package net.ensode.pdfunlock;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfEncryptor;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;

public class PdfUnlock
{
  public static void main(String[] args)
  {
    if (args.length < 2)
    {
      System.err
          .println("usage: java net.ensode.pdfunlock.PdfUnlock inputfile.pdf outputfile.pdf");
    }
    else
    {
      new PdfUnlock().unlockPdf(args[0], args[1]);
    }
  }

  private void unlockPdf(String inputFile, String outputFile)
  {

    try
    {
      PdfReader reader = new PdfReader(inputFile);
      PdfEncryptor.encrypt(reader, new FileOutputStream(outputFile), null,
          null, PdfWriter.AllowAssembly | PdfWriter.AllowCopy
              | PdfWriter.AllowDegradedPrinting | PdfWriter.AllowFillIn
              | PdfWriter.AllowModifyAnnotations | PdfWriter.AllowModifyContents
              | PdfWriter.AllowPrinting | PdfWriter.AllowScreenReaders, false);
    }
    catch (FileNotFoundException e)
    {
      e.printStackTrace();
    }
    catch (IOException e)
    {
      e.printStackTrace();
    }
    catch (DocumentException e)
    {
      e.printStackTrace();
    }
  }
}