linux-kernel - Re: [RFC PATCH 2/8] crypto/krb5: Provide Kerberos 5 crypto through AEAD API

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Message-ID: <493307.1737102616@warthog.procyon.org.uk>
Date: Fri, 17 Jan 2025 08:30:16 +0000
From: David Howells <dhowells@...hat.com>
Cc: dhowells@...hat.com, Herbert Xu <herbert@...dor.apana.org.au>,
    Chuck Lever <chuck.lever@...cle.com>,
    Trond Myklebust <trond.myklebust@...merspace.com>,
    "David S. Miller" <davem@...emloft.net>,
    Marc Dionne <marc.dionne@...istor.com>,
    Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
    Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
    linux-crypto@...r.kernel.org, linux-afs@...ts.infradead.org,
    linux-nfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
    netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/8] crypto/krb5: Provide Kerberos 5 crypto through AEAD API

David Howells <dhowells@...hat.com> wrote:

> > rfc8009 is basically the same as authenc.
> 
> Actually, it's not quite the same :-/
> 
> rfc8009 chucks the IV from the encryption into the hash first, but authenc()
> does not.  It may be possible to arrange the buffer so that the assoc data is
> also the IV buffer.

Actually actually, it's the starting IV, so I just need to chuck in a block of
zeroes.

David