Pascal (Lazarus/Delphi)

Create Egypt ITIDA CAdES-BES .p7s Signature (with strings in-memory)

See more Egypt ITIDA Examples

Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements.

Note: This example requires Chilkat v9.5.0.75 or greater.

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;
  cmsOptions: TJsonObject;
  jsonSigningAttrs: TJsonObject;
  textToSign: string;
  sigBase64: 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;

  cert := TCert.Create;

  //  There are many ways to load the certificate.  
  //  This example was created for a customer using an ePass2003 USB token.
  //  Assuming the USB token is the only source of a hardware-based private key..
  success := cert.LoadFromSmartcard('');
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Tell the crypt component to use this cert.
  success := crypt.SetSigningCert(cert);
  if (success <> True) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  cmsOptions := TJsonObject.Create;
  //  Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
  cmsOptions.UpdateBool('DigestData',True);
  cmsOptions.UpdateBool('OmitAlgorithmIdNull',True);
  crypt.CmsOptions := cmsOptions.Emit();

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

  crypt.HashAlgorithm := 'sha256';

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

  //  By default, all the certs in the chain of authentication are included in the signature.
  //  If desired, we can choose to only include the signing certificate:
  crypt.IncludeCertChain := False;

  //  Make sure we sign the utf-8 byte representation of the JSON string
  crypt.Charset := 'utf-8';

  //  Create the CAdES-BES signature.
  textToSign := '"issuer""address""branchID""0""country""EG""regionCity...';

  crypt.EncodingMode := 'base64';
  sigBase64 := crypt.SignStringENC(textToSign);
  if (crypt.LastMethodSuccess = False) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  WriteLn('Base64 signature:');
  WriteLn(sigBase64);


  crypt.Free;
  cert.Free;
  cmsOptions.Free;
  jsonSigningAttrs.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.