jaasinlinecallbackhandler.java

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/**
 * Copyright (c) 2001 The JA-SIG Collaborative.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the JA-SIG Collaborative
 *    (http://www.jasig.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE JA-SIG COLLABORATIVE "AS IS" AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE JA-SIG COLLABORATIVE OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
package org.jasig.portal.security.provider;


import java.io.IOException;

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.UnsupportedCallbackException;

/**
 * <p>Used by JAAS security provider
 * checks userid and credentials using JAAS.
 *
 * @author Nathan Jacobs
 *
 */
 public class JAASInlineCallbackHandler implements CallbackHandler {

  private String username = null;
  private char [] password = null;

  public JAASInlineCallbackHandler(String username, char [] password) {

    // make a defensive copy
    this.password = (char []) password.clone();

    if( "".equals(username) ) {
      throw new IllegalArgumentException("Username must be non-empty");
    }

    this.username = username;

  }


  public void handle(Callback[] callbacks)
  throws IOException, UnsupportedCallbackException {

    for (int i = 0; i < callbacks.length; i++) {
      if (callbacks[i] instanceof NameCallback) {
        NameCallback nc = (NameCallback)callbacks[i];
        nc.setName(username);
      } else if (callbacks[i] instanceof PasswordCallback) {
        PasswordCallback pc = (PasswordCallback)callbacks[i];
        pc.setPassword(password);
      } else {
        throw new UnsupportedCallbackException (callbacks[i], "Unrecognized Callback");
      }
    }
  }

}