101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*
|
|
* 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
|
|
*/
|
|
/*
|
|
* Copyright 2013 Saso Kiselkov. All rights reserved.
|
|
* Copyright (c) 2016 by Delphix. All rights reserved.
|
|
*/
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/zio.h>
|
|
#include <sys/zio_checksum.h>
|
|
#include <sys/skein.h>
|
|
|
|
#include <sys/abd.h>
|
|
|
|
static int
|
|
skein_incremental(void *buf, size_t size, void *arg)
|
|
{
|
|
Skein_512_Ctxt_t *ctx = arg;
|
|
(void) Skein_512_Update(ctx, buf, size);
|
|
return (0);
|
|
}
|
|
/*
|
|
* 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 abd_checksum_skein_tmpl_init.
|
|
*/
|
|
void
|
|
abd_checksum_skein_native(abd_t *abd, uint64_t size,
|
|
const void *ctx_template, zio_cksum_t *zcp)
|
|
{
|
|
Skein_512_Ctxt_t ctx;
|
|
|
|
ASSERT(ctx_template != NULL);
|
|
memcpy(&ctx, ctx_template, sizeof (ctx));
|
|
(void) abd_iterate_func(abd, 0, size, skein_incremental, &ctx);
|
|
(void) Skein_512_Final(&ctx, (uint8_t *)zcp);
|
|
memset(&ctx, 0, sizeof (ctx));
|
|
}
|
|
|
|
/*
|
|
* Byteswapped version of abd_checksum_skein_native. This just invokes
|
|
* the native checksum function and byteswaps the resulting checksum (since
|
|
* skein is internally endian-insensitive).
|
|
*/
|
|
void
|
|
abd_checksum_skein_byteswap(abd_t *abd, uint64_t size,
|
|
const void *ctx_template, zio_cksum_t *zcp)
|
|
{
|
|
zio_cksum_t tmp;
|
|
|
|
abd_checksum_skein_native(abd, 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.
|
|
*/
|
|
void *
|
|
abd_checksum_skein_tmpl_init(const zio_cksum_salt_t *salt)
|
|
{
|
|
Skein_512_Ctxt_t *ctx = kmem_zalloc(sizeof (*ctx), KM_SLEEP);
|
|
|
|
(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.
|
|
*/
|
|
void
|
|
abd_checksum_skein_tmpl_free(void *ctx_template)
|
|
{
|
|
Skein_512_Ctxt_t *ctx = ctx_template;
|
|
|
|
memset(ctx, 0, sizeof (*ctx));
|
|
kmem_free(ctx, sizeof (*ctx));
|
|
}
|