/**
* Validate signature
*
* @throws Mage_Oauth_Exception
*/
protected function _validateSignature()
{
$util = new Zend_Oauth_Http_Utility();
$calculatedSign = $util->sign(array_merge($this->_params, $this->_protocolParams), $this->_protocolParams['oauth_signature_method'], $this->_consumer->getSecret(), $this->_token->getSecret(), $this->_request->getMethod(), $this->_request->getScheme() . '://' . $this->_request->getHttpHost() . $this->_request->getRequestUri());
if ($calculatedSign != $this->_protocolParams['oauth_signature']) {
$this->_throwException('', self::ERR_SIGNATURE_INVALID);
}
}
