1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* Copyright (c) 2021 HiSilicon */ |
3 | |
4 | #ifndef _CRYTO_ECC_CURVE_H |
5 | #define _CRYTO_ECC_CURVE_H |
6 | |
7 | #include <linux/types.h> |
8 | |
9 | /** |
10 | * struct ecc_point - elliptic curve point in affine coordinates |
11 | * |
12 | * @x: X coordinate in vli form. |
13 | * @y: Y coordinate in vli form. |
14 | * @ndigits: Length of vlis in u64 qwords. |
15 | */ |
16 | struct ecc_point { |
17 | u64 *x; |
18 | u64 *y; |
19 | u8 ndigits; |
20 | }; |
21 | |
22 | /** |
23 | * struct ecc_curve - definition of elliptic curve |
24 | * |
25 | * @name: Short name of the curve. |
26 | * @g: Generator point of the curve. |
27 | * @p: Prime number, if Barrett's reduction is used for this curve |
28 | * pre-calculated value 'mu' is appended to the @p after ndigits. |
29 | * Use of Barrett's reduction is heuristically determined in |
30 | * vli_mmod_fast(). |
31 | * @n: Order of the curve group. |
32 | * @a: Curve parameter a. |
33 | * @b: Curve parameter b. |
34 | */ |
35 | struct ecc_curve { |
36 | char *name; |
37 | struct ecc_point g; |
38 | u64 *p; |
39 | u64 *n; |
40 | u64 *a; |
41 | u64 *b; |
42 | }; |
43 | |
44 | /** |
45 | * ecc_get_curve() - get elliptic curve; |
46 | * @curve_id: Curves IDs: |
47 | * defined in 'include/crypto/ecdh.h'; |
48 | * |
49 | * Returns curve if get curve succssful, NULL otherwise |
50 | */ |
51 | const struct ecc_curve *ecc_get_curve(unsigned int curve_id); |
52 | |
53 | /** |
54 | * ecc_get_curve25519() - get curve25519 curve; |
55 | * |
56 | * Returns curve25519 |
57 | */ |
58 | const struct ecc_curve *ecc_get_curve25519(void); |
59 | |
60 | #endif |
61 | |