tests/openpgpself.c

   1 /*
   2  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation
   3  *
   4  * Author: Simon Josefsson
   5  *
   6  * This file is part of GNUTLS.
   7  *
   8  * GNUTLS is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * GNUTLS is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with GNUTLS; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 /* Parts copied from GnuTLS example programs. */
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include <config.h>
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 #include <netinet/in.h>
  34 #include <sys/socket.h>
  35 #include <sys/wait.h>
  36 #include <arpa/inet.h>
  37 #include <unistd.h>
  38 #include <gnutls/gnutls.h>
  39 #include <gnutls/openpgp.h>
  40
  41 #include "utils.h"
  42
  43 #include "ex-session-info.c"
  44 #include "ex-x509-info.c"
  45 #include "tcp.c"
  46
  47 pid_t child;
  48
  49 static void
  50 tls_log_func (int level, const char *str)
  51 {
  52   fprintf (stderr, "%s |<%d>| %s", child ? "server" : "client", level, str);
  53 }
  54
  55 /* A very basic TLS client, with anonymous authentication.
  56  */
  57
  58 #define MAX_BUF 1024
  59 #define MSG "Hello TLS"
  60
  61 static unsigned char cert_txt[] =
  62   "-----BEGIN PGP PUBLIC KEY BLOCK-----\n"
  63   "Version: GnuPG v1.0.6 (GNU/Linux)\n"
  64   "Comment: For info see http://www.gnupg.org\n"
  65   "\n"
  66   "mQGiBDxnlY0RBACAsWUhi/goBvpvTBgL8fFPwBAuD04VYFEtC7+4pBp6kFsHjUR7\n"
  67   "TTUkBsOk2PvMHrDdv0+C4x2CH8YGP1e+O0f2yLWk8Uu+kkF12yiqbbvDEiCdeJT6\n"
  68   "c3vIstY8vJ9Jso5g/LB8Xggq88R7jXFS3hH+WC5v/6P6SARfzXl457cVewCgvxSf\n"
  69   "Gsm9mFospJ0B3RGyg5MB0d8D/RQQryJCGdR2nLe4VfctPL2QBD/1XhtubqEbetaV\n"
  70   "PxssqrJdA+eplBRT7UHokSBahM8gmSmNuSrLDujPfEtaMg6YIkB+Kq0VeJLE0cXT\n"
  71   "ZIH29KJlI/qk1xG4K7D6B0cKaHC/L4BIoKcQLJzfTIPw3frS4jVeNaQZNHSVqZ8/\n"
  72   "VmOMA/9rkNtccQ4RVd9WTFoHKvT4vfiISEOIzKGmcBY9Hymq7MCci3mNe4CDImkv\n"
  73   "ZgnjDlJAM91CX1ODthPLBqvyhnMhhxDnaDl4Nh42uPMSr9JEW2IwoIbFne10ihGT\n"
  74   "O4lBS1C28UfSGEMm/8JBMtxAjbYy3BYzUtCMA+bGBG6Voe5i5LQlRHIuIFdobyAo\n"
  75   "Tm8gY29tbWVudHMpIDx3aG9Ad2hvaXMub3JnPohdBBMRAgAdBQI8Z5WNBQkDwmcA\n"
  76   "BQsHCgMEAxUDAgMWAgECF4AACgkQNRRc6qfZPD+WWACfeJnLyfbpTDB7mDh3aATb\n"
  77   "+0PXz28AoKRdApBVM6Bty+vWyXH6HfF6ZTj+\n"
  78   "=m8dH\n" "-----END PGP PUBLIC KEY BLOCK-----\n";
  79 const gnutls_datum_t cert = { cert_txt, sizeof (cert_txt) };
  80
  81 static unsigned char key_txt[] =
  82   "-----BEGIN PGP PRIVATE KEY BLOCK-----\n"
  83   "Version: GnuPG v1.0.6 (GNU/Linux)\n"
  84   "Comment: For info see http://www.gnupg.org\n"
  85   "\n"
  86   "lQG7BDxnlY0RBACAsWUhi/goBvpvTBgL8fFPwBAuD04VYFEtC7+4pBp6kFsHjUR7\n"
  87   "TTUkBsOk2PvMHrDdv0+C4x2CH8YGP1e+O0f2yLWk8Uu+kkF12yiqbbvDEiCdeJT6\n"
  88   "c3vIstY8vJ9Jso5g/LB8Xggq88R7jXFS3hH+WC5v/6P6SARfzXl457cVewCgvxSf\n"
  89   "Gsm9mFospJ0B3RGyg5MB0d8D/RQQryJCGdR2nLe4VfctPL2QBD/1XhtubqEbetaV\n"
  90   "PxssqrJdA+eplBRT7UHokSBahM8gmSmNuSrLDujPfEtaMg6YIkB+Kq0VeJLE0cXT\n"
  91   "ZIH29KJlI/qk1xG4K7D6B0cKaHC/L4BIoKcQLJzfTIPw3frS4jVeNaQZNHSVqZ8/\n"
  92   "VmOMA/9rkNtccQ4RVd9WTFoHKvT4vfiISEOIzKGmcBY9Hymq7MCci3mNe4CDImkv\n"
  93   "ZgnjDlJAM91CX1ODthPLBqvyhnMhhxDnaDl4Nh42uPMSr9JEW2IwoIbFne10ihGT\n"
  94   "O4lBS1C28UfSGEMm/8JBMtxAjbYy3BYzUtCMA+bGBG6Voe5i5AAAnjMCLPrxGdgE\n"
  95   "I0xXdwCQ4Sh2diNECAj9JiM6RFNBX2ZhY3RvcjoAAK9cun7/j4AUMmdvIy5UMJph\n"
  96   "A6eq6atP/SYjOkRTQV9mYWN0b3I6AACvVjUuomodmmyCggPHWdeVSzpX3ODEHf0m\n"
  97   "IzpEU0FfZmFjdG9yOgAAr2Iv9H2aSH+vJKGYW/BO4ehQwwFck7u0JURyLiBXaG8g\n"
  98   "KE5vIGNvbW1lbnRzKSA8d2hvQHdob2lzLm9yZz6IXQQTEQIAHQUCPGeVjQUJA8Jn\n"
  99   "AAULBwoDBAMVAwIDFgIBAheAAAoJEDUUXOqn2Tw/llgAnjBPQdWxIqBCQGlcI2K/\n"
 100   "gLkZR1ARAJ9kaAeJYERc0bV/vlm0ot7UDdr+bQ==\n"
 101   "=4M0W\n" "-----END PGP PRIVATE KEY BLOCK-----\n";
 102 const gnutls_datum_t key = { key_txt, sizeof (key_txt) };
 103
 104 static void
 105 client (void)
 106 {
 107   int ret, sd, ii;
 108   gnutls_session_t session;
 109   char buffer[MAX_BUF + 1];
 110   gnutls_certificate_credentials_t xcred;
 111
 112   gnutls_global_init ();
 113
 114   gnutls_global_set_log_function (tls_log_func);
 115   gnutls_global_set_log_level (2);
 116
 117   gnutls_certificate_allocate_credentials (&xcred);
 118
 119   /* sets the trusted cas file
 120    */
 121   success ("Setting key files...\n");
 122
 123   ret = gnutls_certificate_set_openpgp_key_mem (xcred, &cert, &key,
 124                                                 GNUTLS_OPENPGP_FMT_BASE64);
 125   if (ret < 0)
 126     {
 127       fail ("Could not set key files...\n");
 128     }
 129
 130   /* Initialize TLS session
 131    */
 132   gnutls_init (&session, GNUTLS_CLIENT);
 133
 134   /* Use default priorities */
 135   gnutls_set_default_priority (session);
 136
 137   /* put the x509 credentials to the current session
 138    */
 139   gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, xcred);
 140
 141   /* connect to the peer
 142    */
 143   success ("Connecting...\n");
 144   sd = tcp_connect ();
 145
 146   gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
 147
 148   /* Perform the TLS handshake
 149    */
 150   ret = gnutls_handshake (session);
 151
 152   if (ret < 0)
 153     {
 154       fail ("client: Handshake failed\n");
 155       gnutls_perror (ret);
 156       goto end;
 157     }
 158   else
 159     {
 160       success ("client: Handshake was completed\n");
 161     }
 162
 163   success ("client: TLS version is: %s\n",
 164            gnutls_protocol_get_name (gnutls_protocol_get_version (session)));
 165
 166   /* see the Getting peer's information example */
 167   print_info (session);
 168
 169   gnutls_record_send (session, MSG, strlen (MSG));
 170
 171   ret = gnutls_record_recv (session, buffer, MAX_BUF);
 172   if (ret == 0)
 173     {
 174       success ("client: Peer has closed the TLS connection\n");
 175       goto end;
 176     }
 177   else if (ret < 0)
 178     {
 179       fail ("client: Error: %s\n", gnutls_strerror (ret));
 180       goto end;
 181     }
 182
 183   printf ("- Received %d bytes: ", ret);
 184   for (ii = 0; ii < ret; ii++)
 185     {
 186       fputc (buffer[ii], stdout);
 187     }
 188   fputs ("\n", stdout);
 189
 190   gnutls_bye (session, GNUTLS_SHUT_RDWR);
 191
 192 end:
 193
 194   tcp_close (sd);
 195
 196   gnutls_deinit (session);
 197
 198   gnutls_certificate_free_credentials (xcred);
 199
 200   gnutls_global_deinit ();
 201 }
 202
 203 /* This is a sample TLS 1.0 echo server, using X.509 authentication.
 204  */
 205
 206 #define SA struct sockaddr
 207 #define MAX_BUF 1024
 208 #define PORT 5556               /* listen to 5556 port */
 209 #define DH_BITS 1024
 210
 211 /* These are global */
 212 gnutls_certificate_credentials_t pgp_cred;
 213
 214 static gnutls_session_t
 215 initialize_tls_session (void)
 216 {
 217   gnutls_session_t session;
 218
 219   gnutls_init (&session, GNUTLS_SERVER);
 220
 221   /* avoid calling all the priority functions, since the defaults
 222    * are adequate.
 223    */
 224   gnutls_set_default_priority (session);
 225
 226   gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, pgp_cred);
 227
 228   /* request client certificate if any.
 229    */
 230   gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUEST);
 231
 232   gnutls_dh_set_prime_bits (session, DH_BITS);
 233
 234   return session;
 235 }
 236
 237 static gnutls_dh_params_t dh_params;
 238
 239 static int
 240 generate_dh_params (void)
 241 {
 242   const gnutls_datum_t p3 = { (char*) pkcs3, strlen (pkcs3) };
 243   /* Generate Diffie-Hellman parameters - for use with DHE
 244    * kx algorithms. These should be discarded and regenerated
 245    * once a day, once a week or once a month. Depending on the
 246    * security requirements.
 247    */
 248   gnutls_dh_params_init (&dh_params);
 249   return gnutls_dh_params_import_pkcs3 (dh_params, &p3, GNUTLS_X509_FMT_PEM);
 250 }
 251
 252 int err, listen_sd, i;
 253 int sd, ret;
 254 struct sockaddr_in sa_serv;
 255 struct sockaddr_in sa_cli;
 256 int client_len;
 257 char topbuf[512];
 258 gnutls_session_t session;
 259 char buffer[MAX_BUF + 1];
 260 int optval = 1;
 261
 262 static unsigned char server_crt_txt[] =
 263   "-----BEGIN PGP PUBLIC KEY BLOCK-----\n"
 264   "Version: GnuPG v1.4.6 (GNU/Linux)\n"
 265   "\n"
 266   "mNEER2PogwEGINdIR4u5PR4SwADWwj/ztgtoi7XVbmlfbQTHpBYFxTSC88pISSNy\n"
 267   "V/rgnlqunYP77F7aHL4KUReN3v9sKw01xSGEfox/JmlqUUg6CVvTjdeLfkuVIBnH\n"
 268   "j+2KMlaxezp7IxtPaTXpXcSf8iOuVq7UX7p6tKbppKXO5GgmfA88VUVvGBs1/PQp\n"
 269   "WKQdGrj+6I3RRmDN/hna1jGU/N23230Hbx+bu7g9cviiSh10ri7rdDhVJ67tRkRG\n"
 270   "Usy3XO6dWC7EmzZlEO8AEQEAAbQQdGVzdDMuZ251dGxzLm9yZ4kBAAQTAQIAJgUC\n"
 271   "R2PogwIbAwUJCWYBgAYLCQgHAwIEFQIIAwQWAgMBAh4BAheAAAoJEKAh4/gImZBR\n"
 272   "96QGH3E3zynETuQS3++hGMvMXq2mDJeT2e8964y/ifIOBpr2K2isuLYnrtGKyxi+\n"
 273   "ZptyHv6ymR3bDvio50cjnoT/WK1onosOJvtijGBS+U/ooq3im7ExpeQYXc/zpYsX\n"
 274   "OmB5m6BvdomUp2PMqdxsmOPoaRkSYx5R2Rlo/z3csodl6sp3k465Y/jg7L4gkxDz\n"
 275   "XJM+CS1xMhcOF0gBhppqLnG67x0ow847Pydstzkw0sOqedkLPuScaHNnlAWQ7QH6\n"
 276   "mbbpqHJwekS4jQRHiKV8AQQA0iZ81WXypLI4ZE2+hYfBCnfMVfQF/vPgvASxhwri\n"
 277   "GDa9Zc2f/VfakfNiwZgHH6iCeppHBiP2jljnbuOsL6f1R+0FsnyTVwHbuEU7IU2y\n"
 278   "+J0/s0z3wcx9sx8T7brP5z5F2hdagBsD9YFGCifHDAEew4mmAisY0i2QHVIuXJFj\n"
 279   "4RMAEQEAAYkBhwQYAQIADwUCR4ilfAIbAgUJEOrPgACoCRCgIeP4CJmQUZ0gBBkB\n"
 280   "AgAGBQJHiKV8AAoJEIN7b7QuD+F2AEcEAKAjhO9kSOE8UuwEOKlwsWL9LUUSkHJj\n"
 281   "c/ca0asLAerzrHsldRAcwCbWkVxBBHySw2CLFjzpgdXhwRtsytMgHaapfAPbinAW\n"
 282   "jCPIEJx2gDZeZnTgi4DVbZn5E3UzHGyL69MEoXr5t+vpiemQFd/nGD+h/Q2A76od\n"
 283   "gvAryRvS1Soj8bcGHjUflayXGOSvaD8P2V5Vz0hS82QZcqWxD8qUBqbcB8atokmO\n"
 284   "IYxhKyRmO58T5Ma+iaxBTUIwee+pBYDgdH6E2dh9xLlwwzZKaCcIRCQcObkLsMVo\n"
 285   "fZJo+m0Xf8zI57NeQF+hXJhW7lIrWgQVr8IVp/lgo76acLHfL/t1n0Nhg4r2srz2\n"
 286   "fpP2w5laQ0qImYLnZhGFHU+rJUyFaHfhD8/svN2LuZkO570pjV/K68EaHnEfk5b8\n"
 287   "jWu/euohwcCwf20M1kTo3Bg=\n"
 288   "=Xjon\n" "-----END PGP PUBLIC KEY BLOCK-----\n";
 289 const gnutls_datum_t server_crt = { server_crt_txt, sizeof (server_crt_txt) };
 290
 291 static unsigned char server_key_txt[] =
 292   "-----BEGIN PGP PRIVATE KEY BLOCK-----\n"
 293   "Version: GnuPG v1.4.6 (GNU/Linux)\n"
 294   "\n"
 295   "lQLGBEdj6IMBBiDXSEeLuT0eEsAA1sI/87YLaIu11W5pX20Ex6QWBcU0gvPKSEkj\n"
 296   "clf64J5arp2D++xe2hy+ClEXjd7/bCsNNcUhhH6MfyZpalFIOglb043Xi35LlSAZ\n"
 297   "x4/tijJWsXs6eyMbT2k16V3En/Ijrlau1F+6erSm6aSlzuRoJnwPPFVFbxgbNfz0\n"
 298   "KVikHRq4/uiN0UZgzf4Z2tYxlPzdt9t9B28fm7u4PXL4okoddK4u63Q4VSeu7UZE\n"
 299   "RlLMt1zunVguxJs2ZRDvABEBAAEABhwMx6crpb75ko5gXl9gsYSMj9O/YyCvU7Fi\n"
 300   "l8FnZ0dKMz3qs7jXyFlttLjh1DzYkXN6PAN5yp3+wnbK/e5eVeNSdo2WpJOwrVWO\n"
 301   "7pcQovHoKklAjmU98olaRhpv6BBTK+0tGUFaRrmrrYuz2xnwf3+kIpt4ahYW2dr9\n"
 302   "B+/pvBSVC/sv2+3PEQSsXlWCYVgkQ7WBN4GQdyjjxhQpcWdf8Z6unx4zuS3s7GGM\n"
 303   "4WaDxmDNCFlTGdrKPQeogtS3LVF9OiRCOvIlAxDmDvnC3zAwO/IvDUHFED9x9hmK\n"
 304   "MeVwCg8rwDMptVYN2hm+bjNzjV4pimUVd+w7edjEky0Jd/6tTH01CBUWxs9Pfup2\n"
 305   "cQ9zkYcVz1bwcoqeyRzFCJgi6PiVT38QFEvyusoVkwMQ747D6p7y+R52MEcIvcLb\n"
 306   "lBXhRviz3rW+Sch4+ohUPvBU41saM5B6UcOmhdPfdvPriI4qXwFxusGWt98NN3aW\n"
 307   "Ns2/L9kMX/SWnN6Elfj5hrrExDZ2CE60uuvfj+O/uXfO8LUDENE4vQrC399KLbJw\n"
 308   "uCaqjqLysYA9EY/Nv8RFGkk1UM4ViW8v1/95D95F9WqochSYH8Phr3br0chDxofb\n"
 309   "rnm6dUPE8uiriNaKWdoiUNSuvumh9lVixmRI923+4imu3scq+rlJAZ20EHRlc3Qz\n"
 310   "LmdudXRscy5vcmeJAQAEEwECACYFAkdj6IMCGwMFCQlmAYAGCwkIBwMCBBUCCAME\n"
 311   "FgIDAQIeAQIXgAAKCRCgIeP4CJmQUfekBh9xN88pxE7kEt/voRjLzF6tpgyXk9nv\n"
 312   "PeuMv4nyDgaa9itorLi2J67RissYvmabch7+spkd2w74qOdHI56E/1itaJ6LDib7\n"
 313   "YoxgUvlP6KKt4puxMaXkGF3P86WLFzpgeZugb3aJlKdjzKncbJjj6GkZEmMeUdkZ\n"
 314   "aP893LKHZerKd5OOuWP44Oy+IJMQ81yTPgktcTIXDhdIAYaaai5xuu8dKMPOOz8n\n"
 315   "bLc5MNLDqnnZCz7knGhzZ5QFkO0B+pm26ahycHpEnQHXBEeIpXwBBADSJnzVZfKk\n"
 316   "sjhkTb6Fh8EKd8xV9AX+8+C8BLGHCuIYNr1lzZ/9V9qR82LBmAcfqIJ6mkcGI/aO\n"
 317   "WOdu46wvp/VH7QWyfJNXAdu4RTshTbL4nT+zTPfBzH2zHxPtus/nPkXaF1qAGwP1\n"
 318   "gUYKJ8cMAR7DiaYCKxjSLZAdUi5ckWPhEwARAQABAAP3QKGVoNi52HXEN3ttUCyB\n"
 319   "Q1CDurh0MLDQoHomY3MGfI4VByk2YKMb2el4IJqyHrUbBYjTpHY31W2CSIdWfoTU\n"
 320   "DIik49CQaUpR13dJXEiG4d+nyETFutEalTQI4hMjABD9l1XvZP7Ll3YWmqN8Cam5\n"
 321   "JY23YAy2Noqbc3AcEut4+QIA1zcv8EU1QVqOwjSybRdm6HKK/A2bMqnITeUR/ikm\n"
 322   "IuU4lhijm/d1qS6ZBehRvvYa9MY4V7BGEQLWSlyc5aYJ/wIA+fmRv0lHSs78QSUg\n"
 323   "uRbNv6Aa6CXEOXmG+TpIaf/RWrPmBpdG8AROBVo1wmwG8oQaIjeX3RjKXfL3HTDD\n"
 324   "CxNg7QIA06tApdo2j1gr3IrroUwQ7yvi56ELB1Lv+W3WLN8lzCfQ6Fs+7IJRrC2R\n"
 325   "0uzLMGOsSORGAFIbAuLIMpc6rHCeS50hiQGHBBgBAgAPBQJHiKV8AhsCBQkQ6s+A\n"
 326   "AKgJEKAh4/gImZBRnSAEGQECAAYFAkeIpXwACgkQg3tvtC4P4XYARwQAoCOE72RI\n"
 327   "4TxS7AQ4qXCxYv0tRRKQcmNz9xrRqwsB6vOseyV1EBzAJtaRXEEEfJLDYIsWPOmB\n"
 328   "1eHBG2zK0yAdpql8A9uKcBaMI8gQnHaANl5mdOCLgNVtmfkTdTMcbIvr0wShevm3\n"
 329   "6+mJ6ZAV3+cYP6H9DYDvqh2C8CvJG9LVKiPxtwYeNR+VrJcY5K9oPw/ZXlXPSFLz\n"
 330   "ZBlypbEPypQGptwHxq2iSY4hjGErJGY7nxPkxr6JrEFNQjB576kFgOB0foTZ2H3E\n"
 331   "uXDDNkpoJwhEJBw5uQuwxWh9kmj6bRd/zMjns15AX6FcmFbuUitaBBWvwhWn+WCj\n"
 332   "vppwsd8v+3WfQ2GDivayvPZ+k/bDmVpDSoiZgudmEYUdT6slTIVod+EPz+y83Yu5\n"
 333   "mQ7nvSmNX8rrwRoecR+TlvyNa7966iHBwLB/bQzWROjcGA==\n"
 334   "=mZnW\n" "-----END PGP PRIVATE KEY BLOCK-----\n";
 335 const gnutls_datum_t server_key = { server_key_txt, sizeof (server_key_txt) };
 336
 337 static void
 338 server_start (void)
 339 {
 340   /* Socket operations
 341    */
 342   listen_sd = socket (AF_INET, SOCK_STREAM, 0);
 343   if (err == -1)
 344     {
 345       perror ("socket");
 346       fail ("server: socket failed\n");
 347       return;
 348     }
 349
 350   memset (&sa_serv, '\0', sizeof (sa_serv));
 351   sa_serv.sin_family = AF_INET;
 352   sa_serv.sin_addr.s_addr = INADDR_ANY;
 353   sa_serv.sin_port = htons (PORT);      /* Server Port number */
 354
 355   setsockopt (listen_sd, SOL_SOCKET, SO_REUSEADDR, (void *) &optval, sizeof (int));
 356
 357   err = bind (listen_sd, (SA *) & sa_serv, sizeof (sa_serv));
 358   if (err == -1)
 359     {
 360       perror ("bind");
 361       fail ("server: bind failed\n");
 362       return;
 363     }
 364
 365   err = listen (listen_sd, 1024);
 366   if (err == -1)
 367     {
 368       perror ("listen");
 369       fail ("server: listen failed\n");
 370       return;
 371     }
 372
 373   success ("server: ready. Listening to port '%d'.\n", PORT);
 374 }
 375
 376 static void
 377 server (void)
 378 {
 379   /* this must be called once in the program
 380    */
 381   gnutls_global_init ();
 382
 383   gnutls_global_set_log_function (tls_log_func);
 384   if (debug)
 385     gnutls_global_set_log_level (4711);
 386
 387   gnutls_certificate_allocate_credentials (&pgp_cred);
 388
 389   ret = gnutls_certificate_set_openpgp_key_mem2 (pgp_cred, &server_crt,
 390                                                  &server_key, "auto",
 391                                                  GNUTLS_OPENPGP_FMT_BASE64);
 392   if (err < 0)
 393     {
 394       fail ("Could not set server key files...\n");
 395     }
 396
 397   success ("Launched, setting DH parameters...\n");
 398
 399   generate_dh_params ();
 400
 401   gnutls_certificate_set_dh_params (pgp_cred, dh_params);
 402
 403   client_len = sizeof (sa_cli);
 404
 405   session = initialize_tls_session ();
 406
 407   sd = accept (listen_sd, (SA *) & sa_cli, &client_len);
 408
 409   success ("server: connection from %s, port %d\n",
 410            inet_ntop (AF_INET, &sa_cli.sin_addr, topbuf,
 411                       sizeof (topbuf)), ntohs (sa_cli.sin_port));
 412
 413   gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
 414   ret = gnutls_handshake (session);
 415   if (ret < 0)
 416     {
 417       close (sd);
 418       gnutls_deinit (session);
 419       fail ("server: Handshake has failed (%s)\n\n", gnutls_strerror (ret));
 420       return;
 421     }
 422   success ("server: Handshake was completed\n");
 423
 424   success ("server: TLS version is: %s\n",
 425            gnutls_protocol_get_name (gnutls_protocol_get_version (session)));
 426
 427   /* see the Getting peer's information example */
 428   print_info (session);
 429
 430   i = 0;
 431   for (;;)
 432     {
 433       memset (buffer, 0, MAX_BUF + 1);
 434       ret = gnutls_record_recv (session, buffer, MAX_BUF);
 435
 436       if (ret == 0)
 437         {
 438           success ("server: Peer has closed the GNUTLS connection\n");
 439           break;
 440         }
 441       else if (ret < 0)
 442         {
 443           fail ("server: Received corrupted data(%d). Closing...\n", ret);
 444           break;
 445         }
 446       else if (ret > 0)
 447         {
 448           /* echo data back to the client
 449            */
 450           gnutls_record_send (session, buffer, strlen (buffer));
 451         }
 452     }
 453   /* do not wait for the peer to close the connection.
 454    */
 455   gnutls_bye (session, GNUTLS_SHUT_WR);
 456
 457   close (sd);
 458   gnutls_deinit (session);
 459
 460   close (listen_sd);
 461
 462   gnutls_certificate_free_credentials (pgp_cred);
 463
 464   gnutls_dh_params_deinit (dh_params);
 465
 466   gnutls_global_deinit ();
 467
 468   success ("server: finished\n");
 469 }
 470
 471
 472 void
 473 doit (void)
 474 {
 475   server_start ();
 476   if (error_count)
 477     return;
 478
 479   child = fork ();
 480   if (child < 0)
 481     {
 482       perror ("fork");
 483       fail ("fork");
 484       return;
 485     }
 486
 487   if (child)
 488     {
 489       int status;
 490       /* parent */
 491       server ();
 492       wait (&status);
 493     }
 494   else
 495     client ();
 496 }