linux-kernel - Re: [RFC PATCH v2] crypto: Add IV generation algorithms

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Message-ID: <CAHv-k_8RAvNt5RC1uJg=he-8dOSmH=f5X83i3h6WYJ47FjL+7g@mail.gmail.com>
Date:   Mon, 2 Jan 2017 12:35:03 +0530
From:   Binoy Jayan <binoy.jayan@...aro.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     Milan Broz <gmazyland@...il.com>, Oded <oded.golombek@....com>,
        Ofir <Ofir.Drang@....com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Shaohua Li <shli@...nel.org>, linux-raid@...r.kernel.org,
        Rajendra <rnayak@...eaurora.org>
Subject: Re: [RFC PATCH v2] crypto: Add IV generation algorithms

On 2 January 2017 at 12:23, Herbert Xu <herbert@...dor.apana.org.au> wrote:
> On Mon, Jan 02, 2017 at 12:16:45PM +0530, Binoy Jayan wrote:
>>
>> Even if ciphers are allocated this way, all the encryption requests
>> for cbc should still go through IV generators? So that should mean,
>> create one instance of IV generator using 'crypto_alloc_skcipher'
>> and create tfms_count instances of the generator depending on the
>> number of keys.
>
> Right.  The actual number of underlying tfms that do the work
> won't change compared to the status quo.  We're just structuring
> it such that if the overall scheme is supported by the hardware
> then we can feed more than one sector at a time to it.

Thank you Herbert.