Add API to generate keys

src/lib/waku_message/index.spec.ts

@@ -13,7 +13,7 @@ import { delay } from '../delay';
 import { hexToBuf } from '../utils';
 import { Waku } from '../waku';
 
-import { getPublicKey } from './version_1';
+import { generatePrivateKey, getPublicKey } from './version_1';
 
 import { DefaultContentTopic, WakuMessage } from './index';
 
@@ -129,9 +129,7 @@ describe('Interop: Nim', function () {
       payload: Buffer.from(messageText, 'utf-8').toString('hex'),
     };
 
-    const keyPair = await nimWaku.getAsymmetricKeyPair();
-    const privateKey = hexToBuf(keyPair.privateKey);
-    const publicKey = hexToBuf(keyPair.publicKey);
+    const privateKey = generatePrivateKey();
 
     waku.relay.addDecryptionPrivateKey(privateKey);
 
@@ -139,6 +137,7 @@ describe('Interop: Nim', function () {
       waku.relay.addObserver(resolve);
     });
 
+    const publicKey = getPublicKey(privateKey);
     dbg('Post message');
     await nimWaku.postAsymmetricMessage(message, publicKey);
 

src/lib/waku_message/version_1.ts

@@ -1,5 +1,6 @@
 import { Buffer } from 'buffer';
 import { randomBytes } from 'crypto';
+import * as crypto from 'crypto';
 
 import ecies from 'ecies-parity';
 import { keccak256 } from 'js-sha3';
@@ -122,6 +123,13 @@ export async function decryptAsymmetric(
   return ecies.decrypt(Buffer.from(privKey), Buffer.from(payload));
 }
 
+/**
+ * Generate a new private key
+ */
+export function generatePrivateKey(): Uint8Array {
+  return crypto.randomBytes(32);
+}
+
 /**
  * Return the public key for the given private key
  */

src/types/ecies-parity.d.ts

@@ -1,9 +1,6 @@
 // TypeScript Version: 2.1
 /// <reference types="node" />
 declare module 'ecies-parity' {
-  // Generate a new valid private key. Will use crypto.randomBytes as source.
-  export function generatePrivate(): Buffer;
-
   // Compute the public key for a given private key.
   export function getPublic(privateKey: Buffer): Buffer;