Java

Sign a PDF using IDPrime MD T=1 SmartCard

See more PDF Signatures Examples

This example demonstrates how to a sign a PDF using a IDPrime MD T=1 smart card, which requires more specific PIN roles. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkPdf pdf = new CkPdf();

    // Load a PDF to be signed.
    // The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
    success = pdf.LoadFile("qa_data/pdf/hello.pdf");
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    // Options for signing are specified in JSON.
    CkJsonObject json = new CkJsonObject();

    // In most cases, the signingCertificateV2 and signingTime attributes are required.
    json.UpdateInt("signingCertificateV2",1);
    json.UpdateInt("signingTime",1);

    // Put the signature on page 1, top left
    json.UpdateInt("page",1);
    json.UpdateString("appearance.y","top");
    json.UpdateString("appearance.x","left");

    // Use a font scale of 10.0
    json.UpdateString("appearance.fontScale","10.0");

    // In this example, the appearance of the digital signature will contain three lines:
    // 1) The signing certificate's common name
    // 2) The current date/time
    // 3) Some arbitrary text.
    // The keyword "cert_cn" is replaced with the Certificate's Subject Common Name.
    // The keyword "current_dt" is replaced with the current date/time.
    // Any number of appearance text lines can be added.
    json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn");
    json.UpdateString("appearance.text[1]","current_dt");
    json.UpdateString("appearance.text[2]","The crazy brown fox jumps over the lazy dog.");

    CkCert cert = new CkCert();

    // Provide the smart card PIN's for both the "user" and the signing PIN, which is role "3".
    // These PINs may be the same.

    // If the PIN is not explicitly provided here, the Windows OS should
    // display a dialog for the PIN.
    cert.put_SmartCardPin("{ \"user\":\"0000\", \"3\":\"12345678\" }");

    // Use a certificate on an IDPrime MD T=1 smart card.
    success = cert.LoadFromSmartcard("");
    if (success == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    // Tell the pdf object to use the certificate for signing.
    success = pdf.SetSigningCert(cert);
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    success = pdf.SignPdf(json,"qa_output/hello_signed_hsm.pdf");
    if (success == false) {
        System.out.println(pdf.lastErrorText());
        return;
        }

    System.out.println("The PDF has been successfully cryptographically signed using an HSM.");
  }
}