Thread: Garmin GMA protection and the "Unauthenticated" status

Originally Posted by ddabcd277

@ roger
If you are a map developer you can make money from that. Not paying to garmin. But in general it is stupid. Just like making a software for iOS and not paying to Apple. For example.

Sorry....I'm not a software developer, even maps. I can make 2+2 and not always
I'm sorry but I did not understand much the meaning of your sentence. Perhaps because the translator on-line has its limitations (like mine)

What I meant in my post is that the GMA does not have to worry (for now)
In Italian language: discorso di "lana caprina"

Bye,bye

@ roger

You wrote "what's the point" and I gave my explanation why would someone need creating gma. Well, never mind.

P.P.: We wrote together with Kunix.

Originally Posted by ddabcd277

@ kunix
Kunix, can you make it in binary? Maybe it would be easier to figure something out.
And at the end what are we searching for? Do we know a result? Do we know is it bounded to the nuvi ID or other nuvi number? Surely is connected to the FID of the map.

You can just paste "81D8B8..." into your favorite hex editor, as "81D8B8..." is a valid binary form, i.e. 81 is the 1st byte, D8 is the next byte and so on.
As far as I've seen in the firmware, GMA contains old-good 25-character unlock codes. But I don't know all the details. I've seen that GMA parser uses AES for something. I really don't know what for.
We're looking for a way to forge GMA files. Or sign patched GCD files, which would much more useful for me.

Originally Posted by roger1109

In any case, what's the point? You have the tools to unlock the final .... that's more than enough

Well, as far as I know unlocked maps are not as good as the originals (some minor functionality is lost, I just don't remember which one exactly).