1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1998, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#ifndef	_SYS_SHA1_CONSTS_H
28#define	_SYS_SHA1_CONSTS_H
29
30#ifdef	__cplusplus
31extern "C" {
32#endif
33
34/*
35 * as explained in sha1.c, loading 32-bit constants on a sparc is expensive
36 * since it involves both a `sethi' and an `or'.  thus, we instead use `ld'
37 * to load the constants from an array called `sha1_consts'.  however, on
38 * intel (and perhaps other processors), it is cheaper to load the constant
39 * directly.  thus, the c code in SHA1Transform() uses the macro SHA1_CONST()
40 * which either expands to a constant or an array reference, depending on
41 * the architecture the code is being compiled for.
42 */
43
44#include <sys/types.h>		/* uint32_t */
45
46extern	const uint32_t	sha1_consts[];
47
48#if	defined(__sparc)
49#define	SHA1_CONST(x)		(sha1_consts[x])
50#else
51#define	SHA1_CONST(x)		(SHA1_CONST_ ## x)
52#endif
53
54/* constants, as provided in FIPS 180-1 */
55
56#define	SHA1_CONST_0		0x5a827999U
57#define	SHA1_CONST_1		0x6ed9eba1U
58#define	SHA1_CONST_2		0x8f1bbcdcU
59#define	SHA1_CONST_3		0xca62c1d6U
60
61#ifdef	__cplusplus
62}
63#endif
64
65#endif /* _SYS_SHA1_CONSTS_H */
66