des_soft.c revision 261046 
1/*-
2 * Copyright (c) 2009, Sun Microsystems, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 *   this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 *   this list of conditions and the following disclaimer in the documentation
11 *   and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 *   contributors may be used to endorse or promote products derived
14 *   from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#if defined(LIBC_SCCS) && !defined(lint)
30static char sccsid[] = "@(#)des_soft.c	2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
31#endif
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: stable/10/lib/libc/rpc/des_soft.c 261046 2014-01-22 23:45:27Z mav $");
34
35/*
36 * Table giving odd parity in the low bit for ASCII characters
37 */
38static char partab[128] = {
39	0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07,
40	0x08, 0x08, 0x0b, 0x0b, 0x0d, 0x0d, 0x0e, 0x0e,
41	0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16,
42	0x19, 0x19, 0x1a, 0x1a, 0x1c, 0x1c, 0x1f, 0x1f,
43	0x20, 0x20, 0x23, 0x23, 0x25, 0x25, 0x26, 0x26,
44	0x29, 0x29, 0x2a, 0x2a, 0x2c, 0x2c, 0x2f, 0x2f,
45	0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37,
46	0x38, 0x38, 0x3b, 0x3b, 0x3d, 0x3d, 0x3e, 0x3e,
47	0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46,
48	0x49, 0x49, 0x4a, 0x4a, 0x4c, 0x4c, 0x4f, 0x4f,
49	0x51, 0x51, 0x52, 0x52, 0x54, 0x54, 0x57, 0x57,
50	0x58, 0x58, 0x5b, 0x5b, 0x5d, 0x5d, 0x5e, 0x5e,
51	0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67,
52	0x68, 0x68, 0x6b, 0x6b, 0x6d, 0x6d, 0x6e, 0x6e,
53	0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76,
54	0x79, 0x79, 0x7a, 0x7a, 0x7c, 0x7c, 0x7f, 0x7f,
55};
56
57/*
58 * Add odd parity to low bit of 8 byte key
59 */
60void
61des_setparity(p)
62	char *p;
63{
64	int i;
65
66	for (i = 0; i < 8; i++) {
67		*p = partab[*p & 0x7f];
68		p++;
69	}
70}
71