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From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] Option "validate passphrase" for command cryptsetup
Date: Tue, 19 Jun 2012 14:29:16 +0200	[thread overview]
Message-ID: <20120619122915.GA1317@tansi.org> (raw)
In-Reply-To: <4FE061DE.5080200@gmail.com>

I think having this functionality is a good idea.

Arno


On Tue, Jun 19, 2012 at 01:26:22PM +0200, Milan Broz wrote:
> On 06/19/2012 12:53 PM, Louis wrote:
> > 	Hello,
> > 	for information, I wrote a small C program to check if the given
> > passphrase is correct, without doing anything on the disk. The command
> > is used this way:
> 
> > 	If you think it can benefit cryptsetup, I offer to write the necessary
> > patch to include it to cryptsetup (as a "luksValidateKey" LUKS action).
> 
> Special program or command is IMHO overkill, isn't enough just to add option
> to cryptsetup luksOpen (--dry-run, --no-activate, whatever you prefer)?
> 
> So it will work just like
> 
> # cryptsetup luksOpen /dev/sdc anything --dry-run --verbose
> Enter passphrase for /dev/sdc: 
> No key available with this passphrase.
> Enter passphrase for /dev/sdc: 
> Key slot 0 unlocked.
> Command successful.
> 
> Trivial to add to code... (while I am doing another RC today, it can be done
> today even ;-)
> 
> Milan
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt
> 

-- 
Arno Wagner,    Dr. sc. techn., Dipl. Inform.,   Email: arno@wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
One of the painful things about our time is that those who feel certainty 
are stupid, and those with any imagination and understanding are filled 
with doubt and indecision. -- Bertrand Russell 

  reply	other threads:[~2012-06-19 12:29 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-19 10:53 [dm-crypt] Option "validate passphrase" for command cryptsetup Louis
2012-06-19 11:26 ` Milan Broz
2012-06-19 12:29   ` Arno Wagner [this message]
2012-06-19 13:41     ` Milan Broz
2012-06-19 13:54       ` Thomas Bächler
2012-06-19 14:17         ` Milan Broz
2012-06-19 14:56           ` Matthias Schniedermeyer
2012-06-19 16:20             ` ken
2012-06-19 22:02         ` Heinz Diehl
2012-06-19 15:04   ` jonas
2012-06-19 16:14     ` Milan Broz
2012-06-19 16:46       ` Jonas Meurer
2012-06-20  1:13       ` Arno Wagner
2012-06-19 16:56 ` ken
2012-06-20  7:41   ` Louis
2012-06-20  8:27     ` Milan Broz

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