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Templated Keccak and SHA3

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templated Keccak and SHA3 to reduce code-size, added a
StaticAlgorithmName() to the base classes and restricted use of
constexpr to this new function in the base classes
This commit is contained in:
DevJPM 2016-09-21 14:16:10 +02:00
parent 54557b1827
commit 70635865a1
2 changed files with 47 additions and 72 deletions
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60
keccak.h
View File

@ -50,12 +50,15 @@ public:
Keccak(unsigned int digestSize) : m_digestSize(digestSize) {Restart();}
unsigned int DigestSize() const {return m_digestSize;}
std::string AlgorithmName() const {return "Keccak-" + IntToString(m_digestSize*8);}
CRYPTOPP_CONSTEXPR static const char* StaticAlgorithmName() { return "Keccak"; }
unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word64>();}
void Update(const byte *input, size_t length);
void Restart();
void TruncatedFinal(byte *hash, size_t size);
//unsigned int BlockSize() const { return r(); } // that's the idea behind it
protected:
inline unsigned int r() const {return 200 - 2 * m_digestSize;}
@ -64,56 +67,41 @@ protected:
};
//! \class Keccak_224
//! \brief Keccak-224 message digest
//! \since Crypto++ 5.6.4
class Keccak_224 : public Keccak
//! \tparam DigestSize controls the digest size as a template parameter instead of a per-class constant
//! \brief Keccak-X message digest, template for more fine-grained typedefs
//! \since Crypto++ 5.7.0
template<unsigned int digestSize>
class Keccak_Final : public Keccak
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 28)
CRYPTOPP_CONSTANT(DIGESTSIZE = digestSize)
CRYPTOPP_CONSTANT(BLOCKSIZE = 200 - 2 * DIGESTSIZE)
//! \brief Construct a Keccak-224 message digest
Keccak_224() : Keccak(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "Keccak-224";}
//! \brief Construct a Keccak-X message digest
Keccak_Final() : Keccak(DIGESTSIZE) {}
static std::string StaticAlgorithmName() { return "Keccak-" + IntToString(DIGESTSIZE * 8); }
unsigned int BlockSize() const { return BLOCKSIZE; }
private:
CRYPTOPP_COMPILE_ASSERT(BLOCKSIZE < 200); // ensure there was no underflow in the math
CRYPTOPP_COMPILE_ASSERT(BLOCKSIZE > DIGESTSIZE); // this is a general expectation by HMAC
};
//! \class Keccak_224
//! \brief Keccak-224 message digest
//! \since Crypto++ 5.6.4
typedef Keccak_Final<28> Keccak_224;
//! \class Keccak_256
//! \brief Keccak-256 message digest
//! \since Crypto++ 5.6.4
class Keccak_256 : public Keccak
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
//! \brief Construct a Keccak-256 message digest
Keccak_256() : Keccak(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "Keccak-256";}
};
typedef Keccak_Final<32> Keccak_256;
//! \class Keccak_384
//! \brief Keccak-384 message digest
//! \since Crypto++ 5.6.4
class Keccak_384 : public Keccak
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 48)
//! \brief Construct a Keccak-384 message digest
Keccak_384() : Keccak(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "Keccak-384";}
};
typedef Keccak_Final<48> Keccak_384;
//! \class Keccak_512
//! \brief Keccak-512 message digest
//! \since Crypto++ 5.6.4
class Keccak_512 : public Keccak
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 64)
//! \brief Construct a Keccak-512 message digest
Keccak_512() : Keccak(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "Keccak-512";}
};
typedef Keccak_Final<64> Keccak_512;
NAMESPACE_END

59
sha3.h
View File

@ -36,12 +36,14 @@ public:
SHA3(unsigned int digestSize) : m_digestSize(digestSize) {Restart();}
unsigned int DigestSize() const {return m_digestSize;}
std::string AlgorithmName() const {return "SHA3-" + IntToString(m_digestSize*8);}
CRYPTOPP_CONSTEXPR static const char* StaticAlgorithmName() { return "SHA3"; }
unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word64>();}
void Update(const byte *input, size_t length);
void Restart();
void TruncatedFinal(byte *hash, size_t size);
// unsigned int BlockSize() const { return r(); } // that's the idea behind it
protected:
inline unsigned int r() const {return 200 - 2 * m_digestSize;}
@ -50,56 +52,41 @@ protected:
};
//! \class SHA3_224
//! \brief SHA3-224 message digest
//! \since Crypto++ 5.6.2
class SHA3_224 : public SHA3
//! \tparam DigestSize controls the digest size as a template parameter instead of a per-class constant
//! \brief SHA3-X message digest, template for more fine-grained typedefs
//! \since Crypto++ 5.7.0
template<unsigned int digestSize>
class SHA3_Final : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 28)
CRYPTOPP_CONSTANT(DIGESTSIZE = digestSize)
CRYPTOPP_CONSTANT(BLOCKSIZE = 200 - 2 * DIGESTSIZE)
//! \brief Construct a SHA3-224 message digest
SHA3_224() : SHA3(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SHA3-224";}
//! \brief Construct a SHA3-X message digest
SHA3_Final() : SHA3(DIGESTSIZE) {}
static std::string StaticAlgorithmName() { return "SHA3-" + IntToString(DIGESTSIZE * 8); }
unsigned int BlockSize() const { return BLOCKSIZE; }
private:
CRYPTOPP_COMPILE_ASSERT(BLOCKSIZE < 200); // ensure there was no underflow in the math
CRYPTOPP_COMPILE_ASSERT(BLOCKSIZE > DIGESTSIZE); // this is a general expectation by HMAC
};
//! \class SHA3_224
//! \brief SHA3-224 message digest
//! \since Crypto++ 5.6.2
typedef SHA3_Final<28> SHA3_224;
//! \class SHA3_256
//! \brief SHA3-256 message digest
//! \since Crypto++ 5.6.2
class SHA3_256 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
//! \brief Construct a SHA3-256 message digest
SHA3_256() : SHA3(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SHA3-256";}
};
typedef SHA3_Final<32> SHA3_256;
//! \class SHA3_384
//! \brief SHA3-384 message digest
//! \since Crypto++ 5.6.2
class SHA3_384 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 48)
//! \brief Construct a SHA3-384 message digest
SHA3_384() : SHA3(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SHA3-384";}
};
typedef SHA3_Final<48> SHA3_384;
//! \class SHA3_512
//! \brief SHA3-512 message digest
//! \since Crypto++ 5.6.2
class SHA3_512 : public SHA3
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 64)
//! \brief Construct a SHA3-512 message digest
SHA3_512() : SHA3(DIGESTSIZE) {}
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "SHA3-512";}
};
typedef SHA3_Final<64> SHA3_512;
NAMESPACE_END