/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.security.auth.callback;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
import java.security.Principal;
import java.util.Iterator;
import java.util.Map;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.TextInputCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.jboss.security.auth.callback.ByteArrayCallback;
//$Id: AppCallbackHandler.java 67344 2007-11-21 17:23:11Z anil.saldhana@jboss.com $
/**
* JBAS-3109:AppCallbackHandler as the default CallbackHandler in the
* security module
*
* An implementation of the JAAS CallbackHandler interface that
* handles NameCallbacks, PasswordCallback, TextInputCallback
* and the JBoss ByteArrayCallback.
* All JBoss Callbacks must be handled.
* - MapCallback
*
* @see javax.security.auth.callback.CallbackHandler
* @see #handle(Callback[])
*
* @author Scott.Stark@jboss.org
* @author Anil.Saldhana@jboss.org
* @version $Revision: 67344 $
*/
public class AppCallbackHandler implements CallbackHandler
{
private String username;
private char[] password;
private byte[] data;
private String text;
private transient String prompt;
private transient Object credential;
private Map keyValuePair;
/** Whether this handler gets the username/password from the console */
private boolean consoleHandler = false;
public AppCallbackHandler()
{
}
public AppCallbackHandler(String username, char[] password)
{
this.username = username;
this.password = password;
}
public AppCallbackHandler(String username, char[] password, byte[] data)
{
this.username = username;
this.password = password;
this.data = data;
}
public AppCallbackHandler(String username, char[] password, byte[] data, String text)
{
this.username = username;
this.password = password;
this.data = data;
this.text = text;
}
/**
*
* Create a new AppCallbackHandler.
*
* @param isConsoleHandler Denotes whether the input is from
* the console.
*/
public AppCallbackHandler(boolean isConsoleHandler)
{
this.consoleHandler = isConsoleHandler;
}
/**
*
* Create a new AppCallbackHandler.
*
* @param prompt Prompt meaningful to the LoginModule
*/
public AppCallbackHandler(String prompt)
{
this.prompt = prompt;
}
/**
*
* Create a new AppCallbackHandler.
*
* @param mapOfValues Key Value Pair
*/
public AppCallbackHandler(Map mapOfValues)
{
this.keyValuePair = mapOfValues;
}
public void setSecurityInfo(Principal p, Object cred)
{
this.username = p.getName();
this.credential = cred;
}
public String getPrompt()
{
return prompt;
}
public Object getCredential()
{
return credential;
}
public void setCredential(Object credential)
{
this.credential = credential;
}
public void clearCredential()
{
this.credential = null;
}
public void handle(Callback[] callbacks) throws
IOException, UnsupportedCallbackException
{
for (int i = 0; i < callbacks.length; i++)
{
Callback c = callbacks[i];
if( c instanceof NameCallback )
{
NameCallback nc = (NameCallback) c;
String prompt = nc.getPrompt();
if( prompt == null )
prompt = "Enter Username: ";
if(this.consoleHandler)
nc.setName(getUserNameFromConsole(prompt));
else
nc.setName(username);
}
else if( c instanceof PasswordCallback )
{
PasswordCallback pc = (PasswordCallback) c;
String prompt = pc.getPrompt();
if( prompt == null )
prompt = "Enter Password: ";
if(this.consoleHandler)
pc.setPassword(getPasswordFromConsole(prompt));
else
if(this.credential != null && this.password == null)
pc.setPassword(this.getPassword());
else
pc.setPassword(password);
}
else if( c instanceof TextInputCallback )
{
TextInputCallback tc = (TextInputCallback) c;
tc.setText(text);
}
else if( c instanceof ByteArrayCallback )
{
ByteArrayCallback bac = (ByteArrayCallback) c;
bac.setByteArray(data);
}
else if (c instanceof ObjectCallback)
{
ObjectCallback oc = (ObjectCallback) c;
oc.setCredential(credential);
}
else if( c instanceof MapCallback )
{
MapCallback mc = (MapCallback) c;
if(keyValuePair != null && !keyValuePair.isEmpty())
{
Iterator iter = keyValuePair.keySet().iterator();
while(iter.hasNext())
{
Object key = iter.next();
if(key instanceof String == false)
throw new SecurityException("key is not a String");
mc.setInfo((String)key, keyValuePair.get(key));
}
}
}
else
{
throw new UnsupportedCallbackException(c, "Unrecognized Callback");
}
}
}
private String getUserNameFromConsole(String prompt)
{
String uName = "";
System.out.print(prompt);
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
try
{
uName = br.readLine();
}
catch(IOException e)
{
throw new SecurityException("Failed to obtain username, ioe="+e.getMessage());
}
return uName;
}
private char[] getPasswordFromConsole(String prompt)
{
String pwd = "";
//Prompt the user for the username
System.out.print(prompt);
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
try
{
pwd = br.readLine();
}
catch(IOException e)
{
throw new SecurityException("Failed to obtain password, ioe="+e.getMessage());
}
return pwd.toCharArray();
}
/** Try to convert the credential value into a char[] using the
first of the following attempts which succeeds:
1. Check for instanceof char[]
2. Check for instanceof String and then use toCharArray()
3. See if credential has a toCharArray() method and use it
4. Use toString() followed by toCharArray().
@return a char[] representation of the credential.
*/
private char[] getPassword()
{
char[] password = null;
if (credential instanceof char[])
{
password = (char[]) credential;
}
else if (credential instanceof String)
{
String s = (String) credential;
password = s.toCharArray();
}
else
{
try
{
Class[] types = {};
Method m = credential.getClass().getMethod("toCharArray", types);
Object[] args = {};
password = (char[]) m.invoke(credential, args);
}
catch (Exception e)
{
if (credential != null)
{
String s = credential.toString();
password = s.toCharArray();
}
}
}
return password;
}
}