From: Milan Broz <mbroz@redhat.com>
To: anirudh takkallapally <anirudh.takkallapally@gmail.com>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] Unlocking volume using master key
Date: Fri, 10 Feb 2012 22:05:05 +0100 [thread overview]
Message-ID: <4F358681.9060506@redhat.com> (raw)
In-Reply-To: <loom.20120210T210035-971@post.gmane.org>
On 02/10/2012 09:11 PM, anirudh takkallapally wrote:
> My question over here is How do we unlock an encrypted volume using the Master
> key? this is without having to add a new passphrase.
Hm, this is interesting... it is possible through libcryptsetup API,
but cryptsetup CLI allows using --master-key-file only in
luksFormat and luksAddKey.
It should be easy to add, if you can add issue on project page
I will add it to next version (for luksOpen).
For now, I think the only "simple" shell solution is to not only
store master key, but whole mapping table
"dmsetup table --showkeys" and activate volume using
dmsetup create <name> --table "<stored table>"
(bypass LUKS completely - can be dangerous if wrongly used).
(in mapping table you can replace device to path to snapshot)
It is not ideal solution though...
Milan
next prev parent reply other threads:[~2012-02-10 21:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-10 20:11 [dm-crypt] Unlocking volume using master key anirudh takkallapally
2012-02-10 21:05 ` Milan Broz [this message]
2012-02-10 23:21 ` anirudh takkallapally
2012-02-11 10:33 ` Milan Broz
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