privacy_service_provider.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 PRIVACY_SERVICE_PROVIDER_HEADER_GUARD
#define PRIVACY_SERVICE_PROVIDER_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_multiplication_client.h"

#include "private_recommendations_utils/secure_comparison_client.h"

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

namespace SeComLib {

using namespace Core;
using namespace PrivateRecommendationsUtils;

namespace PrivateRecommendations {
    //forward-declare required classes
    class ServiceProvider;

    class PrivacyServiceProvider {
    public:
        typedef std::deque<std::deque<Paillier::Ciphertext>> EncryptedRatings;

        PrivacyServiceProvider ();

        ~PrivacyServiceProvider () {}

        BigInteger SecureDecryption (const Paillier::Ciphertext &input) const;

        void SetServiceProvider (const std::shared_ptr<const ServiceProvider> &serviceProvider);

        const std::shared_ptr<SecureComparisonClient> &GetSecureComparisonClient () const;

        const std::shared_ptr<SecureMultiplicationClient<Paillier>> &GetSecureMultiplicationClient () const;

        const PaillierPublicKey &GetPaillierPublicKey () const;

        const DgkPublicKey &GetDgkPublicKey () const;

        void DebugPaillierEncryption (const Paillier::Ciphertext &input) const;

    private:
        Paillier paillierCryptoProvider;

        Dgk dgkCryptoProvider;

        std::shared_ptr<const ServiceProvider> serviceProvider;

        std::shared_ptr<SecureComparisonClient> secureComparisonClient;

        std::shared_ptr<SecureMultiplicationClient<Paillier>> secureMultiplicationClient;

        static const std::string configurationPath;

        PrivacyServiceProvider (PrivacyServiceProvider const &);

        PrivacyServiceProvider operator= (PrivacyServiceProvider const &);
    };
}//namespace PrivateRecommendations
}//namespace SeComLib

#endif//PRIVACY_SERVICE_PROVIDER_HEADER_GUARD