Gentoo Archives: gentoo-user

From: Hinnerk van Bruinehsen <h.v.bruinehsen@×××××××××.de>
To: gentoo-user@l.g.o
Subject: Re: Aw: Re: [gentoo-user] dm-crypt + ext4 = where will the journal go?
Date: Tue, 04 Sep 2012 17:39:48
Message-Id: 50463C4C.6040602@fu-berlin.de
In Reply to: Aw: Re: [gentoo-user] dm-crypt + ext4 = where will the journal go? by "Roland Häder"
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4 On 04.09.2012 15:48, "Roland Häder" wrote:
5 > I think I made a (tollerateable) mistake:
6 >
7 > My hard drive has two partitions: - sda1 - encrypted swap - sda2 -
8 > encrypted root
9 >
10 > How should it boot? One way could be by external media (e.g.
11 > stick), other is from hard drive. But that is encrypted. So I must
12 > leave a small area left for kernel, initrd, System.map and maybe
13 > config.
14 >
15 > So the page at [1] is a little wrong because it misses the boot
16 > partition, so the new layout should be: - sda1 - unencrypted boot
17 > (/boot) partition - sda2 - encrypted swap (at least as double as
18 > your RAM) (crypt-swap) - sda3 - encrypted root (crypt-root)
19 >
20 > Can someone update this?
21 >
22 > Regards, Roland
23 >
24 > [1]: http://wiki.gentoo.org/wiki/DM-Crypt
25 >
26
27 In theory grub2 is able to open a luks-encrypted volume though it
28 seems to have some disadvantages: you'll need to enter the passphrase
29 (or pass the keyfile) two times, because grub itself needs to decrypt
30 the volume to get the later stages from the encrypted volume and
31 afterwards the decryption in the bootprocess itself takes place.
32
33 I can't give any real advice about it though, because I use an
34 unencrypted boot partition. Depending on your needs it could be an
35 increase of security, because you can stop an attacker from injecting
36 malicious code into your kernel (or replace it completely).
37
38 WKR
39 Hinnerk
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Replies

Subject Author
Re: [gentoo-user] dm-crypt + ext4 = where will the journal go? Florian Philipp <lists@×××××××××××.net>
Re: Aw: Re: [gentoo-user] dm-crypt + ext4 = where will the journal go? Michael Hampicke <gentoo-user@××××.biz>
Re: [gentoo-user] dm-crypt + ext4 = where will the journal go? Neil Bothwick <neil@××××××××××.uk>