74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
|
/*
|
||
|
|
* Blowfish - a fast block cipher designed by Bruce Schneier
|
||
|
|
*
|
||
|
|
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
|
* must display the following acknowledgement:
|
||
|
|
* This product includes software developed by Niels Provos.
|
||
|
|
* 4. The name of the author may not be used to endorse or promote products
|
||
|
|
* derived from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* $FreeBSD: src/secure/lib/libcrypt/blowfish.h,v 1.3 2003/06/02 19:17:24 markm Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* FreeBSD implementation by Paul Herman <pherman@frenchfries.net>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _BLF_H_
|
||
|
|
#define _BLF_H_
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/* Schneier states the maximum key length to be 56 bytes.
|
||
|
|
* The way how the subkeys are initalized by the key up
|
||
|
|
* to (N+2)*4 i.e. 72 bytes are utilized.
|
||
|
|
* Warning: For normal blowfish encryption only 56 bytes
|
||
|
|
* of the key affect all cipherbits.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define BLF_N 16 /* Number of Subkeys */
|
||
|
|
|
||
|
|
/* Blowfish context */
|
||
|
|
typedef struct BlowfishContext {
|
||
|
|
u_int32_t S[4][256]; /* S-Boxes */
|
||
|
|
u_int32_t P[BLF_N + 2]; /* Subkeys */
|
||
|
|
} blf_ctx;
|
||
|
|
|
||
|
|
/* Raw access to customized Blowfish
|
||
|
|
* blf_key is just:
|
||
|
|
* Blowfish_initstate( state )
|
||
|
|
* Blowfish_expand0state( state, key, keylen )
|
||
|
|
*/
|
||
|
|
|
||
|
|
void Blowfish_initstate(blf_ctx *);
|
||
|
|
void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
|
||
|
|
void Blowfish_expandstate
|
||
|
|
(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
|
||
|
|
u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t, u_int16_t *);
|
||
|
|
|
||
|
|
void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
|
||
|
|
|
||
|
|
#endif /* _BLF_H_ */
|