public static List <StatusFile> GetStatusFile()
{
string line;
List <StatusFile> statusFile = new List <StatusFile>();
System.IO.StreamReader sfile = new System.IO.StreamReader("Status.txt");
while ((line = sfile.ReadLine()) != null)
{
StatusFile obj = new StatusFile();
string[] arr = line.Split(',');
obj.Name = arr[0];
obj.Ssn = Convert.ToInt32(arr[1]);
obj.Status = arr[2];
statusFile.Add(obj);
}
sfile.Close();
return(statusFile);
}
static void Main(string[] args)
{
if (args.Length == 2)
{
Socket server = null;
try
{
Int32 port = Convert.ToInt32(args[0]);
IPAddress[] addrs = Dns.GetHostEntry(Dns.GetHostName()).AddressList;
IPAddress add = null;
foreach (IPAddress ipv4 in addrs)
{
if (ipv4.AddressFamily == AddressFamily.InterNetwork)
{
add = ipv4;
}
}
IPAddress localAddr = IPAddress.Parse(add.ToString());
IPEndPoint localEndpoint = new IPEndPoint(localAddr, port);
server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
server.Bind(localEndpoint);
List <StatusFile> statusFile = StatusFile.GetStatusFile();
List <VerifyFile> verifyFile = VerifyFile.GetVerifyFile();
while (true)
{
server.Listen(10);
Socket client = server.Accept();
byte[] type = System.Text.Encoding.ASCII.GetBytes("LA" + "$" + counter.ToString());
client.Send(type);
string privateKey = GenerateKeys(counter);
GenerateKeyForVF(counter);
int i;
try
{
byte[] iData = new byte[128];
string input, output = "";
while ((i = client.Receive(iData)) != 0)
{
input = Decrypt(iData, privateKey);
string[] arr = input.Split('$');
string name = arr[0];
if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(arr[1]))
{
int ssn = Convert.ToInt32(arr[1]);
Console.WriteLine(name);
var contains = statusFile.Find(x => x.Ssn.Equals(ssn) && x.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
if (contains != null)
{
string status = statusFile.Find(x => x.Ssn.Equals(ssn) && x.Name.Equals(name, StringComparison.OrdinalIgnoreCase)).Status;
if (status.Equals("citizen"))
{
int valno = verifyFile.Find(x => x.Ssn.Equals(ssn)).Valno;
bool sendToLA = false;
if (valno.Equals(0))
{
Random rand = new Random();
int valn = rand.Next(10000000, 99999999);
while (true)
{
var vnoPresent = verifyFile.Find(x => x.Valno.Equals(valn));
if (vnoPresent == null)
{
sendToLA = true;
verifyFile.Find(x => x.Ssn.Equals(ssn)).Valno = valn;
string path = "Verify.txt";
using (var stream = new FileStream(path, FileMode.Truncate))
{
using (var writer = new StreamWriter(stream))
{
foreach (VerifyFile v in verifyFile)
{
writer.WriteLine(v.Ssn + "," + v.Valno);
}
}
}
break;
}
valn += 1;
}
}
output = verifyFile.Find(x => x.Ssn.Equals(ssn)).Valno.ToString();
byte[] oData = System.Text.Encoding.ASCII.GetBytes(output);
if (sendToLA)
{
try
{
Socket sla = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
sla.Connect(localAddr, Convert.ToInt32(args[1]));
byte[] outByte = Encoding.ASCII.GetBytes("LA" + "$" + counter.ToString());
sla.Send(outByte);
byte[] buffer = new byte[256];
int k = sla.Receive(buffer);
string statusFromVF = System.Text.Encoding.ASCII.GetString(buffer, 0, k);
if (statusFromVF.StartsWith("VF"))
{
string[] array = statusFromVF.Split('$');
byte[] encrypt = EncryptForSignature(output, Convert.ToInt32(array[1]));
byte[] signature = CreateSignature(encrypt, counter);
sla.Send(encrypt);
sla.Send(signature);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
client.Send(oData);
break;
}
else
{
output = "no";
byte[] oData = System.Text.Encoding.ASCII.GetBytes(output);
client.Send(oData);
break;
}
}
else
{
output = "invalid";
byte[] oData = System.Text.Encoding.ASCII.GetBytes(output);
client.Send(oData);
break;
}
}
}
}
catch (Exception ex)
{
continue;
}
counter++;
client.Close();
}
}
catch (SocketException e)
{
Console.WriteLine("SocketException: {0}", e);
}
finally
{
server.Close();
}
Console.Read();
}
}
