user-session-middleware

Shared middleware code for session handling and security handling of requests, and authenticating sessions against oauth credentials.

This code wraps express-session, but significant additional checks to protect against bruteforce attacks, re-use of existing session IDs, session ID regeneration, and login/logout/session regneration calls.

Requirements

Expects [email protected] or higher but is built on 20.15.1 presently.
[email protected] is required by workflows due to json schema changes in 10.8.1 and higher. express@>=4 must be provided by the parent app including this library.

Nodemon can be used optionally to watch and re-build on changes automatically.

Usage

To include in a project, you'll need an express server object created. Pass it to the main function using:

  import { UserSessionOptions, useUserSessionMiddleware } from '@tjsr/user-session-middleware';
  import { mysqlSessionStore } from '@tjsr/user-session-middleware';

  const sessionOptions: Partial<UserSessionOptions> = {
    skipExposeHeaders: false,
    store: mysqlSessionStore,
  };
  const app: express.Express = express();

  useUserSessionMiddleware(app, sessionOptions);

Configuration options

USM currently has the following config options:

• rejectUnrecognizedSessionId - Return a 401 if the session id is not recognized in store

• validateMiddlewareDependencies - Check and throw an error if a middleware call that's expected didn't occur

• skipExposeHeaders - Don't set * as the Access-Control-Allow-Origin header

• useForwardedSessions - Look for the session id in the X-Session-Id header

• disableSessionRefresh - Don't permit a session ID to be renewed by calling /session

• disableLoginEndpoints - Don't bind the /login and /logout endpoints

• userIdNamespace - The UUID namespace to separate out generated User IDs to ensure unuqieness across systems.

• logoutPath - default /logout - the GET/POST URL available to invalidate the user and log out.

• loginPath - default /login - the GET/POST URL available to authenticate the user.

• sessionPath - default /session - the GET/POST URL available to forcibly regenerate and assign a new session ID.

Building

First, npm install for dependencies. To verify everything is okay, npm build and npm test.