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/* blowfish.h
*
* Blowfish block cipher.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 1998, 2001 FSF, Ray Dassen, 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_BLOWFISH_H_INCLUDED
#define NETTLE_BLOWFISH_H_INCLUDED
#include <inttypes.h>
#define BLOWFISH_BLOCK_SIZE 8
/* Variable key size between 64 and 448 bits. */
#define BLOWFISH_MIN_KEY_SIZE 8
#define BLOWFISH_MAX_KEY_SIZE 56
/* Default to 128 bits */
#define BLOWFISH_KEY_SIZE 16
#define _BLOWFISH_ROUNDS 16
enum blowfish_error { BLOWFISH_OK, BLOWFISH_WEAK_KEY };
struct blowfish_ctx
{
uint32_t s[4][256];
uint32_t p[_BLOWFISH_ROUNDS+2];
enum blowfish_error status;
};
/* On success, returns 1 and sets ctx->status to BLOWFISH_OK (zero).
* On error, returns 0 and sets ctx->status to BLOWFISH_WEAK_KEY. */
int
blowfish_set_key(struct blowfish_ctx *ctx,
unsigned length, const uint8_t *key);
void
blowfish_encrypt(struct blowfish_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
void
blowfish_decrypt(struct blowfish_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src);
#endif /* NETTLE_BLOWFISH_H_INCLUDED */
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