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Thu, 15 Feb 2024 23:14:32 +0000 Received: from smtpav04.wdc07v.mail.ibm.com (smtpav04.wdc07v.mail.ibm.com [10.39.53.231]) by smtprelay06.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 41FNETLn6357966 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Feb 2024 23:14:31 GMT Received: from smtpav04.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7FBB158061; Thu, 15 Feb 2024 23:14:29 +0000 (GMT) Received: from smtpav04.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CF3E158050; Thu, 15 Feb 2024 23:14:28 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by smtpav04.wdc07v.mail.ibm.com (Postfix) with ESMTP; Thu, 15 Feb 2024 23:14:28 +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 v2 11/14] crypto: Add nbits field to ecc_curve structure Date: Thu, 15 Feb 2024 18:14:10 -0500 Message-ID: <20240215231414.3857320-12-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240215231414.3857320-1-stefanb@linux.ibm.com> References: <20240215231414.3857320-1-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-ORIG-GUID: CsLwuN1bCkc0LPLu-6Og_En6AG20EVR2 X-Proofpoint-GUID: CsLwuN1bCkc0LPLu-6Og_En6AG20EVR2 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=2024-02-15_22,2024-02-14_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 mlxlogscore=945 impostorscore=0 mlxscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 lowpriorityscore=0 phishscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402150181 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 --- crypto/ecc_curve_defs.h | 1 + include/crypto/ecc_curve.h | 3 +++ 2 files changed, 4 insertions(+) diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h index 93a47a5d460a..09a221657c31 100644 --- a/crypto/ecc_curve_defs.h +++ b/crypto/ecc_curve_defs.h @@ -119,6 +119,7 @@ static u64 nist_p521_b[] = { 0xef451fd46b503f00ull, 0x3573df883d2c34f1ull, 0x051ull }; static struct ecc_curve nist_p521 = { .name = "nist_521", + .nbits = 521, .g = { .x = nist_p521_g_x, .y = nist_p521_g_y, 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;