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Message-Id: <CZIPKTL42F1Z.2U4Q28IIQ159K@suppilovahvero>
Date: Fri, 01 Mar 2024 22:50:30 +0200
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Stefan Berger" <stefanb@...ux.ibm.com>, <keyrings@...r.kernel.org>,
<linux-crypto@...r.kernel.org>, <herbert@...dor.apana.org.au>,
<davem@...emloft.net>
Cc: <linux-kernel@...r.kernel.org>, <saulo.alessandre@....jus.br>,
<lukas@...ner.de>
Subject: Re: [PATCH v4 09/12] crypto: ecdsa - Rename keylen to bufsize where
necessary
On Fri Mar 1, 2024 at 10:47 PM EET, Stefan Berger wrote:
>
>
> On 3/1/24 15:41, Jarkko Sakkinen wrote:
> > On Fri Mar 1, 2024 at 4:20 AM EET, Stefan Berger wrote:
> >> In some cases the name keylen does not reflect the purpose of the variable
> >> anymore once NIST P521 is used but it is the size of the buffer. There-
> >> for, rename keylen to bufsize where appropriate.
> >>
> >> Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
> >> ---
> >> crypto/ecdsa.c | 12 ++++++------
> >> 1 file changed, 6 insertions(+), 6 deletions(-)
> >>
> >> diff --git a/crypto/ecdsa.c b/crypto/ecdsa.c
> >> index 4daefb40c37a..4e847b59622a 100644
> >> --- a/crypto/ecdsa.c
> >> +++ b/crypto/ecdsa.c
> >> @@ -35,8 +35,8 @@ struct ecdsa_signature_ctx {
> >> static int ecdsa_get_signature_rs(u64 *dest, size_t hdrlen, unsigned char tag,
> >> const void *value, size_t vlen, unsigned int ndigits)
> >> {
> >> - size_t keylen = ndigits * sizeof(u64);
> >> - ssize_t diff = vlen - keylen;
> >> + size_t bufsize = ndigits * sizeof(u64);
> >
> > why not just "* 8"? using sizeof here makes this function only unreadable.
>
> 'unreadable' is a 'strong' word ...
so what is the gain when writing sizeof(u64)?
BR, Jarkko
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