Changeset View
Changeset View
Standalone View
Standalone View
head/sys/cddl/boot/zfs/skein_zfs.c
Property | Old Value | New Value |
---|---|---|
svn:eol-style | null | native \ No newline at end of property |
svn:keywords | null | FreeBSD=%H \ No newline at end of property |
svn:mime-type | null | text/plain \ No newline at end of property |
/* | |||||
* CDDL HEADER START | |||||
* | |||||
* The contents of this file are subject to the terms of the | |||||
* Common Development and Distribution License (the "License"). | |||||
* You may not use this file except in compliance with the License. | |||||
* | |||||
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |||||
* or http://opensource.org/licenses/CDDL-1.0. | |||||
* See the License for the specific language governing permissions | |||||
* and limitations under the License. | |||||
* | |||||
* When distributing Covered Code, include this CDDL HEADER in each | |||||
* file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |||||
* If applicable, add the following below this CDDL HEADER, with the | |||||
* fields enclosed by brackets "[]" replaced with your own identifying | |||||
* information: Portions Copyright [yyyy] [name of copyright owner] | |||||
* | |||||
* CDDL HEADER END | |||||
* | |||||
* $FreeBSD$ | |||||
*/ | |||||
/* | |||||
* Copyright 2013 Saso Kiselkov. All rights reserved. | |||||
*/ | |||||
#include <skein.h> | |||||
/* | |||||
* Computes a native 256-bit skein MAC checksum. Please note that this | |||||
* function requires the presence of a ctx_template that should be allocated | |||||
* using zio_checksum_skein_tmpl_init. | |||||
*/ | |||||
/*ARGSUSED*/ | |||||
static void | |||||
zio_checksum_skein_native(const void *buf, uint64_t size, | |||||
const void *ctx_template, zio_cksum_t *zcp) | |||||
{ | |||||
Skein_512_Ctxt_t ctx; | |||||
ASSERT(ctx_template != NULL); | |||||
bcopy(ctx_template, &ctx, sizeof (ctx)); | |||||
(void) Skein_512_Update(&ctx, buf, size); | |||||
(void) Skein_512_Final(&ctx, (uint8_t *)zcp); | |||||
bzero(&ctx, sizeof (ctx)); | |||||
} | |||||
/* | |||||
* Byteswapped version of zio_checksum_skein_native. This just invokes | |||||
* the native checksum function and byteswaps the resulting checksum (since | |||||
* skein is internally endian-insensitive). | |||||
*/ | |||||
static void | |||||
zio_checksum_skein_byteswap(const void *buf, uint64_t size, | |||||
const void *ctx_template, zio_cksum_t *zcp) | |||||
{ | |||||
zio_cksum_t tmp; | |||||
zio_checksum_skein_native(buf, size, ctx_template, &tmp); | |||||
zcp->zc_word[0] = BSWAP_64(tmp.zc_word[0]); | |||||
zcp->zc_word[1] = BSWAP_64(tmp.zc_word[1]); | |||||
zcp->zc_word[2] = BSWAP_64(tmp.zc_word[2]); | |||||
zcp->zc_word[3] = BSWAP_64(tmp.zc_word[3]); | |||||
} | |||||
/* | |||||
* Allocates a skein MAC template suitable for using in skein MAC checksum | |||||
* computations and returns a pointer to it. | |||||
*/ | |||||
static void * | |||||
zio_checksum_skein_tmpl_init(const zio_cksum_salt_t *salt) | |||||
{ | |||||
Skein_512_Ctxt_t *ctx; | |||||
ctx = malloc(sizeof (*ctx)); | |||||
bzero(ctx, sizeof (*ctx)); | |||||
(void) Skein_512_InitExt(ctx, sizeof (zio_cksum_t) * 8, 0, | |||||
salt->zcs_bytes, sizeof (salt->zcs_bytes)); | |||||
return (ctx); | |||||
} | |||||
/* | |||||
* Frees a skein context template previously allocated using | |||||
* zio_checksum_skein_tmpl_init. | |||||
*/ | |||||
static void | |||||
zio_checksum_skein_tmpl_free(void *ctx_template) | |||||
{ | |||||
Skein_512_Ctxt_t *ctx = ctx_template; | |||||
bzero(ctx, sizeof (*ctx)); | |||||
free(ctx); | |||||
} |