拒絕MDM推送詞典，因爲它沒有正確的魔法字符串

Question

我使用蘋果的MDM並找到一個奇怪的問題。 這個iphone設備本來可以被mdm控制，它工作正常，但突然失去控制權，看到xcode設備日誌出現，「拒絕MDM推送字典，因爲它沒有正確的魔術字符串。」 這是如何解決這個問題的？

Aug 1 08:03:04 iPhone6 apsd(PersistentConnection)[93] <Notice>: 2017-08-01 08:03:04 +0800 apsd[93]: <APSCourier: 0x155d12f70>: Received message for enabled topic 'com.apple.mgmt.External.69e3a6a4-4f53' with payload '{ 
 
aps = { 
 
}; 
 
mdm = "5E73DE3E-ADE2-4955-B58C"; 
 
}' onInterface: WWAN for device token: YES with priority (null) 
 
Aug 1 08:03:04 iPhone6 mdmd(libdispatch.dylib)[4508] <Notice>: Push token received. 
 
Aug 1 08:03:04 iPhone6 mdmd(ApplePushService)[4508] <Notice>: Received push notification. 
 
Aug 1 08:03:04 iPhone6 mdmd(ApplePushService)[4508] <Notice>: Rejecting MDM push dictionary because it does not have the right magic string.

Answer 1

你推魔力似乎並不正確，應該幾乎始終處於UUID格式，仔細檢查您發送正確的，或顯示代碼，您是如何在發送/獲取它

來源：

https://media.blackhat.com/bh-us-11/Schuetz/BH_US_11_Schuetz_InsideAppleMDM_WP.pdf

The PushMagic token is a hexadecimal string, likely a simple random UUID (in UUID format).