You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
/* twofish.h
|
|
|
|
The twofish block cipher.
|
|
|
|
Copyright (C) 2001, 2014 Niels Möller
|
|
|
|
This file is part of GNU Nettle.
|
|
|
|
GNU Nettle is free software: you can redistribute it and/or
|
|
modify it under the terms of either:
|
|
|
|
* the GNU Lesser General Public License as published by the Free
|
|
Software Foundation; either version 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
or
|
|
|
|
* the GNU General Public License as published by the Free
|
|
Software Foundation; either version 2 of the License, or (at your
|
|
option) any later version.
|
|
|
|
or both in parallel, as here.
|
|
|
|
GNU Nettle 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
|
|
General Public License for more details.
|
|
|
|
You should have received copies of the GNU General Public License and
|
|
the GNU Lesser General Public License along with this program. If
|
|
not, see http://www.gnu.org/licenses/.
|
|
*/
|
|
|
|
/*
|
|
* 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 "nettle-types.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Name mangling */
|
|
#define twofish_set_key nettle_twofish_set_key
|
|
#define twofish128_set_key nettle_twofish128_set_key
|
|
#define twofish192_set_key nettle_twofish192_set_key
|
|
#define twofish256_set_key nettle_twofish256_set_key
|
|
#define twofish_encrypt nettle_twofish_encrypt
|
|
#define twofish_decrypt nettle_twofish_decrypt
|
|
|
|
#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
|
|
#define TWOFISH128_KEY_SIZE 16
|
|
#define TWOFISH192_KEY_SIZE 24
|
|
#define TWOFISH256_KEY_SIZE 32
|
|
|
|
struct twofish_ctx
|
|
{
|
|
uint32_t keys[40];
|
|
uint32_t s_box[4][256];
|
|
};
|
|
|
|
void
|
|
twofish_set_key(struct twofish_ctx *ctx,
|
|
size_t length, const uint8_t *key);
|
|
void
|
|
twofish128_set_key(struct twofish_ctx *context, const uint8_t *key);
|
|
void
|
|
twofish192_set_key(struct twofish_ctx *context, const uint8_t *key);
|
|
void
|
|
twofish256_set_key(struct twofish_ctx *context, const uint8_t *key);
|
|
|
|
void
|
|
twofish_encrypt(const struct twofish_ctx *ctx,
|
|
size_t length, uint8_t *dst,
|
|
const uint8_t *src);
|
|
void
|
|
twofish_decrypt(const struct twofish_ctx *ctx,
|
|
size_t length, uint8_t *dst,
|
|
const uint8_t *src);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* NETTLE_TWOFISH_H_INCLUDED */
|