From 287a500ce1395f6be10819eea3985851d6ba8641 Mon Sep 17 00:00:00 2001
From: INADA Naoki <songofacandy@gmail.com>
Date: Mon, 2 Jul 2018 11:06:25 +0900
Subject: [PATCH] Fix caching_sha2_password with empty password

There shouldn't be trailing NUL byte for caching_sha2_password.

Fixes #825
---
 auth.go      | 2 +-
 auth_test.go | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/auth.go b/auth.go
index 0b59f52ee..2f61ecd4f 100644
--- a/auth.go
+++ b/auth.go
@@ -241,7 +241,7 @@ func (mc *mysqlConn) auth(authData []byte, plugin string) ([]byte, bool, error)
 	switch plugin {
 	case "caching_sha2_password":
 		authResp := scrambleSHA256Password(authData, mc.cfg.Passwd)
-		return authResp, (authResp == nil), nil
+		return authResp, false, nil
 
 	case "mysql_old_password":
 		if !mc.cfg.AllowOldPasswords {
diff --git a/auth_test.go b/auth_test.go
index 407363be4..bd0e2189c 100644
--- a/auth_test.go
+++ b/auth_test.go
@@ -764,7 +764,7 @@ func TestAuthSwitchCachingSHA256PasswordEmpty(t *testing.T) {
 		t.Errorf("got error: %v", err)
 	}
 
-	expectedReply := []byte{1, 0, 0, 3, 0}
+	expectedReply := []byte{0, 0, 0, 3}
 	if !bytes.Equal(conn.written, expectedReply) {
 		t.Errorf("got unexpected data: %v", conn.written)
 	}