3 * $Id: blowfish.h,v 1.3.2.1 1997/09/26 09:07:59 mdw Exp $
5 * Blowfish encryption routines
7 * (c) 1997 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 1.3.2.1 1997/09/26 09:07:59 mdw
33 * Use the Blowfish encryption algorithm instead of IDEA. This is partly
34 * because I prefer Blowfish (without any particularly strong evidence) but
35 * mainly because IDEA is patented and Blowfish isn't.
37 * Revision 1.3 1997/08/07 09:43:20 mdw
38 * Fix address of the FSF.
40 * Revision 1.2 1997/08/04 10:24:20 mdw
41 * Sources placed under CVS control.
43 * Revision 1.1 1997/07/21 13:47:53 mdw
55 /*----- Required headers --------------------------------------------------*/
61 /*----- Type definitions --------------------------------------------------*/
63 /* --- A blowfish expanded key --- */
65 typedef struct blowfish_key {
73 /* --- Size of a blowfish block --- */
75 #define BLOWFISH_BLKSIZE (8u)
77 /*----- Functions provided ------------------------------------------------*/
79 /* --- @blowfish_encrypt@ --- *
81 * Arguments: @const blowfish_key *k@ = pointer to key block
82 * @const voic *from@ = block to encrypt from
83 * @void *to@ = block to encrypt to
87 * Use: Encrypts a block using the Blowfish algorithm.
90 extern void blowfish_encrypt(const blowfish_key */*k*/,
91 const void */*from*/, void */*to*/);
94 /* --- @blowfish_decrypt@ --- *
96 * Arguments: @const blowfish_key *k@ = pointer to key block
97 * @const void *from@ = block to decrypt from
98 * @void *to@ = block to decrypt to
102 * Use: Decrypts a block using the Blowfish algorithm.
105 extern void blowfish_decrypt(const blowfish_key */*k*/,
106 const void */*from*/, void */*to*/);
108 /* --- @blowfish_setKey@ --- *
110 * Arguments: @blowfish_key *kb@ = pointer to key block to fill
111 * @void *k@ = pointer to key data
112 * @size_t sz@ = length of data in bytes
116 * Use: Expands a key which isn't represented as a number of whole
117 * words. This is a nonstandard extension, although it can be
118 * used to support 40-bit keys, which some governments might
119 * find more palatable than 160-bit (or 448-bit!) keys.
122 extern void blowfish_setKey(blowfish_key */*kb*/,
123 const void */*k*/, size_t /*sz*/);
125 /*----- That's all, folks -------------------------------------------------*/