2 * Copyright (C) 1997,2000,2003 Ian Jackson
3 * This file is part of ipif, part of userv-utils
5 * This is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with userv-utils; if not, write to the Free Software
17 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #ifndef BLOWFISH__H_INCLUDED
21 #define BLOWFISH__H_INCLUDED
25 #define BLOWFISH_BLOCKBYTES 8
26 #define BLOWFISH_MAXKEYBYTES 56
27 #define BLOWFISH__N 16
28 #define BLOWFISH__PSIZE BLOWFISH__N+2
30 typedef uint32_t blowfish__p[BLOWFISH__PSIZE];
31 typedef uint32_t blowfish__s[4][256];
33 struct blowfish_expandedkey {
38 /* It's ok to pass the [_cbc]_(en|de)crypt functions the same
39 * input and output pointers.
42 void blowfish_loadkey(struct blowfish_expandedkey *ek,
43 const uint8_t *key, int keybytes);
44 void blowfish_encrypt(const struct blowfish_expandedkey *ek,
45 const uint8_t plain[BLOWFISH_BLOCKBYTES],
46 uint8_t cipher[BLOWFISH_BLOCKBYTES]);
47 void blowfish_decrypt(const struct blowfish_expandedkey *ek,
48 const uint8_t cipher[BLOWFISH_BLOCKBYTES],
49 uint8_t plain[BLOWFISH_BLOCKBYTES]);
51 struct blowfish_cbc_state {
52 struct blowfish_expandedkey ek;
53 uint32_t chainl, chainr;
56 void blowfish_cbc_setiv(struct blowfish_cbc_state *cs,
57 const uint8_t iv[BLOWFISH_BLOCKBYTES]);
58 void blowfish_cbc_encrypt(struct blowfish_cbc_state *cs,
59 const uint8_t plain[BLOWFISH_BLOCKBYTES],
60 uint8_t cipher[BLOWFISH_BLOCKBYTES]);
61 void blowfish_cbc_decrypt(struct blowfish_cbc_state *cs,
62 const uint8_t cipher[BLOWFISH_BLOCKBYTES],
63 uint8_t plain[BLOWFISH_BLOCKBYTES]);