xpwntool rootfs.dmg decrypted_rootfs.dmg -k <key> -iv <iv> Mount the decrypted DMG:
hdiutil convert -format UDZO -o custom_rootfs.dmg decrypted_rootfs.dmg Re-encrypt (for compatibility with iBEC/iBSS) – optional, if you are using a bootrom exploit or patched iBSS . Many custom firmware workflows skip re-encryption and use a patched iBSS that accepts unencrypted images. Replace the original root filesystem DMG inside the IPSW structure with your custom one. Then modify BuildManifest.plist to remove signature checks (or use a tool like ipsw to rebuild).
unzip iPhone4,1_6.1.3_Restore.ipsw -d firmware/ The root filesystem ( 048-XXXXX.dmg ) is encrypted with a per- device key. Use a tool like iDecrypt or xpwntool with the appropriate key (searchable in public key databases for 4s).
Example:
⚠️ : Messing with the baseband (BB) can permanently break cellular. Avoid modifying files inside /usr/local/standalone/firmware .
xpwntool rootfs.dmg decrypted_rootfs.dmg -k <key> -iv <iv> Mount the decrypted DMG:
hdiutil convert -format UDZO -o custom_rootfs.dmg decrypted_rootfs.dmg Re-encrypt (for compatibility with iBEC/iBSS) – optional, if you are using a bootrom exploit or patched iBSS . Many custom firmware workflows skip re-encryption and use a patched iBSS that accepts unencrypted images. Replace the original root filesystem DMG inside the IPSW structure with your custom one. Then modify BuildManifest.plist to remove signature checks (or use a tool like ipsw to rebuild). iphone 4s custom firmware
unzip iPhone4,1_6.1.3_Restore.ipsw -d firmware/ The root filesystem ( 048-XXXXX.dmg ) is encrypted with a per- device key. Use a tool like iDecrypt or xpwntool with the appropriate key (searchable in public key databases for 4s). xpwntool rootfs
Example:
⚠️ : Messing with the baseband (BB) can permanently break cellular. Avoid modifying files inside /usr/local/standalone/firmware . Then modify BuildManifest
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