private_recommendations_data_packing/comparison_blinding_factor_container.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 COMPARISON_BLINDING_FACTOR_CONTAINER_HEADER_GUARD
#define COMPARISON_BLINDING_FACTOR_CONTAINER_HEADER_GUARD

//include our headers
#include "utils/config.h"
#include "core/big_integer.h"

//include C++ libraries
#include <string>
#include <deque>
#include <stdexcept>

namespace SeComLib {
using namespace Core;

namespace PrivateRecommendationsDataPacking {
    template <typename T_CryptoProvider, typename T_Parameters>
    struct ComparisonBlindingFactorContainer {
    public:
        typedef T_CryptoProvider CryptoProvider;

        typedef T_Parameters Parameters;

        BigInteger r;

        std::deque<BigInteger> ri;

        typename T_CryptoProvider::Ciphertext encryptedR;

        ComparisonBlindingFactorContainer (const T_CryptoProvider &cryptoProvider, const T_Parameters &parameters);
    };

    template <typename T_CryptoProvider>
    class ComparisonBlindingFactorCache {
    public:
        struct BlindingFactorContainer {
        public:
            std::deque<BigInteger> ri;

            typename T_CryptoProvider::Ciphertext encryptedR;

            BlindingFactorContainer (const BigInteger &r, const std::deque<BigInteger> &emptyBuckets, const T_CryptoProvider &cryptoProvider);
        };

        ComparisonBlindingFactorCache (const T_CryptoProvider &cryptoProvider, const size_t bucketSize, const size_t maxPackedBuckets, const std::deque<BigInteger> &emptyBuckets, const std::string &configurationPath);

        ~ComparisonBlindingFactorCache () {}

        const typename ComparisonBlindingFactorCache<T_CryptoProvider>::BlindingFactorContainer &Pop ();

    private:
        std::vector<BlindingFactorContainer> cache;

        const T_CryptoProvider &cryptoProvider;

        unsigned long index;

        unsigned long capacity;

        size_t kappa;

        ComparisonBlindingFactorCache (ComparisonBlindingFactorCache const &);

        ComparisonBlindingFactorCache operator= (ComparisonBlindingFactorCache const &);
    };
}//namespace PrivateRecommendationsDataPacking
}//namespace SeComLib

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

#endif//COMPARISON_BLINDING_FACTOR_CONTAINER_HEADER_GUARD