CredentialsCallbackHandler.java

/*
 * Copyright 2015 Harald Wellmann
 *
 * 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.
 */
package org.ops4j.pax.exam.spi.security;

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;
import javax.security.sasl.RealmCallback;

/**
 * Callback handler for authenticating a management connection to a remote server.
 * 
 * @author Harald Wellmann
 *
 */
public class CredentialsCallbackHandler implements CallbackHandler {

    private String username;
    private String password;

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

    @Override
    public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
        for (Callback callback : callbacks) {
            if (callback instanceof RealmCallback) {
                RealmCallback realmCallback = (RealmCallback) callback;
                String defaultText = realmCallback.getDefaultText();
                realmCallback.setText(defaultText);
            }
            else if (callback instanceof NameCallback) {
                NameCallback nameCallback = (NameCallback) callback;
                nameCallback.setName(username);
            }
            else if (callback instanceof PasswordCallback) {
                PasswordCallback passwordCallback = (PasswordCallback) callback;
                passwordCallback.setPassword(password.toCharArray());
            }
            else {
                throw new UnsupportedCallbackException(callback);
            }
        }
    }
}