iOS：应用扩展之间是否共享安全飞地？

Question

I am working on a app where a encryption key is saved into the secure enclave. So my question is if this data is also shared with the app extensions, ie Siri / Notification Center widget / Watch App?

Answer 1

I tested this using an App Group shared between the app and the app extension. Following the instructions in Sharing Access to Keychain Items Among a Collection of Apps

SecItemCopyMatching will return an item saved by the app (with kSecAccessControlBiometryCurrentSet set) and queried for within the extension. So it appears the answer is yes.