random_provider_base.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 RANDOM_PROVIDER_BASE_HEADER_GUARD
#define RANDOM_PROVIDER_BASE_HEADER_GUARD

//this header also includes the 3rd party library specific headers
#include "big_integer.h"

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

namespace SeComLib {
namespace Core {
    template <typename T_Impl>
    class RandomProviderBase {
    public:
        friend T_Impl;

        static RandomProviderBase<T_Impl> &GetInstance ();

        BigInteger GetRandomInteger (const size_t numberOfBits);

        BigInteger GetRandomInteger (const BigInteger &maximumValue);

        BigInteger GetMaxLengthRandomPrime (const size_t &numberOfBits);

    private:
        typename T_Impl::RandomGeneratorState randomGeneratorState;

        unsigned int randomSeed;

        RandomProviderBase ();

        ~RandomProviderBase ();

        RandomProviderBase (RandomProviderBase<T_Impl> const &);

        RandomProviderBase operator= (RandomProviderBase<T_Impl> const &);
    };

}//namespace Core
}//namespace SeComLib

//Separate the implementation from the declaration of template methods
#include "random_provider_base.hpp"

#endif//RANDOM_PROVIDER_BASE_HEADER_GUARD