2021-01-07 12:19:05

by yumeng

[permalink] [raw]
Subject: [PATCH v6 4/6] crypto: expose elliptic curve parameters as Crypto APIs

Move elliptic curves definition to 'include/crypto/ecc_curve_defs.h',
so all can use it,

Signed-off-by: Meng Yu <[email protected]>
Reviewed-by: Zaibo Xu <[email protected]>
---
crypto/ecc.c | 1 -
crypto/ecc.h | 37 +----------------
crypto/ecc_curve_defs.h | 57 -------------------------
crypto/ecrdsa_defs.h | 2 +-
include/crypto/ecc_curve_defs.h | 92 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 95 insertions(+), 94 deletions(-)
delete mode 100644 crypto/ecc_curve_defs.h
create mode 100644 include/crypto/ecc_curve_defs.h

diff --git a/crypto/ecc.c b/crypto/ecc.c
index c80aa25..f23efdd 100644
--- a/crypto/ecc.c
+++ b/crypto/ecc.c
@@ -35,7 +35,6 @@
#include <linux/ratelimit.h>

#include "ecc.h"
-#include "ecc_curve_defs.h"

typedef struct {
u64 m_low;
diff --git a/crypto/ecc.h b/crypto/ecc.h
index d4e546b..e5afaf3 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_defs.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
diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h
deleted file mode 100644
index 69be6c7..0000000
--- a/crypto/ecc_curve_defs.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _CRYTO_ECC_CURVE_DEFS_H
-#define _CRYTO_ECC_CURVE_DEFS_H
-
-/* NIST P-192: a = p - 3 */
-static u64 nist_p192_g_x[] = { 0xF4FF0AFD82FF1012ull, 0x7CBF20EB43A18800ull,
- 0x188DA80EB03090F6ull };
-static u64 nist_p192_g_y[] = { 0x73F977A11E794811ull, 0x631011ED6B24CDD5ull,
- 0x07192B95FFC8DA78ull };
-static u64 nist_p192_p[] = { 0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFEull,
- 0xFFFFFFFFFFFFFFFFull };
-static u64 nist_p192_n[] = { 0x146BC9B1B4D22831ull, 0xFFFFFFFF99DEF836ull,
- 0xFFFFFFFFFFFFFFFFull };
-static u64 nist_p192_a[] = { 0xFFFFFFFFFFFFFFFCull, 0xFFFFFFFFFFFFFFFEull,
- 0xFFFFFFFFFFFFFFFFull };
-static u64 nist_p192_b[] = { 0xFEB8DEECC146B9B1ull, 0x0FA7E9AB72243049ull,
- 0x64210519E59C80E7ull };
-static struct ecc_curve nist_p192 = {
- .name = "nist_192",
- .g = {
- .x = nist_p192_g_x,
- .y = nist_p192_g_y,
- .ndigits = 3,
- },
- .p = nist_p192_p,
- .n = nist_p192_n,
- .a = nist_p192_a,
- .b = nist_p192_b
-};
-
-/* NIST P-256: a = p - 3 */
-static u64 nist_p256_g_x[] = { 0xF4A13945D898C296ull, 0x77037D812DEB33A0ull,
- 0xF8BCE6E563A440F2ull, 0x6B17D1F2E12C4247ull };
-static u64 nist_p256_g_y[] = { 0xCBB6406837BF51F5ull, 0x2BCE33576B315ECEull,
- 0x8EE7EB4A7C0F9E16ull, 0x4FE342E2FE1A7F9Bull };
-static u64 nist_p256_p[] = { 0xFFFFFFFFFFFFFFFFull, 0x00000000FFFFFFFFull,
- 0x0000000000000000ull, 0xFFFFFFFF00000001ull };
-static u64 nist_p256_n[] = { 0xF3B9CAC2FC632551ull, 0xBCE6FAADA7179E84ull,
- 0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFF00000000ull };
-static u64 nist_p256_a[] = { 0xFFFFFFFFFFFFFFFCull, 0x00000000FFFFFFFFull,
- 0x0000000000000000ull, 0xFFFFFFFF00000001ull };
-static u64 nist_p256_b[] = { 0x3BCE3C3E27D2604Bull, 0x651D06B0CC53B0F6ull,
- 0xB3EBBD55769886BCull, 0x5AC635D8AA3A93E7ull };
-static struct ecc_curve nist_p256 = {
- .name = "nist_256",
- .g = {
- .x = nist_p256_g_x,
- .y = nist_p256_g_y,
- .ndigits = 4,
- },
- .p = nist_p256_p,
- .n = nist_p256_n,
- .a = nist_p256_a,
- .b = nist_p256_b
-};
-
-#endif
diff --git a/crypto/ecrdsa_defs.h b/crypto/ecrdsa_defs.h
index 170baf0..2074099 100644
--- a/crypto/ecrdsa_defs.h
+++ b/crypto/ecrdsa_defs.h
@@ -13,7 +13,7 @@
#ifndef _CRYTO_ECRDSA_DEFS_H
#define _CRYTO_ECRDSA_DEFS_H

-#include "ecc.h"
+#include <crypto/ecc_curve_defs.h>

#define ECRDSA_MAX_SIG_SIZE (2 * 512 / 8)
#define ECRDSA_MAX_DIGITS (512 / 64)
diff --git a/include/crypto/ecc_curve_defs.h b/include/crypto/ecc_curve_defs.h
new file mode 100644
index 0000000..1080766
--- /dev/null
+++ b/include/crypto/ecc_curve_defs.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _CRYTO_ECC_CURVE_DEFS_H
+#define _CRYTO_ECC_CURVE_DEFS_H
+
+/**
+ * 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;
+};
+
+/**
+ * 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;
+};
+
+/* NIST P-192: a = p - 3 */
+static u64 nist_p192_g_x[] = { 0xF4FF0AFD82FF1012ull, 0x7CBF20EB43A18800ull,
+ 0x188DA80EB03090F6ull };
+static u64 nist_p192_g_y[] = { 0x73F977A11E794811ull, 0x631011ED6B24CDD5ull,
+ 0x07192B95FFC8DA78ull };
+static u64 nist_p192_p[] = { 0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFEull,
+ 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p192_n[] = { 0x146BC9B1B4D22831ull, 0xFFFFFFFF99DEF836ull,
+ 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p192_a[] = { 0xFFFFFFFFFFFFFFFCull, 0xFFFFFFFFFFFFFFFEull,
+ 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p192_b[] = { 0xFEB8DEECC146B9B1ull, 0x0FA7E9AB72243049ull,
+ 0x64210519E59C80E7ull };
+static struct ecc_curve nist_p192 = {
+ .name = "nist_192",
+ .g = {
+ .x = nist_p192_g_x,
+ .y = nist_p192_g_y,
+ .ndigits = 3,
+ },
+ .p = nist_p192_p,
+ .n = nist_p192_n,
+ .a = nist_p192_a,
+ .b = nist_p192_b
+};
+
+/* NIST P-256: a = p - 3 */
+static u64 nist_p256_g_x[] = { 0xF4A13945D898C296ull, 0x77037D812DEB33A0ull,
+ 0xF8BCE6E563A440F2ull, 0x6B17D1F2E12C4247ull };
+static u64 nist_p256_g_y[] = { 0xCBB6406837BF51F5ull, 0x2BCE33576B315ECEull,
+ 0x8EE7EB4A7C0F9E16ull, 0x4FE342E2FE1A7F9Bull };
+static u64 nist_p256_p[] = { 0xFFFFFFFFFFFFFFFFull, 0x00000000FFFFFFFFull,
+ 0x0000000000000000ull, 0xFFFFFFFF00000001ull };
+static u64 nist_p256_n[] = { 0xF3B9CAC2FC632551ull, 0xBCE6FAADA7179E84ull,
+ 0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFF00000000ull };
+static u64 nist_p256_a[] = { 0xFFFFFFFFFFFFFFFCull, 0x00000000FFFFFFFFull,
+ 0x0000000000000000ull, 0xFFFFFFFF00000001ull };
+static u64 nist_p256_b[] = { 0x3BCE3C3E27D2604Bull, 0x651D06B0CC53B0F6ull,
+ 0xB3EBBD55769886BCull, 0x5AC635D8AA3A93E7ull };
+static struct ecc_curve nist_p256 = {
+ .name = "nist_256",
+ .g = {
+ .x = nist_p256_g_x,
+ .y = nist_p256_g_y,
+ .ndigits = 4,
+ },
+ .p = nist_p256_p,
+ .n = nist_p256_n,
+ .a = nist_p256_a,
+ .b = nist_p256_b
+};
+
+#endif
--
2.8.1