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img4tool

A tool for manipulating IMG4, IM4M and IM4P files

BUILD

Install dependencies:

  • Buildsystem
    • autoconf
    • automake
    • libtool
    • pkg-config
  • External
    • openssl
    • libplist-2.0
  • tihmstar's tools

To compile run:

./autogen.sh
make
sudo make install

Features

Print

  • Print IMG4, IM4P, IM4M
    • img4tool infile.img4
    • -a print everything from im4m
    • -i print only im4p

Extract

  • Extract from IMG4

    • Extract IM4P
      • img4tool -e -p out.im4p in.img4
    • Extract IM4M
      • img4tool -e -m out.im4m in.img4

  • Extract from SHSH

    • Extract IM4P
      • img4tool -e -p out.im4p -s in.shsh

  • Extract from IM4P

    • Extract Payload
      • img4tool -e -o out.bin in.im4p
    • Extract and decrypt payload
      • img4tool -e --iv <IV> --key <KEY> -o out.bin in.im4p

Create

  • Create IMG4

    • Create IMG4 with IM4P
      • img4tool -c out.img4 -p in.im4p
    • Create IMG4 with IM4P and IM4M
      • img4tool -c out.img4 -p in.im4p -m in.im4m
    • Create IMG4 with IM4P and SHSH
      • img4tool -c out.img4 -p in.im4p -s in.shsh

  • Create IM4P

    • Create IM4P with type ibss
      • img4tool -c out.im4p -t ibss IBSS.raw
    • Create IM4P with type ibss and custom desc
      • img4tool -c out.im4p -t ibss -d "Pwned iBSS no sigpatches" IBSS.raw

Rename (change IM4P type)

  • img4tool -n rkrn -p kernel.im4p

Convert SHSH to IM4M

  • img4tool --convert -s out.shsh in.im4m

Verify

  • Verify APTicket is valid for BuildManifest

    • Verify IM4M
      • img4tool --verify BuildManifest.plist ticket.im4m
    • Verify SHSH
      • img4tool --verify BuildManifest.plist -s ticket.shsh

  • Verify IMG4 is correctly signed for BuildManifest

    • img4tool --verify BuildManifest.plist in.img4 //needs to contain IM4P and IM4M