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Date: Tue, 16 Sep 2014 19:33:24 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: attacking RC2 40-bit S/MIME encrypted emails
On 2014-09-16 19:04, augustin@...nmailbox.org wrote:
> Hi,
>
> long time ago, Bruce Schneier published a tool for Windows 95 to attack
> S/MIME encrypted emails that use RC2 for encryption with 40bit long keys.
>
> https://www.schneier.com/smime.html
>
> code:
> https://www.schneier.com/smime-download.html
>
> I had a look at john formats but did not find anything related. Does
> john support that type of encryption or will it be supported in the future?
It doesn't, and I doubt anyone was planning to write it. Is RC2/40 still
used at all anywhere? Are there sample plaintexts available somewhere,
to be used as test vectors?
If nothing else this could be an excercise for someone wanting to
practice writing a format - and I would include it in Jumbo if published
(and licensed correctly).
magnum
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