yihong1991 / restored_external64patcher

a patcher for making downgradable iOS 14 firmware

restored_external64patcher

A tool for patching a 64-bit restored_external binary to skip the sealing of the rootfs

Build

make

Usage

1. Extract binary from an iOS ramdisk (macOS only):

   • img4 -i <ramdisk> -o ramdisk.dmg
     • img4 can be found here
   • hdiutil attach ramdisk.dmg -mountpoint ramdisk
   • cp ramdisk/usr/local/bin/restored_external .
   • hdiutil detach ramdisk

2. Run restored_external64_patcher:

   • restored_external64_patcher restored_external restored_external_patched

3. Resign patched restored_external binary

   • ldid -e restored_external > ents.plist
   • ldid -Sents.plist restored_external_patched