netdev - Re: [PATCH cryptodev] crypto: lib/chacha20poly1305

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Message-ID: <CAHmME9p8XNfz1ZdELVFXC4=QY-S6VzJfyf4oREgTM96WJUKeTQ@mail.gmail.com>
Date:   Tue, 17 Nov 2020 09:35:31 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     Antonio Quartulli <a@...table.cc>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        WireGuard mailing list <wireguard@...ts.zx2c4.com>,
        "open list:BPF JIT for MIPS (32-BIT AND 64-BIT)" 
        <netdev@...r.kernel.org>, keyrings@...r.kernel.org,
        linux-security-module <linux-security-module@...r.kernel.org>,
        Antonio Quartulli <antonio@...nvpn.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        David Howells <dhowells@...hat.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH cryptodev] crypto: lib/chacha20poly1305 - allow users to
 specify 96bit nonce

On Tue, Nov 17, 2020 at 9:32 AM Ard Biesheuvel <ardb@...nel.org> wrote:
> If you are going back to the drawing board with in-kernel acceleration
> for OpenVPN

As far as I can tell, they're mostly after compatibility with their
existing userspace stuff. Otherwise, if they were going back to the
drawing board, they could just make openvpn userspace set up xfrm or
wg tunnels to achieve basically the same design. And actually, the
xfrm approach kind of makes a lot of sense for what they're doing; it
was designed for that type of split-daemon tunneling design.