I don't see how you would get the private key for the airtag off the iPhone without jailbreaking it. The readme of the project implies you can do this but the docs are completely lacking
Sorry for the lacking docs; this has just been a little side project of mine and isn't supposed to be ready for the large public yet. Hence why I'm not the original submitter :-)
You don't need a jailbroken iPhone; a Mac or hackintosh should be sufficient. Some pointers to public discussions:
In the long term I would like to be able to pull the shared secrets directly from the iCloud keychain without having to use a mac, but the reverse engineering efforts are not quite there yet.
