/*
* Copyright (C) 2013 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) || !defined(ENABLE_ALPN)
int main(int argc, char **argv)
{
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"
static void terminate(void);
/* This program tests whether the gnutls_record_get_state() works as
* expected.
*/
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);
}
/* These are global */
static pid_t child;
/* A very basic DTLS client, with anonymous authentication, that negotiates SRTP
*/
static void dump(const char *name, uint8_t *data, unsigned data_size)
{
unsigned i;
fprintf(stderr, "%s", name);
for (i=0;i<data_size;i++)
fprintf(stderr, "%.2x", (unsigned)data[i]);
fprintf(stderr, "\n");
}
static void terminate(void)
{
int status = 0;
kill(child, SIGTERM);
wait(&status);
exit(1);
}
static void client(int fd)
{
gnutls_session_t session;
int ret;
gnutls_anon_client_credentials_t anoncred;
gnutls_datum_t mac_key, iv, cipher_key;
gnutls_datum_t read_mac_key, read_iv, read_cipher_key;
unsigned char rseq_number[8];
unsigned char wseq_number[8];
unsigned char key_material[512], *p;
unsigned i;
unsigned block_size, hash_size, key_size, iv_size;
const char *err;
/* Need to enable anonymous KX specifically. */
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);
/* Use default priorities */
ret = gnutls_priority_set_direct(session,
"NONE:+VERS-TLS1.0:+AES-128-CBC:+SHA1:+SIGN-ALL:+COMP-NULL:+ANON-DH:+ANON-ECDH:+CURVE-ALL",
&err);
if (ret < 0) {
fail("client: priority set failed (%s): %s\n",
gnutls_strerror(ret), err);
exit(1);
}
/* put the anonymous credentials to the current session
*/
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
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: %s\n", strerror(ret));
terminate();
} 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)));
ret = gnutls_cipher_get(session);
if (ret != GNUTLS_CIPHER_AES_128_CBC) {
fprintf(stderr, "negotiated unexpected cipher: %s\n", gnutls_cipher_get_name(ret));
terminate();
}
ret = gnutls_mac_get(session);
if (ret != GNUTLS_MAC_SHA1) {
fprintf(stderr, "negotiated unexpected mac: %s\n", gnutls_mac_get_name(ret));
terminate();
}
iv_size = 16;
hash_size = 20;
key_size = 16;
block_size = 2*hash_size + 2*key_size + 2 *iv_size;
ret = gnutls_prf(session, 13, "key expansion", 1, 0, NULL, block_size,
(void*)key_material);
if (ret < 0) {
fprintf(stderr, "error in %d\n", __LINE__);
gnutls_perror(ret);
terminate();
}
p = key_material;
/* check whether the key material matches our calculations */
ret = gnutls_record_get_state(session, 0, &mac_key, &iv, &cipher_key, wseq_number);
if (ret < 0) {
fprintf(stderr, "error in %d\n", __LINE__);
gnutls_perror(ret);
terminate();
}
if (memcmp(wseq_number, "\x00\x00\x00\x00\x00\x00\x00\x01", 8) != 0) {
dump("wseq:", wseq_number, 8);
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
ret = gnutls_record_get_state(session, 1, &read_mac_key, &read_iv, &read_cipher_key, rseq_number);
if (ret < 0) {
fprintf(stderr, "error in %d\n", __LINE__);
gnutls_perror(ret);
terminate();
}
if (memcmp(rseq_number, "\x00\x00\x00\x00\x00\x00\x00\x01", 8) != 0) {
dump("rseq:", rseq_number, 8);
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
if (hash_size != mac_key.size || memcmp(p, mac_key.data, hash_size) != 0) {
dump("MAC:", mac_key.data, mac_key.size);
dump("Block:", key_material, block_size);
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
p+= hash_size;
if (hash_size != read_mac_key.size || memcmp(p, read_mac_key.data, hash_size) != 0) {
dump("MAC:", read_mac_key.data, read_mac_key.size);
dump("Block:", key_material, block_size);
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
p+= hash_size;
if (key_size != cipher_key.size || memcmp(p, cipher_key.data, key_size) != 0) {
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
p+= key_size;
if (key_size != read_cipher_key.size || memcmp(p, read_cipher_key.data, key_size) != 0) {
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
p+= key_size;
if (iv_size != iv.size || memcmp(p, iv.data, iv_size) != 0) {
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
p+=iv_size;
if (iv_size != read_iv.size || memcmp(p, read_iv.data, iv_size) != 0) {
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
/* check sequence numbers */
for (i=0;i<5;i++) {
ret = gnutls_record_send(session, "hello", 5);
if (ret < 0) {
fail("gnutls_record_send: %s\n", gnutls_strerror(ret));
}
}
ret = gnutls_record_get_state(session, 0, NULL, NULL, NULL, wseq_number);
if (ret < 0) {
fprintf(stderr, "error in %d\n", __LINE__);
gnutls_perror(ret);
terminate();
}
if (memcmp(wseq_number, "\x00\x00\x00\x00\x00\x00\x00\x06", 8) != 0) {
dump("wseq:", wseq_number, 8);
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
ret = gnutls_record_get_state(session, 1, NULL, NULL, NULL, rseq_number);
if (ret < 0) {
fprintf(stderr, "error in %d\n", __LINE__);
gnutls_perror(ret);
terminate();
}
if (memcmp(rseq_number, "\x00\x00\x00\x00\x00\x00\x00\x01", 8) != 0) {
dump("wseq:", wseq_number, 8);
fprintf(stderr, "error in %d\n", __LINE__);
terminate();
}
gnutls_bye(session, GNUTLS_SHUT_WR);
close(fd);
gnutls_deinit(session);
gnutls_anon_free_client_credentials(anoncred);
gnutls_global_deinit();
}
static void server(int fd)
{
int ret;
gnutls_session_t session;
gnutls_anon_server_credentials_t anoncred;
gnutls_dh_params_t dh_params;
char buf[128];
const gnutls_datum_t p3 =
{ (unsigned char *) pkcs3, strlen(pkcs3) };
/* this must be called once in the program
*/
global_init();
if (debug) {
gnutls_global_set_log_function(server_log_func);
gnutls_global_set_log_level(4711);
}
gnutls_anon_allocate_server_credentials(&anoncred);
gnutls_dh_params_init(&dh_params);
gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);
gnutls_anon_set_server_dh_params(anoncred, dh_params);
gnutls_init(&session, GNUTLS_SERVER);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
ret = gnutls_priority_set_direct(session,
"NORMAL:+ANON-DH:+ANON-ECDH:-VERS-ALL:+VERS-TLS1.0", NULL);
if (ret < 0) {
fail("server: priority set failed (%s)\n\n",
gnutls_strerror(ret));
terminate();
}
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
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)));
do {
ret = gnutls_record_recv(session, buf, sizeof(buf));
} while(ret > 0);
if (ret < 0) {
fail("error: %s\n", gnutls_strerror(ret));
}
/* 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_dh_params_deinit(dh_params);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
static void start(void)
{
int fd[2];
int ret;
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) {
int status;
/* parent */
server(fd[0]);
wait(&status);
check_wait_status(status);
} else {
close(fd[0]);
client(fd[1]);
exit(0);
}
}
void doit(void)
{
start();
}
#endif /* _WIN32 */