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Message-ID: <CANWtx038w6o+Se+6OS_8v++_QinTL-_NGmX8yMbpFfZ0_bqPZA@mail.gmail.com>
Date: Wed, 2 Sep 2015 09:11:42 -0400
From: Rich Rumble <richrumble@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: plaintext truncation
On Tue, Sep 1, 2015 at 1:41 PM, magnum <john.magnum@...hmail.com> wrote:
> On 2015-09-01 18:31, Rich Rumble wrote:
>
>> On Tue, Sep 1, 2015 at 12:23 PM, magnum <john.magnum@...hmail.com> wrote:
>>
>> This is now implemented (3701702). The following formats got FMT_TRUNC as
>>> of now: DEScrypt, bcrypt, LM, tripcode, nethalflm, netlm, PST, RACF, sapb
>>> and VNC.
>>>
>>> Some more may need it but these should be the most important ones.
>>>
>>> Old-office has a 15 char limit IIRC.
>>
>
> That rings a bell... but IIRC this only applies to some specific
> version(s), not all the ones supported by our oldoffice format. Perhaps it
> applies to '$oldoffice$0'?
>
I'm not sure how many office formats there are, but prior to 2007, 15 was
the limit imposed by M$.
>
> That does not apply to Outlook however, it uses CRC-32 codes and I
>> don't think length matters there.
>>
>
> Apparently it truncates at 8, so it's got FMT_TRUNC already. I think it
> can find a working (although not neccessarily the original) password in 30
> seconds on average, using just one core of my laptop :-)
I know crc32 is quick :) but johns is not as quick as others, still I can't
complain about 30 seconds, though others find "instant" collisions.
-rich
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