pcompress/crypto/old/sha3_utils_old.c

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/*
* This file is a part of Pcompress, a chunked parallel multi-
* algorithm lossless compression and decompression program.
*
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* Copyright (C) 2012-2013 Moinak Ghosh. All rights reserved.
* Use is subject to license terms.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
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* You should have received a copy of the GNU Lesser General Public
* License along with this program.
* If not, see <http://www.gnu.org/licenses/>.
*
* moinakg@belenix.org, http://moinakg.wordpress.com/
*/
#include <sys/types.h>
#include <KeccakNISTInterface.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if defined(_OPENMP)
#include <omp.h>
#endif
#include <utils.h>
#define KECCAK_BLOCK_SIZE 1024
/*
* Helper functions for single-call SHA3 (Keccak) hashing. Both serial
* and parallel versions are provided.
*/
int
Keccak256_par_old(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{
uchar_t *pos[2];
uint64_t len[2];
uchar_t cksum[2][32];
int i, rv[2];
/*
* Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing.
*/
if (bytes / 2 <= KECCAK_BLOCK_SIZE * 2) {
return (Keccak_Hash(256, buf, bytes * 8, cksum_buf));
}
pos[0] = buf;
len[0] = bytes/2;
pos[1] = buf + bytes/2;
len[1] = bytes - bytes/2;
#if defined(_OPENMP)
# pragma omp parallel for
#endif
for(i = 0; i < 2; ++i)
{
rv[i] = Keccak_Hash(256, pos[i], len[i] * 8, cksum[i]);
}
if (rv[0] != 0 || rv[1] != 0)
return (-1);
return (Keccak_Hash(256, (const BitSequence *)cksum, 2 * 32 * 8, cksum_buf));
}
int
Keccak512_par_old(uchar_t *cksum_buf, uchar_t *buf, uint64_t bytes)
{
uchar_t *pos[2];
uint64_t len[2];
uchar_t cksum[2][64];
int i, rv[2];
/*
* Is it worth doing the overhead of parallelism ? Buffer large enough ?
* If not then just do a simple serial hashing.
*/
if (bytes / 2 <= KECCAK_BLOCK_SIZE * 2) {
return (Keccak_Hash(512, buf, bytes * 8, cksum_buf));
}
pos[0] = buf;
len[0] = bytes/2;
pos[1] = buf + bytes/2;
len[1] = bytes - bytes/2;
#if defined(_OPENMP)
# pragma omp parallel for
#endif
for(i = 0; i < 2; ++i)
{
rv[i] = Keccak_Hash(512, pos[i], len[i] * 8, cksum[i]);
}
if (rv[0] != 0 || rv[1] != 0)
return (-1);
return (Keccak_Hash(512, (const BitSequence *)cksum, 2 * 64 * 8, cksum_buf));
}