Google Pixel 8 Pro // Android 14 // Cdm: Failed to set challenge data: Error parsing message

[Win8Error]

Hi hyugogirubato,

keydive failed to extract my Widevine CDM from my Pixel 8 Pro (Android 14). When i enable logging it outputs a suspicious error message Cdm: Failed to set challenge data: Error parsing message.

My Pixel runs android 14 and i created a functions.xml with Ghidra.

Screenshot:

[hyugogirubato]

The challenge parsing error is not a problem because it only impacts the client id which has been dumped correctly.

Concretely, the private key never passes into the filter function. I recommend that you first re-analyze with ghidra but this time by selecting all possible options for the analysis. If it still does not work, try with another site or another application using DRM very basicly (eg: axinom_signed.apk). And if it still does not work after these two tries, modify the code live to remove the filter function from the known functions.

However, it is very likely related to the incomplete ghidra analysis. If necessary, you can always contact me on discord for a live debug via teamviewer.