1// +build go1.8
2
3/*
4 *
5 * Copyright 2017 gRPC authors.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 *     http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 */
20
21package credentials
22
23import (
24	"crypto/tls"
25)
26
27// cloneTLSConfig returns a shallow clone of the exported
28// fields of cfg, ignoring the unexported sync.Once, which
29// contains a mutex and must not be copied.
30//
31// If cfg is nil, a new zero tls.Config is returned.
32func cloneTLSConfig(cfg *tls.Config) *tls.Config {
33	if cfg == nil {
34		return &tls.Config{}
35	}
36
37	return cfg.Clone()
38}
39