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server.cpp
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server.cpp
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//
// Homomorphic encryption server
// server in C++
// Binds REP socket to tcp://127.0.0.1:5555
// @author: Miroslav Puskaric https://github.com/mpuskaric
#include <zmq.hpp>
#include <string>
#include <iostream>
#include "utils.h"
#include "server.h"
#ifndef _WIN32
#include <unistd.h>
#else
#include <windows.h>
#define sleep(n) Sleep(n)
#endif
int main () {
//OpenFHE
CC cc;
Public_Key PKey;
Eval_Key MKey;
CT ctext, res;
std::vector<double> x2 = {0.25, 0.5, 0.75, 1.0, 2.0, 3.0, 4.0};
std::cout << " Server vector: " << x2 << std::endl;
// Prepare our context and socket
zmq::context_t context (2);
zmq::socket_t socket (context, zmq::socket_type::rep);
socket.bind(server_1);
while (true) {
Message request;
zmq::message_t incoming;
zmq::message_t outgoing;
std::cout << std::endl << " Listening for incoming connections..." << std::endl;
socket.recv (incoming, zmq::recv_flags::none);
std::memcpy(request.header, incoming.data(), sizeof(request.header));
if (strcmp(request.header, subject(CText)) == 0) //#8
{
std::cout << " Ciphertext received " << std::endl;
ctext = receive_params<CT>(incoming);
// Do some data processing
CT res = multiply(cc, PKey, ctext, x2);
outgoing = prep_message<CT>(Result, res);
socket.send(outgoing, zmq::send_flags::none);
continue;
}
else if (strcmp(request.header, subject(PubKey)) == 0) //#4
{
std::cout << " Public Key received " << std::endl;
PKey = receive_params<Public_Key>(incoming);
std::cout << " Requesting Multiplication Key " << std::endl;
outgoing = header_only(R_MultKey);
socket.send(outgoing, zmq::send_flags::none);
continue;
}
else if (strcmp(request.header, subject(MultKey)) == 0) //#6
{
std::cout << " Multiplication Key received " << std::endl;
receive_multkey(incoming, cc);
std::cout << " Requesting Ciphertext " << std::endl;
outgoing = header_only(R_CText);
socket.send(outgoing, zmq::send_flags::none);
continue;
}
else if (strcmp(request.header, subject(CryptoC)) == 0) //#2
{
std::cout << " Cryptocontext received " << std::endl;
cc = receive_params<CC>(incoming);
cc->ClearEvalMultKeys();
std::cout << " Requesting Public Key " << std::endl;
outgoing = header_only(R_PubKey);
socket.send(outgoing, zmq::send_flags::none);
continue;
}
else
{
std::cout << "Unknown message..." << std::endl;
std::exit(1);
}
}
return 0;
}