From: Milan Broz <mbroz@redhat.com>
To: Paul Menzel <pm.debian@googlemail.com>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] How can a passphrase be incorrect even after `luksHeaderBackup` and `luksHeaderRestore`?
Date: Fri, 05 Aug 2011 04:20:40 +0200 [thread overview]
Message-ID: <4E3B5378.2070003@redhat.com> (raw)
In-Reply-To: <CAOOH3prY2scQMY9MPv0n31S+vAYoSEgWCyz+3pNa7HNN-U76sQ@mail.gmail.com>
On 08/05/2011 01:18 AM, Paul Menzel wrote:
> % sudo md5sum /tmp/*header
> 7b897c620776f549324810a8aeb9921e /tmp/sda2.header
> 7b897c620776f549324810a8aeb9921e /tmp/sda.header
> ce314509007b2c76eb85e7b89ee25da5 /tmp/sdb.header
> ------- 8< --- entered commands --- >8 -------
>
> I would have assumed that all files are identical, i. e. they have the
> same hash.
It should be the same.
(But there is gap between header and keyslot which is explicitly wiped
during backup. But from the commands you run it should be the same now.)
On which binary offsets it differs?
Can you try the same exercise but running it through loop device?
(dd e.g. 4M from both sd[ab] disks, map it to loop devices and run the same
commands - luksHeaderBackup/Restore.
Do you see the same problem?
Milan
next prev parent reply other threads:[~2011-08-05 2:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-04 21:31 [dm-crypt] How can a passphrase be incorrect even after `luksHeaderBackup` and `luksHeaderRestore`? Paul Menzel
2011-08-04 23:18 ` Paul Menzel
2011-08-05 2:20 ` Milan Broz [this message]
2011-08-05 8:41 ` Paul Menzel
2011-08-05 12:11 ` Paul Menzel
2011-08-05 14:16 ` Milan Broz
2011-08-05 14:52 ` Arno Wagner
2011-08-05 14:55 ` Arno Wagner
2011-08-05 17:47 ` Milan Broz
2011-08-05 15:02 ` Paul Menzel
2011-08-05 15:08 ` Arno Wagner
2011-09-01 19:08 ` Paul Menzel
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