_accessKey;
$parameters['SignatureVersion'] = $this->_signatureVersion;
$parameters['Version'] = $this->_apiVersion;
$parameters['SignatureMethod'] = $this->_signatureMethod;
if(!isset($parameters['Timestamp'])) {
$parameters['Timestamp'] = gmdate('Y-m-d\TH:i:s\Z', time()+10);
}
$data = $this->_signParameters($url, $parameters);
return $data;
}
/**
* Set http request type to POST or GET
* @param string $method
*/
public function setHttpMethod($method = "POST") {
$this->_httpMethod = strtoupper($method);
}
/**
* Get the current http request type
* @return string
*/
public function getHttpMethod()
{
return $this->_httpMethod;
}
/**
* Computes the RFC 2104-compliant HMAC signature for request parameters
*
* This implements the Amazon Web Services signature, as per the following
* specification:
*
* 1. Sort all request parameters (including SignatureVersion and
* excluding Signature, the value of which is being created),
* ignoring case.
*
* 2. Iterate over the sorted list and append the parameter name (in its
* original case) and then its value. Do not URL-encode the parameter
* values before constructing this string. Do not use any separator
* characters when appending strings.
*
* @param string $queue_url Queue URL
* @param array $parameters the parameters for which to get the signature.
*
* @return string the signed data.
*/
protected function _signParameters($url, array &$paramaters)
{
$data = $this->_httpMethod . "\n";
$data .= parse_url($url, PHP_URL_HOST) . "\n";
$data .= ('' == $path = parse_url($url, PHP_URL_PATH)) ? '/' : $path;
$data .= "\n";
uksort($paramaters, 'strcmp');
unset($paramaters['Signature']);
$arrData = array();
foreach($paramaters as $key => $value) {
$arrData[] = $key . '=' . str_replace('%7E', '~', rawurlencode($value));
}
$data .= implode('&', $arrData);
$hmac = Zend_Crypt_Hmac::compute($this->_secretKey, 'SHA256', $data, Zend_Crypt_Hmac::BINARY);
$paramaters['Signature'] = base64_encode($hmac);
return $data;
}
}