Refactor authentication flow

client/js/lounge.js

@@ -562,7 +562,7 @@ $(function() {
 	});
 
 	sidebar.on("click", "#sign-out", function() {
-		socket.emit("sign-out", storage.get("token"));
+		socket.emit("sign-out");
 		storage.remove("token");
 
 		if (!socket.connected) {

src/client.js

@@ -300,13 +300,13 @@ Client.prototype.updateSession = function(token, ip, request) {
 	const agent = UAParser(request.headers["user-agent"] || "");
 	let friendlyAgent = "";
 
-	if (agent.browser.name.length) {
+	if (agent.browser.name) {
 		friendlyAgent = `${agent.browser.name} ${agent.browser.major}`;
 	} else {
 		friendlyAgent = "Unknown browser";
 	}
 
-	if (agent.os.name.length) {
+	if (agent.os.name) {
 		friendlyAgent += ` on ${agent.os.name} ${agent.os.version}`;
 	}
 

src/server.js

@@ -100,9 +100,10 @@ in ${config.public ? "public" : "private"} mode`);
 
 	sockets.on("connect", function(socket) {
 		if (config.public) {
-			auth.call(socket, {});
+			performAuthentication.call(socket, {});
 		} else {
-			init(socket);
+			socket.emit("auth", {success: true});
+			socket.on("auth", performAuthentication);
 		}
 	});
 
@@ -173,15 +174,9 @@ function index(req, res, next) {
 	res.render("index", data);
 }
 
-function init(socket, client, generateToken) {
-	if (!client) {
-		socket.emit("auth", {success: true});
-		socket.on("auth", auth);
-	} else {
+function initializeClient(socket, client, generateToken, token) {
 	socket.emit("authorized");
 
-		client.ip = getClientIp(socket.request);
-
 	socket.on("disconnect", function() {
 		client.clientDetach(socket.id);
 	});
@@ -193,21 +188,25 @@ function init(socket, client, generateToken) {
 			client.input(data);
 		}
 	);
+
 	socket.on(
 		"more",
 		function(data) {
 			client.more(data);
 		}
 	);
+
 	socket.on(
 		"conn",
 		function(data) {
 			// prevent people from overriding webirc settings
 			data.ip = null;
 			data.hostname = null;
+
 			client.connect(data);
 		}
 	);
+
 	if (!Helper.config.public && !Helper.config.ldap.enable) {
 		socket.on(
 			"change-password",
@@ -256,18 +255,21 @@ function init(socket, client, generateToken) {
 			}
 		);
 	}
+
 	socket.on(
 		"open",
 		function(data) {
 			client.open(socket.id, data);
 		}
 	);
+
 	socket.on(
 		"sort",
 		function(data) {
 			client.sort(data);
 		}
 	);
+
 	socket.on(
 		"names",
 		function(data) {
@@ -294,7 +296,7 @@ function init(socket, client, generateToken) {
 		}
 	});
 
-		socket.on("sign-out", (token) => {
+	socket.on("sign-out", () => {
 		delete client.config.sessions[token];
 
 		client.manager.updateUser(client.name, {
@@ -310,16 +312,18 @@ function init(socket, client, generateToken) {
 
 	socket.join(client.id);
 
-		const sendInitEvent = (token) => {
+	const sendInitEvent = (tokenToSend) => {
 		socket.emit("init", {
 			active: client.lastActiveChannel,
 			networks: client.networks,
-				token: token
+			token: tokenToSend
 		});
 	};
 
 	if (generateToken) {
-			client.generateToken((token) => {
+		client.generateToken((newToken) => {
+			token = newToken;
+
 			client.updateSession(token, getClientIp(socket.request), socket.request);
 
 			client.manager.updateUser(client.name, {
@@ -336,21 +340,6 @@ function init(socket, client, generateToken) {
 		sendInitEvent(null);
 	}
 }
-}
-
-function reverseDnsLookup(socket, client) {
-	client.ip = getClientIp(socket.request);
-
-	dns.reverse(client.ip, function(err, host) {
-		if (!err && host.length) {
-			client.hostname = host[0];
-		} else {
-			client.hostname = client.ip;
-		}
-
-		init(socket, client);
-	});
-}
 
 function localAuth(client, user, password, callback) {
 	// If no user is found, or if the client has not provided a password,
@@ -408,18 +397,25 @@ function ldapAuth(client, user, password, callback) {
 	});
 }
 
-function auth(data) {
+function performAuthentication(data) {
 	const socket = this;
 	let client;
 
+	const finalInit = () => initializeClient(socket, client, !!data.remember, data.token || null);
+
 	const initClient = () => {
-		// If webirc is enabled and we do not know this users IP address,
-		// perform reverse dns lookup
-		if (Helper.config.webirc !== null && !client.config.ip) {
-			reverseDnsLookup(socket, client);
-		} else {
-			init(socket, client, data.remember === "on");
+		client.ip = getClientIp(socket.request);
+
+		// If webirc is enabled perform reverse dns lookup
+		if (Helper.config.webirc === null) {
+			return finalInit();
 		}
+
+		reverseDnsLookup(client.ip, (hostname) => {
+			client.hostname = hostname;
+
+			finalInit();
+		});
 	};
 
 	if (Helper.config.public) {
@@ -470,3 +466,13 @@ function auth(data) {
 		localAuth(client, data.user, data.password, authCallback);
 	}
 }
+
+function reverseDnsLookup(ip, callback) {
+	dns.reverse(ip, (err, hostnames) => {
+		if (!err && hostnames.length) {
+			return callback(hostnames[0]);
+		}
+
+		callback(ip);
+	});
+}