diff options
Diffstat (limited to 'crypto/ecc.h')
| -rw-r--r-- | crypto/ecc.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/crypto/ecc.h b/crypto/ecc.h index d4e546b9ad79..e0e2aed0557a 100644 --- a/crypto/ecc.h +++ b/crypto/ecc.h @@ -33,6 +33,8 @@ #define ECC_DIGITS_TO_BYTES_SHIFT 3 +#define ECC_MAX_BYTES (ECC_MAX_DIGITS << ECC_DIGITS_TO_BYTES_SHIFT) + /** * struct ecc_point - elliptic curve point in affine coordinates * @@ -71,6 +73,29 @@ struct ecc_curve { }; /** + * ecc_swap_digits() - Copy ndigits from big endian array to native array + * @in: Input array + * @out: Output array + * @ndigits: Number of digits to copy + */ +static inline void ecc_swap_digits(const u64 *in, u64 *out, unsigned int ndigits) +{ + const __be64 *src = (__force __be64 *)in; + int i; + + for (i = 0; i < ndigits; i++) + out[i] = be64_to_cpu(src[ndigits - 1 - i]); +} + +/** + * ecc_get_curve() - Get a curve given its curve_id + * @curve_id: Id of the curve + * + * Returns pointer to the curve data, NULL if curve is not available + */ +const struct ecc_curve *ecc_get_curve(unsigned int curve_id); + +/** * ecc_is_key_valid() - Validate a given ECDH private key * * @curve_id: id representing the curve to use |