dumper/README.md

Dumper

Dumper is a Frida script to dump L3 CDMs from any Android device.

** IMPORTANT **

You MUST update DYNAMIC_FUNCTION_NAME and CDM_VERSION in script.js to the relevant values for your device.

• CDM_VERSION can be retrieved using a DRM Info app.
• DYNAMIC_FUNCTION_NAME value is unique to your device and can be found in the file libwvhidl.so on your device.

If you've managed to get as far as updating DYNAMIC_FUNCTION_NAME but can't find your function name, create an issue and provide me with your libwvhidl.so file and I will give you the function name you need.

Requirements

Use pip to install the dependencies:

pip3 install -r requirements.txt

Usage

• Enable USB debugging
• Start frida-server on the device
• Execute dump_keys.py
• Start streaming some DRM-protected content

Known Working Versions

• Android 10
  • CDM 15.0.0
• Android 11
  • CDM 16.0.0
• Android 12
  • CDM 16.1.0

Temporary disabling L1 to use L3 instead

A few phone brands let us use the L1 keybox even after unlocking the bootloader (like Xiaomi). In this case, installation of a Magisk module called liboemcrypto-disabler is necessary.

Credits

Thanks to the original author of the code.