I have made a little script that will download game icons from Nintendo server. You just need to provide the Title ID !
Nintendo server where icons are stored:
Usage (easy, even for beginners)
You need Python 2.7 (Python 3 won't work) Run it from a Windows command-line.
How to run it:
idbe_decrypt.py TITLE_ID <optional: VERSION>
Not providing a VERSION will fetch the icon for the latest title version
This will produce this output:
output converted to png : (128x128 pixels)
Github Source Code: https://github.com/NexoDevelopment/idbe_decrypt/
Credits to me for the dec/enc keys (hardcoded in nn_idbe.rpl at .rodata+0x4c)
Big thanks to whoever filled in this page, gave me the step to follow