Add request/auth package to Nomulus release

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=147087621

java/google/registry/request/auth/AuthModule.java

@@ -0,0 +1,61 @@
+// 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.request.auth;
+
+import com.google.appengine.api.oauth.OAuthService;
+import com.google.appengine.api.oauth.OAuthServiceFactory;
+import com.google.appengine.api.users.UserService;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import dagger.Module;
+import dagger.Provides;
+import google.registry.config.RegistryConfig.Config;
+
+/**
+ * Dagger module for authentication routines.
+ */
+@Module
+public class AuthModule {
+
+  /** Provides the internal authentication mechanism. */
+  @Provides
+  AppEngineInternalAuthenticationMechanism provideAppEngineInternalAuthenticationMechanism() {
+    return new AppEngineInternalAuthenticationMechanism();
+  }
+
+  /** Provides the custom authentication mechanisms (including OAuth). */
+  @Provides
+  ImmutableList<AuthenticationMechanism> provideApiAuthenticationMechanisms(
+      OAuthService oauthService,
+      @Config("availableOauthScopes") ImmutableSet<String> availableOauthScopes,
+      @Config("requiredOauthScopes") ImmutableSet<String> requiredOauthScopes,
+      @Config("allowedOauthClientIds") ImmutableSet<String> allowedOauthClientIds) {
+    return ImmutableList.<AuthenticationMechanism>of(
+        new OAuthAuthenticationMechanism(
+            oauthService, availableOauthScopes, requiredOauthScopes, allowedOauthClientIds));
+  }
+
+  /** Provides the legacy authentication mechanism. */
+  @Provides
+  LegacyAuthenticationMechanism provideLegacyAuthenticationMechanism(UserService userService) {
+    return new LegacyAuthenticationMechanism(userService);
+  }
+
+  /** Provides the OAuthService instance. */
+  @Provides
+  OAuthService provideOauthService() {
+    return OAuthServiceFactory.getOAuthService();
+  }
+}