Yeah, here's is an idea. Looks like a table and a simple XOR. Theory:
'encrypted' password is represented as:
[1 nibble][encrypted bytes]
[1 nibble] = starting position into XOR/translation table
So, as an example:
a=285
Would mean:
'starting from position 2 in the table for the algorithm, and password,
encrypted, is 0x85'
And this:
aaa = 0401785
confirms our hyphotesis - 'start from position 0 on the table, 1st char
(pos 0) is 0x40, 2nd (pos 1) is 0x17, 3rd (pos 2) is 0x85' - which is
consistent with our previous observation.
One nibble = 16 possible starting points - so the table will look like:
1234567890123456
ABCDEFGHIJKLMNOPABCDEFGHIJKLMNOPABCDEFGHIJKLMNOPABCDEFGHIJKLMNOP
Keep generating passwords - use 'a' x 48 or similar - reconstruct the
table - try and see if is a XOR or a straight substituion cipher. Good
luck.
Dario
-----Original Message-----
From: barcajax@gmail.com [mailto:barcajax@gmail.com]
Sent: Wednesday, April 26, 2006 2:44 AM
To: pen-test@securityfocus.com
Subject: Re: RE: Password secured using?
Thanks for the various responses I received regarding my
question. As Jim suggested, I tried entering variations of
the password and recorded them down as they appeared in the
config file after I saved them. Here they are.
a=a5b
aa=553c6
aaa=0401785
a=553
aa=9455b
aaa=83e455b
a=285
aa=7073e
aaa=0401785
a=707
aa=a5b40
aaa=9455b40
a=358
aa=9455b
aaa=a5b401
There are consistencies. Single letter password
appears as 3 characters in the config file, two letter shows
up as 5 and three letter as 7. Repeat patterns include
repeating 707, 553, a5b and 040. I did manage to get a
collision where aaa had repeats of 0401785. Any ideas?
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