hfHASH.Value = Convert.ToBase64String(hash);

var oStore = CreateObject("CAPICOM.Store");
var oSigner = CreateObject("CAdESCOM.CPSigner");
var CADESCOM_CADES_X_LONG_TYPE_1 = 0x5d;
var CAPICOM_CURRENT_USER_STORE = 2;
var CAPICOM_MY_STORE = "My";
var CAPICOM_STORE_OPEN_MAXIMUM_ALLOWED = 2;
var CAPICOM_CERTIFICATE_FIND_SUBJECT_NAME = 1;

var oStore = CreateObject("CAPICOM.Store");
oStore.Open(CAPICOM_CURRENT_USER_STORE, CAPICOM_MY_STORE,
CAPICOM_STORE_OPEN_MAXIMUM_ALLOWED);
var oSigner = CreateObject("CAdESCOM.CPSigner");
//oSigner.Certificate = oCertificate;
oSigner.TSAAddress = "http://cryptopro.ru/tsp/";

var oSignedData = CreateObject("CAdESCOM.CadesSignedData");
oSignedData.Content = dataToSign;

try {
var sSignedMessage = oSignedData.SignCades(oSigner, CADESCOM_CADES_X_LONG_TYPE_1);
alert(sSignedMessage);
} catch (err) {
alert("Failed to create signature. Error: " + GetErrorMessage(err));
return;
}

oStore.Close();

private bool CheckSign()
{
dynamic signedData = new CAdESCOM.CadesSignedData();
bool res = signedData.VerifyCades(signedMessage, CAdESCOM.CADESCOM_CADES_TYPE.CADESCOM_CADES_X_LONG_TYPE_1, false);

return res;
}