fix!: load self key into keychain on startup if not present (#1357)

To prevent triggering keychain attack prevention on startup, refactor the `KeyChain` class to load the current PeerId as the `'self'` key on startup.

Fixes #1315

BREAKING CHANGE: the `loadKeychain` method has been removed as it is no longer necessary

doc/API.md

@@ -185,36 +185,6 @@ Required keys in the `options` object:
 
 ## Libp2p Instance Methods
 
-### loadKeychain
-
-Load keychain keys from the datastore, importing the private key as 'self', if needed.
-
-`libp2p.loadKeychain()`
-
-#### Returns
-
-| Type | Description |
-|------|-------------|
-| `Promise` | Promise resolves when the keychain is ready |
-
-#### Example
-
-```js
-import { createLibp2p } from 'libp2p'
-
-// ...
-
-const libp2p = await createLibp2p({
-  // ...
-  keychain: {
-    pass: '0123456789pass1234567890'
-  }
-})
-
-// load keychain
-await libp2p.loadKeychain()
-```
-
 ### start
 
 Starts the libp2p node.

doc/CONFIGURATION.md

@@ -494,8 +494,6 @@ const node = await createLibp2p({
     datastore: dsInstant,
   }
 })
-
-await node.loadKeychain()
 ```
 
 #### Configuring Dialing

src/index.ts

@@ -140,12 +140,6 @@ export interface Libp2p extends Startable, EventEmitter<Libp2pEvents> {
   pubsub: PubSub
   dht: DualDHT
 
-  /**
-   * Load keychain keys from the datastore.
-   * Imports the private key as 'self', if needed.
-   */
-  loadKeychain: () => Promise<void>
-
   /**
    * Get a deduplicated list of peer advertising multiaddrs by concatenating
    * the listen addresses used by transports with any configured

src/keychain/index.ts

@@ -13,6 +13,7 @@ import { generateKeyPair, importKey, unmarshalPrivateKey } from '@libp2p/crypto/
 import type { PeerId } from '@libp2p/interface-peer-id'
 import type { Components } from '@libp2p/components'
 import { pbkdf2, randomBytes } from '@libp2p/crypto'
+import type { Startable } from '@libp2p/interfaces/dist/src/startable'
 
 const log = logger('libp2p:keychain')
 
@@ -110,9 +111,10 @@ function DsInfoName (name: string) {
  * - '/pkcs8/*key-name*', contains the PKCS #8 for the key
  *
  */
-export class KeyChain {
+export class KeyChain implements Startable {
   private readonly components: Components
   private init: KeyChainInit
+  private started: boolean
 
   /**
    * Creates a new instance of a key chain
@@ -145,6 +147,25 @@ export class KeyChain {
       : ''
 
     privates.set(this, { dek })
+    this.started = false
+  }
+
+  isStarted () {
+    return this.started
+  }
+
+  async start () {
+    const dsname = DsInfoName('self')
+
+    if (!(await this.components.getDatastore().has(dsname))) {
+      await this.importPeer('self', this.components.getPeerId())
+    }
+
+    this.started = true
+  }
+
+  stop () {
+    this.started = false
   }
 
   /**
@@ -474,8 +495,11 @@ export class KeyChain {
       if (!validateKeyName(name)) {
         throw errCode(new Error(`Invalid key name '${name}'`), codes.ERR_INVALID_KEY_NAME)
       }
-      if (peer == null || peer.privateKey == null) {
-        throw errCode(new Error('Peer.privKey is required'), codes.ERR_MISSING_PRIVATE_KEY)
+      if (peer == null) {
+        throw errCode(new Error('PeerId is required'), codes.ERR_MISSING_PRIVATE_KEY)
+      }
+      if (peer.privateKey == null) {
+        throw errCode(new Error('PeerId.privKey is required'), codes.ERR_MISSING_PRIVATE_KEY)
       }
 
       const privateKey = await unmarshalPrivateKey(peer.privateKey)

src/libp2p.ts

@@ -352,22 +352,6 @@ export class Libp2pNode extends EventEmitter<Libp2pEvents> implements Libp2p {
     log('libp2p has stopped')
   }
 
-  /**
-   * Load keychain keys from the datastore.
-   * Imports the private key as 'self', if needed.
-   */
-  async loadKeychain () {
-    if (this.keychain == null) {
-      return
-    }
-
-    try {
-      await this.keychain.findKeyByName('self')
-    } catch (err: any) {
-      await this.keychain.importPeer('self', this.peerId)
-    }
-  }
-
   isStarted () {
     return this.started
   }

test/configuration/utils.ts

@@ -9,12 +9,10 @@ import type { Message, PublishResult, PubSubInit, PubSubRPC, PubSubRPCMessage }
 import type { Libp2pInit, Libp2pOptions } from '../../src/index.js'
 import type { PeerId } from '@libp2p/interface-peer-id'
 import * as cborg from 'cborg'
-import { peerIdFromString } from '@libp2p/peer-id'
 
 const relayAddr = MULTIADDRS_WEBSOCKETS[0]
 
 export const baseOptions: Partial<Libp2pInit> = {
-  peerId: peerIdFromString('12D3KooWJKCJW8Y26pRFNv78TCMGLNTfyN8oKaFswMRYXTzSbSst'),
   transports: [new WebSockets()],
   streamMuxers: [new Mplex()],
   connectionEncryption: [new Plaintext()]

test/keychain/keychain.spec.ts

@@ -512,8 +512,6 @@ describe('libp2p.keychain', () => {
       }
     })
 
-    await libp2p.loadKeychain()
-
     const kInfo = await libp2p.keychain.createKey('keyName', 'Ed25519')
     expect(kInfo).to.exist()
   })
@@ -526,8 +524,6 @@ describe('libp2p.keychain', () => {
       }
     })
 
-    await libp2p.loadKeychain()
-
     const kInfo = await libp2p.keychain.createKey('keyName', 'Ed25519')
     expect(kInfo).to.exist()
   })
@@ -543,7 +539,6 @@ describe('libp2p.keychain', () => {
         }
       }
     })
-    await libp2p.loadKeychain()
 
     const kInfo = await libp2p.keychain.createKey('keyName', 'Ed25519')
     expect(kInfo).to.exist()
@@ -558,7 +553,6 @@ describe('libp2p.keychain', () => {
       }
     })
 
-    await libp2p2.loadKeychain()
     const key = await libp2p2.keychain.findKeyByName('keyName')
 
     expect(key).to.exist()