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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/zfs_context.h>
#include <sys/zio.h>
#ifdef _KERNEL
#include <crypto/sha2/sha2.h>
#else
#include <sha256.h>
#endif
void
zio_checksum_SHA256(const void *buf, uint64_t size, zio_cksum_t *zcp)
{
SHA256_CTX ctx;
zio_cksum_t tmp;
SHA256_Init(&ctx);
SHA256_Update(&ctx, buf, size);
SHA256_Final((unsigned char *)&tmp, &ctx);
/*
* A prior implementation of this function had a
* private SHA256 implementation always wrote things out in
* Big Endian and there wasn't a byteswap variant of it.
* To preseve on disk compatibility we need to force that
* behaviour.
*/
zcp->zc_word[0] = BE_64(tmp.zc_word[0]);
zcp->zc_word[1] = BE_64(tmp.zc_word[1]);
zcp->zc_word[2] = BE_64(tmp.zc_word[2]);
zcp->zc_word[3] = BE_64(tmp.zc_word[3]);
}
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