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14bb7676 MY |
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. | |
c0d6bd1f | 26 | * @nbits: The number of bits of a curve. |
14bb7676 MY |
27 | * @g: Generator point of the curve. |
28 | * @p: Prime number, if Barrett's reduction is used for this curve | |
29 | * pre-calculated value 'mu' is appended to the @p after ndigits. | |
30 | * Use of Barrett's reduction is heuristically determined in | |
31 | * vli_mmod_fast(). | |
32 | * @n: Order of the curve group. | |
33 | * @a: Curve parameter a. | |
34 | * @b: Curve parameter b. | |
35 | */ | |
36 | struct ecc_curve { | |
37 | char *name; | |
c0d6bd1f | 38 | u32 nbits; |
14bb7676 MY |
39 | struct ecc_point g; |
40 | u64 *p; | |
41 | u64 *n; | |
42 | u64 *a; | |
43 | u64 *b; | |
44 | }; | |
45 | ||
46 | /** | |
47 | * ecc_get_curve() - get elliptic curve; | |
48 | * @curve_id: Curves IDs: | |
49 | * defined in 'include/crypto/ecdh.h'; | |
50 | * | |
51 | * Returns curve if get curve succssful, NULL otherwise | |
52 | */ | |
53 | const struct ecc_curve *ecc_get_curve(unsigned int curve_id); | |
54 | ||
8fb9340e MY |
55 | /** |
56 | * ecc_get_curve25519() - get curve25519 curve; | |
57 | * | |
58 | * Returns curve25519 | |
59 | */ | |
60 | const struct ecc_curve *ecc_get_curve25519(void); | |
61 | ||
14bb7676 | 62 | #endif |