3 * $Id: cast-base.h,v 1.3 2004/04/08 01:36:15 mdw Exp $
5 * Basic macros and definitions for CAST-128 and CAST-256
7 * (c) 2000 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 #ifndef CATACOMB_CAST_BASE_H
31 #define CATACOMB_CAST_BASE_H
37 /*----- Header files ------------------------------------------------------*/
39 #include <mLib/bits.h>
41 /*----- Round functions ---------------------------------------------------*/
43 #define CAST_R_guts(km, kr, xx, yy, aop, bop, cop) do { \
44 uint32 i = km aop yy; \
47 xx ^= ((cast_s[0][U8(i >> 24)] bop \
48 cast_s[1][U8(i >> 16)]) cop \
49 cast_s[2][U8(i >> 8)]) aop \
50 cast_s[3][U8(i >> 0)]; \
53 #define CAST_R1(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, +, ^, -)
54 #define CAST_R2(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, ^, -, +)
55 #define CAST_R3(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, -, +, ^)
57 /*----- Global variables --------------------------------------------------*/
59 extern const uint32 cast_s
[4][256], cast_sk
[4][256];
61 /*----- That's all, folks -------------------------------------------------*/