Java

Add a Document Timestamp Signature to an already-signed PDF

See more PDF Signatures Examples

Demonstrates how to add a document timestamp signature to an already-signed PDF.

Note: This example requires Chilkat v9.5.0.99 or greater.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Pdf;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Pdf pdf = new Pdf();

        // Load the PDF that has already been signed.
        try {
            pdf.loadFile("qa_data/pdf/helloWorld_signed.pdf");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        JsonObject json = new JsonObject();

        json.updateBool("invisibleSignature", true);
        json.updateString("subFilter", "/ETSI.RFC3161");

        json.updateBool("timestampToken.enabled", true);

        // In this example, we'll use a free TSA server (timestamp.digicert.com), but you may want to use your own timestamp authority server.
        json.updateString("timestampToken.tsaUrl", "http://timestamp.digicert.com");

        // If the timestamp server requires a username/password, do the following.  Otherwise omit the following few lines of code.
        json.updateString("timestampToken.tsaUsername", "the_tsa_username");
        json.updateString("timestampToken.tsaPassword", "the_tsa_password");

        // When requesting the timestamp token, ask the server to include its certificate in the timestamp token response.
        // This allows for the timestamp server's certificate to be included in the LTV validation (i.e. if the timestamp server
        // has an OCSP URL, then Chilkat will also do the OCSP request for the timestamp server's certificate.)
        json.updateBool("timestampToken.requestTsaCert", true);

        try {
            pdf.signPdf(json, "c:/temp/qa_output/helloWorld_signed_2.pdf");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Successfully added a Document Timestamp Signature to the PDF");
    }
}