Delphi DLL

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.

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Cert, JsonObject, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
crypt: HCkCrypt2;
cert: HCkCert;
cmsOptions: HCkJsonObject;
jsonSigningAttrs: HCkJsonObject;
textToSign: PWideChar;
sigBase64: PWideChar;

begin
success := False;

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

crypt := CkCrypt2_Create();

cert := CkCert_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 := CkCert_LoadFromSmartcard(cert,'');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

// Tell the crypt component to use this cert.
success := CkCrypt2_SetSigningCert(crypt,cert);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCrypt2__lastErrorText(crypt));
    Exit;
  end;

cmsOptions := CkJsonObject_Create();
// Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
CkJsonObject_UpdateBool(cmsOptions,'DigestData',True);
CkJsonObject_UpdateBool(cmsOptions,'OmitAlgorithmIdNull',True);
CkCrypt2_putCmsOptions(crypt,CkJsonObject__emit(cmsOptions));

// The CadesEnabled property applies to all methods that create CMS/PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true. 
CkCrypt2_putCadesEnabled(crypt,True);

CkCrypt2_putHashAlgorithm(crypt,'sha256');

jsonSigningAttrs := CkJsonObject_Create();
CkJsonObject_UpdateInt(jsonSigningAttrs,'contentType',1);
CkJsonObject_UpdateInt(jsonSigningAttrs,'signingTime',1);
CkJsonObject_UpdateInt(jsonSigningAttrs,'messageDigest',1);
CkJsonObject_UpdateInt(jsonSigningAttrs,'signingCertificateV2',1);
CkCrypt2_putSigningAttributes(crypt,CkJsonObject__emit(jsonSigningAttrs));

// 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:
CkCrypt2_putIncludeCertChain(crypt,False);

// Make sure we sign the utf-8 byte representation of the JSON string
CkCrypt2_putCharset(crypt,'utf-8');

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

CkCrypt2_putEncodingMode(crypt,'base64');
sigBase64 := CkCrypt2__signStringENC(crypt,textToSign);
if (CkCrypt2_getLastMethodSuccess(crypt) = False) then
  begin
    Memo1.Lines.Add(CkCrypt2__lastErrorText(crypt));
    Exit;
  end;

Memo1.Lines.Add('Base64 signature:');
Memo1.Lines.Add(sigBase64);

CkCrypt2_Dispose(crypt);
CkCert_Dispose(cert);
CkJsonObject_Dispose(cmsOptions);
CkJsonObject_Dispose(jsonSigningAttrs);

end;