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 /* 26 * Copyright 2013 Saso Kiselkov. All rights reserved. 27 */ 28 #include <sys/zfs_context.h> 29 #include <sys/zio.h> 30 #include <sys/sha2.h> 31 32 /*ARGSUSED*/ 33 void 34 zio_checksum_SHA256(const void *buf, uint64_t size, 35 const void *ctx_template, zio_cksum_t *zcp) 36 { 37 SHA2_CTX ctx; 38 zio_cksum_t tmp; 39 40 SHA2Init(SHA256, &ctx); 41 SHA2Update(&ctx, buf, size); 42 SHA2Final(&tmp, &ctx); 43 44 /* 45 * A prior implementation of this function had a 46 * private SHA256 implementation always wrote things out in 47 * Big Endian and there wasn't a byteswap variant of it. 48 * To preseve on disk compatibility we need to force that 49 * behaviour. 50 */ 51 zcp->zc_word[0] = BE_64(tmp.zc_word[0]); 52 zcp->zc_word[1] = BE_64(tmp.zc_word[1]); 53 zcp->zc_word[2] = BE_64(tmp.zc_word[2]); 54 zcp->zc_word[3] = BE_64(tmp.zc_word[3]); 55 } 56 57 /*ARGSUSED*/ 58 void 59 zio_checksum_SHA512_native(const void *buf, uint64_t size, 60 const void *ctx_template, zio_cksum_t *zcp) 61 { 62 SHA2_CTX ctx; 63 64 SHA2Init(SHA512_256, &ctx); 65 SHA2Update(&ctx, buf, size); 66 SHA2Final(zcp, &ctx); 67 } 68 69 /*ARGSUSED*/ 70 void 71 zio_checksum_SHA512_byteswap(const void *buf, uint64_t size, 72 const void *ctx_template, zio_cksum_t *zcp) 73 { 74 zio_cksum_t tmp; 75 76 zio_checksum_SHA512_native(buf, size, ctx_template, &tmp); 77 zcp->zc_word[0] = BSWAP_64(tmp.zc_word[0]); 78 zcp->zc_word[1] = BSWAP_64(tmp.zc_word[1]); 79 zcp->zc_word[2] = BSWAP_64(tmp.zc_word[2]); 80 zcp->zc_word[3] = BSWAP_64(tmp.zc_word[3]); 81 } 82