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authorMeng Yu <yumeng18@huawei.com>2021-03-04 14:35:49 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2021-03-13 00:04:04 +1100
commit8fb9340e178ad32084fc189e6a2b2abfbc091df7 (patch)
tree6cf0e7a57c518d5559a01c5c0c128c4f8d04a4f2 /crypto
parent05e7b906aa7c8690906135dc86ab0fc12ee37481 (diff)
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>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/ecc.c6
-rw-r--r--crypto/ecc_curve_defs.h17
2 files changed, 23 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

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