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authorMeng Yu <yumeng18@huawei.com>2021-03-04 14:35:47 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2021-03-13 00:04:03 +1100
commit14bb76768275a056a91d249525a717019fd46663 (patch)
treea79d326c5fbe0c75a0c147bacb6a7805f25b3f4d /crypto
parent6763f5ea2d9ac9b5a34a374ee637b5e4f1f525dd (diff)
crypto: ecc - expose ecc curves
Move 'ecc_get_curve' to 'include/crypto/ecc_curve.h', so everyone in kernel tree can easily get ecc curve params; Signed-off-by: Meng Yu <yumeng18@huawei.com> Reviewed-by: Zaibo Xu <xuzaibo@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/ecc.c5
-rw-r--r--crypto/ecc.h37
2 files changed, 6 insertions, 36 deletions
diff --git a/crypto/ecc.c b/crypto/ecc.c
index c80aa25994a0..4b55ad062600 100644
--- a/crypto/ecc.c
+++ b/crypto/ecc.c
@@ -24,6 +24,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <crypto/ecc_curve.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/slab.h>
@@ -42,7 +43,8 @@ typedef struct {
u64 m_high;
} uint128_t;
-static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
+
+const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
{
switch (curve_id) {
/* In FIPS mode only allow P256 and higher */
@@ -54,6 +56,7 @@ static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
return NULL;
}
}
+EXPORT_SYMBOL(ecc_get_curve);
static u64 *ecc_alloc_digits_space(unsigned int ndigits)
{
diff --git a/crypto/ecc.h b/crypto/ecc.h
index d4e546b9ad79..38a81d404821 100644
--- a/crypto/ecc.h
+++ b/crypto/ecc.h
@@ -26,6 +26,8 @@
#ifndef _CRYPTO_ECC_H
#define _CRYPTO_ECC_H
+#include <crypto/ecc_curve.h>
+
/* One digit is u64 qword. */
#define ECC_CURVE_NIST_P192_DIGITS 3
#define ECC_CURVE_NIST_P256_DIGITS 4
@@ -33,44 +35,9 @@
#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_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.
- */
-struct ecc_curve {
- char *name;
- struct ecc_point g;
- u64 *p;
- u64 *n;
- u64 *a;
- u64 *b;
-};
-
-/**
* ecc_is_key_valid() - Validate a given ECDH private key
*
* @curve_id: id representing the curve to use

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