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