react-oauth2-code-pkce ·

React package for OAuth2 Authorization Code flow with PKCE

Adhering to the RFCs recommendations, cryptographically sound, and with zero dependencies!

What is OAuth2 Authorization Code Flow with Proof Key for Code Exchange?

Short version;
The modern and secure way to do authentication for mobile and web applications!

Long version;
https://oauth.net/2/pkce/
https://datatracker.ietf.org/doc/html/rfc7636

Features

• Authorization provider-agnostic. Works equally well with all OAuth2 authentication servers following the OAuth2 spec
• Supports OpenID Connect (idTokens)
• Pre- and Post-login callbacks
• Session expired callback
• Silently refreshes short-lived access tokens in the background
• Decodes JWT's
• A total of ~440 lines of code, easy for anyone to audit and understand

Example

import { AuthContext, AuthProvider, TAuthConfig } from "react-oauth2-code-pkce"

const authConfig: TAuthConfig = {
  clientId: 'myClientID',
  authorizationEndpoint: 'https://myAuthProvider.com/auth',
  tokenEndpoint: 'https://myAuthProvider.com/token',
  redirectUri: 'http://localhost:3000/',
  scope: 'someScope openid',
}

const UserInfo = (): JSX.Element => {
    const {token, tokenData} = useContext<IAuthContext>(AuthContext)

    return <>
        <h4>Access Token</h4>
        <pre>{token}</pre>
        <h4>User Information from JWT</h4>
        <pre>{JSON.stringify(tokenData, null, 2)}</pre>
    </>
}

ReactDOM.render(<AuthProvider authConfig={authConfig}>
        <UserInfo/>
    </AuthProvider>
    , document.getElementById('root'),
)

For more advanced examples, see ./examples/.
For instance, it's recommended to add a "Session expired"-callback like so:
onRefreshTokenExpire: (event) => window.confirm('Session expired. Refresh page to continue using the site?') && event.login(),.

Install

The package is available on npmjs.com here; https://www.npmjs.com/package/react-oauth2-code-pkce

npm install react-oauth2-code-pkce

IAuthContext values

The IAuthContext interface that the AuthContext returns when called with useContext() provides these values;

interface IAuthContext {
  // The access token. This is what you will use for authentication against protected API's
  token: string
  // An object with all the properties encoded in the token (username, email, etc.)
  tokenData?: TTokenData
  // Login the user
  login: () => void  
  // Logout the user from the auth provider
  logOut: () => void
  // Keeps any errors that occured during login or token fetching/refreshing. 
  error: string | null
  // The idToken, if it was returned along with the access token
  idToken?: string
  // If the <AuthProvider> is done fetching tokens or not. Usefull for controlling page rendering
  loginInProgress: boolean
}

All configuration parameters

The <AuthProvider> takes a config object that supports these parameters;

type TAuthConfig = {
  // Id of your app at the authentication provider
  clientId: string  // Required
  // URL for the authentication endpoint at the authentication provider
  authorizationEndpoint: string  // Required
  // URL for the token endpoint at the authentication provider
  tokenEndpoint: string  // Required
  // Which URL the auth provider should redirect the user after loging out
  redirectUri: string  // Required
  // Which scopes to request for the auth token
  scope?: string  // default: ''
  // Which URL to call for logging out of the auth provider
  logoutEndpoint?: string  // default: null
  // Should be used by the auth provider to decide which URL to redirect
  // the user to after logout
  logoutRedirect?: string  // default: null
  // Optionally provide a callback function to run _before_ the
  // user is redirected to the auth server for login
  preLogin?: () => void  // default: () => null
  // Optionally provide a callback function to run _after_ the
  // user has been redirected back from the auth server
  postLogin?: () => void  // default: () => null
  // Optional callback function for the 'refreshTokenExpired' event.
  // You likely want to display a message saying the user need to login again. A page refresh is enough.
  onRefreshTokenExpire?: (event: TRefreshTokenExpiredEvent) => void  // default: undefined
  // Whether or not to decode the access token (should be set to 'false' if the access token is not a JWT (e.g. from Github))
  // If `false`, 'tokenData' will be 'undefined' from the <AuthContext>
  decodeToken?: boolean  // default: true
  // By default, the package will automatically redirect the user to the login server if not already logged in.
  // If set to false, you need to call the "login()" function to login (e.g. with a "Login" button)
  autoLogin?: boolean  // default: true
  // Can be used to provide any non-standard parameters to the authentication request
  extraAuthParameters?: { [key: string]: string | boolean | number }  // default: null
  // Can be used to provide any non-standard parameters to the token request
  extraTokenParameters?: { [key: string]: string | boolean | number } // default: null
  // Superseded by 'extraTokenParameters' options. Will be deprecated in 2.0
  extraAuthParams?: { [key: string]: string | boolean | number }  // default: null
}

Known issues

The page randomly refreshes in the middle of a session

This will happen if you haven't provided a callback-function for the onRefreshTokenExpire config parameter, and the refresh token expires. You probably want to implement some kind of "alert/message/banner", saying that the session has expired and that the user needs to login again. Either by refreshing the page, or clicking a "Login-button".

After redirect back from auth provider with ?code, no token request is made

If you are using libraries that intercept any fetch()-requests made. For example @tanstack/react-query. That can cause issues for the AuthProviders token fetching. This can be solved by not wrapping the <AuthProvider> in any such library.

Develop

1. Update the 'authConfig' object in src/index.js with config from your authorization server and application
2. Install node_modules -> $ yarn install
3. Run -> $ yarn start

Contribute

You are welcome to create issues and pull requests :)