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 void ssl_print_client_cert_types(BIO *bio, SSL *s)
 289         {
 290         const unsigned char *p;
 291         int i;
 292         int cert_type_num = SSL_get0_certificate_types(s, &p);
 293         if (!cert_type_num)
 294                 return;
 295         BIO_puts(bio, "Client Certificate Types: ");
 296         for (i = 0; i < cert_type_num; i++)
 297                 {
 298                 unsigned char cert_type = p[i];
 299                 char *cname;
 300                 switch(cert_type)
 301                         {
 302                 case TLS_CT_RSA_SIGN:
 303                         cname = "RSA sign";
 304                         break;
 305
 306                 case TLS_CT_DSS_SIGN:
 307                         cname = "DSA sign";
 308                         break;
 309
 310                 case TLS_CT_RSA_FIXED_DH:
 311                         cname = "RSA fixed DH";
 312                         break;
 313
 314                 case TLS_CT_DSS_FIXED_DH:
 315                         cname = "DSS fixed DH";
 316                         break;
 317
 318                 case TLS_CT_ECDSA_SIGN:
 319                         cname = "ECDSA sign";
 320                         break;
 321
 322                 case TLS_CT_RSA_FIXED_ECDH:
 323                         cname = "RSA fixed ECDH";
 324                         break;
 325
 326                 case TLS_CT_ECDSA_FIXED_ECDH:
 327                         cname = "ECDSA fixed ECDH";
 328                         break;
 329
 330                 case TLS_CT_GOST94_SIGN:
 331                         cname = "GOST94 Sign";
 332                         break;
 333
 334                 case TLS_CT_GOST01_SIGN:
 335                         cname = "GOST01 Sign";
 336                         break;
 337
 338                 default:
 339                          cname = NULL;
 340                         }
 341
 342                 if (i)
 343                         BIO_puts(bio, ", ");
 344
 345                 if (cname)
 346                         BIO_puts(bio, cname);
 347                 else
 348                         BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 349                 }
 350         BIO_puts(bio, "\n");
 351         }
 352
 353 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 354         {
 355         int i, nsig, client;
 356         client = SSL_is_server(s) ? 0 : 1;
 357         if (shared)
 358                 nsig = SSL_get_shared_sigalgs(s, -1, NULL, NULL, NULL,
 359                                                         NULL, NULL);
 360         else
 361                 nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 362         if (nsig == 0)
 363                 return 1;
 364
 365         if (shared)
 366                 BIO_puts(out, "Shared ");
 367
 368         if (client)
 369                 BIO_puts(out, "Requested ");
 370         BIO_puts(out, "Signature Algorithms: ");
 371         for (i = 0; i < nsig; i++)
 372                 {
 373                 int hash_nid, sign_nid;
 374                 unsigned char rhash, rsign;
 375                 const char *sstr = NULL;
 376                 if (shared)
 377                         SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 378                                                         &rsign, &rhash);
 379                 else
 380                         SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 381                                                         &rsign, &rhash);
 382                 if (i)
 383                         BIO_puts(out, ":");
 384                 if (sign_nid == EVP_PKEY_RSA)
 385                         sstr = "RSA";
 386                 else if(sign_nid == EVP_PKEY_DSA)
 387                         sstr = "DSA";
 388                 else if(sign_nid == EVP_PKEY_EC)
 389                         sstr = "ECDSA";
 390                 if (sstr)
 391                         BIO_printf(out,"%s+", sstr);
 392                 else
 393                         BIO_printf(out,"0x%02X+", (int)rsign);
 394                 if (hash_nid != NID_undef)
 395                         BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
 396                 else
 397                         BIO_printf(out,"0x%02X", (int)rhash);
 398                 }
 399         BIO_puts(out, "\n");
 400         return 1;
 401         }
 402
 403 int ssl_print_sigalgs(BIO *out, SSL *s)
 404         {
 405         if (!SSL_is_server(s))
 406                 ssl_print_client_cert_types(out, s);
 407         do_print_sigalgs(out, s, 0);
 408         do_print_sigalgs(out, s, 1);
 409         return 1;
 410         }
 411
 412 int ssl_print_curves(BIO *out, SSL *s)
 413         {
 414         int i, ncurves, *curves, nid;
 415         const char *cname;
 416         ncurves = SSL_get1_curves(s, NULL);
 417         if (ncurves <= 0)
 418                 return 1;
 419         curves = OPENSSL_malloc(ncurves * sizeof(int));
 420         SSL_get1_curves(s, curves);
 421
 422         BIO_puts(out, "Supported Elliptic Curves: ");
 423         for (i = 0; i < ncurves; i++)
 424                 {
 425                 if (i)
 426                         BIO_puts(out, ":");
 427                 nid = curves[i];
 428                 /* If unrecognised print out hex version */
 429                 if (nid & TLSEXT_nid_unknown)
 430                         BIO_printf(out, "0x%04X", nid & 0xFFFF);
 431                 else
 432                         {
 433                         /* Use NIST name for curve if it exists */
 434                         cname = EC_curve_nid2nist(nid);
 435                         if (!cname)
 436                                 cname = OBJ_nid2sn(nid);
 437                         BIO_printf(out, "%s", cname);
 438                         }
 439                 }
 440         BIO_puts(out, "\nShared Elliptic curves: ");
 441         OPENSSL_free(curves);
 442         ncurves = SSL_get_shared_curve(s, -1);
 443         for (i = 0; i < ncurves; i++)
 444                 {
 445                 if (i)
 446                         BIO_puts(out, ":");
 447                 nid = SSL_get_shared_curve(s, i);
 448                 cname = EC_curve_nid2nist(nid);
 449                 if (!cname)
 450                         cname = OBJ_nid2sn(nid);
 451                 BIO_printf(out, "%s", cname);
 452                 }
 453         if (ncurves == 0)
 454                 BIO_puts(out, "NONE");
 455         BIO_puts(out, "\n");
 456         return 1;
 457         }
 458
 459
 460 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 461                                    int argi, long argl, long ret)
 462         {
 463         BIO *out;
 464
 465         out=(BIO *)BIO_get_callback_arg(bio);
 466         if (out == NULL) return(ret);
 467
 468         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 469                 {
 470                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 471                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 472                 BIO_dump(out,argp,(int)ret);
 473                 return(ret);
 474                 }
 475         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 476                 {
 477                 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 478                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 479                 BIO_dump(out,argp,(int)ret);
 480                 }
 481         return(ret);
 482         }
 483
 484 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 485         {
 486         const char *str;
 487         int w;
 488
 489         w=where& ~SSL_ST_MASK;
 490
 491         if (w & SSL_ST_CONNECT) str="SSL_connect";
 492         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 493         else str="undefined";
 494
 495         if (where & SSL_CB_LOOP)
 496                 {
 497                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 498                 }
 499         else if (where & SSL_CB_ALERT)
 500                 {
 501                 str=(where & SSL_CB_READ)?"read":"write";
 502                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 503                         str,
 504                         SSL_alert_type_string_long(ret),
 505                         SSL_alert_desc_string_long(ret));
 506                 }
 507         else if (where & SSL_CB_EXIT)
 508                 {
 509                 if (ret == 0)
 510                         BIO_printf(bio_err,"%s:failed in %s\n",
 511                                 str,SSL_state_string_long(s));
 512                 else if (ret < 0)
 513                         {
 514                         BIO_printf(bio_err,"%s:error in %s\n",
 515                                 str,SSL_state_string_long(s));
 516                         }
 517                 }
 518         }
 519
 520
 521 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 522         {
 523         BIO *bio = arg;
 524         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 525
 526         str_write_p = write_p ? ">>>" : "<<<";
 527
 528         switch (version)
 529                 {
 530         case SSL2_VERSION:
 531                 str_version = "SSL 2.0";
 532                 break;
 533         case SSL3_VERSION:
 534                 str_version = "SSL 3.0 ";
 535                 break;
 536         case TLS1_VERSION:
 537                 str_version = "TLS 1.0 ";
 538                 break;
 539         case TLS1_1_VERSION:
 540                 str_version = "TLS 1.1 ";
 541                 break;
 542         case TLS1_2_VERSION:
 543                 str_version = "TLS 1.2 ";
 544                 break;
 545         case DTLS1_VERSION:
 546                 str_version = "DTLS 1.0 ";
 547                 break;
 548         case DTLS1_BAD_VER:
 549                 str_version = "DTLS 1.0 (bad) ";
 550                 break;
 551         default:
 552                 str_version = "???";
 553                 }
 554
 555         if (version == SSL2_VERSION)
 556                 {
 557                 str_details1 = "???";
 558
 559                 if (len > 0)
 560                         {
 561                         switch (((const unsigned char*)buf)[0])
 562                                 {
 563                                 case 0:
 564                                         str_details1 = ", ERROR:";
 565                                         str_details2 = " ???";
 566                                         if (len >= 3)
 567                                                 {
 568                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 569
 570                                                 switch (err)
 571                                                         {
 572                                                 case 0x0001:
 573                                                         str_details2 = " NO-CIPHER-ERROR";
 574                                                         break;
 575                                                 case 0x0002:
 576                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 577                                                         break;
 578                                                 case 0x0004:
 579                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 580                                                         break;
 581                                                 case 0x0006:
 582                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 583                                                         break;
 584                                                         }
 585                                                 }
 586
 587                                         break;
 588                                 case 1:
 589                                         str_details1 = ", CLIENT-HELLO";
 590                                         break;
 591                                 case 2:
 592                                         str_details1 = ", CLIENT-MASTER-KEY";
 593                                         break;
 594                                 case 3:
 595                                         str_details1 = ", CLIENT-FINISHED";
 596                                         break;
 597                                 case 4:
 598                                         str_details1 = ", SERVER-HELLO";
 599                                         break;
 600                                 case 5:
 601                                         str_details1 = ", SERVER-VERIFY";
 602                                         break;
 603                                 case 6:
 604                                         str_details1 = ", SERVER-FINISHED";
 605                                         break;
 606                                 case 7:
 607                                         str_details1 = ", REQUEST-CERTIFICATE";
 608                                         break;
 609                                 case 8:
 610                                         str_details1 = ", CLIENT-CERTIFICATE";
 611                                         break;
 612                                 }
 613                         }
 614                 }
 615
 616         if (version == SSL3_VERSION ||
 617             version == TLS1_VERSION ||
 618             version == DTLS1_VERSION ||
 619             version == DTLS1_BAD_VER)
 620                 {
 621                 switch (content_type)
 622                         {
 623                 case 20:
 624                         str_content_type = "ChangeCipherSpec";
 625                         break;
 626                 case 21:
 627                         str_content_type = "Alert";
 628                         break;
 629                 case 22:
 630                         str_content_type = "Handshake";
 631                         break;
 632                         }
 633
 634                 if (content_type == 21) /* Alert */
 635                         {
 636                         str_details1 = ", ???";
 637
 638                         if (len == 2)
 639                                 {
 640                                 switch (((const unsigned char*)buf)[0])
 641                                         {
 642                                 case 1:
 643                                         str_details1 = ", warning";
 644                                         break;
 645                                 case 2:
 646                                         str_details1 = ", fatal";
 647                                         break;
 648                                         }
 649
 650                                 str_details2 = " ???";
 651                                 switch (((const unsigned char*)buf)[1])
 652                                         {
 653                                 case 0:
 654                                         str_details2 = " close_notify";
 655                                         break;
 656                                 case 10:
 657                                         str_details2 = " unexpected_message";
 658                                         break;
 659                                 case 20:
 660                                         str_details2 = " bad_record_mac";
 661                                         break;
 662                                 case 21:
 663                                         str_details2 = " decryption_failed";
 664                                         break;
 665                                 case 22:
 666                                         str_details2 = " record_overflow";
 667                                         break;
 668                                 case 30:
 669                                         str_details2 = " decompression_failure";
 670                                         break;
 671                                 case 40:
 672                                         str_details2 = " handshake_failure";
 673                                         break;
 674                                 case 42:
 675                                         str_details2 = " bad_certificate";
 676                                         break;
 677                                 case 43:
 678                                         str_details2 = " unsupported_certificate";
 679                                         break;
 680                                 case 44:
 681                                         str_details2 = " certificate_revoked";
 682                                         break;
 683                                 case 45:
 684                                         str_details2 = " certificate_expired";
 685                                         break;
 686                                 case 46:
 687                                         str_details2 = " certificate_unknown";
 688                                         break;
 689                                 case 47:
 690                                         str_details2 = " illegal_parameter";
 691                                         break;
 692                                 case 48:
 693                                         str_details2 = " unknown_ca";
 694                                         break;
 695                                 case 49:
 696                                         str_details2 = " access_denied";
 697                                         break;
 698                                 case 50:
 699                                         str_details2 = " decode_error";
 700                                         break;
 701                                 case 51:
 702                                         str_details2 = " decrypt_error";
 703                                         break;
 704                                 case 60:
 705                                         str_details2 = " export_restriction";
 706                                         break;
 707                                 case 70:
 708                                         str_details2 = " protocol_version";
 709                                         break;
 710                                 case 71:
 711                                         str_details2 = " insufficient_security";
 712                                         break;
 713                                 case 80:
 714                                         str_details2 = " internal_error";
 715                                         break;
 716                                 case 90:
 717                                         str_details2 = " user_canceled";
 718                                         break;
 719                                 case 100:
 720                                         str_details2 = " no_renegotiation";
 721                                         break;
 722                                 case 110:
 723                                         str_details2 = " unsupported_extension";
 724                                         break;
 725                                 case 111:
 726                                         str_details2 = " certificate_unobtainable";
 727                                         break;
 728                                 case 112:
 729                                         str_details2 = " unrecognized_name";
 730                                         break;
 731                                 case 113:
 732                                         str_details2 = " bad_certificate_status_response";
 733                                         break;
 734                                 case 114:
 735                                         str_details2 = " bad_certificate_hash_value";
 736                                         break;
 737                                 case 115:
 738                                         str_details2 = " unknown_psk_identity";
 739                                         break;
 740                                         }
 741                                 }
 742                         }
 743
 744                 if (content_type == 22) /* Handshake */
 745                         {
 746                         str_details1 = "???";
 747
 748                         if (len > 0)
 749                                 {
 750                                 switch (((const unsigned char*)buf)[0])
 751                                         {
 752                                 case 0:
 753                                         str_details1 = ", HelloRequest";
 754                                         break;
 755                                 case 1:
 756                                         str_details1 = ", ClientHello";
 757                                         break;
 758                                 case 2:
 759                                         str_details1 = ", ServerHello";
 760                                         break;
 761                                 case 3:
 762                                         str_details1 = ", HelloVerifyRequest";
 763                                         break;
 764                                 case 11:
 765                                         str_details1 = ", Certificate";
 766                                         break;
 767                                 case 12:
 768                                         str_details1 = ", ServerKeyExchange";
 769                                         break;
 770                                 case 13:
 771                                         str_details1 = ", CertificateRequest";
 772                                         break;
 773                                 case 14:
 774                                         str_details1 = ", ServerHelloDone";
 775                                         break;
 776                                 case 15:
 777                                         str_details1 = ", CertificateVerify";
 778                                         break;
 779                                 case 16:
 780                                         str_details1 = ", ClientKeyExchange";
 781                                         break;
 782                                 case 20:
 783                                         str_details1 = ", Finished";
 784                                         break;
 785                                         }
 786                                 }
 787                         }
 788
 789 #ifndef OPENSSL_NO_HEARTBEATS
 790                 if (content_type == 24) /* Heartbeat */
 791                         {
 792                         str_details1 = ", Heartbeat";
 793
 794                         if (len > 0)
 795                                 {
 796                                 switch (((const unsigned char*)buf)[0])
 797                                         {
 798                                 case 1:
 799                                         str_details1 = ", HeartbeatRequest";
 800                                         break;
 801                                 case 2:
 802                                         str_details1 = ", HeartbeatResponse";
 803                                         break;
 804                                         }
 805                                 }
 806                         }
 807 #endif
 808                 }
 809
 810         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);
 811
 812         if (len > 0)
 813                 {
 814                 size_t num, i;
 815
 816                 BIO_printf(bio, "   ");
 817                 num = len;
 818 #if 0
 819                 if (num > 16)
 820                         num = 16;
 821 #endif
 822                 for (i = 0; i < num; i++)
 823                         {
 824                         if (i % 16 == 0 && i > 0)
 825                                 BIO_printf(bio, "\n   ");
 826                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 827                         }
 828                 if (i < len)
 829                         BIO_printf(bio, " ...");
 830                 BIO_printf(bio, "\n");
 831                 }
 832         (void)BIO_flush(bio);
 833         }
 834
 835 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 836                                         unsigned char *data, int len,
 837                                         void *arg)
 838         {
 839         BIO *bio = arg;
 840         char *extname;
 841
 842         switch(type)
 843                 {
 844                 case TLSEXT_TYPE_server_name:
 845                 extname = "server name";
 846                 break;
 847
 848                 case TLSEXT_TYPE_max_fragment_length:
 849                 extname = "max fragment length";
 850                 break;
 851
 852                 case TLSEXT_TYPE_client_certificate_url:
 853                 extname = "client certificate URL";
 854                 break;
 855
 856                 case TLSEXT_TYPE_trusted_ca_keys:
 857                 extname = "trusted CA keys";
 858                 break;
 859
 860                 case TLSEXT_TYPE_truncated_hmac:
 861                 extname = "truncated HMAC";
 862                 break;
 863
 864                 case TLSEXT_TYPE_status_request:
 865                 extname = "status request";
 866                 break;
 867
 868                 case TLSEXT_TYPE_user_mapping:
 869                 extname = "user mapping";
 870                 break;
 871
 872                 case TLSEXT_TYPE_client_authz:
 873                 extname = "client authz";
 874                 break;
 875
 876                 case TLSEXT_TYPE_server_authz:
 877                 extname = "server authz";
 878                 break;
 879
 880                 case TLSEXT_TYPE_cert_type:
 881                 extname = "cert type";
 882                 break;
 883
 884                 case TLSEXT_TYPE_elliptic_curves:
 885                 extname = "elliptic curves";
 886                 break;
 887
 888                 case TLSEXT_TYPE_ec_point_formats:
 889                 extname = "EC point formats";
 890                 break;
 891
 892                 case TLSEXT_TYPE_srp:
 893                 extname = "SRP";
 894                 break;
 895
 896                 case TLSEXT_TYPE_signature_algorithms:
 897                 extname = "signature algorithms";
 898                 break;
 899
 900                 case TLSEXT_TYPE_use_srtp:
 901                 extname = "use SRTP";
 902                 break;
 903
 904                 case TLSEXT_TYPE_heartbeat:
 905                 extname = "heartbeat";
 906                 break;
 907
 908                 case TLSEXT_TYPE_session_ticket:
 909                 extname = "session ticket";
 910                 break;
 911
 912                 case TLSEXT_TYPE_renegotiate:
 913                 extname = "renegotiation info";
 914                 break;
 915
 916 #ifdef TLSEXT_TYPE_opaque_prf_input
 917                 case TLSEXT_TYPE_opaque_prf_input:
 918                 extname = "opaque PRF input";
 919                 break;
 920 #endif
 921 #ifdef TLSEXT_TYPE_next_proto_neg
 922                 case TLSEXT_TYPE_next_proto_neg:
 923                 extname = "next protocol";
 924                 break;
 925 #endif
 926
 927                 default:
 928                 extname = "unknown";
 929                 break;
 930
 931                 }
 932
 933         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
 934                         client_server ? "server": "client",
 935                         extname, type, len);
 936         BIO_dump(bio, (char *)data, len);
 937         (void)BIO_flush(bio);
 938         }
 939
 940 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
 941         {
 942         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
 943         unsigned int length, resultlength;
 944         union {
 945                 struct sockaddr sa;
 946                 struct sockaddr_in s4;
 947 #if OPENSSL_USE_IPV6
 948                 struct sockaddr_in6 s6;
 949 #endif
 950         } peer;
 951
 952         /* Initialize a random secret */
 953         if (!cookie_initialized)
 954                 {
 955                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
 956                         {
 957                         BIO_printf(bio_err,"error setting random cookie secret\n");
 958                         return 0;
 959                         }
 960                 cookie_initialized = 1;
 961                 }
 962
 963         /* Read peer information */
 964         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
 965
 966         /* Create buffer with peer's address and port */
 967         length = 0;
 968         switch (peer.sa.sa_family)
 969                 {
 970         case AF_INET:
 971                 length += sizeof(struct in_addr);
 972                 length += sizeof(peer.s4.sin_port);
 973                 break;
 974 #if OPENSSL_USE_IPV6
 975         case AF_INET6:
 976                 length += sizeof(struct in6_addr);
 977                 length += sizeof(peer.s6.sin6_port);
 978                 break;
 979 #endif
 980         default:
 981                 OPENSSL_assert(0);
 982                 break;
 983                 }
 984         buffer = OPENSSL_malloc(length);
 985
 986         if (buffer == NULL)
 987                 {
 988                 BIO_printf(bio_err,"out of memory\n");
 989                 return 0;
 990                 }
 991
 992         switch (peer.sa.sa_family)
 993                 {
 994         case AF_INET:
 995                 memcpy(buffer,
 996                        &peer.s4.sin_port,
 997                        sizeof(peer.s4.sin_port));
 998                 memcpy(buffer + sizeof(peer.s4.sin_port),
 999                        &peer.s4.sin_addr,
1000                        sizeof(struct in_addr));
1001                 break;
1002 #if OPENSSL_USE_IPV6
1003         case AF_INET6:
1004                 memcpy(buffer,
1005                        &peer.s6.sin6_port,
1006                        sizeof(peer.s6.sin6_port));
1007                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1008                        &peer.s6.sin6_addr,
1009                        sizeof(struct in6_addr));
1010                 break;
1011 #endif
1012         default:
1013                 OPENSSL_assert(0);
1014                 break;
1015                 }
1016
1017         /* Calculate HMAC of buffer using the secret */
1018         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1019              buffer, length, result, &resultlength);
1020         OPENSSL_free(buffer);
1021
1022         memcpy(cookie, result, resultlength);
1023         *cookie_len = resultlength;
1024
1025         return 1;
1026         }
1027
1028 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
1029         {
1030         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1031         unsigned int length, resultlength;
1032         union {
1033                 struct sockaddr sa;
1034                 struct sockaddr_in s4;
1035 #if OPENSSL_USE_IPV6
1036                 struct sockaddr_in6 s6;
1037 #endif
1038         } peer;
1039
1040         /* If secret isn't initialized yet, the cookie can't be valid */
1041         if (!cookie_initialized)
1042                 return 0;
1043
1044         /* Read peer information */
1045         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1046
1047         /* Create buffer with peer's address and port */
1048         length = 0;
1049         switch (peer.sa.sa_family)
1050                 {
1051         case AF_INET:
1052                 length += sizeof(struct in_addr);
1053                 length += sizeof(peer.s4.sin_port);
1054                 break;
1055 #if OPENSSL_USE_IPV6
1056         case AF_INET6:
1057                 length += sizeof(struct in6_addr);
1058                 length += sizeof(peer.s6.sin6_port);
1059                 break;
1060 #endif
1061         default:
1062                 OPENSSL_assert(0);
1063                 break;
1064                 }
1065         buffer = OPENSSL_malloc(length);
1066
1067         if (buffer == NULL)
1068                 {
1069                 BIO_printf(bio_err,"out of memory\n");
1070                 return 0;
1071                 }
1072
1073         switch (peer.sa.sa_family)
1074                 {
1075         case AF_INET:
1076                 memcpy(buffer,
1077                        &peer.s4.sin_port,
1078                        sizeof(peer.s4.sin_port));
1079                 memcpy(buffer + sizeof(peer.s4.sin_port),
1080                        &peer.s4.sin_addr,
1081                        sizeof(struct in_addr));
1082                 break;
1083 #if OPENSSL_USE_IPV6
1084         case AF_INET6:
1085                 memcpy(buffer,
1086                        &peer.s6.sin6_port,
1087                        sizeof(peer.s6.sin6_port));
1088                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1089                        &peer.s6.sin6_addr,
1090                        sizeof(struct in6_addr));
1091                 break;
1092 #endif
1093         default:
1094                 OPENSSL_assert(0);
1095                 break;
1096                 }
1097
1098         /* Calculate HMAC of buffer using the secret */
1099         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1100              buffer, length, result, &resultlength);
1101         OPENSSL_free(buffer);
1102
1103         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
1104                 return 1;
1105
1106         return 0;
1107         }
1108
1109 /* Example of extended certificate handling. Where the standard support
1110  * of one certificate per algorithm is not sufficient an application
1111  * can decide which certificate(s) to use at runtime based on whatever
1112  * criteria it deems appropriate.
1113  */
1114
1115 /* Linked list of certificates, keys and chains */
1116 struct  ssl_excert_st
1117         {
1118         int certform;
1119         const char *certfile;
1120         int keyform;
1121         const char *keyfile;
1122         const char *chainfile;
1123         X509 *cert;
1124         EVP_PKEY *key;
1125         STACK_OF(X509) *chain;
1126         struct ssl_excert_st *next, *prev;
1127         };
1128
1129 /* Very basic selection callback: just use any certificate chain
1130  * reported as valid. More sophisticated could prioritise according
1131  * to local policy.
1132  */
1133 static int set_cert_cb(SSL *ssl, void *arg)
1134         {
1135         SSL_EXCERT *exc = arg;
1136         SSL_certs_clear(ssl);
1137
1138         if (!exc)
1139                 return 1;
1140
1141         /* Go to end of list and traverse backwards since we prepend
1142          * newer entries this retains the original order.
1143          */
1144         while (exc->next)
1145                 exc = exc->next;
1146
1147         while(exc)
1148                 {
1149                 if (SSL_check_chain(ssl, exc->cert, exc->key, exc->chain))
1150                         {
1151                         SSL_use_certificate(ssl, exc->cert);
1152                         SSL_use_PrivateKey(ssl, exc->key);
1153                         if (exc->chain)
1154                                 SSL_set1_chain(ssl, exc->chain);
1155                         }
1156                 exc = exc->prev;
1157                 }
1158         return 1;
1159         }
1160
1161 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
1162         {
1163         SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
1164         }
1165
1166 static int ssl_excert_prepend(SSL_EXCERT **pexc)
1167         {
1168         SSL_EXCERT *exc;
1169         exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
1170         if (!exc)
1171                 return 0;
1172         exc->certfile = NULL;
1173         exc->keyfile = NULL;
1174         exc->chainfile = NULL;
1175         exc->cert = NULL;
1176         exc->key = NULL;
1177         exc->chain = NULL;
1178         exc->prev = NULL;
1179
1180         exc->next = *pexc;
1181         *pexc = exc;
1182
1183         if (exc->next)
1184                 {
1185                 exc->certform = exc->next->certform;
1186                 exc->keyform = exc->next->keyform;
1187                 exc->next->prev = exc;
1188                 }
1189         else
1190                 {
1191                 exc->certform = FORMAT_PEM;
1192                 exc->keyform = FORMAT_PEM;
1193                 }
1194         return 1;
1195
1196         }
1197
1198 void ssl_excert_free(SSL_EXCERT *exc)
1199         {
1200         SSL_EXCERT *curr;
1201         while (exc)
1202                 {
1203                 if (exc->cert)
1204                         X509_free(exc->cert);
1205                 if (exc->key)
1206                         EVP_PKEY_free(exc->key);
1207                 if (exc->chain)
1208                         sk_X509_pop_free(exc->chain, X509_free);
1209                 curr = exc;
1210                 exc = exc->next;
1211                 OPENSSL_free(curr);
1212                 }
1213         }
1214
1215 int load_excert(SSL_EXCERT **pexc, BIO *err)
1216         {
1217         SSL_EXCERT *exc = *pexc;
1218         if (!exc)
1219                 return 1;
1220         /* If nothing in list, free and set to NULL */
1221         if (!exc->certfile && !exc->next)
1222                 {
1223                 ssl_excert_free(exc);
1224                 *pexc = NULL;
1225                 return 1;
1226                 }
1227         for(; exc; exc=exc->next)
1228                 {
1229                 if (!exc->certfile)
1230                         {
1231                         BIO_printf(err, "Missing filename\n");
1232                         return 0;
1233                         }
1234                 exc->cert = load_cert(err, exc->certfile, exc->certform,
1235                                         NULL, NULL, "Server Certificate");
1236                 if (!exc->cert)
1237                         return 0;
1238                 if (exc->keyfile)
1239                         exc->keyfile = exc->certfile;
1240                 exc->key = load_key(err, exc->certfile, exc->certform, 0,
1241                                         NULL, NULL, "Server Certificate");
1242                 if (!exc->key)
1243                         return 0;
1244                 if (exc->chainfile)
1245                         {
1246                         exc->chain = load_certs(err,
1247                                                 exc->chainfile, FORMAT_PEM,
1248                                                 NULL, NULL,
1249                                                 "Server Chain");
1250                         if (!exc->chainfile)
1251                                 return 0;
1252                         }
1253                 }
1254         return 1;
1255         }
1256
1257
1258 int args_excert(char ***pargs, int *pargc,
1259                         int *badarg, BIO *err, SSL_EXCERT **pexc)
1260         {
1261         char *arg = **pargs, *argn = (*pargs)[1];
1262         SSL_EXCERT *exc = *pexc;
1263         if (!exc)
1264                 {
1265                 if (ssl_excert_prepend(&exc))
1266                         *pexc = exc;
1267                 else
1268                         {
1269                         BIO_printf(err, "Error initialising xcert\n");
1270                         *badarg = 1;
1271                         goto err;
1272                         }
1273                 }
1274         if (strcmp(arg, "-xcert") == 0)
1275                 {
1276                 if (!argn)
1277                         {
1278                         *badarg = 1;
1279                         return 1;
1280                         }
1281                 if (exc->certfile && !ssl_excert_prepend(&exc))
1282                         {
1283                         BIO_printf(err, "Error adding xcert\n");
1284                         *badarg = 1;
1285                         goto err;
1286                         }
1287                 exc->certfile = argn;
1288                 }
1289         else if (strcmp(arg,"-xkey") == 0)
1290                 {
1291                 if (!argn)
1292                         {
1293                         *badarg = 1;
1294                         return 1;
1295                         }
1296                 if (exc->keyfile)
1297                         {
1298                         BIO_printf(err, "Key already specified\n");
1299                         *badarg = 1;
1300                         return 1;
1301                         }
1302                 exc->keyfile = argn;
1303                 }
1304         else if (strcmp(arg,"-xchain") == 0)
1305                 {
1306                 if (!argn)
1307                         {
1308                         *badarg = 1;
1309                         return 1;
1310                         }
1311                 if (exc->chainfile)
1312                         {
1313                         BIO_printf(err, "Chain already specified\n");
1314                         *badarg = 1;
1315                         return 1;
1316                         }
1317                 exc->chainfile = argn;
1318                 }
1319         else if (strcmp(arg,"-xcertform") == 0)
1320                 {
1321                 if (!argn)
1322                         {
1323                         *badarg = 1;
1324                         goto err;
1325                         }
1326                 exc->certform = str2fmt(argn);
1327                 }
1328         else if (strcmp(arg,"-xkeyform") == 0)
1329                 {
1330                 if (!argn)
1331                         {
1332                         *badarg = 1;
1333                         goto err;
1334                         }
1335                 exc->keyform = str2fmt(argn);
1336                 }
1337         else
1338                 return 0;
1339
1340         (*pargs) += 2;
1341
1342         if (pargc)
1343                 *pargc -= 2;
1344
1345         *pexc = exc;
1346
1347         return 1;
1348
1349         err:
1350         ERR_print_errors(err);
1351         ssl_excert_free(exc);
1352         *pexc = NULL;
1353         return 1;
1354         }
1355