Pascal (Lazarus/Delphi)

Create CAdES-BES .p7m using Smart Card or USB Token

See more Digital Signatures Examples

Demonstrates how to create a CAdES BES invoice.xml.p7m using a certificate stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.77 and at the time of this writing is restricted to the Windows operating system.

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;
  jsonSignedAttrs: TJsonObject;
  inFile: string;
  sigFile: string;

begin
  success := False;

  //  Note: Requires Chilkat v9.5.0.77 or greater.

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

  crypt := TCrypt2.Create;

  //  Use a certificate on a smartcard or USB token.
  cert := TCert.Create;
  //  Load the certificate on the smartcard currently in the reader (or on the USB token).
  //  Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
  //  See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
  success := cert.LoadFromSmartcard('');
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Provide the smartcard PIN.
  //  If the PIN is not explicitly provided here, the Windows OS should
  //  display a dialog for the PIN.
  cert.SmartCardPin := '000000';

  //  Provide the certificate for signing.
  success := crypt.SetSigningCert(cert);
  if (success <> True) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  //  Indicate that SHA-256 should be used.
  crypt.HashAlgorithm := 'sha256';

  //  Specify the signed attributes to be included.
  //  (This is what makes it CAdES-BES compliant.)
  jsonSignedAttrs := TJsonObject.Create;
  jsonSignedAttrs.UpdateInt('contentType',1);
  jsonSignedAttrs.UpdateInt('signingTime',1);
  jsonSignedAttrs.UpdateInt('messageDigest',1);
  jsonSignedAttrs.UpdateInt('signingCertificateV2',1);
  crypt.SigningAttributes := jsonSignedAttrs.Emit();

  inFile := 'qa_data/xml/IT01234567890_11002.xml';
  sigFile := 'qa_output/IT01234567890_11002.xml.p7m';

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

  WriteLn('Success.');


  crypt.Free;
  cert.Free;
  jsonSignedAttrs.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.