shake256.h File Reference

SHAKE256 extendable-output function (XOF) More...

#include "core/crypto.h"
#include "xof/keccak.h"

Go to the source code of this file.


typedef KeccakContext Shake256Context
 SHAKE256 algorithm context. More...


error_t shake256Compute (const void *input, size_t inputLen, uint8_t *output, size_t outputLen)
 Digest a message using SHAKE256. More...
void shake256Init (Shake256Context *context)
 Initialize SHAKE256 context. More...
void shake256Absorb (Shake256Context *context, const void *input, size_t length)
 Absorb data. More...
void shake256Final (Shake256Context *context)
 Finish absorbing phase. More...
void shake256Squeeze (Shake256Context *context, uint8_t *output, size_t length)
 Extract data from the squeezing phase. More...


const uint8_t shake256Oid [9]

Detailed Description

SHAKE256 extendable-output function (XOF)


SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2019 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneCrypto Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Oryx Embedded SARL (

Definition in file shake256.h.

Typedef Documentation

◆ Shake256Context

SHAKE256 algorithm context.

Definition at line 48 of file shake256.h.

Function Documentation

◆ shake256Absorb()

void shake256Absorb ( Shake256Context context,
const void *  input,
size_t  length 

Absorb data.

[in]contextPointer to the SHAKE256 context
[in]inputPointer to the buffer being hashed
[in]lengthLength of the buffer

Definition at line 106 of file shake256.c.

◆ shake256Compute()

error_t shake256Compute ( const void *  input,
size_t  inputLen,
uint8_t *  output,
size_t  outputLen 

Digest a message using SHAKE256.

[in]inputPointer to the input data
[in]inputLenLength of the input data
[out]outputPointer to the output data
[in]outputLenExpected length of the output data
Error code

Definition at line 60 of file shake256.c.

◆ shake256Final()

void shake256Final ( Shake256Context context)

Finish absorbing phase.

[in]contextPointer to the SHAKE256 context

Definition at line 118 of file shake256.c.

◆ shake256Init()

void shake256Init ( Shake256Context context)

Initialize SHAKE256 context.

[in]contextPointer to the SHAKE256 context to initialize

Definition at line 92 of file shake256.c.

◆ shake256Squeeze()

void shake256Squeeze ( Shake256Context context,
uint8_t *  output,
size_t  length 

Extract data from the squeezing phase.

[in]contextPointer to the SHAKE256 context
[out]outputOutput string
[in]lengthDesired output length, in bytes

Definition at line 132 of file shake256.c.

Variable Documentation

◆ shake256Oid

const uint8_t shake256Oid[9]

Definition at line 48 of file shake256.c.