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/* arctwo.h
*
* The arctwo/rfc2268 block cipher.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2004 Simon Josefsson
* Copyright (C) 2002, 2004 Niels Möller
*
* 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 nettle 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.
*/
#ifndef NETTLE_ARCTWO_H_INCLUDED
#define NETTLE_ARCTWO_H_INCLUDED
#include "nettle-types.h"
/* Name mangling */
#define arctwo_set_key nettle_arctwo_set_key
#define arctwo_set_key_ekb nettle_arctwo_set_key_ekb
#define arctwo_encrypt nettle_arctwo_encrypt
#define arctwo_decrypt nettle_arctwo_decrypt
#define arctwo_set_key_gutmann nettle_arctwo_set_key_gutmann
#define ARCTWO_BLOCK_SIZE 8
/* Variable key size from 1 byte to 128 bytes. */
#define ARCTWO_MIN_KEY_SIZE 1
#define ARCTWO_MAX_KEY_SIZE 128
#define ARCTWO_KEY_SIZE 8
struct arctwo_ctx
{
uint16_t S[64];
};
/* Key expansion function that takes the "effective key bits", 1-1024,
as an explicit argument. 0 means maximum key bits. */
void
arctwo_set_key_ekb (struct arctwo_ctx *ctx,
unsigned length, const uint8_t * key, unsigned ekb);
/* Equvivalent to arctwo_set_key_ekb, with ekb = 8 * length */
void
arctwo_set_key (struct arctwo_ctx *ctx, unsigned length, const uint8_t *key);
/* Equvivalent to arctwo_set_key_ekb, with ekb = 1024 */
/* FIXME: Is this function really needed, and if so, what's the right
name for it? */
void
arctwo_set_key_gutmann (struct arctwo_ctx *ctx,
unsigned length, const uint8_t *key);
void
arctwo_encrypt (struct arctwo_ctx *ctx,
unsigned length, uint8_t *dst, const uint8_t *src);
void
arctwo_decrypt (struct arctwo_ctx *ctx,
unsigned length, uint8_t *dst, const uint8_t *src);
#endif /* NETTLE_ARCTWO_H_INCLUDED */
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