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/*
* Tiger
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_TIGER_H_
#define BOTAN_TIGER_H_
#include <botan/mdx_hash.h>
BOTAN_FUTURE_INTERNAL_HEADER(tiger.h)
namespace Botan {
/**
* Tiger
*/
class BOTAN_PUBLIC_API(2,0) Tiger final : public MDx_HashFunction
{
public:
std::string name() const override;
size_t output_length() const override { return m_hash_len; }
HashFunction* clone() const override
{
return new Tiger(output_length(), m_passes);
}
std::unique_ptr<HashFunction> copy_state() const override;
void clear() override;
/**
* @param out_size specifies the output length; can be 16, 20, or 24
* @param passes to make in the algorithm
*/
Tiger(size_t out_size = 24, size_t passes = 3);
private:
void compress_n(const uint8_t[], size_t block) override;
void copy_out(uint8_t[]) override;
static void pass(uint64_t& A, uint64_t& B, uint64_t& C,
const secure_vector<uint64_t>& M,
uint8_t mul);
static const uint64_t SBOX1[256];
static const uint64_t SBOX2[256];
static const uint64_t SBOX3[256];
static const uint64_t SBOX4[256];
secure_vector<uint64_t> m_X, m_digest;
const size_t m_hash_len, m_passes;
};
}
#endif
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