public function getDecryptedSignature()
{
if ($this->signature_file) {
return base64_decode($this->decryptSignature(file_get_contents($this->signature_file->getPath()), md5($this->getEncryptionKey() . \Yii::app()->moduleAPI->get('OphCoCvi')->getUniqueCodeForCviEvent($this->event))));
}
}