Difference between revisions of "IMG4 File Format"

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There is a img4 file (sep-firmware.img4) found in IPSWFILE/Firmware/all_flash/all_flash.DEVICEIDENTIFIER.production on any [[A7]] (64bit) devices. It has a IMG40 header, but also refers to IM4P.
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There is an '''img4''' file (sep-firmware.img4) found in the IPSWFILE/Firmware/all_flash/all_flash.DEVICEIDENTIFIER.production for any [[A7]] (64bit) device. It has a IMG40 header, but also refers to [[IM4P File Format]].
   
 
The IMG40 structure is as follows:
 
The IMG40 structure is as follows:

Revision as of 12:48, 26 December 2013

There is an img4 file (sep-firmware.img4) found in the IPSWFILE/Firmware/all_flash/all_flash.DEVICEIDENTIFIER.production for any A7 (64bit) device. It has a IMG40 header, but also refers to IM4P File Format.

The IMG40 structure is as follows:

sequence [
   0: string "IMG40"
   1: string encryption type - IM4P
   2: string type - sepi (Secure Enclave Processor Image), ...
   3: ...
]


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