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94 lines
2.3 KiB
94 lines
2.3 KiB
package p2p
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import (
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"encoding/hex"
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"io/ioutil"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/crypto/ed25519"
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tmjson "github.com/tendermint/tendermint/libs/json"
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tmos "github.com/tendermint/tendermint/libs/os"
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)
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// ID is a hex-encoded crypto.Address
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type ID string
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// IDByteLength is the length of a crypto.Address. Currently only 20.
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// TODO: support other length addresses ?
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const IDByteLength = crypto.AddressSize
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//------------------------------------------------------------------------------
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// Persistent peer ID
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// TODO: encrypt on disk
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// NodeKey is the persistent peer key.
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// It contains the nodes private key for authentication.
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type NodeKey struct {
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PrivKey crypto.PrivKey `json:"priv_key"` // our priv key
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}
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// ID returns the peer's canonical ID - the hash of its public key.
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func (nodeKey *NodeKey) ID() ID {
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return PubKeyToID(nodeKey.PubKey())
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}
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// PubKey returns the peer's PubKey
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func (nodeKey *NodeKey) PubKey() crypto.PubKey {
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return nodeKey.PrivKey.PubKey()
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}
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// PubKeyToID returns the ID corresponding to the given PubKey.
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// It's the hex-encoding of the pubKey.Address().
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func PubKeyToID(pubKey crypto.PubKey) ID {
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return ID(hex.EncodeToString(pubKey.Address()))
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}
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// LoadOrGenNodeKey attempts to load the NodeKey from the given filePath. If
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// the file does not exist, it generates and saves a new NodeKey.
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func LoadOrGenNodeKey(filePath string) (*NodeKey, error) {
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if tmos.FileExists(filePath) {
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nodeKey, err := LoadNodeKey(filePath)
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if err != nil {
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return nil, err
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}
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return nodeKey, nil
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}
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privKey := ed25519.GenPrivKey()
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nodeKey := &NodeKey{
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PrivKey: privKey,
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}
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if err := nodeKey.SaveAs(filePath); err != nil {
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return nil, err
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}
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return nodeKey, nil
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}
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// LoadNodeKey loads NodeKey located in filePath.
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func LoadNodeKey(filePath string) (*NodeKey, error) {
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jsonBytes, err := ioutil.ReadFile(filePath)
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if err != nil {
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return nil, err
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}
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nodeKey := new(NodeKey)
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err = tmjson.Unmarshal(jsonBytes, nodeKey)
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if err != nil {
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return nil, err
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}
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return nodeKey, nil
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}
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// SaveAs persists the NodeKey to filePath.
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func (nodeKey *NodeKey) SaveAs(filePath string) error {
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jsonBytes, err := tmjson.Marshal(nodeKey)
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if err != nil {
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return err
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}
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err = ioutil.WriteFile(filePath, jsonBytes, 0600)
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if err != nil {
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return err
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}
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return nil
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}
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