net.sf.portecle.gui.crypto.DViewPEM.java Source code

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Here is the source code for net.sf.portecle.gui.crypto.DViewPEM.java

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/*
 * DViewPEM.java
 * This file is part of Portecle, a multipurpose keystore and certificate tool.
 *
 * Copyright  2004 Wayne Grant, waynedgrant@hotmail.com
 *             2006-2014 Ville Skytt, ville.skytta@iki.fi
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package net.sf.portecle.gui.crypto;

import static net.sf.portecle.FPortecle.RB;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.StringWriter;
import java.text.MessageFormat;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;
import javax.swing.border.EmptyBorder;

import net.sf.portecle.PortecleJDialog;
import net.sf.portecle.crypto.CryptoException;
import net.sf.portecle.gui.error.DThrowable;

import org.bouncycastle.openssl.jcajce.JcaPEMWriter;

/**
 * Modal dialog to display an X.509 object's PEM encoding.
 */
public class DViewPEM extends PortecleJDialog {
    /** Stores object to display */
    private final Object m_object;

    /** Stores PEM encoding */
    private String m_pem;

    /** File chooser for saving the PEM encoded object */
    private final JFileChooser m_chooser;

    /**
     * Creates new DViewPEM dialog.
     * 
     * @param parent Parent window
     * @param sTitle The dialog title
     * @param obj Object to display encoding for
     * @param chooser File chooser for saving the PEM encoding
     * @throws CryptoException A problem was encountered getting the object's PEM encoding
     */
    public DViewPEM(Window parent, String sTitle, Object obj, JFileChooser chooser) throws CryptoException {
        super(parent, sTitle, true);
        m_object = obj;
        m_chooser = chooser;
        initComponents();
    }

    /**
     * Initialize the dialog's GUI components.
     * 
     * @throws CryptoException A problem was encountered getting the object's PEM encoding
     */
    private void initComponents() throws CryptoException {
        if (m_pem == null) {
            StringWriter encoded = new StringWriter();
            try (JcaPEMWriter pw = new JcaPEMWriter(encoded)) {
                pw.writeObject(m_object);
            } catch (IOException e) {
                throw new CryptoException(RB.getString("DViewPEM.exception.message"), e);
            }
            m_pem = encoded.toString();
        }

        JPanel jpButtons = new JPanel(new FlowLayout(FlowLayout.CENTER));

        JButton jbOK = getOkButton(true);

        final JButton jbSave = new JButton(RB.getString("DViewPEM.jbSave.text"));
        jbSave.setMnemonic(RB.getString("DViewPEM.jbSave.mnemonic").charAt(0));
        if (m_chooser == null || m_pem == null) {
            jbSave.setEnabled(false);
        } else {
            jbSave.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent evt) {
                    savePressed();
                }
            });
        }

        jpButtons.add(jbOK);
        jpButtons.add(jbSave);

        JPanel jpPEM = new JPanel(new BorderLayout());
        jpPEM.setBorder(new EmptyBorder(5, 5, 5, 5));

        // Load text area with the PEM encoding
        JTextArea jtaPEM = new JTextArea(m_pem);
        jtaPEM.setCaretPosition(0);
        jtaPEM.setEditable(false);
        jtaPEM.setFont(new Font(Font.MONOSPACED, Font.PLAIN, jtaPEM.getFont().getSize()));

        JScrollPane jspPEM = new JScrollPane(jtaPEM, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
        jspPEM.setPreferredSize(new Dimension(500, 300));
        jpPEM.add(jspPEM, BorderLayout.CENTER);

        getContentPane().add(jpPEM, BorderLayout.CENTER);
        getContentPane().add(jpButtons, BorderLayout.SOUTH);

        getRootPane().setDefaultButton(jbOK);

        initDialog();

        setResizable(true);
        jbOK.requestFocusInWindow();
    }

    /**
     * Save button pressed or otherwise activated.
     */
    private void savePressed() {
        int iRtnValue = m_chooser.showDialog(this, RB.getString("DViewPEM.jbSave.text"));
        if (iRtnValue == JFileChooser.APPROVE_OPTION) {
            File fExportFile = m_chooser.getSelectedFile();

            if (fExportFile.isFile()) {
                String sMessage = MessageFormat.format(RB.getString("DViewPEM.OverWriteFile.message"),
                        fExportFile.getName());
                int iSelected = JOptionPane.showConfirmDialog(this, sMessage, getTitle(),
                        JOptionPane.YES_NO_OPTION);
                if (iSelected == JOptionPane.NO_OPTION)
                    return;
            }

            try (FileWriter fw = new FileWriter(fExportFile)) {
                fw.write(m_pem);
            } catch (FileNotFoundException ex) {
                String sMessage = MessageFormat.format(RB.getString("DViewPEM.NoWriteFile.message"),
                        fExportFile.getName());
                JOptionPane.showMessageDialog(this, sMessage, getTitle(), JOptionPane.WARNING_MESSAGE);
            } catch (IOException e) {
                DThrowable.showAndWait(this, null, e);
            }
        }
    }
}