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node_key.go
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node_key.go
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package types
import (
"encoding/json"
"os"
"github.com/dashpay/tenderdash/crypto"
"github.com/dashpay/tenderdash/crypto/ed25519"
"github.com/dashpay/tenderdash/internal/jsontypes"
tmos "github.com/dashpay/tenderdash/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
// Private key
PrivKey crypto.PrivKey
}
type nodeKeyJSON struct {
ID NodeID `json:"id"`
PrivKey json.RawMessage `json:"priv_key"`
}
func (nk NodeKey) MarshalJSON() ([]byte, error) {
pk, err := jsontypes.Marshal(nk.PrivKey)
if err != nil {
return nil, err
}
return json.Marshal(nodeKeyJSON{
ID: nk.ID, PrivKey: pk,
})
}
func (nk *NodeKey) UnmarshalJSON(data []byte) error {
var nkjson nodeKeyJSON
if err := json.Unmarshal(data, &nkjson); err != nil {
return err
}
var pk crypto.PrivKey
if err := jsontypes.Unmarshal(nkjson.PrivKey, &pk); err != nil {
return err
}
*nk = NodeKey{ID: nkjson.ID, PrivKey: pk}
return nil
}
// PubKey returns the peer's PubKey
func (nk NodeKey) PubKey() crypto.PubKey {
return nk.PrivKey.PubKey()
}
// SaveAs persists the NodeKey to filePath.
func (nk NodeKey) SaveAs(filePath string) error {
jsonBytes, err := json.Marshal(nk)
if err != nil {
return err
}
return os.WriteFile(filePath, jsonBytes, 0600)
}
// 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 := os.ReadFile(filePath)
if err != nil {
return NodeKey{}, err
}
nodeKey := NodeKey{}
err = json.Unmarshal(jsonBytes, &nodeKey)
if err != nil {
return NodeKey{}, err
}
nodeKey.ID = NodeIDFromPubKey(nodeKey.PubKey())
return nodeKey, nil
}