/*
 * Copyright 2004 - 2013 Wayne Grant
 *           2013 - 2025 Kai Kramer
 *
 * This file is part of KeyStore Explorer.
 *
 * KeyStore Explorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KeyStore Explorer 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KeyStore Explorer.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kse.gui.dialogs;

import java.io.IOException;
import java.util.ResourceBundle;
import java.util.concurrent.CancellationException;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.swing.JFrame;

import org.kse.gui.password.DGetPassword;
import org.kse.gui.passwordmanager.Password;

public class PasswordCallbackHandler implements CallbackHandler {

    private static final ResourceBundle res = ResourceBundle.getBundle("org/kse/gui/dialogs/resources");

    private final JFrame frame;

    public PasswordCallbackHandler(JFrame frame) {
        this.frame = frame;
    }

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

        for (Callback callback : callbacks) {
            if (callback instanceof PasswordCallback) {
                handlePasswordCallback((PasswordCallback) callback);
            } else {
                throw new UnsupportedCallbackException(callback,
                        "Callback not supported " + callback.getClass().getName());
            }
        }
    }

    private void handlePasswordCallback(PasswordCallback passCb) throws UnsupportedCallbackException {

        DGetPassword dGetPassword = new DGetPassword(frame, res.getString("PasswordCallbackHandler.Title"));
        dGetPassword.setLocationRelativeTo(frame);
        dGetPassword.setVisible(true);
        Password password = dGetPassword.getPassword();

        if (password == null) {
            throw new CancellationException("Password Callback canceled by user");
        }

        passCb.setPassword(password.toCharArray());
    }

}
