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Re: Changing pass-phrase on dm-crypt'ed disks



Hello Nick,

Nick Boyce <nick@glimmer.adsl24.co.uk> wrote:
> On Tuesday 26 Jun 2012 10:47:50 Claudius Hubig wrote:
> 
> > If you do luksAddKey, you’ll have to enter one of the old
> > passphrases. After that, you can try unlocking the volume with the
> > new passphrase. If that succeeds, you can use luksKillSlot to remove
> > the first slot.
> 
> luksDelKey or luksKillSlot ?
> I don't yet understand the relationship between them, nor when it is necessary 
> to "kill a key slot".

Neither do I and the manpage doesn’t make that very clear either.
 
> Um ... I'd have to be in single-user mode then I guess ... assuming there's 
> even enough software in /boot (and/or the initramfs) to fiddle with unmounted 
> encrypted root filesystems.

Then first add the new key, reboot, check if the new key works, and
then delete the old one. That should work. I don’t think the
cryptsetup contained in the initramfs can do all that.

Best regards,

Claudius
-- 
"I say we take off; nuke the site from orbit.  It's the only way to be sure."
		-- Corporal Hicks, in "Aliens"
http://chubig.net                          telnet nightfall.org 4242

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