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