static void ProoveConn(BigInteger N, BigInteger S)
{
TcpClient proover = new TcpClient("127.0.0.1", 9559);
NetworkStream prooverStream = proover.GetStream();
Console.WriteLine("Connected");
byte[] bytes = new byte[1024];
int length;
BigInteger R, X, Y, e;
for (int i = 0; i < 15; i++)
{
R = Fiat_Shamir.get_R(N);
X = BigInteger.ModPow(R, 2, N);
bytes = new byte[1024];
bytes = Encoding.ASCII.GetBytes(X.ToString());
prooverStream.Write(bytes, 0, bytes.Length);
prooverStream.Flush();
while (!prooverStream.DataAvailable)
{
;
}
bytes = new byte[1024];
length = prooverStream.Read(bytes, 0, bytes.Length);
e = BigInteger.Parse(Encoding.ASCII.GetString(bytes, 0, length));
Y = (R * (BigInteger.Pow(S, (int)e))) % N;
bytes = new byte[1024];
bytes = Encoding.ASCII.GetBytes(Y.ToString());
prooverStream.Write(bytes, 0, bytes.Length);
prooverStream.Flush();
Console.WriteLine("Round {0} done.", i + 1);
}
while (!prooverStream.DataAvailable)
{
;
}
byte[] response = new byte[1];
prooverStream.Read(response, 0, 1);
Console.WriteLine(response[0] == 1 ? "Authentication success" : "Authentication failed\nConnection closed");
byte[] response1 = new byte[128];
response1 = Encoding.ASCII.GetBytes(response[0] == 1 ? "AuthOK": "!AuthOK");
stream.Write(response1, 0, response1.Length);
stream.Flush();
}
static void ServerMode(BigInteger N)
{
TcpListener serverExchange = new TcpListener(IPAddress.Parse("127.0.0.1"), 9559);
serverExchange.Start();
Console.WriteLine(interlocutorUserName + "'s V = " + interlocutorV);
Console.WriteLine("Wait connection...");
TcpClient verifier = serverExchange.AcceptTcpClient();
NetworkStream verifierStream = verifier.GetStream();
Console.WriteLine("Connected");
int success = 0;
byte[] bytes = new byte[1024];
int length;
BigInteger e, X, Y, V = BigInteger.Parse(interlocutorV);
for (int i = 0; i < 15; i++)
{
while (!verifierStream.DataAvailable)
{
;
}
bytes = new byte[1024];
length = verifierStream.Read(bytes, 0, bytes.Length);
X = BigInteger.Parse(Encoding.ASCII.GetString(bytes, 0, length));
e = Fiat_Shamir.get_e();
bytes = new byte[1024];
bytes = Encoding.ASCII.GetBytes(e.ToString());
verifierStream.Write(bytes, 0, bytes.Length);
verifierStream.Flush();
while (!verifierStream.DataAvailable)
{
;
}
bytes = new byte[1024];
length = verifierStream.Read(bytes, 0, bytes.Length);
Y = BigInteger.Parse(Encoding.ASCII.GetString(bytes, 0, length));
if (BigInteger.ModPow(Y, 2, N) == (X * BigInteger.Pow(V, (int)e)) % N)
{
success++;
Console.WriteLine("Round {0} successful!", i + 1);
}
else
{
Console.WriteLine("Round {0} not successful!", i + 1);
}
}
byte s = 0;
if (success == 15)
{
Console.WriteLine("100% succes");
s = 1;
}
else
{
Console.WriteLine("Authentication failed\nConnection closed");
}
verifierStream.Write(new byte[] { s }, 0, 1);
verifierStream.Flush();
}
static void Main(string[] args)
{
byte[] bytes = new byte[1024];
Console.Write("Enter your Name: ");
string name = Console.ReadLine();
client = new TcpClient("127.0.0.1", 9478);
stream = client.GetStream();
int length = stream.Read(bytes, 0, bytes.Length);
BigInteger N = BigInteger.Parse(Encoding.ASCII.GetString(bytes, 0, length));
BigInteger S = Fiat_Shamir.get_S(N);
BigInteger V = BigInteger.ModPow(S, 2, N);
bytes = Encoding.ASCII.GetBytes(name + "$" + V.ToString());
stream.Write(bytes, 0, bytes.Length);
stream.Flush();
bytes = new byte[512];
while (!stream.CanRead)
{
;
}
length = stream.Read(bytes, 0, bytes.Length);
Console.WriteLine(Encoding.ASCII.GetString(bytes, 0, length));
Console.WriteLine("N = " + N);
Console.WriteLine("S = " + S);
Console.WriteLine("V = " + V);
Task Exchange = Task.Run(() => ClientInterface(N));
while (true)
{
while (!stream.CanRead)
{
;
}
bytes = new byte[512];
length = stream.Read(bytes, 0, bytes.Length);
string response = Encoding.ASCII.GetString(bytes, 0, length);
if (response.Contains("has connected"))
{
Console.WriteLine(response);
}
else if (response.Contains("New Request"))
{
string[] newrequest = response.Split('$');
interlocutorUserName = newrequest[1];
interlocutorV = newrequest[2];
Console.WriteLine("You have " + newrequest[0].ToLower() + " " + interlocutorUserName);
Console.WriteLine("Accept request [y/n]?");
}
else if (response.Contains("deny"))
{
Console.WriteLine(response);
}
else if (response == "ready")
{
Console.WriteLine("Trying connect...");
Task newConn = Task.Run(() => ProoveConn(N, S));
}
else //there are all users
{
alluser = response.Split('$');
Console.WriteLine("Select user");
int i = 1;
foreach (var user in alluser)
{
if (user.ToString() != string.Empty)
{
Console.WriteLine(i++ + ") " + user);
}
}
}
}
Console.ReadKey();
client.Close();
}
static void Main(string[] args)
{
TcpClient newclient = null;
NetworkStream stream = null;
string ClientName = string.Empty;
byte[] bytes = new byte[1024];
(BigInteger, BigInteger)PQ = Fiat_Shamir.get_PQ();
BigInteger N = PQ.Item1 * PQ.Item2;
TcpListener server = new TcpListener(IPAddress.Parse("127.0.0.1"), 9478);
server.Start();
Console.WriteLine("Server start...");
Console.WriteLine("N = " + N);
while (true)
{
newclient = server.AcceptTcpClient();
stream = newclient.GetStream();
bytes = Encoding.ASCII.GetBytes(N.ToString());
stream.Write(bytes, 0, bytes.Length);
stream.Flush();
bytes = new byte[1024];
while (!stream.CanRead)
{
;
}
int length = stream.Read(bytes, 0, bytes.Length);
string[] data = Encoding.ASCII.GetString(bytes, 0, length).Split('$');
ClientName = data[0];
BigInteger _V = BigInteger.Parse(data[1]);
Console.WriteLine("[{0}] Client connected", DateTime.Now.ToString());
Connections Currentclient = new Connections {
tcpClient = newclient, clientNetwork = stream, name = ClientName, V = _V
};
bytes = new byte[1024];
bytes = Encoding.ASCII.GetBytes("Welcome");
stream.Write(bytes, 0, bytes.Length);
stream.Flush();
foreach (var client in Clients)
{
stream = client.tcpClient.GetStream();
bytes = Encoding.ASCII.GetBytes(ClientName + " has connected");
stream.Write(bytes, 0, bytes.Length);
stream.Flush();
}
Clients.Add(new Connections {
tcpClient = newclient, clientNetwork = stream, name = ClientName, V = _V
});
Console.WriteLine("[{0}] count of clients = " + Clients.Count, DateTime.Now.ToString());
int i = 1;
foreach (var clent in Clients)
{
Console.WriteLine(i++ + ") " + clent.name);
}
Task th = Task.Run(() => ResponseProccessing(Currentclient));
}
server.Stop();
}