MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

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 {
        PdfEncryptor.encrypt(new PdfReader("1.pdf"), new FileOutputStream("Encrypted2.pdf"), "Hello".getBytes(),
                "World".getBytes(), PdfWriter.AllowDegradedPrinting, PdfWriter.STRENGTH128BITS);

        // decrypt the file

        PdfReader reader = new PdfReader("Encrypted2.pdf", "World".getBytes());
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("Decrypted1.pdf"));
        stamper.close();

        getEncryptionInformation("1.pdf", null);
        getEncryptionInformation("Encrypted2.pdf", "World");
        getEncryptionInformation("Decrypted1.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());
        }
    }

}