1// +build go1.7
2// +build !go1.8
3
4/*
5 *
6 * Copyright 2016 gRPC authors.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 *     http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 *
20 */
21
22package credentials
23
24import (
25	"crypto/tls"
26)
27
28// cloneTLSConfig returns a shallow clone of the exported
29// fields of cfg, ignoring the unexported sync.Once, which
30// contains a mutex and must not be copied.
31//
32// If cfg is nil, a new zero tls.Config is returned.
33func cloneTLSConfig(cfg *tls.Config) *tls.Config {
34	if cfg == nil {
35		return &tls.Config{}
36	}
37	return &tls.Config{
38		Rand:                        cfg.Rand,
39		Time:                        cfg.Time,
40		Certificates:                cfg.Certificates,
41		NameToCertificate:           cfg.NameToCertificate,
42		GetCertificate:              cfg.GetCertificate,
43		RootCAs:                     cfg.RootCAs,
44		NextProtos:                  cfg.NextProtos,
45		ServerName:                  cfg.ServerName,
46		ClientAuth:                  cfg.ClientAuth,
47		ClientCAs:                   cfg.ClientCAs,
48		InsecureSkipVerify:          cfg.InsecureSkipVerify,
49		CipherSuites:                cfg.CipherSuites,
50		PreferServerCipherSuites:    cfg.PreferServerCipherSuites,
51		SessionTicketsDisabled:      cfg.SessionTicketsDisabled,
52		SessionTicketKey:            cfg.SessionTicketKey,
53		ClientSessionCache:          cfg.ClientSessionCache,
54		MinVersion:                  cfg.MinVersion,
55		MaxVersion:                  cfg.MaxVersion,
56		CurvePreferences:            cfg.CurvePreferences,
57		DynamicRecordSizingDisabled: cfg.DynamicRecordSizingDisabled,
58		Renegotiation:               cfg.Renegotiation,
59	}
60}
61