![]() ![]() If you’d like to see how to build a real app using token authentication in Node, keep reading. Build a Simple App Using Okta for Token Authentication in Node + Express If you’d like to learn more about how to use nJWT, we’ve written a thorough article on the topic you should check out. One helpful tool is nJWT – a popular JavaScript library for working with JSON Web Tokens directly. If you don’t want to use Passport, or if you are building an application that isn’t based on connect-style middleware, you may need to implement token authentication yourself. Add Token Authentication into Your Node + Express App Manually ![]() If you’d like to start handling token authentication with Passport, I recommend you check out the official documentation. It has a comprehensive set of strategies (authentication mechanisms) support authentication using a username and password, Facebook, Twitter, etc. It’s extremely flexible and modular and can be unobtrusively dropped into any Express-based web application. Passport is a popular authentication middleware for Node applications. You can use an authentication middleware like Passport, or implement it yourself, manually. There are many ways to incorporate token authentication into your Node apps. You can use jsonwebtoken.io to play around with JSON Web Tokens and encode and decode them! Token Authentication in Node + Express This signature field is used by the issuer (usually the web server) to validate the token’s integrity and ensure it hasn’t been tampered with or edited by a third party. It contains information describing the type of the token and the signing algorithm being used, such as HMAC, SHA256, or RSA. The JWT header is a Base64URL-encoded JSON object. These sections represent the JWT header, payload, and signature, respectively. While this may look complicated and unreadable at first glance, it isn’t actually all that tricky! JWTs consist of three parts, separated by dots (. Here’s what a typical JWT might look like in it’s compacted, URL-safe form:Į6Pgrup6hM08oSqDPd1JrZSDIH_blD5S20c2hQQ3D3RZyhNKMnYclyus_mo-H-mS-Ak3YzM8S0JwZ8m3Vid4smW953peBMnmBNotAE-yE0toc2dIUG3BWQR34hah253bKmp17Yh6bWGwH60oQxnuM_NVUpa-NJMBc6-Mu5ra0lKfr60ne9-jKVFcavd9ZnVTLiug_sXFlhxgaQm4V_hhcvcLSwCXTiIcQsJkI0rP7WuVvjYVyK_sPeW3A44_T5qhyDR_E_mk1rHORlkMYGPg34mcwob5iA7alNZOnzN_7ApcbylDbK5KS1umBqqevtghEyjOEWQQmQ JWTs are the most popular type of tokens and are often what people mean when they refer to “token authentication” in general. JWTs are always cryptographically signed (sometimes encrypted) and can be signed using a secret key (symmetrical) or a public/private key pair (asymmetrical). JSON Web Tokens (JWTs) are an open standard ( learn more about JWTs here) that define a secure way to transmit information between parties using a JSON object. Tokens contain embedded user data that is used to identify and authenticate the user. Here’s a visualization of what the flow typically looks like:īefore we talk about JSON Web Tokens, let’s clarify some terms:Īuthentication is the process of verifying a user’s identity.Ī token is an object that can be used to authenticate a user to a server. This means you may not need to maintain a session store. The benefit of this approach is that tokens contain embedded information about the user, so the website can receive the token and discover who the user is and what permissions they have without necessarily needing to talk to a central database. The website will validate the token and use it to figure out who the user is.When the user makes subsequent requests to the website, their token will be sent along with their request.The website generates a token for the user. ![]() A user supplies their email address and password to the website (their credentials).The way this works in the context of web authentication is like so: Token authentication is a way to authenticate users into an application using a temporary token (typically a JSON Web Token) instead of actual credentials. ![]()
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