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Fri, 23 Feb 2024 20:42:09 +0000 Received: from smtpav02.wdc07v.mail.ibm.com (smtpav02.wdc07v.mail.ibm.com [10.39.53.229]) by smtprelay05.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 41NKg65J22545048 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 23 Feb 2024 20:42:09 GMT Received: from smtpav02.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9C54758059; Fri, 23 Feb 2024 20:42:06 +0000 (GMT) Received: from smtpav02.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DAA7A58058; Fri, 23 Feb 2024 20:42:05 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by smtpav02.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 23 Feb 2024 20:42:05 +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, Stefan Berger Subject: [PATCH v3 05/10] crypto: ecc - Add nbits field to ecc_curve structure Date: Fri, 23 Feb 2024 15:41:44 -0500 Message-ID: <20240223204149.4055630-6-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240223204149.4055630-1-stefanb@linux.ibm.com> References: <20240223204149.4055630-1-stefanb@linux.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: QVYOUD45-EKmdIUN3ldLtCStONgxabdI X-Proofpoint-ORIG-GUID: QVYOUD45-EKmdIUN3ldLtCStONgxabdI 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=2024-02-23_06,2024-02-23_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 impostorscore=0 spamscore=0 phishscore=0 mlxlogscore=999 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402230152 Add the number of bits a curve has to the ecc_curve definition. This field only needs to be set for curves that don't fill up all bytes in their digits, such as NIST P521 which has only 9 bits in the most significant digit. This field will be used to determine the number of bytes a curve requires for its key coordinates for example. Signed-off-by: Stefan Berger --- include/crypto/ecc_curve.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/crypto/ecc_curve.h b/include/crypto/ecc_curve.h index 70964781eb68..337a44956926 100644 --- a/include/crypto/ecc_curve.h +++ b/include/crypto/ecc_curve.h @@ -23,6 +23,8 @@ struct ecc_point { * struct ecc_curve - definition of elliptic curve * * @name: Short name of the curve. + * @nbits: Curves that do not use all bits in their ndigits must specify + * their number of bits here, otherwise can leave at 0. * @g: Generator point of the curve. * @p: Prime number, if Barrett's reduction is used for this curve * pre-calculated value 'mu' is appended to the @p after ndigits. @@ -34,6 +36,7 @@ struct ecc_point { */ struct ecc_curve { char *name; + unsigned int nbits; struct ecc_point g; u64 *p; u64 *n;