/// <summary>
/// Logins the user.
/// </summary>
/// <param name="sender">Source of this event.</param>
/// <param name="e">Arguments of this event.</param>
private void ButtonLogin_Click(object sender, RoutedEventArgs e)
{
UserInfo userInfo;
WindowsImpersonationContext impersonationContext = null;
ISecurityProvider provider;
try
{
// Determine whether we need to try impersonating the user
userInfo = new UserInfo(TextBoxUserName.Text);
// If the application is unable to access the domain, possibly because the local user
// running the application does not have access to domain objects, it's possible that
// the user logging in does have access to the domain. So we attempt to impersonate the
// user logging in to allow authentication to proceed
if (!userInfo.DomainRespondsForUser && TryImpersonate(userInfo.LoginID, TextBoxPassword.Password, out impersonationContext))
{
try
{
// Working around a known issue - DirectorySearcher will often throw
// an exception the first time it is used after impersonating another
// user so we get that out of the way here
userInfo.Initialize();
}
catch (InitializationException)
{
// Exception is expected so we ignore it
}
}
// Initialize the security provider
provider = SecurityProviderUtility.CreateProvider(TextBoxUserName.Text);
// Attempt to authenticate user
if (provider.Authenticate(TextBoxPassword.Password))
{
// Setup security provider for subsequent uses
SecurityProviderCache.CurrentProvider = provider;
ClearErrorMessage();
ExitSuccess = true;
}
else
{
// Verify their password hasn't expired
if (provider.UserData.IsDefined && provider.UserData.PasswordChangeDateTime <= DateTime.UtcNow)
{
// Display password expired message
DisplayErrorMessage(string.Format("Your password has expired. {0} You must change your password to continue.", provider.AuthenticationFailureReason));
m_displayType = DisplayType.ChangePassword;
ManageScreenVisualization();
TextBoxPassword.Password = "";
}
else
{
// Display login failure message
DisplayErrorMessage("The username or password is invalid. " + provider.AuthenticationFailureReason);
if (string.IsNullOrWhiteSpace(TextBoxUserName.Text))
TextBoxUserName.Focus();
else
TextBoxPassword.Focus();
}
}
}
catch (Exception ex)
{
DisplayErrorMessage("Login failed: " + ex.Message);
if (string.IsNullOrWhiteSpace(TextBoxUserName.Text))
TextBoxUserName.Focus();
else
TextBoxPassword.Focus();
}
finally
{
if ((object)impersonationContext != null)
{
impersonationContext.Undo();
impersonationContext.Dispose();
}
}
}
/// <summary>
/// Handles service start event.
/// </summary>
/// <param name="args">Service start arguments.</param>
public virtual void Start(string[] args)
{
string userInput = null;
Arguments arguments = new Arguments(string.Join(" ", args));
if (arguments.Exists("OrderedArg1") && arguments.Exists("restart"))
{
string serviceName = arguments["OrderedArg1"];
if (Common.IsPosixEnvironment)
{
string serviceCommand = FilePath.GetAbsolutePath(serviceName);
try
{
Command.Execute(serviceCommand, "stop");
}
catch (Exception ex)
{
WriteLine("Failed to stop the {0} daemon: {1}\r\n", serviceName, ex.Message);
}
try
{
Command.Execute(serviceCommand, "start");
}
catch (Exception ex)
{
WriteLine("Failed to restart the {0} daemon: {1}\r\n", serviceName, ex.Message);
}
}
else
{
// Attempt to access service controller for the specified Windows service
ServiceController serviceController = ServiceController.GetServices().SingleOrDefault(svc => string.Compare(svc.ServiceName, serviceName, StringComparison.OrdinalIgnoreCase) == 0);
if (serviceController != null)
{
try
{
if (serviceController.Status == ServiceControllerStatus.Running)
{
WriteLine("Attempting to stop the {0} Windows service...", serviceName);
serviceController.Stop();
// Can't wait forever for service to stop, so we time-out after 20 seconds
serviceController.WaitForStatus(ServiceControllerStatus.Stopped, TimeSpan.FromSeconds(20.0D));
if (serviceController.Status == ServiceControllerStatus.Stopped)
WriteLine("Successfully stopped the {0} Windows service.", serviceName);
else
WriteLine("Failed to stop the {0} Windows service after trying for 20 seconds...", serviceName);
// Add an extra line for visual separation of service termination status
WriteLine("");
}
}
catch (Exception ex)
{
WriteLine("Failed to stop the {0} Windows service: {1}\r\n", serviceName, ex.Message);
}
}
// If the service failed to stop or it is installed as stand-alone debug application, we try to forcibly stop any remaining running instances
try
{
Process[] instances = Process.GetProcessesByName(serviceName);
if (instances.Length > 0)
{
int total = 0;
WriteLine("Attempting to stop running instances of the {0}...", serviceName);
// Terminate all instances of service running on the local computer
foreach (Process process in instances)
{
process.Kill();
total++;
}
if (total > 0)
WriteLine("Stopped {0} {1} instance{2}.", total, serviceName, total > 1 ? "s" : "");
// Add an extra line for visual separation of process termination status
WriteLine("");
}
}
catch (Exception ex)
{
WriteLine("Failed to terminate running instances of the {0}: {1}\r\n", serviceName, ex.Message);
}
// Attempt to restart Windows service...
if (serviceController != null)
{
try
{
// Refresh state in case service process was forcibly stopped
serviceController.Refresh();
if (serviceController.Status != ServiceControllerStatus.Running)
serviceController.Start();
}
catch (Exception ex)
{
WriteLine("Failed to restart the {0} Windows service: {1}\r\n", serviceName, ex.Message);
}
}
}
}
else
{
if (arguments.Exists("server"))
{
// Override default settings with user provided input.
m_clientHelper.PersistSettings = false;
m_remotingClient.PersistSettings = false;
m_remotingClient.ConnectionString = string.Format("Server={0}", arguments["server"]);
}
long lastConnectAttempt = 0;
// Connect to service and send commands.
while (!string.Equals(userInput, "Exit", StringComparison.OrdinalIgnoreCase))
{
try
{
// Do not reattempt connection too quickly
while (DateTime.UtcNow.Ticks - lastConnectAttempt < Ticks.PerSecond)
Thread.Sleep(200);
lastConnectAttempt = DateTime.UtcNow.Ticks;
if (!m_authenticationFailure)
{
// If there has been no authentication
// failure, connect normally
Connect();
}
else
{
UserInfo userInfo;
StringBuilder username = new StringBuilder();
StringBuilder password = new StringBuilder();
// If there has been an authentication failure,
// prompt the user for new credentials
PromptForCredentials(username, password);
try
{
// Attempt to set network credentials used when attempting AD authentication
userInfo = new UserInfo(username.ToString());
userInfo.Initialize();
SetNetworkCredential(new NetworkCredential(userInfo.LoginID, password.ToString()));
}
catch
{
// Even if this fails, we can still pass along user credentials
}
Connect(username.ToString(), password.ToString());
}
while (m_authenticated && m_clientHelper.Enabled && !string.Equals(userInput, "Exit", StringComparison.OrdinalIgnoreCase))
{
// Wait for a command from the user.
userInput = System.Console.ReadLine();
// Write a blank line to the console.
WriteLine();
if (!string.IsNullOrWhiteSpace(userInput))
{
// The user typed in a command and didn't just hit <ENTER>.
switch (userInput.ToUpper())
{
case "CLS":
// User wants to clear the console window.
System.Console.Clear();
break;
case "EXIT":
// User wants to exit the telnet session with the service.
if (m_telnetActive)
{
userInput = string.Empty;
m_clientHelper.SendRequest("Telnet -disconnect");
}
break;
case "LOGIN":
m_authenticated = false;
m_authenticationFailure = true;
break;
default:
// User wants to send a request to the service.
m_clientHelper.SendRequest(userInput);
if (string.Compare(userInput, "Help", StringComparison.OrdinalIgnoreCase) == 0)
DisplayHelp();
break;
}
}
}
m_clientHelper.Disconnect();
}
catch (Exception)
{
// Errors during the outer connection loop
// should simply force an attempt to reconnect
m_clientHelper.Disconnect();
}
}
}
}
private static void PrincipalRefreshTimer_Elapsed(object sender, ElapsedEventArgs elapsedEventArgs)
{
UserInfo userInfo;
ISecurityProvider provider;
WindowsImpersonationContext impersonationContext;
if ((object)s_currentPrincipal != null)
{
// If user is no longer authenticated, provider session may have expired so provider session will
// now be reinitialized. This step will "re-validate" user's current state (e.g., locked-out).
if (!SecurityProviderCache.TryGetCachedProvider(s_currentPrincipal.Identity.Name, out provider))
{
impersonationContext = null;
try
{
// Determine whether we need to try impersonating the user
userInfo = new UserInfo(CurrentUser);
// If the application is unable to access the domain, possibly because the local user
// running the application does not have access to domain objects, it's possible that
// the user logging in does have access to the domain. So we attempt to impersonate the
// user logging in to allow authentication to proceed
if (!userInfo.DomainRespondsForUser && TryImpersonate(userInfo.LoginID, GetCurrentUserPassword(), out impersonationContext))
{
try
{
// Working around a known issue - DirectorySearcher will often throw
// an exception the first time it is used after impersonating another
// user so we get that out of the way here
userInfo.Initialize();
}
catch (InitializationException)
{
// Exception is expected so we ignore it
}
}
Thread.CurrentPrincipal = s_currentPrincipal;
SecurityProviderCache.ReauthenticateCurrentPrincipal();
CurrentPrincipal = Thread.CurrentPrincipal as SecurityPrincipal;
}
finally
{
if ((object)impersonationContext != null)
{
impersonationContext.Undo();
impersonationContext.Dispose();
}
}
// Rights may have changed -- notify for revalidation of menu commands
Application.Current.Dispatcher.BeginInvoke(new Action(OnCurrentPrincipalRefreshed));
}
}
s_principalRefreshTimer.Start();
}
