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author | Daniele Alessandrelli <daniele.alessandrelli@intel.com> | 2021-10-20 12:35:36 +0200 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-10-29 15:04:03 +0200 |
commit | eaffe377e168d25c52091cf31f5a7a6511897857 (patch) | |
tree | ce6b9492f254eb5bd5250472a2951ee566e04dc8 /include/crypto/internal | |
parent | crypto: ecc - Move ecc.h to include/crypto/internal (diff) | |
download | linux-eaffe377e168d25c52091cf31f5a7a6511897857.tar.xz linux-eaffe377e168d25c52091cf31f5a7a6511897857.zip |
crypto: ecc - Export additional helper functions
Export the following additional ECC helper functions:
- ecc_alloc_point()
- ecc_free_point()
- vli_num_bits()
- ecc_point_is_zero()
This is done to allow future ECC device drivers to re-use existing code,
thus simplifying their implementation.
Functions are exported using EXPORT_SYMBOL() (instead of
EXPORT_SYMBOL_GPL()) to be consistent with the functions already
exported by crypto/ecc.c.
Exported functions are documented in include/crypto/internal/ecc.h.
Signed-off-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to '')
-rw-r--r-- | include/crypto/internal/ecc.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/crypto/internal/ecc.h b/include/crypto/internal/ecc.h index 1350e8eb6ac2..4f6c1a68882f 100644 --- a/include/crypto/internal/ecc.h +++ b/include/crypto/internal/ecc.h @@ -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 |