secure_extremum_selection/client.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 "client.h"
//avoid circular includes
#include "server.h"

namespace SeComLib {
namespace SecureExtremumSelection {
    const std::string Client::configurationPath("SecureExtremumSelection");

    Client::Client () :
        testVectorLength(Utils::Config::GetInstance().GetParameter<size_t>(configurationPath + ".testVectorLength")),
        l(Utils::Config::GetInstance().GetParameter<size_t>(configurationPath + ".l")) {
        this->paillierCryptoProvider.GenerateKeys();

        this->dgkCryptoProvider.GenerateKeys();

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

    void Client::StartSimulation () {
        this->testVector.reserve(this->testVectorLength);
        for (size_t i = 0; i < this->testVectorLength; ++i) {
            this->testVector.emplace_back(this->paillierCryptoProvider.EncryptInteger(RandomProvider::GetInstance().GetRandomInteger(this->l)));
        }

        //debugging
        std::cout << "Test vector:" << std::endl;
        for (size_t i = 0; i < this->testVectorLength; ++i) {
            this->DebugPaillierEncryption(this->testVector[i]);
        }

        Paillier::Ciphertext minimum = this->server->ComputeMinimum(this->testVector);
        Paillier::Ciphertext maximum = this->server->ComputeMaximum(this->testVector);

        //debugging
        std::cout << "Minimum: "; this->DebugPaillierEncryption(minimum);
        std::cout << "Maximum: "; this->DebugPaillierEncryption(maximum);
    }

    void Client::SetServer (const std::shared_ptr<const Server> &server) {
        this->server = server;
        this->secureExtremumSelectionClient->SetServer(server->GetSecureExtremumSelectionServer());
    }

    const std::shared_ptr<SecureExtremumSelectionClient<SecureComparisonServer, SecureComparisonClient>> &Client::GetSecureExtremumSelectionClient () const {
        return this->secureExtremumSelectionClient;
    }

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

}//namespace SecureExtremumSelection
}//namespace SeComLib