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#include <sys/zfs_context.h> 26#include <sys/zio.h> 27#ifdef _KERNEL 28#include <crypto/sha2/sha2.h> 29#else 30#include <sha256.h> 31#endif 32 33void 34zio_checksum_SHA256(const void *buf, uint64_t size, zio_cksum_t *zcp) 35{ 36 SHA256_CTX ctx; 37 zio_cksum_t tmp; 38 39 SHA256_Init(&ctx); 40 SHA256_Update(&ctx, buf, size); 41 SHA256_Final((unsigned char *)&tmp, &ctx); 42 43 /* 44 * A prior implementation of this function had a 45 * private SHA256 implementation always wrote things out in 46 * Big Endian and there wasn't a byteswap variant of it. 47 * To preseve on disk compatibility we need to force that 48 * behaviour. 49 */ 50 zcp->zc_word[0] = BE_64(tmp.zc_word[0]); 51 zcp->zc_word[1] = BE_64(tmp.zc_word[1]); 52 zcp->zc_word[2] = BE_64(tmp.zc_word[2]); 53 zcp->zc_word[3] = BE_64(tmp.zc_word[3]); 54} 55