(adsbygoogle = window.adsbygoogle || []).push({}); were withing a fw would i locate the keys for signing

or were would i look for them

The keys are not stored in some file that you could simply open, and read all about it. Not many people know how to find it, but the people who do are like Graf chokolo, geohot, fail0verflows group, and others like them. What firmware keys do you need though?