tests/no-signal.c

   1 /*
   2  * Copyright (C) 2015 Nikos Mavrogiannopoulos
   3  *
   4  * This file is part of GnuTLS.
   5  *
   6  * GnuTLS is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuTLS is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GnuTLS; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #if defined(_WIN32)
  30
  31 int main()
  32 {
  33         exit(77);
  34 }
  35
  36 #else
  37
  38 # include <sys/types.h>
  39 # include <netinet/in.h>
  40 # include <sys/socket.h>
  41 # include <sys/wait.h>
  42 # include <arpa/inet.h>
  43 # include <unistd.h>
  44 # include <gnutls/gnutls.h>
  45 # include <gnutls/dtls.h>
  46 # include <signal.h>
  47
  48 # ifndef MSG_NOSIGNAL
  49
  50 int main()
  51 {
  52         exit(77);
  53 }
  54
  55 # else
  56
  57 # include "utils.h"
  58
  59 static
  60 void sigpipe(int sig)
  61 {
  62         fail("sigpipe received\n");
  63         exit(1);
  64 }
  65
  66 #define BUF_SIZE 64
  67
  68 static void client(int fd)
  69 {
  70         int ret;
  71         gnutls_anon_client_credentials_t anoncred;
  72         gnutls_session_t session;
  73         char buf[BUF_SIZE];
  74         char buf2[BUF_SIZE];
  75         /* Need to enable anonymous KX specifically. */
  76
  77         global_init();
  78
  79         if (debug) {
  80                 gnutls_global_set_log_level(4711);
  81         }
  82
  83         gnutls_anon_allocate_client_credentials(&anoncred);
  84
  85         /* Initialize TLS session
  86          */
  87         gnutls_init(&session, GNUTLS_CLIENT);
  88         gnutls_handshake_set_timeout(session, 20 * 1000);
  89
  90         /* Use default priorities */
  91         gnutls_priority_set_direct(session,
  92                                    "NONE:+VERS-TLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
  93                                    NULL);
  94
  95         /* put the anonymous credentials to the current session
  96          */
  97         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
  98
  99         gnutls_transport_set_int(session, fd);
 100
 101         /* Perform the TLS handshake
 102          */
 103         do {
 104                 ret = gnutls_handshake(session);
 105         }
 106         while (ret < 0 && (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED));
 107
 108         ret = gnutls_record_recv(session, buf, sizeof(buf));
 109         if (ret < 0 || ret != sizeof(buf)) {
 110                 kill(getppid(), SIGPIPE);
 111                 fail("client: recv failed");
 112         }
 113         if (debug)
 114                 success("client: received %d bytes\n", ret);
 115
 116         memset(buf2, 0, sizeof(buf));
 117         if (memcmp(buf, buf2, sizeof(buf)) != 0) {
 118                 kill(getppid(), SIGPIPE);
 119                 fail("client: recv data failed");
 120         }
 121
 122         close(fd);
 123         gnutls_deinit(session);
 124         gnutls_anon_free_client_credentials(anoncred);
 125         gnutls_global_deinit();
 126
 127         if (ret < 0) {
 128                 fail("client: Handshake failed with unexpected reason: %s\n", gnutls_strerror(ret));
 129         } else {
 130                 if (debug)
 131                         success("client: Handshake was completed\n");
 132         }
 133 }
 134
 135
 136 /* These are global */
 137 pid_t child;
 138
 139 static void server(int fd)
 140 {
 141         gnutls_anon_server_credentials_t anoncred;
 142         gnutls_session_t session;
 143         int ret;
 144         char buf[BUF_SIZE];
 145         unsigned i;
 146         /* this must be called once in the program
 147          */
 148         global_init();
 149
 150         if (debug) {
 151                 gnutls_global_set_log_level(4711);
 152         }
 153
 154         gnutls_anon_allocate_server_credentials(&anoncred);
 155
 156         gnutls_init(&session, GNUTLS_SERVER|GNUTLS_NO_SIGNAL);
 157
 158         /* avoid calling all the priority functions, since the defaults
 159          * are adequate.
 160          */
 161         gnutls_priority_set_direct(session,
 162                                    "NONE:+VERS-TLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
 163                                    NULL);
 164
 165         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
 166
 167         gnutls_transport_set_int(session, fd);
 168
 169         do {
 170                 ret = gnutls_handshake(session);
 171         }
 172         while (ret < 0 && (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED));
 173
 174         if (ret < 0) {
 175                 fail("error in handshake: %s\n", gnutls_strerror(ret));
 176                 exit(1);
 177         }
 178
 179         memset(buf, 0, sizeof(buf));
 180         for (i=0;i<5;i++) {
 181                 sleep(3);
 182                 ret = gnutls_record_send(session, buf, sizeof(buf));
 183                 if (ret < 0)
 184                         break;
 185         }
 186
 187         sleep(3);
 188
 189         gnutls_deinit(session);
 190         gnutls_anon_free_server_credentials(anoncred);
 191         gnutls_global_deinit();
 192
 193 }
 194
 195 static void start(void)
 196 {
 197         int fd[2];
 198         int ret;
 199
 200         /* we need dgram in this test */
 201         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
 202         if (ret < 0) {
 203                 perror("socketpair");
 204                 exit(1);
 205         }
 206
 207         child = fork();
 208         if (child < 0) {
 209                 perror("fork");
 210                 fail("fork");
 211                 exit(1);
 212         }
 213
 214         if (child) {
 215                 /* parent */
 216                 close(fd[0]);
 217                 server(fd[1]);
 218                 close(fd[1]);
 219                 kill(child, SIGTERM);
 220         } else {
 221                 close(fd[1]);
 222                 client(fd[0]);
 223                 close(fd[0]);
 224                 exit(0);
 225         }
 226 }
 227
 228 static void ch_handler(int sig)
 229 {
 230         int status = 0;
 231         wait(&status);
 232         if (WEXITSTATUS(status) != 0)
 233                 fail("Child died with status %d\n", WEXITSTATUS(status));
 234         return;
 235 }
 236
 237 void doit(void)
 238 {
 239         signal(SIGCHLD, ch_handler);
 240         signal(SIGPIPE, sigpipe);
 241
 242         start();
 243 }
 244
 245 # endif /* MSG_NOSIGNAL */
 246 #endif                          /* _WIN32 */