On 08/03/16 14:14, Ondrej Kozina wrote:
On 03/08/2016 03:02 PM, lejeczek wrote:
superb, thanks chaps,
on keyfiles, would you know why this:

cryptsetup luksOpen /dev/h300Int1/0 h300Int1.0_crypt
/etc/crypttab.key --keyfile-offset 12


IIUC it seems like missing -d/--key-file option in front of "/etc/crypttab.key" string. Well it also depends on actual content of your /etc/crypttab.key file. Does it really contain backup of your keyslot passphrase (human readable text data)? Or does it contain volume key for your luks device (usually looks like binary data, bunch of random bytes that really should not be human readable:))

Regards
Ondrej
many thanks Onrej,
it seems I got it completely wrong, the concept of it, I thought the keyfile is pure randomness and I just simply pick up a chunk of it with the help of offest. But why then it works fine without offset, with no passphrase in keyfile at any time?

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