1. Add curve 25519 parameters; 2. Add curve25519 function 'ecc_get_curve25519_param', to be exposed to everyone in kernel tree.
Signed-off-by: Meng Yu <yumen...@huawei.com> Reviewed-by: Zaibo Xu <xuza...@huawei.com> --- crypto/ecc.c | 7 +++++++ crypto/ecc_curve_defs.h | 17 +++++++++++++++++ include/crypto/ecc_curve.h | 7 +++++++ 3 files changed, 31 insertions(+) diff --git a/crypto/ecc.c b/crypto/ecc.c index cfa1dc3..025b5e6e 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -53,6 +53,13 @@ const struct ecc_curve *ecc_get_curve_by_id(unsigned int curve_id) } EXPORT_SYMBOL(ecc_get_curve_by_id); +/* Returns curv25519 curve param */ +const struct ecc_curve *ecc_get_curve25519(void) +{ + return &ecc_25519; +} +EXPORT_SYMBOL(ecc_get_curve25519); + static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id) { switch (curve_id) { diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h index b81e580..91b3d4b 100644 --- a/crypto/ecc_curve_defs.h +++ b/crypto/ecc_curve_defs.h @@ -160,4 +160,21 @@ static const struct ecc_curve ecc_curve_list[] = { } }; +/* curve25519 */ +static u64 curve25519_g_x[] = { 0x0000000000000009, 0x0000000000000000, + 0x0000000000000000, 0x0000000000000000 }; +static u64 curve25519_p[] = { 0xffffffffffffffed, 0xffffffffffffffff, + 0xffffffffffffffff, 0x7fffffffffffffff }; +static u64 curve25519_a[] = { 0x000000000001DB41, 0x0000000000000000, + 0x0000000000000000, 0x0000000000000000 }; +static const struct ecc_curve ecc_25519 = { + .name = "curve25519", + .g = { + .x = curve25519_g_x, + .ndigits = 4, + }, + .p = curve25519_p, + .a = curve25519_a, +}; + #endif diff --git a/include/crypto/ecc_curve.h b/include/crypto/ecc_curve.h index a3adf1e..2d22647 100644 --- a/include/crypto/ecc_curve.h +++ b/include/crypto/ecc_curve.h @@ -50,4 +50,11 @@ struct ecc_curve { */ const struct ecc_curve *ecc_get_curve_by_id(unsigned int curve_id); +/** + * ecc_get_curve25519() - get curve25519 curve; + * + * Returns curve25519 + */ +const struct ecc_curve *ecc_get_curve25519(void); + #endif \ No newline at end of file -- 2.8.1