Re: [PATCH] Make hmac algorithm selection for cookie generation dynamic

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On Tue, Oct 23, 2012 at 02:32:54AM -0400, David Miller wrote:
> From: Neil Horman <nhorman@xxxxxxxxxxxxx>
> Date: Fri, 19 Oct 2012 11:52:06 -0400
> 
> > Currently sctp allows for the optional use of md5 of sha1 hmac algorithms to
> > generate cookie values when establishing new connections via two build time
> > config options.  Theres no real reason to make this a static selection.  We can
> > add a sysctl that allows for the dynamic selection of these algorithms at run
> > time, with the default value determined by the corresponding crypto library
> > config options.  It saves us two needless configuration settings and enables the
> > freedom for administrators to select which algorithm a particular system uses.
> > This comes in handy when, for example running a system in FIPS mode, where use
> > of md5 is disallowed, but SHA1 is permitted.
> > 
> > Note: This new sysctl has no corresponding socket option to select the cookie
> > hmac algorithm.  I chose not to implement that intentionally, as RFC 6458
> > contains no option for this value, and I opted not to pollute the socket option
> > namespace.
> > 
> > Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
> 
> Neil, please use appropriate subject prefixes in your patch
> submissions.  In this case "sctp: " would have been appropriate.
> 
Crap, sorry, Dave, I should know better.  Completely slipped my mind.

Neil

> Vlad, this patch looks fine to me, but I'd like you to review
> it too before I apply it.
> 
> Thanks.
> 
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