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package types
import (
"io/ioutil"
"github.com/tendermint/tendermint/crypto"
"github.com/tendermint/tendermint/crypto/ed25519"
tmjson "github.com/tendermint/tendermint/libs/json"
tmos "github.com/tendermint/tendermint/libs/os"
)
//------------------------------------------------------------------------------
// Persistent peer ID
// TODO: encrypt on disk
// NodeKey is the persistent peer key.
// It contains the nodes private key for authentication.
type NodeKey struct {
// Canonical ID - hex-encoded pubkey's address (IDByteLength bytes)
ID NodeID `json:"id"`
// Private key
PrivKey crypto.PrivKey `json:"priv_key"`
}
// PubKey returns the peer's PubKey
func (nodeKey NodeKey) PubKey() crypto.PubKey {
return nodeKey.PrivKey.PubKey()
}
// SaveAs persists the NodeKey to filePath.
func (nodeKey NodeKey) SaveAs(filePath string) error {
jsonBytes, err := tmjson.Marshal(nodeKey)
if err != nil {
return err
}
err = ioutil.WriteFile(filePath, jsonBytes, 0600)
if err != nil {
return err
}
return nil
}
// LoadOrGenNodeKey attempts to load the NodeKey from the given filePath. If
// the file does not exist, it generates and saves a new NodeKey.
func LoadOrGenNodeKey(filePath string) (NodeKey, error) {
if tmos.FileExists(filePath) {
nodeKey, err := LoadNodeKey(filePath)
if err != nil {
return NodeKey{}, err
}
return nodeKey, nil
}
nodeKey := GenNodeKey()
if err := nodeKey.SaveAs(filePath); err != nil {
return NodeKey{}, err
}
return nodeKey, nil
}
// GenNodeKey generates a new node key.
func GenNodeKey() NodeKey {
privKey := ed25519.GenPrivKey()
return NodeKey{
ID: NodeIDFromPubKey(privKey.PubKey()),
PrivKey: privKey,
}
}
// LoadNodeKey loads NodeKey located in filePath.
func LoadNodeKey(filePath string) (NodeKey, error) {
jsonBytes, err := ioutil.ReadFile(filePath)
if err != nil {
return NodeKey{}, err
}
nodeKey := NodeKey{}
err = tmjson.Unmarshal(jsonBytes, &nodeKey)
if err != nil {
return NodeKey{}, err
}
nodeKey.ID = NodeIDFromPubKey(nodeKey.PubKey())
return nodeKey, nil
}