";
 364                                         str_details2 = " ???";
 365                                         if (len >= 3)
 366                                                 {
 367                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 368
 369                                                 switch (err)
 370                                                         {
 371                                                 case 0x0001:
 372                                                         str_details2 = " NO-CIPHER-ERROR";
 373                                                         break;
 374                                                 case 0x0002:
 375                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 376                                                         break;
 377                                                 case 0x0004:
 378                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 379                                                         break;
 380                                                 case 0x0006:
 381                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 382                                                         break;
 383                                                         }
 384                                                 }
 385
 386                                         break;
 387                                 case 1:
 388                                         str_details1 = ", CLIENT-HELLO";
 389                                         break;
 390                                 case 2:
 391                                         str_details1 = ", CLIENT-MASTER-KEY";
 392                                         break;
 393                                 case 3:
 394                                         str_details1 = ", CLIENT-FINISHED";
 395                                         break;
 396                                 case 4:
 397                                         str_details1 = ", SERVER-HELLO";
 398                                         break;
 399                                 case 5:
 400                                         str_details1 = ", SERVER-VERIFY";
 401                                         break;
 402                                 case 6:
 403                                         str_details1 = ", SERVER-FINISHED";
 404                                         break;
 405                                 case 7:
 406                                         str_details1 = ", REQUEST-CERTIFICATE";
 407                                         break;
 408                                 case 8:
 409                                         str_details1 = ", CLIENT-CERTIFICATE";
 410                                         break;
 411                                 }
 412                         }
 413                 }
 414
 415         if (version == SSL3_VERSION ||
 416             version == TLS1_VERSION ||
 417             version == DTLS1_VERSION ||
 418             version == DTLS1_BAD_VER)
 419                 {
 420                 switch (content_type)
 421                         {
 422                 case 20:
 423                         str_content_type = "ChangeCipherSpec";
 424                         break;
 425                 case 21:
 426                         str_content_type = "Alert";
 427                         break;
 428                 case 22:
 429                         str_content_type = "Handshake";
 430                         break;
 431                         }
 432
 433                 if (content_type == 21) /* Alert */
 434                         {
 435                         str_details1 = ", ???";
 436
 437                         if (len == 2)
 438                                 {
 439                                 switch (((const unsigned char*)buf)[0])
 440                                         {
 441                                 case 1:
 442                                         str_details1 = ", warning";
 443                                         break;
 444                                 case 2:
 445                                         str_details1 = ", fatal";
 446                                         break;
 447                                         }
 448
 449                                 str_details2 = " ???";
 450                                 switch (((const unsigned char*)buf)[1])
 451                                         {
 452                                 case 0:
 453                                         str_details2 = " close_notify";
 454                                         break;
 455                                 case 10:
 456                                         str_details2 = " unexpected_message";
 457                                         break;
 458                                 case 20:
 459                                         str_details2 = " bad_record_mac";
 460                                         break;
 461                                 case 21:
 462                                         str_details2 = " decryption_failed";
 463                                         break;
 464                                 case 22:
 465                                         str_details2 = " record_overflow";
 466                                         break;
 467                                 case 30:
 468                                         str_details2 = " decompression_failure";
 469                                         break;
 470                                 case 40:
 471                                         str_details2 = " handshake_failure";
 472                                         break;
 473                                 case 42:
 474                                         str_details2 = " bad_certificate";
 475                                         break;
 476                                 case 43:
 477                                         str_details2 = " unsupported_certificate";
 478                                         break;
 479                                 case 44:
 480                                         str_details2 = " certificate_revoked";
 481                                         break;
 482                                 case 45:
 483                                         str_details2 = " certificate_expired";
 484                                         break;
 485                                 case 46:
 486                                         str_details2 = " certificate_unknown";
 487                                         break;
 488                                 case 47:
 489                                         str_details2 = " illegal_parameter";
 490                                         break;
 491                                 case 48:
 492                                         str_details2 = " unknown_ca";
 493                                         break;
 494                                 case 49:
 495                                         str_details2 = " access_denied";
 496                                         break;
 497                                 case 50:
 498                                         str_details2 = " decode_error";
 499                                         break;
 500                                 case 51:
 501                                         str_details2 = " decrypt_error";
 502                                         break;
 503                                 case 60:
 504                                         str_details2 = " export_restriction";
 505                                         break;
 506                                 case 70:
 507                                         str_details2 = " protocol_version";
 508                                         break;
 509                                 case 71:
 510                                         str_details2 = " insufficient_security";
 511                                         break;
 512                                 case 80:
 513                                         str_details2 = " internal_error";
 514                                         break;
 515                                 case 90:
 516                                         str_details2 = " user_canceled";
 517                                         break;
 518                                 case 100:
 519                                         str_details2 = " no_renegotiation";
 520                                         break;
 521                                         }
 522                                 }
 523                         }
 524
 525                 if (content_type == 22) /* Handshake */
 526                         {
 527                         str_details1 = "???";
 528
 529                         if (len > 0)
 530                                 {
 531                                 switch (((const unsigned char*)buf)[0])
 532                                         {
 533                                 case 0:
 534                                         str_details1 = ", HelloRequest";
 535                                         break;
 536                                 case 1:
 537                                         str_details1 = ", ClientHello";
 538                                         break;
 539                                 case 2:
 540                                         str_details1 = ", ServerHello";
 541                                         break;
 542                                 case 11:
 543                                         str_details1 = ", Certificate";
 544                                         break;
 545                                 case 12:
 546                                         str_details1 = ", ServerKeyExchange";
 547                                         break;
 548                                 case 13:
 549                                         str_details1 = ", CertificateRequest";
 550                                         break;
 551                                 case 14:
 552                                         str_details1 = ", ServerHelloDone";
 553                                         break;
 554                                 case 15:
 555                                         str_details1 = ", CertificateVerify";
 556                                         break;
 557                                 case 3:
 558                                         str_details1 = ", HelloVerifyRequest";
 559                                         break;
 560                                 case 16:
 561                                         str_details1 = ", ClientKeyExchange";
 562                                         break;
 563                                 case 20:
 564                                         str_details1 = ", Finished";
 565                                         break;
 566                                         }
 567                                 }
 568                         }
 569                 }
 570
 571         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);
 572
 573         if (len > 0)
 574                 {
 575                 size_t num, i;
 576
 577                 BIO_printf(bio, "   ");
 578                 num = len;
 579 #if 0
 580                 if (num > 16)
 581                         num = 16;
 582 #endif
 583                 for (i = 0; i < num; i++)
 584                         {
 585                         if (i % 16 == 0 && i > 0)
 586                                 BIO_printf(bio, "\n   ");
 587                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 588                         }
 589                 if (i < len)
 590                         BIO_printf(bio, " ...");
 591                 BIO_printf(bio, "\n");
 592                 }
 593         (void)BIO_flush(bio);
 594         }
 595
 596 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 597                                         unsigned char *data, int len,
 598                                         void *arg)
 599         {
 600         BIO *bio = arg;
 601         char *extname;
 602
 603         switch(type)
 604                 {
 605                 case TLSEXT_TYPE_server_name:
 606                 extname = "server name";
 607                 break;
 608
 609                 case TLSEXT_TYPE_max_fragment_length:
 610                 extname = "max fragment length";
 611                 break;
 612
 613                 case TLSEXT_TYPE_client_certificate_url:
 614                 extname = "client certificate URL";
 615                 break;
 616
 617                 case TLSEXT_TYPE_trusted_ca_keys:
 618                 extname = "trusted CA keys";
 619                 break;
 620
 621                 case TLSEXT_TYPE_truncated_hmac:
 622                 extname = "truncated HMAC";
 623                 break;
 624
 625                 case TLSEXT_TYPE_status_request:
 626                 extname = "status request";
 627                 break;
 628
 629                 case TLSEXT_TYPE_elliptic_curves:
 630                 extname = "elliptic curves";
 631                 break;
 632
 633                 case TLSEXT_TYPE_ec_point_formats:
 634                 extname = "EC point formats";
 635                 break;
 636
 637                 case TLSEXT_TYPE_session_ticket:
 638                 extname = "server ticket";
 639                 break;
 640
 641                 case TLSEXT_TYPE_renegotiate:
 642                 extname = "renegotiate";
 643                 break;
 644
 645                 default:
 646                 extname = "unknown";
 647                 break;
 648
 649                 }
 650
 651         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 652                         client_server ? "server": "client",
 653                         extname, type, len);
 654         BIO_dump(bio, (char *)data, len);
 655         (void)BIO_flush(bio);
 656         }
 657
 658 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
 659         {
 660         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 661         unsigned int length, resultlength;
 662         struct sockaddr_in peer;
 663
 664         /* Initialize a random secret */
 665         if (!cookie_initialized)
 666                 {
 667                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
 668                         {
 669                         BIO_printf(bio_err,"error setting random cookie secret\n");
 670                         return 0;
 671                         }
 672                 cookie_initialized = 1;
 673                 }
 674
 675         /* Read peer information */
 676         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 677
 678         /* Create buffer with peer's address and port */
 679         length = sizeof(peer.sin_addr);
 680         length += sizeof(peer.sin_port);
 681         buffer = OPENSSL_malloc(length);
 682
 683         if (buffer == NULL)
 684                 {
 685                 BIO_printf(bio_err,"out of memory\n");
 686                 return 0;
 687                 }
 688
 689         memcpy(buffer, &peer.sin_addr, sizeof(peer.sin_addr));
 690         memcpy(buffer + sizeof(peer.sin_addr), &peer.sin_port, sizeof(peer.sin_port));
 691
 692         /* Calculate HMAC of buffer using the secret */
 693         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 694              buffer, length, result, &resultlength);
 695         OPENSSL_free(buffer);
 696
 697         memcpy(cookie, result, resultlength);
 698         *cookie_len = resultlength;
 699
 700         return 1;
 701         }
 702
 703 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
 704         {
 705         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 706         unsigned int length, resultlength;
 707         struct sockaddr_in peer;
 708
 709         /* If secret isn't initialized yet, the cookie can't be valid */
 710         if (!cookie_initialized)
 711                 return 0;
 712
 713         /* Read peer information */
 714         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 715
 716         /* Create buffer with peer's address and port */
 717         length = sizeof(peer.sin_addr);
 718         length += sizeof(peer.sin_port);
 719         buffer = (unsigned char*) OPENSSL_malloc(length);
 720
 721         if (buffer == NULL)
 722                 {
 723                 BIO_printf(bio_err,"out of memory\n");
 724                 return 0;
 725                 }
 726
 727         memcpy(buffer, &peer.sin_addr, sizeof(peer.sin_addr));
 728         memcpy(buffer + sizeof(peer.sin_addr), &peer.sin_port, sizeof(peer.sin_port));
 729
 730         /* Calculate HMAC of buffer using the secret */
 731         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 732              buffer, length, result, &resultlength);
 733         OPENSSL_free(buffer);
 734
 735         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
 736                 return 1;
 737
 738         return 0;
 739         }