116 lines
3.2 KiB
C
116 lines
3.2 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.
|
|
* Use is subject to license terms.
|
|
*/
|
|
/*
|
|
* Copyright (c) 2016 by Delphix. All rights reserved.
|
|
*/
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/zio.h>
|
|
#include <sys/zio_checksum.h>
|
|
#include <sys/edonr.h>
|
|
#include <sys/abd.h>
|
|
|
|
#define EDONR_MODE 512
|
|
#define EDONR_BLOCK_SIZE EdonR512_BLOCK_SIZE
|
|
|
|
static int
|
|
edonr_incremental(void *buf, size_t size, void *arg)
|
|
{
|
|
EdonRState *ctx = arg;
|
|
EdonRUpdate(ctx, buf, size * 8);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Native zio_checksum interface for the Edon-R hash function.
|
|
*/
|
|
/*ARGSUSED*/
|
|
void
|
|
abd_checksum_edonr_native(abd_t *abd, uint64_t size,
|
|
const void *ctx_template, zio_cksum_t *zcp)
|
|
{
|
|
uint8_t digest[EDONR_MODE / 8];
|
|
EdonRState ctx;
|
|
|
|
ASSERT(ctx_template != NULL);
|
|
bcopy(ctx_template, &ctx, sizeof (ctx));
|
|
(void) abd_iterate_func(abd, 0, size, edonr_incremental, &ctx);
|
|
EdonRFinal(&ctx, digest);
|
|
bcopy(digest, zcp->zc_word, sizeof (zcp->zc_word));
|
|
}
|
|
|
|
/*
|
|
* Byteswapped zio_checksum interface for the Edon-R hash function.
|
|
*/
|
|
void
|
|
abd_checksum_edonr_byteswap(abd_t *abd, uint64_t size,
|
|
const void *ctx_template, zio_cksum_t *zcp)
|
|
{
|
|
zio_cksum_t tmp;
|
|
|
|
abd_checksum_edonr_native(abd, size, ctx_template, &tmp);
|
|
zcp->zc_word[0] = BSWAP_64(zcp->zc_word[0]);
|
|
zcp->zc_word[1] = BSWAP_64(zcp->zc_word[1]);
|
|
zcp->zc_word[2] = BSWAP_64(zcp->zc_word[2]);
|
|
zcp->zc_word[3] = BSWAP_64(zcp->zc_word[3]);
|
|
}
|
|
|
|
void *
|
|
abd_checksum_edonr_tmpl_init(const zio_cksum_salt_t *salt)
|
|
{
|
|
EdonRState *ctx;
|
|
uint8_t salt_block[EDONR_BLOCK_SIZE];
|
|
|
|
/*
|
|
* Edon-R needs all but the last hash invocation to be on full-size
|
|
* blocks, but the salt is too small. Rather than simply padding it
|
|
* with zeros, we expand the salt into a new salt block of proper
|
|
* size by double-hashing it (the new salt block will be composed of
|
|
* H(salt) || H(H(salt))).
|
|
*/
|
|
CTASSERT(EDONR_BLOCK_SIZE == 2 * (EDONR_MODE / 8));
|
|
EdonRHash(EDONR_MODE, salt->zcs_bytes, sizeof (salt->zcs_bytes) * 8,
|
|
salt_block);
|
|
EdonRHash(EDONR_MODE, salt_block, EDONR_MODE, salt_block +
|
|
EDONR_MODE / 8);
|
|
|
|
/*
|
|
* Feed the new salt block into the hash function - this will serve
|
|
* as our MAC key.
|
|
*/
|
|
ctx = kmem_zalloc(sizeof (*ctx), KM_SLEEP);
|
|
EdonRInit(ctx, EDONR_MODE);
|
|
EdonRUpdate(ctx, salt_block, sizeof (salt_block) * 8);
|
|
return (ctx);
|
|
}
|
|
|
|
void
|
|
abd_checksum_edonr_tmpl_free(void *ctx_template)
|
|
{
|
|
EdonRState *ctx = ctx_template;
|
|
|
|
bzero(ctx, sizeof (*ctx));
|
|
kmem_free(ctx, sizeof (*ctx));
|
|
}
|