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