sd.Verify( signature, true, CAPICOM_SIGNED_DATA_VERIFY_FLAG.CAPICOM_VERIFY_SIGNATURE_ONLY );
    result = true;
    //проверяем сертификаты, которыми были подписанны данные
    foreach ( Certificate cert in csd.Certificates )
    {
        //устанавливаем флаг, чтобы проверить список отозванных сертификатов
        cert.IsValid().CheckFlag = CAPICOM_CHECK_FLAG.CAPICOM_CHECK_ONLINE_REVOCATION_STATUS;
        if ( cert.IsValid().Result == false )
        {
            result = false;
            break;
        }
    }

var certSubjectName = ... // certificate subject name нового подписанта
var fileSigned = ... // передаем был ли подписан ранее уже файл
var dataToSign = ... // base64String из данных файла
...

var oStore = CreateObject('CAPICOM.Store');
oStore.Open(CAPICOM_CURRENT_USER_STORE, CAPICOM_MY_STORE,
CAPICOM_STORE_OPEN_MAXIMUM_ALLOWED);

var oCertificates = oStore.Certificates.Find(
CAPICOM_CERTIFICATE_FIND_SUBJECT_NAME, certSubjectName);
if (oCertificates.Count == 0) {
	alert('Certificate not found: ' + certSubjectName);
	return;
}
var oCertificate = oCertificates.Item(1);

var oSigningTimeAttr = CreateObject('CADESCOM.CPAttribute');
oSigningTimeAttr.Name = CAPICOM_AUTHENTICATED_ATTRIBUTE_SIGNING_TIME;
var oTimeNow = new Date();
oSigningTimeAttr.Value = ConvertDate(oTimeNow);

var oDocumentNameAttr = CreateObject('CADESCOM.CPAttribute');
oDocumentNameAttr.Name = CADESCOM_AUTHENTICATED_ATTRIBUTE_DOCUMENT_NAME;
oDocumentNameAttr.Value = 'Document Name';

var oSigner = CreateObject('CAdESCOM.CPSigner');
oSigner.Certificate = oCertificate;
oSigner.AuthenticatedAttributes2.Add(oSigningTimeAttr);
oSigner.AuthenticatedAttributes2.Add(oDocumentNameAttr);

var oSignedData;
debugger;
if (fileSigned)
{
	oSignedData = GetDataObject(dataToSign);
}
else
{
	oSignedData = CreateObject('CAdESCOM.CadesSignedData');
	oSignedData.Content = dataToSign;
}
try {
	var sSignedMessage = '';
	if (fileSigned)
	{
		sSignedMessage = oSignedData.CoSignCades(oSigner, CADESCOM_CADES_BES);
	}
	else
	{
		sSignedMessage = oSignedData.SignCades(oSigner, CADESCOM_CADES_BES);
	}
	
} catch (err) {
	alert('Failed to create signature. Error: ' + GetErrorMessage(err));
	return;
}

oStore.Close();

return sSignedMessage;