BGN2/bgn2/inc/BGN.hpp

#ifndef __BGN_HPP
#define __BGN_HPP

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

class BGN
{
	public:
		BGN();

		void encrypt(Bipoint<curvepoint_fp_t>& G_element, const Scalar& cleartext) const;
		void encrypt(Bipoint<twistpoint_fp2_t>& H_element, const Scalar& cleartext) const;
		void encrypt(Bipoint<curvepoint_fp_t>& G_element, Bipoint<twistpoint_fp2_t>& H_element, const Scalar& cleartext) const;

		Bipoint<curvepoint_fp_t> homomorphic_addition(const Bipoint<curvepoint_fp_t>& a, const Bipoint<curvepoint_fp_t>& b) const;
		Bipoint<twistpoint_fp2_t> homomorphic_addition(const Bipoint<twistpoint_fp2_t>& a, const Bipoint<twistpoint_fp2_t>& b) const;
		Quadripoint homomorphic_addition(const Quadripoint& a, const Quadripoint& b) const;
		Quadripoint homomorphic_multiplication(const Bipoint<curvepoint_fp_t>& a, const Bipoint<twistpoint_fp2_t>& b) const;

		Scalar decrypt(const Bipoint<curvepoint_fp_t>& ciphertext) const;
        Scalar decrypt(const Bipoint<twistpoint_fp2_t>& ciphertext) const;
        Scalar decrypt(const Quadripoint& ciphertext) const;

        PublicKey get_public_key() const;

	private:
		PublicKey public_key;
		PrivateKey private_key;
};

#endif /* __BGN_HPP */