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Date: Tue, 01 Sep 2015 18:23:46 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: plaintext truncation

On 2015-09-01 09:14, magnum wrote:
> On 2015-08-13 20:57, Solar Designer wrote:
>> On Thu, Aug 13, 2015 at 09:09:06PM +0300, Solar Designer wrote:
>>> To implement this, we probably need to introduce a new format flag.
>>> Should we call it FMT_TRUNC?  And what should it mean - target system's
>>> truncation or JtR's truncation at a length below the target system's?
>>
>> OK, I think it should be FMT_TRUNC and it should mean the target
>> system's truncation, which JtR will replicate (like it does now).
>>
>> When that flag is not set, JtR will no longer truncate (it will skip),
>> so the name FMT_TRUNC will make sense (truncate when this flag is set,
>> and do not truncate but rather skip when it is not).
>
> So eg. LM will have FMT_TRUNC whereas our NT format will not.
>
> I opened an issue for this, #1724

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.

magnum

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