3 * $Id: cast-base.h,v 1.1 2000/06/17 10:48:29 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 /*----- Revision history --------------------------------------------------*
32 * $Log: cast-base.h,v $
33 * Revision 1.1 2000/06/17 10:48:29 mdw
34 * CAST round function macros.
38 #ifndef CATACOMB_CAST_BASE_H
39 #define CATACOMB_CAST_BASE_H
45 /*----- Header files ------------------------------------------------------*/
47 #include <mLib/bits.h>
49 /*----- Round functions ---------------------------------------------------*/
51 #define CAST_R_guts(km, kr, xx, yy, aop, bop, cop) do { \
52 uint32 i = km aop yy; \
55 xx ^= ((cast_s[0][U8(i >> 24)] bop \
56 cast_s[1][U8(i >> 16)]) cop \
57 cast_s[2][U8(i >> 8)]) aop \
58 cast_s[3][U8(i >> 0)]; \
61 #define CAST_R1(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, +, ^, -)
62 #define CAST_R2(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, ^, -, +)
63 #define CAST_R3(km, kr, xx, yy) CAST_R_guts(km, kr, xx, yy, -, +, ^)
65 /*----- Global variables --------------------------------------------------*/
67 extern uint32 cast_s
[4][256], cast_sk
[4][256];
69 /*----- That's all, folks -------------------------------------------------*/