forked from kubicorn/kubicorn
/
ssh.go
61 lines (53 loc) · 1.58 KB
/
ssh.go
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// Copyright © 2017 The Kubicorn 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 initapi
import (
"crypto/md5"
"fmt"
"io/ioutil"
"strings"
"github.com/kris-nova/klone/pkg/local"
"github.com/kris-nova/kubicorn/apis/cluster"
"golang.org/x/crypto/ssh"
)
func sshLoader(initCluster *cluster.Cluster) (*cluster.Cluster, error) {
if initCluster.SSH.PublicKeyPath != "" {
bytes, err := ioutil.ReadFile(local.Expand(initCluster.SSH.PublicKeyPath))
if err != nil {
return nil, err
}
initCluster.SSH.PublicKeyData = bytes
fp, err := publicKeyFingerprint(bytes)
if err != nil {
return nil, err
}
initCluster.SSH.PublicKeyFingerprint = fp
}
return initCluster, nil
}
func fingerprint(key ssh.PublicKey) string {
sum := md5.Sum(key.Marshal())
parts := make([]string, len(sum))
for i := 0; i < len(sum); i++ {
parts[i] = fmt.Sprintf("%0.2x", sum[i])
}
return strings.Join(parts, ":")
}
func publicKeyFingerprint(in []byte) (string, error) {
pk, _, _, _, err := ssh.ParseAuthorizedKey(in)
if err != nil {
return "", err
}
return fingerprint(pk), nil
}