public function __doRequest($request, $location, $saction, $version)
{
$doc = new DOMDocument('1.0');
$doc->loadXML($request);
$objWSSE = new WSSESoap($doc);
/* add Timestamp with no expiration timestamp */
$objWSSE->addTimestamp();
/* create new XMLSec Key using AES256_CBC and type is private key */
$objKey = new XMLSecurityKey(XMLSecurityKey::RSA_SHA1, array('type' => 'private'));
/* load the private key from file - last arg is bool if key in file (true) or is string (false) */
$objKey->loadKey(PRIVATE_KEY, true);
/* Sign the message - also signs appropiate WS-Security items */
$options = array("insertBefore" => false);
$objWSSE->signSoapDoc($objKey, $options);
/* Add certificate (BinarySecurityToken) to the message */
$token = $objWSSE->addBinaryToken(file_get_contents(CERT_FILE));
/* Attach pointer to Signature */
$objWSSE->attachTokentoSig($token);
$objKey = new XMLSecurityKey(XMLSecurityKey::AES256_CBC);
$objKey->generateSessionKey();
$siteKey = new XMLSecurityKey(XMLSecurityKey::RSA_OAEP_MGF1P, array('type' => 'public'));
$siteKey->loadKey(SERVICE_CERT, true, true);
$options = array("KeyInfo" => array("X509SubjectKeyIdentifier" => true));
$objWSSE->encryptSoapDoc($siteKey, $objKey, $options);
$retVal = parent::__doRequest($objWSSE->saveXML(), $location, $saction, $version);
$doc = new DOMDocument();
$doc->loadXML($retVal);
$options = array("keys" => array("private" => array("key" => PRIVATE_KEY, "isFile" => true, "isCert" => false)));
$objWSSE->decryptSoapDoc($doc, $options);
return $doc->saveXML();
}