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From: Stefan Berger <stefanb@linux.ibm.com>
To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org,
        herbert@gondor.apana.org.au, davem@davemloft.net
Cc: linux-kernel@vger.kernel.org, saulo.alessandre@tse.jus.br, lukas@wunner.de,
        Stefan Berger <stefanb@linux.ibm.com>
Subject: [PATCH v4 08/12] crypto: ecdsa - Replace ndigits with nbits where precision is needed
Date: Thu, 29 Feb 2024 21:20:03 -0500
Message-ID: <20240301022007.344948-9-stefanb@linux.ibm.com>
In-Reply-To: <20240301022007.344948-1-stefanb@linux.ibm.com>
References: <20240301022007.344948-1-stefanb@linux.ibm.com>
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Replace the usage of ndigits with nbits where more precise space
calculations are needed, such as in ecdsa_max_size where the length of a
coordinate is determined.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
 crypto/ecdsa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/ecdsa.c b/crypto/ecdsa.c
index 1814f009f971..4daefb40c37a 100644
--- a/crypto/ecdsa.c
+++ b/crypto/ecdsa.c
@@ -266,7 +266,7 @@ static unsigned int ecdsa_max_size(struct crypto_akcipher *tfm)
 {
 	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
 
-	return ctx->pub_key.ndigits << ECC_DIGITS_TO_BYTES_SHIFT;
+	return DIV_ROUND_UP(ctx->curve->nbits, 8);
 }
 
 static int ecdsa_nist_p384_init_tfm(struct crypto_akcipher *tfm)
-- 
2.43.0