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/* cast128.h
*
* The CAST-128 block cipher.
*/
/* CAST-128 in C
* Written by Steve Reid <sreid@sea-to-sky.net>
* 100% Public Domain - no warranty
* Released 1997.10.11
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001 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_CAST128_H_INCLUDED
#define NETTLE_CAST128_H_INCLUDED
#include "nettle-types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define cast128_set_key nettle_cast128_set_key
#define cast128_encrypt nettle_cast128_encrypt
#define cast128_decrypt nettle_cast128_decrypt
#define CAST128_BLOCK_SIZE 8
/* Variable key size between 40 and 128. */
#define CAST128_MIN_KEY_SIZE 5
#define CAST128_MAX_KEY_SIZE 16
#define CAST128_KEY_SIZE 16
struct cast128_ctx
{
uint32_t keys[32]; /* Key, after expansion */
unsigned rounds; /* Number of rounds to use, 12 or 16 */
};
void
cast128_set_key(struct cast128_ctx *ctx,
unsigned length, const uint8_t *key);
void
cast128_encrypt(struct cast128_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
void
cast128_decrypt(struct cast128_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_CAST128_H_INCLUDED */
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