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authorDaniele Alessandrelli <daniele.alessandrelli@intel.com>2021-10-20 12:35:36 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2021-10-29 15:04:03 +0200
commiteaffe377e168d25c52091cf31f5a7a6511897857 (patch)
treece6b9492f254eb5bd5250472a2951ee566e04dc8 /include/crypto/internal
parentcrypto: ecc - Move ecc.h to include/crypto/internal (diff)
downloadlinux-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.h36
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