linux-kernel - Re: [PATCH v3 1/3] crypto: streebog

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Date:   Mon, 5 Nov 2018 17:36:31 +0300
From:   Vitaly Chikunov <vt@...linux.org>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        linux-crypto@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/3] crypto: streebog - add Streebog hash function

Ard,

I will address your suggestions in v4. And below is my comments for a
few of them.

On Mon, Nov 05, 2018 at 02:22:21PM +0100, Ard Biesheuvel wrote:
> > +static const struct streebog_uint512 buffer512 = { {
> > +       cpu_to_le64(0x200ULL),
> 
> Can we keep the memory representation in native endianness, and only
> swab the in/output [where needed]?

Yes. This will slightly affect performance on big-endian architectures,
but, probably this is not a concern.

> Also, did you test this code on a big-endian system?

Yes, on s390x on qemu.

> > +               .cra_name        =      "sb256",
> 
> Please use the full name 'streebog256' (and 512 below)

First, I thought of shortening name like Whirlpool do with wp256, but
now I rethought this and agree.

Thanks!