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SHAKE.cpp
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SHAKE.cpp
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/*
* Copyright (C) 2016 Southern Storm Software, Pty Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "SHAKE.h"
/**
* \class SHAKE SHAKE.h <SHAKE.h>
* \brief Abstract base class for the SHAKE Extendable-Output Functions (XOFs).
*
* Reference: http://en.wikipedia.org/wiki/SHA-3
*
* \sa SHAKE256, SHAKE128, SHA3_256
*/
/**
* \brief Constructs a SHAKE object.
*
* \param capacity The capacity of the Keccak sponge function in bits which
* should be a multiple of 64 and between 64 and 1536.
*/
SHAKE::SHAKE(size_t capacity)
: finalized(false)
{
core.setCapacity(capacity);
}
/**
* \brief Destroys this SHAKE object after clearing all sensitive information.
*/
SHAKE::~SHAKE()
{
}
size_t SHAKE::blockSize() const
{
return core.blockSize();
}
void SHAKE::reset()
{
core.reset();
finalized = false;
}
void SHAKE::update(const void *data, size_t len)
{
if (finalized)
reset();
core.update(data, len);
}
void SHAKE::extend(uint8_t *data, size_t len)
{
if (!finalized) {
core.pad(0x1F);
finalized = true;
}
core.extract(data, len);
}
void SHAKE::encrypt(uint8_t *output, const uint8_t *input, size_t len)
{
if (!finalized) {
core.pad(0x1F);
finalized = true;
}
core.encrypt(output, input, len);
}
void SHAKE::clear()
{
core.clear();
finalized = false;
}
/**
* \class SHAKE128 SHAKE.h <SHAKE.h>
* \brief SHAKE Extendable-Output Function (XOF) with 128-bit security.
*
* Reference: http://en.wikipedia.org/wiki/SHA-3
*
* \sa SHAKE256, SHAKE, SHA3_256
*/
/**
* \fn SHAKE128::SHAKE128()
* \brief Constructs a SHAKE object with 128-bit security.
*/
/**
* \brief Destroys this SHAKE128 object after clearing all sensitive
* information.
*/
SHAKE128::~SHAKE128()
{
}
/**
* \class SHAKE256 SHAKE.h <SHAKE.h>
* \brief SHAKE Extendable-Output Function (XOF) with 256-bit security.
*
* Reference: http://en.wikipedia.org/wiki/SHA-3
*
* \sa SHAKE128, SHAKE, SHA3_256
*/
/**
* \fn SHAKE256::SHAKE256()
* \brief Constructs a SHAKE object with 256-bit security.
*/
/**
* \brief Destroys this SHAKE256 object after clearing all sensitive
* information.
*/
SHAKE256::~SHAKE256()
{
}