Initial CoreID changes to allow code-based integration

.gitignore

@@ -9,3 +9,5 @@ tsconfig.tsbuildinfo
 
 # custom certificates
 /ssl-*/
+
+.idea

LICENSE

@@ -0,0 +1,39 @@
+@coreid/node-radius-server - CoreID maintained fork
+Copyright (C) 2021 Simon Tretter, Garrett Mills
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+--
+
+Note: this is a fork of Simon Tretter's node-radius-server package
+modified for use in Starship CoreID. Per the terms of GPLv3, the
+modifications made are documented below:
+
+- Introduced the PackageInterface helper class
+    - enables integrating the library into code rather than as a
+      standalone CLI app
+
+- Modified existing code to use configuration on the PackageInterface
+  class instead of global imports
+
+- Modified existing code to log through PackageInterface.logger
+
+- Modified existing code to introduce a credentialMiddleware method
+  to IPacket, which allows external code to customize the credentials
+  before they are sent
+
+- Modified RadiusService to allow specifying a custom packet decoder
+  method on PackageInterface.
+
+- Modified UDPServer class to expose a stop() method

package.json

@@ -1,6 +1,6 @@
 {
-	"name": "radius-server",
-	"description": "radius server for google LDAP and TTLS",
+	"name": "@coreid/radius-server",
+	"description": "CoreID fork of radius server for google LDAP and TTLS",
 	"version": "1.2.1",
 	"engines": {
 		"node": ">13.10.1"
@@ -14,7 +14,7 @@
 		"dist",
 		"ssl"
 	],
-	"homepage": "https://github.com/simllll/node-radius-server",
+	"homepage": "https://code.garrettmills.dev/starship/node-radius-server",
 	"scripts": {
 		"release": "npm run build && standard-version",
 		"debug": "DEBUG=radius:* node --tls-min-v1.0 dist/app.js",

src/app.ts

@@ -6,17 +6,21 @@ import * as config from '../config';
 import { Authentication } from './auth';
 import { IAuthentication } from './types/Authentication';
 import { startTLSServer } from './tls/crypt';
+import PackageInterface from './interface';
 
-/* test node version */
-const testSocket = startTLSServer();
-if (typeof testSocket.tls.exportKeyingMaterial !== 'function') {
-	console.error(`UNSUPPORTED NODE VERSION (${process.version}) FOUND!!`);
+const packageInterface = PackageInterface.get();
 
-	console.log('min version supported is node js 14. run "sudo npx n 14"');
+const prestartServer = () => {
+	/* test node version */
+	const testSocket = startTLSServer();
+	if (typeof testSocket.tls.exportKeyingMaterial !== 'function') {
+		packageInterface.log(`UNSUPPORTED NODE VERSION (${process.version}) FOUND!!`);
+
+		packageInterface.log('min version supported is node js 14. run "sudo npx n 14"');
 		process.exit(-1);
-}
+	}
 
-const { argv } = yargs
+	const { argv } = yargs
 		.usage('NODE RADIUS Server\nUsage: radius-server')
 		.example('radius-server --port 1812 -s radiussecret', 'start on port 1812 with a secret')
 		.default({
@@ -31,14 +35,15 @@ const { argv } = yargs
 		.number('port')
 		.string(['secret', 'authentication']) as {
 		argv: { port?: number; secret?: string; authentication?: string; authenticationOptions?: any };
+	};
+
+	packageInterface.log(`Listener Port: ${argv.port || 1812}`);
+	packageInterface.log(`RADIUS Secret: ${argv.secret}`);
+	packageInterface.log(`Auth ${argv.authentication}`);
+	packageInterface.log(`Auth Config: ${JSON.stringify(argv.authenticationOptions, undefined, 3)}`);
 };
 
-console.log(`Listener Port: ${argv.port || 1812}`);
-console.log(`RADIUS Secret: ${argv.secret}`);
-console.log(`Auth ${argv.authentication}`);
-console.log(`Auth Config: ${JSON.stringify(argv.authenticationOptions, undefined, 3)}`);
-
-(async () => {
+const startServer = async () => {
 	/* configure auth mechansim */
 	let auth: IAuthentication;
 	try {
@@ -47,7 +52,7 @@ console.log(`Auth Config: ${JSON.stringify(argv.authenticationOptions, undefined
 		];
 		auth = new AuthMechanismus(config.authenticationOptions);
 	} catch (err) {
-		console.error('cannot load auth mechanismus', config.authentication);
+		packageInterface.log('cannot load auth mechanismus', config.authentication);
 		throw err;
 	}
 	// start radius server
@@ -66,7 +71,7 @@ console.log(`Auth Config: ${JSON.stringify(argv.authenticationOptions, undefined
 				rinfo.address,
 				(err, _bytes) => {
 					if (err) {
-						console.log('Error sending response to ', rinfo);
+						packageInterface.log('Error sending response to ', rinfo);
 					}
 				},
 				response.expectAcknowledgment
@@ -76,4 +81,9 @@ console.log(`Auth Config: ${JSON.stringify(argv.authenticationOptions, undefined
 
 	// start server
 	await server.start();
-})();
+};
+
+if (packageInterface.start) {
+	prestartServer();
+	startServer();
+}

src/auth.ts

@@ -1,8 +1,11 @@
 import * as NodeCache from 'node-cache';
 import { Cache, ExpirationStrategy, MemoryStorage } from '@hokify/node-ts-cache';
 import { IAuthentication } from './types/Authentication';
+import PackageInterface from './interface';
 
 const cacheStrategy = new ExpirationStrategy(new MemoryStorage());
+const packageInterface = PackageInterface.get();
+
 /**
  * this is just a simple abstraction to provide
  * an application layer for caching credentials
@@ -12,18 +15,25 @@ export class Authentication implements IAuthentication {
 
 	constructor(private authenticator: IAuthentication) {}
 
-	@Cache(cacheStrategy, { ttl: 60000 })
+	@Cache(cacheStrategy, { ttl: packageInterface.cacheTTL })
 	async authenticate(username: string, password: string): Promise<boolean> {
 		const cacheKey = `usr:${username}|pwd:${password}`;
 		const fromCache = this.cache.get(cacheKey) as undefined | boolean;
 		if (fromCache !== undefined) {
-			console.log(`Cached Auth Result for user ${username}`, fromCache ? 'SUCCESS' : 'Failure');
+			packageInterface.log(
+				`Cached Auth Result for user ${username}`,
+				fromCache ? 'SUCCESS' : 'Failure'
+			);
 			return fromCache;
 		}
 
 		const authResult = await this.authenticator.authenticate(username, password);
-		console.log(`Auth Result for user ${username}`, authResult ? 'SUCCESS' : 'Failure');
-		this.cache.set(cacheKey, authResult, authResult ? 86400 : 60); // cache for one day on success, otherwise just for 60 seconds
+		packageInterface.log(`Auth Result for user ${username}`, authResult ? 'SUCCESS' : 'Failure');
+		this.cache.set(
+			cacheKey,
+			authResult,
+			authResult ? packageInterface.cacheSuccessTTL : packageInterface.cacheFailTTL
+		); // cache for one day on success, otherwise just for 60 seconds
 
 		return authResult;
 	}

src/auth/GoogleLDAPAuth.ts

@@ -1,12 +1,14 @@
 import { ClientOptions, createClient } from 'ldapjs';
-import debug from 'debug';
 import * as tls from 'tls';
 import * as fs from 'fs';
 import { IAuthentication } from '../types/Authentication';
+import PackageInterface from '../interface';
+
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 const usernameFields = ['posixUid', 'mail'];
 
-const log = debug('radius:auth:google-ldap');
 // TLS:
 // https://github.com/ldapjs/node-ldapjs/issues/307
 
@@ -55,7 +57,7 @@ export class GoogleLDAPAuth implements IAuthentication {
 		};
 
 		this.fetchDNs().catch((err) => {
-			console.error('fatal error google ldap auth, cannot fetch DNs', err);
+			log('fatal error google ldap auth, cannot fetch DNs', err);
 		});
 	}
 
@@ -64,7 +66,7 @@ export class GoogleLDAPAuth implements IAuthentication {
 
 		await new Promise<void>((resolve, reject) => {
 			const ldapDNClient = createClient(this.config).on('error', (error) => {
-				console.error('Error in ldap', error);
+				log('Error in ldap', error);
 				reject(error);
 			});
 
@@ -92,7 +94,7 @@ export class GoogleLDAPAuth implements IAuthentication {
 					});
 
 					res.on('error', (ldapErr) => {
-						console.error(`error: ${JSON.stringify(ldapErr)}`);
+						log(`error: ${JSON.stringify(ldapErr)}`);
 						reject(ldapErr);
 					});
 
@@ -144,7 +146,7 @@ export class GoogleLDAPAuth implements IAuthentication {
 				return this.authenticate(username, password, count, true);
 			}
 			// console.log('this.allValidDNsCache', this.allValidDNsCache);
-			console.error(`invalid username, not found in DN: ${username}`); // , this.allValidDNsCache);
+			log(`invalid username, not found in DN: ${username}`); // , this.allValidDNsCache);
 			return false;
 		}
 

src/auth/HTTPAuth.ts

@@ -1,5 +1,9 @@
 import axios from 'axios';
 import { IAuthentication } from '../types/Authentication';
+import PackageInterface from '../interface';
+
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 interface IHTTPAuthOptions {
 	url: string;
@@ -30,7 +34,7 @@ export class HTTPAuth implements IAuthentication {
 			return true;
 		}
 
-		console.log(`HTTP authentication failed, response code: ${result.status}`);
+		log(`HTTP authentication failed, response code: ${result.status}`);
 
 		return false;
 	}

src/auth/IMAPAuth.ts

@@ -1,5 +1,9 @@
 import * as imaps from 'imap-simple';
 import { IAuthentication } from '../types/Authentication';
+import PackageInterface from '../interface';
+
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 interface IIMAPAuthOptions {
 	host: string;
@@ -34,7 +38,7 @@ export class IMAPAuth implements IAuthentication {
 		if (this.validHosts) {
 			const domain = username.split('@').pop();
 			if (!domain || !this.validHosts.includes(domain)) {
-				console.info('invalid or no domain in username', username, domain);
+				log('invalid or no domain in username', username, domain);
 				return false;
 			}
 		}
@@ -57,7 +61,7 @@ export class IMAPAuth implements IAuthentication {
 
 			connection.end();
 		} catch (err) {
-			console.error('imap auth failed', err);
+			log('imap auth failed', err);
 		}
 		return success;
 	}

src/auth/LDAPAuth.ts

@@ -1,6 +1,10 @@
 import * as LdapAuth from 'ldapauth-fork';
 import * as fs from 'fs';
 import { IAuthentication } from '../types/Authentication';
+import PackageInterface from '../interface';
+
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 interface ILDAPAuthOptions {
 	/** ldap url
@@ -44,7 +48,7 @@ export class LDAPAuth implements IAuthentication {
 			reconnect: true,
 		});
 		this.ldap.on('error', (err) => {
-			console.error('LdapAuth: ', err);
+			log('LdapAuth: ', err);
 		});
 	}
 
@@ -53,7 +57,7 @@ export class LDAPAuth implements IAuthentication {
 			this.ldap.authenticate(username, password, (err, user) => {
 				if (err) {
 					resolve(false);
-					console.error('ldap error', err);
+					log('ldap error', err);
 					// reject(err);
 				}
 				if (user) resolve(user);

src/auth/SMTPAuth.ts

@@ -1,5 +1,8 @@
 import { SMTPClient } from 'smtp-client';
 import { IAuthentication } from '../types/Authentication';
+import PackageInterface from '../interface';
+
+const log = (...args) => PackageInterface.get().log(...args);
 
 interface ISMTPAuthOptions {
 	host: string;
@@ -37,7 +40,7 @@ export class SMTPAuth implements IAuthentication {
 		if (this.validHosts) {
 			const domain = username.split('@').pop();
 			if (!domain || !this.validHosts.includes(domain)) {
-				console.info('invalid or no domain in username', username, domain);
+				log('invalid or no domain in username', username, domain);
 				return false;
 			}
 		}
@@ -61,7 +64,7 @@ export class SMTPAuth implements IAuthentication {
 
 			s.close(); // runs QUIT command
 		} catch (err) {
-			console.error('imap auth failed', err);
+			log('imap auth failed', err);
 		}
 		return success;
 	}

src/interface.ts

@@ -0,0 +1,47 @@
+import * as radius from 'radius';
+import * as config from '../config';
+import { IPacket } from './types/PacketHandler';
+
+export type PacketDecoder = (msg: Buffer) => {
+	packet?: radius.RadiusPacket & IPacket;
+	secret: string;
+};
+
+export default class PackageInterface {
+	private static _instance?: PackageInterface;
+
+	public static get(): PackageInterface {
+		if (!this._instance) {
+			this._instance = new PackageInterface();
+		}
+
+		return this._instance;
+	}
+
+	public packetDecoder?: PacketDecoder;
+
+	public start = true;
+
+	public cacheTTL = 60000;
+
+	public cacheSuccessTTL = 86400;
+
+	public cacheFailTTL = 60;
+
+	public logger: (...any: unknown[]) => unknown = console.log; // eslint-disable-line no-console
+
+	private config: any = config;
+
+	public log(...any: unknown[]): void {
+		this.logger(...any);
+	}
+
+	public getConfig(): any {
+		return this.config;
+	}
+
+	// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+	public setConfig(inConfig: any) {
+		this.config = inConfig;
+	}
+}

src/radius/RadiusService.ts

@@ -1,8 +1,11 @@
 import * as radius from 'radius';
 import { IAuthentication } from '../types/Authentication';
-import { IPacketHandlerResult, PacketResponseCode } from '../types/PacketHandler';
+import {IPacket, IPacketHandlerResult, PacketResponseCode} from '../types/PacketHandler';
 
 import { PacketHandler } from './PacketHandler';
+import PackageInterface from '../interface';
+
+const packageInterface = PackageInterface.get();
 
 export class RadiusService {
 	private packetHandler: PacketHandler;
@@ -11,13 +14,29 @@ export class RadiusService {
 		this.packetHandler = new PacketHandler(authentication);
 	}
 
+	defaultDecoder(msg: Buffer): { packet?: radius.RadiusPacket & IPacket; secret: string } {
+		const packet = radius.decode({ packet: msg, secret: this.secret });
+
+		return {
+			packet,
+			secret: this.secret,
+		};
+	}
+
 	async handleMessage(
 		msg: Buffer
 	): Promise<{ data: Buffer; expectAcknowledgment?: boolean } | undefined> {
-		const packet = radius.decode({ packet: msg, secret: this.secret });
+		const { packet, secret } = packageInterface.packetDecoder
+			? packageInterface.packetDecoder(msg)
+			: this.defaultDecoder(msg);
+
+		if (!packet) {
+			packageInterface.log('Unable to parse packet from message.');
+			return undefined;
+		}
 
 		if (packet.code !== 'Access-Request') {
-			console.error('unknown packet type: ', packet.code);
+			packageInterface.log('unknown packet type: ', packet.code);
 			return undefined;
 		}
 
@@ -33,7 +52,7 @@ export class RadiusService {
 			data: radius.encode_response({
 				packet,
 				code: response.code,
-				secret: this.secret,
+				secret,
 				attributes: response.attributes,
 			}),
 			// if message is accept or reject, we conside this as final message

src/radius/handler/EAPPacketHandler.ts

@@ -1,13 +1,14 @@
 // https://tools.ietf.org/html/rfc3748#section-4.1
 
 import * as NodeCache from 'node-cache';
-import debug from 'debug';
 import { makeid } from '../../helpers';
 import { IPacket, IPacketHandler, IPacketHandlerResult } from '../../types/PacketHandler';
 import { IEAPMethod } from '../../types/EAPMethod';
 import { buildEAPResponse, decodeEAPHeader } from './eap/EAPHelper';
+import PackageInterface from '../../interface';
 
-const log = debug('radius:eap');
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 export class EAPPacketHandler implements IPacketHandler {
 	private identities = new NodeCache({ useClones: false, stdTTL: 60 }); // queue data maximum for 60 seconds
@@ -66,15 +67,15 @@ export class EAPPacketHandler implements IPacketHandler {
 							return buildEAPResponse(identifier, 3); // NAK
 						case 2: // notification
 							log('>>>>>>>>>>>> REQUEST FROM CLIENT: notification', {});
-							console.info('notification');
+							log('notification');
 							break;
 						case 4: // md5-challenge
 							log('>>>>>>>>>>>> REQUEST FROM CLIENT: md5-challenge', {});
 
-							console.info('md5-challenge');
+							log('md5-challenge');
 							break;
 						case 254: // expanded type
-							console.error('not implemented type', type);
+							log('not implemented type', type);
 							break;
 						case 3: // nak
 							// console.log('got NAK', data);
@@ -118,7 +119,7 @@ export class EAPPacketHandler implements IPacketHandler {
 								method.getEAPType()
 							);
 
-							console.error('unsupported type', type, `requesting: ${serverSupportedMethods}`);
+							log('unsupported type', type, `requesting: ${serverSupportedMethods}`);
 
 							return buildEAPResponse(identifier, 3, Buffer.from(serverSupportedMethods));
 						}
@@ -135,7 +136,7 @@ export class EAPPacketHandler implements IPacketHandler {
 			// silently ignore;
 			return {};
 		} catch (err) {
-			console.error(
+			log(
 				'decoding of (generic) EAP package failed',
 				msg,
 				err,

src/radius/handler/UserPasswordPacketHandler.ts

@@ -1,4 +1,3 @@
-import debug from 'debug';
 import { IAuthentication } from '../../types/Authentication';
 import {
 	IPacket,
@@ -6,8 +5,10 @@ import {
 	IPacketHandlerResult,
 	PacketResponseCode,
 } from '../../types/PacketHandler';
+import PackageInterface from '../../interface';
 
-const log = debug('radius:user-pwd');
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 export class UserPasswordPacketHandler implements IPacketHandler {
 	constructor(private authentication: IAuthentication) {}
@@ -29,10 +30,11 @@ export class UserPasswordPacketHandler implements IPacketHandler {
 		log('username', username, username.toString());
 		log('token', password, password.toString());
 
-		const authenticated = await this.authentication.authenticate(
-			username.toString(),
-			password.toString()
-		);
+		const [strUsername, strPassword] = packet.credentialMiddleware
+			? packet.credentialMiddleware(username.toString(), password.toString())
+			: [username.toString(), password.toString()];
+
+		const authenticated = await this.authentication.authenticate(strUsername, strPassword);
 		if (authenticated) {
 			// success
 			return {

src/radius/handler/eap/eapMethods/EAP-GTC.ts

@@ -1,13 +1,14 @@
 // https://tools.ietf.org/html/rfc5281 TTLS v0
 // https://tools.ietf.org/html/draft-funk-eap-ttls-v1-00 TTLS v1 (not implemented)
 /* eslint-disable no-bitwise */
-import debug from 'debug';
 import { IPacketHandlerResult, PacketResponseCode } from '../../../../types/PacketHandler';
 import { IEAPMethod } from '../../../../types/EAPMethod';
 import { IAuthentication } from '../../../../types/Authentication';
 import { buildEAPResponse, decodeEAPHeader } from '../EAPHelper';
+import PackageInterface from '../../../../interface';
 
-const log = debug('radius:eap:gtc');
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 export class EAPGTC implements IEAPMethod {
 	getEAPType(): number {
@@ -56,7 +57,7 @@ export class EAPGTC implements IEAPMethod {
 				attributes: (success && [['User-Name', username]]) || undefined,
 			};
 		} catch (err) {
-			console.error('decoding of EAP-GTC package failed', msg, err);
+			log('decoding of EAP-GTC package failed', msg, err);
 			return {
 				code: PacketResponseCode.AccessReject,
 			};

src/radius/handler/eap/eapMethods/EAP-MD5.ts

@@ -2,10 +2,12 @@
 // https://tools.ietf.org/html/draft-funk-eap-ttls-v1-00 TTLS v1 (not implemented)
 /* eslint-disable no-bitwise */
 import { RadiusPacket } from 'radius';
-import debug from 'debug';
 import { IPacketHandlerResult } from '../../../../types/PacketHandler';
 import { IEAPMethod } from '../../../../types/EAPMethod';
 import { IAuthentication } from '../../../../types/Authentication';
+import PackageInterface from '../../../../interface';
+
+const packageInterface = PackageInterface.get();
 
 export class EAPMD5 implements IEAPMethod {
 	getEAPType(): number {
@@ -27,7 +29,7 @@ export class EAPMD5 implements IEAPMethod {
 	): Promise<IPacketHandlerResult> {
 		// not implemented
 
-		debug('eap md5 not implemented...');
+		packageInterface.log('eap md5 not implemented...');
 
 		return {};
 	}

src/radius/handler/eap/eapMethods/EAP-TTLS.ts

@@ -6,8 +6,6 @@ import * as NodeCache from 'node-cache';
 // eslint-disable-next-line @typescript-eslint/ban-ts-comment
 // @ts-ignore
 import { attr_id_to_name, attr_name_to_id } from 'radius';
-import debug from 'debug';
-
 import { encodeTunnelPW, ITLSServer, startTLSServer } from '../../../../tls/crypt';
 import {
 	IPacket,
@@ -20,8 +18,10 @@ import { MAX_RADIUS_ATTRIBUTE_SIZE, newDeferredPromise } from '../../../../helpe
 import { IEAPMethod } from '../../../../types/EAPMethod';
 import { IAuthentication } from '../../../../types/Authentication';
 import { secret } from '../../../../../config';
+import PackageInterface from '../../../../interface';
 
-const log = debug('radius:eap:ttls');
+const packageInterface = PackageInterface.get();
+const log = (...args) => packageInterface.log(...args);
 
 function tlsHasExportKeyingMaterial(tlsSocket): tlsSocket is {
 	exportKeyingMaterial: (length: number, label: string, context?: Buffer) => Buffer;
@@ -276,7 +276,7 @@ export class EAPTTLS implements IEAPMethod {
 				[[17, encodeTunnelPW(keyingMaterial.slice(0, 64), packet.authenticator, secret)]],
 			]); // MS-MPPE-Recv-Key
 		} else {
-			console.error(
+			log(
 				'FATAL: no exportKeyingMaterial method available!!!, you need latest NODE JS, see https://github.com/nodejs/node/pull/31814'
 			);
 		}
@@ -420,7 +420,7 @@ export class EAPTTLS implements IEAPMethod {
 			// send response
 			return responseData; // this.buildEAPTTLSResponse(identifier, 21, 0x00, stateID, encryptedResponseData);
 		} catch (err) {
-			console.error('decoding of EAP-TTLS package failed', msg, err);
+			log('decoding of EAP-TTLS package failed', msg, err);
 			return {
 				code: PacketResponseCode.AccessReject,
 			};

src/server/UDPServer.ts

@@ -4,6 +4,9 @@ import * as events from 'events';
 import { EventEmitter } from 'events';
 import { newDeferredPromise } from '../helpers';
 import { IServer } from '../types/Server';
+import PackageInterface from '../interface';
+
+const packageInterface = PackageInterface.get();
 
 export class UDPServer extends events.EventEmitter implements IServer {
 	static MAX_RETRIES = 3;
@@ -53,7 +56,7 @@ export class UDPServer extends events.EventEmitter implements IServer {
 		const startServer = newDeferredPromise();
 		this.server.on('listening', () => {
 			const address = this.server.address();
-			console.log(`radius server listening ${address.address}:${address.port}`);
+			packageInterface.log(`radius server listening ${address.address}:${address.port}`);
 
 			this.setupListeners();
 			startServer.resolve();
@@ -72,6 +75,12 @@ export class UDPServer extends events.EventEmitter implements IServer {
 		return startServer.promise;
 	}
 
+	stop(): Promise<void> {
+		return new Promise<void>((res) => {
+			this.server.close(() => res());
+		});
+	}
+
 	private setupListeners() {
 		this.server.on('message', (message, rinfo) => this.emit('message', message, rinfo));
 	}

src/tls/crypt.ts

@@ -3,33 +3,36 @@ import * as tls from 'tls';
 import { createSecureContext } from 'tls';
 import * as crypto from 'crypto';
 import * as DuplexPair from 'native-duplexpair';
-import debug from 'debug';
 import * as NodeCache from 'node-cache';
 // import * as constants from 'constants';
-import * as config from '../../config';
+import PackageInterface from '../interface';
 
-const log = debug('radius:tls');
+const packageInterface = PackageInterface.get();
+
+const log = (...args) => packageInterface.log(...args);
 
 // https://nodejs.org/api/tls.html
-const tlsOptions: tls.SecureContextOptions = {
-	...config.certificate,
-};
-log('tlsOptions', tlsOptions);
-const secureContext = createSecureContext(tlsOptions);
+export function getTLSSecureContext(): tls.SecureContext {
+	const tlsOptions: tls.SecureContextOptions = {
+		...packageInterface.getConfig().certificate,
+	};
+
+	return createSecureContext(tlsOptions);
+}
 
 export interface ITLSServer {
 	events: events.EventEmitter;
 	tls: tls.TLSSocket;
 }
 
-const resumeSessions = new NodeCache({ stdTTL: 86400 }); // session reidentification maximum 1 day
+const resumeSessions = new NodeCache({ stdTTL: packageInterface.cacheTTL }); // session reidentification maximum 1 day
 
 export function startTLSServer(): ITLSServer {
 	const duplexpair = new DuplexPair();
 	const emitter = new events.EventEmitter();
 
 	const cleartext = new tls.TLSSocket(duplexpair.socket1, {
-		secureContext,
+		secureContext: getTLSSecureContext(),
 		isServer: true,
 		// enableTrace: true,
 		rejectUnauthorized: false,

src/types/PacketHandler.ts

@@ -16,6 +16,7 @@ export interface IPacketAttributes {
 export interface IPacket {
 	attributes: { [key: string]: string | Buffer };
 	authenticator?: Buffer;
+	credentialMiddleware?: (username: string, password: string) => [string, string];
 }
 
 export interface IPacketHandler {