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
zio_checksum_SHA256(const void * buf,uint64_t size,const void * ctx_template,zio_cksum_t * zcp)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
zio_checksum_SHA512_native(const void * buf,uint64_t size,const void * ctx_template,zio_cksum_t * zcp)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
zio_checksum_SHA512_byteswap(const void * buf,uint64_t size,const void * ctx_template,zio_cksum_t * zcp)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