/
tls.go
68 lines (61 loc) · 1.71 KB
/
tls.go
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/*
* Copyright 1999-2020 Alibaba Group Holding Ltd.
*
* 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 tls
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"github.com/5idu/nacos-sdk-go/common/constant"
)
// NewTLS returns a config structure is used to configure a TLS client
func NewTLS(c constant.TLSConfig) (tc *tls.Config, err error) {
tc = &tls.Config{}
if len(c.CertFile) > 0 && len(c.KeyFile) > 0 {
cert, err := certificate(c.CertFile, c.KeyFile)
if err != nil {
return nil, err
}
tc.Certificates = []tls.Certificate{*cert}
}
if len(c.CaFile) <= 0 {
tc.InsecureSkipVerify = true
return tc, nil
}
if len(c.ServerNameOverride) > 0 {
tc.ServerName = c.ServerNameOverride
}
tc.RootCAs, err = rootCert(c.CaFile)
return
}
func rootCert(caFile string) (*x509.CertPool, error) {
b, err := ioutil.ReadFile(caFile)
if err != nil {
return nil, err
}
cp := x509.NewCertPool()
if !cp.AppendCertsFromPEM(b) {
return nil, fmt.Errorf("credentials: failed to append certificates")
}
return cp, nil
}
func certificate(certFile, keyFile string) (*tls.Certificate, error) {
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return nil, err
}
return &cert, nil
}