byreqz/oxygen-signature-spoofing
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simple signature spoofing patch tutorial and prebuilt binaries for oneplus phones
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README.md add howtos 2021-09-27 19:00:16 +02:00

README.md

oxygen-signature-spoofing

this repo is meant as a simple starting point for patching signature spoofing on oxygen os

structure

README.md

includes this structure, basic information and the how-to's

/bin

includes tools used to patch the jar

/build

default folder for builds to end up in, also includes prebuilt zips

how-to

prerequisites

  • TWRP and Magisk already being present on the phone
  • access to a Linux shell (WSL also works)
  • ADB + drivers if required
  • Java

Android 5-9

Your system is most likely supported by NanoDroid Patcher and can be patched by flashing the magisk module: https://gitlab.com/Nanolx/NanoDroid

If manual deodexing is still needed, as for example AOSP 9, you can follow the tutorial down below:

  1. Boot your phone into TWRP and mount the system
  2. Pull the services.jar from your system
    • adb pull /system/framework framework
    • on OxygenOS you might need to pull from /system/system/framework/ or /system_ext/system/framework/services.jar
  3. Back up the file
    • cp framework/services.jar services.jar.bak
  4. Determine your architecture
    • this will most likely be arm64 but could be arm on older phones
  5. Extract the required files with baksmali
    • java -jar baksmali.jar x framework/oat/[arch]/services.odex -d framework/[arch] -d framework/ -o services-new
  6. Patch the extracted files with smali
    • java -jar smali.jar a services-new -o classes.dex
  7. If it was successfully patched, add the new dex to the jar
    • zip -j framework/services.jar classes*.dex
  8. Push the new jar to the device
    • adb push framework/services.jar /system/framework
    • adb shell chmod 0644 /system/framework/services.jar
    • adb shell chown root:root /system/framework/services.jar
  9. Now flash NanoDroid Patcher

Android 10

As far as I know, its not possible to patch the vdex files in OxygenOS 10. (for generic Android 10 systems, check here: https://gitlab.com/Nanolx/NanoDroid/-/blob/master/doc/DeodexServices.md#vdex)

Android 11

  1. Boot your phone into TWRP and mount the system
  2. Pull the services.jar from your system - adb pull /system/framework/services.jar - on OxygenOS you might need to pull from /system/system/framework/services.jar or /system_ext/system/framework/services.jar
  3. Back up the file - cp services.jar services.jar.bak
  4. Patch the jar using oF2pks' haystack and his custom OxygenOS hook
    • java -jar dexpatcher-1.8.0-beta1.jar -a 30 -M -v -d -o ./ services.jar 11-hook-services.jar.dex 11core-services.jar.dex
  5. add the resulting dex files back into a new jar
    • mkdir -p build/system/framework && cd build
    • zip -j system/framekwork/services.jar ../classes*.dex
  6. replace the services.jar in spoof_AVDapi30.zip
    • cp bin/spoof_AVDapi30.zip .
    • zip -u spoof_AVDapi30.zip /system/framework/services.jar
  7. flash the module (build/spoof_AVDapi30.zip) through Magisk manager while booted into the system

credits

this project was mostly inspired by https://gitlab.com/Nanolx/NanoDroid/-/issues/169 and most things here have been derived from that thread.
base for the tutorial can be found here: https://forum.xda-developers.com/t/signature-spoofing-on-unsuported-android-11-r-roms.4214143/
thanks to oF2pks for the oxygen-os-hook and the tool that makes it all possible https://gitlab.com/oF2pks/haystack/-/tree/11-attempt