Widevine Decryptor or Decryption Process
 

i have access to 25,000 course on udemy however i am unable to download any course content for DRM. I found an extension on GitHub

https://github.com/Puyodead1/udemy-downloader

which require Widevine description key id and and Description key. how i can get those key or anything else to bypass like Widevine l3 decryptor which doesn't work now.

I see tons of UDemy publications by CGpersia. It follows that there you have the How to.

Widevine has 3 level ( 1 -2 -3 ).

Software based ( level 3 )
Hardware based ( level 1 )

The best way for level 3 is making this :

You install AndroidStudio and create virtual machine based on Android.

Create a Pixel 7 Pro with API Level 28 and Target Android 9.

Download Frida bin for Android

https://github.com/frida/frida/releases/download/16.0.8/frida-server-16.0.8-android-x86_64.xz

Push the server frida bin on /sdcard with adb cmd and start your emulated android , run the frida server.

Create a local linux python VirtualEnv ( install frida pip dependancy as well ).

And download this -> https://github.com/wvdumper/dumper

* Launch frida server on your emulated Android
* Launch the script python wvdumper ...

Check if Script get connection to frida.

On Emulated android, open a browser and go to an url to play a DRM stream with widevine. ( Ex : https://bitmovin.com/demos/drm ).

On your console python log you will see some debug information and can check if your keys has been dumped.

In folder of wvdumper -> /key_dumps/ you will get folder tagged by serial Android with inside normally 2 files ( key & cert ) to be used for any downloader...

For L1 you need to dump secure area ... some exploits exist based on Widevine servlet to dump the AES key ( AES key will be used to provision cert / key ) on google server.

Google at any time can revoke kill keys and company can block as well ...

Pay attention that some blacklist L3 ..

Hi, thanks for info. Is there any update? I have tried several times, but no success. Usually, dump_keys.py gives errors about frida.

There are some project in github.

Such as widevineprox,Widevine L3 Decryptor,...