From patchwork Tue Mar 12 18:36:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 780384 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 05D53142624; Tue, 12 Mar 2024 18:37:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710268678; cv=none; b=sT8ylF3PznoqtDE1R98BBDrEde1SEe/THw8s6F3dKX34beF2hlkML4Vxc6aXye4Ew/dDsj4iP06QbeLJGZ4FC/LFjdYx0bd6MaICfNMVtVgrqbd9YmJrVLhh2tMKvyddbJ6/UexTfaaqIYBJj3lJGbvVgv7NbB+zgeSs7TV6roA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710268678; c=relaxed/simple; bh=6DMJwLUAFa+nU192MvL46uyT+1JLOZ359xLFzPdSPcg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Jzaz2bU/GTKXXcUuJDbqMx0OyfN9xjDhmYdQnnC9xdkyvcX02jDpzXQeL1jX89pCyG7Nsx6NvhfuEuPyZh/w0Gup4A7w7YgslE496PfJUr/xexUcTUyumcx8nTOImTmQzEaIWtstplYqj8Fy497lnaFmab0wd5jJ3cu1Ve9h0ac= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.vnet.ibm.com; spf=none smtp.mailfrom=linux.vnet.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=DKsHsAgS; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.vnet.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.vnet.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="DKsHsAgS" Received: from pps.filterd (m0356516.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 42CILl5B008704; Tue, 12 Mar 2024 18:36:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=fMYR0zeTv3ytMQzCBO/Lm7KzJo0pZU8LtnGFoj622xw=; b=DKsHsAgSw33n5zh1ZeKXiP3TrZhtSmTe9kQe5vwMqq7/kLu3CkyyELddkVhZqnGQ3ZR2 0dxelIlOibL3bf0c89D1EtaQE8daYFqsJILMxh6wDi93QicLccY5L1aCKQ0t65oLbsNm w9YRan7emSJwzs2N4jkRlXR10BMXOG8NK698zOjYtTpdRttdbwdoXmBHUVT3b8A4fCsK xbXNdS212c6OVvxgj/G1z9q35YjDn+Nrz31mW/eEyH+KV2sdJC9nD3a8CiYPwy1TG/GA QiTlUeDAVHBb0NEqmHlL+cMVOk74R2WB3TTugESa2LXQS5dKsbAD4I5NBBWTPNsnvxxB zw== Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3wtuhvgtrw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Mar 2024 18:36:34 +0000 Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 42CG7rBw020601; Tue, 12 Mar 2024 18:36:33 GMT Received: from smtprelay02.dal12v.mail.ibm.com ([172.16.1.4]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3ws3km0rea-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Mar 2024 18:36:33 +0000 Received: from smtpav06.wdc07v.mail.ibm.com (smtpav06.wdc07v.mail.ibm.com [10.39.53.233]) by smtprelay02.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 42CIaUto21889606 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Mar 2024 18:36:33 GMT Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 944FD5803F; Tue, 12 Mar 2024 18:36:30 +0000 (GMT) Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9CE8558077; Tue, 12 Mar 2024 18:36:29 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by smtpav06.wdc07v.mail.ibm.com (Postfix) with ESMTP; Tue, 12 Mar 2024 18:36:29 +0000 (GMT) From: Stefan Berger 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 Subject: [PATCH v6 09/13] crypto: ecdsa - Replace ndigits with nbits where precision is needed Date: Tue, 12 Mar 2024 14:36:14 -0400 Message-ID: <20240312183618.1211745-10-stefanb@linux.vnet.ibm.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240312183618.1211745-1-stefanb@linux.vnet.ibm.com> References: <20240312183618.1211745-1-stefanb@linux.vnet.ibm.com> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: JSRKGF3EarVD9AVYgMhDhxRpjlT9k02x X-Proofpoint-ORIG-GUID: JSRKGF3EarVD9AVYgMhDhxRpjlT9k02x X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-12_11,2024-03-12_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 phishscore=0 mlxscore=0 malwarescore=0 suspectscore=0 adultscore=0 spamscore=0 impostorscore=0 clxscore=1015 bulkscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2403120139 From: Stefan Berger 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 Tested-by: Lukas Wunner --- 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)