widevine

Widevine

Theatricality and deception, powerful agents to the uninitiated.

But we are initiated, aren’t we, Bruce?

The Dark Knight Rises (2012)

L1

• Amzn needs AndroidCDM L1 for 720P/1080P/4K
• Disney+ needs Android L1 for 1080P+
• NetFlix I think needs L1 for Main Profile & UHD

Where did proto file come from?

https://github.com/TDenisM/widevinedump/tree/main/pywidevine/cdm/formats

Where to download L3 CDM?

https://github.com/Jnzzi/4464_L3-CDM

How to dump L3 CDM?

First create Android virtual device:

Then download tool:

https://github.com/wvdumper/dumper

Then install:

pip install -r requirements.txt

Download Frida server:

https://github.com/frida/frida/releases

Example file:

frida-server-15.1.22-android-x86.xz

Start Frida server:

adb root
adb push frida-server-15.1.17-android-x86 /data/frida-server
adb shell chmod +x /data/frida-server
adb shell /data/frida-server

Then start Android Chrome and visit this page:

https://bitmovin.com/demos/drm

If you receive this prompt:

bitmovin.com wants to play protected content. Your device’s identity will be verified by Google.

Click ALLOW. Then start dumper:

python dump_keys.py

Once you see "Hooks completed", go back to Chrome, scroll down and click LOAD. Result:

2022-05-21 02:10:52 PM - Helpers.Scanner - 49 - INFO - Key pairs saved at
key_dumps\Android Emulator 5554/private_keys/4464/2770936375