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/x509.h>
 121 #include <openssl/ssl.h>
 122 #include "s_apps.h"
 123
 124 int verify_depth=0;
 125 int verify_error=X509_V_OK;
 126
 127 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 128         {
 129         char buf[256];
 130         X509 *err_cert;
 131         int err,depth;
 132
 133         err_cert=X509_STORE_CTX_get_current_cert(ctx);
 134         err=    X509_STORE_CTX_get_error(ctx);
 135         depth=  X509_STORE_CTX_get_error_depth(ctx);
 136
 137         X509_NAME_oneline(X509_get_subject_name(err_cert),buf,sizeof buf);
 138         BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
 139         if (!ok)
 140                 {
 141                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 142                         X509_verify_cert_error_string(err));
 143                 if (verify_depth >= depth)
 144                         {
 145                         ok=1;
 146                         verify_error=X509_V_OK;
 147                         }
 148                 else
 149                         {
 150                         ok=0;
 151                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
 152                         }
 153                 }
 154         switch (ctx->error)
 155                 {
 156         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 157                 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,sizeof buf);
 158                 BIO_printf(bio_err,"issuer= %s\n",buf);
 159                 break;
 160         case X509_V_ERR_CERT_NOT_YET_VALID:
 161         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 162                 BIO_printf(bio_err,"notBefore=");
 163                 ASN1_TIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
 164                 BIO_printf(bio_err,"\n");
 165                 break;
 166         case X509_V_ERR_CERT_HAS_EXPIRED:
 167         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 168                 BIO_printf(bio_err,"notAfter=");
 169                 ASN1_TIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
 170                 BIO_printf(bio_err,"\n");
 171                 break;
 172                 }
 173         BIO_printf(bio_err,"verify return:%d\n",ok);
 174         return(ok);
 175         }
 176
 177 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 178         {
 179         if (cert_file != NULL)
 180                 {
 181                 /*
 182                 SSL *ssl;
 183                 X509 *x509;
 184                 */
 185
 186                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
 187                         SSL_FILETYPE_PEM) <= 0)
 188                         {
 189                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
 190                         ERR_print_errors(bio_err);
 191                         return(0);
 192                         }
 193                 if (key_file == NULL) key_file=cert_file;
 194                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
 195                         SSL_FILETYPE_PEM) <= 0)
 196                         {
 197                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
 198                         ERR_print_errors(bio_err);
 199                         return(0);
 200                         }
 201
 202                 /*
 203                 In theory this is no longer needed
 204                 ssl=SSL_new(ctx);
 205                 x509=SSL_get_certificate(ssl);
 206
 207                 if (x509 != NULL) {
 208                         EVP_PKEY *pktmp;
 209                         pktmp = X509_get_pubkey(x509);
 210                         EVP_PKEY_copy_parameters(pktmp,
 211                                                 SSL_get_privatekey(ssl));
 212                         EVP_PKEY_free(pktmp);
 213                 }
 214                 SSL_free(ssl);
 215                 */
 216
 217                 /* If we are using DSA, we can copy the parameters from
 218                  * the private key */
 219
 220
 221                 /* Now we know that a key and cert have been set against
 222                  * the SSL context */
 223                 if (!SSL_CTX_check_private_key(ctx))
 224                         {
 225                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 226                         return(0);
 227                         }
 228                 }
 229         return(1);
 230         }
 231
 232 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
 233         {
 234         if (cert ==  NULL)
 235                 return 1;
 236         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
 237                 {
 238                 BIO_printf(bio_err,"error setting certificate\n");
 239                 ERR_print_errors(bio_err);
 240                 return 0;
 241                 }
 242         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
 243                 {
 244                 BIO_printf(bio_err,"error setting private key\n");
 245                 ERR_print_errors(bio_err);
 246                 return 0;
 247                 }
 248
 249
 250                 /* Now we know that a key and cert have been set against
 251                  * the SSL context */
 252         if (!SSL_CTX_check_private_key(ctx))
 253                 {
 254                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 255                 return 0;
 256                 }
 257         return 1;
 258         }
 259
 260 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 261         int argi, long argl, long ret)
 262         {
 263         BIO *out;
 264
 265         out=(BIO *)BIO_get_callback_arg(bio);
 266         if (out == NULL) return(ret);
 267
 268         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 269                 {
 270                 BIO_printf(out,"read from %p [%p] (%d bytes => %ld (0x%lX))\n",
 271                         (void *)bio,argp,argi,ret,ret);
 272                 BIO_dump(out,argp,(int)ret);
 273                 return(ret);
 274                 }
 275         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 276                 {
 277                 BIO_printf(out,"write to %p [%p] (%d bytes => %ld (0x%lX))\n",
 278                         (void *)bio,argp,argi,ret,ret);
 279                 BIO_dump(out,argp,(int)ret);
 280                 }
 281         return(ret);
 282         }
 283
 284 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 285         {
 286         const char *str;
 287         int w;
 288
 289         w=where& ~SSL_ST_MASK;
 290
 291         if (w & SSL_ST_CONNECT) str="SSL_connect";
 292         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 293         else str="undefined";
 294
 295         if (where & SSL_CB_LOOP)
 296                 {
 297                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 298                 }
 299         else if (where & SSL_CB_ALERT)
 300                 {
 301                 str=(where & SSL_CB_READ)?"read":"write";
 302                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 303                         str,
 304                         SSL_alert_type_string_long(ret),
 305                         SSL_alert_desc_string_long(ret));
 306                 }
 307         else if (where & SSL_CB_EXIT)
 308                 {
 309                 if (ret == 0)
 310                         BIO_printf(bio_err,"%s:failed in %s\n",
 311                                 str,SSL_state_string_long(s));
 312                 else if (ret < 0)
 313                         {
 314                         BIO_printf(bio_err,"%s:error in %s\n",
 315                                 str,SSL_state_string_long(s));
 316                         }
 317                 }
 318         }
 319
 320
 321 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 322         {
 323         BIO *bio = arg;
 324         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 325
 326         str_write_p = write_p ? ">>>" : "<<<";
 327
 328         switch (version)
 329                 {
 330         case SSL2_VERSION:
 331                 str_version = "SSL 2.0";
 332                 break;
 333         case SSL3_VERSION:
 334                 str_version = "SSL 3.0 ";
 335                 break;
 336         case TLS1_VERSION:
 337                 str_version = "TLS 1.0 ";
 338                 break;
 339         default:
 340                 str_version = "???";
 341         case DTLS1_VERSION:
 342                 str_version = "DTLS 1.0 ";
 343                 break;
 344         case DTLS1_BAD_VER:
 345                 str_version = "DTLS 1.0 (bad) ";
 346                 break;
 347                 }
 348
 349         if (version == SSL2_VERSION)
 350                 {
 351                 str_details1 = "???";
 352
 353                 if (len > 0)
 354                         {
 355                         switch (((const unsigned char*)buf)[0])
 356                                 {
 357                                 case 0:
 358                                         str_details1 = ", ERROR:";
 359                                         str_details2 = " ???";
 360                                         if (len >= 3)
 361                                                 {
 362                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 363
 364                                                 switch (err)
 365                                                         {
 366                                                 case 0x0001:
 367                                                         str_details2 = " NO-CIPHER-ERROR";
 368                                                         break;
 369                                                 case 0x0002:
 370                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 371                                                         break;
 372                                                 case 0x0004:
 373                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 374                                                         break;
 375                                                 case 0x0006:
 376                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 377                                                         break;
 378                                                         }
 379                                                 }
 380
 381                                         break;
 382                                 case 1:
 383                                         str_details1 = ", CLIENT-HELLO";
 384                                         break;
 385                                 case 2:
 386                                         str_details1 = ", CLIENT-MASTER-KEY";
 387                                         break;
 388                                 case 3:
 389                                         str_details1 = ", CLIENT-FINISHED";
 390                                         break;
 391                                 case 4:
 392                                         str_details1 = ", SERVER-HELLO";
 393                                         break;
 394                                 case 5:
 395                                         str_details1 = ", SERVER-VERIFY";
 396                                         break;
 397                                 case 6:
 398                                         str_details1 = ", SERVER-FINISHED";
 399                                         break;
 400                                 case 7:
 401                                         str_details1 = ", REQUEST-CERTIFICATE";
 402                                         break;
 403                                 case 8:
 404                                         str_details1 = ", CLIENT-CERTIFICATE";
 405                                         break;
 406                                 }
 407                         }
 408                 }
 409
 410         if (version == SSL3_VERSION ||
 411             version == TLS1_VERSION ||
 412             version == DTLS1_VERSION ||
 413             version == DTLS1_BAD_VER)
 414                 {
 415                 switch (content_type)
 416                         {
 417                 case 20:
 418                         str_content_type = "ChangeCipherSpec";
 419                         break;
 420                 case 21:
 421                         str_content_type = "Alert";
 422                         break;
 423                 case 22:
 424                         str_content_type = "Handshake";
 425                         break;
 426                         }
 427
 428                 if (content_type == 21) /* Alert */
 429                         {
 430                         str_details1 = ", ???";
 431
 432                         if (len == 2)
 433                                 {
 434                                 switch (((const unsigned char*)buf)[0])
 435                                         {
 436                                 case 1:
 437                                         str_details1 = ", warning";
 438                                         break;
 439                                 case 2:
 440                                         str_details1 = ", fatal";
 441                                         break;
 442                                         }
 443
 444                                 str_details2 = " ???";
 445                                 switch (((const unsigned char*)buf)[1])
 446                                         {
 447                                 case 0:
 448                                         str_details2 = " close_notify";
 449                                         break;
 450                                 case 10:
 451                                         str_details2 = " unexpected_message";
 452                                         break;
 453                                 case 20:
 454                                         str_details2 = " bad_record_mac";
 455                                         break;
 456                                 case 21:
 457                                         str_details2 = " decryption_failed";
 458                                         break;
 459                                 case 22:
 460                                         str_details2 = " record_overflow";
 461                                         break;
 462                                 case 30:
 463                                         str_details2 = " decompression_failure";
 464                                         break;
 465                                 case 40:
 466                                         str_details2 = " handshake_failure";
 467                                         break;
 468                                 case 42:
 469                                         str_details2 = " bad_certificate";
 470                                         break;
 471                                 case 43:
 472                                         str_details2 = " unsupported_certificate";
 473                                         break;
 474                                 case 44:
 475                                         str_details2 = " certificate_revoked";
 476                                         break;
 477                                 case 45:
 478                                         str_details2 = " certificate_expired";
 479                                         break;
 480                                 case 46:
 481                                         str_details2 = " certificate_unknown";
 482                                         break;
 483                                 case 47:
 484                                         str_details2 = " illegal_parameter";
 485                                         break;
 486                                 case 48:
 487                                         str_details2 = " unknown_ca";
 488                                         break;
 489                                 case 49:
 490                                         str_details2 = " access_denied";
 491                                         break;
 492                                 case 50:
 493                                         str_details2 = " decode_error";
 494                                         break;
 495                                 case 51:
 496                                         str_details2 = " decrypt_error";
 497                                         break;
 498                                 case 60:
 499                                         str_details2 = " export_restriction";
 500                                         break;
 501                                 case 70:
 502                                         str_details2 = " protocol_version";
 503                                         break;
 504                                 case 71:
 505                                         str_details2 = " insufficient_security";
 506                                         break;
 507                                 case 80:
 508                                         str_details2 = " internal_error";
 509                                         break;
 510                                 case 90:
 511                                         str_details2 = " user_canceled";
 512                                         break;
 513                                 case 100:
 514                                         str_details2 = " no_renegotiation";
 515                                         break;
 516                                         }
 517                                 }
 518                         }
 519
 520                 if (content_type == 22) /* Handshake */
 521                         {
 522                         str_details1 = "???";
 523
 524                         if (len > 0)
 525                                 {
 526                                 switch (((const unsigned char*)buf)[0])
 527                                         {
 528                                 case 0:
 529                                         str_details1 = ", HelloRequest";
 530                                         break;
 531                                 case 1:
 532                                         str_details1 = ", ClientHello";
 533                                         break;
 534                                 case 2:
 535                                         str_details1 = ", ServerHello";
 536                                         break;
 537                                 case 11:
 538                                         str_details1 = ", Certificate";
 539                                         break;
 540                                 case 12:
 541                                         str_details1 = ", ServerKeyExchange";
 542                                         break;
 543                                 case 13:
 544                                         str_details1 = ", CertificateRequest";
 545                                         break;
 546                                 case 14:
 547                                         str_details1 = ", ServerHelloDone";
 548                                         break;
 549                                 case 15:
 550                                         str_details1 = ", CertificateVerify";
 551                                         break;
 552                                 case 3:
 553                                         str_details1 = ", HelloVerifyRequest";
 554                                         break;
 555                                 case 16:
 556                                         str_details1 = ", ClientKeyExchange";
 557                                         break;
 558                                 case 20:
 559                                         str_details1 = ", Finished";
 560                                         break;
 561                                         }
 562                                 }
 563                         }
 564                 }
 565
 566         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);
 567
 568         if (len > 0)
 569                 {
 570                 size_t num, i;
 571
 572                 BIO_printf(bio, "   ");
 573                 num = len;
 574 #if 0
 575                 if (num > 16)
 576                         num = 16;
 577 #endif
 578                 for (i = 0; i < num; i++)
 579                         {
 580                         if (i % 16 == 0 && i > 0)
 581                                 BIO_printf(bio, "\n   ");
 582                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 583                         }
 584                 if (i < len)
 585                         BIO_printf(bio, " ...");
 586                 BIO_printf(bio, "\n");
 587                 }
 588         (void)BIO_flush(bio);
 589         }
 590
 591 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 592                                         unsigned char *data, int len,
 593                                         void *arg)
 594         {
 595         BIO *bio = arg;
 596         char *extname;
 597
 598         switch(type)
 599                 {
 600                 case TLSEXT_TYPE_server_name:
 601                 extname = "server name";
 602                 break;
 603
 604                 case TLSEXT_TYPE_max_fragment_length:
 605                 extname = "max fragment length";
 606                 break;
 607
 608                 case TLSEXT_TYPE_client_certificate_url:
 609                 extname = "client certificate URL";
 610                 break;
 611
 612                 case TLSEXT_TYPE_trusted_ca_keys:
 613                 extname = "trusted CA keys";
 614                 break;
 615
 616                 case TLSEXT_TYPE_truncated_hmac:
 617                 extname = "truncated HMAC";
 618                 break;
 619
 620                 case TLSEXT_TYPE_status_request:
 621                 extname = "status request";
 622                 break;
 623
 624                 case TLSEXT_TYPE_elliptic_curves:
 625                 extname = "elliptic curves";
 626                 break;
 627
 628                 case TLSEXT_TYPE_ec_point_formats:
 629                 extname = "EC point formats";
 630                 break;
 631
 632                 case TLSEXT_TYPE_session_ticket:
 633                 extname = "server ticket";
 634                 break;
 635
 636
 637                 default:
 638                 extname = "unknown";
 639                 break;
 640
 641                 }
 642
 643         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 644                         client_server ? "server": "client",
 645                         extname, type, len);
 646         BIO_dump(bio, (char *)data, len);
 647         (void)BIO_flush(bio);
 648         }