From: Milan Broz <mbroz@redhat.com>
To: Marek Stopka <mstopka@opensuse.org>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] LUKS password forgoten, any way how to change it?
Date: Sat, 06 Mar 2010 19:57:51 +0100 [thread overview]
Message-ID: <4B92A5AF.4040601@redhat.com> (raw)
In-Reply-To: <ab6ee74d1003051612j3468bf10n97fa92251a07fab6@mail.gmail.com>
On 03/06/2010 01:12 AM, Marek Stopka wrote:
> Hi guys, I have forgotten password to my luks encrypted disk, I have
> lost no data (yet :) ), because system is still running with unlocked
> device, but problem is, that I have a scheduled hardware maintanance
> window quite soon, so I was wondering is it somehow easily possible to
> luksAddKey without knowing a password or recover password from memory
> or it will be much more easier to copy those data somewhere else and
> create a new encrypted disk? It is like 12TB of data so I would really
> prefer not to copy those data somewhere else, but if I will have to, I
> can pull that off...
>
> But I am wondering since key need to be in a memory somewhere there
> could be a way... :)
If the encrypted device is active and you are root...
dmsetup table --showkeys
recode master key from the table (from hexa) into binary and store to file
cryptsetup luksAddKey --master-key-file <file above>
(with cryptsetup 1.1.0)
Milan
next prev parent reply other threads:[~2010-03-06 18:58 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-06 0:12 [dm-crypt] LUKS password forgoten, any way how to change it? Marek Stopka
2010-03-06 12:16 ` Gilles PIETRI
2010-03-06 15:39 ` Marek Stopka
2010-03-06 17:52 ` Bryan Kadzban
2010-03-06 14:58 ` Heinz Diehl
2010-03-06 18:57 ` Milan Broz [this message]
2010-03-06 20:18 ` Heinz Diehl
2010-03-06 20:41 ` Milan Broz
2010-03-06 21:04 ` Arno Wagner
2010-03-06 21:01 ` Arno Wagner
2010-03-06 22:07 ` Heinz Diehl
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