el_gamal_ciphertext.h

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/*
SeComLib
Copyright 2012-2013 TU Delft, Information Security & Privacy Lab (http://isplab.tudelft.nl/)

Contributors:
Inald Lagendijk (R.L.Lagendijk@TUDelft.nl)
Mihai Todor (todormihai@gmail.com)
Thijs Veugen (P.J.M.Veugen@tudelft.nl)
Zekeriya Erkin (z.erkin@tudelft.nl)

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef EL_GAMAL_CIPHERTEXT_HEADER_GUARD
#define EL_GAMAL_CIPHERTEXT_HEADER_GUARD

#include "big_integer.h"

//include C++ headers
#include <memory>
#include <stdexcept>

namespace SeComLib {
namespace Core {
    class ElGamalCiphertext {
    public:
        struct Data {
        public:
            BigInteger x;

            BigInteger y;

            Data ();

            Data (const BigInteger &x, const BigInteger &y);
        };

        Data data;

        ElGamalCiphertext ();

        ElGamalCiphertext (const std::shared_ptr<BigInteger> &encryptionModulus);

        ElGamalCiphertext (const BigInteger &x, const BigInteger &y, const std::shared_ptr<BigInteger> &encryptionModulus);

        ElGamalCiphertext operator- () const;

        ElGamalCiphertext operator+ (const ElGamalCiphertext &input) const;

        ElGamalCiphertext operator- (const ElGamalCiphertext &input) const;

        template <typename T_DataType>
        ElGamalCiphertext operator* (const T_DataType &input) const;

    private:
        std::shared_ptr<BigInteger> encryptionModulus;
    };

}//namespace Core
}//namespace SeComLib

//Separate the implementation from the declaration
#include "el_gamal_ciphertext.hpp"

#endif//EL_GAMAL_CIPHERTEXT_HEADER_GUARD