secure_face_recognition_utils/dgk_comparison_server.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 DGK_COMPARISON_SERVER_HEADER_GUARD
#define DGK_COMPARISON_SERVER_HEADER_GUARD

//include our headers
#include "utils/config.h"
#include "core/big_integer.h"
#include "core/random_provider.h"
#include "core/paillier.h"
#include "core/dgk.h"
#include "core/secure_permutation.h"

#include "dgk_comparison_blinding_factor_container.h"
#include "dgk_comparison_blinding_factor_cache_parameters.h"

//include C++ headers
#include <deque>

namespace SeComLib {
using namespace Core;

namespace SecureFaceRecognitionUtils {
    //forward-declare required classes
    class DgkComparisonClient;

    class DgkComparisonServer {
    public:
        DgkComparisonServer (const Paillier &paillierCryptoProvider, const Dgk &dgkCryptoProvider, const std::string &configurationPath);

        ~DgkComparisonServer () {}

        Paillier::Ciphertext ComputeLambda (const std::deque<long> &hatRBits, const BigInteger &s);

        void SetClient (const std::shared_ptr<DgkComparisonClient> & dgkComparisonClient);

    private:
        typedef DgkComparisonBlindingFactorContainer<Dgk, DgkComparisonBlindingFactorCacheParameters> BlindingFactorContainer;

        const Paillier &paillierCryptoProvider;

        const Dgk &dgkCryptoProvider;

        std::weak_ptr<const DgkComparisonClient> dgkComparisonClient;

        size_t l;

        Paillier::Ciphertext encryptedMinusTwoPowL;

        RandomizerCache<BlindingFactorContainer> blindingFactorCache;

        DgkComparisonServer (DgkComparisonServer const &);

        DgkComparisonServer operator= (DgkComparisonServer const &);
    };
}//namespace SecureFaceRecognitionUtils
}//namespace SeComLib

#endif//DGK_COMPARISON_SERVER_HEADER_GUARD