Re: [RFC PATCH] arm64: add support for AES in CCM mode using Crypto Extensions

On 25 February 2014 10:08, Herbert Xu [off-list ref] wrote:

On Tue, Feb 25, 2014 at 08:21:22AM +0100, Ard Biesheuvel wrote:

quoted

For the authenticate-only data, this is manageable as you are only
dealing with input, but when dealing with both in- and output, as in
the core of CCM, it becomes very tedious.
So instead, I have opted for an inner blkcipher instance which takes
care of all of that. Could you suggest another approach that if
preferable?

I don't think the walk helper actually needs the tfm apart from
getting a couple of parameters out of it, so perhaps we can just
change the helper to not depend on a tfm.

That seems like a less hacky approach.

I'll cook something up and put it on the list.

Cheers,
Ard.