blob: 3890d4adfd641928146662aa920390fb5f521e5e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* $Source$
* $Author$
*
* Copyright 1989, 1990 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* For copying and distribution information, please see the file
* <krb5/copyright.h>.
*
* These routines check and fix parity of encryption keys for the DES
* algorithm.
*
* Under U.S. law, this software may not be exported outside the US
* without license from the U.S. Commerce department.
*
* These routines form the library interface to the DES facilities.
*
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_key_parity_c[] =
"$Id$";
#endif /* !lint & !SABER */
#include <krb5/krb5.h>
#include "des_int.h"
#include "odd.h" /* Load compile-time generated odd_parity table */
/*
* des_fixup_key_parity: Forces odd parity per byte; parity is bits
* 8,16,...64 in des order, implies 0, 8, 16, ...
* vax order.
*/
void
mit_des_fixup_key_parity(key)
register mit_des_cblock key;
{
int i;
for (i=0; i<sizeof(mit_des_cblock); i++)
key[i] = odd_parity[key[i]];
return;
}
/*
* des_check_key_parity: returns true iff key has the correct des parity.
* See des_fix_key_parity for the definition of
* correct des parity.
*/
int
mit_des_check_key_parity(key)
register mit_des_cblock key;
{
int i;
for (i=0; i<sizeof(mit_des_cblock); i++)
if (key[i] != odd_parity[key[i]])
return(0);
return(1);
}
|
