Debugged encrypt before sending notification

Dockerfile

@@ -3,6 +3,8 @@ FROM node:18.17.1-alpine3.17
 RUN mkdir -p /usr/src/app/data
 WORKDIR /usr/src/app
 
+RUN apk add bash
+
 COPY package*.json ./
 COPY tsconfig.json ./
 COPY .eslintrc.json ./

src/main.ts

@@ -14,7 +14,7 @@ import { dirname, join } from 'path';
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
-export interface Subscription {
+export interface BrowserSubscription {
   endpoint: string;
   keys: {
     p256dh: string;
@@ -27,15 +27,13 @@ class Server {
   private port: number;
   private worker?: Worker;
   private subscriptionService: SubscriptionService = SubscriptionService.getInstance();
-  private notificationService: NotificationService;
+  private notificationService: NotificationService = NotificationService.getInstance();
    dbService: DBService = DBService.getInstance();
    vapidService: VapidService = VapidService.getInstance();
-  private message: Message;
 
   constructor(port: number) {
     this.app = express();
     this.port = port;
-    this.notificationService = new NotificationService();
 
     this.setupRoutes();
     this.startWorker();
@@ -46,21 +44,23 @@ class Server {
   private setupRoutes(): void {
     this.app.use(express.json())
     this.app.post('/web-push/subscribe', async (req: Request, res: Response) => {
-      const subscription = req.body as Subscription;
+      const subscription = req.body as BrowserSubscription;
+      const message = { "title": "You are subscribed." } as Message;
       console.log("/web-push/subscribe", req.body);
       await this.subscriptionService.addSubscription(subscription);
+      await this.notificationService.sendNotification(subscription, message);
       res.status(201).send();
     });
     
     this.app.post('/web-push/unsubscribe', async (req: Request, res: Response) => {
-      const subscription = req.body as Subscription;
+      const subscription = req.body as BrowserSubscription;
       console.log(subscription);
 
       res.status(501).send();
     });
 
     this.app.post('/web-push/mute', async (req: Request, res: Response) => {
-      const subscription = req.body as Subscription;
+      const subscription = req.body as BrowserSubscription;
       console.log(subscription);
 
       res.status(501).send();
@@ -88,8 +88,7 @@ class Server {
 
     this.worker.on('message', (message) => {
       console.log(message);
-      this.message = { "title": "Check TimeSafari"} as Message;
-      this.notificationService.broadcast(this.message);
+
     });
 
     this.worker.on('error', (error) => {
@@ -137,6 +136,7 @@ const executeAsyncFunction = async () => {
   }
 };
 
+
 setTimeout(() => {
   executeAsyncFunction().catch(error => {
     // Handle any errors here

src/notificationService.ts

@@ -1,10 +1,10 @@
-import SubscriptionService from './subscriptionService.js';
+//import SubscriptionService from './subscriptionService.js';
 import VapidService from './vapidService.js';
 import { VapidKeys } from './VapidKeys.js';
 import * as https from 'https';
 import * as http_ece from 'http_ece';
 import crypto from 'crypto';
-import { Subscription } from "./Subscription.js"
+//import { Subscription } from "./Subscription.js"
 
 export interface Message {
     title: string;
@@ -12,34 +12,44 @@ export interface Message {
     [key: string]: any;
 }
 
-export class NotificationService {
 
-    private subscriptionService: SubscriptionService = SubscriptionService.getInstance();
+export interface BrowserSubscription {
+  endpoint: string;
+  keys: {
+    p256dh: string;
+    auth: string;
+  };
+}
+
+
+export class NotificationService {
+    private static instance: NotificationService;
+//    private subscriptionService: SubscriptionService = SubscriptionService.getInstance();
     private vapidService: VapidService = VapidService.getInstance();
 
     constructor() {
     }
     
-    private generateSalt(length = 16): Buffer {
-        return crypto.randomBytes(length);
+    public static getInstance(): NotificationService {
+      if (!NotificationService.instance) {
+        NotificationService.instance = new NotificationService();
       }
-      
-    async broadcast(message: Message): Promise<void> {
-        const subscriptions = await this.subscriptionService.fetchSubscriptions();
-
-        for (const subscription of subscriptions) {
-            await this.pushToEndpoint(subscription, message);
+      return NotificationService.instance;
     }
+
+    private generateSalt(length = 16): Buffer {
+        return crypto.randomBytes(length);
     }
       
-    async sendNotification(subscription: Subscription, message: Message) {
+    async sendNotification(subscription: BrowserSubscription, message: Message) {
         await this.pushToEndpoint(subscription, message);
     }
 
-    private async pushToEndpoint(subscription: Subscription, message: Message): Promise<void> {
-        const payload = JSON.stringify(message);
+    private async pushToEndpoint(subscription: BrowserSubscription, message: Message): Promise<void> {
+        const payloadString = JSON.stringify(message);
+	const payloadBuffer = Buffer.from(payloadString, 'utf-8');
 
-        const encrypted = this.encrypt(subscription.keys_p256dh, subscription.keys_auth, payload);
+        const encrypted = await this.encrypt(subscription.keys.p256dh, subscription.keys.auth, payloadBuffer);
         const endpoint = subscription.endpoint;
 
         const vapidHeaders = await this.vapidService.createVapidAuthHeader(endpoint, 12 * 60 * 60, 'mailto:example@example.com');
@@ -77,18 +87,32 @@ export class NotificationService {
         });
     }
 
-    private encrypt(publicKey: string, auth: string, payload: string): Buffer {
-        http_ece.keys = {
-            'p256dh': publicKey,
-            'auth': auth
-        };
 
-        const vapidKeys: VapidKeys = this.vapidService.getVapidKeys()[0];
+    private async encrypt(publicKey: string, auth: string, payload: Buffer): Promise<Buffer> {
+      try {
+        console.log('Public Key:', publicKey);
+        console.log('Auth:', auth);
+
+        const vapidKeys: VapidKeys[] = await this.vapidService.getVapidKeys();
+	const vapidkey: VapidKeys = vapidKeys[0];
+	const vapidPrivateKeyBase64: string = vapidkey['privateKey'];
+	console.log(vapidPrivateKeyBase64);
+        const vapidPrivateKeyBuffer: Buffer = Buffer.from(vapidPrivateKeyBase64, 'base64');
+        const ecdh = crypto.createECDH('prime256v1');
+        ecdh.setPrivateKey(vapidPrivateKeyBuffer);
+	const publicKeyBuffer: Buffer = Buffer.from(publicKey, 'base64');
+//	const authBuffer: Buffer = Buffer.from(auth, 'base64');
+	
         return http_ece.encrypt(payload, {
             'salt': this.generateSalt(),
-            'dh': vapidKeys.publicKey,
-            'keyid': 'p256dh',
-            'contentEncoding': 'aes128gcm'
+            'privateKey': ecdh,                    // Your VAPID private key
+            'publicKey': publicKeyBuffer,          // Client's public key from the subscription object subscription.keys.p256dh
+            'authSecret': auth                    // Client's auth secret from the subscription object subscription.keys.auth
         });
+      } catch (error) {
+        console.error('Error encrypting payload:', error);
+        // Handle the error as appropriate for your application
+        throw error;
+      }
     }    
 }

src/vapidService.ts

@@ -66,6 +66,7 @@ class VapidService {
 */
 
   async getVapidKeys(): Promise<VapidKeys[]> {
+    console.log("getVapidKeys");
     let result = await this.dbService.getVapidKeys();
     return result;
   }