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/*
* Streebog
* (C) 2017 Ribose Inc.
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_STREEBOG_H_
#define BOTAN_STREEBOG_H_
#include <botan/hash.h>
namespace Botan {
/**
* Streebog (GOST R 34.11-2012)
* RFC 6986
*/
class Streebog : public HashFunction
{
public:
size_t output_length() const override { return m_output_bits / 8; }
HashFunction* clone() const override { return new Streebog(m_output_bits); }
void clear() override;
std::string name() const override;
size_t hash_block_size() const override { return 64; }
std::unique_ptr<HashFunction> copy_state() const override;
explicit Streebog(size_t output_bits);
protected:
void add_data(const uint8_t input[], size_t length) override;
void final_result(uint8_t out[]) override;
void compress(const uint8_t input[], bool lastblock = false);
void compress_64(const uint64_t input[], bool lastblock = false);
private:
const size_t m_output_bits;
uint64_t m_count;
size_t m_position;
secure_vector<uint8_t> m_buffer;
secure_vector<uint64_t> m_h;
secure_vector<uint64_t> m_S;
};
/**
* Streebog-256
*/
class Streebog_256 final : public Streebog
{
public:
Streebog_256() : Streebog(256) {}
};
/**
* Streebog-512
*/
class Streebog_512 final : public Streebog
{
public:
Streebog_512() : Streebog(512) {}
};
}
#endif
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