Other storages are accessible from the client-side hence you just write an interceptor and write the token into Authorization Header. Charge à l’application cliente de stocker cette propriété, comme présenté précédemment lors du stockage du JWT dans le webstorage. My initial research revealed that some developers are also using this combination. For additional security, we must consider a few more things on the server side, such as: Token expiration validation. Cookies are less susceptible to XSS attacks provided it's HTTPOnly and the secure flag is set to true. In web, also we have “cookies”. Sous node.js : It's automatically sent in every HTTP request to your server. Démarrons de ce pas avec un introduction rapide à JWT. Bien sûr, si la page web a été bien développée, elle est censée être protégée de ce type d’attaque… Cependant, il est extrêmement fréquent aujourd’hui même pour les développeurs les plus aguerris, d’utiliser des librairies javascript trouvées ça et là sur Internet, et, soyons honnête, vous ne regardez jamais vraiment le code importé. After that the server-side handles the authentication. I create a JWT, encrypt the json object being sent back to the client, and package it into an HttpOnly cookie. Le token ainsi créé est envoyé au client lors d’un login avec succès et se présente sous cette forme. The HttpOnly tag will restrict users to manipulate the Cookie by JavaScript. If you set HttpOnly to true, and enforce an architectural pattern of limiting the JWT to cookies, you can effectively mitigate XSS. Vous continuez à surfer tranquillement sur le site, tout va bien, les requêtes sont authentifiées par le Cookie transmis automatiquement par le navigateur. For my use case, I needed to use a JWT that was used for authentication and authorization, couldn’t be stored in local or session storage, and inaccessible to any JS code. Using only HTTPOnly might not prevent an attack as an attacker might use XST (cross-site tracing) to retrieve the cookie via XSS + HTTP Trace. Even if the refresh token is exposed it could be used only once. An Approach to JWT Authentication July 7th, 2020 – by Alexander Dreith The Common Approach. Am I right? Documenter son code Angular avec angular-jsdoc, BetCity ou le besoin de gérer la haute disponibilité. Les champs obligatoires sont indiqués avec *. Ce qui nous permet de créer un token avec la méthode sign() et en passant en paramètre l’objet que nous souhaitons tokeniser, ici l’objet « user » qui est l’utilisateur correspondant aux identifiants renseignés lors de l’appel au endpoint que vous utilisez pour la connexion (ex: /login ou /connexion). CSRF est une attaque au cours de laquelle un site internet malicieux cherche à se faire passer pour le domaine qui est à l’origine du Cookie, et ainsi forcer le navigateur à lui envoyer ce Cookie de manière totalement transparente, à votre insu. Cette solution repose sur l’utilisation combinée de JWT et des Cookies HttpOnly. It depends on your needs. Just focus on X-Access-Token. The refresh token is sent in `jti` claim of jwt token, which is sent to client in HttpOnly cookie. Car comme vous le savez désormais (on ne le répétera jamais assez), le navigateur envoie automatiquement le Cookie au serveur, s’il détecte que le Cookie est lié au domaine de ce site. Best part of the cookies are you can manage them from server-side. Using JWT to securely exchange information between two servers En effet, nous allons modifier la PayLoad de notre JWT, en y ajoutant une « claim » (i.e propriété) custom : xsrfToken, un id aléatoirement généré. Whenever there is a request the XMLHttpRequest sends all the cookies to the server-side. (https://tools.ietf.org/html/rfc6749#section-1.5). If the JWT is placed in localStorage, the XSS vector isn't mitigated because localStorage can be read by client side script (which is kind of the point of localStorage, making it a less than ideal place for JWT's to live). Un jour vous recevez un mail d’un site se faisant passer pour simplx.fr. To overcome this issue, most developers resort to save the JWT token in a cookie thinking that HttpOnly and Secure can protect the cookie, at least from XSS attacks. // the response already set the token into browser's cookie. Content security policy. Pros. This special kind of cookie is more secure because we can’t access it using JavaScript, and as such it can’t be stolen by 3rd part scripts and used as a target for attacks. This method limits your exposure to CSRF and XSS attacks. But I am confused, if we store the JWT in httpOnly cookies how can we perform AJAX api calls (that require authorization) using fetch or axios, since we cannot read httpOnly cookies. I create a JWT, encrypt the json object being sent back to the client, and package it into an HttpOnly cookie. You can find the source code at end of the post. Les exemples que nous fournissons ici sont basées sur un développement full stack js (Angular en front, node.js en back). Excellent work! Utilisons donc les Cookies me direz vous ? Enregistrer mon nom, mon e-mail et mon site web dans le navigateur pour mon prochain commentaire. I remember the day when I was talking to a colleague about the httpOnly cookie flag and how it could be used in combination with JWT token-based authentication. To avoid the XSS attack, we can add a fingerprint: when creating JWT, server creates a random and unique cookie (fingerprint) and sent back to user. Excellent work! We’ll go over how Option 3 … Cela se fait via le même objet config du $httpProvider. eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MSwiZW1haWwiOiJmb3htYWNiZWFsQGhvdG1haWwuY29tIiwiZmlyc3RuYW1lIjoiTmljb2xhcyIsImxhc3RuYW1lIjoiRHV2YWwiLCJhY3RpdmUiOnRydWUsInByb2ZpbGVzIjpudWxsLCJidWlsZGluZ3MiOm51bGwsInhzcmZUb2tlbiI6IlhnQnR2ZFpGX1BXdEViaC1DZW53cVIyTiIsImlhdCI6MTQ3NDg4NTI0NiwiZXhwIjoxNDc1NDkwMDQ2fQ.pPTmz3ho5olARHYGn17xpbfBVrQW6_ezxNzOpVhjWLU. The below code shows a simple comparison with axios. Développement, Design, et autres sujets brûlants du numérique. So if I get it right the flow is: When the user send correct credentials to my backend, I sent back in response HttpOnly cookie with jwt token containing the refresh token in a jti claim En effet, nous allons modifier la PayLoad de notre JWT, en y ajoutant une « claim » (i.e propriété) custom : xsrfToken, un id aléatoirement généré. Note: If your Authentication Server is separated from your website. Web Cookies (Secure, HttpOnly, Same Site) The Express server will serve the React SPA from all routes, except those that begin with /api. Therefore, you just making things hard for the other people. For example, when a user logged in, you can put the user sensitive content into her/his cookies without handle it from client-side scripts. To mark a cookie as HttpOnly pass the attribute in the cookie: the client cannot read data stored in these cookies. If you're using httpOnly and secure cookies, that means your cookies cannot be accessed using JavaScript. Le navigateur croit avoir à faire à simplx.fr, il transmet alors le Cookie, et la tierce personne peut ainsi faire exécuter tout sorte de requête (suppression par exemple), et ce en votre nom, sans même que vous vous en aperceviez. Problème de sécurité avec le web storage, il est accessible par tout code javascript du même domaine et est donc sensible aux attaques par cross scripting (XSS attacks, une injection de javascript dans votre page web pour exécuter du code malveillant). I will use three cookie property with login. In that case, you should empower your configurations with the refresh token. Refresh tokens are issued to the client by the authorization server and are used to obtain a new access token when the current access token becomes invalid or expires, or to obtain additional access tokens with identical or narrower scope (access tokens may have a shorter lifetime and fewer permissions than authorized by the resource owner). Mais on renvoie aussi lors de la même requête de login, la propriété « xsrfToken » via le contenu de la réponse Http. Hi, I'm trying to write JWT authentication with refresh token. The cookie is successfully saved, but this approach doesn’t allow me to set some flags for the cookie like: Secure, and HttpOnly. You can change the SameSite property on cookies. La personne qui dispose de la clé secrète peut vérifier la validité du token, et décoder la deuxième partie, payload, qui contient les informations utiles. With this method, your front end app is on the same domain, and has a server, allowing you to secure cookies with HttpOnly, Secure, and Same Site options. session storage: can avoid CSRF, but potentially be attacked by XSS. After that XMLHttpRequest or Axios with withCredentials property will do the work. For other cases, you need to increase your security. Si vous voulez en savoir encore plus, ou que vous avez une solution encore plus sécurisée, n’hésitez pas à nous contacter pour en discuter. I remember the day when I was talking to a colleague about the httpOnly cookie flag and how it could be used in combination with JWT token-based authentication. Votre adresse de messagerie ne sera pas publiée. Most of the resources on Internet suggest to store JWT in httpOnly cookies. Now that things are working, I want to change a little bit how the code works and add the use of HTTPOnly cookies. Si un attaquant parvient à injecter du JS, il n’a certes pas directement accès au JWT mais a accès au token CSRF. JWT Token should have a short lifetime. Pour rappel pour ceux qui n’ont pas effectué leur homework ou qui ne savent pas taper REST dans leur moteur de recherche préféré QWANT(google is not your friend :). If you’re using httpOnly and secure cookies this means that your cookies cannot be accessed using JavaScript so even if an attacker can run JS on your site, they can't read your access token from the cookie. Pour le renvoyer par la suite avec chaque requête, on utilise le paramètre « Authorization » du header HTTP. So storing the token in a place where JavaScript can access it is a bad practice. As I mentioned before, localStorage, sessionStorage and in-memory storages are candidates for this kind of questions. It depends on your needs. Also, you will be avoided from XSS and XSRF attacks with HttpOnly and SameSite=Strict properties. La signature, qui correspond à la concaténation des deux parties ci dessus, encodé par l’algorithme défini dans le header et une clé secrète. Seule la personne qui dispose à la fois du Cookie, et de la valeur décodée de xsrfToken en webstorage peut être à l’origine de la requête, garantissant donc l’authenticité du message et de son auteur. Bienvenue en 2016, nous évoluons aujourd’hui dans un monde où tout n’est qu’API, le besoin d’interopérabilité entre des applications clientes toujours plus nombreuses et vos services a vu apparaître le  développement des « Web Services », protocole XML-RPC puis SOAP et nous voilà dans une époque où l’architecture REST (acronyme de Representational State Transfer) est reine. Refresh token mechanism. Le header, encodé en base 64, contenant le type d’algorithme utilisé pour hasher le contenu. This means, even if an attacker can run JS on your site, they can't read your access token from the cookie. La valeur de cette clé, selon la best practice, doit être défini à : Bearer + la valeur du token stocké en sessionStorage. The HttpOnly tag for Cookie is one of solutions to defend XSS. Actuellement, ma méthode d’authentification pour un site web fonctionne. Dans notre cas, nous utilisons la librairie node.js jsonwebtoken. Cette solution repose sur l’utilisation combinée de JWT et des Cookies HttpOnly. Note that cookies without the HttpOnly attribute are accessible on document.cookie from JavaScript in the browser. Nous vous proposons ici notre solution, éprouvée avec des projets actuellement en production. I would like to talk about the SPA client authentication. L’information partagée est principalement orientée authentification via JWT, mais l’utilisation de JWT seule n’offre pas un niveau de sécurité suffisant dans la plupart des cas. In this video I go through a few possibilities on how to use the JWT token. What I ended up implementing in one of my projects is .e.g. True}) set_access_cookies (resp, access_token) return resp, 200 # Because the JWTs are stored in an httponly cookie now, we cannot # log the user out by simply deleting the cookie in the frontend. Learn how you can store your JWT in memory instead of localStorage or a cookie for authentication. Option 2: Store your access token in httpOnly cookie: prone to CSRF but can be mitigated, a bit better in terms of exposure to XSS. La Payload, encodée en base 64, le contenu des informations à échanger entre le client et le serveur, en général les informations liées au profil utilisateur mais aussi un ensemble de « claims » jwt : Qui est la personne (sub, pour subject en anglais), ses accès (scope), l’expiration du token (exp) et qui est à l’origine de ce token (iss, pour issuer en anglais). Les tokens JWT sont un excellent moyen de communication, ils permettent d’échanger entre un serveur et différentes applications clientes des informations d’utilisateur et de rôles de manière stateless. His idea was enough interesting for me to start working on it. The httpOnly: true setting means that the cookie can’t be read using JavaScript but can still be sent back to the server in HTTP requests. 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