Commit 3a9047ac authored by Niels Möller's avatar Niels Möller

* Added twofish implementation.

Rev: src/nettle/twofish.c:1.1
Rev: src/nettle/twofish.h:1.1
parent 71247108
/* twofish.c
*
* $Id$
* The twofish block cipher.
*/
/* twofish - An implementation of the twofish cipher.
* Copyright (C) 1999 Ruud de Rooij <ruud@debian.org>
*
* Modifications for lsh, integrated testing
* Copyright (C) 1999 J.H.M. Dassen (Ray) <jdassen@wi.LeidenUniv.nl>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* Integrated with the nettle library,
* Copyright (C) 2001 Niels Mller
*/
/* ------------------------------------------------------------------------- */
#include "twofish.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
static char cvs_id[] UNUSED =
"$Id$";
/* ------------------------------------------------------------------------- */
/* Type definitions for byte and word. word refers to a 32-bit unsigned
* value.
/* nettle, low-level cryptographics library
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The GNU MP Library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the GNU MP Library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
typedef UINT8 byte;
typedef UINT32 word;
#include "twofish.h"
/* Bitwise rotations on 32-bit words. These are defined as macros that
* evaluate their argument twice, so do not apply to any expressions with
......
/* twofish.h
*
* The twofish block cipher.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001 Niels Mller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the GNU MP Library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
/*
* Twofish is a 128-bit block cipher that accepts a variable-length
* key up to 256 bits, designed by Bruce Schneier and others. See
* http://www.counterpane.com/twofish.html for details.
*/
#ifndef NETTLE_TWOFISH_H_INCLUDED
#define NETTLE_TWOFISH_H_INCLUDED
#include <stdint.h>
#define TWOFISH_BLOCK_SIZE 16
/* Variable key size between 128 and 256 bits. But the only valid
* values are 16 (128 bits), 24 (192 bits) and 32 (256 bits). */
#define TWOFISH_MIN_KEY_SIZE 16
#define TWOFISH_MAX_KEY_SIZE 32
#define TWOFISH_KEY_SIZE 32
struct twofish_ctx
{
uint32_t keys[40];
uitn32_t s_box[4][256];
};
void
twofish_set_key(struct twofish_ctx *ctx,
unsigned length, const uint8_t *key);
void
twofish_encrypt(struct twofish_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
void
twofish_decrypt(struct twofish_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
#endif /* NETTLE_TWOFISH_H_INCLUDED */
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