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/*
* BLAKE2b
* (C) 2016 cynecx
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_BLAKE2B_H_
#define BOTAN_BLAKE2B_H_
#include <botan/hash.h>
#include <string>
#include <memory>
namespace Botan {
/**
* BLAKE2B
*/
class BLAKE2b final : public HashFunction
{
public:
/**
* @param output_bits the output size of BLAKE2b in bits
*/
explicit BLAKE2b(size_t output_bits = 512);
size_t hash_block_size() const override { return 128; }
size_t output_length() const override { return m_output_bits / 8; }
HashFunction* clone() const override;
std::string name() const override;
void clear() override;
std::unique_ptr<HashFunction> copy_state() const override;
private:
void add_data(const uint8_t input[], size_t length) override;
void final_result(uint8_t out[]) override;
void state_init();
void compress(const uint8_t* data, size_t blocks, uint64_t increment);
const size_t m_output_bits;
secure_vector<uint8_t> m_buffer;
size_t m_bufpos;
secure_vector<uint64_t> m_H;
uint64_t m_T[2];
uint64_t m_F[2];
};
typedef BLAKE2b Blake2b;
}
#endif
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