Received: by 2002:ab2:3b09:0:b0:1ed:14ea:9113 with SMTP id b9csp26042lqc; Thu, 29 Feb 2024 09:20:29 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWkJyQml/gMBJz3piFfZy40MtM+auru4au+IXbfFR+eg8iHZD9akerJsCNwPtvTMK3x0LDtjRherxwxYa1J65pQC4fkrwm1V7zCAqCu0g== X-Google-Smtp-Source: AGHT+IHvA/Gl9s5ubd85Rj5HXmNCpaYekmWHUJ0DQLLiob79mYdOycSVcVGz3Q5nM5nU6wFxMGfy X-Received: by 2002:a05:6402:33c9:b0:564:4221:9ed6 with SMTP id a9-20020a05640233c900b0056442219ed6mr1846251edc.38.1709227229577; Thu, 29 Feb 2024 09:20:29 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709227229; cv=pass; d=google.com; s=arc-20160816; b=tm9nT4qtPxVu47DwinmdWHr5EG334GBAzIudnnLob2mviDt0UJOVfwweVRkiFNApuo lT+Z74LozueLXK17oJ+4u8uTcGOSwwzw8J6X2ImTwHSYkKJdVt0V/AyCdf7QT4Xu+kZ4 AUoxjKEDIpZP39sKoAIRYC9X/7mtxsjwyIQyyHdUWGHiKiugSXggIYM+bY1oP0acy+2N JDpU1ejrEivcKLq4YnniadnDq0TL/sVQZ0bpYMf5AjqoL+x5zScVCmmzZCz0wHsJHYSu SCP4rlMJQEObNXh0zDrsfdIEY+g5YVtPTKSnsu91SXam6PedFXVCNUM1Icg1zzKcfCtb yvFg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:date:message-id:dkim-signature; bh=IV5mhgJj7xbmsvQquxXg5BKgRYaJLGVppM18LS4QUV4=; fh=oaC6g1rvngpUy3NBPUH3HwPaOzR9292cM7qLBeN9XRU=; b=CdrTbhJWhB/UAMsL7Gr/eg0OEilpstsBTfaK4PM4o00/cJbYTXZ9zQj4HfZzuDlpfW V1v024V+BnyKEnQBTqGGnSkjmgnXF4vSgQHYJqRRt06rkH56NYgPbdR4v/R+0YK2wAjb rNp9Aea57xfXgiFSf2c9p4fjKPvcvqEWqQWVmBYB7r+IsBlhf0SzSfb05zYd3o+tNITy JpJwar+INFg7mDseUJoct7YfOXF/TtgHtrpBP/MQ2XAF9DgsXMsu+QDh5nxJBf3lO7ff mtjbrKhb4+R3j66Dt9tGLrSaF4GDcYG0mZxeQIqqOFi1IFNoS4aB/t82IpkqpejAmQXI 51Xw==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@ibm.com header.s=pp1 header.b=CUnI60bg; arc=pass (i=1 spf=pass spfdomain=linux.ibm.com dkim=pass dkdomain=ibm.com dmarc=pass fromdomain=linux.ibm.com); spf=pass (google.com: domain of linux-crypto+bounces-2401-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-crypto+bounces-2401-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=NONE dis=NONE) header.from=ibm.com Return-Path: Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. [147.75.80.249]) by mx.google.com with ESMTPS id z4-20020a05640235c400b00566a87b67e3si552591edc.66.2024.02.29.09.20.29 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Feb 2024 09:20:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-crypto+bounces-2401-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249; Authentication-Results: mx.google.com; dkim=pass header.i=@ibm.com header.s=pp1 header.b=CUnI60bg; arc=pass (i=1 spf=pass spfdomain=linux.ibm.com dkim=pass dkdomain=ibm.com dmarc=pass fromdomain=linux.ibm.com); spf=pass (google.com: domain of linux-crypto+bounces-2401-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-crypto+bounces-2401-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=NONE dis=NONE) header.from=ibm.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 23D7F1F22713 for ; Thu, 29 Feb 2024 17:20:29 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 33CBC6CBF2; Thu, 29 Feb 2024 17:20:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="CUnI60bg" X-Original-To: linux-crypto@vger.kernel.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (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 40B5416065F; Thu, 29 Feb 2024 17:20:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709227223; cv=none; b=j7cTQUsIeQ3MdPB3TfEdBzjWEY+jU5ddivbFedRwPr9X9fh+3ECFoX3ixRwUmAnfALQCHs8qWnbGItsIhFbiA4uKYdK7EJgtujDIWVzmtHLib0EZrteIjW7VEyL9Zb4oshAxcSnQzbEK5pGihsC6r3lnOVoEorAc63qH0iLJkDA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709227223; c=relaxed/simple; bh=J47JN2zuNOB1XU/wuoC0gP1HXwEli68V7Qws6Hwuei4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=DNMfMPG9+EUI7ecjT3BpCHYGE65fXWT6/VpqRalv6gri7TSlwLdY/faMlm+pdQEGxmp94AkK9j0aTzMkI08urLvAncpVgrkwNdlmCY/4pPBC0vH/5ySX+J83oLV0ebPW2zFRJQqzU7rDI2PmyvV+Sd+Fok0I3fGagQUkVCZ2tzQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=CUnI60bg; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 41TH7FeS008358; Thu, 29 Feb 2024 17:20:15 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=IV5mhgJj7xbmsvQquxXg5BKgRYaJLGVppM18LS4QUV4=; b=CUnI60bgJJmq7b3KSui100LllhNOKjH3+z7o5BffpDHGukfpsGKGodc6T1Qnn2/+oJ9S 2RAeSKSZdA3Ef6JnVDwxu6tOW6cOJen9W4wGytPeMrPng2B2BhlxzupTNBDdiQuVenhn DBBsUz+z715spEO6LcwVWRQW3rAVN6IxP7WcD8+kcpdQfTLdJvFp86cALfpEzkSX8Vfy Fev4x/OgO4ssIJzLw7aRCWO5oRwneotrqw0MWRjLmYNGgEg1KOx6VMXLnNAuogpO/vI5 xMcQg0sZwsg5Nr04iDwfNL6mo4daglWg6CJ26rzVJoj3dNnlZetTmAtG37YNhoVhUfiG EA== 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 3wjx1t8exg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Feb 2024 17:20:14 +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 41TFZ92V008211; Thu, 29 Feb 2024 17:20:13 GMT Received: from smtprelay05.wdc07v.mail.ibm.com ([172.16.1.72]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3wfv9mps6g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Feb 2024 17:20:13 +0000 Received: from smtpav01.wdc07v.mail.ibm.com (smtpav01.wdc07v.mail.ibm.com [10.39.53.228]) by smtprelay05.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 41THKBLd21234200 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 29 Feb 2024 17:20:13 GMT Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8924058071; Thu, 29 Feb 2024 17:20:09 +0000 (GMT) Received: from smtpav01.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D20A15806F; Thu, 29 Feb 2024 17:20:08 +0000 (GMT) Received: from [9.47.158.152] (unknown [9.47.158.152]) by smtpav01.wdc07v.mail.ibm.com (Postfix) with ESMTP; Thu, 29 Feb 2024 17:20:08 +0000 (GMT) Message-ID: <88b7574d-c9eb-47c2-928b-e9e19ba7835d@linux.ibm.com> Date: Thu, 29 Feb 2024 12:20:08 -0500 Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 01/10] crypto: ecdsa - Convert byte arrays with key coordinates to digits Content-Language: en-US To: Lukas Wunner 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 References: <20240223204149.4055630-1-stefanb@linux.ibm.com> <20240223204149.4055630-2-stefanb@linux.ibm.com> <20240229091105.GA29363@wunner.de> <20240229164810.GA7144@wunner.de> From: Stefan Berger In-Reply-To: <20240229164810.GA7144@wunner.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: lOMZ-E5THFawRCYSPAOOJE_ZezzTMpeI X-Proofpoint-ORIG-GUID: lOMZ-E5THFawRCYSPAOOJE_ZezzTMpeI 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=2024-02-29_03,2024-02-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 adultscore=0 mlxlogscore=734 spamscore=0 priorityscore=1501 bulkscore=0 phishscore=0 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402290134 On 2/29/24 11:48, Lukas Wunner wrote: > 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). Will do. I am also using this here now since it's safer: ecc_swap_digits(&in[o], out, (nbytes - o) >> 3); Stefan > > Otherwise LGTM, thanks! > > Lukas