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Date: Fri, 27 Nov 2020 14:32:11 +0100
From: "Sebastian Reitenbach" <>
Subject: Re: cracking HMAC-SHA1 (key=salt)

Am Freitag, November 27, 2020 14:05 CET, schrieb Solar Designer <>: 
> On Fri, Nov 27, 2020 at 01:58:50PM +0100, magnum wrote:
> > On 2020-11-27 11:52, Sebastian Reitenbach wrote:
> > >Can I crack HMAC-SHA1 (key=salt) hashes with JtR, am I overlooking 
> > >something?
> > 
> > Unfortunately not. We have some old issue for implementing HMAC "salt is 
> > key" but the demand seems low.
> This is:
> "HMAC formats supporting the other ordering of key and data"

thanks to both of you, at least I know now that i haven't overlooked something.
subscribed to the issue.


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