Gentoo Archives: gentoo-user

From: Heiko Baums <lists@××××××××××××.de>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] cryptsetup wont use aes-xts:plain64
Date: Sat, 18 Apr 2015 12:44:33
Message-Id: 553251A7.10205@baums-on-web.de
In Reply to: Re: [gentoo-user] cryptsetup wont use aes-xts:plain64 by Ralf
1 Am 18.04.2015 um 14:12 schrieb Ralf:
2
3 > No. Could you please explain why you think so?
4 > Even if your root partition is encrypted, your ramdisk could load the
5 > modules.
6
7 Are you sure about that? Are you sure that the necessary modules are
8 definitely put into the initrd and that the kernel will be able to load
9 them soon enough at boot time?
10
11 Compiling those modules into the kernel is definitely more secure (in
12 terms of being sure that they are always available) and doesn't do any
13 harm, because they need to be loaded anyway.
14
15 Btw., several dm-crypt/LUKS documentation (all that I've read) say that
16 those modules have to be compiled into the kernel directly.
17
18 > After loading the modules you can see that they are available by cat
19 > /proc/crypto.
20
21 You won't be able to run this command when the kernel tries to unlock
22 the LUKS container at boot time.
23
24 > The modules can be loaded _after_ bootup as well.
25
26 If you want to unlock the LUKS container at boot time (particularly if
27 your root partition is encrypted), loading the modules after bootup is
28 too late.
29
30 So I wouldn't risk it.

Replies

Subject Author
Re: [gentoo-user] cryptsetup wont use aes-xts:plain64 Ralf <ralf+gentoo@×××××××××××××××××××.de>