diff options
Diffstat (limited to '')
| -rw-r--r-- | include/crypto/internal/ecc.h (renamed from crypto/ecc.h) | 100 |
1 files changed, 68 insertions, 32 deletions
diff --git a/crypto/ecc.h b/include/crypto/internal/ecc.h index ab0eb70b9c09..4f6c1a68882f 100644 --- a/crypto/ecc.h +++ b/include/crypto/internal/ecc.h @@ -26,49 +26,35 @@ #ifndef _CRYPTO_ECC_H #define _CRYPTO_ECC_H +#include <crypto/ecc_curve.h> +#include <asm/unaligned.h> + /* One digit is u64 qword. */ #define ECC_CURVE_NIST_P192_DIGITS 3 #define ECC_CURVE_NIST_P256_DIGITS 4 -#define ECC_MAX_DIGITS (512 / 64) +#define ECC_CURVE_NIST_P384_DIGITS 6 +#define ECC_MAX_DIGITS (512 / 64) /* due to ecrdsa */ #define ECC_DIGITS_TO_BYTES_SHIFT 3 -/** - * struct ecc_point - elliptic curve point in affine coordinates - * - * @x: X coordinate in vli form. - * @y: Y coordinate in vli form. - * @ndigits: Length of vlis in u64 qwords. - */ -struct ecc_point { - u64 *x; - u64 *y; - u8 ndigits; -}; +#define ECC_MAX_BYTES (ECC_MAX_DIGITS << ECC_DIGITS_TO_BYTES_SHIFT) #define ECC_POINT_INIT(x, y, ndigits) (struct ecc_point) { x, y, ndigits } /** - * struct ecc_curve - definition of elliptic curve - * - * @name: Short name of the curve. - * @g: Generator point of the curve. - * @p: Prime number, if Barrett's reduction is used for this curve - * pre-calculated value 'mu' is appended to the @p after ndigits. - * Use of Barrett's reduction is heuristically determined in - * vli_mmod_fast(). - * @n: Order of the curve group. - * @a: Curve parameter a. - * @b: Curve parameter b. + * ecc_swap_digits() - Copy ndigits from big endian array to native array + * @in: Input array + * @out: Output array + * @ndigits: Number of digits to copy */ -struct ecc_curve { - char *name; - struct ecc_point g; - u64 *p; - u64 *n; - u64 *a; - u64 *b; -}; +static inline void ecc_swap_digits(const void *in, u64 *out, unsigned int ndigits) +{ + const __be64 *src = (__force __be64 *)in; + int i; + + for (i = 0; i < ndigits; i++) + out[i] = get_unaligned_be64(&src[ndigits - 1 - i]); +} /** * ecc_is_key_valid() - Validate a given ECDH private key @@ -148,6 +134,20 @@ int ecc_is_pubkey_valid_partial(const struct ecc_curve *curve, struct ecc_point *pk); /** + * ecc_is_pubkey_valid_full() - Full public key validation + * + * @curve: elliptic curve domain parameters + * @pk: public key as a point + * + * Valdiate public key according to SP800-56A section 5.6.2.3.3 ECC Full + * Public-Key Validation Routine. + * + * Return: 0 if validation is successful, -EINVAL if validation is failed. + */ +int ecc_is_pubkey_valid_full(const struct ecc_curve *curve, + struct ecc_point *pk); + +/** * vli_is_zero() - Determine is vli is zero * * @vli: vli to check. @@ -226,6 +226,41 @@ void vli_mod_mult_slow(u64 *result, const u64 *left, const u64 *right, const u64 *mod, unsigned int ndigits); /** + * vli_num_bits() - Counts the number of bits required for vli. + * + * @vli: vli to check. + * @ndigits: Length of the @vli + * + * Return: The number of bits required to represent @vli. + */ +unsigned int vli_num_bits(const u64 *vli, unsigned int ndigits); + +/** + * ecc_aloc_point() - Allocate ECC point. + * + * @ndigits: Length of vlis in u64 qwords. + * + * Return: Pointer to the allocated point or NULL if allocation failed. + */ +struct ecc_point *ecc_alloc_point(unsigned int ndigits); + +/** + * ecc_free_point() - Free ECC point. + * + * @p: The point to free. + */ +void ecc_free_point(struct ecc_point *p); + +/** + * ecc_point_is_zero() - Check if point is zero. + * + * @p: Point to check for zero. + * + * Return: true if point is the point at infinity, false otherwise. + */ +bool ecc_point_is_zero(const struct ecc_point *point); + +/** * ecc_point_mult_shamir() - Add two points multiplied by scalars * * @result: resulting point @@ -242,4 +277,5 @@ void ecc_point_mult_shamir(const struct ecc_point *result, const u64 *x, const struct ecc_point *p, const u64 *y, const struct ecc_point *q, const struct ecc_curve *curve); + #endif |