BGN2/bgn2/inc/PrivateKey.hpp

#ifndef __PRIVATEKEY_HPP
#define __PRIVATEKEY_HPP

#include <unordered_map>

#include "Scalar.hpp"
#include "Bipoint.hpp"
#include "Quadripoint.hpp"
#include "PublicKey.hpp"
#include "pairing.hpp"

class PrivateKey
{
    public:
        Scalar decrypt(const CurveBipoint& ciphertext) const;
        Scalar decrypt(const TwistBipoint& ciphertext) const;
        Scalar decrypt(const Quadripoint & ciphertext) const;
    
    private:
        PrivateKey();
        friend class BGN;
        void set(const PublicKey& pub_key, const Scalar& a1, const Scalar& b1, const Scalar& c1, const Scalar& d1, const Scalar& a2, const Scalar& b2, const Scalar& c2, const Scalar& d2);

        CurveBipoint pi_1(const CurveBipoint& input) const;
        TwistBipoint pi_2(const TwistBipoint& input) const;
        Quadripoint  pi_T(const Quadripoint & input) const;

        Scalar a1, b1, c1, d1, a2, b2, c2, d2;

        CurveBipoint pi_1_curvegen;
        TwistBipoint pi_2_twistgen;
        Quadripoint  pi_T_pairgen;        
};

#endif