JJTech

Apparently the #iPhone 12 contains standard a Apple MFi 3.0 coproc (codename "Roswell") on the display flex in order to do parts pairing?

Not really sure what happens in iPhone 13-14, but in 15 they introduce "Mogul" which seems to be the new #MFi 4.0 coproc(?)

May 21 at 6:59amWeb
Show threadJJTechMay 21

You'll see it under AppleAuthCPRelay in ioreg, it's just connected to I2C.

The same AppleAuthCPUserClient appears to also be used to talk to a connected #Lightning authentication chip (over the IDBus protocol)... see AppleAuthCPMGAID

On the iPhone 12, the battery also contains a similar authentication mechanism, though it doesn't exactly seem to be the same MFi coproc.

Show threadJJTechMay 21

(weird side effect of this: if you have a jailbroken iPhone 12, you could theoretically use that for authenticating as a CarPlay headunit... just need to talk via I2C to the display flex)

(this isn't actually useful, on all modern iOS/Mac devices you can get a BAA certificate, which CarPlay will happily accept instead of an MFi certificate because that's how CarPlay Simulator works)