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/*
* Poly1305
* (C) 2014 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_MAC_POLY1305_H__
#define BOTAN_MAC_POLY1305_H__
#include <botan/mac.h>
#include <memory>
namespace Botan {
/**
* DJB's Poly1305
* Important note: each key can only be used once
*/
class BOTAN_DLL Poly1305 : public MessageAuthenticationCode
{
public:
std::string name() const override { return "Poly1305"; }
MessageAuthenticationCode* clone() const { return new Poly1305; }
void clear();
size_t output_length() const { return 16; }
Key_Length_Specification key_spec() const
{
return Key_Length_Specification(32);
}
private:
void add_data(const byte[], size_t);
void final_result(byte[]);
void key_schedule(const byte[], size_t);
secure_vector<u64bit> m_poly;
secure_vector<byte> m_buf;
size_t m_buf_pos = 0;
};
}
#endif
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