/*
* Copyright (C) 2014 Nikos Mavrogiannopoulos
*
* 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 <signal.h>
#include "utils.h"
#include "cert-common.h"
static void terminate(void);
/* This program tests client and server initiated rehandshake
* behavior when they are refused by the peer.
*/
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);
}
#define MAX_BUF 1024
static void client(int fd, unsigned test)
{
int ret;
char buffer[MAX_BUF + 1];
gnutls_anon_client_credentials_t anoncred;
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
/* Need to enable anonymous KX specifically. */
global_init();
memset(buffer, 2, sizeof(buffer));
if (debug) {
gnutls_global_set_log_function(client_log_func);
gnutls_global_set_log_level(3);
}
gnutls_anon_allocate_client_credentials(&anoncred);
gnutls_certificate_allocate_credentials(&x509_cred);
/* Initialize TLS session
*/
gnutls_init(&session, GNUTLS_CLIENT);
gnutls_handshake_set_timeout(session, 20 * 1000);
/* Use default priorities */
gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.1:+VERS-TLS1.2", NULL);
/* put the anonymous credentials to the current session
*/
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_transport_set_int(session, fd);
/* 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)));
if (debug)
success("client: test %d\n", test);
if (test != 0) {
ret = gnutls_handshake(session);
if (ret != GNUTLS_E_GOT_APPLICATION_DATA) {
fail("client: error in code after rehandshake: %s\n",
gnutls_strerror(ret));
exit(1);
}
do {
do {
ret =
gnutls_record_recv(session, buffer,
MAX_BUF);
} while (ret == GNUTLS_E_AGAIN
|| ret == GNUTLS_E_INTERRUPTED);
} while (ret > 0);
} else {
do {
do {
ret =
gnutls_record_recv(session, buffer,
MAX_BUF);
} while (ret == GNUTLS_E_AGAIN
|| ret == GNUTLS_E_INTERRUPTED);
} while (ret > 0);
if (ret != GNUTLS_E_REHANDSHAKE) {
fail("client: Error receiving rehandshake: %s\n",
gnutls_strerror(ret));
exit(1);
}
do {
ret =
gnutls_record_send(session, buffer, sizeof(buffer));
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0) {
fail("Error sending %d byte packet: %s\n",
(int)sizeof(buffer), gnutls_strerror(ret));
exit(1);
}
do {
ret =
gnutls_record_send(session, buffer, sizeof(buffer));
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0) {
fail("Error sending %d byte packet: %s\n",
(int)sizeof(buffer), gnutls_strerror(ret));
exit(1);
}
}
gnutls_bye(session, GNUTLS_SHUT_WR);
close(fd);
gnutls_deinit(session);
gnutls_anon_free_client_credentials(anoncred);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
}
/* These are global */
pid_t child;
static void terminate(void)
{
kill(child, SIGTERM);
exit(1);
}
static void server(int fd, unsigned test)
{
int ret;
char buffer[MAX_BUF + 1];
gnutls_session_t session;
gnutls_anon_server_credentials_t anoncred;
gnutls_certificate_credentials_t x509_cred;
/* this must be called once in the program
*/
global_init();
memset(buffer, 0, sizeof(buffer));
if (debug) {
gnutls_global_set_log_function(server_log_func);
gnutls_global_set_log_level(3);
}
gnutls_certificate_allocate_credentials(&x509_cred);
gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
&server_key, GNUTLS_X509_FMT_PEM);
gnutls_anon_allocate_server_credentials(&anoncred);
gnutls_init(&session, GNUTLS_SERVER);
gnutls_handshake_set_timeout(session, 20 * 1000);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.1:+VERS-TLS1.2", NULL);
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_transport_set_int(session, fd);
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)));
if (debug)
success("server: test %d\n", test);
if (test != 0) {
do {
do {
ret =
gnutls_record_recv(session, buffer,
MAX_BUF);
} while (ret == GNUTLS_E_AGAIN
|| ret == GNUTLS_E_INTERRUPTED);
} while (ret > 0);
if (ret != GNUTLS_E_REHANDSHAKE) {
fail("server: Error receiving client handshake request: %s\n", gnutls_strerror(ret));
terminate();
}
do {
ret =
gnutls_record_send(session, buffer, sizeof(buffer));
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
if (ret < 0) {
fail("Error sending %d byte packet: %s\n",
(int)sizeof(buffer), gnutls_strerror(ret));
terminate();
}
} else {
if (debug)
success("server: sending rehandshake request\n");
ret = gnutls_rehandshake(session);
if (ret < 0) {
fail("Error sending %d byte packet: %s\n",
(int)sizeof(buffer), gnutls_strerror(ret));
terminate();
}
if (debug)
success("server: starting handshake\n");
ret = gnutls_handshake(session);
if (ret != GNUTLS_E_GOT_APPLICATION_DATA) {
fail("server: didn't receive GNUTLS_E_GOT_APPLICATION_DATA: %s\n", gnutls_strerror(ret));
terminate();
}
if (debug)
success("server: got application data error code: %s\n",
gnutls_strerror(ret));
do {
do {
ret =
gnutls_record_recv(session, buffer,
MAX_BUF);
} while (ret == GNUTLS_E_AGAIN
|| ret == GNUTLS_E_INTERRUPTED);
} while (ret > 0);
if (debug)
success("server: final ret: %s\n",
gnutls_strerror(ret));
if (ret < 0) {
fail("Error receiving final packet: %s\n",
gnutls_strerror(ret));
terminate();
}
}
/* 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_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
static void start(unsigned test)
{
int fd[2];
int ret;
int status = 0;
ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
if (ret < 0) {
perror("socketpair");
exit(1);
}
child = fork();
if (child < 0) {
perror("fork");
fail("fork");
exit(1);
}
if (child) {
/* parent */
close(fd[1]);
server(fd[0], test);
wait(&status);
check_wait_status(status);
} else {
close(fd[0]);
client(fd[1], test);
exit(0);
}
}
static void ch_handler(int sig)
{
return;
}
void doit(void)
{
signal(SIGCHLD, ch_handler);
signal(SIGPIPE, SIG_IGN);
start(0);
start(1);
}
#endif /* _WIN32 */