/*
 * Copyright  2003-2004 The Apache Software Foundation.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

/**
 * @author Werner Dittmann (Werner.Dittmann@siemens.com)
 */
package org.apache.ws.axis.oasis;

import org.apache.ws.security.WSPasswordCallback;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;
import java.io.IOException;


/**
 * Class PWCallback
 */
public class PWCallback1 implements CallbackHandler {

    /** Field key */
    private static final byte[] key = {
        (byte) 0x31, (byte) 0xfd, (byte) 0xcb, (byte) 0xda, (byte) 0xfb,
        (byte) 0xcd, (byte) 0x6b, (byte) 0xa8, (byte) 0xe6, (byte) 0x19,
        (byte) 0xa7, (byte) 0xbf, (byte) 0x51, (byte) 0xf7, (byte) 0xc7,
        (byte) 0x3e, (byte) 0x80, (byte) 0xae, (byte) 0x98, (byte) 0x51,
        (byte) 0xc8, (byte) 0x51, (byte) 0x34, (byte) 0x04,

    };


    /*
     * (non-Javadoc)
     * @see javax.security.auth.callback.CallbackHandler#handle(javax.security.auth.callback.Callback[])
     */


    /**
     * Method handle
     * 
     * @param callbacks 
     * @throws java.io.IOException                  
     * @throws javax.security.auth.callback.UnsupportedCallbackException 
     */
    public void handle(Callback[] callbacks)
            throws IOException, UnsupportedCallbackException {

        for (int i = 0; i < callbacks.length; i++) {
            if (callbacks[i] instanceof WSPasswordCallback) {
                WSPasswordCallback pc = (WSPasswordCallback) callbacks[i];

                /*
                 * This usage type is used only in case we received a
                 * username token with a password of type PasswordText or
                 * an unknown password type.
                 * 
                 * This case the WSPasswordCallback object contains the
                 * identifier (aka username), the password we received, and
                 * the password type string to identify the type.
                 * 
                 * Here we perform only a very simple check.
                 */

                if (pc.getUsage() == WSPasswordCallback.USERNAME_TOKEN_UNKNOWN) {
                    if(pc.getIdentifier().equals("Ron") && pc.getPassword().equals("noR")) {
                        return;
                    }
                    if (pc.getPassword().equals("sirhC")) {
                        return;
                    }
                    throw new UnsupportedCallbackException(callbacks[i],
                    "check failed");
                }

                /*
                 * here call a function/method to lookup the password for
                 * the given identifier (e.g. a user name or keystore alias)
                 * e.g.: pc.setPassword(passStore.getPassword(pc.getIdentfifier))
                 * for Testing we supply a fixed name here.
                 */

                if (pc.getUsage() == WSPasswordCallback.KEY_NAME) {
                    pc.setKey(key);
                } else if(pc.getIdentifier().equals("alice")) {
                    pc.setPassword("password");
                } else if(pc.getIdentifier().equals("bob")) {
                    pc.setPassword("password");
                } else if(pc.getIdentifier().equals("Ron")) {
                    pc.setPassword("noR");
                } else {
                    pc.setPassword("sirhC");
                }
            } else {
                throw new UnsupportedCallbackException(callbacks[i],
                        "Unrecognized Callback");
            }
        }
    }
}