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Unencrypted password in EFI mode

From: paul kerdren
Subject: Unencrypted password in EFI mode
Date: Wed, 3 Jun 2020 12:24:55 +0200


I know it's a really bad practice but I would like to understand the
differences between BIOS and EFI mode in grub.

When I put "password user insecure" in the /boot/grub2/grub.cfg file in
BIOS mode, grub recognizes my password and allows me to edit the grub

On the other hand, when I'm in EFI mode (/boot/efi/EFI/centos/grub.cfg),
the password doesn't work and I have the punishment delay increasing.
The password_pbkdf2 command works correctly.

Could you explain me the difference between the 2 modes?
I searched in the source code but didn't find anything relevant.


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