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 #ifdef __FreeBSD__ 31 #ifdef _KERNEL 32 #include <crypto/sha2/sha256.h> 33 #include <crypto/sha2/sha512t.h> 34 #else 35 #include <sha256.h> 36 #include <sha512t.h> 37 #endif 38 #else 39 #include <sys/sha2.h> 40 #endif 41 42 /*ARGSUSED*/ 43 void 44 zio_checksum_SHA256(const void *buf, uint64_t size, 45 const void *ctx_template, zio_cksum_t *zcp) 46 { 47 SHA256_CTX ctx; 48 zio_cksum_t tmp; 49 50 SHA256_Init(&ctx); 51 SHA256_Update(&ctx, buf, size); 52 SHA256_Final((unsigned char *)&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 preseve on disk compatibility we need to force that 59 * behaviour. 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 #ifndef __NetBSD__ 68 /*ARGSUSED*/ 69 void 70 zio_checksum_SHA512_native(const void *buf, uint64_t size, 71 const void *ctx_template, zio_cksum_t *zcp) 72 { 73 SHA512_CTX ctx; 74 75 SHA512_256_Init(&ctx); 76 SHA512_256_Update(&ctx, buf, size); 77 SHA512_256_Final((unsigned char *)zcp, &ctx); 78 } 79 80 /*ARGSUSED*/ 81 void 82 zio_checksum_SHA512_byteswap(const void *buf, uint64_t size, 83 const void *ctx_template, zio_cksum_t *zcp) 84 { 85 zio_cksum_t tmp; 86 87 zio_checksum_SHA512_native(buf, size, ctx_template, &tmp); 88 zcp->zc_word[0] = BSWAP_64(tmp.zc_word[0]); 89 zcp->zc_word[1] = BSWAP_64(tmp.zc_word[1]); 90 zcp->zc_word[2] = BSWAP_64(tmp.zc_word[2]); 91 zcp->zc_word[3] = BSWAP_64(tmp.zc_word[3]); 92 } 93 #endif 94