Hi Gio, On Friday, December 8th, 2023 at 9:34 AM, Giovanni Biscuolo <g...@xelera.eu> wrote:
> > Hello, > > I've noticed that the last released system installer [1], when using the > guided install workflow, is using a LUKS1 encryption; since I would like > to install on a LUKS2 encrypted root filesystem I tried to "manually" > install following the instructions in the manual [2]. > > When using a LUKS2 encryption format [3], completing the installation > and rebooting, I get an error from Grub: it cannot find the encrypted > volume, it's trying to open the /unencrypted/ volume instead (via UUID), > child of the LUKS2 encrypted one. > > If I just change the type of encryption to "luks1" in [3], the booting > of the installed machine works as expected. > > Since I know that the LUKS2 support in Grub was not available when Guix > 1.4 was released, I also tried to "guix pull && hash guix" /before/ > installing with "guix system init /mnt/etc/config.scm /mnt", but the > error was the same. > > I still have not tried to build an updated system installation image to > see if it is working. > > Since the (stable) manual provides instructions on how to install Guix > System on a LUKS2 encrypted partition [4], I'd like to understand if I'm > doing something wrong or there is a bug, at least in the manual. About halfway through the email, your use of LUKS2 with Grub was tickling my brain about what I remembered reading regarding Grub's LUKS2 support being limited. While searching for references for that--and subsequently seeing that you were already using PBKDF2--I came across https://savannah.gnu.org/bugs/?55093 which seems to hold the answer. According to the newest comment, Grub 2.06 has a seemingly-undocumented additional requirement for working with LUKS2 of needing to use sha256 as the keyslot hash. Additionally, https://wiki.archlinux.org/title/GRUB#LUKS2 suggests that Grub 2.06 requires manually creating an EFI binary using grub-mkimage (with grub-install once again being sufficient in 2.12rc1), though I don't know if the Guix bootloader machinery addresses that shortcoming or not. Please take the above with a grain of salt, as I have only ever used LUKS1 with Grub (and I've recently started moving away from Grub). HTH! Cheers, Kaelyn > I'm attaching the script I'm using for the "manual" installation: if I > set "luks2" in the "cryptsetup luksFormat..." command /and/ uncomment > the "guix pull && hash guix" commands, the installation provides an > unbootable system. > > Sorry for the "short story made long" but my script it's a proof of > concept to allow installing a Guix System starting from any (recent) > rescue system (tested only with a Guix install image and a systemd > rescue system, grml), that's why is so "long": > > > > Thanks! Gio' > > [1] https://ftp.gnu.org/gnu/guix/guix-system-install-1.4.0.<arch>-linux.iso > > > [2] https://guix.gnu.org/en/manual/en/html_node/Manual-Installation.html > > [3] cryptsetup luksFormat --type luks2 --pbkdf pbkdf2 /dev/sdaX > > [4] > https://guix.gnu.org/en/manual/en/html_node/Keyboard-Layout-and-Networking-and-Partitioning.html > > -- > Giovanni Biscuolo > > Xelera IT Infrastructures
