privacy_service_provider.cpp

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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.
*/
#include "privacy_service_provider.h"
//avoid circular includes
#include "service_provider.h"

namespace SeComLib {
namespace PrivateRecommendations {
    const std::string PrivacyServiceProvider::configurationPath("PrivateRecommendations");

    PrivacyServiceProvider::PrivacyServiceProvider () {
        this->paillierCryptoProvider.GenerateKeys();

        this->dgkCryptoProvider.GenerateKeys();

        //can't initialize it in the initialization list, because the crypto providers need to generate keys first
        this->secureComparisonClient = std::make_shared<SecureComparisonClient>(this->paillierCryptoProvider, this->dgkCryptoProvider, this->configurationPath);
        this->secureMultiplicationClient = std::make_shared<SecureMultiplicationClient<Paillier>>(this->paillierCryptoProvider);
    }

    BigInteger PrivacyServiceProvider::SecureDecryption (const Paillier::Ciphertext &input) const {
        return this->paillierCryptoProvider.DecryptInteger(input);
    }

    void PrivacyServiceProvider::SetServiceProvider (const std::shared_ptr<const ServiceProvider> &serviceProvider) {
        this->serviceProvider = serviceProvider;
        this->secureComparisonClient->SetServer(serviceProvider->GetSecureComparisonServer());
        this->secureMultiplicationClient->SetServer(serviceProvider->GetSecureMultiplicationServer());
    }

    const std::shared_ptr<SecureComparisonClient> &PrivacyServiceProvider::GetSecureComparisonClient () const {
        return this->secureComparisonClient;
    }

    const std::shared_ptr<SecureMultiplicationClient<Paillier>> &PrivacyServiceProvider::GetSecureMultiplicationClient () const {
        return this->secureMultiplicationClient;
    }

    const PaillierPublicKey &PrivacyServiceProvider::GetPaillierPublicKey () const {
        return this->paillierCryptoProvider.GetPublicKey();
    }

    const DgkPublicKey &PrivacyServiceProvider::GetDgkPublicKey () const {
        return this->dgkCryptoProvider.GetPublicKey();
    }

    void PrivacyServiceProvider::DebugPaillierEncryption (const Paillier::Ciphertext &input) const {
        std::cout << this->paillierCryptoProvider.DecryptInteger(input).ToString(10) << std::endl;
    }

}//namespace PrivateRecommendations
}//namespace SeComLib