feat: implement secure browser notifications system
- Added SecureNotificationManager with cross-browser support (Chrome, Firefox, Safari, Edge) - Integrated WebRTC message notifications with tab visibility detection - Implemented XSS protection, URL validation, and rate limiting - Notifications shown only when chat tab is inactive - Enforced HTTPS and user gesture requirements
This commit is contained in:
lockbitchat
@@ -0,0 +1,606 @@
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/**
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* Secure and Reliable Notification Manager for P2P WebRTC Chat
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* Follows best practices: OWASP, MDN, Chrome DevRel
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*
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* @version 1.0.0
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* @author SecureBit Team
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* @license MIT
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*/
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class SecureChatNotificationManager {
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constructor(config = {}) {
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this.permission = Notification.permission;
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this.isTabActive = this.checkTabActive(); // Initialize with proper check
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this.unreadCount = 0;
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this.originalTitle = document.title;
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this.notificationQueue = [];
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this.maxQueueSize = config.maxQueueSize || 5;
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this.rateLimitMs = config.rateLimitMs || 2000; // Spam protection
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this.lastNotificationTime = 0;
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this.trustedOrigins = config.trustedOrigins || [];
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// Secure context flag
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this.isSecureContext = window.isSecureContext;
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// Cross-browser compatibility for Page Visibility API
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this.hidden = this.getHiddenProperty();
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this.visibilityChange = this.getVisibilityChangeEvent();
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this.initVisibilityTracking();
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this.initSecurityChecks();
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}
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/**
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* Initialize security checks and validation
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* @private
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*/
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initSecurityChecks() {
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// Security checks are performed silently
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}
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/**
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* Get hidden property name for cross-browser compatibility
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* @returns {string} Hidden property name
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* @private
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*/
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getHiddenProperty() {
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if (typeof document.hidden !== "undefined") {
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return "hidden";
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} else if (typeof document.msHidden !== "undefined") {
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return "msHidden";
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} else if (typeof document.webkitHidden !== "undefined") {
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return "webkitHidden";
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}
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return "hidden"; // fallback
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}
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/**
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* Get visibility change event name for cross-browser compatibility
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* @returns {string} Visibility change event name
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* @private
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*/
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getVisibilityChangeEvent() {
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if (typeof document.hidden !== "undefined") {
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return "visibilitychange";
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} else if (typeof document.msHidden !== "undefined") {
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return "msvisibilitychange";
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} else if (typeof document.webkitHidden !== "undefined") {
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return "webkitvisibilitychange";
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}
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return "visibilitychange"; // fallback
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}
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/**
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* Check if tab is currently active using multiple methods
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* @returns {boolean} True if tab is active
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* @private
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*/
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checkTabActive() {
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// Primary method: Page Visibility API
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if (this.hidden && typeof document[this.hidden] !== "undefined") {
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return !document[this.hidden];
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}
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// Fallback method: document.hasFocus()
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if (typeof document.hasFocus === "function") {
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return document.hasFocus();
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}
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// Ultimate fallback: assume active
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return true;
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}
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/**
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* Initialize page visibility tracking (Page Visibility API)
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* @private
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*/
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initVisibilityTracking() {
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// Primary method: Page Visibility API with cross-browser support
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if (typeof document.addEventListener !== "undefined" && typeof document[this.hidden] !== "undefined") {
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document.addEventListener(this.visibilityChange, () => {
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this.isTabActive = this.checkTabActive();
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if (this.isTabActive) {
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this.resetUnreadCount();
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this.clearNotificationQueue();
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}
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});
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}
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// Fallback method: Window focus/blur events
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window.addEventListener('focus', () => {
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this.isTabActive = this.checkTabActive();
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if (this.isTabActive) {
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this.resetUnreadCount();
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}
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});
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window.addEventListener('blur', () => {
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this.isTabActive = this.checkTabActive();
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});
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// Page unload cleanup
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window.addEventListener('beforeunload', () => {
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this.clearNotificationQueue();
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});
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}
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/**
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* Request notification permission (BEST PRACTICE: Only call in response to user action)
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* Never call on page load!
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* @returns {Promise<boolean>} Permission granted status
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*/
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async requestPermission() {
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// Secure context check
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if (!this.isSecureContext || !('Notification' in window)) {
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return false;
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}
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if (this.permission === 'granted') {
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return true;
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}
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if (this.permission === 'denied') {
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return false;
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}
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try {
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this.permission = await Notification.requestPermission();
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return this.permission === 'granted';
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} catch (error) {
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return false;
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}
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}
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/**
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* Update page title with unread count
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* @private
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*/
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updateTitle() {
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if (this.unreadCount > 0) {
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document.title = `(${this.unreadCount}) ${this.originalTitle}`;
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} else {
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document.title = this.originalTitle;
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}
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}
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/**
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* XSS Protection: Sanitize input text
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* @param {string} text - Text to sanitize
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* @returns {string} Sanitized text
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* @private
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*/
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sanitizeText(text) {
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if (typeof text !== 'string') {
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return '';
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}
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// Remove HTML tags and potentially dangerous characters
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const div = document.createElement('div');
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div.textContent = text;
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return div.innerHTML
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''')
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.substring(0, 500); // Length limit
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}
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/**
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* Validate icon URL (XSS protection)
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* @param {string} url - URL to validate
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* @returns {string|null} Validated URL or null
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* @private
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*/
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validateIconUrl(url) {
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if (!url) return null;
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try {
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const parsedUrl = new URL(url, window.location.origin);
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// Only allow HTTPS and data URLs
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if (parsedUrl.protocol === 'https:' || parsedUrl.protocol === 'data:') {
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// Check trusted origins if specified
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if (this.trustedOrigins.length > 0) {
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const isTrusted = this.trustedOrigins.some(origin =>
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parsedUrl.origin === origin
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);
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return isTrusted ? parsedUrl.href : null;
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}
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return parsedUrl.href;
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}
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return null;
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} catch (error) {
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return null;
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}
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}
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/**
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* Rate limiting for spam protection
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* @returns {boolean} Rate limit check passed
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* @private
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*/
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checkRateLimit() {
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const now = Date.now();
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if (now - this.lastNotificationTime < this.rateLimitMs) {
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return false;
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}
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this.lastNotificationTime = now;
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return true;
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}
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/**
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* Send secure notification
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* @param {string} senderName - Name of message sender
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* @param {string} message - Message content
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* @param {Object} options - Notification options
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* @returns {Notification|null} Created notification or null
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*/
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notify(senderName, message, options = {}) {
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// Update tab active state before checking
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this.isTabActive = this.checkTabActive();
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// Only show if tab is NOT active (user is on another tab or minimized)
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if (this.isTabActive) {
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return null;
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}
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// Permission check
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if (this.permission !== 'granted') {
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return null;
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}
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// Rate limiting
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if (!this.checkRateLimit()) {
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return null;
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}
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// Data sanitization (XSS Protection)
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const safeSenderName = this.sanitizeText(senderName || 'Unknown');
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const safeMessage = this.sanitizeText(message || '');
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const safeIcon = this.validateIconUrl(options.icon) || '/logo/icon-192x192.png';
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// Queue overflow protection
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if (this.notificationQueue.length >= this.maxQueueSize) {
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this.clearNotificationQueue();
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}
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try {
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const notification = new Notification(
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`${safeSenderName}`,
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{
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body: safeMessage.substring(0, 200), // Length limit
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icon: safeIcon,
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badge: safeIcon,
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tag: `chat-${options.senderId || 'unknown'}`, // Grouping
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requireInteraction: false, // Don't block user
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silent: options.silent || false,
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// Vibrate only for mobile and if supported
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vibrate: navigator.vibrate ? [200, 100, 200] : undefined,
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// Safe metadata
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data: {
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senderId: this.sanitizeText(options.senderId),
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timestamp: Date.now(),
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// Don't include sensitive data!
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}
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}
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);
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// Increment counter
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this.unreadCount++;
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this.updateTitle();
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// Add to queue for management
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this.notificationQueue.push(notification);
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// Safe click handler
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notification.onclick = (event) => {
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event.preventDefault(); // Prevent default behavior
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window.focus();
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notification.close();
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// Safe callback
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if (typeof options.onClick === 'function') {
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try {
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options.onClick(options.senderId);
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} catch (error) {
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console.error('[Notifications] Error in onClick handler:', error);
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}
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}
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};
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// Error handler
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notification.onerror = (event) => {
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console.error('[Notifications] Error showing notification:', event);
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};
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// Auto-close after reasonable time
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const autoCloseTimeout = Math.min(options.autoClose || 5000, 10000);
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setTimeout(() => {
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notification.close();
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this.removeFromQueue(notification);
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}, autoCloseTimeout);
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return notification;
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} catch (error) {
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console.error('[Notifications] Failed to create notification:', error);
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return null;
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}
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}
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/**
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* Remove notification from queue
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* @param {Notification} notification - Notification to remove
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* @private
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*/
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removeFromQueue(notification) {
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const index = this.notificationQueue.indexOf(notification);
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if (index > -1) {
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this.notificationQueue.splice(index, 1);
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}
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}
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/**
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* Clear all notifications
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*/
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clearNotificationQueue() {
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this.notificationQueue.forEach(notification => {
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try {
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notification.close();
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} catch (error) {
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// Ignore errors when closing
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}
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});
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this.notificationQueue = [];
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}
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/**
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* Reset unread counter
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*/
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resetUnreadCount() {
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this.unreadCount = 0;
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this.updateTitle();
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}
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/**
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* Get current status
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* @returns {Object} Current notification status
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*/
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getStatus() {
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return {
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permission: this.permission,
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isTabActive: this.isTabActive,
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unreadCount: this.unreadCount,
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isSecureContext: this.isSecureContext,
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queueSize: this.notificationQueue.length
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};
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}
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}
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/**
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* Secure integration with WebRTC
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*/
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class SecureP2PChat {
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constructor() {
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this.notificationManager = new SecureChatNotificationManager({
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maxQueueSize: 5,
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rateLimitMs: 2000,
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trustedOrigins: [
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window.location.origin,
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// Add other trusted origins for CDN icons
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]
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});
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this.dataChannel = null;
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this.peerConnection = null;
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this.remotePeerName = 'Peer';
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this.messageHistory = [];
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this.maxHistorySize = 100;
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}
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/**
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* Initialize when user connects
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*/
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async init() {
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// Initialize notification manager silently
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}
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/**
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* Method for manual permission request (called on click)
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* @returns {Promise<boolean>} Permission granted status
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*/
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async enableNotifications() {
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const granted = await this.notificationManager.requestPermission();
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return granted;
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}
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/**
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* Setup DataChannel with security checks
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* @param {RTCDataChannel} dataChannel - WebRTC data channel
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*/
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setupDataChannel(dataChannel) {
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if (!dataChannel) {
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console.error('[Chat] Invalid DataChannel');
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return;
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}
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this.dataChannel = dataChannel;
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// Setup handlers
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this.dataChannel.onmessage = (event) => {
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this.handleIncomingMessage(event.data);
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};
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this.dataChannel.onerror = (error) => {
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// Handle error silently
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};
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}
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/**
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* XSS Protection: Validate incoming messages
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* @param {string|Object} data - Message data
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* @returns {Object|null} Validated message or null
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* @private
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*/
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validateMessage(data) {
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try {
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const message = typeof data === 'string' ? JSON.parse(data) : data;
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// Check message structure
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if (!message || typeof message !== 'object') {
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throw new Error('Invalid message structure');
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}
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// Check required fields
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if (!message.text || typeof message.text !== 'string') {
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throw new Error('Invalid message text');
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}
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// Message length limit (DoS protection)
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if (message.text.length > 10000) {
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throw new Error('Message too long');
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}
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return {
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text: message.text,
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senderName: message.senderName || 'Unknown',
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senderId: message.senderId || 'unknown',
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timestamp: message.timestamp || Date.now(),
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senderAvatar: message.senderAvatar || null
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};
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} catch (error) {
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console.error('[Chat] Message validation failed:', error);
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return null;
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}
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}
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/**
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* Secure handling of incoming messages
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* @param {string|Object} data - Message data
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* @private
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*/
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handleIncomingMessage(data) {
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const message = this.validateMessage(data);
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if (!message) {
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return;
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}
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// Save to history (with limit)
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this.messageHistory.push(message);
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if (this.messageHistory.length > this.maxHistorySize) {
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this.messageHistory.shift();
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}
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// Display in UI (with sanitization)
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this.displayMessage(message);
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// Send notification only if tab is inactive
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this.notificationManager.notify(
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message.senderName,
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message.text,
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{
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icon: message.senderAvatar,
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senderId: message.senderId,
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onClick: (senderId) => {
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this.scrollToLatestMessage();
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}
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}
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);
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// Optional: sound (with check)
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if (!this.notificationManager.isTabActive) {
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this.playNotificationSound();
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}
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}
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/**
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* XSS Protection: Safe message display
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* @param {Object} message - Message to display
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* @private
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*/
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displayMessage(message) {
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const container = document.getElementById('messages');
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if (!container) {
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return;
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}
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const messageEl = document.createElement('div');
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messageEl.className = 'message';
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// Use textContent to prevent XSS
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const nameEl = document.createElement('strong');
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nameEl.textContent = message.senderName + ': ';
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const textEl = document.createElement('span');
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textEl.textContent = message.text;
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const timeEl = document.createElement('small');
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timeEl.textContent = new Date(message.timestamp).toLocaleTimeString();
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messageEl.appendChild(nameEl);
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messageEl.appendChild(textEl);
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messageEl.appendChild(document.createElement('br'));
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messageEl.appendChild(timeEl);
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container.appendChild(messageEl);
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this.scrollToLatestMessage();
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}
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/**
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* Safe sound playback
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* @private
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*/
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playNotificationSound() {
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try {
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// Use only local audio files
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const audio = new Audio('/assets/audio/notification.mp3');
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audio.volume = 0.3; // Moderate volume
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||||
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// Error handling
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audio.play().catch(error => {
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||||
// Handle audio error silently
|
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});
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||||
} catch (error) {
|
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// Handle audio creation error silently
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Scroll to latest message
|
||||
* @private
|
||||
*/
|
||||
scrollToLatestMessage() {
|
||||
const container = document.getElementById('messages');
|
||||
if (container) {
|
||||
container.scrollTop = container.scrollHeight;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get status
|
||||
* @returns {Object} Current chat status
|
||||
*/
|
||||
getStatus() {
|
||||
return {
|
||||
notifications: this.notificationManager.getStatus(),
|
||||
messageCount: this.messageHistory.length,
|
||||
connected: this.dataChannel?.readyState === 'open'
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
// Export for use in other modules
|
||||
if (typeof module !== 'undefined' && module.exports) {
|
||||
module.exports = { SecureChatNotificationManager, SecureP2PChat };
|
||||
}
|
||||
|
||||
// Global export for browser usage
|
||||
if (typeof window !== 'undefined') {
|
||||
window.SecureChatNotificationManager = SecureChatNotificationManager;
|
||||
window.SecureP2PChat = SecureP2PChat;
|
||||
}
|
||||
Reference in New Issue
Block a user