import * as plugins from '../plugins.js'; import * as paths from '../paths.js'; import { logger } from '../logger.js'; import { SecurityLogger, SecurityLogLevel, SecurityEventType } from './classes.securitylogger.js'; import { LRUCache } from 'lru-cache'; /** * Reputation threshold scores */ export var ReputationThreshold; (function (ReputationThreshold) { ReputationThreshold[ReputationThreshold["HIGH_RISK"] = 20] = "HIGH_RISK"; ReputationThreshold[ReputationThreshold["MEDIUM_RISK"] = 50] = "MEDIUM_RISK"; ReputationThreshold[ReputationThreshold["LOW_RISK"] = 80] = "LOW_RISK"; // Score below this is considered low risk (but not trusted) })(ReputationThreshold || (ReputationThreshold = {})); /** * IP type classifications */ export var IPType; (function (IPType) { IPType["RESIDENTIAL"] = "residential"; IPType["DATACENTER"] = "datacenter"; IPType["PROXY"] = "proxy"; IPType["TOR"] = "tor"; IPType["VPN"] = "vpn"; IPType["UNKNOWN"] = "unknown"; })(IPType || (IPType = {})); /** * Class for checking IP reputation of inbound email senders */ export class IPReputationChecker { static instance; reputationCache; options; storageManager; // StorageManager instance // Default DNSBL servers static DEFAULT_DNSBL_SERVERS = [ 'zen.spamhaus.org', // Spamhaus 'bl.spamcop.net', // SpamCop 'b.barracudacentral.org', // Barracuda 'spam.dnsbl.sorbs.net', // SORBS 'dnsbl.sorbs.net', // SORBS (expanded) 'cbl.abuseat.org', // Composite Blocking List 'xbl.spamhaus.org', // Spamhaus XBL 'pbl.spamhaus.org', // Spamhaus PBL 'dnsbl-1.uceprotect.net', // UCEPROTECT 'psbl.surriel.com' // PSBL ]; // Default options static DEFAULT_OPTIONS = { maxCacheSize: 10000, cacheTTL: 24 * 60 * 60 * 1000, // 24 hours dnsblServers: IPReputationChecker.DEFAULT_DNSBL_SERVERS, highRiskThreshold: ReputationThreshold.HIGH_RISK, mediumRiskThreshold: ReputationThreshold.MEDIUM_RISK, lowRiskThreshold: ReputationThreshold.LOW_RISK, enableLocalCache: true, enableDNSBL: true, enableIPInfo: true }; /** * Constructor for IPReputationChecker * @param options Configuration options * @param storageManager Optional StorageManager instance for persistence */ constructor(options = {}, storageManager) { // Merge with default options this.options = { ...IPReputationChecker.DEFAULT_OPTIONS, ...options }; this.storageManager = storageManager; // If no storage manager provided, log warning if (!storageManager && this.options.enableLocalCache) { logger.log('warn', '⚠️ WARNING: IPReputationChecker initialized without StorageManager.\n' + ' IP reputation cache will only be stored to filesystem.\n' + ' Consider passing a StorageManager instance for better storage flexibility.'); } // Initialize reputation cache this.reputationCache = new LRUCache({ max: this.options.maxCacheSize, ttl: this.options.cacheTTL, // Cache TTL }); // Load cache from disk if enabled if (this.options.enableLocalCache) { // Fire and forget the load operation this.loadCache().catch(error => { logger.log('error', `Failed to load IP reputation cache during initialization: ${error.message}`); }); } } /** * Get the singleton instance of the checker * @param options Configuration options * @param storageManager Optional StorageManager instance for persistence * @returns Singleton instance */ static getInstance(options = {}, storageManager) { if (!IPReputationChecker.instance) { IPReputationChecker.instance = new IPReputationChecker(options, storageManager); } return IPReputationChecker.instance; } /** * Check an IP address's reputation * @param ip IP address to check * @returns Reputation check result */ async checkReputation(ip) { try { // Validate IP address format if (!this.isValidIPAddress(ip)) { logger.log('warn', `Invalid IP address format: ${ip}`); return this.createErrorResult(ip, 'Invalid IP address format'); } // Check cache first const cachedResult = this.reputationCache.get(ip); if (cachedResult) { logger.log('info', `Using cached reputation data for IP ${ip}`, { score: cachedResult.score, isSpam: cachedResult.isSpam }); return cachedResult; } // Initialize empty result const result = { score: 100, // Start with perfect score isSpam: false, isProxy: false, isTor: false, isVPN: false, timestamp: Date.now() }; // Check IP against DNS blacklists if enabled if (this.options.enableDNSBL) { const dnsblResult = await this.checkDNSBL(ip); // Update result with DNSBL information result.score -= dnsblResult.listCount * 10; // Subtract 10 points per blacklist result.isSpam = dnsblResult.listCount > 0; result.blacklists = dnsblResult.lists; } // Get additional IP information if enabled if (this.options.enableIPInfo) { const ipInfo = await this.getIPInfo(ip); // Update result with IP info result.country = ipInfo.country; result.asn = ipInfo.asn; result.org = ipInfo.org; // Adjust score based on IP type if (ipInfo.type === IPType.PROXY || ipInfo.type === IPType.TOR || ipInfo.type === IPType.VPN) { result.score -= 30; // Subtract 30 points for proxies, Tor, VPNs // Set proxy flags result.isProxy = ipInfo.type === IPType.PROXY; result.isTor = ipInfo.type === IPType.TOR; result.isVPN = ipInfo.type === IPType.VPN; } } // Ensure score is between 0 and 100 result.score = Math.max(0, Math.min(100, result.score)); // Update cache with result this.reputationCache.set(ip, result); // Save cache if enabled if (this.options.enableLocalCache) { // Fire and forget the save operation this.saveCache().catch(error => { logger.log('error', `Failed to save IP reputation cache: ${error.message}`); }); } // Log the reputation check this.logReputationCheck(ip, result); return result; } catch (error) { logger.log('error', `Error checking IP reputation for ${ip}: ${error.message}`, { ip, stack: error.stack }); return this.createErrorResult(ip, error.message); } } /** * Check an IP against DNS blacklists * @param ip IP address to check * @returns DNSBL check results */ async checkDNSBL(ip) { try { // Reverse the IP for DNSBL queries const reversedIP = this.reverseIP(ip); const results = await Promise.allSettled(this.options.dnsblServers.map(async (server) => { try { const lookupDomain = `${reversedIP}.${server}`; await plugins.dns.promises.resolve(lookupDomain); return server; // IP is listed in this DNSBL } catch (error) { if (error.code === 'ENOTFOUND') { return null; // IP is not listed in this DNSBL } throw error; // Other error } })); // Extract successful lookups (listed in DNSBL) const lists = results .filter((result) => result.status === 'fulfilled' && result.value !== null) .map(result => result.value); return { listCount: lists.length, lists }; } catch (error) { logger.log('error', `Error checking DNSBL for ${ip}: ${error.message}`); return { listCount: 0, lists: [] }; } } /** * Get information about an IP address * @param ip IP address to check * @returns IP information */ async getIPInfo(ip) { try { // In a real implementation, this would use an IP data service API // For this implementation, we'll use a simplified approach // Check if it's a known Tor exit node (simplified) const isTor = ip.startsWith('171.25.') || ip.startsWith('185.220.') || ip.startsWith('95.216.'); // Check if it's a known VPN (simplified) const isVPN = ip.startsWith('185.156.') || ip.startsWith('37.120.'); // Check if it's a known proxy (simplified) const isProxy = ip.startsWith('34.92.') || ip.startsWith('34.206.'); // Determine IP type let type = IPType.UNKNOWN; if (isTor) { type = IPType.TOR; } else if (isVPN) { type = IPType.VPN; } else if (isProxy) { type = IPType.PROXY; } else { // Simple datacenters detection (major cloud providers) if (ip.startsWith('13.') || // AWS ip.startsWith('35.') || // Google Cloud ip.startsWith('52.') || // AWS ip.startsWith('34.') || // Google Cloud ip.startsWith('104.') // Various providers ) { type = IPType.DATACENTER; } else { type = IPType.RESIDENTIAL; } } // Return the information return { country: this.determineCountry(ip), // Simplified, would use geolocation service asn: 'AS12345', // Simplified, would look up real ASN org: this.determineOrg(ip), // Simplified, would use real org data type }; } catch (error) { logger.log('error', `Error getting IP info for ${ip}: ${error.message}`); return { type: IPType.UNKNOWN }; } } /** * Simplified method to determine country from IP * In a real implementation, this would use a geolocation database or service * @param ip IP address * @returns Country code */ determineCountry(ip) { // Simplified mapping for demo purposes if (ip.startsWith('13.') || ip.startsWith('52.')) return 'US'; if (ip.startsWith('35.') || ip.startsWith('34.')) return 'US'; if (ip.startsWith('185.')) return 'NL'; if (ip.startsWith('171.')) return 'DE'; return 'XX'; // Unknown } /** * Simplified method to determine organization from IP * In a real implementation, this would use an IP-to-org database or service * @param ip IP address * @returns Organization name */ determineOrg(ip) { // Simplified mapping for demo purposes if (ip.startsWith('13.') || ip.startsWith('52.')) return 'Amazon AWS'; if (ip.startsWith('35.') || ip.startsWith('34.')) return 'Google Cloud'; if (ip.startsWith('185.156.')) return 'NordVPN'; if (ip.startsWith('37.120.')) return 'ExpressVPN'; if (ip.startsWith('185.220.')) return 'Tor Exit Node'; return 'Unknown'; } /** * Reverse an IP address for DNSBL lookups (e.g., 1.2.3.4 -> 4.3.2.1) * @param ip IP address to reverse * @returns Reversed IP for DNSBL queries */ reverseIP(ip) { return ip.split('.').reverse().join('.'); } /** * Create an error result for when reputation check fails * @param ip IP address * @param errorMessage Error message * @returns Error result */ createErrorResult(ip, errorMessage) { return { score: 50, // Neutral score for errors isSpam: false, isProxy: false, isTor: false, isVPN: false, timestamp: Date.now(), error: errorMessage }; } /** * Validate IP address format * @param ip IP address to validate * @returns Whether the IP is valid */ isValidIPAddress(ip) { // IPv4 regex pattern const ipv4Pattern = /^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/; return ipv4Pattern.test(ip); } /** * Log reputation check to security logger * @param ip IP address * @param result Reputation result */ logReputationCheck(ip, result) { // Determine log level based on reputation score let logLevel = SecurityLogLevel.INFO; if (result.score < this.options.highRiskThreshold) { logLevel = SecurityLogLevel.WARN; } else if (result.score < this.options.mediumRiskThreshold) { logLevel = SecurityLogLevel.INFO; } // Log the check SecurityLogger.getInstance().logEvent({ level: logLevel, type: SecurityEventType.IP_REPUTATION, message: `IP reputation check ${result.isSpam ? 'flagged spam' : 'completed'} for ${ip}`, ipAddress: ip, details: { score: result.score, isSpam: result.isSpam, isProxy: result.isProxy, isTor: result.isTor, isVPN: result.isVPN, country: result.country, blacklists: result.blacklists }, success: !result.isSpam }); } /** * Save cache to disk or storage manager */ async saveCache() { try { // Convert cache entries to serializable array const entries = Array.from(this.reputationCache.entries()).map(([ip, data]) => ({ ip, data })); // Only save if we have entries if (entries.length === 0) { return; } const cacheData = JSON.stringify(entries); // Save to storage manager if available if (this.storageManager) { await this.storageManager.set('/security/ip-reputation-cache.json', cacheData); logger.log('info', `Saved ${entries.length} IP reputation cache entries to StorageManager`); } else { // Fall back to filesystem const cacheDir = plugins.path.join(paths.dataDir, 'security'); await plugins.smartfs.directory(cacheDir).recursive().create(); const cacheFile = plugins.path.join(cacheDir, 'ip_reputation_cache.json'); await plugins.smartfs.file(cacheFile).write(cacheData); logger.log('info', `Saved ${entries.length} IP reputation cache entries to disk`); } } catch (error) { logger.log('error', `Failed to save IP reputation cache: ${error.message}`); } } /** * Load cache from disk or storage manager */ async loadCache() { try { let cacheData = null; let fromFilesystem = false; // Try to load from storage manager first if (this.storageManager) { try { cacheData = await this.storageManager.get('/security/ip-reputation-cache.json'); if (!cacheData) { // Check if data exists in filesystem and migrate it const cacheFile = plugins.path.join(paths.dataDir, 'security', 'ip_reputation_cache.json'); if (plugins.fs.existsSync(cacheFile)) { logger.log('info', 'Migrating IP reputation cache from filesystem to StorageManager'); cacheData = plugins.fs.readFileSync(cacheFile, 'utf8'); fromFilesystem = true; // Migrate to storage manager await this.storageManager.set('/security/ip-reputation-cache.json', cacheData); logger.log('info', 'IP reputation cache migrated to StorageManager successfully'); // Optionally delete the old file after successful migration try { plugins.fs.unlinkSync(cacheFile); logger.log('info', 'Old cache file removed after migration'); } catch (deleteError) { logger.log('warn', `Could not delete old cache file: ${deleteError.message}`); } } } } catch (error) { logger.log('error', `Error loading from StorageManager: ${error.message}`); } } else { // No storage manager, load from filesystem const cacheFile = plugins.path.join(paths.dataDir, 'security', 'ip_reputation_cache.json'); if (plugins.fs.existsSync(cacheFile)) { cacheData = plugins.fs.readFileSync(cacheFile, 'utf8'); fromFilesystem = true; } } // Parse and restore cache if data was found if (cacheData) { const entries = JSON.parse(cacheData); // Validate and filter entries const now = Date.now(); const validEntries = entries.filter(entry => { const age = now - entry.data.timestamp; return age < this.options.cacheTTL; // Only load entries that haven't expired }); // Restore cache for (const entry of validEntries) { this.reputationCache.set(entry.ip, entry.data); } const source = fromFilesystem ? 'disk' : 'StorageManager'; logger.log('info', `Loaded ${validEntries.length} IP reputation cache entries from ${source}`); } } catch (error) { logger.log('error', `Failed to load IP reputation cache: ${error.message}`); } } /** * Get the risk level for a reputation score * @param score Reputation score (0-100) * @returns Risk level description */ static getRiskLevel(score) { if (score < ReputationThreshold.HIGH_RISK) { return 'high'; } else if (score < ReputationThreshold.MEDIUM_RISK) { return 'medium'; } else if (score < ReputationThreshold.LOW_RISK) { return 'low'; } else { return 'trusted'; } } /** * Update the storage manager after instantiation * This is useful when the storage manager is not available at construction time * @param storageManager The StorageManager instance to use */ updateStorageManager(storageManager) { this.storageManager = storageManager; logger.log('info', 'IPReputationChecker storage manager updated'); // If cache is enabled and we have entries, save them to the new storage manager if (this.options.enableLocalCache && this.reputationCache.size > 0) { this.saveCache().catch(error => { logger.log('error', `Failed to save cache to new storage manager: ${error.message}`); }); } } } //# 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