netdev - Re: [PATCH net-next] [RESEND] wireguard: disable in FIPS mode

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Message-ID: <20210409021121.GK2900@Leo-laptop-t470s>
Date:   Fri, 9 Apr 2021 10:11:21 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     Eric Biggers <ebiggers@...nel.org>
Cc:     netdev@...r.kernel.org, "Jason A . Donenfeld" <Jason@...c4.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Ondrej Mosnacek <omosnace@...hat.com>,
        linux-crypto@...r.kernel.org
Subject: Re: [PATCH net-next] [RESEND] wireguard: disable in FIPS mode

On Thu, Apr 08, 2021 at 08:11:34AM -0700, Eric Biggers wrote:
> On Thu, Apr 08, 2021 at 07:58:08PM +0800, Hangbin Liu wrote:
> > On Thu, Apr 08, 2021 at 09:06:52AM +0800, Hangbin Liu wrote:
> > > > Also, couldn't you just consider WireGuard to be outside your FIPS module
> > > > boundary, which would remove it from the scope of the certification?
> > > > 
> > > > And how do you handle all the other places in the kernel that use ChaCha20 and
> > > > SipHash?  For example, drivers/char/random.c?
> > > 
> > > Good question, I will check it and reply to you later.
> > 
> > I just read the code. The drivers/char/random.c do has some fips specific
> > parts(seems not related to crypto). After commit e192be9d9a30 ("random: replace
> > non-blocking pool with a Chacha20-based CRNG") we moved part of chacha code to
> > lib/chacha20.c and make that code out of control.
> > 
> So you are saying that you removed drivers/char/random.c and lib/chacha20.c from
> your FIPS module boundary?  Why not do the same for WireGuard?

No, I mean this looks like a bug (using not allowed crypto in FIPS mode) and
we should fix it.

Thanks
Hangbin