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Date: Tue, 10 Jul 2012 08:22:44 -0500
From: "jfoug" <jfoug@....net>
To: <john-dev@...ts.openwall.com>
Subject: RE: request for new dynamic subformats
Format's 35,36,37 are on hold, at this time (possibly the dynamic). There
may be some issues in the dynamic format I need to work out.
They 'do' work (for me), if you add the MGF_NOTSSE2Safe flag.
Note, I think they will work on a system, if built with SSE2, if SHA_PARA is
set (i.e. intrinsic SHA1). For my 32 bit builds, it is not.
I think there are problems within dynamic, when MD5_PARA is set, but
SHA1_PARA (or MD4_PARA) is not. I will dig in. If this ends up being true,
then likely I will make changes in the format loader part of dynamic to
detect this situation, and simply 'force' add not-sse safe, if at run time I
detect this. I am not sure why they pass self test vectors however. In the
TS, they only crack 1 hash (the very first), on my build. But in
SSE-not-safe, they catch them all.
However, on my box, speed drops from 6500k to 2500k, if I switch over to
oSSL (not-sse), so I really want to not have to do that. I have not had
time to research this fully, and it may end up being a non-issue, where I
find something else amiss. But I have a strong feeling that it is in some
of the string appending code not working properly, in the mixed para mode.
Jim.
>-----Original Message-----
>From: jfoug [mailto:jfoug@....net]
>Sent: Tuesday, July 10, 2012 12:25 AM
>To: john-dev@...ts.openwall.com
>Subject: RE: [john-dev] request for new dynamic subformats
>
>Here are the other 2 formats:
>
>Dyna_37 == sha1(lc($u).$p)
>Dyna_38 == sha1($s.sha1($s.sha1($p))) wolt3bb
>
>These can go to all trees, including J7-rc.
>
>Jim.
>
>>-----Original Message-----
>>From: jfoug [mailto:jfoug@....net]
>>Sent: Monday, July 09, 2012 4:56 PM
>>To: john-dev@...ts.openwall.com
>>Subject: RE: [john-dev] request for new dynamic subformats
>>
>>>From: magnum [mailto:john.magnum@...hmail.com]
>>>Sent: Monday, July 09, 2012 4:03 PM
>>>To: john-dev@...ts.openwall.com
>>>Subject: Re: [john-dev] request for new dynamic subformats
>>>
>>>Committed to magnum-jumbo and downstream. Actually I guess we could
>>>put it in -fixes too, no?
>>>
>>
>>I would say yes.
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