Date: Tue, 15 Jan 2008 23:41:06 +0300 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: vowels rotating On Tue, Jan 15, 2008 at 08:26:08PM +0100, websiteaccess wrote: > Today I would like make a rule able to change all vowels (aeiouy) in > a word by an other one (aeiouy). > > For example : > > "canape" become : > > canapa > canapi > canapo > .... until > cynepo > cynypy JtR's wordlist rules are not well suited for this task, not even with the preprocessor. You're better off using a Perl script instead - or you may re-consider the task. Why try all of those combinations? I think that most passwords that may be found in this way would also be found by merely replacing any one vowel with another one. Anyway, here's an example of how wordlist rules can be (ab)used to implement what you want, for lengths up to 3 and only considering the five characters [aeiou] as vowels: =0?vo0[aeiou]Q =1?vo1[aeiou]Q =2?vo2[aeiou]Q =0?vo0[aeiou]QM=1?vo1[aeiou]Q =0?vo0[aeiou]QM=2?vo2[aeiou]Q =1?vo1[aeiou]QM=2?vo2[aeiou]Q =0?vo0[aeiou]QM=1?vo1[aeiou]QM=2?vo2[aeiou]Q For greater lengths and for 6 "vowels", this list of rules quickly becomes too long and too slow (each rule would be rejecting most input words as not "belonging" to that rule). So, while in theory wordlist rules can do this, they're not really up to the task in practice. -- Alexander Peslyak <solar at openwall.com> GPG key ID: 5B341F15 fp: B3FB 63F4 D7A3 BCCC 6F6E FC55 A2FC 027C 5B34 1F15 http://www.openwall.com - bringing security into open computing environments Was I helpful? Please give your feedback here: http://rate.affero.net/solar -- To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply to the automated confirmation request that will be sent to you.
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