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Date:   Fri, 14 Apr 2023 19:04:54 +0800
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     David Howells <dhowells@redhat.com>
Cc:     Chuck Lever III <chuck.lever@oracle.com>,
        Scott Mayhew <smayhew@redhat.com>,
        Ard Biesheuvel <ardb@kernel.org>,
        Jeff Layton <jlayton@kernel.org>,
        Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
        "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
Subject: Re: Did the in-kernel Camellia or CMAC crypto implementation break?
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On Fri, Apr 14, 2023 at 11:34:37AM +0100, David Howells wrote:
>
> In krb5, for encryption, there are two keys, not one, and no IV to be passed
> in.  The code I have will insert a confounder and a checksum, which must have
> space allowed for it.

Two keys is not an issue.  Authenc for example supports two keys
by encoding them into a single byte-stream.  AEAD also supports
having no IVs by providing IV generators (see seqiv, eseqiv, etc.).

Cheers,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt