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From:   Ard Biesheuvel <ardb@kernel.org>
Date:   Sat, 11 Mar 2023 09:42:06 +0100
Message-ID: <CAMj1kXEr8W1NP0Xcny7ed1xb7ofb7Y6R57TPNe6=jAASDzHzKw@mail.gmail.com>
Subject: Re: [PATCH v2] crypto: lib - implement library version of AES in CFB mode
To:     Herbert Xu <herbert@gondor.apana.org.au>
Cc:     linux-crypto@vger.kernel.org, ebiggers@kernel.org,
        James Bottomley <James.Bottomley@hansenpartnership.com>
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On Sat, 11 Mar 2023 at 09:17, Herbert Xu <herbert@gondor.apana.org.au> wrote:
>
> On Sat, Mar 11, 2023 at 09:15:42AM +0100, Ard Biesheuvel wrote:
> >
> > Doesn't that depend on the implementation? It might have a >0 size
> > request context size, no? Or do we just allocate that on the stack?
>
> Do you have a concrete example of something that needs this?
> Is this a temporary scratch buffer used only during computation?
>

Every call to crypto_skcipher_set_reqsize(), no?