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Add prepareAliasChange() method that allows to create/delete Route 53's alias record.
<?php
/**
*
* Copyright (c) 2011, Dan Myers.
* Parts copyright (c) 2008, Donovan Schonknecht.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* This is a modified BSD license (the third clause has been removed).
* The BSD license may be found here:
* http://www.opensource.org/licenses/bsd-license.php
*
* Amazon Route 53 is a trademark of Amazon.com, Inc. or its affiliates.
*
* Route53 is based on Donovan Schonknecht's Amazon S3 PHP class, found here:
* http://undesigned.org.za/2007/10/22/amazon-s3-php-class
*
*/
/**
* Amazon Route53 PHP class
*
* @link http://sourceforge.net/projects/php-r53/
* version 0.9.0
*
*/
class Route53
{
const API_VERSION = '2012-02-29';
protected $__accessKey; // AWS Access key
protected $__secretKey; // AWS Secret key
protected $__host;
public function getAccessKey() { return $this->__accessKey; }
public function getSecretKey() { return $this->__secretKey; }
public function getHost() { return $this->__host; }
protected $__verifyHost = 1;
protected $__verifyPeer = 1;
// verifyHost and verifyPeer determine whether curl verifies ssl certificates.
// It may be necessary to disable these checks on certain systems.
// These only have an effect if SSL is enabled.
public function verifyHost() { return $this->__verifyHost; }
public function enableVerifyHost($enable = true) { $this->__verifyHost = $enable; }
public function verifyPeer() { return $this->__verifyPeer; }
public function enableVerifyPeer($enable = true) { $this->__verifyPeer = $enable; }
/**
* Constructor
*
* @param string $accessKey Access key
* @param string $secretKey Secret key
* @return void
*/
public function __construct($accessKey = null, $secretKey = null, $host = 'route53.amazonaws.com') {
if ($accessKey !== null && $secretKey !== null) {
$this->setAuth($accessKey, $secretKey);
}
$this->__host = $host;
}
/**
* Set AWS access key and secret key
*
* @param string $accessKey Access key
* @param string $secretKey Secret key
* @return void
*/
public function setAuth($accessKey, $secretKey) {
$this->__accessKey = $accessKey;
$this->__secretKey = $secretKey;
}
/**
* Lists the hosted zones on the account
*
* @param string marker A pagination marker returned by a previous truncated call
* @param int maxItems The maximum number of items per page. The service uses min($maxItems, 100).
* @return A list of hosted zones
*/
public function listHostedZones($marker = null, $maxItems = 100) {
$rest = new Route53Request($this, 'hostedzone', 'GET');
if($marker !== null) {
$rest->setParameter('marker', $marker);
}
if($maxItems !== 100) {
$rest->setParameter('maxitems', $maxItems);
}
$rest = $rest->getResponse();
if($rest->error === false && $rest->code !== 200) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('listHostedZones', $rest->error);
return false;
}
$response = array();
if (!isset($rest->body))
{
return $response;
}
$zones = array();
foreach($rest->body->HostedZones->HostedZone as $z)
{
$zones[] = $this->parseHostedZone($z);
}
$response['HostedZone'] = $zones;
if(isset($rest->body->MaxItems)) {
$response['MaxItems'] = (string)$rest->body->MaxItems;
}
if(isset($rest->body->IsTruncated)) {
$response['IsTruncated'] = (string)$rest->body->IsTruncated;
if($response['IsTruncated'] == 'true') {
$response['NextMarker'] = (string)$rest->body->NextMarker;
}
}
return $response;
}
/**
* Retrieves information on a specified hosted zone
*
* @param string zoneId The id of the hosted zone, as returned by CreateHostedZoneResponse or ListHostedZoneResponse
* In other words, if ListHostedZoneResponse shows the zone's Id as '/hostedzone/Z1PA6795UKMFR9',
* then that full value should be passed here, including the '/hostedzone/' prefix.
* @return A data structure containing information about the specified zone
*/
public function getHostedZone($zoneId) {
// we'll strip off the leading forward slash, so we can use it as the action directly.
$zoneId = trim($zoneId, '/');
$rest = new Route53Request($this, $zoneId, 'GET');
$rest = $rest->getResponse();
if($rest->error === false && $rest->code !== 200) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('getHostedZone', $rest->error);
return false;
}
$response = array();
if (!isset($rest->body))
{
return $response;
}
$response['HostedZone'] = $this->parseHostedZone($rest->body->HostedZone);
$response['NameServers'] = $this->parseDelegationSet($rest->body->DelegationSet);
return $response;
}
/**
* Creates a new hosted zone
*
* @param string name The name of the hosted zone (e.g. "example.com.")
* @param string reference A user-specified unique reference for this request
* @param string comment An optional user-specified comment to attach to the zone
* @return A data structure containing information about the newly created zone
*/
public function createHostedZone($name, $reference, $comment = '') {
// hosted zone names must end with a period, but people will forget this a lot...
if(strrpos($name, '.') != (strlen($name) - 1)) {
$name .= '.';
}
$data = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
$data .= '<CreateHostedZoneRequest xmlns="https://route53.amazonaws.com/doc/'.Route53::API_VERSION."/\">\n";
$data .= '<Name>'.$name."</Name>\n";
$data .= '<CallerReference>'.$reference."</CallerReference>\n";
if(strlen($comment) > 0) {
$data .= "<HostedZoneConfig>\n";
$data .= '<Comment>'.$comment."</Comment>\n";
$data .= "</HostedZoneConfig>\n";
}
$data .= "</CreateHostedZoneRequest>\n";
$rest = new Route53Request($this, 'hostedzone', 'POST', $data);
$rest = $rest->getResponse();
if($rest->error === false && !in_array($rest->code, array(200, 201, 202, 204)) ) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('createHostedZone', $rest->error);
return false;
}
$response = array();
if (!isset($rest->body))
{
return $response;
}
$response['HostedZone'] = $this->parseHostedZone($rest->body->HostedZone);
$response['ChangeInfo'] = $this->parseChangeInfo($rest->body->ChangeInfo);
$response['NameServers'] = $this->parseDelegationSet($rest->body->DelegationSet);
return $response;
}
/**
* Retrieves information on a specified hosted zone
*
* @param string zoneId The id of the hosted zone, as returned by CreateHostedZoneResponse or ListHostedZoneResponse
* In other words, if ListHostedZoneResponse shows the zone's Id as '/hostedzone/Z1PA6795UKMFR9',
* then that full value should be passed here, including the '/hostedzone/' prefix.
* @return The change request data corresponding to this delete
*/
public function deleteHostedZone($zoneId) {
// we'll strip off the leading forward slash, so we can use it as the action directly.
$zoneId = trim($zoneId, '/');
$rest = new Route53Request($this, $zoneId, 'DELETE');
$rest = $rest->getResponse();
if($rest->error === false && $rest->code !== 200) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('deleteHostedZone', $rest->error);
return false;
}
if (!isset($rest->body))
{
return array();
}
return $this->parseChangeInfo($rest->body->ChangeInfo);
}
/**
* Retrieves a list of resource record sets for a given zone
*
* @param string zoneId The id of the hosted zone, as returned by CreateHostedZoneResponse or ListHostedZoneResponse
* In other words, if ListHostedZoneResponse shows the zone's Id as '/hostedzone/Z1PA6795UKMFR9',
* then that full value should be passed here, including the '/hostedzone/' prefix.
* @param string type The type of resource record set to begin listing from. If this is specified, $name must also be specified.
* Must be one of: A, AAAA, CNAME, MX, NS, PTR, SOA, SPF, SRV, TXT
* @param string name The name at which to begin listing resource records (in the lexographic order of records).
* @param int maxItems The maximum number of results to return. The service uses min($maxItems, 100).
* @return The list of matching resource record sets
*/
public function listResourceRecordSets($zoneId, $type = '', $name = '', $maxItems = 100) {
// we'll strip off the leading forward slash, so we can use it as the action directly.
$zoneId = trim($zoneId, '/');
$rest = new Route53Request($this, $zoneId.'/rrset', 'GET');
if(strlen($type) > 0) {
$rest->setParameter('type', $type);
}
if(strlen($name) > 0) {
$rest->setParameter('name', $name);
}
if($maxItems != 100) {
$rest->setParameter('maxitems', $maxItems);
}
$rest = $rest->getResponse();
if($rest->error === false && $rest->code !== 200) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('listResourceRecordSets', $rest->error);
return false;
}
$response = array();
if (!isset($rest->body))
{
return $response;
}
$recordSets = array();
foreach($rest->body->ResourceRecordSets->ResourceRecordSet as $set) {
$recordSets[] = $this->parseResourceRecordSet($set);
}
$response['ResourceRecordSets'] = $recordSets;
if(isset($rest->body->MaxItems)) {
$response['MaxItems'] = (string)$rest->body->MaxItems;
}
if(isset($rest->body->IsTruncated)) {
$response['IsTruncated'] = (string)$rest->body->IsTruncated;
if($response['IsTruncated'] == 'true') {
$response['NextRecordName'] = (string)$rest->body->NextRecordName;
$response['NextRecordType'] = (string)$rest->body->NextRecordType;
}
}
return $response;
}
/**
* Makes the specified resource record set changes (create or delete).
*
* @param string zoneId The id of the hosted zone, as returned by CreateHostedZoneResponse or ListHostedZoneResponse
* In other words, if ListHostedZoneResponse shows the zone's Id as '/hostedzone/Z1PA6795UKMFR9',
* then that full value should be passed here, including the '/hostedzone/' prefix.
* @param array changes An array of change objects, as they are returned by the prepareChange utility method.
* You may also pass a single change object.
* @param string comment An optional comment to attach to the change request
* @return The status of the change request
*/
public function changeResourceRecordSets($zoneId, $changes, $comment = '') {
// we'll strip off the leading forward slash, so we can use it as the action directly.
$zoneId = trim($zoneId, '/');
$data = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
$data .= '<ChangeResourceRecordSetsRequest xmlns="https://route53.amazonaws.com/doc/'.Route53::API_VERSION."/\">\n";
$data .= "<ChangeBatch>\n";
if(strlen($comment) > 0) {
$data .= '<Comment>'.$comment."</Comment>\n";
}
if(!is_array($changes)) {
$changes = array($changes);
}
$data .= "<Changes>\n";
foreach($changes as $change) {
$data .= $change;
}
$data .= "</Changes>\n";
$data .= "</ChangeBatch>\n";
$data .= "</ChangeResourceRecordSetsRequest>\n";
$rest = new Route53Request($this, $zoneId.'/rrset', 'POST', $data);
$rest = $rest->getResponse();
if($rest->error === false && !in_array($rest->code, array(200, 201, 202, 204))) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('changeResourceRecordSets', $rest->error);
return false;
}
if (!isset($rest->body))
{
return array();
}
return $this->parseChangeInfo($rest->body->ChangeInfo);
}
/**
* Retrieves information on a specified change request
*
* @param string changeId The id of the change, as returned by CreateHostedZoneResponse or ChangeResourceRecordSets
* In other words, if CreateHostedZoneResponse showed the change's Id as '/change/C2682N5HXP0BZ4',
* then that full value should be passed here, including the '/change/' prefix.
* @return The status of the change request
*/
public function getChange($changeId) {
// we'll strip off the leading forward slash, so we can use it as the action directly.
$zoneId = trim($changeId, '/');
$rest = new Route53Request($this, $changeId, 'GET');
$rest = $rest->getResponse();
if($rest->error === false && $rest->code !== 200) {
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
}
if($rest->error !== false) {
$this->__triggerError('getChange', $rest->error);
return false;
}
if (!isset($rest->body))
{
return array();
}
return $this->parseChangeInfo($rest->body->ChangeInfo);
}
/**
* Utility function to parse a HostedZone tag structure
*/
private function parseHostedZone($tag) {
$zone = array();
$zone['Id'] = (string)$tag->Id;
$zone['Name'] = (string)$tag->Name;
$zone['CallerReference'] = (string)$tag->CallerReference;
// these might always be set, but check just in case, since
// their values are option on CreateHostedZone requests
if(isset($tag->Config) && isset($tag->Config->Comment)) {
$zone['Config'] = array('Comment' => (string)$tag->Config->Comment);
}
return $zone;
}
/**
* Utility function to parse a ChangeInfo tag structure
*/
private function parseChangeInfo($tag) {
$info = array();
$info['Id'] = (string)$tag->Id;
$info['Status'] = (string)$tag->Status;
$info['SubmittedAt'] = (string)$tag->SubmittedAt;
return $info;
}
/**
* Utility function to parse a DelegationSet tag structure
*/
private function parseDelegationSet($tag) {
$servers = array();
foreach($tag->NameServers->NameServer as $ns) {
$servers[] = (string)$ns;
}
return $servers;
}
/**
* Utility function to parse a ResourceRecordSet tag structure
*/
private function parseResourceRecordSet($tag) {
$rrs = array();
$rrs['Name'] = (string)$tag->Name;
$rrs['Type'] = (string)$tag->Type;
$rrs['TTL'] = (string)$tag->TTL;
$rrs['ResourceRecords'] = array();
foreach($tag->ResourceRecords->ResourceRecord as $rr) {
$rrs['ResourceRecords'][] = (string)$rr->Value;
}
return $rrs;
}
/**
* Utility function to prepare a Change object for ChangeResourceRecordSets requests.
* All fields are required.
*
* @param string action The action to perform. One of: CREATE, DELETE
* @param string name The name to perform the action on.
* If it does not end with '.', then AWS treats the name as relative to the zone root.
* @param string type The type of record being modified.
* Must be one of: A, AAAA, CNAME, MX, NS, PTR, SOA, SPF, SRV, TXT
* @param int ttl The time-to-live value for this record, in seconds.
* @param array records An array of resource records to attach to this change.
* Each member of this array can either be a string, or an array of strings.
* Passing an array of strings will attach multiple values to a single resource record.
* If a single string is passed as $records instead of an array,
* it will be treated as a single-member array.
* @return object An opaque object containing the change request.
* Do not write code that depends on the contents of this object, as it may change at any time.
*/
public function prepareChange($action, $name, $type, $ttl, $records) {
$change = "<Change>\n";
$change .= '<Action>'.$action."</Action>\n";
$change .= "<ResourceRecordSet>\n";
$change .= '<Name>'.$name."</Name>\n";
$change .= '<Type>'.$type."</Type>\n";
$change .= '<TTL>'.$ttl."</TTL>\n";
$change .= "<ResourceRecords>\n";
if(!is_array($records)) {
$records = array($records);
}
foreach($records as $record) {
$change .= "<ResourceRecord>\n";
if(is_array($record)) {
foreach($record as $value) {
$change .= '<Value>'.$value."</Value>\n";
}
}
else {
$change .= '<Value>'.$record."</Value>\n";
}
$change .= "</ResourceRecord>\n";
}
$change .= "</ResourceRecords>\n";
$change .= "</ResourceRecordSet>\n";
$change .= "</Change>\n";
return $change;
}
public function prepareAliasChange($action, $name, $hostedZoneId, $dnsName)
{
$change = "<Change>\n";
$change .= '<Action>'.$action."</Action>\n";
$change .= "<ResourceRecordSet>\n";
$change .= '<Name>'.$name."</Name>\n";
$change .= "<Type>A</Type>\n";
$change .= "<AliasTarget>\n";
$change .= '<HostedZoneId>'.$hostedZoneId."</HostedZoneId>\n";
$change .= '<DNSName>'.$dnsName."</DNSName>\n";
$change .= "</AliasTarget>\n";
$change .= "</ResourceRecordSet>\n";
$change .= "</Change>\n";
return $change;
}
/**
* Trigger an error message
*
* @internal Used by member functions to output errors
* @param array $error Array containing error information
* @return string
*/
public function __triggerError($functionname, $error)
{
if($error == false) {
trigger_error(sprintf("Route53::%s(): Encountered an error, but no description given", $functionname), E_USER_WARNING);
}
else if(isset($error['curl']) && $error['curl'])
{
trigger_error(sprintf("Route53::%s(): %s %s", $functionname, $error['code'], $error['message']), E_USER_WARNING);
}
else if(isset($error['Error']))
{
$e = $error['Error'];
$message = sprintf("Route53::%s(): %s - %s: %s\nRequest Id: %s\n", $functionname, $e['Type'], $e['Code'], $e['Message'], $error['RequestId']);
trigger_error($message, E_USER_WARNING);
}
}
/**
* Callback handler for 503 retries.
*
* @internal Used by SimpleDBRequest to call the user-specified callback, if set
* @param $attempt The number of failed attempts so far
* @return The retry delay in microseconds, or 0 to stop retrying.
*/
public function __executeServiceTemporarilyUnavailableRetryDelay($attempt)
{
if(is_callable($this->__serviceUnavailableRetryDelayCallback)) {
$callback = $this->__serviceUnavailableRetryDelayCallback;
return $callback($attempt);
}
return 0;
}
}
final class Route53Request
{
private $r53, $action, $verb, $data, $parameters = array();
public $response;
/**
* Constructor
*
* @param string $r53 The Route53 object making this request
* @param string $action SimpleDB action
* @param string $verb HTTP verb
* @param string $data For POST requests, the data being posted (optional)
* @return mixed
*/
function __construct($r53, $action, $verb, $data = '') {
$this->r53 = $r53;
$this->action = $action;
$this->verb = $verb;
$this->data = $data;
$this->response = new STDClass;
$this->response->error = false;
}
/**
* Set request parameter
*
* @param string $key Key
* @param string $value Value
* @param boolean $replace Whether to replace the key if it already exists (default true)
* @return void
*/
public function setParameter($key, $value, $replace = true) {
if(!$replace && isset($this->parameters[$key]))
{
$temp = (array)($this->parameters[$key]);
$temp[] = $value;
$this->parameters[$key] = $temp;
}
else
{
$this->parameters[$key] = $value;
}
}
/**
* Get the response
*
* @return object | false
*/
public function getResponse() {
$params = array();
foreach ($this->parameters as $var => $value)
{
if(is_array($value))
{
foreach($value as $v)
{
$params[] = $var.'='.$this->__customUrlEncode($v);
}
}
else
{
$params[] = $var.'='.$this->__customUrlEncode($value);
}
}
sort($params, SORT_STRING);
$query = implode('&', $params);
// must be in format 'Sun, 06 Nov 1994 08:49:37 GMT'
$date = gmdate('D, d M Y H:i:s e');
$headers = array();
$headers[] = 'Date: '.$date;
$headers[] = 'Host: '.$this->r53->getHost();
$auth = 'AWS3-HTTPS AWSAccessKeyId='.$this->r53->getAccessKey();
$auth .= ',Algorithm=HmacSHA256,Signature='.$this->__getSignature($date);
$headers[] = 'X-Amzn-Authorization: '.$auth;
$url = 'https://'.$this->r53->getHost().'/'.Route53::API_VERSION.'/'.$this->action.'?'.$query;
// Basic setup
$curl = curl_init();
curl_setopt($curl, CURLOPT_USERAGENT, 'Route53/php');
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, ($this->r53->verifyHost() ? 1 : 0));
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, ($this->r53->verifyPeer() ? 1 : 0));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, false);
curl_setopt($curl, CURLOPT_WRITEFUNCTION, array(&$this, '__responseWriteCallback'));
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
// Request types
switch ($this->verb) {
case 'GET': break;
case 'POST':
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $this->verb);
if(strlen($this->data) > 0) {
curl_setopt($curl, CURLOPT_POSTFIELDS, $this->data);
$headers[] = 'Content-Type: text/plain';
$headers[] = 'Content-Length: '.strlen($this->data);
}
break;
case 'DELETE':
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
break;
default: break;
}
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_HEADER, false);
// Execute, grab errors
if (curl_exec($curl)) {
$this->response->code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
} else {
$this->response->error = array(
'curl' => true,
'code' => curl_errno($curl),
'message' => curl_error($curl),
'resource' => $this->resource
);
}
@curl_close($curl);
// Parse body into XML
if ($this->response->error === false && isset($this->response->body)) {
$this->response->body = simplexml_load_string($this->response->body);
// Grab Route53 errors
if (!in_array($this->response->code, array(200, 201, 202, 204))
&& isset($this->response->body->Error)) {
$error = $this->response->body->Error;
$output = array();
$output['curl'] = false;
$output['Error'] = array();
$output['Error']['Type'] = (string)$error->Type;
$output['Error']['Code'] = (string)$error->Code;
$output['Error']['Message'] = (string)$error->Message;
$output['RequestId'] = (string)$this->response->body->RequestId;
$this->response->error = $output;
unset($this->response->body);
}
}
return $this->response;
}
/**
* CURL write callback
*
* @param resource &$curl CURL resource
* @param string &$data Data
* @return integer
*/
private function __responseWriteCallback(&$curl, &$data) {
$this->response->body .= $data;
return strlen($data);
}
/**
* Contributed by afx114
* URL encode the parameters as per http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/index.html?Query_QueryAuth.html
* PHP's rawurlencode() follows RFC 1738, not RFC 3986 as required by Amazon. The only difference is the tilde (~), so convert it back after rawurlencode
* See: http://www.morganney.com/blog/API/AWS-Product-Advertising-API-Requires-a-Signed-Request.php
*
* @param string $var String to encode
* @return string
*/
private function __customUrlEncode($var) {
return str_replace('%7E', '~', rawurlencode($var));
}
/**
* Generate the auth string using Hmac-SHA256
*
* @internal Used by SimpleDBRequest::getResponse()
* @param string $string String to sign
* @return string
*/
private function __getSignature($string) {
return base64_encode(hash_hmac('sha256', $string, $this->r53->getSecretKey(), true));
}
}
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