Date: Wed, 17 May 2006 04:00:35 +0400 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: Generate chr file from finite character set On Tue, May 16, 2006 at 02:13:44AM +0000, net sec wrote: > Sorry for the newbie question but how would I go about creating a chr file > from a list of finite ASCII characters. (example alpha plus > !@...^&*()-_+=) ? > > I see that I can define an incremental mode section but from the > description, it appears that if I added an 'Extras' section for the purpose > of the additional characters it would treat the additional chars with less > frequency and I want each to have the same weight. That's correct. The primary advantage behind "incremental" mode is that it orders candidate passwords for decreasing estimated probability. It might not be wise for you to override that. However, you can do so by generating a .chr file from a fake john.pot file containing lines like: :a :b ... :z :! :@ My advice remains for you to use the supplied .chr files rather than generate custom ones - unless you have a very good reason for doing things differently. This topic was discussed in here before, so you could want to check out these other postings: http://thread.gmane.org/gmane.comp.security.openwall.john.user/348/focus=376 http://thread.gmane.org/gmane.comp.security.openwall.john.user/345/focus=357 You could also look into using external mode instead of or along with "incremental" mode: http://article.gmane.org/gmane.comp.security.openwall.john.user/414 http://article.gmane.org/gmane.comp.security.openwall.john.user/603 -- Alexander Peslyak <solar at openwall.com> GPG key ID: B35D3598 fp: 6429 0D7E F130 C13E C929 6447 73C3 A290 B35D 3598 http://www.openwall.com - bringing security into open computing environments Was I helpful? Please give your feedback here: http://rate.affero.net/solar
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