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/*
* Copyright (C) 2016 Red Hat, 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, see <https://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
/* In this test we check the parsing of SSL 2.0 client hellos under
* the default protocols.
* As we can only read but not generate we use a fixed hello message
* followed by an alert. That way we detect whether the handshake
* completed hello parsing and reached the alert message.
*/
#if defined(_WIN32) || !defined(ENABLE_SSL2)
/* socketpair isn't supported on Win32. */
int main(int argc, char **argv)
{
exit(77);
}
#else
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#if !defined(_WIN32)
#include <sys/wait.h>
#endif
#include <unistd.h>
#include <gnutls/gnutls.h>
#include "utils.h"
#include "cert-common.h"
pid_t child;
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s |<%d>| %s", child ? "server" : "client", level,
str);
}
/* A very basic TLS client, with anonymous authentication.
*/
static unsigned char ssl2_hello[] =
"\x80\x59\x01\x03\x01\x00\x30\x00\x00\x00\x20\x00\x00\x39\x00\x00"
"\x38\x00\x00\x35\x00\x00\x16\x00\x00\x13\x00\x00\x0a\x00\x00\x33"
"\x00\x00\x32\x00\x00\x2f\x00\x00\x07\x00\x00\x05\x00\x00\x04\x00"
"\x00\x15\x00\x00\x12\x00\x00\x09\x00\x00\xff\xb1\xc9\x95\x1a\x02"
"\x6c\xd6\x42\x11\x6e\x99\xe2\x84\x97\xc9\x17\x53\xaf\x53\xf7\xfc"
"\x8d\x1e\x72\x87\x18\x53\xee\xa6\x7d\x18\xc6";
static unsigned char tls_alert[] = "\x15\x03\x01\x00\x02\x02\x5A";
static void client(int sd)
{
char buf[1024];
int ret;
/* send an SSL 2.0 hello, and then an alert */
ret = send(sd, ssl2_hello, sizeof(ssl2_hello) - 1, 0);
if (ret < 0)
fail("error sending hello\n");
ret = recv(sd, buf, sizeof(buf), 0);
if (ret < 0)
fail("error receiving hello\n");
ret = send(sd, tls_alert, sizeof(tls_alert) - 1, 0);
if (ret < 0)
fail("error sending hello\n");
close(sd);
}
static void server(int sd)
{
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
int ret;
/* this must be called once in the program
*/
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(6);
gnutls_certificate_allocate_credentials(&x509_cred);
gnutls_certificate_set_x509_trust_mem(x509_cred, &ca3_cert,
GNUTLS_X509_FMT_PEM);
gnutls_certificate_set_x509_key_mem(x509_cred,
&server_ca3_localhost_cert,
&server_ca3_key,
GNUTLS_X509_FMT_PEM);
if (debug)
success("Launched, generating DH parameters...\n");
gnutls_init(&session, GNUTLS_SERVER);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
gnutls_priority_set_direct(session, "NORMAL", NULL);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_transport_set_int(session, sd);
ret = gnutls_handshake(session);
if (ret != GNUTLS_E_FATAL_ALERT_RECEIVED ||
gnutls_alert_get(session) != GNUTLS_A_USER_CANCELED) {
fail("server: Handshake failed unexpectedly (%s)\n\n",
gnutls_strerror(ret));
return;
}
if (debug) {
success("server: Handshake parsed the SSL2.0 client hello\n");
}
close(sd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
void doit(void)
{
int sockets[2];
int err;
err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
if (err == -1) {
perror("socketpair");
fail("socketpair failed\n");
return;
}
child = fork();
if (child < 0) {
perror("fork");
fail("fork");
return;
}
if (child) {
int status;
close(sockets[1]);
server(sockets[0]);
wait(&status);
check_wait_status(status);
} else {
close(sockets[0]);
client(sockets[1]);
exit(0);
}
}
#endif /* _WIN32 */
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