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(Delphi ActiveX) Add a Document Timestamp Signature to an already-signed PDFSee more PDF Signatures ExamplesDemonstrates how to add a document timestamp signature to an already-signed PDF. Note: This example requires Chilkat v9.5.0.99 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_v9_5_0_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var pdf: TChilkatPdf; success: Integer; json: TChilkatJsonObject; begin // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. pdf := TChilkatPdf.Create(Self); // Load the PDF that has already been signed. success := pdf.LoadFile('qa_data/pdf/helloWorld_signed.pdf'); if (success = 0) then begin Memo1.Lines.Add(pdf.LastErrorText); Exit; end; json := TChilkatJsonObject.Create(Self); json.UpdateBool('invisibleSignature',1); json.UpdateString('subFilter','/ETSI.RFC3161'); json.UpdateBool('timestampToken.enabled',1); // 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',1); success := pdf.SignPdf(json.ControlInterface,'c:/temp/qa_output/helloWorld_signed_2.pdf'); if (success = 0) then begin Memo1.Lines.Add(pdf.LastErrorText); Exit; end; Memo1.Lines.Add('Successfully added a Document Timestamp Signature to the PDF'); end; |
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