strongswan/scripts/hash_burn.c

/*
 * Copyright (C) 2012 Martin Willi
 * Copyright (C) 2012 revosec AG
 *
 * This program 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 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program 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.
 */

#include <stdio.h>
#include <library.h>



int main(int argc, char *argv[])
{
	hash_algorithm_t alg;
	hasher_t *hasher;
	char buffer[1024];
	int limit = 0, i = 0;

	library_init(NULL, "hash_burn");
	lib->plugins->load(lib->plugins, PLUGINS);
	atexit(library_deinit);

	printf("loaded: %s\n", PLUGINS);

	memset(buffer, 0x12, sizeof(buffer));

	if (argc < 2)
	{
		fprintf(stderr, "usage: %s <algorithm>!\n", argv[0]);
		return 1;
	}
	if (argc > 2)
	{
		limit = atoi(argv[2]);
	}

	if (!enum_from_name(hash_algorithm_short_names, argv[1], &alg))
	{
		fprintf(stderr, "unknown hash algorithm: %s\n", argv[1]);
		return 1;
	}
	hasher = lib->crypto->create_hasher(lib->crypto, alg);
	if (!hasher)
	{
		fprintf(stderr, "hash algorithm not supported: %N\n",
				hash_algorithm_names, alg);
		return 1;
	}

	while (TRUE)
	{
		if (!hasher->get_hash(hasher, chunk_from_thing(buffer), buffer))
		{
			fprintf(stderr, "hashing failed!\n");
			return 1;
		}
		if (limit && ++i == limit)
		{
			break;
		}
	}
	hasher->destroy(hasher);
	return 0;
}