public static int Establish(ref byte[] EncryptionKeyServer, ref byte[] Salt, HenkTcpClient Client, string Password, string UserName, RSAKey RSAKey)
{
try
{
EncryptionKeyServer = Encryption.RSA.Decrypt(Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 1 }, RSAKey.PublicKey), TimeSpan.FromSeconds(TIMESPAN)).Data, RSAKey.PrivateKey);
Client.SetEncryption(Aes.Create(), EncryptionKeyServer);
Salt = Client.WriteAndGetReply(new byte[] { 42, 2 }, TimeSpan.FromSeconds(1)).DecryptedData;
Rfc2898DeriveBytes HashedPassword = new Rfc2898DeriveBytes(Password, Salt, 250000);
byte ValidPassword = Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 3 }, HenkTcp.Encryption.Encrypt(Aes.Create(), HashedPassword.GetBytes(20), EncryptionKeyServer)), TimeSpan.FromSeconds(TIMESPAN)).Data[0];
if (ValidPassword.Equals(1))
{
byte ValidUserName = Client.WriteAndGetReply(CombineBytes(new byte[] { 42, 4 }, AES256.encrypt(UserName, Password, Salt)), TimeSpan.FromSeconds(TIMESPAN)).Data[0];
if (ValidUserName.Equals(1))
{
return(3); //evrything ok
}
else
{
Client.Disconnect(); return(2);
} //UserName already taken
}
else
{
Client.Disconnect(); return(1);
} //Wrong password
}
catch { return(0); }//server did not reply on a message
}
private void _Send(object sender, RoutedEventArgs e)
{
if (Message_TB.Text.Length < 2)
{
return;
}
try
{
if (Message_TB.Text.StartsWith("!"))
{
if (Message_TB.Text.Equals("!leave"))
{
_Client.Disconnect(true);
}
else
{
_Client.DataReceived -= _DataReceived;
Messages_LV.Items.Add(Functions.CreateMessageBox(Connection.SendCommand(Message_TB.Text, _Client, EncryptionKeyServer, Password_PWB.Password, Salt), UserName_TB.Text));
_Client.DataReceived += _DataReceived;
}
}
else
{
byte[] Message = HenkTcp.Encryption.Encrypt(Aes.Create(), Encoding.UTF8.GetBytes(UserName_TB.Text + ":" + Message_TB.Text), EndToEndKey);
if (Message.Length > 1024)
{
_ShowPopup("Message is too long"); return;
}
_Client.Write(Message);
}
Message_TB.Text = string.Empty;
}
catch { _OnDisconnect(null, null); }
}
