Hacking How do I recover from lost Boot0

[flduch]

Hello everybody,

I need to build a new Boot0 (either versions) for my switch. I've a valid rawnand and all the necessary keys. I know that I "just" have to get a "how most" empty valid Boot0 (for example created by choidujour) and fill it with the necessary encrypred part using the specific keys from my switch. I know that some people have success with this operation and I would be nice if some one can give my some advices how to do that.

Kind regards

 

[thesjaakspoiler]

Some people were discussing such an issue in these 2 threads.
Maybe those threads can help you find that Boot0.
https://gbatemp.net/threads/help-recover-switch-without-boot0-boot1-backups.537072/
https://gbatemp.net/threads/would-i...ost-blank-boot0-1-for-repair-purposes.533830/

 

[flduch]

@thesjaakspoiler : thx for your advise but both threads do not help me.

The problem is that I have to know how to inject the keyblobs on an encrypted form derived from the console's SBK (Secure Boot Key) into the Boot0. Without doing this, the switch can't boot.