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/*
* The Skein-512 hash function
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_SKEIN_512_H__
#define BOTAN_SKEIN_512_H__
#include <botan/secmem.h>
#include <botan/hash.h>
#include <string>
namespace Botan {
/**
* Skein-512, a SHA-3 candidate
*/
class BOTAN_DLL Skein_512 : public HashFunction
{
public:
/**
* @param output_bits the output size of Skein in bits
* @param personalization is a string that will paramaterize the
* hash output
*/
Skein_512(size_t output_bits = 512,
const std::string& personalization = "");
size_t hash_block_size() const { return 64; }
size_t output_length() const { return output_bits / 8; }
HashFunction* clone() const;
std::string name() const;
void clear();
private:
void add_data(const byte input[], size_t length);
void final_result(byte out[]);
std::string personalization;
size_t output_bits;
secure_vector<u64bit> H;
secure_vector<u64bit> T;
secure_vector<byte> buffer;
size_t buf_pos;
};
}
#endif
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