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 * Copyright (c) 2016 by Delphix. All rights reserved. 28 */ 29 #include <sys/zfs_context.h> 30 #include <sys/zio.h> 31 #include <sys/sha2.h> 32 #include <sys/abd.h> 33 34 static int 35 sha_incremental(void *buf, size_t size, void *arg) 36 { 37 SHA2_CTX *ctx = arg; 38 SHA2Update(ctx, buf, size); 39 return (0); 40 } 41 42 /*ARGSUSED*/ 43 void 44 abd_checksum_SHA256(abd_t *abd, uint64_t size, 45 const void *ctx_template, zio_cksum_t *zcp) 46 { 47 SHA2_CTX ctx; 48 zio_cksum_t tmp; 49 50 SHA2Init(SHA256, &ctx); 51 (void) abd_iterate_func(abd, 0, size, sha_incremental, &ctx); 52 SHA2Final(&tmp, &ctx); 53 54 /* 55 * A prior implementation of this function had a 56 * private SHA256 implementation always wrote things out in 57 * Big Endian and there wasn't a byteswap variant of it. 58 * To preserve on disk compatibility we need to force that 59 * behavior. 60 */ 61 zcp->zc_word[0] = BE_64(tmp.zc_word[0]); 62 zcp->zc_word[1] = BE_64(tmp.zc_word[1]); 63 zcp->zc_word[2] = BE_64(tmp.zc_word[2]); 64 zcp->zc_word[3] = BE_64(tmp.zc_word[3]); 65 } 66 67 /*ARGSUSED*/ 68 void 69 abd_checksum_SHA512_native(abd_t *abd, uint64_t size, 70 const void *ctx_template, zio_cksum_t *zcp) 71 { 72 SHA2_CTX ctx; 73 74 SHA2Init(SHA512_256, &ctx); 75 (void) abd_iterate_func(abd, 0, size, sha_incremental, &ctx); 76 SHA2Final(zcp, &ctx); 77 } 78 79 /*ARGSUSED*/ 80 void 81 abd_checksum_SHA512_byteswap(abd_t *abd, uint64_t size, 82 const void *ctx_template, zio_cksum_t *zcp) 83 { 84 zio_cksum_t tmp; 85 86 abd_checksum_SHA512_native(abd, size, ctx_template, &tmp); 87 zcp->zc_word[0] = BSWAP_64(tmp.zc_word[0]); 88 zcp->zc_word[1] = BSWAP_64(tmp.zc_word[1]); 89 zcp->zc_word[2] = BSWAP_64(tmp.zc_word[2]); 90 zcp->zc_word[3] = BSWAP_64(tmp.zc_word[3]); 91 } 92