www.pudn.com > cast_src.rar > cast256.h

/*	CAST-256 Block Cypher Implementation 
	Copyright (C) 1999, Daniel Roethlisberger 
 
	This program is free software; you can redistribute it and/or modify 
	it under the terms of the GNU General Public License as published by 
	the Free Software Foundation; either version 2 of the License, or 
	(at your option) any later version. 
 
	This program is distributed in the hope that it will be useful, 
	but WITHOUT ANY WARRANTY; without even the implied warranty of 
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
	GNU General Public License for more details. 
 
	You should have received a copy of the GNU General Public License 
	along with this program; if not, write to the Free Software 
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 
	The author of this program may be contacted at admin@roe.ch. 
*/ 
 
#ifndef _CAST256_H 
#define _CAST256_H 
 
#define DWORD unsigned long 
 
#define CAST_BLOCK_SIZE		16 
#define CAST_USERKEY_SIZE	32 
#define CAST_ROUNDS			12 
 
// 128 bit BETA 
typedef struct { 
	DWORD A; 
	DWORD B; 
	DWORD C; 
	DWORD D; 
} BETA; 
 
// 256 bit KAPPA 
typedef struct { 
	DWORD A; 
	DWORD B; 
	DWORD C; 
	DWORD D; 
	DWORD E; 
	DWORD F; 
	DWORD G; 
	DWORD H; 
} KAPPA; 
 
// Exported Functions 
void CAST256TableInit(void); 
void CAST256Encrypt(BETA *Kr, BETA *Km, BETA *pData); 
void CAST256Decrypt(BETA *Kr, BETA *Km, BETA *pData); 
void CAST256KeyInit(BETA *Kr, BETA *Km, KAPPA userKey); 
 
#endif /* _CAST256_H */