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Date: Mon, 6 Jul 2009 16:06:32 +0200
From: SL <auditor@...chat.de>
To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com>
Subject: Re: patch for new john format: phpass (also works for phpBBv3)
"Jim" <jfoug@....net> wrote:
> For admins running phpBB who do not know, the hashes are stored in
> the phpbb3_users table. The hash is slightly modified from the
> portable phpass format. The difference is only in the first 3 bytes
> (the signature). phpass hash uses $H$ while phpBB uses $P$. Other
> than that, they are identical, and encrypt/decrypt the same. This
> john format works with both native phpass or phpBB. phpBB prior to
> v3 uses raw md5 for passwords. If you have upgraded, from a board
> running v2, to v3, the passwords are not converted UNTIL a user logs
> in, so there will also likely be many passwords stored simply as non-
> salted MD5, and the raw-md5 hash can be used for them, and is MUCH
> faster.
On a dualcore system, you may start a parallel cracking session for
both hash types simultaneously:
#!/bin/bash
DB=phpBB;
prefix=phpbb3;
mysql -u root -D "$DB" -e "SELECT username, user_password FROM $
{prefix}_users;" | tr "\t" ":" > ${DB}_${prefix}_users.passwd;
(./john --format=raw-MD5 --session=raw-MD5 ${DB}_${prefix}
_users.passwd &);
(./john --format=phpass-MD5 --session=phpass-MD5 ${DB}_${prefix}
_users.passwd &);
Do "killall john" when you get tired waiting for results.
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