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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,
        bbhushan2@marvell.com, jarkko@kernel.org,
        Stefan Berger <stefanb@linux.ibm.com>
Subject: [PATCH v7 09/13] crypto: ecdsa - Replace ndigits with nbits where precision is needed
Date: Wed, 20 Mar 2024 07:47:21 -0400
Message-ID: <20240320114725.1644921-10-stefanb@linux.ibm.com>
In-Reply-To: <20240320114725.1644921-1-stefanb@linux.ibm.com>
References: <20240320114725.1644921-1-stefanb@linux.ibm.com>
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Replace the usage of ndigits with nbits where 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>
Tested-by: Lukas Wunner <lukas@wunner.de>
---
 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