[Feature Request] Contacts support with extracted keys

[probablypablito]

Is your feature request related to a problem? Please describe.
As of now "Contacts Only" is not supported.

Describe the solution you'd like
Utilizing this project to extract the AirDrop keys from a Mac and allowing for Contacts Only mode.

Additional context (optional)
Reversing the entire authentication / key protocol would be ideal as it would allow for no Mac, but this seems like a nice first step that leaves room for that to happen in the future. The implementation of those keys can be found in the OpenDrop repository, mainly with the get_ssl_context() function and it loading the keys/certs.

Pypush has already done a lot of work with authentication to IDS and Apple's servers, so that might be a good starting place should further reversing happen.