Leah Rowe bb9010fdc1 util/nvmutil: require good checksum on cat
since the cat command can be used to create bad
gbe files, if the checksums don't match. my rule
is that nvmutil must never be used to destroy
data, only correct it (e.g. a file with just one
valid part can have it copied to the other part,
but you can't copy a bad part - and i removed
the "brick" command).

i *did* disable checksum requirements on the
dump command. with this, you can check the nvm
area and it tells you what the correct checksum
could be. then you could just correct it in a
hex editor if you wanted to, quite easily.

the idea is to slow down the act of destroying
or corrupting data as much as possible. someone
wily enough can use a hex editor to patch up some
files just fine.

Signed-off-by: Leah Rowe <leah@libreboot.org>
2026-03-10 01:04:28 +00:00
2026-02-26 00:58:06 +00:00
2021-05-18 13:56:12 +01:00
2025-11-14 18:22:51 +00:00

Libreboot

Documentation: libreboot.org
Support: #libreboot on Libera IRC

Libreboot provides libre boot firmware on supported motherboards. It replaces proprietary vendor BIOS/UEFI implementations, by

  • Using coreboot to initialize the hardware (e.g. memory controller, CPU, etc.) while minimizing unwanted functionality (e.g. backdoors such as the Intel Management Engine)
  • ... which runs a payload such as SeaBIOS, GRUB, or U-Boot
  • ... which loads your operating system's boot loader (BSD and Linux-based systems are supported).

Why use Libreboot, and what is coreboot?

A lot of users who use libre operating systems still use proprietary boot firmware, which often contain backdoors and bugs, hampering user freedom and right to repair.

coreboot provides libre boot firmware by initializing the hardware then running a payload. However, coreboot is notoriously difficult to configure and install for most non-technical users, requiring detailed technical knowledge of hardware.

Libreboot solves this by being a coreboot distribution (in the same way that Alpine Linux is a Linux distribution). It provides a fully automated build system that downloads and compiles pre-configured ROM images for supported motherboards, so end-users could easily fetch images to flash onto their devices.

Libreboot also produces documentation aimed at non-technical users and excellent user support via IRC.

Contribute

You can check bugs listed on the bug tracker.

You may use Codeberg pull requests to send patches with bug fixes or other improvements. This repository hosts the code for the main build system. The website lives in a separate repository.

Development is also done on the IRC channel.

License for this README

It's just a README file. It is released under Creative Commons Zero, version 1.0.

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