@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.
374 lines • 28.5 kB
JavaScript
import * as plugins from '../../plugins.js';
/**
* Manages security features for the NetworkProxy
* Implements Phase 5.4: Security features like IP filtering and rate limiting
*/
export class SecurityManager {
constructor(logger, routes = [], maxConnectionsPerIP = 100, connectionRateLimitPerMinute = 300) {
this.logger = logger;
this.routes = routes;
this.maxConnectionsPerIP = maxConnectionsPerIP;
this.connectionRateLimitPerMinute = connectionRateLimitPerMinute;
// Cache IP filtering results to avoid constant regex matching
this.ipFilterCache = new Map();
// Store rate limits per route and key
this.rateLimits = new Map();
// Connection tracking by IP
this.connectionsByIP = new Map();
this.connectionRateByIP = new Map();
// Start periodic cleanup for connection tracking
this.startPeriodicIpCleanup();
}
/**
* Update the routes configuration
*/
setRoutes(routes) {
this.routes = routes;
// Reset caches when routes change
this.ipFilterCache.clear();
}
/**
* Check if a client is allowed to access a specific route
*
* @param route The route to check access for
* @param context The route context with client information
* @returns True if access is allowed, false otherwise
*/
isAllowed(route, context) {
if (!route.security) {
return true; // No security restrictions
}
// --- IP filtering ---
if (!this.isIpAllowed(route, context.clientIp)) {
this.logger.debug(`IP ${context.clientIp} is blocked for route ${route.name || route.id || 'unnamed'}`);
return false;
}
// --- Rate limiting ---
if (route.security.rateLimit?.enabled && !this.isWithinRateLimit(route, context)) {
this.logger.debug(`Rate limit exceeded for route ${route.name || route.id || 'unnamed'}`);
return false;
}
// --- Basic Auth (handled at HTTP level) ---
// Basic auth is not checked here as it requires HTTP headers
// and is handled in the RequestHandler
return true;
}
/**
* Check if an IP is allowed based on route security settings
*/
isIpAllowed(route, clientIp) {
if (!route.security) {
return true; // No security restrictions
}
const routeId = route.id || route.name || 'unnamed';
// Check cache first
if (!this.ipFilterCache.has(routeId)) {
this.ipFilterCache.set(routeId, new Map());
}
const routeCache = this.ipFilterCache.get(routeId);
if (routeCache.has(clientIp)) {
return routeCache.get(clientIp);
}
let allowed = true;
// Check block list first (deny has priority over allow)
if (route.security.ipBlockList && route.security.ipBlockList.length > 0) {
if (this.ipMatchesPattern(clientIp, route.security.ipBlockList)) {
allowed = false;
}
}
// Then check allow list (overrides block list if specified)
if (route.security.ipAllowList && route.security.ipAllowList.length > 0) {
// If allow list is specified, IP must match an entry to be allowed
allowed = this.ipMatchesPattern(clientIp, route.security.ipAllowList);
}
// Cache the result
routeCache.set(clientIp, allowed);
return allowed;
}
/**
* Check if IP matches any pattern in the list
*/
ipMatchesPattern(ip, patterns) {
for (const pattern of patterns) {
// CIDR notation
if (pattern.includes('/')) {
if (this.ipMatchesCidr(ip, pattern)) {
return true;
}
}
// Wildcard notation
else if (pattern.includes('*')) {
const regex = new RegExp('^' + pattern.replace(/\./g, '\\.').replace(/\*/g, '.*') + '$');
if (regex.test(ip)) {
return true;
}
}
// Exact match
else if (pattern === ip) {
return true;
}
}
return false;
}
/**
* Check if IP matches CIDR notation
* Very basic implementation - for production use, consider a dedicated IP library
*/
ipMatchesCidr(ip, cidr) {
try {
const [subnet, bits] = cidr.split('/');
const mask = parseInt(bits, 10);
// Convert IP to numeric format
const ipParts = ip.split('.').map(part => parseInt(part, 10));
const subnetParts = subnet.split('.').map(part => parseInt(part, 10));
// Calculate the numeric IP and subnet
const ipNum = (ipParts[0] << 24) | (ipParts[1] << 16) | (ipParts[2] << 8) | ipParts[3];
const subnetNum = (subnetParts[0] << 24) | (subnetParts[1] << 16) | (subnetParts[2] << 8) | subnetParts[3];
// Calculate the mask
const maskNum = ~((1 << (32 - mask)) - 1);
// Check if IP is in subnet
return (ipNum & maskNum) === (subnetNum & maskNum);
}
catch (e) {
this.logger.error(`Invalid CIDR notation: ${cidr}`);
return false;
}
}
/**
* Check if request is within rate limit
*/
isWithinRateLimit(route, context) {
if (!route.security?.rateLimit?.enabled) {
return true;
}
const rateLimit = route.security.rateLimit;
const routeId = route.id || route.name || 'unnamed';
// Determine rate limit key (by IP, path, or header)
let key = context.clientIp; // Default to IP
if (rateLimit.keyBy === 'path' && context.path) {
key = `${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;
}
/**
* Clean up expired rate limits
* Should be called periodically to prevent memory leaks
*/
cleanupExpiredRateLimits() {
const now = Date.now();
for (const [routeId, routeLimits] of this.rateLimits.entries()) {
let removed = 0;
for (const [key, limit] of routeLimits.entries()) {
if (limit.expiry < now) {
routeLimits.delete(key);
removed++;
}
}
if (removed > 0) {
this.logger.debug(`Cleaned up ${removed} expired rate limits for route ${routeId}`);
}
}
}
/**
* Check basic auth credentials
*
* @param route The route to check auth for
* @param username The provided username
* @param password The provided password
* @returns True if credentials are valid, false otherwise
*/
checkBasicAuth(route, username, password) {
if (!route.security?.basicAuth?.enabled) {
return true;
}
const basicAuth = route.security.basicAuth;
// Check credentials against configured users
for (const user of basicAuth.users) {
if (user.username === username && user.password === password) {
return true;
}
}
return false;
}
/**
* Verify a JWT token
*
* @param route The route to verify the token for
* @param token The JWT token to verify
* @returns True if the token is valid, false otherwise
*/
verifyJwtToken(route, token) {
if (!route.security?.jwtAuth?.enabled) {
return true;
}
try {
// This is a simplified version - in production you'd use a proper JWT library
const jwtAuth = route.security.jwtAuth;
// Verify structure
const parts = token.split('.');
if (parts.length !== 3) {
return false;
}
// Decode payload
const payload = JSON.parse(Buffer.from(parts[1], 'base64').toString());
// Check expiration
if (payload.exp && payload.exp < Math.floor(Date.now() / 1000)) {
return false;
}
// Check issuer
if (jwtAuth.issuer && payload.iss !== jwtAuth.issuer) {
return false;
}
// Check audience
if (jwtAuth.audience && payload.aud !== jwtAuth.audience) {
return false;
}
// In a real implementation, you'd also verify the signature
// using the secret and algorithm specified in jwtAuth
return true;
}
catch (err) {
this.logger.error(`Error verifying JWT: ${err}`);
return false;
}
}
/**
* Get connections count by IP
*/
getConnectionCountByIP(ip) {
return this.connectionsByIP.get(ip)?.size || 0;
}
/**
* Check and update connection rate for an IP
* @returns true if within rate limit, false if exceeding limit
*/
checkConnectionRate(ip) {
const now = Date.now();
const minute = 60 * 1000;
if (!this.connectionRateByIP.has(ip)) {
this.connectionRateByIP.set(ip, [now]);
return true;
}
// Get timestamps and filter out entries older than 1 minute
const timestamps = this.connectionRateByIP.get(ip).filter((time) => now - time < minute);
timestamps.push(now);
this.connectionRateByIP.set(ip, timestamps);
// Check if rate exceeds limit
return timestamps.length <= this.connectionRateLimitPerMinute;
}
/**
* Track connection by IP
*/
trackConnectionByIP(ip, connectionId) {
if (!this.connectionsByIP.has(ip)) {
this.connectionsByIP.set(ip, new Set());
}
this.connectionsByIP.get(ip).add(connectionId);
}
/**
* Remove connection tracking for an IP
*/
removeConnectionByIP(ip, connectionId) {
if (this.connectionsByIP.has(ip)) {
const connections = this.connectionsByIP.get(ip);
connections.delete(connectionId);
if (connections.size === 0) {
this.connectionsByIP.delete(ip);
}
}
}
/**
* Check if IP should be allowed considering connection rate and max connections
* @returns Object with result and reason
*/
validateIP(ip) {
// Check connection count limit
if (this.getConnectionCountByIP(ip) >= this.maxConnectionsPerIP) {
return {
allowed: false,
reason: `Maximum connections per IP (${this.maxConnectionsPerIP}) exceeded`
};
}
// Check connection rate limit
if (!this.checkConnectionRate(ip)) {
return {
allowed: false,
reason: `Connection rate limit (${this.connectionRateLimitPerMinute}/min) exceeded`
};
}
return { allowed: true };
}
/**
* Clears all IP tracking data (for shutdown)
*/
clearIPTracking() {
this.connectionsByIP.clear();
this.connectionRateByIP.clear();
}
/**
* Start periodic cleanup of IP tracking data
*/
startPeriodicIpCleanup() {
// Clean up IP tracking data every minute
setInterval(() => {
this.performIpCleanup();
}, 60000).unref();
}
/**
* Perform cleanup of expired IP data
*/
performIpCleanup() {
const now = Date.now();
const minute = 60 * 1000;
let cleanedRateLimits = 0;
let cleanedIPs = 0;
// Clean up expired rate limit timestamps
for (const [ip, timestamps] of this.connectionRateByIP.entries()) {
const validTimestamps = timestamps.filter(time => now - time < minute);
if (validTimestamps.length === 0) {
this.connectionRateByIP.delete(ip);
cleanedRateLimits++;
}
else if (validTimestamps.length < timestamps.length) {
this.connectionRateByIP.set(ip, validTimestamps);
}
}
// Clean up IPs with no active connections
for (const [ip, connections] of this.connectionsByIP.entries()) {
if (connections.size === 0) {
this.connectionsByIP.delete(ip);
cleanedIPs++;
}
}
if (cleanedRateLimits > 0 || cleanedIPs > 0) {
this.logger.debug(`IP cleanup: removed ${cleanedIPs} IPs and ${cleanedRateLimits} rate limits`);
}
}
}
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