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clarification 2 

Signed-off-by: Leah Rowe <leah@libreboot.org>
master
Leah Rowe 2023-10-21 16:41:53 +01:00
parent 97451d48e4
commit 88869036a6
1 changed files with 17 additions and 2 deletions
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19
site/docs/linux/index.md
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@ -49,11 +49,17 @@ Then still as root, do these commands:
Now your distro's GRUB menu should work, when your distro's GRUB bootloader is Now your distro's GRUB menu should work, when your distro's GRUB bootloader is
executed from Libreboot's SeaBIOS payload. executed from Libreboot's SeaBIOS payload.
Encrypted (LUKS/dm-crypt) installations Encrypted /boot via LUKS2 with argon2
======================================= =======================================
Full encryption for basic LUKS2 (with PBKDF or argon2 key derivation) is Full encryption for basic LUKS2 (with PBKDF or argon2 key derivation) is
supported in libreboot. Legacy LUKS1 is also supported. supported in libreboot. Legacy LUKS1 is also supported. On *most* other
systems, `/boot` must be encrypted, but Libreboot supports use of the
GRUB bootloader as a coreboot payload.
GRUB has code in it that can be used to unlock LUKS1 and LUKS2 dm-crypt,
using the `cryptomount` command. With this, you can boot with *true* full
disk encryption, by encrypting `/boot`.
This is a boon for security, because it's harder This is a boon for security, because it's harder
to tamper with, and you could potentially write-protect plus maybe provide to tamper with, and you could potentially write-protect plus maybe provide
@ -92,6 +98,15 @@ At the time of the Libreboot 20231021 release, the GRUB upstream (on gnu.org)
did not have these argon2 patches in its source tree, but Libreboot merges and did not have these argon2 patches in its source tree, but Libreboot merges and
maintains them out of tree. maintains them out of tree.
argon2id
--------
You should *specifically* use argon2id. Please ensure this, because some
older LUKS2 setups defaulted to the weaker *argon2d*. This post by Matthew
Garret contains information about that:
<https://mjg59.dreamwidth.org/66429.html>
NOTE: You should also read the instructions about about `GRUB_TERMINAL`. NOTE: You should also read the instructions about about `GRUB_TERMINAL`.
Rebooting system in case of freeze Rebooting system in case of freeze