forked from coreos/etcd-operator
/
tls.go
67 lines (59 loc) · 1.63 KB
/
tls.go
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// Copyright 2017 The etcd-operator Authors
//
// 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 etcdutil
import (
"crypto/tls"
"io/ioutil"
"os"
"path/filepath"
"github.com/coreos/etcd/pkg/transport"
)
const (
CliCertFile = "etcd-client.crt"
CliKeyFile = "etcd-client.key"
CliCAFile = "etcd-client-ca.crt"
)
func NewTLSConfig(certData, keyData, caData []byte) (*tls.Config, error) {
dir, err := ioutil.TempDir("", "etcd-operator-cluster-tls")
if err != nil {
return nil, err
}
defer os.RemoveAll(dir)
certFile, err := writeFile(dir, CliCertFile, certData)
if err != nil {
return nil, err
}
keyFile, err := writeFile(dir, CliKeyFile, keyData)
if err != nil {
return nil, err
}
caFile, err := writeFile(dir, CliCAFile, caData)
if err != nil {
return nil, err
}
tlsInfo := transport.TLSInfo{
CertFile: certFile,
KeyFile: keyFile,
TrustedCAFile: caFile,
}
tlsConfig, err := tlsInfo.ClientConfig()
if err != nil {
return nil, err
}
return tlsConfig, nil
}
func writeFile(dir, file string, data []byte) (string, error) {
p := filepath.Join(dir, file)
return p, ioutil.WriteFile(p, data, 0600)
}