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/* $Id: acss.h,v 1.2 2004/02/06 04:22:43 dtucker Exp $ */
/*
* Copyright (c) 2004 The OpenBSD project
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _ACSS_H_
#define _ACSS_H_
/* 40bit key */
#define ACSS_KEYSIZE 5
/* modes of acss */
#define ACSS_AUTHENTICATE 0
#define ACSS_SESSIONKEY 1
#define ACSS_TITLEKEY 2
#define ACSS_DATA 3
typedef struct acss_key_st {
unsigned int lfsr17; /* current state of lfsrs */
unsigned int lfsr25;
unsigned int lfsrsum;
unsigned char seed[ACSS_KEYSIZE];
unsigned char data[ACSS_KEYSIZE];
unsigned char subkey[ACSS_KEYSIZE];
int encrypt; /* XXX make these bit flags? */
int mode;
int seeded;
int subkey_avilable;
} ACSS_KEY;
void acss_setkey(ACSS_KEY *, const unsigned char *, int, int);
void acss_setsubkey(ACSS_KEY *, const unsigned char *);
int acss(ACSS_KEY *, unsigned long, const unsigned char *, unsigned char *);
#endif /* ifndef _ACSS_H_ */
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