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externals/cryptopp/tiger.h

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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