使用PHP针对远程证书的Windows Store IAP签名验证 [英] Windows Store IAP signature validation against remote certificate, with PHP
问题描述
我正在尝试为Windows Store应用验证PHP中的IAP收据.基本上，尝试将此示例代码转换为PHP http://msdn .microsoft.com/en-us/library/windows/apps/jj649137.aspx . 收据看起来像这样
I'm trying to validate a IAP receipt in PHP for a Windows Store app. Basically, trying to convert this example code to PHP http://msdn.microsoft.com/en-us/library/windows/apps/jj649137.aspx. The reciept looks like this
<Receipt Version="1.0" ReceiptDate="2012-08-30T23:08:52Z" CertificateId="b809e47cd0110a4db043b3f73e83acd917fe1336" ReceiptDeviceId="4e362949-acc3-fe3a-e71b-89893eb4f528">
<ProductReceipt Id="6bbf4366-6fb2-8be8-7947-92fd5f683530" ProductId="Product1" PurchaseDate="2012-08-30T23:08:52Z" ExpirationDate="2012-09-02T23:08:49Z" ProductType="Durable" AppId="55428GreenlakeApps.CurrentAppSimulatorEventTest_z7q3q7z11crfr" />
<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
<SignedInfo>
<CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
<SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />
<Reference URI="">
<Transforms>
<Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
</Transforms>
<DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
<DigestValue>Uvi8jkTYd3HtpMmAMpOm94fLeqmcQ2KCrV1XmSuY1xI=</DigestValue>
</Reference>
</SignedInfo>
<SignatureValue>TT5fDET1X9nBk9/yKEJAjVASKjall3gw8u9N5Uizx4/Le9RtJtv+E9XSMjrOXK/TDicidIPLBjTbcZylYZdGPkMvAIc3/1mdLMZYJc+EXG9IsE9L74LmJ0OqGH5WjGK/UexAXxVBWDtBbDI2JLOaBevYsyy+4hLOcTXDSUA4tXwPa2Bi+BRoUTdYE2mFW7ytOJNEs3jTiHrCK6JRvTyU9lGkNDMNx9loIr+mRks+BSf70KxPtE9XCpCvXyWa/Q1JaIyZI7llCH45Dn4SKFn6L/JBw8G8xSTrZ3sBYBKOnUDbSCfc8ucQX97EyivSPURvTyImmjpsXDm2LBaEgAMADg==</SignatureValue>
</Signature>
</Receipt>
我已经为服务器检索了这样的证书
I have retrieved a certificate for the server like this
function getCertificate($certID)
{
$url = 'https://lic.apps.microsoft.com/licensing/certificateserver/?cid=' . $certID;
$path = '/mypath/certs/' . $certID;
if(!file_exists($path)) {
$fp = fopen($path, 'w');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FILE, $fp);
$data = curl_exec($ch);
curl_close($ch);
fclose($fp);
}
$cert = file_get_contents($path);
//var_dump(openssl_x509_parse($cert));
return openssl_x509_read($cert);
}
，我认为SignatureValue是我的签名.据我从阅读中了解到的，我需要的功能是openssl_verify，但是我不确定应该使用哪些参数，因为验证始终会失败.
and I assume that SignatureValue is my signature. As far as I can tell from reading around, the function I need is openssl_verify but I'm not sure what parameters I should be using as the verify always fails.
$data = $receiptXML->Signature->SignatureValue;
$pubkeyid = openssl_get_publickey($cert);
// state whether signature is okay or not
$ok = openssl_verify($receipt, $data, $pubkeyid, OPENSSL_ALGO_SHA256);
if($ok == 1) {
echo "good";
} elseif($ok == 0) {
echo "bad";
} else {
echo "ugly, error checking signature";
}
// free the key from memory
openssl_free_key($pubkeyid);
有人知道我在哪里错了吗?
Does anyone know where I've gone wrong here?
推荐答案
我花了几天的时间来核对收据，并最终使它生效...
I spend days to verify the receipts and finally get it to work...
<?php
/**
* Date: 01.11.2013
* Time: 23:09
* @author: Philipp Serrer
*/
namespace Ephisa\Service\WindowsStore;
require_once subpath . 'vendor/xmlseclibs/xmlseclibs.php';
use Ephisa\Cache;
class Receipt {
private $doc;
private $objXMLSecDSig;
private $objDSig;
function __construct($xml, $isFile = false)
{
if ($isFile) {
$xml = file_get_contents($xml);
}
// strip unwanted chars - IMPORTANT!!!
$xml = str_replace(array("\n","\t", "\r"), "", $xml);
//some (probably mostly WP8) receipts have unnecessary spaces instead of tabs
$xml = preg_replace('/\s+/', " ", $xml);
$xml = str_replace("> <", "><", $xml);
$doc = new \DOMDocument();
$doc->loadXML($xml);
$objXMLSecDSig = new \XMLSecurityDSig();
$objDSig = $objXMLSecDSig->locateSignature($doc);
if (!$objDSig) {
throw new InvalidSignatureException();
}
//canonicalize
$objXMLSecDSig->canonicalizeSignedInfo();
$this->objDSig = $objDSig;
$this->objXMLSecDSig = $objXMLSecDSig;
$this->doc = $doc;
}
/**
* Returns the key for verification.
*
* @return null|\XMLSecurityKey
*/
function getKey()
{
$objKey = $this->objXMLSecDSig->locateKey();
$keyInfo = \XMLSecEnc::staticLocateKeyInfo($objKey, $this->objDSig);
if (!$keyInfo->key) {
$xpath = new \DOMXPath($this->doc);
$query = 'string(/Receipt/@CertificateId)';
$id = $xpath->evaluate($query);
Cache::instance()->setLifetime(60*60*24*7, 'win-store-cert');
$cert = Cache::instance()->get($id, 'win-store-cert', function() use ($id) {
return file_get_contents('https://lic.apps.microsoft.com/licensing/certificateserver/?cid=' . $id);
});
$objKey->loadKey($cert, false);
}
return $objKey;
}
/**
* Verifies the given receipt
*
* @return bool Returns TRUE on success
*/
function verify()
{
try {
if (!$this->objXMLSecDSig->validateReference()) {
return false;
}
return (bool)$this->objXMLSecDSig->verify($this->getKey());
}
catch (\Exception $e)
{
// failure...
}
return false;
}
}
此代码是我框架的一部分，因此包含一些框架依赖代码(缓存)，但是我认为您已经掌握了主要思想及其工作原理.当然，您必须包括 https://github.com/robrichards/xmlseclibs
This code is a part of my framework and therefore contains some framework dependend code(Cache), but I think, you get the main idea and how it works. Of course, you have to include php xmlseclibs available at https://github.com/robrichards/xmlseclibs
这篇关于使用PHP针对远程证书的Windows Store IAP签名验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
