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// tiger.h - originally written and placed in the public domain by Wei Dai
/// \file tiger.h
/// \brief Classes for the Tiger message digest
/// \details Crypto++ provides the original Tiger hash that was
/// submitted to the NESSIE project. The implementation is different
/// from the revised Tiger2 hash.
/// \sa <a href="https://www.cryptopp.com/wiki/Tiger">Tiger</a> and
/// <a href="http://www.cs.technion.ac.il/~biham/Reports/Tiger/">Tiger:
/// A Fast New Cryptographic Hash Function</a>
/// \since Crypto++ 2.1
#ifndef CRYPTOPP_TIGER_H
#define CRYPTOPP_TIGER_H
#include "config.h"
#include "iterhash.h"
// Clang 3.3 integrated assembler crash on Linux. Clang 3.4 due to compiler
// error with .intel_syntax, http://llvm.org/bugs/show_bug.cgi?id=24232
#if CRYPTOPP_BOOL_X32 || defined(CRYPTOPP_DISABLE_MIXED_ASM)
# define CRYPTOPP_DISABLE_TIGER_ASM 1
#endif
NAMESPACE_BEGIN(CryptoPP)
/// \brief Tiger message digest
/// \details Crypto++ provides the original Tiger hash that was
/// submitted to the NESSIE project. The implementation is different
/// from the revised Tiger2 hash.
/// \sa <a href="https://www.cryptopp.com/wiki/Tiger">Tiger</a> and
/// <a href="http://www.cs.technion.ac.il/~biham/Reports/Tiger/">Tiger:
/// A Fast New Cryptographic Hash Function</a>
/// \since Crypto++ 2.1
class Tiger : public IteratedHashWithStaticTransform<word64, LittleEndian, 64, 24, Tiger>
{
public:
CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Tiger";}
std::string AlgorithmProvider() const;
/// \brief Initialize state array
/// \param state the state of the hash
static void InitState(HashWordType *state);
/// \brief Operate the hash
/// \param digest the state of the hash
/// \param data the data to be digested
static void Transform(word64 *digest, const word64 *data);
/// \brief Computes the hash of the current message
/// \param digest a pointer to the buffer to receive the hash
/// \param digestSize the size of the truncated digest, in bytes
/// \details TruncatedFinal() calls Final() and then copies digestSize bytes to digest.
/// The hash is restarted the hash for the next message.
void TruncatedFinal(byte *digest, size_t digestSize);
protected:
static const word64 table[4*256+3];
};
NAMESPACE_END
#endif
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