ivanzlenko commented on code in PR #4523:
URL: https://github.com/apache/ozone/pull/4523#discussion_r1302757973


##########
hadoop-ozone/s3gateway/src/main/java/org/apache/hadoop/ozone/s3/S3GatewayHttpServer.java:
##########
@@ -17,30 +17,90 @@
  */
 package org.apache.hadoop.ozone.s3;
 
+import com.google.common.base.Strings;
 import java.io.IOException;
-
-import org.apache.hadoop.hdds.conf.MutableConfigurationSource;
-import org.apache.hadoop.hdds.server.http.BaseHttpServer;
-
+import java.util.HashMap;
+import java.util.Map;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import org.apache.hadoop.hdds.conf.MutableConfigurationSource;
+import org.apache.hadoop.hdds.server.http.BaseHttpServer;
+import org.apache.hadoop.hdds.server.http.ServletElementsFactory;
+import org.apache.hadoop.security.SecurityUtil;
+import org.apache.hadoop.security.UserGroupInformation;
+import org.apache.hadoop.security.authentication.server.AuthenticationFilter;
+import org.eclipse.jetty.servlet.FilterHolder;
+import org.eclipse.jetty.servlet.FilterMapping;
+import org.eclipse.jetty.servlet.ServletHandler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static 
org.apache.hadoop.ozone.s3.S3GatewayConfigKeys.OZONE_S3G_HTTP_BIND_HOST_KEY;
+import static 
org.apache.hadoop.ozone.s3secret.S3SecretConfigKeys.OZONE_S3G_SECRET_HTTP_AUTH_TYPE;
+import static 
org.apache.hadoop.ozone.s3secret.S3SecretConfigKeys.OZONE_S3G_SECRET_HTTP_ENABLED_KEY;
+import static 
org.apache.hadoop.ozone.s3secret.S3SecretConfigKeys.OZONE_S3G_SECRET_KEYTAB_FILE;
+import static 
org.apache.hadoop.ozone.s3secret.S3SecretConfigKeys.OZONE_S3G_SECRET_HTTP_KERBEROS_PRINCIPAL;
 
 /**
- * S3 Gateway specific configuration keys.
+ * Http server to provide S3-compatible API.
  */
 public class S3GatewayHttpServer extends BaseHttpServer {
 
+  private static final Logger LOG =
+      LoggerFactory.getLogger(S3GatewayHttpServer.class);
+
   /**
    * Default offset between two filters.
    */
   public static final int FILTER_PRIORITY_DO_AFTER = 50;
 
-  public S3GatewayHttpServer(MutableConfigurationSource conf,
-      String name) throws IOException {
+  public S3GatewayHttpServer(MutableConfigurationSource conf, String name)
+      throws IOException {
     super(conf, name);
     addServlet("icon", "/favicon.ico", IconServlet.class);
+    addSecretAuthentication(conf);
+  }
+
+  private void addSecretAuthentication(MutableConfigurationSource conf)
+      throws IOException {
+
+    if (conf.getBoolean(OZONE_S3G_SECRET_HTTP_ENABLED_KEY, false)) {

Review Comment:
   Done



##########
hadoop-ozone/s3gateway/src/main/java/org/apache/hadoop/ozone/s3secret/S3SecretConfigKeys.java:
##########
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.hadoop.ozone.s3secret;
+
+/**
+ * This class contains constants for configuration keys used
+ * in S3 secret endpoint.
+ */
+public final class S3SecretConfigKeys {
+  public static final String OZONE_S3G_SECRET_HTTP_ENABLED_KEY =
+      "ozone.s3g.secret.http.enabled";
+  public static final String OZONE_S3G_SECRET_HTTP_AUTH_CONFIG_PREFIX =
+      "ozone.s3g.secret.http.auth.";
+  public static final String OZONE_S3G_SECRET_HTTP_AUTH_TYPE =
+      OZONE_S3G_SECRET_HTTP_AUTH_CONFIG_PREFIX + "type";
+  public static final String OZONE_S3G_SECRET_KEYTAB_FILE =

Review Comment:
   Done



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