private void ClientListener()
{
while (true)
{
//MessageBox.Show("as:"+serverKey);
byte[] buffer = new byte[1024];
ns.Read(buffer, 0, buffer.Length);
string text = Encoding.ASCII.GetString(buffer);
int marker = 0;
for (int i = 1; i < text.Length; i++)
{
if (text[i] == '\0')
{
marker = i;
break;
}
}
if (text[marker] == '\0')
{
text = text.Substring(0, marker);
}
text = CryptoClass.TDESdecodeString(text, serverKey);
PrintMsg(text);
}
}
private void btnConnect_Click(object sender, EventArgs e)
{
try
{
client = new TcpClient();
client.Connect(txtIP.Text, PORT);
ns = client.GetStream();
//sending username
byte[] username = Encoding.ASCII.GetBytes(txtUsername.Text);
//ns.Write(username, 0, username.Length);
//crypto
CryptoClass.GenerateRSAkeys();
byte[] publicKeyBytes = Encoding.ASCII.GetBytes(CryptoClass.GetPublicKey());
byte[] finalPackage = new byte[username.Length + publicKeyBytes.Length + sizeof(int) * 2];
int lastIndex = 0;
Array.Copy(BitConverter.GetBytes(username.Length), finalPackage, sizeof(int));
lastIndex += sizeof(int);
Array.Copy(username, 0, finalPackage, lastIndex, username.Length);
lastIndex += username.Length;
Array.Copy(BitConverter.GetBytes(publicKeyBytes.Length), 0, finalPackage, lastIndex, sizeof(int));
lastIndex += sizeof(int);
Array.Copy(publicKeyBytes, 0, finalPackage, lastIndex, publicKeyBytes.Length);
ns.Write(finalPackage, 0, finalPackage.Length);
byte[] buffer = new byte[1024];
ns.Read(buffer, 0, buffer.Length);
string enServerKey = Encoding.ASCII.GetString(buffer);
int marker = 0;
for (int i = 1; i < enServerKey.Length; i++)
{
if (enServerKey[i] == '\0')
{
marker = i;
break;
}
}
if (enServerKey[marker] == '\0')
{
enServerKey = enServerKey.Substring(0, marker);
}
serverKey = CryptoClass.RSAdecodeString(enServerKey);
// MessageBox.Show(serverKey);
Thread td = new Thread(ClientListener);
td.Start();
PrintMsg("Connected to " + txtIP.Text);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
PrintMsg("Failed connect to server: " + txtIP.Text);
}
}
