using System;
using System.IO;

using iTextSharp.text;
using iTextSharp.text.pdf;

public class Encrypt {
    
	/**
	* @param args the command line arguments
	*/
	public static void Main(String[] args) {
		if (args.Length != 3) {
			Console.Error.WriteLine("This tools needs 3 parameters:\njava Encrypt srcfile destfile password");
		}
		else {
			try {
				// we create a reader for a certain document
				PdfReader reader = new PdfReader(args[0]);
				// we retrieve the total number of pages
				int n = reader.NumberOfPages;
				Console.WriteLine("There are " + n + " pages in the original file.");
                
				// step 1: creation of a document-object
				Document document = new Document(reader.getPageSizeWithRotation(1));
				// step 2: we create a writer that listens to the document
				PdfWriter writer = PdfWriter.getInstance(document, new FileStream(args[1], FileMode.Create));
				writer.setEncryption(PdfWriter.STRENGTH128BITS, args[2], null, PdfWriter.AllowPrinting);
				// step 3: we open the document
				document.Open();
				PdfContentByte cb = writer.DirectContent;
				PdfImportedPage page;
				int rotation;
				int i = 0;
				// step 4: we add content
				while (i < n) {
					i++;
					document.setPageSize(reader.getPageSizeWithRotation(i));
					document.newPage();
					page = writer.getImportedPage(reader, i);
					rotation = reader.getPageRotation(i);
					if (rotation == 90 || rotation == 270) {
						cb.addTemplate(page, 0, -1f, 1f, 0, 0, reader.getPageSizeWithRotation(i).Height);
					}
					else {
						cb.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
					}
					Console.WriteLine("Processed page " + i);
				}
				// step 5: we close the document
				document.Close();
			}
			catch(Exception e) {
				Console.Error.WriteLine(e.Message);
				Console.Error.WriteLine(e.StackTrace);
			}
		}
	}
    
}