Re: [dm-crypt] LUKS Header crruption

[Robert Nichols <rnicholsNOSPAM@comcast.net>]

The key material is quite deliberately made just the opposite of redundant. It is artificially inflated (typically 4000X) to occupy a larger area of the disk, and in such a manner that successfully erasing any portion of that area makes the key unrecoverable.

-- 
Bob Nichols     "NOSPAM" is really part of my email address.
                 Do NOT delete it.

On 7/29/19 7:08 AM, Konstantin V. Gavrilenko wrote:
> Thanks Arno, thought so :(
> Its a real pity that metadata is not redundant in luks v1.
> 
> Regards,
> Konstantin
> 
> 
> 
> ----- Original Message -----
> From: "Arno Wagner" <arno@wagner.name>
> To: dm-crypt@saout.de
> Sent: Sunday, 28 July, 2019 11:00:49 PM
> Subject: Re: [dm-crypt] LUKS Header crruption
> 
> Hi Konstantin,
> 
> sorry, you data is gone. You overwrote the start of the first
> key-slot and there is no way to recover from that without backup.
> 
> One of the reasons why I think RAID superblocks at the start of the
> device (and even more so at 4kB offset) are messed up and a sign
> of clueless designers.
> 
> Regards,
> Arno