Date: Sun, 8 Jul 2012 19:42:07 +0200 From: Frank Dittrich <frank_dittrich@...mail.com> To: john-dev@...ts.openwall.com Subject: Name space for dynamic_* formats (1001-1999 / 2000-9999) The comment in dynamic.conf states that formats up to dynamic_999 (0-999) are reserved for built-in functions. Formats dynamic_1001 - dynamic_1010 are defined in dynamic.conf. (Earlier releases didn't contain dynamic_1010.) So there is a risk that names used for new formats created by a user might conflict with new formats that get distributed with new jumbo releases. We might need to rephrase the comments at the start of dynamic.conf, to make the users aware of these possible conflicts. doc/DYNAMIC_SCRIPTING needs updates for other reasons as well, but what I want to address right now is: [List.Generic:dynamic_NUM] You replace the NUM with the sub-format number (from 1001 to 9999). Pick a number that is not used. May be we need to adjust the suggestion. What about: "The sub-format numbers from 1000-1999 will be used to distribute new dynamic formats (defined in dynamic.conf) in future john (jumbo) releases. To avoid naming conflicts, users should use sub-format numbers 9000-9999 for their own dynamic formats." That way we leave open what should happen with names 2000-8999. May be we later suggest users who are not developers can use format numbers 2000-2999 to post their own dynamic formats to john-users, for possible inclusion in future jumbo releases. But I think there are some problems when you try to use format numbers > 1999. When I renamed dynamic_1002 to dynamic_2002 (you have to "rename" the test cases as well), --list=subformats (as well as the deprecated --subformat=list) will list that format as the last user-specific format: ... UserFormat = dynamic_1009 type = dynamic_1009 md5($s.$p) (RADIUS Responses) UserFormat = dynamic_1010 type = dynamic_1010 RAdmin v2.x MD5 UserFormat = dynamic_2002 type = dynamic_2002 md5(md5(md5(md5(md5($p))))) This also works: $ ./john --test --format=dynamic_2002 Benchmarking: dynamic_2002 md5(md5(md5(md5(md5($p))))) [128/128 SSE2 intrinsics 10x4x3]... DONE Raw: 926040 c/s real, 935393 c/s virtual But these --list=format-details and --list=format-all-details don't include dynamic_2002: $ ./john --list=format-details |grep _2002 $ ./john --list=format-all-details |grep _2002 So, before suggesting to use numbers > 1999, we need to make sure that --list-format-details and --list=format-all-details work for sub-format numbers 2000-9999. Frank
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