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(Delphi ActiveX) Sign PDF using PAdES-Baseline-BSee more PDF Signatures ExamplesPAdES-Baseline-B is the most basic, entry-level profile of the PDF Advanced Electronic Signatures (PAdES) standard. It means:
In short: Baseline-B = a standard PDF digital signature that ensures integrity and origin, but without time or revocation guarantees.
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 success: Integer; pdf: TChilkatPdf; json: TChilkatJsonObject; cert: TChilkatCert; outFilePath: WideString; begin success := 0; pdf := TChilkatPdf.Create(Self); // Load a PDF to be signed. success := pdf.LoadFile('c:/someDir/my.pdf'); if (success = 0) then begin Memo1.Lines.Add(pdf.LastErrorText); Exit; end; // Options for signing are specified in JSON. json := TChilkatJsonObject.Create(Self); json.UpdateString('subFilter','/ETSI.CAdES.detached'); json.UpdateBool('signingCertificateV2',1); json.UpdateBool('signingTime',1); json.UpdateString('signingAlgorithm','pkcs'); json.UpdateString('hashAlgorithm','sha256'); // ----------------------------------------------------------- // The following JSON settings define the signature appearance. json.UpdateInt('page',1); json.UpdateString('appearance.y','top'); json.UpdateString('appearance.x','left'); json.UpdateString('appearance.fontScale','10.0'); json.UpdateString('appearance.text[0]','Digitally signed by: cert_cn'); json.UpdateString('appearance.text[1]','current_dt'); json.UpdateString('appearance.text[2]','Hello 123 ABC'); // -------------------------------------------------------------- // Load the signing certificate. (Use your own certificate.) // Note: There are other methods for using a certificate on an HSM (smartcard or token) // or from other sources, such as a cloud HSM, a Windows installed certificate, // or other file formats. cert := TChilkatCert.Create(Self); success := cert.LoadPfxFile('c:/myPfxFiles/myPdfSigningCert.pfx','pfxPassword'); if (success = 0) then begin Memo1.Lines.Add(cert.LastErrorText); Exit; end; // Once we have the certificate object, tell the PDF object to use it for signing success := pdf.SetSigningCert(cert.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(pdf.LastErrorText); Exit; end; // Sign the PDF, creating the output file. outFilePath := 'c:/someDir/mySigned.pdf'; success := pdf.SignPdf(json.ControlInterface,outFilePath); if (success = 0) then begin Memo1.Lines.Add(pdf.LastErrorText); Exit; end; Memo1.Lines.Add('Success.'); end; |
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