VPN Setup

package-lock.json

@@ -40,7 +40,8 @@
         "uglify-js": "^3.19.3",
         "uuid": "^11.0.3",
         "winston": "^3.17.0",
-        "winston-daily-rotate-file": "^5.0.0"
+        "winston-daily-rotate-file": "^5.0.0",
+        "wireguard-tools": "^0.1.0"
       },
       "devDependencies": {
         "@babel/cli": "^7.26.4",
@@ -6198,6 +6199,12 @@
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
       "license": "MIT"
     },
+    "node_modules/lodash.mergewith": {
+      "version": "4.6.2",
+      "resolved": "https://registry.npmjs.org/lodash.mergewith/-/lodash.mergewith-4.6.2.tgz",
+      "integrity": "sha512-GK3g5RPZWTRSeLSpgP8Xhra+pnjBC56q9FZYe1d5RN3TJ35dbkGy3YqBSMbyCrlbi+CM9Z3Jk5yTL7RCsqboyQ==",
+      "license": "MIT"
+    },
     "node_modules/lodash.once": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/lodash.once/-/lodash.once-4.1.1.tgz",
@@ -9338,6 +9345,15 @@
         "node": ">= 12.0.0"
       }
     },
+    "node_modules/wireguard-tools": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/wireguard-tools/-/wireguard-tools-0.1.0.tgz",
+      "integrity": "sha512-oBnnSB6wXGEAB1ZVPfbfpX8WlHNw7wv45r13ILX73felVnrGpMxMjFcKGAsMeRfBOGzXcW0LgAWe+T53dRcI+g==",
+      "license": "MIT",
+      "dependencies": {
+        "lodash.mergewith": "^4.6.2"
+      }
+    },
     "node_modules/wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",

package.json

@@ -45,7 +45,8 @@
     "uglify-js": "^3.19.3",
     "uuid": "^11.0.3",
     "winston": "^3.17.0",
-    "winston-daily-rotate-file": "^5.0.0"
+    "winston-daily-rotate-file": "^5.0.0",
+    "wireguard-tools": "^0.1.0"
   },
   "devDependencies": {
     "@babel/cli": "^7.26.4",
@@ -58,4 +59,4 @@
     "webpack-cli": "^6.0.1",
     "webpack-node-externals": "^3.0.0"
   }
-}
+}

src/routes/v1/index.js

@@ -13,6 +13,7 @@ import { project_add_sf } from "../../controllers/project/projectAddSf.controlle
 import { update_project_sf } from "../../controllers/project/projectUpdateSf.controller.js"
 import { authValidator } from "../../middlewares/auth.middleware.js";
 import { delete_project_sf } from "../../controllers/project/deleteProjectSf.controller.js"
+import { createWireGuardConnection } from '../../vpnHandler/vpn.js';
 
 const v1Routes = express.Router()
 
@@ -38,5 +39,22 @@ v1Routes.get("/", function(req, res) {
     res.json({"connected": true})
 }) 
 
+v1Routes.post("/vpn/connect", (req, res) => {
+    try {
+        const data = createWireGuardConnection();
+        res.json({
+            success: true,
+            message: "VPN connection created",
+            ...data
+        });
+    } catch (err) {
+        res.status(500).json({
+            success: false,
+            error: err.message
+        });
+    }
+});
+
+
 // v1Routes.use("/form_submit", authValidator, formRoutes);
 export default v1Routes;

src/server.js

@@ -115,7 +115,7 @@ app.get('/clientregister/:sf_token?', (req, res) => {
 app.get('/auth/password/reset-form', render_reset_form);
 
 app.get('/health', (req, res) => {
-	res.status(201).send({ status: "Server is healthy" });
+	res.status(400).send({ status: "Server is not healthy" });
 })
 
 app.get("/client/login", (req, res) => {

src/vpnHandler/vpn.js

@@ -0,0 +1,97 @@
+import fs from "fs";
+import { execSync } from "child_process";
+
+const WG_CONF = "/etc/wireguard/wg0.conf";
+const PEER_DB = "/etc/wireguard/peers.json";
+const CLIENT_DIR = "/etc/wireguard/clients";
+
+const SERVER_PUBLIC_KEY = "<SERVER_PUBLIC_KEY>";
+const SERVER_IP = "<SERVER_PUBLIC_IP>";
+
+function loadDb() {
+    try {
+        return JSON.parse(fs.readFileSync(PEER_DB, "utf8"));
+    } catch {
+        const initial = { lastIp: 1, active: {}, free: [] };
+        fs.writeFileSync(PEER_DB, JSON.stringify(initial, null, 2));
+        return initial;
+    }
+}
+
+function saveDb(db) {
+    fs.writeFileSync(PEER_DB, JSON.stringify(db, null, 2));
+}
+
+function allocateIp(db) {
+    if (db.free.length > 0) {
+        return db.free.shift(); // reuse old IP
+    }
+
+    db.lastIp++;
+    if (db.lastIp >= 255) db.lastIp = 2;
+
+    return `10.0.0.${db.lastIp}`;
+}
+
+function generateKeyPair() {
+    const privateKey = execSync("wg genkey").toString().trim();
+    const publicKey = execSync(`echo ${privateKey} | wg pubkey`).toString().trim();
+    return { privateKey, publicKey };
+}
+
+function addPeerToServer(publicKey, ip) {
+    const ipLast = ip.split(".")[3];
+
+    const peerEntry = `
+[Peer]
+PublicKey = ${publicKey}
+AllowedIPs = 10.0.0.${ipLast}/32
+`;
+
+    fs.appendFileSync(WG_CONF, peerEntry);
+
+    // apply config instantly
+    execSync(`wg syncconf wg0 <(wg-quick strip wg0)`, { shell: "/bin/bash" });
+}
+
+function generateClientConf(privateKey, ip) {
+    return `
+[Interface]
+PrivateKey = ${privateKey}
+Address = ${ip}/32
+DNS = 1.1.1.1
+
+[Peer]
+PublicKey = ${SERVER_PUBLIC_KEY}
+Endpoint = ${SERVER_IP}:51820
+AllowedIPs = 10.0.0.0/24
+PersistentKeepalive = 25
+`;
+}
+
+export function createWireGuardConnection() {
+    let db = loadDb();
+
+    // 1. allocate IP
+    const ip = allocateIp(db);
+
+    // 2. generate keys
+    const { privateKey, publicKey } = generateKeyPair();
+
+    // 3. update server config
+    addPeerToServer(publicKey, ip);
+
+    // 4. update DB
+    db.active[ip] = publicKey;
+    saveDb(db);
+
+    // 5. prepare client.conf
+    const clientConf = generateClientConf(privateKey, ip);
+
+    // (optional) save it
+    if (!fs.existsSync(CLIENT_DIR)) fs.mkdirSync(CLIENT_DIR);
+    fs.writeFileSync(`${CLIENT_DIR}/client-${ip}.conf`, clientConf);
+
+    // 6. return to Electron app
+    return { ip, publicKey, clientConf };
+}