3 * $Id: blowfish.h,v 1.2 1999/12/10 23:29:48 mdw Exp $
5 * The Blowfish block cipher
7 * (c) 1998 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
32 * $Log: blowfish.h,v $
33 * Revision 1.2 1999/12/10 23:29:48 mdw
34 * Change header file guard names.
36 * Revision 1.1 1999/09/03 08:41:11 mdw
41 /*----- Notes on the Blowfish block cipher --------------------------------*
43 * Blowfish was invented by Bruce Schneier. The algorithm is unpatented and
44 * free for anyone to use. It's fast, simple, offers a big key, and is
45 * looking relatively bulletproof. It's also this author's block cipher of
46 * choice, for what little that's worth. The disadvantage is that Blowfish
47 * has a particularly heavyweight key schedule.
50 #ifndef CATACOMB_BLOWFISH_H
51 #define CATACOMB_BLOWFISH_H
57 /*----- Header files ------------------------------------------------------*/
61 #include <mLib/bits.h>
63 /*----- Magical numbers ---------------------------------------------------*/
65 #define BLOWFISH_BLKSZ 8
66 #define BLOWFISH_KEYSZ 0
67 #define BLOWFISH_CLASS (N, B, 64)
69 /*----- Data structures ---------------------------------------------------*/
71 typedef struct blowfish_ctx
{
73 uint32 s0
[256], s1
[256], s2
[256], s3
[256];
76 /*----- Functions provided ------------------------------------------------*/
78 /* --- @blowfish_init@ --- *
80 * Arguments: @blowfish_ctx *k@ = pointer to key block to fill in
81 * @const void *buf@ = pointer to buffer of key material
82 * @size_t sz@ = size of key material
86 * Use: Initializes a Blowfish key buffer. Blowfish accepts
87 * a more-or-less arbitrary size key.
90 extern void blowfish_init(blowfish_ctx */
*k*/
,
91 const void */
*buf*/
, size_t /*sz*/);
93 /* --- @blowfish_eblk@, @blowfish_dblk@ --- *
95 * Arguments: @const blowfish_ctx *k@ = pointer to key block
96 * @const uint32 s[2]@ = pointer to source block
97 * @uint32 d[2]@ = pointer to destination block
101 * Use: Low-level block encryption and decryption.
104 extern void blowfish_eblk(const blowfish_ctx */
*k*/
,
105 const uint32 */
*s*/
, uint32 */
*d*/
);
107 extern void blowfish_dblk(const blowfish_ctx */
*k*/
,
108 const uint32 */
*s*/
, uint32 */
*d*/
);
110 /*----- That's all, folks -------------------------------------------------*/