next-auth: A TypeScript repository from iuzn

NextAuth.js

Authentication for Next.js

Open Source. Full Stack. Own Your Data.

Overview

NextAuth.js is a complete open source authentication solution for Next.js applications.

It is designed from the ground up to support Next.js and Serverless.

This is the core repo for NextAuth.js. Check the repos below if you are interested in additional information:

Docs related: https://github.com/nextauthjs/docs
Adapter related: https://github.com/nextauthjs/adapters

Getting Started

npm install --save next-auth

The easiest way to continue getting started, is to follow the getting started section in our docs.

We also have a section of tutorials for those looking for more specific examples.

See next-auth.js.org for more information and documentation.

Features

Flexible and easy to use

Designed to work with any OAuth service, it supports OAuth 1.0, 1.0A and 2.0
Built-in support for many popular sign-in services
Supports email / passwordless authentication
Supports stateless authentication with any backend (Active Directory, LDAP, etc)
Supports both JSON Web Tokens and database sessions
Designed for Serverless but runs anywhere (AWS Lambda, Docker, Heroku, etc…)

Own your own data

NextAuth.js can be used with or without a database.

An open source solution that allows you to keep control of your data
Supports Bring Your Own Database (BYOD) and can be used with any database
Built-in support for MySQL, MariaDB, Postgres, Microsoft SQL Server, MongoDB and SQLite
Works great with databases from popular hosting providers
Can also be used without a database (e.g. OAuth + JWT)

Secure by default

Promotes the use of passwordless sign-in mechanisms
Designed to be secure by default and encourage best practices for safeguarding user data
Uses Cross-Site Request Forgery (CSRF) Tokens on POST routes (sign in, sign out)
Default cookie policy aims for the most restrictive policy appropriate for each cookie
When JSON Web Tokens are enabled, they are signed by default (JWS) with HS512
Use JWT encryption (JWE) by setting the option encryption: true (defaults to A256GCM)
Auto-generates symmetric signing and encryption keys for developer convenience
Features tab/window syncing and session polling to support short lived sessions
Attempts to implement the latest guidance published by Open Web Application Security Project

Advanced options allow you to define your own routines to handle controlling what accounts are allowed to sign in, for encoding and decoding JSON Web Tokens and to set custom cookie security policies and session properties, so you can control who is able to sign in and how often sessions have to be re-validated.

TypeScript

NextAuth.js comes with built-in types. For more information and usage, check out the TypeScript section in the documentation.

Example

Add API Route

// pages/api/auth/[...nextauth].js
import NextAuth from "next-auth"
import AppleProvider from "next-auth/providers/apple"
import GoogleProvider from "next-auth/providers/google"
import EmailProvider from "next-auth/providers/email"

export default NextAuth({
  secret: process.env.SECRET,
  providers: [
    // OAuth authentication providers
    AppleProvider({
      clientId: process.env.APPLE_ID,
      clientSecret: process.env.APPLE_SECRET,
    }),
    GoogleProvider({
      clientId: process.env.GOOGLE_ID,
      clientSecret: process.env.GOOGLE_SECRET,
    }),
    // Sign in with passwordless email link
    EmailProvider({
      server: process.env.MAIL_SERVER,
      from: "<no-reply@example.com>",
    }),
  ],
})

Add React Hook

The useSession() React Hook in the NextAuth.js client is the easiest way to check if someone is signed in.

import { useSession, signIn, signOut } from "next-auth/react"

export default function Component() {
  const { data: session } = useSession()
  if (session) {
    return (
      <>
        Signed in as {session.user.email} <br />
        <button onClick={() => signOut()}>Sign out</button>
      </>
    )
  }
  return (
    <>
      Not signed in <br />
      <button onClick={() => signIn()}>Sign in</button>
    </>
  )
}

Share/configure session state

Use the <SessionProvider> to allow instances of useSession() to share the session object across components. It also takes care of keeping the session updated and synced between tabs/windows.

import { SessionProvider } from "next-auth/react"

export default function App({
  Component, 
  pageProps: { session, ...pageProps }
}) {
  return (
    <SessionProvider session={session}>
      <Component {...pageProps} />
    </SessionProvider>
  )
}