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Message-ID: <BLU0-SMTP358ACEE791B4EE6546EE2EFFDF00@phx.gbl>
Date: Sun, 10 Jun 2012 21:43:07 +0200
From: Frank Dittrich <frank_dittrich@...mail.com>
To: john-users@...ts.openwall.com
Subject: Re: External mode: keyboard
On 06/10/2012 09:04 PM, madfran@...-ezine.org wrote:
> I am using jtr 1.7.9 jumbo.
Which jumbo version?
1.7.9-jumbo-5?
Please post the output of this command:
./john |head -n 1
> I am trying to modify the external mode keyboard to meet a cyrilic
> keyboard.
What encoding are you using?
CP1251 aka Windows-1251?
Or koi8-r, or something else, like UTF-8?
For a single byte encoding (cp1251 or koi8-r), creating a cyrillic
keyboard mode should be possible.
Instead of modifying [External:Keyboard], it would have been better to
copy that section to [External:Keyboard-cp1251] or
[External:Keyboard-koi8-r], and adjust the copy.
Then, you could have shared the working result with john-users.
> The modification of the john.conf was done with Microsoft Word and save
> with encoding "Cyrilic Windows"
> See attached part of the modification.
>
> When I try the following command the system fault.
>
> # ./john --format=nt2 --external=Keyboard2 --session=key2 list.txt
> Segmentation fault (core dumped)
The segfault should be fixed (not by you).
But I assume when you define a correct external mode for your code page,
no segfault should occur.
> ************************************************************************
> /*
> * This defines the keyboard layout, by default for a QWERTY keyboard.
> * Please note that the sizes of m[] and mc[] arrays assume 7-bit
> * characters and will need to be doubled for 8-bit characters such as
> * umlauts.
> */
> i = 0; while (i < 0x40) k[i++] = 0;
> k[0] = '`';
> i = 0; while (++i <= 9) k[i] = '0' + i;
> k[10] = '0'; k[11] = '-'; k[12] = '=';
> k[0x11] = 'й'; k[0x12] = 'ц'; k[0x13] = 'у';
> k[0x14] = 'к';
> k[0x15] = 'е'; k[0x16] = 'н'; k[0x17] = 'г';
> k[0x18] = 'ш';
> k[0x19] = 'щ'; k[0x1a] = 'з'; k[0x1b] = 'х';
> k[0x1c] = 'ъ';
All these definitions 'ш'... look wrong to me.
Here is you you should proceed:
Find out which code page you use (koi8-r or cp1251).
Here is the code page layout for cp1251:
http://en.wikipedia.org/wiki/Windows-1251
And here the one for koi8-r:
http://en.wikipedia.org/wiki/KOI8-R
To compare your cyrillic keyboard layout with a US QWERTY layout (for
which the [External:Keyboard] mode has been designed), look here:
http://en.wikipedia.org/wiki/Keyboard_layout
Replace the character which is used in the [External:Keyboard] mode with
the one that is positioned at the same place.
To know what to use as replacement, check the correct code page
mentioned above.
for http://en.wikipedia.org/wiki/KOI8-R, you'll find this information
for б (lower case cyrillic b):
0431
194
You need to remenber the 194.
If you use the Russian Windows keyboard layout, this letter is located
where the comma ',' is located on the US-American keyboard.
So, change
k[0x38] = ',';
in the [External:Keyboard] section to
k[0x38] = 194;
You can also use the hexadecimal value C2, because 0xc2 = 194.
If you prefer that notation, use
k[0x38] = 0xc2;
instead.
Frank
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