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/* blowfish.h
*
* Blowfish block cipher.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2014 Niels Möller
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02111-1301, USA.
*/
#ifndef NETTLE_BLOWFISH_H_INCLUDED
#define NETTLE_BLOWFISH_H_INCLUDED
#include "nettle-types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define blowfish_set_key nettle_blowfish_set_key
#define blowfish128_set_key nettle_blowfish128_set_key
#define blowfish_encrypt nettle_blowfish_encrypt
#define blowfish_decrypt nettle_blowfish_decrypt
#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 BLOWFISH128_KEY_SIZE 16
#define _BLOWFISH_ROUNDS 16
struct blowfish_ctx
{
uint32_t s[4][256];
uint32_t p[_BLOWFISH_ROUNDS+2];
};
/* Returns 0 for weak keys, otherwise 1. */
int
blowfish_set_key(struct blowfish_ctx *ctx,
size_t length, const uint8_t *key);
int
blowfish128_set_key(struct blowfish_ctx *ctx, const uint8_t *key);
void
blowfish_encrypt(const struct blowfish_ctx *ctx,
size_t length, uint8_t *dst,
const uint8_t *src);
void
blowfish_decrypt(const struct blowfish_ctx *ctx,
size_t length, uint8_t *dst,
const uint8_t *src);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_BLOWFISH_H_INCLUDED */
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