From: Lukas Wunner <lukas@wunner.de>
To: Stefan Berger <stefanb@linux.ibm.com>
Cc: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org,
herbert@gondor.apana.org.au, davem@davemloft.net,
linux-kernel@vger.kernel.org, saulo.alessandre@tse.jus.br
Subject: Re: [PATCH v3 01/10] crypto: ecdsa - Convert byte arrays with key coordinates to digits
Date: Thu, 29 Feb 2024 17:48:10 +0100 [thread overview]
Message-ID: <20240229164810.GA7144@wunner.de> (raw)
In-Reply-To: <aabeec7b-618c-4d15-b033-4162b6e54f6a@linux.ibm.com>
On Thu, Feb 29, 2024 at 09:57:30AM -0500, Stefan Berger wrote:
> static inline void ecc_digits_from_bytes(const u8 *in, unsigned int nbytes,
> u64 *out, unsigned int ndigits)
> {
> unsigned int o = nbytes & 7;
> u64 msd = 0;
> size_t i;
>
> if (o == 0) {
> ecc_swap_digits(in, out, ndigits);
> } else {
> for (i = 0; i < o; i++)
> msd = (msd << 8) | in[i];
> out[ndigits - 1] = msd;
> ecc_swap_digits(&in[o], out, ndigits - 1);
> }
> }
Might be beneficial to add a code comment explaining the else-branch
is for curves with key length not a multiple of 64 bits (such as NIST P521).
Otherwise LGTM, thanks!
Lukas
next prev parent reply other threads:[~2024-02-29 16:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-23 20:41 [PATCH v3 00/10] Add support for NIST P521 to ecdsa Stefan Berger
2024-02-23 20:41 ` [PATCH v3 01/10] crypto: ecdsa - Convert byte arrays with key coordinates to digits Stefan Berger
2024-02-29 9:11 ` Lukas Wunner
2024-02-29 14:57 ` Stefan Berger
2024-02-29 16:48 ` Lukas Wunner [this message]
2024-02-29 17:20 ` Stefan Berger
2024-03-01 20:26 ` Jarkko Sakkinen
2024-03-01 20:48 ` Stefan Berger
2024-03-01 20:51 ` Jarkko Sakkinen
2024-03-02 14:00 ` Lukas Wunner
2024-03-02 21:19 ` Stefan Berger
2024-03-02 21:36 ` Lukas Wunner
2024-03-02 21:55 ` Jarkko Sakkinen
2024-02-23 20:41 ` [PATCH v3 02/10] crypto: ecdsa - Adjust tests on length of key parameters Stefan Berger
2024-02-29 9:16 ` Lukas Wunner
2024-02-29 20:28 ` Stefan Berger
2024-02-23 20:41 ` [PATCH v3 03/10] crypto: ecdsa - Extend res.x mod n calculation for NIST P521 Stefan Berger
2024-02-23 20:41 ` [PATCH v3 04/10] crypto: ecc - Implement vli_mmod_fast_521 for NIST p521 Stefan Berger
2024-02-23 20:41 ` [PATCH v3 05/10] crypto: ecc - Add nbits field to ecc_curve structure Stefan Berger
2024-02-23 20:41 ` [PATCH v3 06/10] crypte: ecc - Implement ecc_curve_get_nbits to get number of bits Stefan Berger
2024-02-27 20:15 ` Lukas Wunner
2024-02-29 20:29 ` Stefan Berger
2024-02-23 20:41 ` [PATCH v3 07/10] crypto: ecc - Use ecc_get_curve_nbits to get number of bits for NIST P521 Stefan Berger
2024-02-23 20:41 ` [PATCH v3 08/10] crypto: ecc - Add NIST P521 curve parameters Stefan Berger
2024-02-23 20:41 ` [PATCH v3 09/10] crypto: ecdsa - Register NIST P521 and extend test suite Stefan Berger
2024-02-23 20:41 ` [PATCH v3 10/10] x509: Add OID for NIST P521 and extend parser for it Stefan Berger
2024-02-29 9:34 ` [PATCH v3 00/10] Add support for NIST P521 to ecdsa Lukas Wunner
2024-02-29 18:45 ` Stefan Berger
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