/*
* Copyright (C) 2016 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 "cert-common.h"
#include "utils.h"
/* This program tests that the server does not send the
* status request extension if no status response exists. That
* is to provide compatibility with gnutls 3.3.x which requires
* that behavior.
*/
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 SKIP16(pos, total) { \
uint16_t _s; \
if (pos+2 > total) fail("error\n"); \
_s = (msg->data[pos] << 8) | msg->data[pos+1]; \
if ((size_t)(pos+2+_s) > total) fail("error\n"); \
pos += 2+_s; \
}
#define SKIP8(pos, total) { \
uint8_t _s; \
if (pos+1 > total) fail("error\n"); \
_s = msg->data[pos]; \
if ((size_t)(pos+1+_s) > total) fail("error\n"); \
pos += 1+_s; \
}
#define TLS_EXT_STATUS_REQUEST 5
#define HANDSHAKE_SESSION_ID_POS 34
/* This returns either the application-specific ID extension contents,
* or the session ID contents. The former is used on the new protocol,
* while the latter on the legacy protocol.
*
* Extension ID: 48018
* opaque ApplicationID<1..2^8-1>;
*
* struct {
* ExtensionType extension_type;
* opaque extension_data<0..2^16-1>;
* } Extension;
*
* struct {
* ProtocolVersion server_version;
* Random random;
* SessionID session_id;
* CipherSuite cipher_suite;
* CompressionMethod compression_method;
* Extension server_hello_extension_list<0..2^16-1>;
* } ServerHello;
*/
static int handshake_callback(gnutls_session_t session, unsigned int htype,
unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
{
size_t pos = 0;
/* A client hello packet. We can get the session ID and figure
* the associated connection. */
if (msg->size < HANDSHAKE_SESSION_ID_POS+GNUTLS_MAX_SESSION_ID+2) {
fail("invalid client hello\n");
}
/* try to read the extension data */
pos = HANDSHAKE_SESSION_ID_POS;
/* session id */
SKIP8(pos, msg->size);
/* CipherSuite */
pos+=2;
/* CompressionMethod */
SKIP8(pos, msg->size);
if (pos+2 > msg->size)
fail("invalid client hello\n");
pos+=2;
/* Extension(s) */
while (pos < msg->size) {
uint16_t type;
if (pos+4 > msg->size)
fail("invalid client hello\n");
type = (msg->data[pos] << 8) | msg->data[pos+1];
pos+=2;
if (type != TLS_EXT_STATUS_REQUEST) {
SKIP16(pos, msg->size);
} else { /* found */
fail("found extension, although no status response\n");
break;
}
}
return 0;
}
#define MAX_BUF 1024
static void client(int fd, const char *prio)
{
int ret;
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
/* Need to enable anonymous KX specifically. */
global_init();
if (debug) {
gnutls_global_set_log_function(client_log_func);
gnutls_global_set_log_level(7);
}
gnutls_certificate_allocate_credentials(&x509_cred);
/* Initialize TLS session
*/
gnutls_init(&session, GNUTLS_CLIENT);
/* Use default priorities */
gnutls_priority_set_direct(session, prio, NULL);
/* put the anonymous credentials to the current session
*/
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 == GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM) {
/* success */
goto end;
}
if (ret < 0) {
fail("client: Handshake failed: %s\n", gnutls_strerror(ret));
} 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)));
gnutls_bye(session, GNUTLS_SHUT_WR);
end:
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
}
static void server(int fd, const char *prio)
{
int ret;
char buffer[MAX_BUF + 1];
gnutls_session_t session;
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(4711);
}
gnutls_certificate_allocate_credentials(&x509_cred);
gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
&server_key,
GNUTLS_X509_FMT_PEM);
gnutls_init(&session, GNUTLS_SERVER);
gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_SERVER_HELLO,
GNUTLS_HOOK_POST,
handshake_callback);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
gnutls_priority_set_direct(session, prio, NULL);
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) {
/* failure is expected here */
goto end;
}
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 not wait for the peer to close the connection.
*/
gnutls_bye(session, GNUTLS_SHUT_WR);
end:
close(fd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
static void ch_handler(int sig)
{
return;
}
static void start(const char *name, const char *prio)
{
pid_t child;
int fd[2];
int ret, status = 0;
signal(SIGCHLD, ch_handler);
signal(SIGPIPE, SIG_IGN);
success("running: %s\n", name);
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], prio);
waitpid(child, &status, 0);
check_wait_status(status);
} else {
close(fd[0]);
client(fd[1], prio);
exit(0);
}
}
void doit(void)
{
start("tls1.2", "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.2");
start("tls1.3", "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3");
start("default", "NORMAL");
}
#endif /* _WIN32 */