+++ /dev/null
-/*
- * Copyright (C) 2012 Free Software Foundation, Inc.
- *
- * Author: Nikos Mavrogiannopoulos
- *
- * This file is part of GnuTLS.
- *
- * GnuTLS is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * GnuTLS is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GnuTLS; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#if defined(_WIN32)
-
-int main()
-{
- exit(77);
-}
-
-#else
-
-#include <string.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <gnutls/gnutls.h>
-#include <gnutls/dtls.h>
-
-#include "utils.h"
-
-/* This program simulates packet loss in DTLS datagrams using
- * the blocking functions. Idea taken from test app of
- * Sean Buckheister.
- */
-
-static void print_type(const unsigned char* buf, int size)
-{
- if (buf[0] == 22 && size >= 13) {
- if (buf[13] == 1)
- fprintf(stderr, "Client Hello\n");
- else if (buf[13] == 2)
- fprintf(stderr, "Server Hello\n");
- else if (buf[13] == 12)
- fprintf(stderr, "Server Key exchange\n");
- else if (buf[13] == 14)
- fprintf(stderr, "Server Hello Done\n");
- else if (buf[13] == 11)
- fprintf(stderr, "Certificate\n");
- else if (buf[13] == 16)
- fprintf(stderr, "Client Key Exchange\n");
- else if (buf[4] == 1)
- fprintf(stderr, "Finished\n");
- else if (buf[13] == 11)
- fprintf(stderr, "Server Hello Done\n");
- else
- fprintf(stderr, "Unknown handshake\n");
- } else if (buf[0] == 20) {
- fprintf(stderr, "Change Cipher Spec\n");
- } else
- fprintf(stderr, "Unknown\n");
-}
-
-static void
-server_log_func (int level, const char *str)
-{
- fprintf (stderr, "server|<%d>| %s", level, str);
-}
-
-static void
-client_log_func (int level, const char *str)
-{
- fprintf (stderr, "client|<%d>| %s", level, str);
-}
-
-/* A very basic TLS client, with anonymous authentication.
- */
-
-#define MAX_BUF 1024
-#define MSG "Hello TLS"
-
-static int counter;
-static int packet_to_lose;
-gnutls_session_t session;
-
-static ssize_t
-push (gnutls_transport_ptr_t tr, const void *data, size_t len)
-{
-int fd = (long int)tr;
-
- counter++;
-
- if (packet_to_lose != -1 && packet_to_lose == counter) {
- if (debug)
- {
- fprintf(stderr, "Discarding packet %d: ", counter);
- print_type(data, len);
- }
- return len;
- }
- return send(fd, data, len, 0);
-}
-
-static void
-client (int fd, int packet)
-{
- int ret, ii;
- char buffer[MAX_BUF + 1];
- gnutls_anon_client_credentials_t anoncred;
- /* Need to enable anonymous KX specifically. */
-
- gnutls_global_init ();
-
- if (debug)
- {
- gnutls_global_set_log_function (client_log_func);
- gnutls_global_set_log_level (4711);
- }
-
- gnutls_anon_allocate_client_credentials (&anoncred);
-
- /* Initialize TLS session
- */
- gnutls_init (&session, GNUTLS_CLIENT|GNUTLS_DATAGRAM);
- gnutls_dtls_set_mtu( session, 1500);
-
- /* Use default priorities */
- gnutls_priority_set_direct (session, "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL", NULL);
-
- /* put the anonymous credentials to the current session
- */
- gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
-
- counter = 0;
- packet_to_lose = packet;
-
- gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) fd);
- gnutls_transport_set_push_function (session, push);
-
- /* Perform the TLS handshake
- */
- do
- {
- ret = gnutls_handshake (session);
- }
- while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
-
- if (ret < 0)
- {
- fail ("client: Handshake failed\n");
- gnutls_perror (ret);
- exit(1);
- }
- else
- {
- if (debug)
- success ("client: Handshake was completed\n");
- }
-
- if (debug)
- success ("client: TLS version is: %s\n",
- gnutls_protocol_get_name (gnutls_protocol_get_version
- (session)));
-
- do {
- ret = gnutls_record_send (session, MSG, strlen (MSG));
- } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
-
- do {
- ret = gnutls_record_recv (session, buffer, MAX_BUF);
- } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
-
- if (ret == 0)
- {
- if (debug)
- success ("client: Peer has closed the TLS connection\n");
- goto end;
- }
- else if (ret < 0)
- {
- fail ("client: Error: %s\n", gnutls_strerror (ret));
- exit(1);
- }
-
- if (debug)
- {
- printf ("- Received %d bytes: ", ret);
- for (ii = 0; ii < ret; ii++)
- {
- fputc (buffer[ii], stdout);
- }
- fputs ("\n", stdout);
- }
-
- gnutls_bye (session, GNUTLS_SHUT_RDWR);
-
-end:
-
- close (fd);
-
- gnutls_deinit (session);
-
- gnutls_anon_free_client_credentials (anoncred);
-
- gnutls_global_deinit ();
-}
-
-
-/* These are global */
-gnutls_anon_server_credentials_t anoncred;
-pid_t child;
-
-static gnutls_session_t
-initialize_tls_session (void)
-{
- gnutls_session_t session;
-
- gnutls_init (&session, GNUTLS_SERVER|GNUTLS_DATAGRAM);
- gnutls_dtls_set_mtu( session, 1500);
-
- /* avoid calling all the priority functions, since the defaults
- * are adequate.
- */
- gnutls_priority_set_direct (session, "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL", NULL);
-
- gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
-
- return session;
-}
-
-static void terminate(void)
-{
-int status;
-
- kill(child, SIGTERM);
- wait(&status);
- exit(1);
-}
-
-static void
-server (int fd, int packet)
-{
-int ret;
-char buffer[MAX_BUF + 1];
- /* this must be called once in the program
- */
- gnutls_global_init ();
-
- if (debug)
- {
- gnutls_global_set_log_function (server_log_func);
- gnutls_global_set_log_level (4711);
- }
-
- gnutls_anon_allocate_server_credentials (&anoncred);
-
- session = initialize_tls_session ();
-
- counter = 0;
- packet_to_lose = packet;
-
- gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) fd);
- gnutls_transport_set_push_function (session, push);
-
- do
- {
- ret = gnutls_handshake (session);
- }
- while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
- if (ret < 0)
- {
- close (fd);
- gnutls_deinit (session);
- fail ("server: Handshake has failed (%s)\n\n", gnutls_strerror (ret));
- terminate();
- }
- if (debug)
- success ("server: Handshake was completed\n");
-
- if (debug)
- success ("server: TLS version is: %s\n",
- gnutls_protocol_get_name (gnutls_protocol_get_version
- (session)));
-
- /* see the Getting peer's information example */
- /* print_info(session); */
-
- for (;;)
- {
- memset (buffer, 0, MAX_BUF + 1);
-
- do {
- ret = gnutls_record_recv (session, buffer, MAX_BUF);
- } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
-
- if (ret == 0)
- {
- if (debug)
- success ("server: Peer has closed the GnuTLS connection\n");
- break;
- }
- else if (ret < 0)
- {
- fail ("server: Received corrupted data(%d). Closing...\n", ret);
- terminate();
- }
- else if (ret > 0)
- {
- /* echo data back to the client
- */
- do {
- ret = gnutls_record_send (session, buffer, strlen (buffer));
- } while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
- }
- }
- /* do not wait for the peer to close the connection.
- */
- gnutls_bye (session, GNUTLS_SHUT_WR);
-
- close (fd);
- gnutls_deinit (session);
-
- gnutls_anon_free_server_credentials (anoncred);
-
- gnutls_global_deinit ();
-
- if (debug)
- success ("server: finished\n");
-}
-
-static void start (int server_packet, int client_packet)
-{
- int fd[2];
- int ret;
-
- if (debug)
- fprintf(stderr, "\nWill discard %s packet %d\n",
- (client_packet!=-1)?"client":"server", (client_packet!=-1)?client_packet:server_packet);
-
- ret = socketpair(AF_LOCAL, SOCK_DGRAM, 0, fd);
- if (ret < 0)
- {
- perror("socketpair");
- exit(1);
- }
-
- child = fork ();
- if (child < 0)
- {
- perror ("fork");
- fail ("fork");
- exit(1);
- }
-
- if (child)
- {
- int status;
- /* parent */
- server (fd[0], server_packet);
- wait (&status);
- if (WEXITSTATUS(status) != 0)
- fail("Child died with status %d\n", WEXITSTATUS(status));
- }
- else
- {
- client (fd[1], client_packet);
- exit(0);
- }
-}
-
-void
-doit (void)
-{
- start(-1, 1);
- start(-1, 2);
- start(-1, 3);
- start(-1, 4);
-
- start(1, -1);
- start(2, -1);
- start(3, -1);
- start(4, -1);
- start(5, -1);
-}
-
-#endif /* _WIN32 */
projects / thirdparty / gnutls.git / commitdiff
