java: create pdf password using itextpdf 5.x and bouncycastle Library

		public static void CreatePdfPassword(String fileurl,String userPassWord,String OwnerPassWord)
		{
			try {

	           // OutputStream file = new FileOutputStream(new File(fileurl));

	            document document = new document();
	            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(fileurl));

	            writer.setEncryption(userPassWord.getBytes(), OwnerPassWord.getBytes(),
	                  PdfWriter.ALLOW_PRINTING, PdfWriter.ENCRYPTION_AES_128);
	            //writer.createXmpmetadata();
	            document.open();
	            
	            document.addTitle("涂聚文 PDF");
		        document.addSubject("Using iText");
		        document.addKeywords("Java, PDF, iText");
		        document.addAuthor("geovindu,涂聚文");
		        document.addCreator("geovindu,涂聚文");
		        
		        
	            document.add(new Paragraph("Hello World, iText,涂聚文，你好！你的Java世界！",subFont));
	            document.add(new Paragraph(new Date().toString()));

	            document.close();
	            //file.close();

	        } catch (Exception e) {

	            e.printStackTrace();
	        }
		
	        System.out.println("OK.");
	        
		}