private function _compareFingerprints($calcFingerprint, $responseFingerprint)
 {
     $responseFingerprintOrder = $this->_fingerprintOrder;
     $responseFingerprintData = $this->_getFingerprintFields($responseFingerprintOrder);
     if (!WirecardCEE_Fingerprint::compare($responseFingerprintData, $responseFingerprintOrder, $responseFingerprint)) {
     }
     if ($responseFingerprint != $calcFingerprint) {
         throw new WirecardCEE_Client_QPay_Exception('Fingerprints do not match. calc: ' . $calcFingerprint . ' resp: ' . $responseFingerprint);
     } else {
         return true;
     }
 }