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34dc7c2f BB |
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 | /* | |
cae5b340 | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
9c905c55 | 25 | /* |
cae5b340 AX |
26 | * Copyright 2013 Saso Kiselkov. All rights reserved. |
27 | * Copyright (c) 2016 by Delphix. All rights reserved. | |
9c905c55 | 28 | */ |
cae5b340 AX |
29 | #include <sys/zfs_context.h> |
30 | #include <sys/zio.h> | |
31 | #include <sys/sha2.h> | |
32 | #include <sys/abd.h> | |
9c905c55 | 33 | |
cae5b340 AX |
34 | static int |
35 | sha_incremental(void *buf, size_t size, void *arg) | |
9c905c55 | 36 | { |
cae5b340 AX |
37 | SHA2_CTX *ctx = arg; |
38 | SHA2Update(ctx, buf, size); | |
39 | return (0); | |
9c905c55 | 40 | } |
34dc7c2f | 41 | |
cae5b340 | 42 | /*ARGSUSED*/ |
34dc7c2f | 43 | void |
cae5b340 AX |
44 | abd_checksum_SHA256(abd_t *abd, uint64_t size, |
45 | const void *ctx_template, zio_cksum_t *zcp) | |
34dc7c2f | 46 | { |
cae5b340 AX |
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 | } | |
9c905c55 | 66 | |
cae5b340 AX |
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; | |
9c905c55 | 73 | |
cae5b340 AX |
74 | SHA2Init(SHA512_256, &ctx); |
75 | (void) abd_iterate_func(abd, 0, size, sha_incremental, &ctx); | |
76 | SHA2Final(zcp, &ctx); | |
77 | } | |
9c905c55 | 78 | |
cae5b340 AX |
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; | |
9c905c55 | 85 | |
cae5b340 AX |
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]); | |
34dc7c2f | 91 | } |