questions.stamppages.CertificationSig.java Source code

Introduction

Here is the source code for questions.stamppages.CertificationSig.java

Source

/*
 * This example was written by Bruno Lowagie, author of the book
 * 'iText in Action' by Manning Publications (ISBN: 1932394796).
 * You can use this example as inspiration for your own applications.
 * The following license applies:
 * http://www.1t3xt.com/about/copyright/index.php?page=MIT
 */

package questions.stamppages;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;

import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfSignatureAppearance;
import com.lowagie.text.pdf.PdfStamper;

public class CertificationSig {

    public static final String KEYSTORE = "resources/questions/.keystore";
    public static final String RESOURCE = "resources/questions/forms/to_be_signed.pdf";
    public static final String RESULT = "results/questions/stamppages/certified_form.pdf";

    public static void main(String[] args) {

        PdfReader reader;
        try {
            KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
            ks.load(new FileInputStream(KEYSTORE), "f00b4r".toCharArray());
            PrivateKey key = (PrivateKey) ks.getKey("foobar", "r4b00f".toCharArray());
            Certificate[] chain = ks.getCertificateChain("foobar");
            reader = new PdfReader(RESOURCE);
            FileOutputStream os = new FileOutputStream(RESULT);
            PdfStamper stamper = PdfStamper.createSignature(reader, os, '\0');
            PdfSignatureAppearance appearance = stamper.getSignatureAppearance();
            appearance.setCrypto(key, chain, null, PdfSignatureAppearance.SELF_SIGNED);
            appearance.setCertificationLevel(PdfSignatureAppearance.CERTIFIED_FORM_FILLING);
            appearance.setReason("It's personal.");
            appearance.setLocation("Foobar");
            appearance.setVisibleSignature("Certifier_Signature");
            stamper.close();
        } catch (KeyStoreException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (CertificateException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (UnrecoverableKeyException e) {
            e.printStackTrace();
        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }
}