acss.h

   1 /*      $Id: acss.h,v 1.2 2004/02/06 04:22:43 dtucker Exp $ */
   2 /*
   3  * Copyright (c) 2004 The OpenBSD project
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #ifndef _ACSS_H_
  19 #define _ACSS_H_
  20
  21 /* 40bit key */
  22 #define ACSS_KEYSIZE            5
  23
  24 /* modes of acss */
  25 #define ACSS_AUTHENTICATE       0
  26 #define ACSS_SESSIONKEY         1
  27 #define ACSS_TITLEKEY           2
  28 #define ACSS_DATA               3
  29
  30 typedef struct acss_key_st {
  31         unsigned int    lfsr17;         /* current state of lfsrs */
  32         unsigned int    lfsr25;
  33         unsigned int    lfsrsum;
  34         unsigned char   seed[ACSS_KEYSIZE];
  35         unsigned char   data[ACSS_KEYSIZE];
  36         unsigned char   subkey[ACSS_KEYSIZE];
  37         int             encrypt;        /* XXX make these bit flags? */
  38         int             mode;
  39         int             seeded;
  40         int             subkey_avilable;
  41 } ACSS_KEY;
  42
  43 void acss_setkey(ACSS_KEY *, const unsigned char *, int, int);
  44 void acss_setsubkey(ACSS_KEY *, const unsigned char *);
  45 int acss(ACSS_KEY *, unsigned long, const unsigned char *, unsigned char *);
  46
  47 #endif /* ifndef _ACSS_H_ */