SignatureDoesNotMatch错误使用亚马逊网络服务

下面的代码导致SignatureDoesNotMatch错误，并没有在他们的论坛或支持有太多的运气 - 关于下面的代码有什么问题的任何建议？SignatureDoesNotMatch错误使用亚马逊网络服务

<?php 
error_reporting(E_ALL); 
ini_set("display_errors", 1); 
$AWS_ACCESS_KEY_ID = ""; 
$AWS_SECRET_ACCESS_KEY = ""; 

$base_url = "http://ecs.amazonaws.com/onca/xml?"; 
$url_params = array('Operation'=>"ItemSearch",'Service'=>"AWSECommerceService", 
'AWSAccessKeyId'=>$AWS_ACCESS_KEY_ID,'AssociateTag'=>"", 
'Version'=>"2011-08-01",'Availability'=>"Available",'Condition'=>"All", 
'ItemPage'=>"1",'ResponseGroup'=>"Images,ItemAttributes,EditorialReview", 
'Keywords'=>"Amazon"); 

// Add the Timestamp 
$url_params['Timestamp'] = gmdate("Y-m-d\TH:i:s.\\0\\0\\0\\Z", time()); 

// Sort the URL parameters 
$url_parts = array(); 
foreach(array_keys($url_params) as $key) 
    $url_parts[] = $key."=".$url_params[$key]; 
sort($url_parts); 

// Construct the string to sign 
$string_to_sign = "GET\necs.amazonaws.com\n/onca/xml\n".implode("&",$url_parts); 
$string_to_sign = str_replace('+','%20',$string_to_sign); 
$string_to_sign = str_replace(':','%3A',$string_to_sign); 
$string_to_sign = str_replace(';',urlencode(';'),$string_to_sign); 

// Sign the request 
$signature = hash_hmac("sha256",$string_to_sign,$AWS_SECRET_ACCESS_KEY,TRUE); 

// Base64 encode the signature and make it URL safe 
$signature = base64_encode($signature); 
$signature = str_replace('+','%2B',$signature); 
$signature = str_replace('=','%3D',$signature); 
$signature = str_replace(';',urlencode(';'),$signature); 
$url_string = implode("&",$url_parts); 
$url = $base_url.$url_string."&Signature=".$signature; 
print $url; 

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL,$url); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_TIMEOUT, 15); 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); 

$xml_response = curl_exec($ch); 
echo $xml_response; 
    ?>

来源

2012-05-28 Frank Ly

我得到类似的错误消息：

["Code"]=> string(21) "SignatureDoesNotMatch" 
    ["Message"]=> string(100) "Signature expired: 20130528T162908Z is now earlier than 20130528T162916Z (20130528T163416Z - 5 min.)"

检查我的服务器时钟之后，我发现它的时候是不正确的，并同步我的服务器时钟sudo ntpdate ntp.ubuntu.com后，我能够发送电子邮件与没问题，我希望这个帮助。

来源

2013-05-28 16:45:35

这才刚刚救了我的生命。所有用户都无法注册，因为他们没有收到激活电子邮件... =（任何想法为什么会发生这种情况？（几个小时前，它完美地工作，没有在服务器上做任何改变） –

SignatureDoesNotMatch错误使用亚马逊网络服务

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