/*

 * Copyright (C) 2009-2012 Free Software Foundation, Inc.

 *

 * Author: Simon Josefsson

 *

 * 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

/*

 * Small code to reproduce the CVE-2009-1416 bad DSA key problem.

 *

 * Build it using:

 *

 *  gcc -o cve-2009-1416 cve-2009-1416.c -lgnutls

 *

 * If your gnutls library is OK then running it will print 'success!'.

 *

 * If your gnutls library is buggy then running it will print 'buggy'.

 *

 */

#include <stdio.h>

#include <stdarg.h>

#include <stdlib.h>

#include <string.h>

#include <utils.h>

#include <gnutls/gnutls.h>

#include <gnutls/x509.h>

int main(void)

{

	gnutls_x509_privkey_t key;

	gnutls_datum_t p, q, g, y, x;

	int ret;

	if (gnutls_fips140_mode_enabled()) {

		/* Cannot generate a 512-bit DSA key */

		return 77;

	}

	global_init();

	ret = gnutls_x509_privkey_init(&key);

	if (ret < 0)

		return 1;

	ret = gnutls_x509_privkey_generate(key, GNUTLS_PK_DSA, 512, 0);

	if (ret < 0)

		return 1;

	ret = gnutls_x509_privkey_export_dsa_raw(key, &p, &q, &g, &y, &x);

	if (ret < 0)

		return 1;

	if (q.size == 3 && memcmp(q.data, "\x01\x00\x01", 3) == 0) {

		printf("buggy\n");

		return 1;

	}

	gnutls_free(p.data);

	gnutls_free(q.data);

	gnutls_free(g.data);

	gnutls_free(y.data);

	gnutls_free(x.data);

	gnutls_x509_privkey_deinit(key);

	gnutls_global_deinit();

	return 0;

}