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Date: Sun, 31 May 2015 16:09:34 +0200
From: Marek Wrzosek <marek.wrzosek@...il.com>
To: john-users@...ts.openwall.com
Subject: Re: Bleeding jumbo now defaults to UTF-8
Let's summarize what have changed. Before defaulting to UTF-8 in
john.pot were plain-texts and there was possible to use many encodings
in one wordlist. Moreover plain-texts were known, but information about
human-readable form of passwords was gone. After change john can use
only single-encoding wordlists, stores human-readable passwords in
john.pot, but plain-texts are gone and one will need to repeat cracking
passwords using many different target encodings. Just defaulting to
UTF-8 have solved some issues but have created new ones.
Maybe there should be some smart "auto" target encoding, that will check
password candidates (in UTF-8 only) if there are any two-byte codes and
if all are from the same alphabet (e.g. Cyrillic) then this password
would be checked using all possible encoding for those characters (e.g.
KOI8-R, CP1251 and of course UTF-8). Any other situations (all ASCII or
many different alphabets in one password) and UTF-8 will be assumed.
This additional target encoding would be turned-on on demand because
there will be some performance issues.
If for cracking password was used other encoding than UTF-8 (if
--target-encoding was used) than john will save this information in some
additional pot file (for backward compatibility reasons) using e.g.
plain-text or name of encoding. Information about encoding would be
displayed when -show option was in use.
It's just a thought. Maybe someone here will have a better idea for
solving those issues.
Best Regards
--
Marek Wrzosek
marek.wrzosek@...il.com
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