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Message-ID: <20090725145530.GA8286@openwall.com>
Date: Sat, 25 Jul 2009 18:55:30 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: charset with é è à ç
On Sat, Jul 25, 2009 at 02:29:30PM +0200, websiteaccess wrote:
> 1) I formatted my john.pot as following (only 1 line)
> 098f6bcd4621d373cade4e832627b4f6:abcdefghijklmnopqrstuvwxyzéèàç
This is fine, although you did not need to include any hash before the
string of chars - a mere colon would do.
> 2) inserted in the John.cof
[...]
This is normally done after you have generated a .chr file, although it
is also OK to do this in advance like you did.
> 3) do ./john -make-charset:alphafr.chr
[...]
> Successfully written charset file: alphafr.chr (26 characters)
> ---------------------------------------
>
> "é" "è" "à" "ç" have not been included in the charset :(
Indeed. They are 8-bit characters, which are outside of the range
supported for "incremental" mode by default.
> how can do to get a charset with "è" "è" "à" "ç" and a-z ?
If you really want to do it the way you tried to, then there's just one
step you missed. You need to modify params.h as shown in this posting:
http://www.openwall.com/lists/john-users/2008/03/17/1
Then recompile JtR and try again - it should work.
However, since you don't seem to care to use the "incremental" mode for
real anyway (that is, let its .chr file generation code examine some
previously-cracked passwords or at least a wordlist), I suggest that you
opt for a simpler approach. One of those would be to define a mode like:
[Incremental:Alpha-fr]
File = $JOHN/alpha.chr
MinLen = 1
MaxLen = 8
CharCount = 30
Extra = éèàç
This requires a recompile for the 8-bit chars too, but it does not
require you to generate a custom .chr file. The 4 extra chars will be
treated as the least likely, yet this shouldn't bother you.
An even simpler approach, not requiring a recompile, would be to use the
DumbForce external mode sample, configuring it for your desired charset.
In the init() function, you'll specify:
i = 0;
c = 'a';
while (c <= 'z')
charset[i++] = c++;
charset[i++] = 'é';
charset[i++] = 'è';
charset[i++] = 'à';
charset[i++] = 'ç';
replacing the existing lines (many of them) defining another charset
after the "This defines the character set." comment.
Alexander
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