private void loginButton_Click(object sender, EventArgs e)
{
loginButton.Enabled = false;
Task.Factory.StartNew(() =>
{
try
{
Program.Session = Session.DoLogin(usernameTextBox.Text, passwordTextBox.Text);
// Login successful
if (rememberMeCheckBox.Checked)
{
var lastLogin = new LastLogin();
lastLogin.Username = usernameTextBox.Text;
lastLogin.Password = passwordTextBox.Text;
LastLogin.SetLastLogin(lastLogin);
}
else
{
if (File.Exists(LastLogin.LastLoginFile))
File.Delete(LastLogin.LastLoginFile);
}
if (this.InvokeRequired)
this.Invoke(new Action(Close));
else
this.Close();
}
catch (UnauthorizedAccessException ex)
{
if (MessageBox.Show(ex.Message + Environment.NewLine +
"Would you like to use offline mode?", "Login Error", MessageBoxButtons.YesNo)
== DialogResult.Yes)
{
Program.Session = new Session(usernameTextBox.Text);
if (this.InvokeRequired)
this.Invoke(new Action(Close));
else
this.Close();
}
else
{
if (loginButton.InvokeRequired)
loginButton.Invoke(new Action(() => loginButton.Enabled = true));
else
loginButton.Enabled = true;
}
}
catch (Exception ex)
{
}
});
}
public static void SetLastLogin(LastLogin login)
{
byte[] decrypted = BitConverter.GetBytes(IPAddress.NetworkToHostOrder((short)login.Username.Length))
.Concat(System.Text.Encoding.UTF8.GetBytes(login.Username))
.Concat(BitConverter.GetBytes(IPAddress.NetworkToHostOrder((short)login.Password.Length)))
.Concat(System.Text.Encoding.UTF8.GetBytes(login.Password)).ToArray();
PKCSKeyGenerator crypto = new PKCSKeyGenerator(LastLoginPassword, LastLoginSalt, 5, 1);
ICryptoTransform cryptoTransform = crypto.Encryptor;
byte[] encrypted = cryptoTransform.TransformFinalBlock(decrypted, 0, decrypted.Length);
if (File.Exists(LastLoginFile))
File.Delete(LastLoginFile);
using (Stream stream = File.Create(LastLoginFile))
stream.Write(encrypted, 0, encrypted.Length);
}
public static void SetLastLogin(LastLogin login)
{
byte[] decrypted = BitConverter.GetBytes(IPAddress.NetworkToHostOrder((short)login.Username.Length))
.Concat(System.Text.Encoding.UTF8.GetBytes(login.Username))
.Concat(BitConverter.GetBytes(IPAddress.NetworkToHostOrder((short)login.Password.Length)))
.Concat(System.Text.Encoding.UTF8.GetBytes(login.Password)).ToArray();
PKCSKeyGenerator crypto = new PKCSKeyGenerator(LastLoginPassword, LastLoginSalt, 5, 1);
ICryptoTransform cryptoTransform = crypto.Encryptor;
byte[] encrypted = cryptoTransform.TransformFinalBlock(decrypted, 0, decrypted.Length);
if (File.Exists(LastLoginFile))
{
File.Delete(LastLoginFile);
}
using (Stream stream = File.Create(LastLoginFile))
stream.Write(encrypted, 0, encrypted.Length);
}
public static LastLogin GetLastLogin(string lastLoginFile)
{
try
{
byte[] encryptedLogin = File.ReadAllBytes(lastLoginFile);
PKCSKeyGenerator crypto = new PKCSKeyGenerator(LastLoginPassword, LastLoginSalt, 5, 1);
ICryptoTransform cryptoTransform = crypto.Decryptor;
byte[] decrypted = cryptoTransform.TransformFinalBlock(encryptedLogin, 0, encryptedLogin.Length);
short userLength = IPAddress.HostToNetworkOrder(BitConverter.ToInt16(decrypted, 0));
byte[] user = decrypted.Skip(2).Take(userLength).ToArray();
byte[] password = decrypted.Skip(4 + userLength).ToArray();
LastLogin result = new LastLogin();
result.Username = System.Text.Encoding.UTF8.GetString(user);
result.Password = System.Text.Encoding.UTF8.GetString(password);
return(result);
}
catch
{
return(null);
}
}
public static LastLogin GetLastLogin(string lastLoginFile)
{
try
{
byte[] encryptedLogin = File.ReadAllBytes(lastLoginFile);
PKCSKeyGenerator crypto = new PKCSKeyGenerator(LastLoginPassword, LastLoginSalt, 5, 1);
ICryptoTransform cryptoTransform = crypto.Decryptor;
byte[] decrypted = cryptoTransform.TransformFinalBlock(encryptedLogin, 0, encryptedLogin.Length);
short userLength = IPAddress.HostToNetworkOrder(BitConverter.ToInt16(decrypted, 0));
byte[] user = decrypted.Skip(2).Take(userLength).ToArray();
byte[] password = decrypted.Skip(4 + userLength).ToArray();
LastLogin result = new LastLogin();
result.Username = System.Text.Encoding.UTF8.GetString(user);
result.Password = System.Text.Encoding.UTF8.GetString(password);
return result;
}
catch
{
return null;
}
}
