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.
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.
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]
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
25 #include <sys/zfs_context.h>
30 zio_checksum_SHA256(const void *buf
, uint64_t size
, zio_cksum_t
*zcp
)
35 SHA2Init(SHA256
, &ctx
);
36 SHA2Update(&ctx
, buf
, size
);
37 SHA2Final(&tmp
, &ctx
);
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
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]);