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/*******************************************************************************
* Copyright (c) 2003, 2007 s IT Solutions AT Spardat GmbH .
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* s IT Solutions AT Spardat GmbH - initial API and implementation
*******************************************************************************/
/*
* Created on 13.06.2003
*
*
*
*/
package at.spardat.xma.security;
import java.io.InputStream;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.security.auth.callback.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
import at.spardat.xma.boot.logger.LogLevel;
import at.spardat.xma.session.XMASessionClient;
/**
* Generic callback handler.
* This callback handler is passed to every LoginModule which is used as client side authentication plugin.
* It supports NameCallback, PasswordCallback, TextInputCallback, TextOutputCallback, {@link ChallengeCallback}.
* From the callbacks defined in JAAS only LanguageCallback is not supported.
* For every CallengeCallback a server communication is established and the server side
* authentication plugin is asked for a challenge by calling {@link LoginModuleServer#getPreLoginInfo} via the
* {@link at.spardat.xma.session.LoginServlet}.
* All other callbacks are handled with user interface dialog which contains an input field for every callback.
*
* @author s2877
*/
public class XMACallbackHandler implements CallbackHandler, SelectionListener {
private XMASessionClient session;
Callback[] callbacks;
Control[] controls;
Display display;
boolean displayIsNew;
Shell shell;
Button ok,cancel;
Control lastControl;
Image icon;
boolean exitStatus;
/**
* Constructor
* This method is intended to be called only be the XMA runtime.
* @param session the XMA session it belongs to.
*/
public XMACallbackHandler(XMASessionClient session) {
this.session=session;
}
/**
* Handle the callbacks.
* This includes user interaction if callbacks contains any
* NameCallback, PasswordCallback, TextInputCallback or TextOutputCallback.
* It includes server communication if callbacks contains a {@link ChallengeCallback}.
* Other callbacks are not supported.
* @param callbacks the callbacks to handle.
* @throws UnsupportedCallbackException if callbacks contains any unsupported Callback.
*/
public void handle(Callback[] callbacks) throws UnsupportedCallbackException {
if(callbacks.length<=0) return;
this.callbacks=callbacks;
controls = new Control[callbacks.length];
readIn();
if(lastControl!=null) {
exitStatus=false;
openShell();
lastControl=null;
} else {
exitStatus=true;
readBack();
}
if(displayIsNew) {
display.dispose();
}
}
/**
* Creates and initializes the SWT-Shell
*/
private void initShell() {
//todo default locale
//todo migrate to new layout
Locale locale = Locale.getDefault();
ResourceBundle messages = ResourceBundle.getBundle("at.spardat.xma.security.XMACallbackHandler",locale);
display = Display.getCurrent();
if(display==null) {
displayIsNew=true;
display = Display.getDefault();
}
shell = new Shell(display,SWT.DIALOG_TRIM|SWT.RESIZE);
shell.setText(messages.getString("handler"));
InputStream in = this.getClass().getClassLoader().getResourceAsStream("at/spardat/xma/page/imc16x16.gif");
if(in!=null) {
icon = new Image(display, in);
shell.setImage(icon);
shell.addDisposeListener(new DisposeListener(){
public void widgetDisposed(DisposeEvent e) {
icon.dispose();
}
});
}
FormLayout layout = new FormLayout();
layout.marginHeight=10;
layout.marginWidth=10;
shell.setLayout(layout);
}
/**
* Creates and layouts the widgets for all callbacks that need user interaction.
* Calls {@link initShell} if any user interaction in necessary.
* @throws UnsupportedCallbackException if callbacks contains any unknown Callback.
*/
private void readIn() throws UnsupportedCallbackException {
Label label;
Control control=null;
for(int i=0;i-1) {
((Combo)control).select(call.getDefaultChoice());
}
} else if(callbacks[i] instanceof TextOutputCallback) {
if(lastControl==null) { initShell(); }
label=null;
control = new Label(shell,SWT.NONE);
((Label)control).setText(((TextOutputCallback)callbacks[i]).getMessage());
// } else if(callbacks[i] instanceof LanguageCallback) {
// label=null;
// control=null;
} else if(callbacks[i] instanceof ChallengeCallback) {
label=null;
control=null;
} else {
throw new UnsupportedCallbackException(callbacks[i]);
}
if(label!=null) {
FormData data = new FormData();
data.left = new FormAttachment(0,0);
data.top = new FormAttachment(control,0,SWT.CENTER);
label.setLayoutData(data);
}
if(control!=null) {
FormData data = new FormData();
// data.left = new FormAttachment(sep,5,SWT.RIGHT);
data.left = new FormAttachment(35,0);
if(lastControl==null) {
data.top = new FormAttachment(0,0);
} else {
data.top = new FormAttachment(lastControl,5,SWT.BOTTOM);
}
data.right = new FormAttachment(100,0);
data.width=125;
control.setLayoutData(data);
}
controls[i]=control;
if(control!=null) lastControl=control;
}
}
/**
* Open and runs the dialog. This method blocks until the
* dialog is closed by the user.
*/
private void openShell() {
//todo default locale
Locale locale = Locale.getDefault();
ResourceBundle messages = ResourceBundle.getBundle("at.spardat.xma.security.XMACallbackHandler",locale);
ok = new Button (shell, SWT.PUSH);
ok.setText(messages.getString("handler.okW"));
ok.addSelectionListener(this);
cancel = new Button (shell, SWT.PUSH);
cancel.setText(messages.getString("handler.cancelW"));
cancel.addSelectionListener(this);
FormData data = new FormData();
data.width = 60;
data.right = new FormAttachment(cancel,-5,SWT.LEFT);
data.top = new FormAttachment(lastControl,10,SWT.BOTTOM);
ok.setLayoutData(data);
data = new FormData();
data.width = 60;
data.right = new FormAttachment(100,100,0);
data.top = new FormAttachment(lastControl,10,SWT.BOTTOM);
cancel.setLayoutData(data);
shell.setDefaultButton(ok);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
/**
* Writes all the gathered information into the callback-objects.
* Does the server communication for any ChallengeCallback if necessary.
* @throws UnsupportedCallbackException if callbacks contains any unknown Callback.
*/
private void readBack() throws UnsupportedCallbackException {
for(int i=0;i
* true means ok pressed
* false means cancel pressesd
*/
public boolean getExitstatus() {
return exitStatus;
}
}
