Date: Sun, 11 Dec 2016 20:05:11 +0100 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Need a little help cracking one password On 2016-12-11 09:47, Patrick Proniewski wrote: > On 11 déc. 2016, at 06:43, Robert Moskowitz wrote: >> I know the password is 10 characters long. >> >> I know that the first position is either 'x' or 'X'. >> The second is a digit, as is the third. >> The forth is alpha, and I don't know the case. >> The fifth is either 'q' or 'Q' >> and soforth (either digit, some alpha, or a specific alpha of either case) > > > With a recent Jumbo version, you can use --mask attack mode: > > ./john -1=[?u?l?d] --mask=[xX]?d?d?[a-zA-Z][qQ]?1?1?1?1?1 /path/to/passwdfile > > (I'm not sure for the non-Jumbo version, but it might work too). Jumbo is needed. Hopefully you actually know the 6th..10th positions a bit more specific than you wrote here, and then you might have a chance (i.e. replacing the ?1 in Patrick's example with as narrow mask per position as possible). If not, the keyspace with the mask Patrick wrote ends up as 2*10^2*52*2*62^5 and assuming this is sha512crypt that would take (literally) a hundred years on a laptop. magnum
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