From d2bceb62b1f665621d422aa6b073811112407772 Mon Sep 17 00:00:00 2001
From: Klas Lindfors <klas@yubico.com>
Date: Wed, 13 Jun 2012 09:32:38 +0200
Subject: [PATCH] if the sync request is empty, drop it as early as possible.

---
 ykval-sync.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ykval-sync.php b/ykval-sync.php
index 7f81983..12c81af 100644
--- a/ykval-sync.php
+++ b/ykval-sync.php
@@ -7,6 +7,11 @@ $apiKey = '';
 
 header("content-type: text/plain");
 
+if(empty($_SERVER['QUERY_STRING'])) {
+  sendResp(S_MISSING_PARAMETER, $apiKey);
+  exit;
+}
+
 $myLog = new Log('ykval-sync');
 $myLog->addField('ip', $_SERVER['REMOTE_ADDR']);