FP4 Flash AVB Custom Key

Hello there,

I have built a custom ROM for the FP4 and am trying to flash it. I am not using a custom key for now, the images are signed using the AOSP default verity key.

I flashed my ROM already and am now trying to flash the avb_custom_key but it miserably fails:

sudo fastboot flash avb_custom_key avb.bin                                                                                 ➜ 0
Sending 'avb_custom_key' (0 KB)                    OKAY [  0.007s]
Writing 'avb_custom_key'                           FAILED (remote: 'Flashing avb_custom_key failed')
fastboot: error: Command failed

I used avbtool to get the raw key from the verity pkcs8:

avbtool.py extract_public_key --key verity.pk8 --output avb.bin

Any ideas what is going on? Also another question, is it possible to disable AVB altogether?

Ah nevermind, the partition needs to be erased before we can flash it

sudo fastboot erase avb_custom_key

Then flashing works