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tls.go
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tls.go
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// Copyright 2017-2019 Lei Ni (nilei81@gmail.com)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package netutil
import (
"crypto/tls"
"crypto/x509"
"errors"
"io/ioutil"
"path/filepath"
"strings"
)
// GetHost return sthe host component from the specified address.
func GetHost(addr string) (string, error) {
in := strings.TrimSpace(addr)
parts := strings.Split(in, ":")
if len(parts) != 2 || len(parts[0]) == 0 || len(parts[1]) == 0 {
return "", errors.New("invalid address")
}
return parts[0], nil
}
// GetServerTLSConfig returns the server TLS config.
func GetServerTLSConfig(caFile string, certFile string,
keyFile string) (*tls.Config, error) {
certificate, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return nil, err
}
certPool := x509.NewCertPool()
bs, err := ioutil.ReadFile(filepath.Clean(caFile))
if err != nil {
return nil, err
}
ok := certPool.AppendCertsFromPEM(bs)
if !ok {
return nil, errors.New("failed to append certs")
}
tlsConfig := &tls.Config{
ClientAuth: tls.RequireAndVerifyClientCert,
Certificates: []tls.Certificate{certificate},
ClientCAs: certPool,
}
return tlsConfig, nil
}
// GetClientTLSConfig returns client TLS config.
func GetClientTLSConfig(hostname string,
caFile string, certFile string, keyFile string) (*tls.Config, error) {
certificate, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return nil, err
}
certPool := x509.NewCertPool()
bs, err := ioutil.ReadFile(filepath.Clean(caFile))
if err != nil {
return nil, err
}
ok := certPool.AppendCertsFromPEM(bs)
if !ok {
return nil, errors.New("failed to append certs")
}
tlsConfig := &tls.Config{
ServerName: hostname,
Certificates: []tls.Certificate{certificate},
RootCAs: certPool,
}
return tlsConfig, nil
}