From befeea2ee3c969471a30becb38cd2abf9c4e2413 Mon Sep 17 00:00:00 2001
From: Francis Rowe
- Note: cryptomount -a mounts all encrypted devices found. It may be desirable to just mount the needed partition. - To do so you may either specify your partition via layout (e.g.: cryptomount -a (ahci0,msdos1)) - or use the UUID cryptomount -u UUID. + Without specifying a device, the -a parameter tries to unlock all detected LUKS volumes. + You can also specify -u UUID or -a (device).
@@ -591,24 +590,27 @@
- Using the above installation method, you will have to unlock the encrypted file system twice
- (once in GRUB, and again when booting Parabola).
- To circumvent this, you can insert a keyfile into the initramfs. This is generally safe, because the /boot/ directory is encrypted.
- First create a keyfile:
+ By default, you will have to enter your LUKS passphrase twice; once in GRUB, and once when booting the kernel.
+ GRUB unlocks the encrypted partition and then loads the kernel, but the kernel is not aware of the fact
+ that it is being loaded from an encrypted volume. Therefore, you will be asked to enter your passphrase a second time.
+ A workaround is to put a keyfile inside initramfs, with instructions for the kernel to use it when
+ booting. This is safe, because /boot/ is encrypted (otherwise, putting a keyfile inside initramfs would be a bad idea).
+
+ Generate the file:
# dd bs=512 count=4 if=/dev/urandom of=/etc/mykeyfile iflag=fullblock
- Add the keyfile to the Luks Device:
+ Insert it into the luks volume:
# cryptsetup luksAddKey /dev/sdX /etc/mykeyfile
Add the keyfile to the initramfs by adding it to FILES in /etc/mkinitcpio.conf. For example:
+ Integrate it inside initramfs:
# FILES="/etc/mykeyfile"
- Re-create the initramfs image:
+ Create the initramfs image from scratch:
# mkinitcpio -p linux-libre
- Reboot and add the following to the kernel command line in GRUB:
+ Add the following to your grub.cfg, or add it in the kernel command line for GRUB:
# cryptkey=rootfs:/etc/mykeyfile
- If everything works as expected, permanently add the kernel parameter to the GRUB config using
- the instructions at grub_cbfs.html.
+ You can also place this inside the grub.cfg that exists in CBFS: grub_cbfs.html.
- Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
- Copyright © 2015 Thomas Zelch <tze@xenlab.de>
- Copyright © 2015 Arthur Heymans <arthur@aheymans.xyz>
- Copyright © 2015 Tobias Heinicke <theinicke@bss-wf.de>
- This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions.
- A copy of the license can be found at ../cc-by-sa-4.txt.
+ Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
+ Permission is granted to copy, distribute and/or modify this document
+ under the terms of the GNU Free Documentation License, Version 1.3
+ or any later version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+ A copy of the license can be found at ../gfdl-1.3.txt
+
+ Updated versions of the license (when available) can be found at + https://www.gnu.org/licenses/licenses.html
- This document is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See ../cc-by-sa-4.txt for more information. + UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE + EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS + AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF + ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, + IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION, + WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR + PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS, + ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT + KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT + ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU. +
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