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Get Encryption Information

import java.io.FileOutputStream; import com.lowagie.text.pdf.PdfEncryptor; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.PdfStamper; import com.lowagie.text.pdf.PdfWriter; public class MainClass {   public static void main(String[] args) throws Exception {     PdfReader reader = new PdfReader("1.pdf");     PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("Encrypted1.pdf"));     stamper.setEncryption("Hello".getBytes(), "World".getBytes(), PdfWriter.AllowPrinting         | PdfWriter.AllowCopy, PdfWriter.STRENGTH40BITS);     stamper.close();     getEncryptionInformation("1.pdf", null);     getEncryptionInformation("Encrypted1.pdf", "World");   }   public static void getEncryptionInformation(String filename, String ownerpassword)       throws Exception {     PdfReader reader;     if (ownerpassword == null)       reader = new PdfReader(filename);     else       reader = new PdfReader(filename, ownerpassword.getBytes());     System.out.println("Encrypted? " + reader.isEncrypted());     if (reader.isEncrypted()) {       System.out.println("Permissions: "           + PdfEncryptor.getPermissionsVerbose(reader.getPermissions()));       System.out.println("128 bit? " + reader.is128Key());     }   } }