private static void DoAccept(IAsyncResult res)
{
s = (Socket)res.AsyncState;
c = s.EndAccept(res);
s.BeginAccept(new AsyncCallback(DoAccept), s);
SocketObject sObject = new SocketObject {
clientSocket = c
};
ipendp = (IPEndPoint)c.RemoteEndPoint;
Console.WriteLine(ipendp.Address + " --CONNECT--");
/* öffentlicher Schlüssel wird serialisiert und verschickt */
XmlSerializer xml_ser = new XmlSerializer(typeof(KeyStruct));
MemoryStream str = new MemoryStream();
xml_ser.Serialize(str, publicKey);
buffer = str.ToArray();
c.BeginSend(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(DoSend), c);
str.Close();
/* Nachrichten werden empfangen */
sObject.buffer = new byte[4096];
c.BeginReceive(sObject.buffer, 0, 4096, SocketFlags.None, new AsyncCallback(DoReceive), sObject);
}
private static void DoReceive(IAsyncResult res)
{
try
{
SocketObject sObject = (SocketObject)res.AsyncState;
sObject.clientSocket.EndReceive(res);
XmlSerializer xml_ser = new XmlSerializer(typeof(KeyStruct));
MemoryStream str = new MemoryStream(sObject.buffer);
/* Objekt deserialisieren und entschlüsseln */
Console.WriteLine(ipendp.Address + " " + ElGamalDecrypt((KeyStruct)xml_ser.Deserialize(str), privateKey));
str.Close();
/* Wiederholen des Receive-Vorgangs */
sObject.buffer = new byte[4096];
sObject.clientSocket.BeginReceive(sObject.buffer, 0, 4096, SocketFlags.None, new AsyncCallback(DoReceive), sObject);
}
catch (Exception)
{
Console.WriteLine(ipendp.Address + " --DISCONNECT--\n");
}
}
