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

Stefan Berger
2021-03-16T21:08:56Z

From: Saulo Alessandre <saulo.alessandre@tse.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@tse.jus.br>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.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