From de1c178aed8df57192505ab8b1aae7a579a1ba76 Mon Sep 17 00:00:00 2001
From: Emman <emman.sun@cargosmart.com>
Date: Wed, 10 Feb 2021 15:26:20 +0800
Subject: [PATCH] MAGIC - fix Inverse method

---
 sm2/p256_asm.go      | 14 +++++++-------
 sm2/p256_asm_test.go |  2 +-
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/sm2/p256_asm.go b/sm2/p256_asm.go
index b8668ba..f5bd1ab 100644
--- a/sm2/p256_asm.go
+++ b/sm2/p256_asm.go
@@ -194,16 +194,16 @@ func (curve p256Curve) Inverse(k *big.Int) *big.Int {
 	p256OrdMul(x, x, t)  // _fffffffeffffffffffffffffffffffff
 
 	sqrs := []uint8{
-		3, 3, 11, 5, 3, 5, 1,
-		3, 7, 5, 9, 7, 2, 2,
-		5, 4, 5, 2, 2, 7, 3,
-		5, 5, 6, 2, 6, 3, 5,
+		4, 3, 11, 5, 3, 5, 1,
+		3, 7, 5, 9, 7, 5, 5,
+		4, 5, 2, 2, 7, 3, 5,
+		5, 6, 2, 6, 3, 5,
 	}
 	muls := [][]uint64{
 		_111, _1, _1111, _1111, _101, _10101, _1,
-		_1, _111, _11, _101, _10101, _11, _1,
-		_111, _111, _1111, _11, _1, _1, _1,
-		_111, _111, _10101, _1, _1, _1, _1}
+		_1, _111, _11, _101, _10101, _10101, _111,
+		_111, _1111, _11, _1, _1, _1, _111,
+		_111, _10101, _1, _1, _1, _1}
 
 	for i, s := range sqrs {
 		p256OrdSqr(x, x, int(s))
diff --git a/sm2/p256_asm_test.go b/sm2/p256_asm_test.go
index 48723c7..8f9cb62 100644
--- a/sm2/p256_asm_test.go
+++ b/sm2/p256_asm_test.go
@@ -304,7 +304,7 @@ func Test_Inverse(t *testing.T) {
 	nm2 := new(big.Int).Sub(n, big.NewInt(2))
 	nm2a := make([]uint64, 4)
 	fromBig(nm2a, nm2)
-	fmt.Printf("%b, %b, %b, %b\n", nm2a[0], nm2a[1], nm2a[2], nm2a[3])
+	fmt.Printf("%0b, %0b, %b, %b\n", nm2a[0], nm2a[1], nm2a[2], nm2a[3])
 	xInv1 := fermatInverse(x, n)
 	fmt.Printf("expect=%s\n", hex.EncodeToString(xInv1.Bytes()))
 	_ = P256()