Package com.lowagie.tools.plugins

Source Code of com.lowagie.tools.plugins.Encrypt

/*
* $Id: Encrypt.java 45 2007-05-15 22:02:53Z chammer $
* Copyright (c) 2005-2007 Bruno Lowagie, Carsten Hammer
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/

/*
* This class was originally published under the MPL by Bruno Lowagie
* and Carsten Hammer.
* It was a part of iText, a Java-PDF library. You can now use it under
* the MIT License; for backward compatibility you can also use it under
* the MPL version 1.1: http://www.mozilla.org/MPL/
* A copy of the MPL license is bundled with the source code FYI.
*/

package com.lowagie.tools.plugins;

import java.io.File;
import java.io.FileOutputStream;

import javax.swing.JInternalFrame;
import javax.swing.JOptionPane;

import com.lowagie.text.pdf.PdfEncryptor;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.tools.AbstractTool;
import com.lowagie.tools.arguments.BitsetArgument;
import com.lowagie.tools.arguments.FileArgument;
import com.lowagie.tools.arguments.OptionArgument;
import com.lowagie.tools.arguments.StringArgument;
import com.lowagie.tools.arguments.filters.PdfFilter;

/**
* Allows you to encrypt an existing PDF file.
*/
public class Encrypt extends AbstractTool {

  static {
    addVersion("$Id: Encrypt.java 45 2007-05-15 22:02:53Z chammer $");
  }
    private final static int PERMISSIONS[] = {
      PdfWriter.AllowPrinting,
      PdfWriter.AllowModifyContents,
      PdfWriter.AllowCopy,
      PdfWriter.AllowModifyAnnotations,
      PdfWriter.AllowFillIn,
      PdfWriter.AllowScreenReaders,
      PdfWriter.AllowAssembly,
      PdfWriter.AllowDegradedPrinting};
    private final static String PERMISSION_OPTIONS[] = {
        "AllowPrinting",
      "AllowModifyContents",
      "AllowCopy",
      "AllowModifyAnnotations",
      "AllowFillIn (128 bit only)",
      "AllowScreenReaders (128 bit only)",
      "AllowAssembly (128 bit only)",
      "AllowDegradedPrinting (128 bit only)"
        };

  /**
   * Constructs an Encrypt object.
   */
  public Encrypt() {
    arguments.add(new FileArgument(this, "srcfile", "The file you want to encrypt", false, new PdfFilter()));
    arguments.add(new FileArgument(this, "destfile", "The file to which the encrypted PDF has to be written", true, new PdfFilter()));
    arguments.add(new StringArgument(this, "ownerpassword", "The ownerpassword you want to add to the PDF file", String.class.getName()));
    arguments.add(new StringArgument(this, "userpassword", "The userpassword you want to add to the PDF file", String.class.getName()));
    arguments.add(new BitsetArgument(this, "permissions", "Permissions on the file", PERMISSION_OPTIONS));
    OptionArgument oa = new OptionArgument(this, "strength", "Strength of the encryption");
    oa.addOption("40 bit encryption", "40");
    oa.addOption("128 bit encryption", "128");
    arguments.add(oa);
  }

  /**
   * @see com.lowagie.tools.AbstractTool#createFrame()
   */
  protected void createFrame() {
    internalFrame = new JInternalFrame("Encrypt", true, false, true);
    internalFrame.setSize(300, 80);
    internalFrame.setJMenuBar(getMenubar());
    System.out.println("=== Encrypt OPENED ===");
  }

  /**
   * @see com.lowagie.tools.AbstractTool#execute()
   */
  public void execute() {
    try {
      if (getValue("srcfile") == null) throw new InstantiationException("You need to choose a sourcefile");
      if (getValue("destfile") == null) throw new InstantiationException("You need to choose a destination file");
      int permissions = 0;
      String p = (String)getValue("permissions");
      if (p != null) {
        for (int k = 0; k < p.length(); ++k) {
          permissions |= (p.charAt(k) == '0' ? 0 : PERMISSIONS[k]);
        }
      }
      byte[] userpassword = null;
      if (getValue("userpassword") != null) {
        userpassword = ((String)getValue("userpassword")).getBytes();
      }
      byte[] ownerpassword = null;
      if (getValue("ownerpassword") != null) {
        ownerpassword = ((String)getValue("ownerpassword")).getBytes();
      }
      PdfReader reader = new PdfReader(((File)getValue("srcfile")).getAbsolutePath());
      PdfEncryptor.encrypt(
            reader,
        new FileOutputStream((File)getValue("destfile")),
        userpassword,
        ownerpassword,
        permissions,
        "128".equals(getValue("strength"))
        );
    }
    catch(Exception e) {
          JOptionPane.showMessageDialog(internalFrame,
                e.getMessage(),
                e.getClass().getName(),
                JOptionPane.ERROR_MESSAGE);
            System.err.println(e.getMessage());
    }
  }

    /**
     *
     * @see com.lowagie.tools.AbstractTool#valueHasChanged(com.lowagie.tools.arguments.StringArgument)
     * @param arg StringArgument
     */
    public void valueHasChanged(StringArgument arg) {
    if (internalFrame == null) {
      // if the internal frame is null, the tool was called from the commandline
      return;
    }
    // represent the changes of the argument in the internal frame
  }

    /**
     * Encrypts an existing PDF file.
     *
     * @param args String[]
     */
    public static void main(String[] args) {
      Encrypt tool = new Encrypt();
      if (args.length < 2) {
        System.err.println(tool.getUsage());
      }
      tool.setMainArguments(args);
        tool.execute();
    }

    /**
     *
     * @see com.lowagie.tools.AbstractTool#getDestPathPDF()
     * @throws InstantiationException
     * @return File
     */
    protected File getDestPathPDF() throws InstantiationException {
    return (File)getValue("destfile");
  }

}
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