From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by mail.saout.de (Postfix) with SMTP for ; Thu, 1 Jul 2010 14:34:24 +0200 (CEST) Content-Type: text/plain; charset="utf-8" Date: Thu, 01 Jul 2010 14:34:23 +0200 From: tesla1@gmx.net Message-ID: <20100701123423.326250@gmx.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [dm-crypt] Recovering/Cracking passphrase List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dm-crypt@saout.de 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! -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01