ServerLoginCallbackHandler.java

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package com.sun.enterprise.security.auth.login.common;

import com.sun.enterprise.security.auth.realm.certificate.CertificateRealm;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.security.auth.callback.*;


/**
 * This is the default callback handler provided by the application
 * client container. The container tries to use the application specified 
 * callback handler (if provided). If there is no callback handler or if
 * the handler cannot be instantiated then this default handler is used.
 */
public class ServerLoginCallbackHandler implements CallbackHandler 
{
    private static final String GP_CB="javax.security.auth.message.callback.GroupPrincipalCallback";
    private static final String GPCBH_UTIL = "com.sun.enterprise.security.jmac.callback.ServerLoginCBHUtil";
    private static final String GPCBH_UTIL_METHOD="processGroupPrincipal";
    private String username = null;
    private String password = null;
    private String moduleID = null;

    public ServerLoginCallbackHandler(String username, String password) {
	this.username = username;
	this.password = password;
    }

    public ServerLoginCallbackHandler(String username, String password, String moduleID) {
	this.username = username;
	this.password = password;
        this.moduleID = moduleID;
    }
    
    public ServerLoginCallbackHandler(){
    }
    
    public void setUsername(String user){
	username = user;
    }
    
    public void setPassword(String pass){
	password = pass;
    }

    public void setModuleID(String moduleID) {
        this.moduleID = moduleID;
    }

    
    /**
     * This is the callback method called when authentication data is
     * required. It either pops up a dialog box to request authentication
     * data or use text input.
     * @param the callback object instances supported by the login module.
     */
    public void handle(Callback[] callbacks) throws IOException,
					UnsupportedCallbackException
    {
	for (int i = 0; i < callbacks.length; i++) {
            if (callbacks[i] instanceof NameCallback){
		NameCallback nme = (NameCallback)callbacks[i];
		nme.setName(username);
	    } else if (callbacks[i] instanceof PasswordCallback){
		PasswordCallback pswd = (PasswordCallback)callbacks[i];
		pswd.setPassword(password.toCharArray());
	    } else if (callbacks[i] instanceof CertificateRealm.AppContextCallback){
                ((CertificateRealm.AppContextCallback) callbacks[i]).setModuleID(moduleID);
            } else if (GP_CB.equals(callbacks[i].getClass().getName())){
                processGroupPrincipal(callbacks[i]);
            } else {
                throw new UnsupportedCallbackException(callbacks[i]);
            }
	}
    }

    private static void processGroupPrincipal(Callback callback) throws UnsupportedCallbackException {
        ClassLoader loader = Thread.currentThread().getContextClassLoader();
        try {
            Class clazz = loader.loadClass(GPCBH_UTIL);
            Method meth = clazz.getMethod(GPCBH_UTIL_METHOD, Callback.class);
            meth.invoke(null, callback);
        } catch (IllegalAccessException ex) {
            throw new UnsupportedCallbackException(callback);
        } catch (IllegalArgumentException ex) {
            throw new UnsupportedCallbackException(callback);
        } catch (InvocationTargetException ex) {
            throw new UnsupportedCallbackException(callback);
        } catch (NoSuchMethodException ex) {
            throw new UnsupportedCallbackException(callback);
        } catch (SecurityException ex) {
            throw new UnsupportedCallbackException(callback);
        } catch (ClassNotFoundException ex) {
             throw new UnsupportedCallbackException(callback);
        }

    }

    
}