[PATCH v9 6/7] crypto: add curve25519 params and expose them
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SUPERSEDED: 1 (0M)
From: Meng Yu <hidden>
Date: 2021-02-23 07:15:52
Also in:
lkml
Subsystem:
asymmetric keys - ecdsa, crypto api, the rest · Maintainers:
Lukas Wunner, Ignat Korchagin, Herbert Xu, "David S. Miller", Linus Torvalds
Revision v9 of 5 in this series; 1 review trailer.
Revisions (5)
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 <redacted> Reviewed-by: Zaibo Xu <redacted> --- crypto/ecc.c | 6 ++++++ crypto/ecc_curve_defs.h | 17 +++++++++++++++++ include/crypto/ecc_curve.h | 7 +++++++ 3 files changed, 30 insertions(+)
diff --git a/crypto/ecc.c b/crypto/ecc.c
index 4b55ad0..0798a18 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 69be6c7..d7769cc 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 19a35da..7096478 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
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2.8.1