aryankaran / imgpatchtools

Patch img files with system.patch.dat, like OTA zip on PC

IMG Patch Tools

Patch image (.img) using sparse Android data image (.dat) in OTA zip with "BlockImageUpdate" Patch other files (boot.img, firmwares) using patch file (.p) with "ApplyPatchfn"

Downloads

Github Release

Requirements

For Building this tool you need :

• zlib
• libbz2
• openssl

It currently supports Linux x86/x64 & MacOS, Not tested on Windows.

Usage

usage: ./BlockImageUpdate <system.img> <system.transfer.list> <system.new.dat> <system.patch.dat>

args:

• <system.img> = block device (or file) to modify in-place
• <system.transfer.list> = transfer list (blob) from OTA/rom zip
• <system.new.dat> = new data stream from OTA/rom zip
• <system.patch.dat> = patch stream from OTA/rom zip

./ApplyPatchfn <file> <target> <tgt_sha1> <size> <init_sha1(1)> <patch(1)> [init_sha1(2)] [patch(2)]...

• <file> = source file from rom zip
• <target> = target file (use "-" to patch source file)
• <tgt_sha1> = target SHA1 Sum after patching
• <size> = file size
• <init_sha1> = file SHA1 sum
• <patch> = patch file (.p) from OTA zip

usage: ./scriptpatcher.sh <updater-script>

args:

• <updater-script> = updater-script from OTA zip to patch recovery commands

Example

for example from updater-script of OTA we have:

block_image_update("/dev/block/bootdevice/by-name/system", package_extract_file("system.transfer.list"), "system.new.dat", "system.patch.dat")

apply_patch("EMMC:/dev/block/bootdevice/by-name/boot:33554432:f32a854298814c18b12d56412f6e3a31afc95e42:33554432:0041a4df844d4b14c0085921d84572f48cc79ff4",
            "-", 0041a4df844d4b14c0085921d84572f48cc79ff4, 33554432,
            f32a854298814c18b12d56412f6e3a31afc95e42,
            package_extract_file("patch/boot.img.p"))

after getting system.img and boot.img from firmware This is equals of previous functions on PC with this tools:

~$ ./BlockImageUpdate system.img system.transfer.list system.new.dat system.patch.dat
~$ ./ApplyPatchfn boot.img - 0041a4df844d4b14c0085921d84572f48cc79ff4 33554432 f32a854298814c18b12d56412f6e3a31afc95e42

scriptpatcher.sh will generate all commands automatically from updater script so run it like:

~$ ./scriptpatcher.sh META-INF/com/google/android/updater-script > fullpatch.sh

check fullpatch.sh your self, you need to provide all images and files in correct name and patch as mentioned in mount and other commands of fullpatch.sh

Youtube

Info

For more information about this tools, visit https://forum.xda-developers.com/android/software-hacking/dev-img-patch-tools-sdat2img-ota-zips-t3640308.