69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
/*
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* Copyright 1999-2020 Alibaba Group Holding Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package tls
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import (
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"io/ioutil"
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"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
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)
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// NewTLS returns a config structure is used to configure a TLS client
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func NewTLS(c constant.TLSConfig) (tc *tls.Config, err error) {
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tc = &tls.Config{}
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if len(c.CertFile) > 0 && len(c.KeyFile) > 0 {
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cert, err := certificate(c.CertFile, c.KeyFile)
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if err != nil {
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return nil, err
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}
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tc.Certificates = []tls.Certificate{*cert}
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}
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if len(c.CaFile) <= 0 {
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tc.InsecureSkipVerify = true
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return tc, nil
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}
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if len(c.ServerNameOverride) > 0 {
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tc.ServerName = c.ServerNameOverride
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}
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tc.RootCAs, err = rootCert(c.CaFile)
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return
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}
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func rootCert(caFile string) (*x509.CertPool, error) {
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b, err := ioutil.ReadFile(caFile)
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if err != nil {
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return nil, err
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}
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cp := x509.NewCertPool()
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if !cp.AppendCertsFromPEM(b) {
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return nil, fmt.Errorf("credentials: failed to append certificates")
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}
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return cp, nil
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}
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func certificate(certFile, keyFile string) (*tls.Certificate, error) {
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cert, err := tls.LoadX509KeyPair(certFile, keyFile)
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if err != nil {
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return nil, err
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}
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return &cert, nil
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}
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