mirror of https://github.com/status-im/consul.git
115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
package agent
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
|
|
"github.com/hashicorp/consul/consul/structs"
|
|
"github.com/hashicorp/memberlist"
|
|
"github.com/hashicorp/serf/serf"
|
|
)
|
|
|
|
const (
|
|
SerfLANKeyring = "serf/local.keyring"
|
|
SerfWANKeyring = "serf/remote.keyring"
|
|
)
|
|
|
|
// loadKeyringFile will load a gossip encryption keyring out of a file. The file
|
|
// must be in JSON format and contain a list of encryption key strings.
|
|
func loadKeyringFile(c *serf.Config) error {
|
|
if c.KeyringFile == "" {
|
|
return nil
|
|
}
|
|
|
|
if _, err := os.Stat(c.KeyringFile); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Read in the keyring file data
|
|
keyringData, err := ioutil.ReadFile(c.KeyringFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Decode keyring JSON
|
|
keys := make([]string, 0)
|
|
if err := json.Unmarshal(keyringData, &keys); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Decode base64 values
|
|
keysDecoded := make([][]byte, len(keys))
|
|
for i, key := range keys {
|
|
keyBytes, err := base64.StdEncoding.DecodeString(key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
keysDecoded[i] = keyBytes
|
|
}
|
|
|
|
// Guard against empty keyring
|
|
if len(keysDecoded) == 0 {
|
|
return fmt.Errorf("no keys present in keyring file: %s", c.KeyringFile)
|
|
}
|
|
|
|
// Create the keyring
|
|
keyring, err := memberlist.NewKeyring(keysDecoded, keysDecoded[0])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
c.MemberlistConfig.Keyring = keyring
|
|
|
|
// Success!
|
|
return nil
|
|
}
|
|
|
|
// keyringProcess is used to abstract away the semantic similarities in
|
|
// performing various operations on the encryption keyring.
|
|
func (a *Agent) keyringProcess(
|
|
method string,
|
|
args *structs.KeyringRequest) (*structs.KeyringResponses, error) {
|
|
|
|
// Allow any server to handle the request, since this is
|
|
// done over the gossip protocol.
|
|
args.AllowStale = true
|
|
|
|
var reply structs.KeyringResponses
|
|
if a.server == nil {
|
|
return nil, fmt.Errorf("keyring operations must run against a server node")
|
|
}
|
|
if err := a.RPC(method, args, &reply); err != nil {
|
|
return &reply, err
|
|
}
|
|
|
|
return &reply, nil
|
|
}
|
|
|
|
// ListKeys lists out all keys installed on the collective Consul cluster. This
|
|
// includes both servers and clients in all DC's.
|
|
func (a *Agent) ListKeys() (*structs.KeyringResponses, error) {
|
|
args := structs.KeyringRequest{Operation: structs.KeyringList}
|
|
return a.keyringProcess("Internal.KeyringOperation", &args)
|
|
}
|
|
|
|
// InstallKey installs a new gossip encryption key
|
|
func (a *Agent) InstallKey(key string) (*structs.KeyringResponses, error) {
|
|
args := structs.KeyringRequest{Key: key, Operation: structs.KeyringInstall}
|
|
return a.keyringProcess("Internal.KeyringOperation", &args)
|
|
}
|
|
|
|
// UseKey changes the primary encryption key used to encrypt messages
|
|
func (a *Agent) UseKey(key string) (*structs.KeyringResponses, error) {
|
|
args := structs.KeyringRequest{Key: key, Operation: structs.KeyringUse}
|
|
return a.keyringProcess("Internal.KeyringOperation", &args)
|
|
}
|
|
|
|
// RemoveKey will remove a gossip encryption key from the keyring
|
|
func (a *Agent) RemoveKey(key string) (*structs.KeyringResponses, error) {
|
|
args := structs.KeyringRequest{Key: key, Operation: structs.KeyringRemove}
|
|
return a.keyringProcess("Internal.KeyringOperation", &args)
|
|
}
|