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| author | Meng Yu <yumeng18@huawei.com> | 2021-03-04 14:35:49 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-13 00:04:04 +1100 |
| commit | 8fb9340e178ad32084fc189e6a2b2abfbc091df7 (patch) | |
| tree | 6cf0e7a57c518d5559a01c5c0c128c4f8d04a4f2 | |
| parent | 05e7b906aa7c8690906135dc86ab0fc12ee37481 (diff) | |
| download | lwn-8fb9340e178ad32084fc189e6a2b2abfbc091df7.tar.gz lwn-8fb9340e178ad32084fc189e6a2b2abfbc091df7.zip | |
crypto: ecc - add curve25519 params and expose them
1. Add curve 25519 parameters in 'crypto/ecc_curve_defs.h';
2. Add curve25519 interface 'ecc_get_curve25519_param' in
'include/crypto/ecc_curve.h', to make its parameters be
exposed to everyone in kernel tree.
Signed-off-by: Meng Yu <yumeng18@huawei.com>
Reviewed-by: Zaibo Xu <xuzaibo@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/ecc.c | 6 | ||||
| -rw-r--r-- | crypto/ecc_curve_defs.h | 17 | ||||
| -rw-r--r-- | include/crypto/ecc_curve.h | 7 |
3 files changed, 30 insertions, 0 deletions
diff --git a/crypto/ecc.c b/crypto/ecc.c index 4b55ad062600..0798a1836e58 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -43,6 +43,12 @@ typedef struct { u64 m_high; } uint128_t; +/* Returns curv25519 curve param */ +const struct ecc_curve *ecc_get_curve25519(void) +{ + return &ecc_25519; +} +EXPORT_SYMBOL(ecc_get_curve25519); const struct ecc_curve *ecc_get_curve(unsigned int curve_id) { diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h index 69be6c7d228f..d7769ccc4c8e 100644 --- a/crypto/ecc_curve_defs.h +++ b/crypto/ecc_curve_defs.h @@ -54,4 +54,21 @@ static struct ecc_curve nist_p256 = { .b = nist_p256_b }; +/* 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 19a35dae88a1..70964781eb68 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(unsigned int curve_id); +/** + * ecc_get_curve25519() - get curve25519 curve; + * + * Returns curve25519 + */ +const struct ecc_curve *ecc_get_curve25519(void); + #endif |