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/*
* This file is part of ipif, part of userv-utils
*
* Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk>
* Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk>
* Copyright 1999,2003
* Chancellor Masters and Scholars of the University of Cambridge
* Copyright 2010 Tony Finch <fanf@dotat.at>
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 a copy of the GNU General Public License
* along with userv-utils; if not, see http://www.gnu.org/licenses/.
*/
#ifndef BLOWFISH__H_INCLUDED
#define BLOWFISH__H_INCLUDED
#include <stdint.h>
#define BLOWFISH_BLOCKBYTES 8
#define BLOWFISH_MAXKEYBYTES 56
#define BLOWFISH__N 16
#define BLOWFISH__PSIZE BLOWFISH__N+2
typedef uint32_t blowfish__p[BLOWFISH__PSIZE];
typedef uint32_t blowfish__s[4][256];
struct blowfish_expandedkey {
blowfish__p p;
blowfish__s s;
};
/* It's ok to pass the [_cbc]_(en|de)crypt functions the same
* input and output pointers.
*/
void blowfish_loadkey(struct blowfish_expandedkey *ek,
const uint8_t *key, int keybytes);
void blowfish_encrypt(const struct blowfish_expandedkey *ek,
const uint8_t plain[BLOWFISH_BLOCKBYTES],
uint8_t cipher[BLOWFISH_BLOCKBYTES]);
void blowfish_decrypt(const struct blowfish_expandedkey *ek,
const uint8_t cipher[BLOWFISH_BLOCKBYTES],
uint8_t plain[BLOWFISH_BLOCKBYTES]);
struct blowfish_cbc_state {
struct blowfish_expandedkey ek;
uint32_t chainl, chainr;
};
void blowfish_cbc_setiv(struct blowfish_cbc_state *cs,
const uint8_t iv[BLOWFISH_BLOCKBYTES]);
void blowfish_cbc_encrypt(struct blowfish_cbc_state *cs,
const uint8_t plain[BLOWFISH_BLOCKBYTES],
uint8_t cipher[BLOWFISH_BLOCKBYTES]);
void blowfish_cbc_decrypt(struct blowfish_cbc_state *cs,
const uint8_t cipher[BLOWFISH_BLOCKBYTES],
uint8_t plain[BLOWFISH_BLOCKBYTES]);
#endif
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