@push.rocks/smartproxy
Version:
A powerful proxy package with unified route-based configuration for high traffic management. Features include SSL/TLS support, flexible routing patterns, WebSocket handling, advanced security options, and automatic ACME certificate management.
297 lines • 21.2 kB
JavaScript
import * as plugins from '../../plugins.js';
import { isIPAuthorized, checkMaxConnections, checkConnectionRate, trackConnection, removeConnection, cleanupExpiredRateLimits, parseBasicAuthHeader, normalizeIP } from './security-utils.js';
/**
* Shared SecurityManager for use across proxy components
* Handles IP tracking, rate limiting, and authentication
*/
export class SharedSecurityManager {
/**
* Create a new SharedSecurityManager
*
* @param options - Configuration options
* @param logger - Logger instance
*/
constructor(options, logger) {
this.logger = logger;
// IP connection tracking
this.connectionsByIP = new Map();
// Route-specific rate limiting
this.rateLimits = new Map();
// Cache IP filtering results to avoid constant regex matching
this.ipFilterCache = new Map();
// Cache cleanup interval
this.cleanupInterval = null;
this.maxConnectionsPerIP = options.maxConnectionsPerIP || 100;
this.connectionRateLimitPerMinute = options.connectionRateLimitPerMinute || 300;
// Set up logger with defaults if not provided
this.logger = logger || {
info: console.log,
warn: console.warn,
error: console.error
};
// Set up cache cleanup interval
const cleanupInterval = options.cleanupIntervalMs || 60000; // Default: 1 minute
this.cleanupInterval = setInterval(() => {
this.cleanupCaches();
}, cleanupInterval);
// Don't keep the process alive just for cleanup
if (this.cleanupInterval.unref) {
this.cleanupInterval.unref();
}
}
/**
* Get connections count by IP
*
* @param ip - The IP address to check
* @returns Number of connections from this IP
*/
getConnectionCountByIP(ip) {
// Check all normalized variants of the IP
const variants = normalizeIP(ip);
for (const variant of variants) {
const info = this.connectionsByIP.get(variant);
if (info) {
return info.connections.size;
}
}
return 0;
}
/**
* Track connection by IP
*
* @param ip - The IP address to track
* @param connectionId - The connection ID to associate
*/
trackConnectionByIP(ip, connectionId) {
// Check if any variant already exists
const variants = normalizeIP(ip);
let existingKey = null;
for (const variant of variants) {
if (this.connectionsByIP.has(variant)) {
existingKey = variant;
break;
}
}
// Use existing key or the original IP
trackConnection(existingKey || ip, connectionId, this.connectionsByIP);
}
/**
* Remove connection tracking for an IP
*
* @param ip - The IP address to update
* @param connectionId - The connection ID to remove
*/
removeConnectionByIP(ip, connectionId) {
// Check all variants to find where the connection is tracked
const variants = normalizeIP(ip);
for (const variant of variants) {
if (this.connectionsByIP.has(variant)) {
removeConnection(variant, connectionId, this.connectionsByIP);
break;
}
}
}
/**
* Check if IP is authorized based on route security settings
*
* @param ip - The IP address to check
* @param allowedIPs - List of allowed IP patterns
* @param blockedIPs - List of blocked IP patterns
* @returns Whether the IP is authorized
*/
isIPAuthorized(ip, allowedIPs = ['*'], blockedIPs = []) {
return isIPAuthorized(ip, allowedIPs, blockedIPs);
}
/**
* Validate IP against rate limits and connection limits
*
* @param ip - The IP address to validate
* @returns Result with allowed status and reason if blocked
*/
validateIP(ip) {
// Check connection count limit
const connectionResult = checkMaxConnections(ip, this.connectionsByIP, this.maxConnectionsPerIP);
if (!connectionResult.allowed) {
return connectionResult;
}
// Check connection rate limit
const rateResult = checkConnectionRate(ip, this.connectionsByIP, this.connectionRateLimitPerMinute);
if (!rateResult.allowed) {
return rateResult;
}
return { allowed: true };
}
/**
* Check if a client is allowed to access a specific route
*
* @param route - The route to check
* @param context - The request context
* @param routeConnectionCount - Current connection count for this route (optional)
* @returns Whether access is allowed
*/
isAllowed(route, context, routeConnectionCount) {
if (!route.security) {
return true; // No security restrictions
}
// --- IP filtering ---
if (!this.isClientIpAllowed(route, context.clientIp)) {
this.logger?.debug?.(`IP ${context.clientIp} is blocked for route ${route.name || 'unnamed'}`);
return false;
}
// --- Route-level connection limit ---
if (route.security.maxConnections !== undefined && routeConnectionCount !== undefined) {
if (routeConnectionCount >= route.security.maxConnections) {
this.logger?.debug?.(`Route connection limit (${route.security.maxConnections}) exceeded for route ${route.name || 'unnamed'}`);
return false;
}
}
// --- Rate limiting ---
if (route.security.rateLimit?.enabled && !this.isWithinRateLimit(route, context)) {
this.logger?.debug?.(`Rate limit exceeded for route ${route.name || 'unnamed'}`);
return false;
}
return true;
}
/**
* Check if a client IP is allowed for a route
*
* @param route - The route to check
* @param clientIp - The client IP
* @returns Whether the IP is allowed
*/
isClientIpAllowed(route, clientIp) {
if (!route.security) {
return true; // No security restrictions
}
const routeId = route.id || route.name || 'unnamed';
// Check cache first
if (!this.ipFilterCache.has(routeId)) {
this.ipFilterCache.set(routeId, new Map());
}
const routeCache = this.ipFilterCache.get(routeId);
if (routeCache.has(clientIp)) {
return routeCache.get(clientIp);
}
// Check IP against route security settings
const ipAllowList = route.security.ipAllowList;
const ipBlockList = route.security.ipBlockList;
const allowed = this.isIPAuthorized(clientIp, ipAllowList, ipBlockList);
// Cache the result
routeCache.set(clientIp, allowed);
return allowed;
}
/**
* Check if request is within rate limit
*
* @param route - The route to check
* @param context - The request context
* @returns Whether the request is within rate limit
*/
isWithinRateLimit(route, context) {
if (!route.security?.rateLimit?.enabled) {
return true;
}
const rateLimit = route.security.rateLimit;
const routeId = route.id || route.name || 'unnamed';
// Determine rate limit key (by IP, path, or header)
let key = context.clientIp; // Default to IP
if (rateLimit.keyBy === 'path' && context.path) {
key = `${context.clientIp}:${context.path}`;
}
else if (rateLimit.keyBy === 'header' && rateLimit.headerName && context.headers) {
const headerValue = context.headers[rateLimit.headerName.toLowerCase()];
if (headerValue) {
key = `${context.clientIp}:${headerValue}`;
}
}
// Get or create rate limit tracking for this route
if (!this.rateLimits.has(routeId)) {
this.rateLimits.set(routeId, new Map());
}
const routeLimits = this.rateLimits.get(routeId);
const now = Date.now();
// Get or create rate limit tracking for this key
let limit = routeLimits.get(key);
if (!limit || limit.expiry < now) {
// Create new rate limit or reset expired one
limit = {
count: 1,
expiry: now + (rateLimit.window * 1000)
};
routeLimits.set(key, limit);
return true;
}
// Increment the counter
limit.count++;
// Check if rate limit is exceeded
return limit.count <= rateLimit.maxRequests;
}
/**
* Validate HTTP Basic Authentication
*
* @param route - The route to check
* @param authHeader - The Authorization header
* @returns Whether authentication is valid
*/
validateBasicAuth(route, authHeader) {
// Skip if basic auth not enabled for route
if (!route.security?.basicAuth?.enabled) {
return true;
}
// No auth header means auth failed
if (!authHeader) {
return false;
}
// Parse auth header
const credentials = parseBasicAuthHeader(authHeader);
if (!credentials) {
return false;
}
// Check credentials against configured users
const { username, password } = credentials;
const users = route.security.basicAuth.users;
return users.some(user => user.username === username && user.password === password);
}
/**
* Clean up caches to prevent memory leaks
*/
cleanupCaches() {
// Clean up rate limits
cleanupExpiredRateLimits(this.rateLimits, this.logger);
// Clean up IP connection tracking
let cleanedIPs = 0;
for (const [ip, info] of this.connectionsByIP.entries()) {
// Remove IPs with no active connections and no recent timestamps
if (info.connections.size === 0 && info.timestamps.length === 0) {
this.connectionsByIP.delete(ip);
cleanedIPs++;
}
}
if (cleanedIPs > 0 && this.logger?.debug) {
this.logger.debug(`Cleaned up ${cleanedIPs} IPs with no active connections`);
}
// IP filter cache doesn't need cleanup (tied to routes)
}
/**
* Clear all IP tracking data (for shutdown)
*/
clearIPTracking() {
this.connectionsByIP.clear();
this.rateLimits.clear();
this.ipFilterCache.clear();
if (this.cleanupInterval) {
clearInterval(this.cleanupInterval);
this.cleanupInterval = null;
}
}
/**
* Update routes for security checking
*
* @param routes - New routes to use
*/
setRoutes(routes) {
// Only clear the IP filter cache - route-specific
this.ipFilterCache.clear();
}
}
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