Date: Sun, 31 Jan 2016 13:48:10 -0500 From: japhar81 <japhar81@...il.com> To: john-users@...ts.openwall.com Subject: Re: Cracking luks volume Luks uses PBKDF2 which makes it very slow to crack.. That said, you can try this; 1. run luks2john <file/disk> > luksdump to generate the file 2. create a john.pot that has your possible combinations, like this: :F6TgW8D8F6TgW8D8F6TgW8D8! :F6TgW8D8!F6TgW8D8#F6TgW8D8!# :F6TgW8D8F6TgW8D8F6TgW8D8#! :f6TgW8D8!f6TgW8D8f6TgW8D8#! Note the : is important 3. Generate a chr file from that via: john --make-charset=custom.chr 4. Add a new mode in john.conf; [Incremental:Custom] File = $JOHN/custom.chr MinLen = 27 MaxLen = 30 5. Run it with john --incremental=Custom luksdump Again, this will probably take an absurdly long time unless you have a LOT of horsepower behind it, and even then, not sure you'll get it. I've been toying with a 340-core amazon cluster lately to crack a rar file of mine, if you'd like me to take a swipe at yours, I can try throwing a few hours of cluster time at it, just ping me off-list. On Sun, Jan 31, 2016 at 11:34 AM, Daniel Sorry <santaftw123@...il.com> wrote: > Hello :) > > I was migrating my encrypted luks volume and decided to change password > while I was at it... > I'm sure I know the password but apparently I don't. > I had this problem just after creating it, managed to get open it and was > like ohh, was that combination and went to bed. > > Manually tried about 20 combinations but quickly realized I need it > automated as I was writing combinations down by hand. > > Its a random 27-30 char password, no words, numbers, special chars etc. > > I'm a windows guy but managed to check that key 1 is enabled, so I only > deleted the old key 0, should just be a matter of trying combinations based > on what i know should be the password. > > Here's an example structure of how the password looks and various > combinations it needs to try. > > I take an 8-9 char password like: F6TgW8D8 or F6TgW8D8! > I thought i did it like: F6TgW8D8F6TgW8D8F6TgW8D8! > Or perhaps F6TgW8D8!F6TgW8D8#F6TgW8D8!# > Or F6TgW8D8F6TgW8D8F6TgW8D8#! > Or f6TgW8D8!f6TgW8D8f6TgW8D8#! > > Maybe i was tired and entered a small char twice or something but it should > only contain the chars I know it should have, i just cant for my life find > the correct combination. > > What can be done here ? > I'm i fucked ? > > I have no coding skills and limited scripting skills (Pretty much edit > stuff) > > It's a persistent tails volume, if that matters. :) > > I'm pretty techincal on the windows side and I learn fast on linux! > I dont mind paying/donate to get it open :) > > Thanks! >
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