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Message-ID: <20060526171144.GA8532@openwall.com>
Date: Fri, 26 May 2006 21:11:44 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: how decrypt that ?
On Fri, May 26, 2006 at 10:17:35AM +0200, websiteaccess@...il.com wrote:
> How decrypt "30a5f49ccefde0a213536bf2d7d5300d" with AD ?
Strictly speaking, John the Ripper does not "decrypt" anything - rather,
it cracks password hashes by finding suitable plaintext passwords.
The above encoding could correspond to one of many different hash types -
or it could be not a hash at all, indeed. There are several hash types
that John the Ripper with the jumbo patch supports that would use a hash
encoding like the above, so you have to find out (or guess) and specify
the hash type explicitly. The likely guess is that this is hex-encoded
raw MD5 - because it is so popular with web forums, etc.
So we place this in a file of the correct format, like this:
user:30a5f49ccefde0a213536bf2d7d5300d
Then we run jumbo patched John on the file, assuming that "pw" is the
filename:
./john --format=raw-md5 pw
After a minute or so, we get:
nermad (user)
So the password is "nermad". Later, we can do:
./john --show --format=raw-md5 pw
to retrieve the previously cracked password, which obviously gives:
user:nermad
1 password hash cracked, 0 left
--
Alexander Peslyak <solar at openwall.com>
GPG key ID: B35D3598 fp: 6429 0D7E F130 C13E C929 6447 73C3 A290 B35D 3598
http://www.openwall.com - bringing security into open computing environments
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