Date: Fri, 29 Jul 2011 14:47:51 -0500 From: "jfoug" <jfoug@....net> To: <john-dev@...ts.openwall.com> Subject: John and Code pages (and a new tutorial) I have added quite a few new code pages (all of them from the wiki wish list). I have not fully tested them yet, so have not released a patch. In this patch will be these CP cp437 cp737 cp866 cp850 cp1252 iso-8859-15 I have also made a few changes in the code, to help stream line the process. Speaking of "the process", there is now a wiki tutorial, on how to properly add a CP to john. This tutorial page is at: http://openwall.info/wiki/john/tutorials/add-codepage In this tut, there is a perl script (compute code page), listed as living in ./run directory of john. Well, until I get the patch tested and released this script file will not 'live' in the john run directory. So, this perl script is being attached to this email, so that others can use it, or look at it if they want to. This perl script (cmpt_cp.pl) is written to produce the To/From Unicode array, and also produce two arrays (with 2 others optional) of character data used in case conversions, and character classifications. The script also lists STRANGE characters which will need to be looked at by human. So far, 0xDF is one of these characters, and this one has been talked about recently on the john-dev mailing list. Also, in CP850 0xD1 (which ends up being U+0131) is another of these characters. These may be chars which convert to multiple characters, or is one of them which upcase <-> lowcase does not produce the same character. Again, these will have to be handled case by case, by hand. The script will also list code pages which the low characters (0x00 to 0x7F) do not map into the 'standard' ASCII character set. At this time, there is nothing in the procedure on how to deal with these code pages. It may be very simple to do, but I have not tested out anything (yet). Jim. Content of type "text/html" skipped Download attachment "cmpt_cp.pl" of type "application/octet-stream" (3874 bytes)
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