(Delphi ActiveX) 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.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
pdf: TChilkatPdf;
success: Integer;
json: TChilkatJsonObject;
cert: TChilkatCert;

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

pdf := TChilkatPdf.Create(Self);

// 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 = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

// Options for signing are specified in JSON.
json := TChilkatJsonObject.Create(Self);

// 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.');

cert := TChilkatCert.Create(Self);

// 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.SmartCardPin := '{ "user":"0000", "3":"12345678" }';

// Use a certificate on an IDPrime MD T=1 smart card.
success := cert.LoadFromSmartcard('');
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// Tell the pdf object to use the certificate for signing.
success := pdf.SetSigningCert(cert.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

success := pdf.SignPdf(json.ControlInterface,'qa_output/hello_signed_hsm.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('The PDF has been successfully cryptographically signed using an HSM.');
end;