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sys/cddl/boot/zfs/skein_zfs.c
- This file was added.
| 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 | |||||
| */ | |||||
| /* | |||||
| * 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); | |||||
| } | |||||