Re: [dm-crypt] cryptsetup won't accept password after normal reboot

From: wucherpfennig <studhalter.daniel@bluewin.ch>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] cryptsetup won't accept password after normal reboot
Date: Tue, 09 Feb 2010 08:42:56 +0100	[thread overview]
Message-ID: <hkr3lt$63b$1@ger.gmane.org> (raw)
In-Reply-To: <a72d33331002050648t771d3d20s416f076f4edd59ae@mail.gmail.com>

Am 05.02.2010 15:48, schrieb Ma Begaj:
> 2010/2/5 wucherpfennig<studhalter.daniel@bluewin.ch>:
>> Am 04.02.2010 14:49, schrieb Arno Wagner:
>>>
>>> On Thu, Feb 04, 2010 at 10:21:26AM +0000, wucherpfennig wrote:
>>>>
>>>> First: I'm sorry for this strange topic behaviour, but I don't know how
>>>> to
>>>> write real answers (I tried in the test list, but didn't work either).
>>>>
>>>>> I gahther this is a new installation and you would only lose
>>>>> a few hours of configuration work, correct?
>>>>
>>>> No. It was a fully working installtion. I wouldn't car that much about
>>>> this problem, but I wanted to backup my stuff last weeekend (old backup
>>>> was messed up). So basicly I'm standing here without any backup from the
>>>> last few years...
>>>
>>> So you unlocked it sucessfully a number of times and suddenly
>>> this does not work anymore? Any changes, like a different
>>> keyboard?
>>
>> Yes and No, I didn't change anything... Thats why I think it has to be
>> something with the keyboard...
>>
>>>>> For example if
>>>>> you have, say, 12 characters and 9 of them are the same on most
>>>>> keymaps, then you could try a direct brute force.
>>>>
>>>> I had the same idea last night. although my password is about 20
>>>> characters long a brute force attack shouldn't take too long, because
>>>> there are 4 special Chars [eg ()_-] and 8 numbers. Letters shouldn't be
>>>> the problem, numbers too...
>>>
>>> Letters, except 'y' and 'z'. Numbers should be the same.
>>> Specials you will have to try some alternatives.
>>>
>>> Sounds doable.
>>>
>>> Arno
>>
>> I avoided y z, so there should be no problem... Any suggestions how to go on
>> further?
>>
>
> Why don't you made a custom initrd image which would print out what
> you type to be sure that you use right password. You just need to
> catch password with "read" and print it out.
>
> I have such an image somewhere and I could send/modify it if you are
> not able to make it yourself. You would just need to put in your
> lilo.conf or whatever boot manager you use.
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>

Well, I don't know if thats necessary. If it doen't work from a live cd 
why should it work with a diffrent initrd image...?