From fb7041acbc5ed50f7024277f099581d80b18868e Mon Sep 17 00:00:00 2001
From: Sun Yimin <emmansun@users.noreply.github.com>
Date: Tue, 30 Aug 2022 09:54:29 +0800
Subject: [PATCH] sm2/9: key exchange destroy, fix #80

---
 sm2/sm2_keyexchange.go | 2 --
 sm2/sm2ec/sm2ec.go     | 1 -
 sm9/sm9.go             | 6 ------
 3 files changed, 9 deletions(-)

diff --git a/sm2/sm2_keyexchange.go b/sm2/sm2_keyexchange.go
index 1e9f815..f606bc4 100644
--- a/sm2/sm2_keyexchange.go
+++ b/sm2/sm2_keyexchange.go
@@ -53,8 +53,6 @@ func (ke *KeyExchange) Destroy() {
 	destroyBytes(ke.z)
 	destroyBytes(ke.peerZ)
 	destroyBigInt(ke.r)
-	destroyPublicKey(ke.secret)
-	destroyPublicKey(ke.peerSecret)
 	destroyPublicKey(ke.v)
 }
 
diff --git a/sm2/sm2ec/sm2ec.go b/sm2/sm2ec/sm2ec.go
index 560d41e..da99f9e 100644
--- a/sm2/sm2ec/sm2ec.go
+++ b/sm2/sm2ec/sm2ec.go
@@ -8,7 +8,6 @@ import (
 	_sm2ec "github.com/emmansun/gmsm/internal/sm2ec"
 )
 
-// TODO: will merge it with sm2p256_generic.go from golang 1.18 with generic support.
 type sm2Curve struct {
 	newPoint func() *_sm2ec.SM2P256Point
 	params   *elliptic.CurveParams
diff --git a/sm9/sm9.go b/sm9/sm9.go
index 9005164..ccba988 100644
--- a/sm9/sm9.go
+++ b/sm9/sm9.go
@@ -487,12 +487,6 @@ func (ke *KeyExchange) Destroy() {
 	if ke.r != nil {
 		ke.r.SetInt64(0)
 	}
-	if ke.secret != nil {
-		ke.secret.Set(bn256.Gen1)
-	}
-	if ke.peerSecret != nil {
-		ke.peerSecret.Set(bn256.Gen1)
-	}
 	if ke.g1 != nil {
 		ke.g1.SetOne()
 	}