libcruft-util/hash/keccak.hpp

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2016-06-20 18:05:30 +10:00
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2016 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __HASH_KECCAK_HPP
#define __HASH_KECCAK_HPP
#include <array>
#include <cstdint>
class keccak {
public:
keccak (unsigned bitrate, unsigned capacity, uint8_t suffix);
void update (const uint8_t *input, size_t len);
void digest (uint8_t *output, size_t len);
private:
void permute (void);
const unsigned m_bitrate;
const unsigned m_capacity;
const uint8_t m_suffix;
size_t m_cursor;
union {
std::array<uint8_t, 200> m_bytes;
uint64_t m_words[5][5];
};
};
void FIPS202_SHAKE128(const uint8_t *input, size_t inputByteLen, uint8_t *output, size_t outputByteLen);
void FIPS202_SHAKE256(const uint8_t *input, size_t inputByteLen, uint8_t *output, size_t outputByteLen);
void FIPS202_SHA3_224(const uint8_t *input, size_t inputByteLen, uint8_t *output);
void FIPS202_SHA3_256(const uint8_t *input, size_t inputByteLen, uint8_t *output);
void FIPS202_SHA3_384(const uint8_t *input, size_t inputByteLen, uint8_t *output);
void FIPS202_SHA3_512(const uint8_t *input, size_t inputByteLen, uint8_t *output);
#endif