Make first pass at new OAuth-aware server authentication framework

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=147081745

java/google/registry/config/RegistryConfig.java

@@ -23,6 +23,7 @@ import com.google.common.base.Optional;
 import com.google.common.base.Supplier;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.net.HostAndPort;
 import dagger.Module;
 import dagger.Provides;
@@ -904,6 +905,44 @@ public final class RegistryConfig {
       return CONFIG_SETTINGS.get();
     }
 
+    /**
+     * Provides the OAuth scopes to check for on access tokens.
+     *
+     * <p>This list should be a superset of the required OAuth scope set provided below.
+     *
+     * <p>If we feel the need, we could define additional fixed scopes, similar to the Java remote
+     * API, which requires at least one of:
+     *
+     * <ul>
+     *   <li>https://www.googleapis.com/auth/appengine.apis</li>
+     *   <li>https://www.googleapis.com/auth/cloud-platform</li>
+     * </ul>
+     */
+    @Provides
+    @Config("availableOauthScopes")
+    public static ImmutableSet<String> provideAvailableOauthScopes() {
+      return ImmutableSet.of("https://www.googleapis.com/auth/userinfo.email");
+    }
+
+    /**
+     * Provides the required OAuth scopes for simply authenticating.
+     *
+     * <p>This set contains the scopes which must be present to authenticate a user. It should be a
+     * subset of the scopes we request from the OAuth interface, provided above.
+     */
+    @Provides
+    @Config("requiredOauthScopes")
+    public static ImmutableSet<String> provideRequiredOauthScopes() {
+      return ImmutableSet.of("https://www.googleapis.com/auth/userinfo.email");
+    }
+
+    /** Provides the allowed OAuth client IDs (could be multibinding). */
+    @Provides
+    @Config("allowedOauthClientIds")
+    public static ImmutableSet<String> provideAllowedOauthClientIds() {
+      return ImmutableSet.of("PUT.YOUR.PROXY.CLIENT.ID.HERE", "PUT.YOUR.REGTOOL.CLIENT.ID.HERE");
+    }
+
     /**
      * Returns the help path for the RDAP terms of service.
      *

java/google/registry/module/backend/BUILD

@@ -31,6 +31,7 @@ java_library(
         "//java/google/registry/rde/imports",
         "//java/google/registry/request",
         "//java/google/registry/request:modules",
+        "//java/google/registry/request/auth",
         "//java/google/registry/tmch",
         "//java/google/registry/util",
         "@com_google_appengine_api_1_0_sdk",

java/google/registry/module/backend/BackendComponent.java

@@ -39,6 +39,7 @@ import google.registry.request.Modules.URLFetchServiceModule;
 import google.registry.request.Modules.UrlFetchTransportModule;
 import google.registry.request.Modules.UseAppIdentityCredentialForGoogleApisModule;
 import google.registry.request.Modules.UserServiceModule;
+import google.registry.request.auth.AuthModule;
 import google.registry.util.SystemClock.SystemClockModule;
 import google.registry.util.SystemSleeper.SystemSleeperModule;
 import javax.inject.Singleton;
@@ -48,6 +49,7 @@ import javax.inject.Singleton;
 @Component(
     modules = {
         AppIdentityCredentialModule.class,
+        AuthModule.class,
         BackendRequestComponentModule.class,
         BigqueryModule.class,
         ConfigModule.class,

java/google/registry/module/backend/BackendRequestHandler.java

@@ -16,6 +16,7 @@ package google.registry.module.backend;
 
 import com.google.appengine.api.users.UserService;
 import google.registry.request.RequestHandler;
+import google.registry.request.auth.RequestAuthenticator;
 import javax.inject.Inject;
 import javax.inject.Provider;
 
@@ -25,7 +26,8 @@ public class BackendRequestHandler
 
   @Inject BackendRequestHandler(
       Provider<BackendRequestComponent.Builder> componentBuilderProvider,
-      UserService userService) {
-    super(componentBuilderProvider, userService);
+      UserService userService,
+      RequestAuthenticator requestAuthenticator) {
+    super(componentBuilderProvider, userService, requestAuthenticator);
   }
 }

java/google/registry/module/frontend/BUILD

@@ -18,6 +18,7 @@ java_library(
         "//java/google/registry/rdap",
         "//java/google/registry/request",
         "//java/google/registry/request:modules",
+        "//java/google/registry/request/auth",
         "//java/google/registry/ui",
         "//java/google/registry/ui/server/registrar",
         "//java/google/registry/util",

java/google/registry/module/frontend/FrontendComponent.java

@@ -29,6 +29,7 @@ import google.registry.request.Modules.ModulesServiceModule;
 import google.registry.request.Modules.UrlFetchTransportModule;
 import google.registry.request.Modules.UseAppIdentityCredentialForGoogleApisModule;
 import google.registry.request.Modules.UserServiceModule;
+import google.registry.request.auth.AuthModule;
 import google.registry.ui.ConsoleConfigModule;
 import google.registry.util.SystemClock.SystemClockModule;
 import google.registry.util.SystemSleeper.SystemSleeperModule;
@@ -39,6 +40,7 @@ import javax.inject.Singleton;
 @Component(
     modules = {
         AppIdentityCredentialModule.class,
+        AuthModule.class,
         BraintreeModule.class,
         ConfigModule.class,
         ConsoleConfigModule.class,

java/google/registry/module/frontend/FrontendRequestHandler.java

@@ -16,6 +16,7 @@ package google.registry.module.frontend;
 
 import com.google.appengine.api.users.UserService;
 import google.registry.request.RequestHandler;
+import google.registry.request.auth.RequestAuthenticator;
 import javax.inject.Inject;
 import javax.inject.Provider;
 
@@ -25,7 +26,8 @@ public class FrontendRequestHandler
 
   @Inject FrontendRequestHandler(
       Provider<FrontendRequestComponent.Builder> componentBuilderProvider,
-      UserService userService) {
-    super(componentBuilderProvider, userService);
+      UserService userService,
+      RequestAuthenticator requestAuthenticator) {
+    super(componentBuilderProvider, userService, requestAuthenticator);
   }
 }

java/google/registry/module/tools/BUILD

@@ -20,6 +20,7 @@ java_library(
         "//java/google/registry/monitoring/whitebox",
         "//java/google/registry/request",
         "//java/google/registry/request:modules",
+        "//java/google/registry/request/auth",
         "//java/google/registry/tools/server",
         "//java/google/registry/tools/server/javascrap",
         "//java/google/registry/util",

java/google/registry/module/tools/ToolsComponent.java

@@ -33,6 +33,7 @@ import google.registry.request.Modules.ModulesServiceModule;
 import google.registry.request.Modules.UrlFetchTransportModule;
 import google.registry.request.Modules.UseAppIdentityCredentialForGoogleApisModule;
 import google.registry.request.Modules.UserServiceModule;
+import google.registry.request.auth.AuthModule;
 import google.registry.util.SystemClock.SystemClockModule;
 import google.registry.util.SystemSleeper.SystemSleeperModule;
 import javax.inject.Singleton;
@@ -42,6 +43,7 @@ import javax.inject.Singleton;
 @Component(
     modules = {
         AppIdentityCredentialModule.class,
+        AuthModule.class,
         ConfigModule.class,
         CustomLogicFactoryModule.class,
         DatastoreServiceModule.class,

java/google/registry/module/tools/ToolsRequestHandler.java

@@ -16,6 +16,7 @@ package google.registry.module.tools;
 
 import com.google.appengine.api.users.UserService;
 import google.registry.request.RequestHandler;
+import google.registry.request.auth.RequestAuthenticator;
 import javax.inject.Inject;
 import javax.inject.Provider;
 
@@ -25,7 +26,8 @@ public class ToolsRequestHandler
 
   @Inject ToolsRequestHandler(
       Provider<ToolsRequestComponent.Builder> componentBuilderProvider,
-      UserService userService) {
-    super(componentBuilderProvider, userService);
+      UserService userService,
+      RequestAuthenticator requestAuthenticator) {
+    super(componentBuilderProvider, userService, requestAuthenticator);
   }
 }

java/google/registry/request/Action.java

@@ -14,6 +14,7 @@
 
 package google.registry.request;
 
+import google.registry.request.auth.Auth;
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -61,4 +62,7 @@ public @interface Action {
    * {@code web.xml} with {@code <role-name>*</role-name>}.
    */
   boolean requireLogin() default false;
+
+  /** Authentication settings. */
+  Auth auth() default @Auth;
 }

java/google/registry/request/BUILD

@@ -11,6 +11,7 @@ java_library(
         exclude = ["Modules.java"],
     ),
     deps = [
+        "//java/google/registry/request/auth",
         "//java/google/registry/security",
         "//java/google/registry/util",
         "@com_google_appengine_api_1_0_sdk",

java/google/registry/request/RequestHandler.java

@@ -27,6 +27,8 @@ import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
 
 import com.google.appengine.api.users.UserService;
 import com.google.common.base.Optional;
+import google.registry.request.auth.AuthResult;
+import google.registry.request.auth.RequestAuthenticator;
 import google.registry.util.FormattingLogger;
 import google.registry.util.TypeUtils.TypeInstantiator;
 import java.io.IOException;
@@ -77,6 +79,7 @@ public class RequestHandler<C, B extends RequestComponentBuilder<C, B>> {
   private final Router router;
   private final Provider<B> requestComponentBuilderProvider;
   private final UserService userService;
+  private final RequestAuthenticator requestAuthenticator;
 
   /**
    * Constructor for subclasses to create a new request handler for a specific request component.
@@ -89,22 +92,33 @@ public class RequestHandler<C, B extends RequestComponentBuilder<C, B>> {
    *     be used to construct new instances of the request component (with the required
    *     request-derived modules provided by this class)
    * @param userService an instance of the App Engine UserService API
+   * @param requestAuthenticator an instance of the RequestAuthenticator class
    */
-  protected RequestHandler(Provider<B> requestComponentBuilderProvider, UserService userService) {
-    this(null, requestComponentBuilderProvider, userService);
+  protected RequestHandler(
+      Provider<B> requestComponentBuilderProvider,
+      UserService userService,
+      RequestAuthenticator requestAuthenticator) {
+    this(null, requestComponentBuilderProvider, userService, requestAuthenticator);
   }
 
   /** Creates a new RequestHandler with an explicit component class for test purposes. */
   public static <C, B extends RequestComponentBuilder<C, B>> RequestHandler<C, B> createForTest(
-      Class<C> component, Provider<B> requestComponentBuilderProvider, UserService userService) {
+      Class<C> component,
+      Provider<B> requestComponentBuilderProvider,
+      UserService userService,
+      RequestAuthenticator requestAuthenticator) {
     return new RequestHandler<>(
-        checkNotNull(component), requestComponentBuilderProvider, userService);
+        checkNotNull(component),
+        requestComponentBuilderProvider,
+        userService,
+        requestAuthenticator);
   }
 
   private RequestHandler(
       @Nullable Class<C> component,
       Provider<B> requestComponentBuilderProvider,
-      UserService userService) {
+      UserService userService,
+      RequestAuthenticator requestAuthenticator) {
     // If the component class isn't explicitly provided, infer it from the class's own typing.
     // This is safe only for use by subclasses of RequestHandler where the generic parameter is
     // preserved at runtime, so only expose that option via the protected constructor.
@@ -112,6 +126,7 @@ public class RequestHandler<C, B extends RequestComponentBuilder<C, B>> {
         component != null ? component : new TypeInstantiator<C>(getClass()){}.getExactType());
     this.requestComponentBuilderProvider = checkNotNull(requestComponentBuilderProvider);
     this.userService = checkNotNull(userService);
+    this.requestAuthenticator = checkNotNull(requestAuthenticator);
   }
 
   /** Runs the appropriate action for a servlet request. */
@@ -152,9 +167,16 @@ public class RequestHandler<C, B extends RequestComponentBuilder<C, B>> {
       rsp.sendError(SC_FORBIDDEN, "Invalid " + X_CSRF_TOKEN);
       return;
     }
+    Optional<AuthResult> authResult =
+        requestAuthenticator.authorize(route.get().action().auth(), req);
+    if (!authResult.isPresent()) {
+      rsp.sendError(SC_FORBIDDEN);
+      return;
+    }
+
     // Build a new request component using any modules we've constructed by this point.
     C component = requestComponentBuilderProvider.get()
-        .requestModule(new RequestModule(req, rsp))
+        .requestModule(new RequestModule(req, rsp, authResult.get()))
         .build();
     // Apply the selected Route to the component to produce an Action instance, and run it.
     try {

java/google/registry/request/RequestModule.java

@@ -26,6 +26,7 @@ import dagger.Module;
 import dagger.Provides;
 import google.registry.request.HttpException.BadRequestException;
 import google.registry.request.HttpException.UnsupportedMediaTypeException;
+import google.registry.request.auth.AuthResult;
 import java.io.IOException;
 import java.util.Map;
 import javax.servlet.http.HttpServletRequest;
@@ -40,10 +41,18 @@ public final class RequestModule {
 
   private final HttpServletRequest req;
   private final HttpServletResponse rsp;
+  private final AuthResult authResult;
 
-  public RequestModule(HttpServletRequest req, HttpServletResponse rsp) {
+  public RequestModule(
+      HttpServletRequest req, HttpServletResponse rsp) {
+    this(req, rsp, AuthResult.NOT_AUTHENTICATED);
+  }
+
+  public RequestModule(
+      HttpServletRequest req, HttpServletResponse rsp, AuthResult authResult) {
     this.req = req;
     this.rsp = rsp;
+    this.authResult = authResult;
   }
 
   @Provides
@@ -66,6 +75,11 @@ public final class RequestModule {
     return rsp;
   }
 
+  @Provides
+  AuthResult provideAuthResult() {
+    return authResult;
+  }
+
   @Provides
   @RequestPath
   static String provideRequestPath(HttpServletRequest req) {

javatests/google/registry/request/BUILD

@@ -12,14 +12,15 @@ java_library(
     srcs = glob(["*.java"]),
     deps = [
         "//java/google/registry/request",
+        "//java/google/registry/request/auth",
         "//java/google/registry/security",
-        "//javatests/google/registry/security",
         "//javatests/google/registry/testing",
         "@com_google_appengine_api_1_0_sdk//:testonly",
         "@com_google_guava",
         "@com_google_guava_testlib",
         "@com_google_truth",
         "@com_googlecode_json_simple",
+        "@javax_inject",
         "@javax_servlet_api",
         "@joda_time",
         "@junit",

javatests/google/registry/request/RequestHandlerTest.java

@@ -23,15 +23,27 @@ import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
+import com.google.appengine.api.oauth.OAuthServiceFactory;
+import com.google.appengine.api.users.User;
 import com.google.appengine.api.users.UserService;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.testing.NullPointerTester;
 import google.registry.request.HttpException.ServiceUnavailableException;
+import google.registry.request.auth.AppEngineInternalAuthenticationMechanism;
+import google.registry.request.auth.Auth;
+import google.registry.request.auth.AuthLevel;
+import google.registry.request.auth.AuthResult;
+import google.registry.request.auth.LegacyAuthenticationMechanism;
+import google.registry.request.auth.OAuthAuthenticationMechanism;
+import google.registry.request.auth.RequestAuthenticator;
 import google.registry.testing.AppEngineRule;
 import google.registry.testing.InjectRule;
 import google.registry.testing.Providers;
 import google.registry.testing.UserInfo;
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import javax.inject.Inject;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.junit.After;
@@ -57,31 +69,31 @@ public final class RequestHandlerTest {
   public final InjectRule inject = new InjectRule();
 
   @Action(path = "/bumblebee", method = {GET, POST}, isPrefix = true)
-  public class BumblebeeTask implements Runnable {
+  public static class BumblebeeTask implements Runnable {
     @Override
     public void run() {}
   }
 
   @Action(path = "/sloth", method = POST, automaticallyPrintOk = true)
-  public class SlothTask implements Runnable {
+  public static class SlothTask implements Runnable {
     @Override
     public void run() {}
   }
 
   @Action(path = "/safe-sloth", method = {GET, POST}, xsrfProtection = true, xsrfScope = "vampire")
-  public class SafeSlothTask implements Runnable {
+  public static class SafeSlothTask implements Runnable {
     @Override
     public void run() {}
   }
 
   @Action(path = "/users-only", method = GET, requireLogin = true)
-  public class UsersOnlyAction implements Runnable {
+  public static class UsersOnlyAction implements Runnable {
     @Override
     public void run() {}
   }
 
   @Action(path = "/fail")
-  public final class FailTask implements Runnable {
+  public static final class FailTask implements Runnable {
     @Override
     public void run() {
       throw new ServiceUnavailableException("Set sail for fail");
@@ -89,7 +101,7 @@ public final class RequestHandlerTest {
   }
 
   @Action(path = "/failAtConstruction")
-  public final class FailAtConstructionTask implements Runnable {
+  public static final class FailAtConstructionTask implements Runnable {
     public FailAtConstructionTask() {
       throw new ServiceUnavailableException("Fail at construction");
     }
@@ -100,7 +112,57 @@ public final class RequestHandlerTest {
     }
   }
 
+  class AuthBase implements Runnable {
+    private final AuthResult authResult;
+
+    AuthBase(AuthResult authResult) {
+      this.authResult = authResult;
+    }
+
+    @Override
+    public void run() {
+      injectedAuthResult = authResult;
+    }
+  }
+
+  @Action(
+      path = "/auth/none",
+      auth = @Auth(
+          methods = {Auth.AuthMethod.INTERNAL},
+          minimumLevel = AuthLevel.NONE,
+          userPolicy = Auth.UserPolicy.IGNORED),
+      method = Action.Method.GET)
+  public class AuthNoneAction extends AuthBase {
+    @Inject AuthNoneAction(AuthResult authResult) {
+      super(authResult);
+    }
+  }
+
+  @Action(
+      path = "/auth/adminUserAnyMethod",
+      auth = @Auth(
+          methods = {Auth.AuthMethod.INTERNAL, Auth.AuthMethod.API, Auth.AuthMethod.LEGACY},
+          minimumLevel = AuthLevel.USER,
+          userPolicy = Auth.UserPolicy.ADMIN),
+      method = Action.Method.GET)
+  public class AuthAdminUserAnyMethodAction extends AuthBase {
+    @Inject AuthAdminUserAnyMethodAction(AuthResult authResult) {
+      super(authResult);
+    }
+  }
+
   public class Component {
+
+    private RequestModule requestModule = null;
+
+    public RequestModule getRequestModule() {
+      return requestModule;
+    }
+
+    public void setRequestModule(RequestModule requestModule) {
+      this.requestModule = requestModule;
+    }
+
     public BumblebeeTask bumblebeeTask() {
       return bumblebeeTask;
     }
@@ -124,12 +186,22 @@ public final class RequestHandlerTest {
     public FailAtConstructionTask failAtConstructionTask() {
       return new FailAtConstructionTask();
     }
+
+    public AuthNoneAction authNoneAction() {
+      return new AuthNoneAction(component.getRequestModule().provideAuthResult());
+    }
+
+    public AuthAdminUserAnyMethodAction authAdminUserAnyMethodAction() {
+      return new AuthAdminUserAnyMethodAction(
+          component.getRequestModule().provideAuthResult());
+    }
   }
 
   /** Fake Builder for the fake component above to satisfy RequestHandler expectations. */
-  public abstract static class Builder implements RequestComponentBuilder<Component, Builder> {
+  public abstract class Builder implements RequestComponentBuilder<Component, Builder> {
     @Override
     public Builder requestModule(RequestModule requestModule) {
+      component.setRequestModule(requestModule);
       return this;
     }
   }
@@ -158,9 +230,22 @@ public final class RequestHandlerTest {
   private final Component component = new Component();
   private final StringWriter httpOutput = new StringWriter();
   private RequestHandler<Component, Builder> handler;
+  private AuthResult injectedAuthResult = null;
+  private final User testUser = new User("test@example.com", "test@example.com");
+  private RequestAuthenticator requestAuthenticator;
 
   @Before
   public void before() throws Exception {
+    requestAuthenticator = new RequestAuthenticator(
+        new AppEngineInternalAuthenticationMechanism(),
+        ImmutableList.of(
+            new OAuthAuthenticationMechanism(
+                OAuthServiceFactory.getOAuthService(),
+                ImmutableSet.of("https://www.googleapis.com/auth/userinfo.email"),
+                ImmutableSet.of("https://www.googleapis.com/auth/userinfo.email"),
+                ImmutableSet.of("proxy-client-id", "regtool-client-id"))),
+        new LegacyAuthenticationMechanism(userService));
+
     // Initialize here, not inline, so that we pick up the mocked UserService.
     handler = RequestHandler.<Component, Builder>createForTest(
         Component.class,
@@ -171,7 +256,8 @@ public final class RequestHandlerTest {
             return component;
           }
         }),
-        userService);
+        userService,
+        requestAuthenticator);
     when(rsp.getWriter()).thenReturn(new PrintWriter(httpOutput));
   }
 
@@ -279,6 +365,7 @@ public final class RequestHandlerTest {
   @Test
   public void testNullness() {
     NullPointerTester tester = new NullPointerTester();
+    tester.setDefault(RequestAuthenticator.class, requestAuthenticator);
     tester.testAllPublicStaticMethods(RequestHandler.class);
     tester.testAllPublicInstanceMethods(handler);
   }
@@ -331,9 +418,56 @@ public final class RequestHandlerTest {
   @Test
   public void testMustBeLoggedIn_loggedIn_runsAction() throws Exception {
     when(userService.isUserLoggedIn()).thenReturn(true);
+    when(userService.getCurrentUser()).thenReturn(testUser);
     when(req.getMethod()).thenReturn("GET");
     when(req.getRequestURI()).thenReturn("/users-only");
     handler.handleRequest(req, rsp);
     verify(usersOnlyAction).run();
   }
+
+  @Test
+  public void testNoAuthNeeded_success() throws Exception {
+    when(req.getMethod()).thenReturn("GET");
+    when(req.getRequestURI()).thenReturn("/auth/none");
+    handler.handleRequest(req, rsp);
+    assertThat(injectedAuthResult).isNotNull();
+    assertThat(injectedAuthResult.authLevel()).isEqualTo(AuthLevel.NONE);
+    assertThat(injectedAuthResult.userAuthInfo()).isAbsent();
+  }
+
+  @Test
+  public void testAuthNeeded_notLoggedIn() throws Exception {
+    when(req.getMethod()).thenReturn("GET");
+    when(req.getRequestURI()).thenReturn("/auth/adminUserAnyMethod");
+    handler.handleRequest(req, rsp);
+    verify(rsp).sendError(403);
+    assertThat(injectedAuthResult).isNull();
+  }
+
+  @Test
+  public void testAuthNeeded_notAuthorized() throws Exception {
+    when(userService.isUserLoggedIn()).thenReturn(true);
+    when(userService.getCurrentUser()).thenReturn(testUser);
+    when(userService.isUserAdmin()).thenReturn(false);
+    when(req.getMethod()).thenReturn("GET");
+    when(req.getRequestURI()).thenReturn("/auth/adminUserAnyMethod");
+    handler.handleRequest(req, rsp);
+    verify(rsp).sendError(403);
+    assertThat(injectedAuthResult).isNull();
+  }
+
+  @Test
+  public void testAuthNeeded_success() throws Exception {
+    when(userService.isUserLoggedIn()).thenReturn(true);
+    when(userService.getCurrentUser()).thenReturn(testUser);
+    when(userService.isUserAdmin()).thenReturn(true);
+    when(req.getMethod()).thenReturn("GET");
+    when(req.getRequestURI()).thenReturn("/auth/adminUserAnyMethod");
+    handler.handleRequest(req, rsp);
+    assertThat(injectedAuthResult).isNotNull();
+    assertThat(injectedAuthResult.authLevel()).isEqualTo(AuthLevel.USER);
+    assertThat(injectedAuthResult.userAuthInfo()).isPresent();
+    assertThat(injectedAuthResult.userAuthInfo().get().user()).isEqualTo(testUser);
+    assertThat(injectedAuthResult.userAuthInfo().get().oauthTokenInfo()).isAbsent();
+  }
 }

javatests/google/registry/testing/FakeUserService.java

@@ -0,0 +1,75 @@
+// Copyright 2017 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.testing;
+
+import com.google.appengine.api.users.User;
+import com.google.appengine.api.users.UserService;
+import java.util.Set;
+import javax.annotation.Nullable;
+
+// TODO: Consider reconciling this with AppEngineRule.withUserService()
+
+/** Fake implementation of {@link UserService} for testing. */
+public class FakeUserService implements UserService {
+
+  @Nullable private User user = null;
+  private boolean isAdmin = false;
+
+  public void setUser(@Nullable User user, boolean isAdmin) {
+    this.user = user;
+    this.isAdmin = isAdmin;
+  }
+
+  @Override
+  public String createLoginURL(String destinationURL) {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public String createLoginURL(String destinationURL, String authDomain) {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public String createLoginURL(String destinationURL, String authDomain, String federatedIdentity,
+      Set<String> attributesRequest) {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public String createLogoutURL(String destinationURL) {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public String createLogoutURL(String destinationURL, String authDomain) {
+    throw new UnsupportedOperationException();
+  }
+
+  @Override
+  public boolean isUserLoggedIn() {
+    return user != null;
+  }
+
+  @Override
+  public boolean isUserAdmin() {
+    return isAdmin;
+  }
+
+  @Override
+  public User getCurrentUser() {
+    return user;
+  }
+}