Performing this lookup on each and every request has an understandable impact on the overall latency of the system. The log_format directive defines a new format called jwt which extends the common log format with two additional fields, $jwt_header_alg and $jwt_claim_sub. With traditional API keys, this requires a lookup to match the API key with a set of attributes. The ability to cryptographically sign JWTs makes them ideal for use as authentication credentials. Weve added line breaks for readability (the actual JWT is a single string). exp The commercial version of NGINX, NGINX Plus, has built-in JWT handling features. If any of the checks fails, The first thing we do is specify the addresses of the servers that host the API endpoint in the upstream block. This configuration is helpful when NGINX is acting as a reverse-proxy server for a backend application server, for example, Tomcat or JBoss, where the authentication is to be performed by the web server. The proxy_set_header directive adds a HTTP header called APIClient which the API endpoint can easily consume. Create a JWT token and put it in the authorization header and make a request to Nginx: curl -H "authorization: Bearer {JWT}" {NGINX_SERVER} If any problems occurred check Nginx logs. Select Other. For example, with the following configuration NGINX Plus can validate the JWT sent with this curl command: Once youve configured NGINX Plus, and generated and verified a JWT as shown above, youre ready send the JWT to the API client developer and agree on the mechanism that will be used to submit the JWT with each API request. 500 (Internal Server Error) error. With NGINX Plus it is possible to control access to your resources using JWT authentication. NGINX Plus R15 and later can also control the Authorization Code Flow in OpenID Connect1.0, which enables integration with most major identity providers. NGINX Plus also supports the RS256 and EC256 signature algorithms that are defined in the standard. To avoid validation overhead, The auth_jwt directive defines the authentication realm that will be returned (along with a 401 status code) if authentication is unsuccessful. Learn how to use NGINX products to solve your technical challenges. A JWT is considered to be valid when the following conditions are met: In order to validate the signature with a key or to decrypt data, a JSON Web Key (key.jwk) should be created. API client authentication with a traditional API key. authentication. Theyre on by default for everybody else. Note each users username for step 2. Performing this lookup on each and every request has an understandable impact on the overall latency of the system. supports embedded variables: For nested claims and claims including a dot (.), The proxy_set_header directive adds an HTTP header called APIClient which the API endpoint can easily consume. This directive appeared in version 1.11.10. The module can be used for In this blog post, we describe how you can use NGINX Plus as an API gateway, providing a frontend to an API endpoint and using JWT to authenticate client applications. nginx will return the using the specified keys. In this example, we are setting the $jwt_status variable to 0 or 1 according to the value of the sub claim in the token (as captured in the $jwt_claim_sub variable). For more examples, refer to the NGINX documentation Setting up JWT Authentication. allows redefining the error code to 403. and assign the result to the. Usefull for authenticating against read only AD server without access to read write. Name matching starts from the top level of the JSON tree. In transmission, they look like the following. For arrays, the variable keeps a list of array elements separated by commas. Authentication. The values of three resulting variables are evaluated in the auth_jwt_require directive, and if the value of each variable is 1, the JWT will be accepted: In some cases the auth_jwt_require directive can be specified multiple times, for example, for the purpose of authentication and then for authorization. Since the release of R10, we've continued to increase functionality in each new release. identified by key names. In this example, were also using claim-based variables to provide API rate limiting per API client, instead of per IP address. Parameter value can contain variables. Get technical and business-oriented blogs that help you address key technology challenges. Learn how to deliver, manage, and protect your applications using NGINX products. NGINXPlus supports the HSxxx, RSxxx, and ESxxx signature algorithms that are defined in the standard. EdDSA (Ed25519 and Ed448 signatures) (1.15.7), A128CBC-HS256, A192CBC-HS384, A256CBC-HS512, dir- direct use of a shared symmetric key as the content encryption key, RSA-OAEP, RSA-OAEP-256, RSA-OAEP-384, RSA-OAEP-512 (1.21.0). JWS (signed), Without NGINX Plus to protect our API routes, we'd have to add a couple more dependencies, add some middleware to check and verify that the incoming request had a valid . Within the location block, we use the access_log directive to write logs with the values obtained from the validated JWT. To restrict user access with basic authentication, take the following steps: Add users using the NGINX Management Suite web interface. From time to time it may be necessary to revoke or reissue an API clients JWT. The ability to cryptographically sign JWTs makes them ideal for use as authentication credentials. Therefore the API endpoint does not need to implement any JWT processing logic. that contains JSON Web Token. the 401 error code is returned. Generally, the API endpoint does not validate API keys itself; instead, an API gateway handles the authentication process and routes each request to the appropriate endpoint. This article explains how to control authentication of your web resources using JWT authentication. URL of the IdPs OAuth 2.0 Token endpoint. The first thing we do is specify the addresses of the servers that host the API endpoint, in the upstream block. As an example API client, well use a quotation system application and create a JWT for the API client. Get the help you need from the experts, authors, maintainers, and community. First configure your Okta app in the Okta web GUI then fill in the proper fields that are not commented out in the NGINX example conf. Then, run okta apps create. URI to be redirected by the IdP after successful logout from the IdP. The limit_req_zone directive uses the JWT sub claim as the key for calculating rate limits, which are then applied to the location block by including the limit_req directive. Guide how to enable JWT validation on open source nginx server using ngx-http-auth-jwt-module - nginx.conf The header and payload are Base64encoded JSON objects, the encryption algorithm for the signature is specified by the alg header. IdPs client ID which is a public identifier for the client that is required for all OAuth flows. sets the URI where the subrequest will be sent to. Analytics cookies are off for visitors from the UK or EEA unless they click Accept or submit a form on nginx.com. The ngx_http_auth_jwt_module module (1.11.3) Test by making an authenticated request to the API gateway (in this example, the gateway is running on localhost). The location block specifies that any requests to URLs beginning with /products/ must be authenticated. This configuration example shows some of the advanced capabilities. In transmission they look like the following. Sets the variable to a JOSE header parameter For a detailed discussion of the directive, see Custom JWT Validation Rules in the blog announcing NGINX Plus R25. Deployers of APIs and microservices are also turning to the JWT standard for its simplicity and flexibility. Refer to the guide Restricting Access with HTTP Basic Authentication for more information. Finally, we provide the JWT subject as a new HTTP header when the request is proxied to the API endpoint. ngx_http_access_module, This directive appeared in version 1.15.6. and Explore the areas where NGINX can help your organization overcome specific technical challenges. Now we have everything we need to create the JWT, we follow these steps to correctly encode and sign it. By default, caching of keys is disabled. The following algorithms can be used for signing: JSON Web Encryption (JWE) - the contents of JWT is encrypted. Start and Enable Instance Manager and NGINX Plus (or NGINX). Extract JWT Payload into NGINX Variable [http/authorization/jwt] JSON Web Tokens (JWT) are a common way to authenticate to web applications. For example, OpenID Connect Core requires validation of iss (issuer), aud (audience), sub (subject) claims for ID token. The value HS256 in our example refers to HMACSHA256, which were using for all sample JWTs in this blog post. You need to create the JWT or use an identity provider (idP) to generate the JWT. The value HS256 in our example refers to HMAC SHA256, which were using for all sample JWTs in this blog post. Access phase. Specifying both directives at the same time will allow you to specify more than one source for keys. identified by key names. Combined with other API gateway capabilities, NGINX Plus enables you to deliver APIbased services with speed, reliability, scalability, and security. Deployers of APIs and microservices are also turning to the JWT standard for its simplicity and flexibility. The following table shows the authentication options for Instance Manager on NGINX Open Source and NGINX Plus. Test by making an authenticated request to the API gateway (in this example, the gateway is running on localhost). These are accessed by prefixing $jwt_header_ or $jwt_claim_ to the desired field (for example, $jwt_claim_sub for the sub claim). The sub (subject) field is our unique identifier for the full value in the name field. Select the default app name, or change it as you see fit. In case of an error, the 401 code will be displayed. Together with F5, our combined solution bridges the gap between NetOps and DevOps, with multi-cloud application services that span from code to customer. In this case the Nginx server has authorized the caller and performed a reverse proxy call to the backing service's endpoint. can be specified on the same level (1.21.1): If at least one of the specified keys cannot be loaded or processed, Published at DZone with permission of Liam Crilly, DZone MVB. Authentication and Content-Based Routing with JWTs and NGINX Plus. are available only after decryption which occurs during the Authenticating API Clients with JWT and NGINX Plus - NGINX With NGINX Plus as an API gateway, you can use JSON Web Tokens (JWTs) to control access to your APIs. JWTs can also be used as authentication credentials in their own right and are a better way to control access to webbased APIs than traditional API keys. Install the NGINX JavaScript module (njs). Try Red Hat's products and technologies without setup or configuration free for 30 days with this shared OpenShift and Kubernetes cluster . powered by Disqus. Learn more at nginx.com or join the conversation by following @nginx on Twitter. First, you need to install the nginx-plus-module-njs module for NGINX Plus. /etc/nginx/conf.d/nginx-manager-jwt.conf Skip to content Your Cookie Settings Hi Folks, I was referring lot of other articles on internet and seems that jwt authentication is only possible with Nginx plus version; wondering if this is possible with Nginx Open source version as well? . JSON Web Tokens are well suited to providing authenticated access to APIs. See the original article here. JWT claims. Lightning-fast application delivery and API management for modern app teams. A traditional API key is essentially a long and complex password that the client sends as an additional HTTP header on each and every request. As a sample API client, well use a quotation system application and create a JWT for the API client. and must start with a variable (1.21.7). Parameter value can contain variables. The full example of getting JWKs from a subrequest: During JWT verification, NGINX Plus automatically validates only nbf (not before) and exp (expires) claims. The auth_jwt directive defines the authentication realm that will be returned (along with a 401 status code) if authentication is unsuccessful. You can use JSON Web Token (JWT) Authentication with NGINX Plus and Instance Manager. To try JWT with NGINXPlus for yourself, start your free 30-day trial today or contactus to discuss your use cases. Therefore the API endpoint does not need to implement any JWT processing logic. Notice too that the nginx-jwt script has tacked on an extra response header called X-Auth-UserId that contains the value passed in the JWT payload's subject. We explain how to configure the gateway for JWT-based authentication, issue JWTs to API clients, rate limit, log claims from the JWT, and revoke JWTs. Hrm, it looks like nginx-jwt sets the ngx.HTTP_UNAUTHORIZED flag, so I'm not actually sure why that rewrite happens regardless. The module supports the following JSON Web PKCE is an OAuth 2.0 security extension for public clients on mobile devices or single page apps intended to avoid a malicious programme creeping into the same computer from intercepting the authorization code. This is particularly useful when multiple API clients are embedded in a single portal and cannot be differentiated by IP address. The following information is needed to configure the service: Table: OIDC Metadata via Well-Known Endpoints, Table: OIDC Custom Configuration for Well-Known Endpoints. Enables or disables caching of keys This means that we can very easily proxy the information contained within the JWT to the API endpoint without needing to implement JWT processing in the API itself. Learn how to protect your apps with NGINX and NGINX Plus. This configuration example shows some of the advanced capabilities. or signed and then encrypted and sets caching time for them. JWTs have three parts: a header, a payload, and a signature. GitHub. Append the encoded signature to the header and payload. and For instruction on how to limit access to features using role-based access control, see the Set Up RBAC tutorial. The JWT specification has been an important underpinning of OpenID Connect, providing a single signon token for the OAuth 2.0 ecosystem. Parameter value can contain variables. Using Nested JWT may be preferable over JWE because: in case of JWE, the target application/service needs to decrypt the token first, then verify the signature. the auth_jwt_claim_set directive should be used instead. In this process, we send the username and password to the authentication server. Native JWT support is available only in NGINXPlus, not NGINX Open Source. This directive appeared in version 1.21.4. The default value of the directive is signed, so for JWS, the directive can be omitted. For details, see Announcing NGINX Plus R15. Using JWT as the API key provides a highperformance alternative to traditional API keys, combining best practice authentication technology with a standardsbased schema for exchanging identity attributes. If desired, you can use separate .htpasswd files in different locations or restrict by IP addresses. Now we are ready to issue JWTs to our API clients. Within the location block, we use the access_log directive to write logs with the values obtained from the validated JWT. Native JWT support is available only in NGINX Plus, not open source NGINX. For example. sy007 (@sy007) 1 year, 8 months ago. If none of the directives are specified, JWS signature verification will be skipped. Learn how this can change the way your app handles authentication. Caching of keys obtained from variables is not supported. Choose Web and press Enter. For example, you can use the auth_jwt_key_cache directive for the above configuration, and enable the JWT key caching for one hour. This can be done with the auth_jwt_key_file and/or auth_jwt_key_request directives. F5, Inc. is the company behind NGINX, the popular open source project. NGINX Plus can also obtain the JWT from a cookie or query string parameter; to configure this, include the token= parameter to the auth_jwt directive. URL of the IdPs application. Join the DZone community and get the full member experience. The iss field describes the issuer of the JWT, which is useful if your API gateway also accepts JWTs from thirdparty issuers or a centralized identity management system. Note that if the auth_jwt_key_request or auth_jwt_key_file are configured dynamically with variables, auth_jwt_key_cache cannot be used. The value can contain text, variables, and their combination, , JSON Web Token (JWT) NGINX Plus Release 10 introduced support for offloading authentication from web and API services with JSON Web Tokens (JWTs, pronounced "jots"). Variable values for tokens encrypted with JWE URL of the IdPs OAuth 2.0 Authorization endpoint. Commands and encoded values appear on multiple lines only for readability; each one is actually typed as or appears on a single line: The curl command in Step 5 sends the JWT to NGINX Plus in the form of a Bearer Token, which is what NGINX Plus expects by default. This becomes increasingly valuable as the number of API endpoints increases. JWT Auth - WordPress JSON Web Token Authentication; Frequently Asked Questions; Support Threads; The iss field describes the issuer of the JWT, which is useful if your API gateway also accepts JWTs from thirdparty issuers or a centralized identity management system. implements client authorization by validating the provided The header and payload are Base64encoded JSON objects. Specify the path to the JSON Web Key file that will be used to verify JWT signature or decrypt JWT content, depending on what you are using. Privacy Notice. This deactivation will work even if you later click Accept or submit a form. A common way to authenticate an API client (the remote software client requesting API resources) is through a shared secret, generally referred to as an APIkey. Finally, the kid (Key ID) field defines a serial number for this JSON Web Key, here 0001, which allows us to support multiple keys in the same file (named by the auth_jwt_key_file directive) and manage the lifecycle of those keys and the JWTs signed with them. In this blog post we describe how to use NGINXPlus as an API gateway, providing a frontend to an API endpoint and using JWTs to authenticate client applications. Sign the header and payload with our symmetric key and Base64URLencode the signature. Open the OIDC configuration file /etc/nms/nginx/oidc/openid_configuration.conf for editing and update the placeholder values with the information for your identity provider (See variable The API endpoint grants access to the requested resource if the supplied API key is in the list of valid keys. The sub (subject) field is our unique identifier for the full value in the name field. For the API client developer, they are just as easy to handle as traditional API keys, and they provide the API gateway with identity information that would otherwise require a database lookup. Hi there, . NGINX Plus provides support for JWT authentication and sophisticated configuration solutions based on the information contained within the JWT itself. JWT is data format for user information in the OpenID Connect standard, which is the standard identity layer on top of the OAuth 2.0 protocol. One of the primary advantages of JWTs as authentication credentials is that they convey claims, which represent entities associated with the JWT and its payload (its issuer, the user to whom it was issued, and the intended recipient, for example).
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