crypto/external/bsd/openssl/dist/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 #include <string.h> /* for memcpy() */
 115 #define USE_SOCKETS
 116 #define NON_MAIN
 117 #include "apps.h"
 118 #undef NON_MAIN
 119 #undef USE_SOCKETS
 120 #include <openssl/err.h>
 121 #include <openssl/rand.h>
 122 #include <openssl/x509.h>
 123 #include <openssl/ssl.h>
 124 #include "s_apps.h"
 125
 126 #define COOKIE_SECRET_LENGTH    16
 127
 128 int verify_depth = 0;
 129 int verify_error = X509_V_OK;
 130 int verify_return_error = 0;
 131 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 132 int cookie_initialized = 0;
 133
 134 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 135 {
 136     X509 *err_cert;
 137     int err, depth;
 138
 139     err_cert = X509_STORE_CTX_get_current_cert(ctx);
 140     err = X509_STORE_CTX_get_error(ctx);
 141     depth = X509_STORE_CTX_get_error_depth(ctx);
 142
 143     BIO_printf(bio_err, "depth=%d ", depth);
 144     if (err_cert) {
 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     } else
 149         BIO_puts(bio_err, "<no cert>\n");
 150     if (!ok) {
 151         BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
 152                    X509_verify_cert_error_string(err));
 153         if (verify_depth >= depth) {
 154             if (!verify_return_error)
 155                 ok = 1;
 156             verify_error = X509_V_OK;
 157         } else {
 158             ok = 0;
 159             verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
 160         }
 161     }
 162     switch (err) {
 163     case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 164         BIO_puts(bio_err, "issuer= ");
 165         X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
 166                            0, XN_FLAG_ONELINE);
 167         BIO_puts(bio_err, "\n");
 168         break;
 169     case X509_V_ERR_CERT_NOT_YET_VALID:
 170     case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 171         BIO_printf(bio_err, "notBefore=");
 172         ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert));
 173         BIO_printf(bio_err, "\n");
 174         break;
 175     case X509_V_ERR_CERT_HAS_EXPIRED:
 176     case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 177         BIO_printf(bio_err, "notAfter=");
 178         ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert));
 179         BIO_printf(bio_err, "\n");
 180         break;
 181     case X509_V_ERR_NO_EXPLICIT_POLICY:
 182         policies_print(bio_err, ctx);
 183         break;
 184     }
 185     if (err == X509_V_OK && ok == 2)
 186         policies_print(bio_err, ctx);
 187
 188     BIO_printf(bio_err, "verify return:%d\n", ok);
 189     return (ok);
 190 }
 191
 192 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 193 {
 194     if (cert_file != NULL) {
 195         /*-
 196         SSL *ssl;
 197         X509 *x509;
 198         */
 199
 200         if (SSL_CTX_use_certificate_file(ctx, cert_file,
 201                                          SSL_FILETYPE_PEM) <= 0) {
 202             BIO_printf(bio_err, "unable to get certificate from '%s'\n",
 203                        cert_file);
 204             ERR_print_errors(bio_err);
 205             return (0);
 206         }
 207         if (key_file == NULL)
 208             key_file = cert_file;
 209         if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) {
 210             BIO_printf(bio_err, "unable to get private key from '%s'\n",
 211                        key_file);
 212             ERR_print_errors(bio_err);
 213             return (0);
 214         }
 215
 216         /*-
 217         In theory this is no longer needed
 218         ssl=SSL_new(ctx);
 219         x509=SSL_get_certificate(ssl);
 220
 221         if (x509 != NULL) {
 222                 EVP_PKEY *pktmp;
 223                 pktmp = X509_get_pubkey(x509);
 224                 EVP_PKEY_copy_parameters(pktmp,
 225                                         SSL_get_privatekey(ssl));
 226                 EVP_PKEY_free(pktmp);
 227         }
 228         SSL_free(ssl);
 229         */
 230
 231         /*
 232          * If we are using DSA, we can copy the parameters from the private
 233          * key
 234          */
 235
 236         /*
 237          * Now we know that a key and cert have been set against the SSL
 238          * context
 239          */
 240         if (!SSL_CTX_check_private_key(ctx)) {
 241             BIO_printf(bio_err,
 242                        "Private key does not match the certificate public key\n");
 243             return (0);
 244         }
 245     }
 246     return (1);
 247 }
 248
 249 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
 250 {
 251     if (cert == NULL)
 252         return 1;
 253     if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
 254         BIO_printf(bio_err, "error setting certificate\n");
 255         ERR_print_errors(bio_err);
 256         return 0;
 257     }
 258     if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
 259         BIO_printf(bio_err, "error setting private key\n");
 260         ERR_print_errors(bio_err);
 261         return 0;
 262     }
 263
 264     /*
 265      * Now we know that a key and cert have been set against the SSL context
 266      */
 267     if (!SSL_CTX_check_private_key(ctx)) {
 268         BIO_printf(bio_err,
 269                    "Private key does not match the certificate public key\n");
 270         return 0;
 271     }
 272     return 1;
 273 }
 274
 275 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 276                                    int argi, long argl, long ret)
 277 {
 278     BIO *out;
 279
 280     out = (BIO *)BIO_get_callback_arg(bio);
 281     if (out == NULL)
 282         return (ret);
 283
 284     if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 285         BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 286                    (void *)bio, argp, (unsigned long)argi, ret, ret);
 287         BIO_dump(out, argp, (int)ret);
 288         return (ret);
 289     } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 290         BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 291                    (void *)bio, argp, (unsigned long)argi, ret, ret);
 292         BIO_dump(out, argp, (int)ret);
 293     }
 294     return (ret);
 295 }
 296
 297 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 298 {
 299     const char *str;
 300     int w;
 301
 302     w = where & ~SSL_ST_MASK;
 303
 304     if (w & SSL_ST_CONNECT)
 305         str = "SSL_connect";
 306     else if (w & SSL_ST_ACCEPT)
 307         str = "SSL_accept";
 308     else
 309         str = "undefined";
 310
 311     if (where & SSL_CB_LOOP) {
 312         BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 313     } else if (where & SSL_CB_ALERT) {
 314         str = (where & SSL_CB_READ) ? "read" : "write";
 315         BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
 316                    str,
 317                    SSL_alert_type_string_long(ret),
 318                    SSL_alert_desc_string_long(ret));
 319     } else if (where & SSL_CB_EXIT) {
 320         if (ret == 0)
 321             BIO_printf(bio_err, "%s:failed in %s\n",
 322                        str, SSL_state_string_long(s));
 323         else if (ret < 0) {
 324             BIO_printf(bio_err, "%s:error in %s\n",
 325                        str, SSL_state_string_long(s));
 326         }
 327     }
 328 }
 329
 330 void MS_CALLBACK msg_cb(int write_p, int version, int content_type,
 331                         const void *buf, size_t len, SSL *ssl, void *arg)
 332 {
 333     BIO *bio = arg;
 334     const char *str_write_p, *str_version, *str_content_type =
 335         "", *str_details1 = "", *str_details2 = "";
 336
 337     str_write_p = write_p ? ">>>" : "<<<";
 338
 339     switch (version) {
 340     case SSL2_VERSION:
 341         str_version = "SSL 2.0";
 342         break;
 343     case SSL3_VERSION:
 344         str_version = "SSL 3.0 ";
 345         break;
 346     case TLS1_VERSION:
 347         str_version = "TLS 1.0 ";
 348         break;
 349     case TLS1_1_VERSION:
 350         str_version = "TLS 1.1 ";
 351         break;
 352     case TLS1_2_VERSION:
 353         str_version = "TLS 1.2 ";
 354         break;
 355     case DTLS1_VERSION:
 356         str_version = "DTLS 1.0 ";
 357         break;
 358     case DTLS1_BAD_VER:
 359         str_version = "DTLS 1.0 (bad) ";
 360         break;
 361     default:
 362         str_version = "???";
 363     }
 364
 365     if (version == SSL2_VERSION) {
 366         str_details1 = "???";
 367
 368         if (len > 0) {
 369             switch (((const unsigned char *)buf)[0]) {
 370             case 0:
 371                 str_details1 = ", ERROR:";
 372                 str_details2 = " ???";
 373                 if (len >= 3) {
 374                     unsigned err =
 375                         (((const unsigned char *)buf)[1] << 8) +
 376                         ((const unsigned char *)buf)[2];
 377
 378                     switch (err) {
 379                     case 0x0001:
 380                         str_details2 = " NO-CIPHER-ERROR";
 381                         break;
 382                     case 0x0002:
 383                         str_details2 = " NO-CERTIFICATE-ERROR";
 384                         break;
 385                     case 0x0004:
 386                         str_details2 = " BAD-CERTIFICATE-ERROR";
 387                         break;
 388                     case 0x0006:
 389                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 390                         break;
 391                     }
 392                 }
 393
 394                 break;
 395             case 1:
 396                 str_details1 = ", CLIENT-HELLO";
 397                 break;
 398             case 2:
 399                 str_details1 = ", CLIENT-MASTER-KEY";
 400                 break;
 401             case 3:
 402                 str_details1 = ", CLIENT-FINISHED";
 403                 break;
 404             case 4:
 405                 str_details1 = ", SERVER-HELLO";
 406                 break;
 407             case 5:
 408                 str_details1 = ", SERVER-VERIFY";
 409                 break;
 410             case 6:
 411                 str_details1 = ", SERVER-FINISHED";
 412                 break;
 413             case 7:
 414                 str_details1 = ", REQUEST-CERTIFICATE";
 415                 break;
 416             case 8:
 417                 str_details1 = ", CLIENT-CERTIFICATE";
 418                 break;
 419             }
 420         }
 421     }
 422
 423     if (version == SSL3_VERSION ||
 424         version == TLS1_VERSION ||
 425         version == TLS1_1_VERSION ||
 426         version == TLS1_2_VERSION ||
 427         version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
 428         switch (content_type) {
 429         case 20:
 430             str_content_type = "ChangeCipherSpec";
 431             break;
 432         case 21:
 433             str_content_type = "Alert";
 434             break;
 435         case 22:
 436             str_content_type = "Handshake";
 437             break;
 438         }
 439
 440         if (content_type == 21) { /* Alert */
 441             str_details1 = ", ???";
 442
 443             if (len == 2) {
 444                 switch (((const unsigned char *)buf)[0]) {
 445                 case 1:
 446                     str_details1 = ", warning";
 447                     break;
 448                 case 2:
 449                     str_details1 = ", fatal";
 450                     break;
 451                 }
 452
 453                 str_details2 = " ???";
 454                 switch (((const unsigned char *)buf)[1]) {
 455                 case 0:
 456                     str_details2 = " close_notify";
 457                     break;
 458                 case 10:
 459                     str_details2 = " unexpected_message";
 460                     break;
 461                 case 20:
 462                     str_details2 = " bad_record_mac";
 463                     break;
 464                 case 21:
 465                     str_details2 = " decryption_failed";
 466                     break;
 467                 case 22:
 468                     str_details2 = " record_overflow";
 469                     break;
 470                 case 30:
 471                     str_details2 = " decompression_failure";
 472                     break;
 473                 case 40:
 474                     str_details2 = " handshake_failure";
 475                     break;
 476                 case 42:
 477                     str_details2 = " bad_certificate";
 478                     break;
 479                 case 43:
 480                     str_details2 = " unsupported_certificate";
 481                     break;
 482                 case 44:
 483                     str_details2 = " certificate_revoked";
 484                     break;
 485                 case 45:
 486                     str_details2 = " certificate_expired";
 487                     break;
 488                 case 46:
 489                     str_details2 = " certificate_unknown";
 490                     break;
 491                 case 47:
 492                     str_details2 = " illegal_parameter";
 493                     break;
 494                 case 48:
 495                     str_details2 = " unknown_ca";
 496                     break;
 497                 case 49:
 498                     str_details2 = " access_denied";
 499                     break;
 500                 case 50:
 501                     str_details2 = " decode_error";
 502                     break;
 503                 case 51:
 504                     str_details2 = " decrypt_error";
 505                     break;
 506                 case 60:
 507                     str_details2 = " export_restriction";
 508                     break;
 509                 case 70:
 510                     str_details2 = " protocol_version";
 511                     break;
 512                 case 71:
 513                     str_details2 = " insufficient_security";
 514                     break;
 515                 case 80:
 516                     str_details2 = " internal_error";
 517                     break;
 518                 case 90:
 519                     str_details2 = " user_canceled";
 520                     break;
 521                 case 100:
 522                     str_details2 = " no_renegotiation";
 523                     break;
 524                 case 110:
 525                     str_details2 = " unsupported_extension";
 526                     break;
 527                 case 111:
 528                     str_details2 = " certificate_unobtainable";
 529                     break;
 530                 case 112:
 531                     str_details2 = " unrecognized_name";
 532                     break;
 533                 case 113:
 534                     str_details2 = " bad_certificate_status_response";
 535                     break;
 536                 case 114:
 537                     str_details2 = " bad_certificate_hash_value";
 538                     break;
 539                 case 115:
 540                     str_details2 = " unknown_psk_identity";
 541                     break;
 542                 }
 543             }
 544         }
 545
 546         if (content_type == 22) { /* Handshake */
 547             str_details1 = "???";
 548
 549             if (len > 0) {
 550                 switch (((const unsigned char *)buf)[0]) {
 551                 case 0:
 552                     str_details1 = ", HelloRequest";
 553                     break;
 554                 case 1:
 555                     str_details1 = ", ClientHello";
 556                     break;
 557                 case 2:
 558                     str_details1 = ", ServerHello";
 559                     break;
 560                 case 3:
 561                     str_details1 = ", HelloVerifyRequest";
 562                     break;
 563                 case 11:
 564                     str_details1 = ", Certificate";
 565                     break;
 566                 case 12:
 567                     str_details1 = ", ServerKeyExchange";
 568                     break;
 569                 case 13:
 570                     str_details1 = ", CertificateRequest";
 571                     break;
 572                 case 14:
 573                     str_details1 = ", ServerHelloDone";
 574                     break;
 575                 case 15:
 576                     str_details1 = ", CertificateVerify";
 577                     break;
 578                 case 16:
 579                     str_details1 = ", ClientKeyExchange";
 580                     break;
 581                 case 20:
 582                     str_details1 = ", Finished";
 583                     break;
 584                 }
 585             }
 586         }
 587 #ifndef OPENSSL_NO_HEARTBEATS
 588         if (content_type == 24) { /* Heartbeat */
 589             str_details1 = ", Heartbeat";
 590
 591             if (len > 0) {
 592                 switch (((const unsigned char *)buf)[0]) {
 593                 case 1:
 594                     str_details1 = ", HeartbeatRequest";
 595                     break;
 596                 case 2:
 597                     str_details1 = ", HeartbeatResponse";
 598                     break;
 599                 }
 600             }
 601         }
 602 #endif
 603     }
 604
 605     BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
 606                str_content_type, (unsigned long)len, str_details1,
 607                str_details2);
 608
 609     if (len > 0) {
 610         size_t num, i;
 611
 612         BIO_printf(bio, "   ");
 613         num = len;
 614 #if 0
 615         if (num > 16)
 616             num = 16;
 617 #endif
 618         for (i = 0; i < num; i++) {
 619             if (i % 16 == 0 && i > 0)
 620                 BIO_printf(bio, "\n   ");
 621             BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
 622         }
 623         if (i < len)
 624             BIO_printf(bio, " ...");
 625         BIO_printf(bio, "\n");
 626     }
 627     (void)BIO_flush(bio);
 628 }
 629
 630 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 631                            unsigned char *data, int len, void *arg)
 632 {
 633     BIO *bio = arg;
 634     char *extname;
 635
 636     switch (type) {
 637     case TLSEXT_TYPE_server_name:
 638         extname = "server name";
 639         break;
 640
 641     case TLSEXT_TYPE_max_fragment_length:
 642         extname = "max fragment length";
 643         break;
 644
 645     case TLSEXT_TYPE_client_certificate_url:
 646         extname = "client certificate URL";
 647         break;
 648
 649     case TLSEXT_TYPE_trusted_ca_keys:
 650         extname = "trusted CA keys";
 651         break;
 652
 653     case TLSEXT_TYPE_truncated_hmac:
 654         extname = "truncated HMAC";
 655         break;
 656
 657     case TLSEXT_TYPE_status_request:
 658         extname = "status request";
 659         break;
 660
 661     case TLSEXT_TYPE_user_mapping:
 662         extname = "user mapping";
 663         break;
 664
 665     case TLSEXT_TYPE_client_authz:
 666         extname = "client authz";
 667         break;
 668
 669     case TLSEXT_TYPE_server_authz:
 670         extname = "server authz";
 671         break;
 672
 673     case TLSEXT_TYPE_cert_type:
 674         extname = "cert type";
 675         break;
 676
 677     case TLSEXT_TYPE_elliptic_curves:
 678         extname = "elliptic curves";
 679         break;
 680
 681     case TLSEXT_TYPE_ec_point_formats:
 682         extname = "EC point formats";
 683         break;
 684
 685     case TLSEXT_TYPE_srp:
 686         extname = "SRP";
 687         break;
 688
 689     case TLSEXT_TYPE_signature_algorithms:
 690         extname = "signature algorithms";
 691         break;
 692
 693     case TLSEXT_TYPE_use_srtp:
 694         extname = "use SRTP";
 695         break;
 696
 697     case TLSEXT_TYPE_heartbeat:
 698         extname = "heartbeat";
 699         break;
 700
 701     case TLSEXT_TYPE_session_ticket:
 702         extname = "session ticket";
 703         break;
 704
 705     case TLSEXT_TYPE_renegotiate:
 706         extname = "renegotiation info";
 707         break;
 708
 709 #ifdef TLSEXT_TYPE_opaque_prf_input
 710     case TLSEXT_TYPE_opaque_prf_input:
 711         extname = "opaque PRF input";
 712         break;
 713 #endif
 714 #ifdef TLSEXT_TYPE_next_proto_neg
 715     case TLSEXT_TYPE_next_proto_neg:
 716         extname = "next protocol";
 717         break;
 718 #endif
 719
 720     case TLSEXT_TYPE_padding:
 721         extname = "TLS padding";
 722         break;
 723
 724     default:
 725         extname = "unknown";
 726         break;
 727
 728     }
 729
 730     BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 731                client_server ? "server" : "client", extname, type, len);
 732     BIO_dump(bio, (char *)data, len);
 733     (void)BIO_flush(bio);
 734 }
 735
 736 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie,
 737                                          unsigned int *cookie_len)
 738 {
 739     unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 740     unsigned int length, resultlength;
 741     union {
 742         struct sockaddr sa;
 743         struct sockaddr_in s4;
 744 #if OPENSSL_USE_IPV6
 745         struct sockaddr_in6 s6;
 746 #endif
 747     } peer;
 748
 749     /* Initialize a random secret */
 750     if (!cookie_initialized) {
 751         if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
 752             BIO_printf(bio_err, "error setting random cookie secret\n");
 753             return 0;
 754         }
 755         cookie_initialized = 1;
 756     }
 757
 758     /* Read peer information */
 759     (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 760
 761     /* Create buffer with peer's address and port */
 762     length = 0;
 763     switch (peer.sa.sa_family) {
 764     case AF_INET:
 765         length += sizeof(struct in_addr);
 766         length += sizeof(peer.s4.sin_port);
 767         break;
 768 #if OPENSSL_USE_IPV6
 769     case AF_INET6:
 770         length += sizeof(struct in6_addr);
 771         length += sizeof(peer.s6.sin6_port);
 772         break;
 773 #endif
 774     default:
 775         OPENSSL_assert(0);
 776         break;
 777     }
 778     buffer = OPENSSL_malloc(length);
 779
 780     if (buffer == NULL) {
 781         BIO_printf(bio_err, "out of memory\n");
 782         return 0;
 783     }
 784
 785     switch (peer.sa.sa_family) {
 786     case AF_INET:
 787         memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
 788         memcpy(buffer + sizeof(peer.s4.sin_port),
 789                &peer.s4.sin_addr, sizeof(struct in_addr));
 790         break;
 791 #if OPENSSL_USE_IPV6
 792     case AF_INET6:
 793         memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
 794         memcpy(buffer + sizeof(peer.s6.sin6_port),
 795                &peer.s6.sin6_addr, sizeof(struct in6_addr));
 796         break;
 797 #endif
 798     default:
 799         OPENSSL_assert(0);
 800         break;
 801     }
 802
 803     /* Calculate HMAC of buffer using the secret */
 804     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 805          buffer, length, result, &resultlength);
 806     OPENSSL_free(buffer);
 807
 808     memcpy(cookie, result, resultlength);
 809     *cookie_len = resultlength;
 810
 811     return 1;
 812 }
 813
 814 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie,
 815                                        unsigned int cookie_len)
 816 {
 817     unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 818     unsigned int length, resultlength;
 819     union {
 820         struct sockaddr sa;
 821         struct sockaddr_in s4;
 822 #if OPENSSL_USE_IPV6
 823         struct sockaddr_in6 s6;
 824 #endif
 825     } peer;
 826
 827     /* If secret isn't initialized yet, the cookie can't be valid */
 828     if (!cookie_initialized)
 829         return 0;
 830
 831     /* Read peer information */
 832     (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 833
 834     /* Create buffer with peer's address and port */
 835     length = 0;
 836     switch (peer.sa.sa_family) {
 837     case AF_INET:
 838         length += sizeof(struct in_addr);
 839         length += sizeof(peer.s4.sin_port);
 840         break;
 841 #if OPENSSL_USE_IPV6
 842     case AF_INET6:
 843         length += sizeof(struct in6_addr);
 844         length += sizeof(peer.s6.sin6_port);
 845         break;
 846 #endif
 847     default:
 848         OPENSSL_assert(0);
 849         break;
 850     }
 851     buffer = OPENSSL_malloc(length);
 852
 853     if (buffer == NULL) {
 854         BIO_printf(bio_err, "out of memory\n");
 855         return 0;
 856     }
 857
 858     switch (peer.sa.sa_family) {
 859     case AF_INET:
 860         memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
 861         memcpy(buffer + sizeof(peer.s4.sin_port),
 862                &peer.s4.sin_addr, sizeof(struct in_addr));
 863         break;
 864 #if OPENSSL_USE_IPV6
 865     case AF_INET6:
 866         memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
 867         memcpy(buffer + sizeof(peer.s6.sin6_port),
 868                &peer.s6.sin6_addr, sizeof(struct in6_addr));
 869         break;
 870 #endif
 871     default:
 872         OPENSSL_assert(0);
 873         break;
 874     }
 875
 876     /* Calculate HMAC of buffer using the secret */
 877     HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 878          buffer, length, result, &resultlength);
 879     OPENSSL_free(buffer);
 880
 881     if (cookie_len == resultlength
 882         && memcmp(result, cookie, resultlength) == 0)
 883         return 1;
 884
 885     return 0;
 886 }