/private/var/mobile/Media/AirFair/sync/afsync.rq
key=GetValue string=FairPlayCertificate --> cert generate grappaID grappaData Grappa(grappaData) --> afsync.rq cert rq --> rsbuffer rsbuffer GrappaID --> sigBuffer (afsync.rs)
/private/var/mobile/Media/AirFair/sync /AirFair/sync/afsync.rq /AirFair/sync/afsync.rs
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