certviewer.java

JAVA开源LDAP浏览器jxplorer的源码!

        saveButton.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e) { saveCert(); }
        });

        loadButton.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e) { loadCert(); }
        });

        // if we've started up with a null cert, fire up the load
        // cert window immediately.

        if (cert == null && (mode & VIEW_LOAD)>0)
            loadCert();
    }

    /**
     *    This is a bit heavyhanded - when the cert changes,
     *    tear down everything and recreate all the gui objects
     *    in the tab pane.  Better would be to charge off and
     *    update all the individual components, but right now
     *    I'm in a bit of a hurry :-)  - CB
     *    @param displayCert the new cert to display.
     */

    public void displayCert(X509Certificate displayCert)
    {
        cert = displayCert;

        tabs.removeAll();
        generalView = new CertGeneralViewPanel(displayCert);
        detailsView = new CertDetailsViewPanel(displayCert);
        pathView = new CertPathViewPanel(displayCert);
        tabs.add("General", generalView);
        tabs.add("Details", detailsView);
        tabs.add("Certification Path", pathView);

        display.removeAll();
        makeHeavy();
        display.add(tabs);
    }


    /**
     *  When the user hits 'cancel', the window is shut down,
     *  and the cert is set to null (for the benefit of anyone
     *  using this as a cert loader).
     */

    public void doCancel()
    {
        cert = null;
        super.doCancel();
    }

    /**
     *    Returns the certificate currently being viewed by the CertViewer.
     *    @return the current certificate (may be null).
     */

    public X509Certificate getCertificate() { return cert; }

    /**
     *    Returns the file name (if any) associated with the currently viewed
     *    cert.
     *    @return the full file name
     */

    public String getFileName() { return fileName; }

    /**
     *    This method prompts the user to select a file name to save the cert to.
     */

    protected void saveCert()
    {
        JFileChooser chooser = new JFileChooser(properties.getProperty("cert.homeDir", System.getProperty("user.dir")));

        chooser.addChoosableFileFilter(new CBFileFilter(new String[] {"der", "pem"}, CBIntText.get("Certificate File") + " (*.der) (*.pem)"));

        int option = chooser.showSaveDialog(this);

        File readFile = chooser.getSelectedFile();
        if (option != JFileChooser.APPROVE_OPTION || readFile == null) // only do something if user chose 'ok'
        {
            return;  // user picked 'cancel' or didn't select a file.
        }

        if (properties != null)
            properties.setProperty("cert.homeDir", readFile.getParent());

        fileName = readFile.toString();

        try
        {
            byte[] derout = cert.getEncoded();

            if (fileName.toLowerCase().endsWith(".pem")) // special handling for PEM files
            {
//System.out.println("saving pem cert!!!");
                derout = CBSecurity.convertToPEMCertificate(derout);
            }
            else if (fileName.toLowerCase().endsWith(".der") == false)
            {
                fileName = fileName + ".der";
                readFile = new File(fileName);
            }

            if (saveFileCheck(readFile) == false) return;  // something wrong with the file name

            FileOutputStream fos = new FileOutputStream(readFile);
//System.out.println("writeing: " + derout.length + " bytes");
            fos.write(derout);
            fos.close();
        }
        catch (Exception ex)
        {
            CBUtility.error(CBIntText.get("Unable to save Certificate."), ex);
        }
    }

    /**
     *    Checks a file before saving it.
     */

    public boolean saveFileCheck(File checkMe)
    {
        if (checkMe.isDirectory())
        {
            CBUtility.error(checkMe.toString() + " is a directory.", null);
            return false;
        }
        else if (checkMe.exists())
        {
            int saveAnswer = JOptionPane.showConfirmDialog(owner,
                (checkMe.toString() + "\n " + CBIntText.get("This file already exists.\nDo you want to overwrite this file?")),
                "Question", JOptionPane.OK_CANCEL_OPTION);

            return (saveAnswer == JOptionPane.OK_OPTION);
        }

        return true;
    }


    protected void loadCert()
    {
        String browseDir = System.getProperty("user.dir");
        if (properties != null)
        {
            if (properties.getProperty("cert.homeDir") != null)
                browseDir = properties.getProperty("cert.homeDir");
        }
        JFileChooser chooser = new JFileChooser(browseDir);

        chooser.addChoosableFileFilter(new CBFileFilter(new String[] {"der", "pem"}, CBIntText.get("Certificate File") + " (*.der), (*.pem)"));

        int option = chooser.showOpenDialog(this);

        File readFile = chooser.getSelectedFile();

        if (option != JFileChooser.APPROVE_OPTION || readFile == null) // only do something if user chose 'ok'
        {    // user picked 'cancel' or didn't select a file.
            if (cert == null)
                doCancel();  // quit out - we have nothing to display.
            return;
        }

        try
        {
            if (properties != null)
                properties.setProperty("cert.homeDir", readFile.getParent());

//Obsolete - use Sun code
//XXX - don't use Sun code - it doesn't handle plain text prefix in pem file correctly.
            byte[] data = getDERCertDataFromFile(readFile);

//Obsolete - use Sun code
//XXX - don't use Sun code - it doesn't handle plain text prefix in pem file correctly.
            X509Certificate newCert = CertUtil.loadX509Certificate(data);

/* Sun code
System.out.println("using new code");
            X509Certificate newCert = CertUtil.loadX509Certificate(readFile);
*/
            displayCert(newCert);
            fileName = readFile.getName();
        }
        catch (Exception ex)
        {
            CBUtility.error(CBIntText.get("Unable to load Certificate."), ex);
        }

    }



	/**
	 * Attempt to retrieve the most significant name in a distinguish name
	 * ????? (cn = somename)
	 */
	public static String getMostSignificantName(String dnstring)
	{
		String leftmostname = null;
		StringTokenizer stok = new StringTokenizer(dnstring, ",");
		if (stok.hasMoreTokens()) leftmostname = stok.nextToken();
		return leftmostname;
	}


    /**
     *    This takes a file, and converts the certificate data within it into
     *    a byte array.  While this is straightforward if it is DER encoded,
     *    some parsing is required if it is PEM to identify the certificate
     *    portion of the text, and convert it into raw DER bytes.
     *
     *    @param file the file containing an X509 certificate in DER or PEM form
     *    @return the raw (DER) byte data.
     */

    public static byte[] getDERCertDataFromFile(File file)
        throws CertificateParsingException, FileNotFoundException, IOException
    {
         /* Read the file data into a byte array */
        FileInputStream in = new FileInputStream(file);
        byte [] buffer = new byte[(int) (file.length())];
        in.read(buffer);
        in.close();

        /* check if this is pem base64 encoded data - if it is, translate it */
        if (CBSecurity.isPEM(buffer))
        {
            //XXX <your code to handle unencrypted private keys here> XXX//

//System.out.println("\nparsing PEM data!!\n");

            byte[] pemData = CBSecurity.convertFromPEMCertificate(buffer);
            if (pemData == null)
                throw new CertificateParsingException("Unable to parse PEM encoded cert - invalid PEM encoding.");

            buffer = pemData;
        }

        return buffer;
    }


    /**
     * Main method, the starting point of this program.
     */
    public static void main(String[] args)
    {
        JFrame parent = new JFrame();
        //parent.setIconImage(frameIcon);

        X509Certificate cert = null;

        try
        {
            byte[] data = getDERCertDataFromFile(new File(args[0]));

            if ( (cert = CertUtil.loadX509Certificate(data)) == null )
            {
                System.out.println("Problem opening certfile \"" + args[0] + "\"");
                System.exit(1);
            }


            String localDir = System.getProperty("user.dir") + File.separator;

            Properties props = new Properties();

            /*
             *    This sets the directory that the file browsers start in.
             *    This can be saved/read from file to allow the user to start
             *    loading/saving from the same place.
             */

            props.setProperty("cert.homeDir", localDir + "certs" + File.separator);

            /*
             *    This simply sets the directory where the GUI will try to load
             *    its button images from.
             */

            props.setProperty("dir.images", localDir + "images" + File.separator);

            CertViewer.setProperties(props);

            CertViewer me = new CertViewer(parent, cert);

            me.addWindowListener(new WindowAdapter()
            {
                public void windowClosing(WindowEvent e)
                {
                    System.exit(0);
                }
            });

            me.setVisible(true);
        }
        catch (Exception e)
        {
            System.err.println("ERROR OCCURRED");
            e.printStackTrace();
            System.exit(-1);
        }
        // look and feel

    }

}