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// sha3.h - written and placed in the public domain by Wei Dai
#ifndef CRYPTOPP_SHA3_H
#define CRYPTOPP_SHA3_H
#include "cryptlib.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
/// <a href="http://en.wikipedia.org/wiki/SHA-3">SHA-3</a>
class SHA3 : public HashTransformation
{
public:
SHA3(unsigned int digestSize) : m_digestSize(digestSize) {Restart();}
unsigned int DigestSize() const {return m_digestSize;}
std::string AlgorithmName() const {return "SHA-3-" + IntToString(m_digestSize*8);}
unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word64>();}
void Update(const byte *input, size_t length);
void Restart();
void TruncatedFinal(byte *hash, size_t size);
protected:
inline unsigned int r() const {return 200 - 2 * m_digestSize;}
FixedSizeSecBlock<word64, 25> m_state;
unsigned int m_digestSize, m_counter;
};
class SHA3_224 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 28)
SHA3_224() : SHA3(DIGESTSIZE) {}
static const char * StaticAlgorithmName() {return "SHA-3-224";}
};
class SHA3_256 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
SHA3_256() : SHA3(DIGESTSIZE) {}
static const char * StaticAlgorithmName() {return "SHA-3-256";}
};
class SHA3_384 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 48)
SHA3_384() : SHA3(DIGESTSIZE) {}
static const char * StaticAlgorithmName() {return "SHA-3-384";}
};
class SHA3_512 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 64)
SHA3_512() : SHA3(DIGESTSIZE) {}
static const char * StaticAlgorithmName() {return "SHA-3-512";}
};
NAMESPACE_END
#endif
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