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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 | /* | |
428870ff | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
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23 | * Use is subject to license terms. |
24 | */ | |
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25 | #include <sys/zfs_context.h> |
26 | #include <sys/zio.h> | |
428870ff | 27 | #include <sys/sha2.h> |
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28 | |
29 | void | |
30 | zio_checksum_SHA256(const void *buf, uint64_t size, zio_cksum_t *zcp) | |
31 | { | |
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32 | SHA2_CTX ctx; |
33 | zio_cksum_t tmp; | |
34 | ||
35 | SHA2Init(SHA256, &ctx); | |
36 | SHA2Update(&ctx, buf, size); | |
37 | SHA2Final(&tmp, &ctx); | |
38 | ||
39 | /* | |
40 | * A prior implementation of this function had a | |
41 | * private SHA256 implementation always wrote things out in | |
42 | * Big Endian and there wasn't a byteswap variant of it. | |
43 | * To preseve on disk compatibility we need to force that | |
44 | * behaviour. | |
45 | */ | |
46 | zcp->zc_word[0] = BE_64(tmp.zc_word[0]); | |
47 | zcp->zc_word[1] = BE_64(tmp.zc_word[1]); | |
48 | zcp->zc_word[2] = BE_64(tmp.zc_word[2]); | |
49 | zcp->zc_word[3] = BE_64(tmp.zc_word[3]); | |
34dc7c2f | 50 | } |