bin/openssl/s_cb.c

   1 /* $OpenBSD: s_cb.c,v 1.8 2017/08/12 21:04:33 jsing Exp $ */
   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 <sys/socket.h>
 113
 114 #include <netinet/in.h>
 115
 116 #include <netdb.h>
 117 #include <stdio.h>
 118 #include <stdlib.h>
 119 #include <string.h>
 120
 121 #include "apps.h"
 122
 123 #include <openssl/err.h>
 124 #include <openssl/ssl.h>
 125 #include <openssl/x509.h>
 126
 127 #include "s_apps.h"
 128
 129 #define COOKIE_SECRET_LENGTH    16
 130
 131 int verify_depth = 0;
 132 int verify_return_error = 0;
 133 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 134 int cookie_initialized = 0;
 135
 136 int
 137 verify_callback(int ok, X509_STORE_CTX * ctx)
 138 {
 139         X509 *err_cert;
 140         int err, depth;
 141
 142         err_cert = X509_STORE_CTX_get_current_cert(ctx);
 143         err = X509_STORE_CTX_get_error(ctx);
 144         depth = X509_STORE_CTX_get_error_depth(ctx);
 145
 146         BIO_printf(bio_err, "depth=%d ", depth);
 147         if (err_cert) {
 148                 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
 149                     0, XN_FLAG_ONELINE);
 150                 BIO_puts(bio_err, "\n");
 151         } else
 152                 BIO_puts(bio_err, "<no cert>\n");
 153         if (!ok) {
 154                 BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
 155                     X509_verify_cert_error_string(err));
 156                 if (verify_depth >= depth) {
 157                         if (!verify_return_error)
 158                                 ok = 1;
 159                 } else {
 160                         ok = 0;
 161                 }
 162         }
 163         switch (err) {
 164         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 165                 BIO_puts(bio_err, "issuer= ");
 166                 if (err_cert == NULL)
 167                         BIO_puts(bio_err, "<error getting cert>");
 168                 else
 169                         X509_NAME_print_ex(bio_err,
 170                             X509_get_issuer_name(err_cert), 0, XN_FLAG_ONELINE);
 171                 BIO_puts(bio_err, "\n");
 172                 break;
 173         case X509_V_ERR_CERT_NOT_YET_VALID:
 174         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 175                 BIO_printf(bio_err, "notBefore=");
 176                 if (err_cert == NULL)
 177                         BIO_printf(bio_err, " <error getting cert>");
 178                 else
 179                         ASN1_TIME_print(bio_err, X509_get_notBefore(err_cert));
 180                 BIO_printf(bio_err, "\n");
 181                 break;
 182         case X509_V_ERR_CERT_HAS_EXPIRED:
 183         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 184                 BIO_printf(bio_err, "notAfter=");
 185                 if (err_cert == NULL)
 186                         BIO_printf(bio_err, " <error getting cert>");
 187                 else
 188                         ASN1_TIME_print(bio_err, X509_get_notAfter(err_cert));
 189                 BIO_printf(bio_err, "\n");
 190                 break;
 191         case X509_V_ERR_NO_EXPLICIT_POLICY:
 192                 policies_print(bio_err, ctx);
 193                 break;
 194         }
 195         if (err == X509_V_OK && ok == 2)
 196                 policies_print(bio_err, ctx);
 197
 198         BIO_printf(bio_err, "verify return:%d\n", ok);
 199         return (ok);
 200 }
 201
 202 int
 203 set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
 204 {
 205         if (cert_file != NULL) {
 206                 /*
 207                 SSL *ssl;
 208                 X509 *x509;
 209                 */
 210
 211                 if (SSL_CTX_use_certificate_file(ctx, cert_file,
 212                     SSL_FILETYPE_PEM) <= 0) {
 213                         BIO_printf(bio_err,
 214                             "unable to get certificate from '%s'\n", cert_file);
 215                         ERR_print_errors(bio_err);
 216                         return (0);
 217                 }
 218                 if (key_file == NULL)
 219                         key_file = cert_file;
 220                 if (SSL_CTX_use_PrivateKey_file(ctx, key_file,
 221                     SSL_FILETYPE_PEM) <= 0) {
 222                         BIO_printf(bio_err,
 223                             "unable to get private key from '%s'\n", key_file);
 224                         ERR_print_errors(bio_err);
 225                         return (0);
 226                 }
 227                 /*
 228                 In theory this is no longer needed
 229                 ssl=SSL_new(ctx);
 230                 x509=SSL_get_certificate(ssl);
 231
 232                 if (x509 != NULL) {
 233                         EVP_PKEY *pktmp;
 234                         pktmp = X509_get_pubkey(x509);
 235                         EVP_PKEY_copy_parameters(pktmp,
 236                                                 SSL_get_privatekey(ssl));
 237                         EVP_PKEY_free(pktmp);
 238                 }
 239                 SSL_free(ssl);
 240                 */
 241
 242                 /*
 243                  * If we are using DSA, we can copy the parameters from the
 244                  * private key
 245                  */
 246
 247
 248                 /*
 249                  * Now we know that a key and cert have been set against the
 250                  * SSL context
 251                  */
 252                 if (!SSL_CTX_check_private_key(ctx)) {
 253                         BIO_printf(bio_err,
 254                             "Private key does not match the certificate public key\n");
 255                         return (0);
 256                 }
 257         }
 258         return (1);
 259 }
 260
 261 int
 262 set_cert_key_stuff(SSL_CTX * ctx, X509 * cert, EVP_PKEY * key)
 263 {
 264         if (cert == NULL)
 265                 return 1;
 266         if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
 267                 BIO_printf(bio_err, "error setting certificate\n");
 268                 ERR_print_errors(bio_err);
 269                 return 0;
 270         }
 271         if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
 272                 BIO_printf(bio_err, "error setting private key\n");
 273                 ERR_print_errors(bio_err);
 274                 return 0;
 275         }
 276         /*
 277          * Now we know that a key and cert have been set against the SSL
 278          * context
 279          */
 280         if (!SSL_CTX_check_private_key(ctx)) {
 281                 BIO_printf(bio_err,
 282                     "Private key does not match the certificate public key\n");
 283                 return 0;
 284         }
 285         return 1;
 286 }
 287
 288 int
 289 ssl_print_tmp_key(BIO *out, SSL *s)
 290 {
 291         const char *cname;
 292         EVP_PKEY *pkey;
 293         EC_KEY *ec;
 294         int nid;
 295
 296         if (!SSL_get_server_tmp_key(s, &pkey))
 297                 return 0;
 298
 299         BIO_puts(out, "Server Temp Key: ");
 300         switch (EVP_PKEY_id(pkey)) {
 301         case EVP_PKEY_DH:
 302                 BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(pkey));
 303                 break;
 304
 305         case EVP_PKEY_EC:
 306                 ec = EVP_PKEY_get1_EC_KEY(pkey);
 307                 nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 308                 EC_KEY_free(ec);
 309
 310                 if ((cname = EC_curve_nid2nist(nid)) == NULL)
 311                         cname = OBJ_nid2sn(nid);
 312
 313                 BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(pkey));
 314                 break;
 315
 316         default:
 317                 BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(pkey)),
 318                     EVP_PKEY_bits(pkey));
 319         }
 320
 321         EVP_PKEY_free(pkey);
 322         return 1;
 323 }
 324
 325 long
 326 bio_dump_callback(BIO * bio, int cmd, const char *argp,
 327     int argi, long argl, long ret)
 328 {
 329         BIO *out;
 330
 331         out = (BIO *) BIO_get_callback_arg(bio);
 332         if (out == NULL)
 333                 return (ret);
 334
 335         if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
 336                 BIO_printf(out,
 337                     "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 338                     (void *) bio, argp, (unsigned long) argi, ret, ret);
 339                 BIO_dump(out, argp, (int) ret);
 340                 return (ret);
 341         } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
 342                 BIO_printf(out,
 343                     "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 344                     (void *) bio, argp, (unsigned long) argi, ret, ret);
 345                 BIO_dump(out, argp, (int) ret);
 346         }
 347         return (ret);
 348 }
 349
 350 void
 351 apps_ssl_info_callback(const SSL * s, int where, int ret)
 352 {
 353         const char *str;
 354         int w;
 355
 356         w = where & ~SSL_ST_MASK;
 357
 358         if (w & SSL_ST_CONNECT)
 359                 str = "SSL_connect";
 360         else if (w & SSL_ST_ACCEPT)
 361                 str = "SSL_accept";
 362         else
 363                 str = "undefined";
 364
 365         if (where & SSL_CB_LOOP) {
 366                 BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
 367         } else if (where & SSL_CB_ALERT) {
 368                 str = (where & SSL_CB_READ) ? "read" : "write";
 369                 BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n", str,
 370                     SSL_alert_type_string_long(ret),
 371                     SSL_alert_desc_string_long(ret));
 372         } else if (where & SSL_CB_EXIT) {
 373                 if (ret == 0)
 374                         BIO_printf(bio_err, "%s:failed in %s\n",
 375                             str, SSL_state_string_long(s));
 376                 else if (ret < 0) {
 377                         BIO_printf(bio_err, "%s:error in %s\n",
 378                             str, SSL_state_string_long(s));
 379                 }
 380         }
 381 }
 382
 383
 384 void
 385 msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL * ssl, void *arg)
 386 {
 387         BIO *bio = arg;
 388         const char *str_write_p, *str_version, *str_content_type = "",
 389             *str_details1 = "", *str_details2 = "";
 390
 391         str_write_p = write_p ? ">>>" : "<<<";
 392
 393         switch (version) {
 394         case SSL2_VERSION:
 395                 str_version = "SSL 2.0";
 396                 break;
 397         case SSL3_VERSION:
 398                 str_version = "SSL 3.0 ";
 399                 break;
 400         case TLS1_VERSION:
 401                 str_version = "TLS 1.0 ";
 402                 break;
 403         case TLS1_1_VERSION:
 404                 str_version = "TLS 1.1 ";
 405                 break;
 406         case TLS1_2_VERSION:
 407                 str_version = "TLS 1.2 ";
 408                 break;
 409         case DTLS1_VERSION:
 410                 str_version = "DTLS 1.0 ";
 411                 break;
 412         default:
 413                 str_version = "???";
 414         }
 415
 416         if (version == SSL2_VERSION) {
 417                 str_details1 = "???";
 418
 419                 if (len > 0) {
 420                         switch (((const unsigned char *) buf)[0]) {
 421                         case 0:
 422                                 str_details1 = ", ERROR:";
 423                                 str_details2 = " ???";
 424                                 if (len >= 3) {
 425                                         unsigned err = (((const unsigned char *) buf)[1] << 8) + ((const unsigned char *) buf)[2];
 426
 427                                         switch (err) {
 428                                         case 0x0001:
 429                                                 str_details2 = " NO-CIPHER-ERROR";
 430                                                 break;
 431                                         case 0x0002:
 432                                                 str_details2 = " NO-CERTIFICATE-ERROR";
 433                                                 break;
 434                                         case 0x0004:
 435                                                 str_details2 = " BAD-CERTIFICATE-ERROR";
 436                                                 break;
 437                                         case 0x0006:
 438                                                 str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 439                                                 break;
 440                                         }
 441                                 }
 442                                 break;
 443                         case 1:
 444                                 str_details1 = ", CLIENT-HELLO";
 445                                 break;
 446                         case 2:
 447                                 str_details1 = ", CLIENT-MASTER-KEY";
 448                                 break;
 449                         case 3:
 450                                 str_details1 = ", CLIENT-FINISHED";
 451                                 break;
 452                         case 4:
 453                                 str_details1 = ", SERVER-HELLO";
 454                                 break;
 455                         case 5:
 456                                 str_details1 = ", SERVER-VERIFY";
 457                                 break;
 458                         case 6:
 459                                 str_details1 = ", SERVER-FINISHED";
 460                                 break;
 461                         case 7:
 462                                 str_details1 = ", REQUEST-CERTIFICATE";
 463                                 break;
 464                         case 8:
 465                                 str_details1 = ", CLIENT-CERTIFICATE";
 466                                 break;
 467                         }
 468                 }
 469         }
 470         if (version == SSL3_VERSION || version == TLS1_VERSION ||
 471             version == TLS1_1_VERSION || version == TLS1_2_VERSION ||
 472             version == DTLS1_VERSION) {
 473                 switch (content_type) {
 474                 case 20:
 475                         str_content_type = "ChangeCipherSpec";
 476                         break;
 477                 case 21:
 478                         str_content_type = "Alert";
 479                         break;
 480                 case 22:
 481                         str_content_type = "Handshake";
 482                         break;
 483                 }
 484
 485                 if (content_type == 21) {       /* Alert */
 486                         str_details1 = ", ???";
 487
 488                         if (len == 2) {
 489                                 switch (((const unsigned char *) buf)[0]) {
 490                                 case 1:
 491                                         str_details1 = ", warning";
 492                                         break;
 493                                 case 2:
 494                                         str_details1 = ", fatal";
 495                                         break;
 496                                 }
 497
 498                                 str_details2 = " ???";
 499                                 switch (((const unsigned char *) buf)[1]) {
 500                                 case 0:
 501                                         str_details2 = " close_notify";
 502                                         break;
 503                                 case 10:
 504                                         str_details2 = " unexpected_message";
 505                                         break;
 506                                 case 20:
 507                                         str_details2 = " bad_record_mac";
 508                                         break;
 509                                 case 21:
 510                                         str_details2 = " decryption_failed";
 511                                         break;
 512                                 case 22:
 513                                         str_details2 = " record_overflow";
 514                                         break;
 515                                 case 30:
 516                                         str_details2 = " decompression_failure";
 517                                         break;
 518                                 case 40:
 519                                         str_details2 = " handshake_failure";
 520                                         break;
 521                                 case 42:
 522                                         str_details2 = " bad_certificate";
 523                                         break;
 524                                 case 43:
 525                                         str_details2 = " unsupported_certificate";
 526                                         break;
 527                                 case 44:
 528                                         str_details2 = " certificate_revoked";
 529                                         break;
 530                                 case 45:
 531                                         str_details2 = " certificate_expired";
 532                                         break;
 533                                 case 46:
 534                                         str_details2 = " certificate_unknown";
 535                                         break;
 536                                 case 47:
 537                                         str_details2 = " illegal_parameter";
 538                                         break;
 539                                 case 48:
 540                                         str_details2 = " unknown_ca";
 541                                         break;
 542                                 case 49:
 543                                         str_details2 = " access_denied";
 544                                         break;
 545                                 case 50:
 546                                         str_details2 = " decode_error";
 547                                         break;
 548                                 case 51:
 549                                         str_details2 = " decrypt_error";
 550                                         break;
 551                                 case 60:
 552                                         str_details2 = " export_restriction";
 553                                         break;
 554                                 case 70:
 555                                         str_details2 = " protocol_version";
 556                                         break;
 557                                 case 71:
 558                                         str_details2 = " insufficient_security";
 559                                         break;
 560                                 case 80:
 561                                         str_details2 = " internal_error";
 562                                         break;
 563                                 case 90:
 564                                         str_details2 = " user_canceled";
 565                                         break;
 566                                 case 100:
 567                                         str_details2 = " no_renegotiation";
 568                                         break;
 569                                 case 110:
 570                                         str_details2 = " unsupported_extension";
 571                                         break;
 572                                 case 111:
 573                                         str_details2 = " certificate_unobtainable";
 574                                         break;
 575                                 case 112:
 576                                         str_details2 = " unrecognized_name";
 577                                         break;
 578                                 case 113:
 579                                         str_details2 = " bad_certificate_status_response";
 580                                         break;
 581                                 case 114:
 582                                         str_details2 = " bad_certificate_hash_value";
 583                                         break;
 584                                 case 115:
 585                                         str_details2 = " unknown_psk_identity";
 586                                         break;
 587                                 }
 588                         }
 589                 }
 590                 if (content_type == 22) {       /* Handshake */
 591                         str_details1 = "???";
 592
 593                         if (len > 0) {
 594                                 switch (((const unsigned char *) buf)[0]) {
 595                                 case 0:
 596                                         str_details1 = ", HelloRequest";
 597                                         break;
 598                                 case 1:
 599                                         str_details1 = ", ClientHello";
 600                                         break;
 601                                 case 2:
 602                                         str_details1 = ", ServerHello";
 603                                         break;
 604                                 case 3:
 605                                         str_details1 = ", HelloVerifyRequest";
 606                                         break;
 607                                 case 11:
 608                                         str_details1 = ", Certificate";
 609                                         break;
 610                                 case 12:
 611                                         str_details1 = ", ServerKeyExchange";
 612                                         break;
 613                                 case 13:
 614                                         str_details1 = ", CertificateRequest";
 615                                         break;
 616                                 case 14:
 617                                         str_details1 = ", ServerHelloDone";
 618                                         break;
 619                                 case 15:
 620                                         str_details1 = ", CertificateVerify";
 621                                         break;
 622                                 case 16:
 623                                         str_details1 = ", ClientKeyExchange";
 624                                         break;
 625                                 case 20:
 626                                         str_details1 = ", Finished";
 627                                         break;
 628                                 }
 629                         }
 630                 }
 631         }
 632         BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p,
 633             str_version, str_content_type, (unsigned long) len,
 634             str_details1, str_details2);
 635
 636         if (len > 0) {
 637                 size_t num, i;
 638
 639                 BIO_printf(bio, "   ");
 640                 num = len;
 641
 642                 for (i = 0; i < num; i++) {
 643                         if (i % 16 == 0 && i > 0)
 644                                 BIO_printf(bio, "\n   ");
 645                         BIO_printf(bio, " %02x",
 646                             ((const unsigned char *) buf)[i]);
 647                 }
 648                 if (i < len)
 649                         BIO_printf(bio, " ...");
 650                 BIO_printf(bio, "\n");
 651         }
 652         (void) BIO_flush(bio);
 653 }
 654
 655 void
 656 tlsext_cb(SSL * s, int client_server, int type, unsigned char *data, int len,
 657     void *arg)
 658 {
 659         BIO *bio = arg;
 660         char *extname;
 661
 662         switch (type) {
 663         case TLSEXT_TYPE_server_name:
 664                 extname = "server name";
 665                 break;
 666
 667         case TLSEXT_TYPE_max_fragment_length:
 668                 extname = "max fragment length";
 669                 break;
 670
 671         case TLSEXT_TYPE_client_certificate_url:
 672                 extname = "client certificate URL";
 673                 break;
 674
 675         case TLSEXT_TYPE_trusted_ca_keys:
 676                 extname = "trusted CA keys";
 677                 break;
 678
 679         case TLSEXT_TYPE_truncated_hmac:
 680                 extname = "truncated HMAC";
 681                 break;
 682
 683         case TLSEXT_TYPE_status_request:
 684                 extname = "status request";
 685                 break;
 686
 687         case TLSEXT_TYPE_user_mapping:
 688                 extname = "user mapping";
 689                 break;
 690
 691         case TLSEXT_TYPE_client_authz:
 692                 extname = "client authz";
 693                 break;
 694
 695         case TLSEXT_TYPE_server_authz:
 696                 extname = "server authz";
 697                 break;
 698
 699         case TLSEXT_TYPE_cert_type:
 700                 extname = "cert type";
 701                 break;
 702
 703         case TLSEXT_TYPE_elliptic_curves:
 704                 extname = "elliptic curves";
 705                 break;
 706
 707         case TLSEXT_TYPE_ec_point_formats:
 708                 extname = "EC point formats";
 709                 break;
 710
 711         case TLSEXT_TYPE_srp:
 712                 extname = "SRP";
 713                 break;
 714
 715         case TLSEXT_TYPE_signature_algorithms:
 716                 extname = "signature algorithms";
 717                 break;
 718
 719         case TLSEXT_TYPE_use_srtp:
 720                 extname = "use SRTP";
 721                 break;
 722
 723         case TLSEXT_TYPE_heartbeat:
 724                 extname = "heartbeat";
 725                 break;
 726
 727         case TLSEXT_TYPE_session_ticket:
 728                 extname = "session ticket";
 729                 break;
 730
 731         case TLSEXT_TYPE_renegotiate:
 732                 extname = "renegotiation info";
 733                 break;
 734
 735         default:
 736                 extname = "unknown";
 737                 break;
 738
 739         }
 740
 741         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 742             client_server ? "server" : "client", extname, type, len);
 743         BIO_dump(bio, (char *) data, len);
 744         (void) BIO_flush(bio);
 745 }
 746
 747 int
 748 generate_cookie_callback(SSL * ssl, unsigned char *cookie,
 749     unsigned int *cookie_len)
 750 {
 751         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 752         unsigned int length, resultlength;
 753         union {
 754                 struct sockaddr sa;
 755                 struct sockaddr_in s4;
 756                 struct sockaddr_in6 s6;
 757         } peer;
 758
 759         /* Initialize a random secret */
 760         if (!cookie_initialized) {
 761                 arc4random_buf(cookie_secret, COOKIE_SECRET_LENGTH);
 762                 cookie_initialized = 1;
 763         }
 764         /* Read peer information */
 765         (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 766
 767         /* Create buffer with peer's address and port */
 768         length = 0;
 769         switch (peer.sa.sa_family) {
 770         case AF_INET:
 771                 length += sizeof(struct in_addr);
 772                 length += sizeof(peer.s4.sin_port);
 773                 break;
 774         case AF_INET6:
 775                 length += sizeof(struct in6_addr);
 776                 length += sizeof(peer.s6.sin6_port);
 777                 break;
 778         default:
 779                 OPENSSL_assert(0);
 780                 break;
 781         }
 782         buffer = malloc(length);
 783
 784         if (buffer == NULL) {
 785                 BIO_printf(bio_err, "out of memory\n");
 786                 return 0;
 787         }
 788         switch (peer.sa.sa_family) {
 789         case AF_INET:
 790                 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
 791                 memcpy(buffer + sizeof(peer.s4.sin_port),
 792                     &peer.s4.sin_addr, sizeof(struct in_addr));
 793                 break;
 794         case AF_INET6:
 795                 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
 796                 memcpy(buffer + sizeof(peer.s6.sin6_port),
 797                     &peer.s6.sin6_addr, sizeof(struct in6_addr));
 798                 break;
 799         default:
 800                 OPENSSL_assert(0);
 801                 break;
 802         }
 803
 804         /* Calculate HMAC of buffer using the secret */
 805         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 806             buffer, length, result, &resultlength);
 807         free(buffer);
 808
 809         memcpy(cookie, result, resultlength);
 810         *cookie_len = resultlength;
 811
 812         return 1;
 813 }
 814
 815 int
 816 verify_cookie_callback(SSL * ssl, unsigned char *cookie, unsigned int cookie_len)
 817 {
 818         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 819         unsigned int length, resultlength;
 820         union {
 821                 struct sockaddr sa;
 822                 struct sockaddr_in s4;
 823                 struct sockaddr_in6 s6;
 824         } peer;
 825
 826         /* If secret isn't initialized yet, the cookie can't be valid */
 827         if (!cookie_initialized)
 828                 return 0;
 829
 830         /* Read peer information */
 831         (void) BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 832
 833         /* Create buffer with peer's address and port */
 834         length = 0;
 835         switch (peer.sa.sa_family) {
 836         case AF_INET:
 837                 length += sizeof(struct in_addr);
 838                 length += sizeof(peer.s4.sin_port);
 839                 break;
 840         case AF_INET6:
 841                 length += sizeof(struct in6_addr);
 842                 length += sizeof(peer.s6.sin6_port);
 843                 break;
 844         default:
 845                 OPENSSL_assert(0);
 846                 break;
 847         }
 848         buffer = malloc(length);
 849
 850         if (buffer == NULL) {
 851                 BIO_printf(bio_err, "out of memory\n");
 852                 return 0;
 853         }
 854         switch (peer.sa.sa_family) {
 855         case AF_INET:
 856                 memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
 857                 memcpy(buffer + sizeof(peer.s4.sin_port),
 858                     &peer.s4.sin_addr, sizeof(struct in_addr));
 859                 break;
 860         case AF_INET6:
 861                 memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
 862                 memcpy(buffer + sizeof(peer.s6.sin6_port),
 863                     &peer.s6.sin6_addr, sizeof(struct in6_addr));
 864                 break;
 865         default:
 866                 OPENSSL_assert(0);
 867                 break;
 868         }
 869
 870         /* Calculate HMAC of buffer using the secret */
 871         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 872             buffer, length, result, &resultlength);
 873         free(buffer);
 874
 875         if (cookie_len == resultlength &&
 876             memcmp(result, cookie, resultlength) == 0)
 877                 return 1;
 878
 879         return 0;
 880 }