Date: Mon, 9 Feb 2009 07:20:23 +0000 From: P PO1434 <p2409@...mail.com> To: <john-users@...ts.openwall.com> Subject: 2 known letters + wordlist word --> is new format definition best way? Hello there John users I'm really enjoying my foray into John at the moment. Thanks to Alexander and all contributors. I have a question regarding a long list of partially known passwords that use a simple MD5 hash. In my case, I know the first 2 characters (digits), however I would like john to use the wordlist for the remaining characters. My options seemed to me to be: 1) Make a new rule in [List.Rules:Single] ^[0-9]^[0-9] This worked quite well, but of course not I'm not using the known digits, so 100 x slower than necessary. 2) Make an external/incremental rule like the one in the wiki that forces the 2 digits in at the front, then goes through every combination of alpha letters. Not very efficient, given I expect the word will be in list. 3) Write a xxx_fmt.c based on rawMD5go_fmt.c Struggling with this at the moment, but it looks like the best option (?) My questions are: a) Am I even barking up the right tree creating a new xxx_fmt.c based on rawMD5go_fmt? b) If a new fmt is the right way, will it be a matter of just 'overriding' the set_key function? c) Is it possible/correct to create external rules that use a wordlist, or are these rules just exhaustive searches? Thanks for any info people can provide.. Cheers Pete Get what you want at ebay. Get rid of those unwanted christmas presents! _________________________________________________________________ Want to marry your mail? Combine your email accounts here! http://livelife.ninemsn.com.au/article.aspx?id=633386
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