apps/s_cb.c

   1 /* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111
 112 #include <stdio.h>
 113 #include <stdlib.h>
 114 #define USE_SOCKETS
 115 #define NON_MAIN
 116 #include "apps.h"
 117 #undef NON_MAIN
 118 #undef USE_SOCKETS
 119 #include <openssl/err.h>
 120 #include <openssl/rand.h>
 121 #include <openssl/x509.h>
 122 #include <openssl/ssl.h>
 123 #include "s_apps.h"
 124
 125 #define COOKIE_SECRET_LENGTH    16
 126
 127 int verify_depth=0;
 128 int verify_error=X509_V_OK;
 129 int verify_return_error=0;
 130 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 131 int cookie_initialized=0;
 132
 133 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 134         {
 135         X509 *err_cert;
 136         int err,depth;
 137
 138         err_cert=X509_STORE_CTX_get_current_cert(ctx);
 139         err=    X509_STORE_CTX_get_error(ctx);
 140         depth=  X509_STORE_CTX_get_error_depth(ctx);
 141
 142         BIO_printf(bio_err,"depth=%d ",depth);
 143         if (err_cert)
 144                 {
 145                 X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
 146                                         0, XN_FLAG_ONELINE);
 147                 BIO_puts(bio_err, "\n");
 148                 }
 149         else
 150                 BIO_puts(bio_err, "<no cert>\n");
 151         if (!ok)
 152                 {
 153                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 154                         X509_verify_cert_error_string(err));
 155                 if (verify_depth >= depth)
 156                         {
 157                         if (!verify_return_error)
 158                                 ok=1;
 159                         verify_error=X509_V_OK;
 160                         }
 161                 else
 162                         {
 163                         ok=0;
 164                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
 165                         }
 166                 }
 167         switch (err)
 168                 {
 169         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 170                 BIO_puts(bio_err,"issuer= ");
 171                 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
 172                                         0, XN_FLAG_ONELINE);
 173                 BIO_puts(bio_err, "\n");
 174                 break;
 175         case X509_V_ERR_CERT_NOT_YET_VALID:
 176         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 177                 BIO_printf(bio_err,"notBefore=");
 178                 ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
 179                 BIO_printf(bio_err,"\n");
 180                 break;
 181         case X509_V_ERR_CERT_HAS_EXPIRED:
 182         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 183                 BIO_printf(bio_err,"notAfter=");
 184                 ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
 185                 BIO_printf(bio_err,"\n");
 186                 break;
 187         case X509_V_ERR_NO_EXPLICIT_POLICY:
 188                 policies_print(bio_err, ctx);
 189                 break;
 190                 }
 191         if (err == X509_V_OK && ok == 2)
 192                 policies_print(bio_err, ctx);
 193
 194         BIO_printf(bio_err,"verify return:%d\n",ok);
 195         return(ok);
 196         }
 197
 198 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 199         {
 200         if (cert_file != NULL)
 201                 {
 202                 /*
 203                 SSL *ssl;
 204                 X509 *x509;
 205                 */
 206
 207                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
 208                         SSL_FILETYPE_PEM) <= 0)
 209                         {
 210                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
 211                         ERR_print_errors(bio_err);
 212                         return(0);
 213                         }
 214                 if (key_file == NULL) key_file=cert_file;
 215                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
 216                         SSL_FILETYPE_PEM) <= 0)
 217                         {
 218                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
 219                         ERR_print_errors(bio_err);
 220                         return(0);
 221                         }
 222
 223                 /*
 224                 In theory this is no longer needed
 225                 ssl=SSL_new(ctx);
 226                 x509=SSL_get_certificate(ssl);
 227
 228                 if (x509 != NULL) {
 229                         EVP_PKEY *pktmp;
 230                         pktmp = X509_get_pubkey(x509);
 231                         EVP_PKEY_copy_parameters(pktmp,
 232                                                 SSL_get_privatekey(ssl));
 233                         EVP_PKEY_free(pktmp);
 234                 }
 235                 SSL_free(ssl);
 236                 */
 237
 238                 /* If we are using DSA, we can copy the parameters from
 239                  * the private key */
 240
 241
 242                 /* Now we know that a key and cert have been set against
 243                  * the SSL context */
 244                 if (!SSL_CTX_check_private_key(ctx))
 245                         {
 246                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 247                         return(0);
 248                         }
 249                 }
 250         return(1);
 251         }
 252
 253 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
 254                        STACK_OF(X509) *chain)
 255         {
 256         if (cert == NULL)
 257                 return 1;
 258         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
 259                 {
 260                 BIO_printf(bio_err,"error setting certificate\n");
 261                 ERR_print_errors(bio_err);
 262                 return 0;
 263                 }
 264
 265         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
 266                 {
 267                 BIO_printf(bio_err,"error setting private key\n");
 268                 ERR_print_errors(bio_err);
 269                 return 0;
 270                 }
 271
 272         /* Now we know that a key and cert have been set against
 273          * the SSL context */
 274         if (!SSL_CTX_check_private_key(ctx))
 275                 {
 276                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 277                 return 0;
 278                 }
 279         if (chain && !SSL_CTX_set1_chain(ctx, chain))
 280                 {
 281                 BIO_printf(bio_err,"error setting certificate chain\n");
 282                 ERR_print_errors(bio_err);
 283                 return 0;
 284                 }
 285         return 1;
 286         }
 287
 288 static int do_print_sigalgs(BIO *out, SSL *s, int client, int shared)
 289         {
 290         int i, nsig;
 291         if (shared)
 292                 nsig = SSL_get_shared_sigalgs(s, -1, NULL, NULL, NULL,
 293                                                         NULL, NULL);
 294         else
 295                 nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 296         if (nsig == 0)
 297                 return 1;
 298
 299         if (shared)
 300                 BIO_puts(out, "Shared ");
 301
 302         if (client)
 303                 BIO_puts(out, "Requested ");
 304         BIO_puts(out, "Signature Algorithms: ");
 305         for (i = 0; i < nsig; i++)
 306                 {
 307                 int hash_nid, sign_nid;
 308                 unsigned char rhash, rsign;
 309                 const char *sstr = NULL;
 310                 if (shared)
 311                         SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 312                                                         &rsign, &rhash);
 313                 else
 314                         SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 315                                                         &rsign, &rhash);
 316                 if (i)
 317                         BIO_puts(out, ":");
 318                 if (sign_nid == EVP_PKEY_RSA)
 319                         sstr = "RSA";
 320                 else if(sign_nid == EVP_PKEY_DSA)
 321                         sstr = "DSA";
 322                 else if(sign_nid == EVP_PKEY_EC)
 323                         sstr = "ECDSA";
 324                 if (sstr)
 325                         BIO_printf(out,"%s+", sstr);
 326                 else
 327                         BIO_printf(out,"0x%02X+", (int)rsign);
 328                 if (hash_nid != NID_undef)
 329                         BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
 330                 else
 331                         BIO_printf(out,"0x%02X", (int)rhash);
 332                 }
 333         BIO_puts(out, "\n");
 334         return 1;
 335         }
 336
 337 int ssl_print_sigalgs(BIO *out, SSL *s, int client)
 338         {
 339         do_print_sigalgs(out, s, client, 0);
 340         do_print_sigalgs(out, s, client, 1);
 341         return 1;
 342         }
 343
 344 int ssl_print_curves(BIO *out, SSL *s)
 345         {
 346         int i, ncurves, *curves, nid;
 347         const char *cname;
 348         ncurves = SSL_get1_curves(s, NULL);
 349         if (ncurves <= 0)
 350                 return 1;
 351         curves = OPENSSL_malloc(ncurves * sizeof(int));
 352         SSL_get1_curves(s, curves);
 353
 354         BIO_puts(out, "Supported Elliptic Curves: ");
 355         for (i = 0; i < ncurves; i++)
 356                 {
 357                 if (i)
 358                         BIO_puts(out, ":");
 359                 nid = curves[i];
 360                 /* If unrecognised print out hex version */
 361                 if (nid & TLSEXT_nid_unknown)
 362                         BIO_printf(out, "0x%04X", nid & 0xFFFF);
 363                 else
 364                         {
 365                         /* Use NIST name for curve if it exists */
 366                         cname = EC_curve_nid2nist(nid);
 367                         if (!cname)
 368                                 cname = OBJ_nid2sn(nid);
 369                         BIO_printf(out, "%s", cname);
 370                         }
 371                 }
 372         BIO_puts(out, "\nShared Elliptic curves: ");
 373         OPENSSL_free(curves);
 374         ncurves = SSL_get_shared_curve(s, -1);
 375         for (i = 0; i < ncurves; i++)
 376                 {
 377                 if (i)
 378                         BIO_puts(out, ":");
 379                 nid = SSL_get_shared_curve(s, i);
 380                 cname = EC_curve_nid2nist(nid);
 381                 if (!cname)
 382                         cname = OBJ_nid2sn(nid);
 383                 BIO_printf(out, "%s", cname);
 384                 }
 385         if (ncurves == 0)
 386                 BIO_puts(out, "NONE");
 387         BIO_puts(out, "\n");
 388         return 1;
 389         }
 390
 391
 392 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 393                                    int argi, long argl, long ret)
 394         {
 395         BIO *out;
 396
 397         out=(BIO *)BIO_get_callback_arg(bio);
 398         if (out == NULL) return(ret);
 399
 400         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 401                 {
 402                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 403                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 404                 BIO_dump(out,argp,(int)ret);
 405                 return(ret);
 406                 }
 407         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 408                 {
 409                 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 410                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 411                 BIO_dump(out,argp,(int)ret);
 412                 }
 413         return(ret);
 414         }
 415
 416 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 417         {
 418         const char *str;
 419         int w;
 420
 421         w=where& ~SSL_ST_MASK;
 422
 423         if (w & SSL_ST_CONNECT) str="SSL_connect";
 424         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 425         else str="undefined";
 426
 427         if (where & SSL_CB_LOOP)
 428                 {
 429                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 430                 }
 431         else if (where & SSL_CB_ALERT)
 432                 {
 433                 str=(where & SSL_CB_READ)?"read":"write";
 434                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 435                         str,
 436                         SSL_alert_type_string_long(ret),
 437                         SSL_alert_desc_string_long(ret));
 438                 }
 439         else if (where & SSL_CB_EXIT)
 440                 {
 441                 if (ret == 0)
 442                         BIO_printf(bio_err,"%s:failed in %s\n",
 443                                 str,SSL_state_string_long(s));
 444                 else if (ret < 0)
 445                         {
 446                         BIO_printf(bio_err,"%s:error in %s\n",
 447                                 str,SSL_state_string_long(s));
 448                         }
 449                 }
 450         }
 451
 452
 453 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 454         {
 455         BIO *bio = arg;
 456         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 457
 458         str_write_p = write_p ? ">>>" : "<<<";
 459
 460         switch (version)
 461                 {
 462         case SSL2_VERSION:
 463                 str_version = "SSL 2.0";
 464                 break;
 465         case SSL3_VERSION:
 466                 str_version = "SSL 3.0 ";
 467                 break;
 468         case TLS1_VERSION:
 469                 str_version = "TLS 1.0 ";
 470                 break;
 471         case TLS1_1_VERSION:
 472                 str_version = "TLS 1.1 ";
 473                 break;
 474         case TLS1_2_VERSION:
 475                 str_version = "TLS 1.2 ";
 476                 break;
 477         case DTLS1_VERSION:
 478                 str_version = "DTLS 1.0 ";
 479                 break;
 480         case DTLS1_BAD_VER:
 481                 str_version = "DTLS 1.0 (bad) ";
 482                 break;
 483         default:
 484                 str_version = "???";
 485                 }
 486
 487         if (version == SSL2_VERSION)
 488                 {
 489                 str_details1 = "???";
 490
 491                 if (len > 0)
 492                         {
 493                         switch (((const unsigned char*)buf)[0])
 494                                 {
 495                                 case 0:
 496                                         str_details1 = ", ERROR:";
 497                                         str_details2 = " ???";
 498                                         if (len >= 3)
 499                                                 {
 500                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 501
 502                                                 switch (err)
 503                                                         {
 504                                                 case 0x0001:
 505                                                         str_details2 = " NO-CIPHER-ERROR";
 506                                                         break;
 507                                                 case 0x0002:
 508                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 509                                                         break;
 510                                                 case 0x0004:
 511                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 512                                                         break;
 513                                                 case 0x0006:
 514                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 515                                                         break;
 516                                                         }
 517                                                 }
 518
 519                                         break;
 520                                 case 1:
 521                                         str_details1 = ", CLIENT-HELLO";
 522                                         break;
 523                                 case 2:
 524                                         str_details1 = ", CLIENT-MASTER-KEY";
 525                                         break;
 526                                 case 3:
 527                                         str_details1 = ", CLIENT-FINISHED";
 528                                         break;
 529                                 case 4:
 530                                         str_details1 = ", SERVER-HELLO";
 531                                         break;
 532                                 case 5:
 533                                         str_details1 = ", SERVER-VERIFY";
 534                                         break;
 535                                 case 6:
 536                                         str_details1 = ", SERVER-FINISHED";
 537                                         break;
 538                                 case 7:
 539                                         str_details1 = ", REQUEST-CERTIFICATE";
 540                                         break;
 541                                 case 8:
 542                                         str_details1 = ", CLIENT-CERTIFICATE";
 543                                         break;
 544                                 }
 545                         }
 546                 }
 547
 548         if (version == SSL3_VERSION ||
 549             version == TLS1_VERSION ||
 550             version == TLS1_1_VERSION ||
 551             version == TLS1_2_VERSION ||
 552             version == DTLS1_VERSION ||
 553             version == DTLS1_BAD_VER)
 554                 {
 555                 switch (content_type)
 556                         {
 557                 case 20:
 558                         str_content_type = "ChangeCipherSpec";
 559                         break;
 560                 case 21:
 561                         str_content_type = "Alert";
 562                         break;
 563                 case 22:
 564                         str_content_type = "Handshake";
 565                         break;
 566                         }
 567
 568                 if (content_type == 21) /* Alert */
 569                         {
 570                         str_details1 = ", ???";
 571
 572                         if (len == 2)
 573                                 {
 574                                 switch (((const unsigned char*)buf)[0])
 575                                         {
 576                                 case 1:
 577                                         str_details1 = ", warning";
 578                                         break;
 579                                 case 2:
 580                                         str_details1 = ", fatal";
 581                                         break;
 582                                         }
 583
 584                                 str_details2 = " ???";
 585                                 switch (((const unsigned char*)buf)[1])
 586                                         {
 587                                 case 0:
 588                                         str_details2 = " close_notify";
 589                                         break;
 590                                 case 10:
 591                                         str_details2 = " unexpected_message";
 592                                         break;
 593                                 case 20:
 594                                         str_details2 = " bad_record_mac";
 595                                         break;
 596                                 case 21:
 597                                         str_details2 = " decryption_failed";
 598                                         break;
 599                                 case 22:
 600                                         str_details2 = " record_overflow";
 601                                         break;
 602                                 case 30:
 603                                         str_details2 = " decompression_failure";
 604                                         break;
 605                                 case 40:
 606                                         str_details2 = " handshake_failure";
 607                                         break;
 608                                 case 42:
 609                                         str_details2 = " bad_certificate";
 610                                         break;
 611                                 case 43:
 612                                         str_details2 = " unsupported_certificate";
 613                                         break;
 614                                 case 44:
 615                                         str_details2 = " certificate_revoked";
 616                                         break;
 617                                 case 45:
 618                                         str_details2 = " certificate_expired";
 619                                         break;
 620                                 case 46:
 621                                         str_details2 = " certificate_unknown";
 622                                         break;
 623                                 case 47:
 624                                         str_details2 = " illegal_parameter";
 625                                         break;
 626                                 case 48:
 627                                         str_details2 = " unknown_ca";
 628                                         break;
 629                                 case 49:
 630                                         str_details2 = " access_denied";
 631                                         break;
 632                                 case 50:
 633                                         str_details2 = " decode_error";
 634                                         break;
 635                                 case 51:
 636                                         str_details2 = " decrypt_error";
 637                                         break;
 638                                 case 60:
 639                                         str_details2 = " export_restriction";
 640                                         break;
 641                                 case 70:
 642                                         str_details2 = " protocol_version";
 643                                         break;
 644                                 case 71:
 645                                         str_details2 = " insufficient_security";
 646                                         break;
 647                                 case 80:
 648                                         str_details2 = " internal_error";
 649                                         break;
 650                                 case 90:
 651                                         str_details2 = " user_canceled";
 652                                         break;
 653                                 case 100:
 654                                         str_details2 = " no_renegotiation";
 655                                         break;
 656                                 case 110:
 657                                         str_details2 = " unsupported_extension";
 658                                         break;
 659                                 case 111:
 660                                         str_details2 = " certificate_unobtainable";
 661                                         break;
 662                                 case 112:
 663                                         str_details2 = " unrecognized_name";
 664                                         break;
 665                                 case 113:
 666                                         str_details2 = " bad_certificate_status_response";
 667                                         break;
 668                                 case 114:
 669                                         str_details2 = " bad_certificate_hash_value";
 670                                         break;
 671                                 case 115:
 672                                         str_details2 = " unknown_psk_identity";
 673                                         break;
 674                                         }
 675                                 }
 676                         }
 677
 678                 if (content_type == 22) /* Handshake */
 679                         {
 680                         str_details1 = "???";
 681
 682                         if (len > 0)
 683                                 {
 684                                 switch (((const unsigned char*)buf)[0])
 685                                         {
 686                                 case 0:
 687                                         str_details1 = ", HelloRequest";
 688                                         break;
 689                                 case 1:
 690                                         str_details1 = ", ClientHello";
 691                                         break;
 692                                 case 2:
 693                                         str_details1 = ", ServerHello";
 694                                         break;
 695                                 case 3:
 696                                         str_details1 = ", HelloVerifyRequest";
 697                                         break;
 698                                 case 11:
 699                                         str_details1 = ", Certificate";
 700                                         break;
 701                                 case 12:
 702                                         str_details1 = ", ServerKeyExchange";
 703                                         break;
 704                                 case 13:
 705                                         str_details1 = ", CertificateRequest";
 706                                         break;
 707                                 case 14:
 708                                         str_details1 = ", ServerHelloDone";
 709                                         break;
 710                                 case 15:
 711                                         str_details1 = ", CertificateVerify";
 712                                         break;
 713                                 case 16:
 714                                         str_details1 = ", ClientKeyExchange";
 715                                         break;
 716                                 case 20:
 717                                         str_details1 = ", Finished";
 718                                         break;
 719                                         }
 720                                 }
 721                         }
 722
 723 #ifndef OPENSSL_NO_HEARTBEATS
 724                 if (content_type == 24) /* Heartbeat */
 725                         {
 726                         str_details1 = ", Heartbeat";
 727
 728                         if (len > 0)
 729                                 {
 730                                 switch (((const unsigned char*)buf)[0])
 731                                         {
 732                                 case 1:
 733                                         str_details1 = ", HeartbeatRequest";
 734                                         break;
 735                                 case 2:
 736                                         str_details1 = ", HeartbeatResponse";
 737                                         break;
 738                                         }
 739                                 }
 740                         }
 741 #endif
 742                 }
 743
 744         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);
 745
 746         if (len > 0)
 747                 {
 748                 size_t num, i;
 749
 750                 BIO_printf(bio, "   ");
 751                 num = len;
 752 #if 0
 753                 if (num > 16)
 754                         num = 16;
 755 #endif
 756                 for (i = 0; i < num; i++)
 757                         {
 758                         if (i % 16 == 0 && i > 0)
 759                                 BIO_printf(bio, "\n   ");
 760                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 761                         }
 762                 if (i < len)
 763                         BIO_printf(bio, " ...");
 764                 BIO_printf(bio, "\n");
 765                 }
 766         (void)BIO_flush(bio);
 767         }
 768
 769 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 770                                         unsigned char *data, int len,
 771                                         void *arg)
 772         {
 773         BIO *bio = arg;
 774         char *extname;
 775
 776         switch(type)
 777                 {
 778                 case TLSEXT_TYPE_server_name:
 779                 extname = "server name";
 780                 break;
 781
 782                 case TLSEXT_TYPE_max_fragment_length:
 783                 extname = "max fragment length";
 784                 break;
 785
 786                 case TLSEXT_TYPE_client_certificate_url:
 787                 extname = "client certificate URL";
 788                 break;
 789
 790                 case TLSEXT_TYPE_trusted_ca_keys:
 791                 extname = "trusted CA keys";
 792                 break;
 793
 794                 case TLSEXT_TYPE_truncated_hmac:
 795                 extname = "truncated HMAC";
 796                 break;
 797
 798                 case TLSEXT_TYPE_status_request:
 799                 extname = "status request";
 800                 break;
 801
 802                 case TLSEXT_TYPE_user_mapping:
 803                 extname = "user mapping";
 804                 break;
 805
 806                 case TLSEXT_TYPE_client_authz:
 807                 extname = "client authz";
 808                 break;
 809
 810                 case TLSEXT_TYPE_server_authz:
 811                 extname = "server authz";
 812                 break;
 813
 814                 case TLSEXT_TYPE_cert_type:
 815                 extname = "cert type";
 816                 break;
 817
 818                 case TLSEXT_TYPE_elliptic_curves:
 819                 extname = "elliptic curves";
 820                 break;
 821
 822                 case TLSEXT_TYPE_ec_point_formats:
 823                 extname = "EC point formats";
 824                 break;
 825
 826                 case TLSEXT_TYPE_srp:
 827                 extname = "SRP";
 828                 break;
 829
 830                 case TLSEXT_TYPE_signature_algorithms:
 831                 extname = "signature algorithms";
 832                 break;
 833
 834                 case TLSEXT_TYPE_use_srtp:
 835                 extname = "use SRTP";
 836                 break;
 837
 838                 case TLSEXT_TYPE_heartbeat:
 839                 extname = "heartbeat";
 840                 break;
 841
 842                 case TLSEXT_TYPE_session_ticket:
 843                 extname = "session ticket";
 844                 break;
 845
 846                 case TLSEXT_TYPE_renegotiate:
 847                 extname = "renegotiation info";
 848                 break;
 849
 850 #ifdef TLSEXT_TYPE_opaque_prf_input
 851                 case TLSEXT_TYPE_opaque_prf_input:
 852                 extname = "opaque PRF input";
 853                 break;
 854 #endif
 855 #ifdef TLSEXT_TYPE_next_proto_neg
 856                 case TLSEXT_TYPE_next_proto_neg:
 857                 extname = "next protocol";
 858                 break;
 859 #endif
 860
 861                 default:
 862                 extname = "unknown";
 863                 break;
 864
 865                 }
 866
 867         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 868                         client_server ? "server": "client",
 869                         extname, type, len);
 870         BIO_dump(bio, (char *)data, len);
 871         (void)BIO_flush(bio);
 872         }
 873
 874 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
 875         {
 876         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 877         unsigned int length, resultlength;
 878         union {
 879                 struct sockaddr sa;
 880                 struct sockaddr_in s4;
 881 #if OPENSSL_USE_IPV6
 882                 struct sockaddr_in6 s6;
 883 #endif
 884         } peer;
 885
 886         /* Initialize a random secret */
 887         if (!cookie_initialized)
 888                 {
 889                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
 890                         {
 891                         BIO_printf(bio_err,"error setting random cookie secret\n");
 892                         return 0;
 893                         }
 894                 cookie_initialized = 1;
 895                 }
 896
 897         /* Read peer information */
 898         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 899
 900         /* Create buffer with peer's address and port */
 901         length = 0;
 902         switch (peer.sa.sa_family)
 903                 {
 904         case AF_INET:
 905                 length += sizeof(struct in_addr);
 906                 length += sizeof(peer.s4.sin_port);
 907                 break;
 908 #if OPENSSL_USE_IPV6
 909         case AF_INET6:
 910                 length += sizeof(struct in6_addr);
 911                 length += sizeof(peer.s6.sin6_port);
 912                 break;
 913 #endif
 914         default:
 915                 OPENSSL_assert(0);
 916                 break;
 917                 }
 918         buffer = OPENSSL_malloc(length);
 919
 920         if (buffer == NULL)
 921                 {
 922                 BIO_printf(bio_err,"out of memory\n");
 923                 return 0;
 924                 }
 925
 926         switch (peer.sa.sa_family)
 927                 {
 928         case AF_INET:
 929                 memcpy(buffer,
 930                        &peer.s4.sin_port,
 931                        sizeof(peer.s4.sin_port));
 932                 memcpy(buffer + sizeof(peer.s4.sin_port),
 933                        &peer.s4.sin_addr,
 934                        sizeof(struct in_addr));
 935                 break;
 936 #if OPENSSL_USE_IPV6
 937         case AF_INET6:
 938                 memcpy(buffer,
 939                        &peer.s6.sin6_port,
 940                        sizeof(peer.s6.sin6_port));
 941                 memcpy(buffer + sizeof(peer.s6.sin6_port),
 942                        &peer.s6.sin6_addr,
 943                        sizeof(struct in6_addr));
 944                 break;
 945 #endif
 946         default:
 947                 OPENSSL_assert(0);
 948                 break;
 949                 }
 950
 951         /* Calculate HMAC of buffer using the secret */
 952         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
 953              buffer, length, result, &resultlength);
 954         OPENSSL_free(buffer);
 955
 956         memcpy(cookie, result, resultlength);
 957         *cookie_len = resultlength;
 958
 959         return 1;
 960         }
 961
 962 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
 963         {
 964         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 965         unsigned int length, resultlength;
 966         union {
 967                 struct sockaddr sa;
 968                 struct sockaddr_in s4;
 969 #if OPENSSL_USE_IPV6
 970                 struct sockaddr_in6 s6;
 971 #endif
 972         } peer;
 973
 974         /* If secret isn't initialized yet, the cookie can't be valid */
 975         if (!cookie_initialized)
 976                 return 0;
 977
 978         /* Read peer information */
 979         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 980
 981         /* Create buffer with peer's address and port */
 982         length = 0;
 983         switch (peer.sa.sa_family)
 984                 {
 985         case AF_INET:
 986                 length += sizeof(struct in_addr);
 987                 length += sizeof(peer.s4.sin_port);
 988                 break;
 989 #if OPENSSL_USE_IPV6
 990         case AF_INET6:
 991                 length += sizeof(struct in6_addr);
 992                 length += sizeof(peer.s6.sin6_port);
 993                 break;
 994 #endif
 995         default:
 996                 OPENSSL_assert(0);
 997                 break;
 998                 }
 999         buffer = OPENSSL_malloc(length);
1000
1001         if (buffer == NULL)
1002                 {
1003                 BIO_printf(bio_err,"out of memory\n");
1004                 return 0;
1005                 }
1006
1007         switch (peer.sa.sa_family)
1008                 {
1009         case AF_INET:
1010                 memcpy(buffer,
1011                        &peer.s4.sin_port,
1012                        sizeof(peer.s4.sin_port));
1013                 memcpy(buffer + sizeof(peer.s4.sin_port),
1014                        &peer.s4.sin_addr,
1015                        sizeof(struct in_addr));
1016                 break;
1017 #if OPENSSL_USE_IPV6
1018         case AF_INET6:
1019                 memcpy(buffer,
1020                        &peer.s6.sin6_port,
1021                        sizeof(peer.s6.sin6_port));
1022                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1023                        &peer.s6.sin6_addr,
1024                        sizeof(struct in6_addr));
1025                 break;
1026 #endif
1027         default:
1028                 OPENSSL_assert(0);
1029                 break;
1030                 }
1031
1032         /* Calculate HMAC of buffer using the secret */
1033         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1034              buffer, length, result, &resultlength);
1035         OPENSSL_free(buffer);
1036
1037         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
1038                 return 1;
1039
1040         return 0;
1041         }
1042
1043 /* Example of extended certificate handling. Where the standard support
1044  * of one certificate per algorithm is not sufficient an application
1045  * can decide which certificate(s) to use at runtime based on whatever
1046  * criteria it deems appropriate.
1047  */
1048
1049 /* Linked list of certificates, keys and chains */
1050 struct  ssl_excert_st
1051         {
1052         int certform;
1053         const char *certfile;
1054         int keyform;
1055         const char *keyfile;
1056         const char *chainfile;
1057         X509 *cert;
1058         EVP_PKEY *key;
1059         STACK_OF(X509) *chain;
1060         struct ssl_excert_st *next, *prev;
1061         };
1062
1063 /* Very basic selection callback: just use any certificate chain
1064  * reported as valid. More sophisticated could prioritise according
1065  * to local policy.
1066  */
1067 static int set_cert_cb(SSL *ssl, void *arg)
1068         {
1069         SSL_EXCERT *exc = arg;
1070         SSL_certs_clear(ssl);
1071
1072         if (!exc)
1073                 return 1;
1074
1075         /* Go to end of list and traverse backwards since we prepend
1076          * newer entries this retains the original order.
1077          */
1078         while (exc->next)
1079                 exc = exc->next;
1080
1081         while(exc)
1082                 {
1083                 if (SSL_check_chain(ssl, exc->cert, exc->key, exc->chain))
1084                         {
1085                         SSL_use_certificate(ssl, exc->cert);
1086                         SSL_use_PrivateKey(ssl, exc->key);
1087                         if (exc->chain)
1088                                 SSL_set1_chain(ssl, exc->chain);
1089                         }
1090                 exc = exc->prev;
1091                 }
1092         return 1;
1093         }
1094
1095 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
1096         {
1097         SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
1098         }
1099
1100 static int ssl_excert_prepend(SSL_EXCERT **pexc)
1101         {
1102         SSL_EXCERT *exc;
1103         exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
1104         if (!exc)
1105                 return 0;
1106         exc->certfile = NULL;
1107         exc->keyfile = NULL;
1108         exc->chainfile = NULL;
1109         exc->cert = NULL;
1110         exc->key = NULL;
1111         exc->chain = NULL;
1112         exc->prev = NULL;
1113
1114         exc->next = *pexc;
1115         *pexc = exc;
1116
1117         if (exc->next)
1118                 {
1119                 exc->certform = exc->next->certform;
1120                 exc->keyform = exc->next->keyform;
1121                 exc->next->prev = exc;
1122                 }
1123         else
1124                 {
1125                 exc->certform = FORMAT_PEM;
1126                 exc->keyform = FORMAT_PEM;
1127                 }
1128         return 1;
1129
1130         }
1131
1132 void ssl_excert_free(SSL_EXCERT *exc)
1133         {
1134         SSL_EXCERT *curr;
1135         while (exc)
1136                 {
1137                 if (exc->cert)
1138                         X509_free(exc->cert);
1139                 if (exc->key)
1140                         EVP_PKEY_free(exc->key);
1141                 if (exc->chain)
1142                         sk_X509_pop_free(exc->chain, X509_free);
1143                 curr = exc;
1144                 exc = exc->next;
1145                 OPENSSL_free(curr);
1146                 }
1147         }
1148
1149 int load_excert(SSL_EXCERT **pexc, BIO *err)
1150         {
1151         SSL_EXCERT *exc = *pexc;
1152         if (!exc)
1153                 return 1;
1154         /* If nothing in list, free and set to NULL */
1155         if (!exc->certfile && !exc->next)
1156                 {
1157                 ssl_excert_free(exc);
1158                 *pexc = NULL;
1159                 return 1;
1160                 }
1161         for(; exc; exc=exc->next)
1162                 {
1163                 if (!exc->certfile)
1164                         {
1165                         BIO_printf(err, "Missing filename\n");
1166                         return 0;
1167                         }
1168                 exc->cert = load_cert(err, exc->certfile, exc->certform,
1169                                         NULL, NULL, "Server Certificate");
1170                 if (!exc->cert)
1171                         return 0;
1172                 if (exc->keyfile)
1173                         exc->keyfile = exc->certfile;
1174                 exc->key = load_key(err, exc->certfile, exc->certform, 0,
1175                                         NULL, NULL, "Server Certificate");
1176                 if (!exc->key)
1177                         return 0;
1178                 if (exc->chainfile)
1179                         {
1180                         exc->chain = load_certs(err,
1181                                                 exc->chainfile, FORMAT_PEM,
1182                                                 NULL, NULL,
1183                                                 "Server Chain");
1184                         if (!exc->chainfile)
1185                                 return 0;
1186                         }
1187                 }
1188         return 1;
1189         }
1190
1191
1192 int args_excert(char ***pargs, int *pargc,
1193                         int *badarg, BIO *err, SSL_EXCERT **pexc)
1194         {
1195         char *arg = **pargs, *argn = (*pargs)[1];
1196         SSL_EXCERT *exc = *pexc;
1197         if (!exc && !ssl_excert_prepend(&exc))
1198                 {
1199                 BIO_printf(err, "Error initialising xcert\n");
1200                 *badarg = 1;
1201                 goto err;
1202                 }
1203         if (strcmp(arg, "-xcert") == 0)
1204                 {
1205                 if (!argn)
1206                         {
1207                         *badarg = 1;
1208                         return 1;
1209                         }
1210                 if (exc->certfile && !ssl_excert_prepend(&exc))
1211                         {
1212                         BIO_printf(err, "Error adding xcert\n");
1213                         *badarg = 1;
1214                         goto err;
1215                         }
1216                 exc->certfile = argn;
1217                 }
1218         else if (strcmp(arg,"-xkey") == 0)
1219                 {
1220                 if (!argn)
1221                         {
1222                         *badarg = 1;
1223                         return 1;
1224                         }
1225                 if (exc->keyfile)
1226                         {
1227                         BIO_printf(err, "Key already specified\n");
1228                         *badarg = 1;
1229                         return 1;
1230                         }
1231                 exc->keyfile = argn;
1232                 }
1233         else if (strcmp(arg,"-xchain") == 0)
1234                 {
1235                 if (!argn)
1236                         {
1237                         *badarg = 1;
1238                         return 1;
1239                         }
1240                 if (exc->chainfile)
1241                         {
1242                         BIO_printf(err, "Chain already specified\n");
1243                         *badarg = 1;
1244                         return 1;
1245                         }
1246                 exc->chainfile = argn;
1247                 }
1248         else if (strcmp(arg,"-xcertform") == 0)
1249                 {
1250                 if (!argn)
1251                         {
1252                         *badarg = 1;
1253                         goto err;
1254                         }
1255                 exc->certform = str2fmt(argn);
1256                 }
1257         else if (strcmp(arg,"-xkeyform") == 0)
1258                 {
1259                 if (!argn)
1260                         {
1261                         *badarg = 1;
1262                         goto err;
1263                         }
1264                 exc->keyform = str2fmt(argn);
1265                 }
1266         else
1267                 return 0;
1268
1269         (*pargs) += 2;
1270
1271         if (pargc)
1272                 *pargc -= 2;
1273
1274         *pexc = exc;
1275
1276         return 1;
1277
1278         err:
1279         ERR_print_errors(err);
1280         ssl_excert_free(exc);
1281         *pexc = NULL;
1282         return 1;
1283         }
1284