From patchwork Tue Mar 12 18:36:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 780387 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 78E401420A8; Tue, 12 Mar 2024 18:37:41 +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=1710268662; cv=none; b=RjxZdJD06PCiH2Dz84FGd0tKmA+HNXkrQmbN3b+zmLusm8Eq6qxWuqDuLvErE3T968fdyUouKzGZnA2odnYIHw456Tzfi7GqiOcNsvrluDCXNkrmvmIHMveTz8XKpjjvSQ72WEy6H7J2XbBgSgMMf8vQRMjqYGh6ReVbaMdsrlE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710268662; c=relaxed/simple; bh=+TlkBJWK1d0rnIkU9s7Ns71m0Hsm4TegeQXiufe1giQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RVRQSYeMoKnFzn057Wg4UmAdz7NTIQbfKq1NteyCs3e/SnzvQ4ArlJ6A4PKJ8Q+4ziTxeVASFIhvvxmE/c57bH89cVhPgEQjkReBrdfpVGHx/gE+lX2swnNfe/CXsNF0oUGb1C67yQrpIoXQJzZrZH6z2Ck7AW9eI3Jj+/lhVqg= 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=Dme51LZV; 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="Dme51LZV" Received: from pps.filterd (m0353723.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 42CINI2i013163; Tue, 12 Mar 2024 18:36:32 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=UAOUKXQi1QZjRd5zslhJQWq7E/pEYdaCTjorbiKzbIg=; b=Dme51LZVGvs4p5rkxQv4u/f4vbF6TqFWp64iiIRf6B3oe2eW/t0k2O+OlGMZz8L/KCnJ 4kjzL0nyNvS+jKUi7Wfhsr/W8QOnqA9iEMGEqSIwcB/2rXyagtChvBbjSbxF20Xt2eVk MrsxfyC6n6Py5/56Ctju/L2PoMTUyQ4PDc/0LMASgMV7MPp+otiGstDDrZ6k1EoQX3uW kGTCewQBk3DCquaWQQoonjMLhT+Q27pZ5KRT3YjnsDNGi6B22O/TM3ANS/xy+nV7RBCf wN6EeFK8vb4eIxVlieO/8VZfCkUybU3mVSyBNQQo3d9tTIwvxn00d5RIWTCPClflJ1nS QA== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3wtv9d86kt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Mar 2024 18:36:31 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 42CGNFJL013580; Tue, 12 Mar 2024 18:36:31 GMT Received: from smtprelay06.wdc07v.mail.ibm.com ([172.16.1.73]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3ws4ak8gu1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Mar 2024 18:36:31 +0000 Received: from smtpav06.wdc07v.mail.ibm.com (smtpav06.wdc07v.mail.ibm.com [10.39.53.233]) by smtprelay06.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 42CIaSiu38928732 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Mar 2024 18:36:30 GMT Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 60BB95803F; Tue, 12 Mar 2024 18:36:28 +0000 (GMT) Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 69BDC58080; Tue, 12 Mar 2024 18:36:27 +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 18:36:27 +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 07/13] crypto: ecc - Add special case for NIST P521 in ecc_point_mult Date: Tue, 12 Mar 2024 14:36:12 -0400 Message-ID: <20240312183618.1211745-8-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: vXiy63cw6xiBmw7ZQH_QzuLQ17gkVouc X-Proofpoint-ORIG-GUID: vXiy63cw6xiBmw7ZQH_QzuLQ17gkVouc 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 priorityscore=1501 impostorscore=0 clxscore=1015 spamscore=0 mlxlogscore=999 bulkscore=0 lowpriorityscore=0 mlxscore=0 phishscore=0 malwarescore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2403120139 From: Stefan Berger In ecc_point_mult use the number of bits of the NIST P521 curve + 2. The change is required specifically for NIST P521 to pass mathematical tests on the public key. Signed-off-by: Stefan Berger Tested-by: Lukas Wunner Reviewed-by: Jarkko Sakkinen --- crypto/ecc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/crypto/ecc.c b/crypto/ecc.c index 99d41887c005..ead40b5ebb46 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -1320,7 +1320,10 @@ static void ecc_point_mult(struct ecc_point *result, carry = vli_add(sk[0], scalar, curve->n, ndigits); vli_add(sk[1], sk[0], curve->n, ndigits); scalar = sk[!carry]; - num_bits = sizeof(u64) * ndigits * 8 + 1; + if (curve->nbits == 521) /* NIST P521 */ + num_bits = curve->nbits + 2; + else + num_bits = sizeof(u64) * ndigits * 8 + 1; vli_set(rx[1], point->x, ndigits); vli_set(ry[1], point->y, ndigits);