dropwizard-api-key-bundle

A Dropwizard bundle that provides a simple way to manage API keys for callers of your service. The bundle provides support for authentication only; authorization is supported by optionally providing an Authorizer as documented below.

[] (http://travis-ci.org/dropwizard-bundles/dropwizard-api-key-bundle)

Getting Started

Just add this maven dependency to get started:

<dependency>
  <groupId>io.dropwizard-bundles</groupId>
  <artifactId>dropwizard-api-key-bundle</artifactId>
  <version>1.0.0</version>
</dependency>

If you only need authentication and a default Principal implementation add the default version of the bundle to your environment:

public class MyApplication extends Application<MyConfiguration> {
  @Override
  public void initialize(Bootstrap<MyConfiguration> bootstrap) {
    bootstrap.addBundle(new ApiKeyBundle<>());
  }

  @Override
  public void run(MyConfiguration cfg, Environment env) throws Exception {
    // ...
  }
}

If you need to provide an Authorizer or a different Principal (extending type), or both, add the bundle to your environment and provide the type extending the Principal interface, an implementation of the Authorizer and PrincipalFactory as appropriate:

public class MyApplication extends Application<MyConfiguration> {
  @Override
  public void initialize(Bootstrap<MyConfiguration> bootstrap) {
    bootstrap.addBundle(new PrincipalApiKeyBundle<>(User.class, new PrincipalFactory<User>() {
      @Override
      public User create(String name) {
        // Do something interesting...
        return new User(name);
      }}, new Authorizer<User>() {
        @Override
        public boolean authorize(User user, String role) {
          return user.getName().equals("application-1") && role.equals("ADMIN");
        }
    }));
  }

  @Override
  public void run(MyConfiguration cfg, Environment env) throws Exception {
    // ...
  }
}

Additionally you can also pass an UnauthorizedHandler when creating the bundle, which is useful if you need to customize the unauthorized response (e.g. type or entity).

You will also need to make your MyConfiguration class implement ApiKeyBundleConfiguration in order to provide the bundle with the necessary information it needs to know your API keys.

public class MyConfiguration implements ApiKeyBundleConfiguration {
  @Valid
  @NotNull
  @JsonProperty("authentication")
  private final ApiKeyConfiguration apiKeyConfiguration = null;

  /**
   * Return the API key configuration.
   */
  @Override
  public ApiKeyConfiguration getApiKeyConfiguration() {
    return apiKeyConfiguration;
  }
}

Now you can use API key based authentication in your application by declaring a method on a resource that has an @Auth annotated Principal parameter (or an extending type). See the Dropwizard Authentication documentation for more details. The name of the Principal will be the name of the application that made the request if the authentication process was successful.

As far as configuration goes you can define your API keys, and roles for those applications in your application's config file. Assuming, like in the above example, you called your API key configuration element authentication then you can use a config file like this:

authentication:
  basic-http:
    cache-spec: maximumSize=1000, expireAfterAccess=10m
    realm: MyApplication
    keys:
      application-1: api-key-1
      application-2: api-key-2
    roles:
      application-1:
        - admin
        - user
      application-2:
        - user