Passport is Express-compatible authentication middleware for Node.js.

Passport's sole purpose is to authenticate requests, which it does through an extensible set of plugins known as strategies. Passport does not mount routes or assume any particular database schema, which maximizes flexibility and allows application-level decisions to be made by the developer. The API is simple: you provide Passport a request to authenticate, and Passport provides hooks for controlling what occurs when authentication succeeds or fails.

^Sponsors

Simple Authentication
Make login our problem. Not yours.

Auth0 by Okta provides a simple and customizable login page to authenticate your users. You can dynamically add new capabilities to it - including social login, multi-factor authentication, or passkeys - without making changes to your app’s code.

We help protect your app and your users from attacks - defending your application from bot attacks and detecting runtime anomalies based on suspicious IPs, breached credentials, user context, and more.

Your app, enterprise-ready.
Start selling to enterprise customers with just a few lines of code. Add Single Sign-On (and more) in minutes instead of months.

Drag and drop your auth
Add authentication and user management to your consumer and business apps with a few lines of code.

Auth. Built for Devs, by Devs
Add login, registration, SSO, MFA, and a bazillion other features to your app in minutes. Integrates with any codebase and installs on any server, anywhere in the world.

API-first AuthN, AuthZ, and Fraud Prevention
The most powerful identity platform built for developers. Easily build and secure a modern auth flow with user & org management, multi-tenant SSO, MFA, RBAC, device fingerprinting, and more.

Status:

$ npm install passport

Passport uses the concept of strategies to authenticate requests. Strategies can range from verifying username and password credentials, delegated authentication using OAuth (for example, via Facebook or Twitter), or federated authentication using OpenID.

Before authenticating requests, the strategy (or strategies) used by an application must be configured.

passport.use(new LocalStrategy(
  function(username, password, done) {
    User.findOne({ username: username }, function (err, user) {
      if (err) { return done(err); }
      if (!user) { return done(null, false); }
      if (!user.verifyPassword(password)) { return done(null, false); }
      return done(null, user);
    });
  }
));

There are 480+ strategies. Find the ones you want at: passportjs.org

Passport will maintain persistent login sessions. In order for persistent sessions to work, the authenticated user must be serialized to the session, and deserialized when subsequent requests are made.

Passport does not impose any restrictions on how your user records are stored. Instead, you provide functions to Passport which implements the necessary serialization and deserialization logic. In a typical application, this will be as simple as serializing the user ID, and finding the user by ID when deserializing.

passport.serializeUser(function(user, done) {
  done(null, user.id);
});

passport.deserializeUser(function(id, done) {
  User.findById(id, function (err, user) {
    done(err, user);
  });
});

To use Passport in an Express or Connect-based application, configure it with the required passport.initialize() middleware. If your application uses persistent login sessions (recommended, but not required), passport.session() middleware must also be used.

var app = express();
app.use(require('serve-static')(__dirname + '/../../public'));
app.use(require('cookie-parser')());
app.use(require('body-parser').urlencoded({ extended: true }));
app.use(require('express-session')({ secret: 'keyboard cat', resave: true, saveUninitialized: true }));
app.use(passport.initialize());
app.use(passport.session());

Passport provides an authenticate() function, which is used as route middleware to authenticate requests.

app.post('/login', 
  passport.authenticate('local', { failureRedirect: '/login' }),
  function(req, res) {
    res.redirect('/');
  });

Passport has a comprehensive set of over 480 authentication strategies covering social networking, enterprise integration, API services, and more.

There is a Strategy Search at passportjs.org

The following table lists commonly used strategies:

• For a complete, working example, refer to the example that uses passport-local.
• Local Strategy: Refer to the following tutorials for setting up user authentication via LocalStrategy (passport-local):
  • Mongo
    • Express v3x - Tutorial / working example
    • Express v4x - Tutorial / working example
  • Postgres
    • Tutorial / working example
• Social Authentication: Refer to the following tutorials for setting up various social authentication strategies:
  • Express v3x - Tutorial / working example
  • Express v4x - Tutorial / working example

• Locomotive — Powerful MVC web framework
• OAuthorize — OAuth service provider toolkit
• OAuth2orize — OAuth 2.0 authorization server toolkit
• connect-ensure-login — middleware to ensure login sessions

The modules page on the wiki lists other useful modules that build upon or integrate with Passport.

The MIT License

Copyright (c) 2011-2021 Jared Hanson <https://www.jaredhanson.me/>