I have an old phone (Galaxy S3 international unbrandedand) and I would like to decrypt my whatsapp backup files (crypt8, as recent as the latest backup which is always at 4 AM, I think). I've googled many tutorials but they all seem to be outdated. Most of them presume that the key file is located in /data/data/com.whatsapp/, however this folder does not exist on my phone. I've also tried adb backup as root on my linux laptop (adb backup -f whatsapp.ab -noapk com.whatsapp), but when I transform this ab file into a tar and then extract its contents, it's just empty. I've also tried to locate the com.whatsapp folder (not the user files folder with the actual *.crypt8 files, pictures, etc), but I can't find it anywhere on my phone.
Am I missing something? Are the whatsapp app files somewhere else now? Or has the location of whatsapp changed?