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Jakarta Security with Tomcat tomcat-users.xml identity store

TomEE has its own independent Jakarta Security implementation https://eclipse-ee4j.github.io/security-api/ .

Jakarta Security defines a standard for creating secure Jakarta EE applications in modern application paradigms. It defines an overarching (end-user targeted) Security API for Jakarta EE Applications.

Jakarta Security builds on the lower level Security SPIs defined by Jakarta Authentication and Jakarta Authorization, which are both not end-end targeted.

This example focuses in showing how to leverage Jakarta Security in TomEE with Tomcat’s tomcat-users.xml. TomEE out of the box supports it as an identity store.

Implement a simple JAX-RS application

This movie example has 2 resources, one of them MovieAdminResource is a protected resource to ensure only admin users can add or delete movies.

<web-app
  xmlns="http://xmlns.jcp.org/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
  version="3.1"
>

  <!-- Security constraints  -->

  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Protected admin resource/url</web-resource-name>
      <url-pattern>/api/movies/*</url-pattern>
      <http-method-omission>GET</http-method-omission>
    </web-resource-collection>
    <auth-constraint>
      <role-name>admin</role-name>
    </auth-constraint>
  </security-constraint>

</web-app>

Defining identity store and authentication mechanism

Jakarta Security requires 2 things to authenticate a user

  • the identity store (aka tomcat-users.xml in this case): this is basically where users are stored with their user name, password, and the roles

  • the authentication mechanism: how the credentials are passed in.

In this example, we want to use tomcat-users.xml identity store and basic authentication. We can define that in the resource itself using 2 annotations

@Path("/movies")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
@TomcatUserIdentityStoreDefinition
@BasicAuthenticationMechanismDefinition
@ApplicationScoped
public class MovieAdminResource {

    private static final Logger LOGGER = Logger.getLogger(MovieAdminResource.class.getName());

    @Inject
    private MovieStore store;

    // JAXRS security context also wired with Jakarta Security
    @Context
    private jakarta.ws.rs.core.SecurityContext securityContext;

    @POST
    public Movie addMovie(final Movie newMovie) {
        LOGGER.info(getUserName() + " adding new movie " + newMovie);
        return store.addMovie(newMovie);
    }

    // See source file for full content

    private String getUserName() {
        if (securityContext.getUserPrincipal() != null) {
            return String.format("%s[admin=%s]",
                                 securityContext.getUserPrincipal().getName(),
                                 securityContext.isUserInRole("admin"));
        }

        return null;
    }

}

IMPORTANT:

In TomEE, Jakarta Security is wired in all layers, you can use

  • jakarta.ws.rs.core.SecurityContext#getUserPrincipal and isUserInRole to get the User Principal and check if the user has a given role

  • jakarta.security.enterprise.SecurityContext#getCallerPrincipal and isCallerInRole to get the Caller Principal (notice the difference in terms of naming) and check if a caller has a given role

  • jakarta.servlet.http.HttpServletRequest#getUserPrincipal and isUserInRole

  • jakarta.ejb.SessionContext#getCallerPrincipal and isCallerInRole

  • the Subject from the PolicyContext but this is less used

A lot of different APIs to retrieve the principal and check whereas it has a given role. It’s all wired in and consistent in TomEE. No special configuration is needed.

Finally, MovieResource does not require any authentication or user permissions, but for logging purposes in this test, it will use the Jakarta Security SecurityContext to grab the caller principal and do some role checks.

Add users to the regular tomcat-users.xml

The file location is by default ${catalina.base}/conf. The file can be located anywhere. If you are not using the default location, make sure to update the server.xml accordingly.

<tomcat-users>
  <user name="tomcat" password="tomcat" roles="tomcat"/>
  <user name="user" password="user" roles="user"/>

  <user name="tom" password="secret1" roles="admin,manager"/>
  <user name="emma" password="secret2" roles="admin,employee"/>
  <user name="bob" password="secret3" roles="admin"/>
</tomcat-users>

Running

Were we to run the above Main class or Test Case we’d see output like the following:

INFOS:      Service URI: http://localhost:56147/api/movies                      -> Pojo org.superbiz.movie.MovieAdminResource
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:            DELETE http://localhost:56147/api/movies/{id}                 ->      Movie deleteMovie(int)
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:              POST http://localhost:56147/api/movies                      ->      Movie addMovie(Movie)
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:      Service URI: http://localhost:56147/api/movies                      -> Pojo org.superbiz.movie.MovieResource
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:               GET http://localhost:56147/api/movies                      ->      List<Movie> getAllMovies()
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:               GET http://localhost:56147/api/movies/{id}                 ->      Movie getMovie(int)
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:      Service URI: http://localhost:56147/api/openapi                     -> Pojo org.apache.geronimo.microprofile.openapi.jaxrs.OpenAPIEndpoint
juin 15, 2021 3:48:32 PM org.apache.openejb.server.cxf.rs.CxfRsHttpListener logEndpoints
INFOS:               GET http://localhost:56147/api/openapi                     ->      OpenAPI get()
juin 15, 2021 3:48:32 PM sun.reflect.DelegatingMethodAccessorImpl invoke
INFOS: Deployment of web application directory [/private/var/folders/03/fjcmr3cs2rnbtfcqd9w1nntc0000gn/T/temp2373416631427015263dir/apache-tomee/webapps/ROOT] has finished in [15,655] ms
juin 15, 2021 3:48:32 PM sun.reflect.DelegatingMethodAccessorImpl invoke
INFOS: Starting ProtocolHandler ["http-nio-56147"]
juin 15, 2021 3:48:32 PM sun.reflect.DelegatingMethodAccessorImpl invoke
INFOS: Server startup in [15904] milliseconds
juin 15, 2021 3:48:32 PM sun.reflect.DelegatingMethodAccessorImpl invoke
INFOS: Full bootstrap in [22621] milliseconds
juin 15, 2021 3:48:33 PM org.superbiz.movie.MovieAdminResource addMovie
INFOS: tom[admin=true] adding new movie Movie{title='Shanghai Noon', director='Tom Dey', genre='Comedy', id=7, year=2000}
juin 15, 2021 3:48:34 PM org.superbiz.movie.MovieResource getAllMovies
INFOS: tomcat[admin=false] reading movies
juin 15, 2021 3:48:34 PM org.superbiz.movie.MovieResource getAllMovies
INFOS: null reading movies
juin 15, 2021 3:48:34 PM org.superbiz.movie.MovieResource getAllMovies
INFOS: emma[admin=true] reading movies
juin 15, 2021 3:48:34 PM org.superbiz.movie.MovieResource getMovie
INFOS: bob[admin=true] reading movie 2 / Movie{title='Starsky & Hutch', director='Todd Phillips', genre='Action', id=2, year=2004}

APIs Used