[gentoo-user] Re: Kernel upgrade and now LUKS failure

["Stefan G. Weichinger" <lists@xunil.at>]

Am 18.05.2010 15:05, schrieb Jan Engelhardt:
> 
> On Monday 2010-05-17 11:14, Stefan G. Weichinger wrote:
>> Am 16.05.2010 14:36, schrieb Jan Engelhardt:
>>> [Replying to 
>>> http://thread.gmane.org/gmane.linux.gentoo.user/229533/focus=229542 
>>> ]
>>>
>>> Second, it's using echo without the -n parameter, thus implicitly 
>>> inserting a newline into the key -- which is the cause for yoru 
>>> observed mounting problems.
>>>
>>> Third, because you are passing the key via stdin into cryptsetup, it 
>>> only uses the first line of whatever you pipe into it; whereas 
>>> pam_mount uses the entire keyfile as it is supposed to be.
>>> [...]
>> Jan, thanks for your suggestions.
>>
>> I created a new LUKS-volume and tried to avoid all the mentioned
>> pitfalls (I used "echo -n", avoided stdin etc.), but this didn't help here.
> 
> To be sure, use
> 
> 	openssl -d ... | hexdump -C
> 
> to detect newlines in the key. The shell has far too many occasions
> where \n gets stripped or added.

Thanks for the hint.

Could you please show me an example how it should look like and what to
look for?

I get several lines of output, that seems bad ... ?

Maybe I didn't get all the steps right, could be.

Do you know any howto where it is done "the right way"?

Thanks, Stefan