diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-26 09:55:55 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-26 09:55:55 +0100 |
| commit | 3877869d13a043a2dbab0d034e5eac3b21f4994d (patch) | |
| tree | 187ed20226bc810997d968365cc25dbb683c0977 /crypto/ecc.h | |
| parent | hwrng: cctrng - delete redundant printing of return value (diff) | |
| parent | x509: Add OID for NIST P384 and extend parser for it (diff) | |
| download | linux-3877869d13a043a2dbab0d034e5eac3b21f4994d.tar.xz linux-3877869d13a043a2dbab0d034e5eac3b21f4994d.zip | |
Merge branch 'ecc'
This pulls in the NIST P384/256/192 x509 changes.
Diffstat (limited to 'crypto/ecc.h')
| -rw-r--r-- | crypto/ecc.h | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/crypto/ecc.h b/crypto/ecc.h index 38a81d404821..46aa9bc03ddc 100644 --- a/crypto/ecc.h +++ b/crypto/ecc.h @@ -31,13 +31,39 @@ /* 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 +#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 } /** + * 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 |