Question about pair-pin-start protocolc

[fduncanh]

Hi

I hope you dont mind me asking for any advice.

I am a maintainer of the AirPlay (mirror and Audio-streaming) server UxPlay http://github.com/FDH2/UxPlay which
acts like an AppleTV. Its codebase is C and derives from ShairPlay/AirPlayServer/RpiPlay.

UxPlay handles legacy pairing, but this is now off by default and the Features bit for this and password is turned off. With these features enabled the client initiates pair-pin-start etc. and when clients are managed with MDM they may request pair-pin-start even if the server does not require a password.So I am considering adding it, but it has never been in the ancestral codebase of ShairPlay from which our implementation derives.

• Am I right that your codebase is only implementing it for the client but not the server?

• will I find enough information in you codebase to handle the (C implementation ) of pair-setup-pin on the server before pair verify?

Grateful for any suggestions.

Uxplay with the features bit (27) for "supports legacy pairing" turned on currently just does:

pair_setup
pair_verify 1
pair_verify 2
fp_setup

etc

I suppose that pair-pin-setup replaces pair-setup ?

@fduncanh

[philippe44]

Hi - no worries, happy to help if I can. AFAIK, pair-pin-setup is what is used now, I've never implement legacy pairing.

• my code base is indeed for the client, not for the server
• I think you'll have what you need for a server implementation but I also wrote a doc thht will avoid reverse ingineering the code https://htmlpreview.github.io/?https://github.com/philippe44/RAOP-Player/blob/master/doc/auth_protocol.html

[fduncanh]

@philippe44
thanks!