Am Donnerstag, den 10.06.2010, 15:28 -0500 schrieb Justin Brown:
> Hello,
>
>
> I'm in a really bad situation. Basically, I've lost my passphrase, and
> I'm trying to find a way to recover it. I know what the passphrase
> should be (it's a really good 20 character passphrase), but I must
> have mistyped it when configuring cryptsetup or added some complexity
> which I failed to write down. I've tried about every combination of
> all the passwords and passphrases that I use, and I can't come up with
> anymore, so I'm going to try to build a cracker. I'd like to get some
> feedback before I put a lot of time into writing the code.
I'm in a similar situation. Luckily, the Password is only 5 characters
long.
I try a different approach. I want to use John the ripper for cracking
the password.
Therefore I want to extract the sha1 key and salt from the luks Header.
I don't know if this is possible somehow. Next I want to create a file
from that data that is understood by JTR.
To test this approach I created sha1sums with sha1sum and libssl from a
3 letter word and put them in a password file. However I wasn't able to
crack that password, even with sha1 support compiled into JTR. I guess I
don't have the correct information in the password file and/or it is
wrong formatted.
Any help and suggestions on this approach is welcome!
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