package com.qoppa.sample;

import java.awt.geom.Rectangle2D;
import java.io.FileInputStream;
import java.security.KeyStore;

import com.qoppa.pdf.SigningInformation;
import com.qoppa.pdf.form.SignatureField;
import com.qoppa.pdfSecure.PDFSecure;

public class SignTwice {
	private static final String IN = "C:/mydoc.pdf";
	private static final String KEYSTORE = "C:/keystore.p12";
	private static final String KEYSTORE_PASSWORD = "password";
	private static final String ALIAS = "alias";
	private static final String ALIAS_PASSWORD = "password";
	private static final String OUT = "C:/signedTwice.pdf";
	private static final String KEY = "000000000";

	public static void main (String [] args)
    {
        try
        {
            // Load the document
            PDFSecure pdfDoc = new PDFSecure (IN, null);
            PDFSecure.setKey(KEY);
            
            // Load the keystore that contains the digital id to use in signing
            FileInputStream pkcs12Stream = new FileInputStream (KEYSTORE);
            KeyStore store = KeyStore.getInstance("PKCS12");
            store.load(pkcs12Stream, KEYSTORE_PASSWORD.toCharArray());
            pkcs12Stream.close();
            
            // Create signing information
            SigningInformation signInfo = new SigningInformation (store, ALIAS, ALIAS_PASSWORD);

            // Create signature field on the first page
            Rectangle2D signBounds = new Rectangle2D.Double (36, 36, 144, 48);
            SignatureField signField = pdfDoc.addSignatureField(0, "signature1", signBounds);
            
            // Apply digital signature
            pdfDoc.signDocument(signField, signInfo);
            
            // Save the document & reload the signed document before applying a 2nd signature
            pdfDoc.saveDocument (OUT);
            pdfDoc = new PDFSecure(OUT, null);
            
            // Create another signature field on the first page
            signBounds = new Rectangle2D.Double (36, 100, 144, 48);
            signField = pdfDoc.addSignatureField(0, "signature2", signBounds);
            
            // Apply digital signature
            pdfDoc.signDocument(signField, signInfo);
            
            // Save the document that has been signed twice
            pdfDoc.saveDocument (OUT);
        }
        catch (Throwable t)
        {
            t.printStackTrace();
        }
    }
}