How can I access vehicle properties which have signature permission? Is it possible to root Android automotive OS?

Question

I need to access VHAL properties like ABS_ACTIVE, ENGINE_RPM, etc which are restricted with signature permissions. The third-party app access to VHAL is restricted with permissions. I will get OEM signature permission in the production build, but for testing, I need to sign my app with an AOSP certificate or I have to move my app into the system folder.

Where can I find those certificates?
How can I sign my app with those certificates?

score 1 · Answer 1 · answered May 07 '21 at 13:39

Build your own custom system image https://source.android.com/devices/automotive/start/avd
Include your apk in the system image as part of the build (& you will need to pre-grant access to your apk (https://source.android.com/devices/tech/config/perms-allowlist)

The system images that are published by Google/Volvo/Polestar are user/release-keys and hence you won't be to get those platform keys for it.

score 0 · Answer 2 · answered Apr 13 '21 at 06:12

0

For testing you can sign your app with the default platform key that comes with android. The Android tree includes test-keys

answered Apr 13 '21 at 06:12

Chris

11
2

I tried signing as mentioned in this [link](https://stackoverflow.com/a/4257367/7094064). It is working in Android mobile AVD, but not in AVD running on the automotive OS. – Akshay Kumar S Apr 18 '21 at 13:14

How can I access vehicle properties which have signature permission? Is it possible to root Android automotive OS?

2 Answers2