3 * $Id: blowfish.h,v 1.5 1998/01/12 16:45:45 mdw Exp $
5 * Blowfish encryption routines
7 * (c) 1998 Mark Wooding
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of `become'
14 * `Become' is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * `Become' 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 General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with `become'; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Revision history --------------------------------------------------*
31 * $Log: blowfish.h,v $
32 * Revision 1.5 1998/01/12 16:45:45 mdw
35 * Revision 1.4 1997/09/26 09:14:57 mdw
36 * Merged blowfish branch into trunk.
38 * Revision 1.3.2.1 1997/09/26 09:07:59 mdw
39 * Use the Blowfish encryption algorithm instead of IDEA. This is partly
40 * because I prefer Blowfish (without any particularly strong evidence) but
41 * mainly because IDEA is patented and Blowfish isn't.
43 * Revision 1.3 1997/08/07 09:43:20 mdw
44 * Fix address of the FSF.
46 * Revision 1.2 1997/08/04 10:24:20 mdw
47 * Sources placed under CVS control.
49 * Revision 1.1 1997/07/21 13:47:53 mdw
61 /*----- Required headers --------------------------------------------------*/
67 /*----- Type definitions --------------------------------------------------*/
69 /* --- A blowfish expanded key --- */
71 typedef struct blowfish_key
{
79 /* --- Size of a blowfish block --- */
81 #define BLOWFISH_BLKSIZE (8u)
83 /*----- Functions provided ------------------------------------------------*/
85 /* --- @blowfish_encrypt@ --- *
87 * Arguments: @const blowfish_key *k@ = pointer to key block
88 * @const voic *from@ = block to encrypt from
89 * @void *to@ = block to encrypt to
93 * Use: Encrypts a block using the Blowfish algorithm.
96 extern void blowfish_encrypt(const blowfish_key */
*k*/
,
97 const void */
*from*/
, void */
*to*/
);
100 /* --- @blowfish_decrypt@ --- *
102 * Arguments: @const blowfish_key *k@ = pointer to key block
103 * @const void *from@ = block to decrypt from
104 * @void *to@ = block to decrypt to
108 * Use: Decrypts a block using the Blowfish algorithm.
111 extern void blowfish_decrypt(const blowfish_key */
*k*/
,
112 const void */
*from*/
, void */
*to*/
);
114 /* --- @blowfish_setKey@ --- *
116 * Arguments: @blowfish_key *kb@ = pointer to key block to fill
117 * @void *k@ = pointer to key data
118 * @size_t sz@ = length of data in bytes
122 * Use: Expands a key which isn't represented as a number of whole
123 * words. This is a nonstandard extension, although it can be
124 * used to support 40-bit keys, which some governments might
125 * find more palatable than 160-bit (or 448-bit!) keys.
128 extern void blowfish_setKey(blowfish_key */
*kb*/
,
129 const void */
*k*/
, size_t /*sz*/);
131 /*----- That's all, folks -------------------------------------------------*/