/*

  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>

  This file is part of GlusterFS.

  This file is licensed to you under your choice of the GNU Lesser

  General Public License, version 3 or any later version (LGPLv3 or

  later), or the GNU General Public License, version 2 (GPLv2), in all

  cases as published by the Free Software Foundation.

*/

#include <openssl/md5.h>

#include <openssl/sha.h>

#include <zlib.h>

#include <stdint.h>

#include <string.h>

/*

 * The "weak" checksum required for the rsync algorithm.

 *

 * Note: these functions are only called to compute checksums on

 * pathnames; they don't need to handle arbitrarily long strings of

 * data. Thus int32_t and uint32_t are sufficient

 */

uint32_t

gf_rsync_weak_checksum(unsigned char *buf, size_t len)

{

    return adler32(0, buf, len);

}

/*

 * The "strong" checksum required for the rsync algorithm.

 */

void

gf_rsync_strong_checksum(unsigned char *data, size_t len,

                         unsigned char *sha256_md)

{

    SHA256((const unsigned char *)data, len, sha256_md);

}

void

gf_rsync_md5_checksum(unsigned char *data, size_t len, unsigned char *md5)

{

    MD5(data, len, md5);

}