/*
 * $Id: cast.h,v 1.2 1998/03/28 14:27:01 grubba Exp $
 *
 *	CAST-128 in C
 *	Written by Steve Reid <sreid@sea-to-sky.net>
 *	100% Public Domain - no warranty
 *	Released 1997.10.11
 */

#ifndef _CAST_H_INCLUDED
#define _CAST_H_INCLUDED

#define CAST_MIN_KEYSIZE 5
#define CAST_MAX_KEYSIZE 16
#define CAST_BLOCKSIZE 8

#define CAST_SMALL_KEY 10
#define CAST_SMALL_ROUNDS 12
#define CAST_FULL_ROUNDS 16

#include "crypto_types.h"

struct cast_key {
	unsigned INT32 xkey[32];	/* Key, after expansion */
	unsigned rounds;		/* Number of rounds to use, 12 or 16 */
};

void cast_setkey(struct cast_key *key, unsigned INT8 *rawkey,
		 unsigned keybytes);
void cast_encrypt(struct cast_key *key, unsigned INT8 *inblock,
		  unsigned INT8 *outblock);
void cast_decrypt(struct cast_key *key, unsigned INT8 *inblock,
		  unsigned INT8* outblock);

#endif /* ifndef _CAST_H_INCLUDED */

