jwt-resource-server

Tools for synchronous (servlet-based) OpenID resource servers relying on use of Access Tokens for authorization. These come in the form of JSON Web Tokens (JWT) issued by Authorization Servers like Auth0 and Keycloak. Authorization Servers sign JWTs with private keys, resource servers then download the corresponding public keys from the Authorization Servers and validate the JWTs by verifying the signature.

Primer

Technically, this library deals with HTTP requests using the Authorization header. Example HTTP request:

GET /some/restricted/service/1
Accept: application/json
Authorization: Bearer eyJhbGciOiJIUzI1NiIsI.eyJzdWIIjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpM

where the Base64-encoded value is the token itself. For a valid token, the server could process the request and respond:

HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: 1024

Alternatively, the server might return HTTP 401 Unauthorized if the token was not accepted, or HTTP 403 Forbidden if the token did not contain the enough permissions.

Overview

Users of this library will benefit from:

• Robust multi-tenant JWT access-token validation
• Robust JWT access-token client
• Flexible JWT JUnit 5 test-support
• Spring Boot support for the above

In order to keep complexity (and risk) down, the library wraps existing third party libraries for low-level parsing, signature validation and authorization enforcement. Notable features:

• thread-safe sharing of keys (for signature verification) and access-tokens within each JVM
• proactive background refresh of keys and tokens
• keys and token health status (on last remote invocation)
• annotation-based token mocking with test method signature argument support
• open/closed endpoint filter, so that requests to closed endpoints can be proactively rejected before payload is unmarshalled

Async is not yet supported.

Project structure

• jwt-server - for handling incoming service calls (i.e. in your backend)
• jwt-client - for making outgoing service calls (i.e. support for obtaining a token first)
• jwt-test - JUnit 5 test support.
• examples - Example projects.

See documentation contained in each folder to get started. Or skip right to the examples.

License

European Union Public Licence v1.2.

History

• 4.2.4: Change log level for permission denied and authorization exceptions to INFO. StatusRuntimeException with INTERNAL status logs as ERROR, otherwise INFO.
• 4.2.3: Allow authorization matcher to specify ant type.
• 4.2.2: Bump dependencies
• 4.2.0 to 4.2.1: Refresh health indicators in the background, add even more logging.
• 4.1.7: Adjust health indicator logging.
• 4.1.6: Adjust health indicator timeout when multiple JWK sources + bump dependencies.
• 4.1.5: Add event listener to JWKs rate limiter, remove unused property.
• 4.1.4: Improve client builder empty string checks
• 4.1.2: Improve logging of JWK events, bump dependencies.
• 4.1.1: Improve GRPC exception handling configuration.
• 4.1.0: The JWT scope (or scp) claim will now be converted to GrantedAuthority using the default Spring approach of prefixing with SCOPE_. Add a bean NoopJwtAuthorityEnricher to disable scope being converted to authorities all together.
• 4.0.1: Dependency updates
• 4.0.0: Adjust gRPC MDC handling + enrich gRPC authentication from Auth0/Keycloak access token
• 3.1.0: Support for a generic JWT client type (by viliket)
• 3.0.x: Spring Boot 3 support
  • Auth0 artifacts replaced by Spring OAuth equivalents
  • Takes advantage of latest Nimbus Jose JWKs handling.
• 2.0.5-2.0.6: Ignore cookies as Apache did not accept the ones returned from Auth0 due to use of custom domain + bump dependencies
• 2.0.2-2.0.4: Maintenance release
• 2.0.0: Splits up the artifacts of web mvc (web) and reactive (webflux), respectively. Therefore, there are major renaming in some artifacts. For instance, if you are implementing jwt-spring-auth0, you should rename this to jwt-spring-auth0-web.
• 1.1.13: Support for WebClient (used in a synchronous way) in new jwt-client-spring-cloud artifact.
• 1.1.x: gRPC, eager caching, new health check tweaks
• 1.0.x: Initial release and adjustments for first use.