Pascal (Lazarus/Delphi)

Italian FatturaPA (e-Invoice) Signed XML (CADES-BES P7M) using USB SmartCard Reader

See more CAdES Examples

Demonstrates Italian e-Invoice (FatturaPA) signing by using a private key stored on a USB smartcard reader. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Cert,
  Chilkat.JsonObject,
  Chilkat.Crypt2;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  crypt: TCrypt2;
  cert: TCert;
  signedAttrs: TJsonObject;
  inputXmlPath: string;
  outputP7mPath: string;

begin
  success := False;

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

  crypt := TCrypt2.Create;
  crypt.VerboseLogging := True;

  cert := TCert.Create;
  //  Use your smart card user PIN for signing.
  cert.SmartCardPin := '0000';

  success := cert.LoadFromSmartcard('');
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  success := crypt.SetSigningCert(cert);
  if (success = False) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  //  The CadesEnabled property applies to all methods that create PKCS7 signatures. 
  //  To create a CAdES-BES signature, set this property equal to true.
  crypt.CadesEnabled := True;

  crypt.HashAlgorithm := 'sha256';

  signedAttrs := TJsonObject.Create;
  signedAttrs.UpdateInt('contentType',1);
  signedAttrs.UpdateInt('signingTime',1);
  signedAttrs.UpdateInt('messageDigest',1);
  signedAttrs.UpdateInt('signingCertificateV2',1);
  crypt.SigningAttributes := signedAttrs.Emit();

  //  Load XML such as the following:
  //   <p:FatturaElettronica xmlns:p="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" versione="FPR12">
  //      <FatturaElettronicaHeader>
  //         <DatiTrasmissione>
  //  	...
  //         </DatiTrasmissione>
  //         <CedentePrestatore>
  //  	...
  //         </CedentePrestatore>
  //         <CessionarioCommittente>
  //  	...
  //         </CessionarioCommittente>
  //      </FatturaElettronicaHeader>
  //      <FatturaElettronicaBody>
  //         <DatiGenerali>
  //            <DatiGeneraliDocumento>
  //  		...
  //            </DatiGeneraliDocumento>
  //         </DatiGenerali>
  //         <DatiBeniServizi>
  //  	...
  //         </DatiBeniServizi>
  //      </FatturaElettronicaBody>
  //   </p:FatturaElettronica>

  inputXmlPath := 'c:/someDir/e-Invoice.xml';
  outputP7mPath := 'c:/someDir/signed.p7m';

  //  Create the CAdES-BES attached signature, which contains the original data.
  success := crypt.CreateP7M(inputXmlPath,outputP7mPath);
  if (success = False) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  WriteLn('Success.');


  crypt.Free;
  cert.Free;
  signedAttrs.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.