On Tue Mar 12, 2024 at 8:36 PM EET, Stefan Berger wrote:
> From: Stefan Berger <stefanb@xxxxxxxxxxxxx>
>
> Add the parameters for the NIST P521 curve and define a new curve ID
> for it. Make the curve available in ecc_get_curve.
This is rare example of "complete story" in this series despite being
short, so no complains :-)
>
> Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
> Tested-by: Lukas Wunner <lukas@xxxxxxxxx>
> ---
> crypto/ecc.c | 2 ++
> crypto/ecc_curve_defs.h | 45 +++++++++++++++++++++++++++++++++++++++++
> include/crypto/ecdh.h | 1 +
> 3 files changed, 48 insertions(+)
>
> diff --git a/crypto/ecc.c b/crypto/ecc.c
> index ead40b5ebb46..4f6fa8617308 100644
> --- a/crypto/ecc.c
> +++ b/crypto/ecc.c
> @@ -60,6 +60,8 @@ const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
> return &nist_p256;
> case ECC_CURVE_NIST_P384:
> return &nist_p384;
> + case ECC_CURVE_NIST_P521:
> + return &nist_p521;
> default:
> return NULL;
> }
> diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h
> index ab1ef3d94be5..0ecade7d02f5 100644
> --- a/crypto/ecc_curve_defs.h
> +++ b/crypto/ecc_curve_defs.h
> @@ -89,6 +89,51 @@ static struct ecc_curve nist_p384 = {
> .b = nist_p384_b
> };
>
> +/* NIST P-521 */
> +static u64 nist_p521_g_x[] = { 0xf97e7e31c2e5bd66ull, 0x3348b3c1856a429bull,
> + 0xfe1dc127a2ffa8deull, 0xa14b5e77efe75928ull,
> + 0xf828af606b4d3dbaull, 0x9c648139053fb521ull,
> + 0x9e3ecb662395b442ull, 0x858e06b70404e9cdull,
> + 0xc6ull };
> +static u64 nist_p521_g_y[] = { 0x88be94769fd16650ull, 0x353c7086a272c240ull,
> + 0xc550b9013fad0761ull, 0x97ee72995ef42640ull,
> + 0x17afbd17273e662cull, 0x98f54449579b4468ull,
> + 0x5c8a5fb42c7d1bd9ull, 0x39296a789a3bc004ull,
> + 0x118ull };
> +static u64 nist_p521_p[] = { 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0x1ffull };
> +static u64 nist_p521_n[] = { 0xbb6fb71e91386409ull, 0x3bb5c9b8899c47aeull,
> + 0x7fcc0148f709a5d0ull, 0x51868783bf2f966bull,
> + 0xfffffffffffffffaull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0x1ffull };
> +static u64 nist_p521_a[] = { 0xfffffffffffffffcull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0xffffffffffffffffull, 0xffffffffffffffffull,
> + 0x1ffull };
> +static u64 nist_p521_b[] = { 0xef451fd46b503f00ull, 0x3573df883d2c34f1ull,
> + 0x1652c0bd3bb1bf07ull, 0x56193951ec7e937bull,
> + 0xb8b489918ef109e1ull, 0xa2da725b99b315f3ull,
> + 0x929a21a0b68540eeull, 0x953eb9618e1c9a1full,
> + 0x051ull };
> +static struct ecc_curve nist_p521 = {
> + .name = "nist_521",
> + .nbits = 521,
> + .g = {
> + .x = nist_p521_g_x,
> + .y = nist_p521_g_y,
> + .ndigits = 9,
> + },
> + .p = nist_p521_p,
> + .n = nist_p521_n,
> + .a = nist_p521_a,
> + .b = nist_p521_b
> +};
> +
> /* curve25519 */
> static u64 curve25519_g_x[] = { 0x0000000000000009, 0x0000000000000000,
> 0x0000000000000000, 0x0000000000000000 };
> diff --git a/include/crypto/ecdh.h b/include/crypto/ecdh.h
> index a9f98078d29c..9784ecdd2fb4 100644
> --- a/include/crypto/ecdh.h
> +++ b/include/crypto/ecdh.h
> @@ -26,6 +26,7 @@
> #define ECC_CURVE_NIST_P192 0x0001
> #define ECC_CURVE_NIST_P256 0x0002
> #define ECC_CURVE_NIST_P384 0x0003
> +#define ECC_CURVE_NIST_P521 0x0004
>
> /**
> * struct ecdh - define an ECDH private key
Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
BR, Jarkko
