Date: Sun, 16 Dec 2012 20:11:50 +0100 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: Run-time change of a format's max length On 14 Dec, 2012, at 3:23 , magnum <john.magnum@...hmail.com> wrote: > On 13 Dec, 2012, at 2:30 , Solar Designer <solar@...nwall.com> wrote: >> On Thu, Dec 13, 2012 at 02:20:10AM +0100, magnum wrote: >>> On 13 Dec, 2012, at 1:15 , Solar Designer <solar@...nwall.com> wrote: >>>> Shouldn't this option be called --max-length instead, and we'd have >>>> --min-length too? >>> >>> That has crossed my mind too, I should change it. >> >> Yes, please. They're called that way on my to-do list. ;-) >> >>> This would let us run incremental with a length range without having to define a temporary in john.conf. Is there any other use of min lengths? Markov mode perhaps. >> >> For example, excluding too short passwords with a wordlist run, assuming >> that those are (to be) searched exhaustively with incremental mode. > > All the above are done & committed now, except Wordlist and Single mode. Two new variables were added to External: req_minlen and req_maxlen and these are now used in most External modes in john.conf (still together with cipher_limit). Markov and Incremental work fine. A couple of things are now obsolete or redundant: > > * The various length-variants of Incremental, eg. All7. This can now be specified at will, without hacking john.conf. > * The various length-variants of External:Double. > * The length-range given with the --markov=OPTIONS blob. They can co-exist but if both are given we should bail out with error. > > This obviously needs some regression testing but everything seems to work fine and it's not that intrusive. I love this patch. More patches has been committed, tweaking wordlist with or without rules. --max-length now skips rather than truncates. Wordlist mode will skip words at buffer load already, if that is in use. magnum
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