101 lines
4.1 KiB
C
Executable file
101 lines
4.1 KiB
C
Executable file
/*
|
|
* This file is a part of Pcompress, a chunked parallel multi-
|
|
* algorithm lossless compression and decompression program.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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/
|
|
*
|
|
*/
|
|
|
|
/*
|
|
The Keccak sponge function, designed by Guido Bertoni, Joan Daemen,
|
|
Michaël Peeters and Gilles Van Assche. For more information, feedback or
|
|
questions, please refer to our website: http://keccak.noekeon.org/
|
|
|
|
Implementation by the designers,
|
|
hereby denoted as "the implementer".
|
|
|
|
To the extent possible under law, the implementer has waived all copyright
|
|
and related or neighboring rights to the source code in this file.
|
|
http://creativecommons.org/publicdomain/zero/1.0/
|
|
*/
|
|
|
|
#ifndef _KeccakSponge_h_
|
|
#define _KeccakSponge_h_
|
|
|
|
#define KeccakPermutationSize 1600
|
|
#define KeccakPermutationSizeInBytes (KeccakPermutationSize/8)
|
|
#define KeccakMaximumRate 1536
|
|
#define KeccakMaximumRateInBytes (KeccakMaximumRate/8)
|
|
|
|
#if defined(__GNUC__)
|
|
#define KECCAK_ALIGN __attribute__ ((aligned(32)))
|
|
#elif defined(_MSC_VER)
|
|
#define KECCAK_ALIGN __declspec(align(32))
|
|
#else
|
|
#define KECCAK_ALIGN
|
|
#endif
|
|
|
|
KECCAK_ALIGN typedef struct spongeStateStruct {
|
|
KECCAK_ALIGN unsigned char state[KeccakPermutationSizeInBytes];
|
|
KECCAK_ALIGN unsigned char dataQueue[KeccakMaximumRateInBytes];
|
|
unsigned int rate;
|
|
unsigned int capacity;
|
|
unsigned int bitsInQueue;
|
|
unsigned int fixedOutputLength;
|
|
int squeezing;
|
|
unsigned int bitsAvailableForSqueezing;
|
|
} spongeState;
|
|
|
|
/**
|
|
* Function to initialize the state of the Keccak[r, c] sponge function.
|
|
* The sponge function is set to the absorbing phase.
|
|
* @param state Pointer to the state of the sponge function to be initialized.
|
|
* @param rate The value of the rate r.
|
|
* @param capacity The value of the capacity c.
|
|
* @pre One must have r+c=1600 and the rate a multiple of 64 bits in this implementation.
|
|
* @return Zero if successful, 1 otherwise.
|
|
*/
|
|
int InitSponge(spongeState *state, unsigned int rate, unsigned int capacity);
|
|
/**
|
|
* Function to give input data for the sponge function to absorb.
|
|
* @param state Pointer to the state of the sponge function initialized by InitSponge().
|
|
* @param data Pointer to the input data.
|
|
* When @a databitLen is not a multiple of 8, the last bits of data must be
|
|
* in the least significant bits of the last byte.
|
|
* @param databitLen The number of input bits provided in the input data.
|
|
* @pre In the previous call to Absorb(), databitLen was a multiple of 8.
|
|
* @pre The sponge function must be in the absorbing phase,
|
|
* i.e., Squeeze() must not have been called before.
|
|
* @return Zero if successful, 1 otherwise.
|
|
*/
|
|
int Absorb(spongeState *state, const unsigned char *data, unsigned long long databitlen);
|
|
/**
|
|
* Function to squeeze output data from the sponge function.
|
|
* If the sponge function was in the absorbing phase, this function
|
|
* switches it to the squeezing phase.
|
|
* @param state Pointer to the state of the sponge function initialized by InitSponge().
|
|
* @param output Pointer to the buffer where to store the output data.
|
|
* @param outputLength The number of output bits desired.
|
|
* It must be a multiple of 8.
|
|
* @return Zero if successful, 1 otherwise.
|
|
*/
|
|
int Squeeze(spongeState *state, unsigned char *output, unsigned long long outputLength);
|
|
|
|
#endif
|