netdev - Re: [PATCH] xfrm: fix hmac(sha256) truncation length

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Sat, 10 Mar 2012 00:45:42 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jarod Wilson <jarod@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Paul Wouters <pwouters@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Martin Willi <martin@...ongswan.org>, netdev@...r.kernel.org,
	linux-crypto@...r.kernel.org
Subject: Re: [PATCH] xfrm: fix hmac(sha256) truncation length

On Fri, Mar 09, 2012 at 08:41:10AM -0500, Jarod Wilson wrote:
>
> Okay, I suspected that might be the case. No plans to ever invert that,  
> so that userspace has to explicitly set the shorter truncbits for  
> backwards compat?

That's up to the userspace implementation.  If its configuration
allows explicit trunc bits then just use whatever the user says.
Otherwise it'll have to make a policy decision.  For example, a
big warning when upgrading and changing the default to the correct
value.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html