Re: [PATCH v2 12/15] crypto: arm64/sm4 - add CE implementation for ESSIV mode

[Tianjia Zhang]

Hi Eric,

On 10/20/22 11:58 AM, Eric Biggers wrote:
> On Tue, Oct 18, 2022 at 03:10:03PM +0800, Tianjia Zhang wrote:
> > This patch is a CE-optimized assembly implementation for ESSIV mode.
> > The assembly part is realized by reusing the CBC mode.
> >
> > Signed-off-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
>
> Is there still a use case for CBC-ESSIV mode these days, now that everyone is
> using XTS instead?
>
> - Eric

The mainstream is already using XTS, but CBC-ESSIV is still an optional
backup algorithm, especially in block crypto and fscrypto, I'm currently
working on supporting the SM4 algorithm for these subsystems.

Cheers,
Tianjia