Re: https://firmwaresecurity.com/2018/03/31/geoff-chappell-secure-boot-internals/
https://github.com/mattifestation/BCD
Click on above URL or remove spaces in below URL (WordPress mangles Github Gist URLs…)
https://gist. github.com/mattifestation /f1e160bc970c8a7b82355d7e5946901b