glusterfs

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/*
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  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
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  This file is part of GlusterFS.
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  This file is licensed to you under your choice of the GNU Lesser
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  General Public License, version 3 or any later version (LGPLv3 or
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  later), or the GNU General Public License, version 2 (GPLv2), in all
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  cases as published by the Free Software Foundation.
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*/
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#include <openssl/md5.h>
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#include <openssl/sha.h>
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#include <zlib.h>
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#include <stdint.h>
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#include <string.h>
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/*
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 * The "weak" checksum required for the rsync algorithm.
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 *
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 * Note: these functions are only called to compute checksums on
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 * pathnames; they don't need to handle arbitrarily long strings of
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 * data. Thus int32_t and uint32_t are sufficient
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 */
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uint32_t
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gf_rsync_weak_checksum(unsigned char *buf, size_t len)
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{
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    return adler32(0, buf, len);
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}
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/*
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 * The "strong" checksum required for the rsync algorithm.
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 */
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void
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gf_rsync_strong_checksum(unsigned char *data, size_t len,
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                         unsigned char *sha256_md)
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{
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    SHA256((const unsigned char *)data, len, sha256_md);
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}
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void
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gf_rsync_md5_checksum(unsigned char *data, size_t len, unsigned char *md5)
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{
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    MD5(data, len, md5);
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}
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