1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// Copyright 2014 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package upgrades
import (
"fmt"
"io/ioutil"
"os"
"path"
"launchpad.net/juju-core/environs/cloudinit"
"launchpad.net/juju-core/environs/config"
"launchpad.net/juju-core/state/api/keymanager"
"launchpad.net/juju-core/utils/ssh"
)
func ensureSystemSSHKey(context Context) error {
identityFile := path.Join(context.AgentConfig().DataDir(), cloudinit.SystemIdentity)
// Don't generate a key unless we have to.
keyExists, err := systemKeyExists(identityFile)
if err != nil {
return fmt.Errorf("failed to check system key exists: %v", err)
}
if keyExists {
return nil
}
privateKey, publicKey, err := ssh.GenerateKey(config.JujuSystemKey)
if err != nil {
return fmt.Errorf("failed to create system key: %v", err)
}
// Write new authorised key.
keyManager := keymanager.NewClient(context.APIState())
errResults, err := keyManager.AddKeys(config.JujuSystemKey, publicKey)
apiErr := err
if apiErr == nil {
apiErr = errResults[0].Error
}
if err != nil || errResults[0].Error != nil {
return fmt.Errorf("failed to update authoised keys with new system key: %v", apiErr)
}
return ioutil.WriteFile(identityFile, []byte(privateKey), 0600)
}
func systemKeyExists(identityFile string) (bool, error) {
_, err := os.Stat(identityFile)
if err == nil {
return true, nil
}
if !os.IsNotExist(err) {
return false, err
}
return false, nil
}
|