diff options
Diffstat (limited to 'uts/common/fs/zfs/sha256.c')
| -rw-r--r-- | uts/common/fs/zfs/sha256.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/uts/common/fs/zfs/sha256.c b/uts/common/fs/zfs/sha256.c new file mode 100644 index 000000000000..f515be6bb304 --- /dev/null +++ b/uts/common/fs/zfs/sha256.c @@ -0,0 +1,50 @@ +/* + * 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://www.opensolaris.org/os/licensing. + * 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 2009 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ +#include <sys/zfs_context.h> +#include <sys/zio.h> +#include <sys/sha2.h> + +void +zio_checksum_SHA256(const void *buf, uint64_t size, zio_cksum_t *zcp) +{ + SHA2_CTX ctx; + zio_cksum_t tmp; + + SHA2Init(SHA256, &ctx); + SHA2Update(&ctx, buf, size); + SHA2Final(&tmp, &ctx); + + /* + * A prior implementation of this function had a + * private SHA256 implementation always wrote things out in + * Big Endian and there wasn't a byteswap variant of it. + * To preseve on disk compatibility we need to force that + * behaviour. + */ + zcp->zc_word[0] = BE_64(tmp.zc_word[0]); + zcp->zc_word[1] = BE_64(tmp.zc_word[1]); + zcp->zc_word[2] = BE_64(tmp.zc_word[2]); + zcp->zc_word[3] = BE_64(tmp.zc_word[3]); +} |