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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25/*
26 * Copyright 2013 Saso Kiselkov. All rights reserved.
27 */
28#include <sys/zfs_context.h>
29#include <sys/zio.h>
30#ifdef __FreeBSD__
31#ifdef _KERNEL
32#include <crypto/sha2/sha256.h>
33#include <crypto/sha2/sha512t.h>
34#else
35#include <sha256.h>
36#include <sha512t.h>
37#endif
38#else
39#include <sys/sha2.h>
40#endif
41
42/*ARGSUSED*/
43void
44zio_checksum_SHA256(const void *buf, uint64_t size,
45    const void *ctx_template, zio_cksum_t *zcp)
46{
47	SHA256_CTX ctx;
48	zio_cksum_t tmp;
49
50	SHA256_Init(&ctx);
51	SHA256_Update(&ctx, buf, size);
52	SHA256_Final((unsigned char *)&tmp, &ctx);
53
54	/*
55	 * A prior implementation of this function had a
56	 * private SHA256 implementation always wrote things out in
57	 * Big Endian and there wasn't a byteswap variant of it.
58	 * To preseve on disk compatibility we need to force that
59	 * behaviour.
60	 */
61	zcp->zc_word[0] = BE_64(tmp.zc_word[0]);
62	zcp->zc_word[1] = BE_64(tmp.zc_word[1]);
63	zcp->zc_word[2] = BE_64(tmp.zc_word[2]);
64	zcp->zc_word[3] = BE_64(tmp.zc_word[3]);
65}
66
67#ifndef __NetBSD__
68/*ARGSUSED*/
69void
70zio_checksum_SHA512_native(const void *buf, uint64_t size,
71    const void *ctx_template, zio_cksum_t *zcp)
72{
73	SHA512_CTX	ctx;
74
75	SHA512_256_Init(&ctx);
76	SHA512_256_Update(&ctx, buf, size);
77	SHA512_256_Final((unsigned char *)zcp, &ctx);
78}
79
80/*ARGSUSED*/
81void
82zio_checksum_SHA512_byteswap(const void *buf, uint64_t size,
83    const void *ctx_template, zio_cksum_t *zcp)
84{
85	zio_cksum_t	tmp;
86
87	zio_checksum_SHA512_native(buf, size, ctx_template, &tmp);
88	zcp->zc_word[0] = BSWAP_64(tmp.zc_word[0]);
89	zcp->zc_word[1] = BSWAP_64(tmp.zc_word[1]);
90	zcp->zc_word[2] = BSWAP_64(tmp.zc_word[2]);
91	zcp->zc_word[3] = BSWAP_64(tmp.zc_word[3]);
92}
93#endif
94