tests/mini-handshake-timeout.c

   1 /*
   2  * Copyright (C) 2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   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 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #if defined(_WIN32)
  32
  33 int main()
  34 {
  35         exit(77);
  36 }
  37
  38 #else
  39
  40 #include <sys/types.h>
  41 #include <netinet/in.h>
  42 #include <sys/socket.h>
  43 #include <sys/wait.h>
  44 #include <arpa/inet.h>
  45 #include <unistd.h>
  46 #include <gnutls/gnutls.h>
  47 #include <gnutls/dtls.h>
  48 #include <signal.h>
  49
  50 #include "utils.h"
  51
  52 /* This program tests whether the handshake timeout value is enforced.
  53  */
  54
  55 static void server_log_func(int level, const char *str)
  56 {
  57         fprintf(stderr, "server|<%d>| %s", level, str);
  58 }
  59
  60 static void client_log_func(int level, const char *str)
  61 {
  62         fprintf(stderr, "client|<%d>| %s", level, str);
  63 }
  64
  65 /* A very basic TLS client, with anonymous authentication.
  66  */
  67
  68 static void client(int fd, int wait)
  69 {
  70         int ret;
  71         gnutls_anon_client_credentials_t anoncred;
  72         gnutls_session_t session;
  73         /* Need to enable anonymous KX specifically. */
  74
  75         global_init();
  76
  77         if (debug) {
  78                 gnutls_global_set_log_function(client_log_func);
  79                 gnutls_global_set_log_level(4711);
  80         }
  81
  82         gnutls_anon_allocate_client_credentials(&anoncred);
  83
  84         /* Initialize TLS session
  85          */
  86         gnutls_init(&session, GNUTLS_CLIENT);
  87         gnutls_handshake_set_timeout(session, 20 * 1000);
  88
  89         /* Use default priorities */
  90         gnutls_priority_set_direct(session, "NORMAL:+ANON-ECDH", NULL);
  91
  92         /* put the anonymous credentials to the current session
  93          */
  94         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
  95
  96         gnutls_transport_set_int(session, fd);
  97
  98         /* Perform the TLS handshake
  99          */
 100         do {
 101                 ret = gnutls_handshake(session);
 102         }
 103         while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 104
 105         gnutls_deinit(session);
 106         gnutls_anon_free_client_credentials(anoncred);
 107         gnutls_global_deinit();
 108
 109         if (ret < 0) {
 110                 if (ret != GNUTLS_E_TIMEDOUT || wait == 0) {
 111                         if (debug)
 112                                 fail("client: unexpected error: %s\n",
 113                                      gnutls_strerror(ret));
 114                         exit(1);
 115                 }
 116                 if (debug)
 117                         success("client: expected timeout occured\n");
 118                 return;
 119         } else {
 120                 if (wait != 0) {
 121                         fail("client: handshake was completed unexpectedly\n");
 122                         gnutls_perror(ret);
 123                         exit(1);
 124                 }
 125         }
 126
 127         return;
 128 }
 129
 130 static void initialize_tls_session(gnutls_session_t * session)
 131 {
 132         gnutls_init(session, GNUTLS_SERVER);
 133
 134         /* avoid calling all the priority functions, since the defaults
 135          * are adequate.
 136          */
 137         gnutls_priority_set_direct(*session, "NORMAL:+ANON-ECDH", NULL);
 138 }
 139
 140 static void server(int fd, int wait)
 141 {
 142         int ret;
 143         gnutls_session_t session;
 144         gnutls_anon_server_credentials_t anoncred;
 145
 146         /* this must be called once in the program
 147          */
 148         global_init();
 149
 150         if (debug) {
 151                 gnutls_global_set_log_function(server_log_func);
 152                 gnutls_global_set_log_level(4711);
 153         }
 154
 155         gnutls_anon_allocate_server_credentials(&anoncred);
 156
 157         initialize_tls_session(&session);
 158         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
 159
 160         gnutls_transport_set_int(session, fd);
 161
 162         if (wait) {
 163                 sec_sleep(25);
 164         } else {
 165                 do {
 166                         ret = gnutls_handshake(session);
 167                 }
 168                 while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 169
 170                 if (ret == 0)
 171                         gnutls_bye(session, GNUTLS_SHUT_RDWR);
 172         }
 173
 174         gnutls_deinit(session);
 175         gnutls_anon_free_server_credentials(anoncred);
 176         gnutls_global_deinit();
 177 }
 178
 179 static void start(int wait)
 180 {
 181         int fd[2];
 182         int ret;
 183         pid_t child;
 184
 185         if (debug && wait)
 186                 fprintf(stderr, "\nWill test timeout\n");
 187
 188         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
 189         if (ret < 0) {
 190                 perror("socketpair");
 191                 exit(1);
 192         }
 193
 194         child = fork();
 195         if (child < 0) {
 196                 perror("fork");
 197                 fail("fork");
 198                 exit(1);
 199         }
 200
 201         if (child) {
 202                 /* parent */
 203                 close(fd[1]);
 204                 server(fd[0], wait);
 205                 close(fd[0]);
 206         } else {
 207                 close(fd[0]);
 208                 client(fd[1], wait);
 209                 close(fd[1]);
 210                 exit(0);
 211         }
 212 }
 213
 214 static void ch_handler(int sig)
 215 {
 216         int status = 0;
 217         wait(&status);
 218         if (WEXITSTATUS(status) != 0)
 219                 fail("Child died with status %d\n", WEXITSTATUS(status));
 220         return;
 221 }
 222
 223 void doit(void)
 224 {
 225         signal(SIGCHLD, ch_handler);
 226         signal(SIGPIPE, SIG_IGN);
 227
 228         /* make sure that normal handshake occurs */
 229         start(0);
 230
 231         /* check the handshake with an expected timeout */
 232         start(1);
 233 }
 234
 235 #endif                          /* _WIN32 */