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 #include <sys/sha2.h> 28 29 void 30 zio_checksum_SHA256(const void *buf, uint64_t size, zio_cksum_t *zcp) 31 { 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]); 50 } 51