linux-kernel - [PATCH v12 03/10] crypto: Add NIST P384 curve parameters

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Message-Id: <20210316210740.1592994-4-stefanb@linux.ibm.com>
Date:   Tue, 16 Mar 2021 17:07:33 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        davem@...emloft.net, herbert@...dor.apana.org.au,
        dhowells@...hat.com, zohar@...ux.ibm.com, jarkko@...nel.org
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, patrick@...terwijk.org,
        Saulo Alessandre <saulo.alessandre@....jus.br>,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v12 03/10] crypto: Add NIST P384 curve parameters

From: Saulo Alessandre <saulo.alessandre@....jus.br>

Add the parameters for the NIST P384 curve and define a new curve ID
for it. Make the curve available in ecc_get_curve.

Summary of changes:

* crypto/ecc_curve_defs.h
  - add nist_p384 params

* include/crypto/ecdh.h
  - add ECC_CURVE_NIST_P384

* crypto/ecc.c
  - change ecc_get_curve to accept nist_p384

Signed-off-by: Saulo Alessandre <saulo.alessandre@....jus.br>
Tested-by: Stefan Berger <stefanb@...ux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko@...nel.org>
---
 crypto/ecc.c            |  2 ++
 crypto/ecc_curve_defs.h | 32 ++++++++++++++++++++++++++++++++
 include/crypto/ecdh.h   |  1 +
 3 files changed, 35 insertions(+)

diff --git a/crypto/ecc.c b/crypto/ecc.c
index 25e79fd70566..f6cef5a7942d 100644
--- a/crypto/ecc.c
+++ b/crypto/ecc.c
@@ -50,6 +50,8 @@ const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
 		return fips_enabled ? NULL : &nist_p192;
 	case ECC_CURVE_NIST_P256:
 		return &nist_p256;
+	case ECC_CURVE_NIST_P384:
+		return &nist_p384;
 	default:
 		return NULL;
 	}
diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h
index 69be6c7d228f..b327732f6ef5 100644
--- a/crypto/ecc_curve_defs.h
+++ b/crypto/ecc_curve_defs.h
@@ -54,4 +54,36 @@ static struct ecc_curve nist_p256 = {
 	.b = nist_p256_b
 };
 
+/* NIST P-384 */
+static u64 nist_p384_g_x[] = { 0x3A545E3872760AB7ull, 0x5502F25DBF55296Cull,
+				0x59F741E082542A38ull, 0x6E1D3B628BA79B98ull,
+				0x8Eb1C71EF320AD74ull, 0xAA87CA22BE8B0537ull };
+static u64 nist_p384_g_y[] = { 0x7A431D7C90EA0E5Full, 0x0A60B1CE1D7E819Dull,
+				0xE9DA3113B5F0B8C0ull, 0xF8F41DBD289A147Cull,
+				0x5D9E98BF9292DC29ull, 0x3617DE4A96262C6Full };
+static u64 nist_p384_p[] = { 0x00000000FFFFFFFFull, 0xFFFFFFFF00000000ull,
+				0xFFFFFFFFFFFFFFFEull, 0xFFFFFFFFFFFFFFFFull,
+				0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p384_n[] = { 0xECEC196ACCC52973ull, 0x581A0DB248B0A77Aull,
+				0xC7634D81F4372DDFull, 0xFFFFFFFFFFFFFFFFull,
+				0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p384_a[] = { 0x00000000FFFFFFFCull, 0xFFFFFFFF00000000ull,
+				0xFFFFFFFFFFFFFFFEull, 0xFFFFFFFFFFFFFFFFull,
+				0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p384_b[] = { 0x2a85c8edd3ec2aefull, 0xc656398d8a2ed19dull,
+				0x0314088f5013875aull, 0x181d9c6efe814112ull,
+				0x988e056be3f82d19ull, 0xb3312fa7e23ee7e4ull };
+static struct ecc_curve nist_p384 = {
+	.name = "nist_384",
+	.g = {
+		.x = nist_p384_g_x,
+		.y = nist_p384_g_y,
+		.ndigits = 6,
+	},
+	.p = nist_p384_p,
+	.n = nist_p384_n,
+	.a = nist_p384_a,
+	.b = nist_p384_b
+};
+
 #endif
diff --git a/include/crypto/ecdh.h b/include/crypto/ecdh.h
index a5b805b5526d..e4ba1de961e4 100644
--- a/include/crypto/ecdh.h
+++ b/include/crypto/ecdh.h
@@ -25,6 +25,7 @@
 /* Curves IDs */
 #define ECC_CURVE_NIST_P192	0x0001
 #define ECC_CURVE_NIST_P256	0x0002
+#define ECC_CURVE_NIST_P384	0x0003
 
 /**
  * struct ecdh - define an ECDH private key
-- 
2.29.2