HBASE-13755 Provide single super user check implementation

hbase-common/src/main/java/org/apache/hadoop/hbase/AuthUtil.java

@@ -39,6 +39,9 @@ import org.apache.hadoop.security.UserGroupInformation;
 public class AuthUtil {
   private static final Log LOG = LogFactory.getLog(AuthUtil.class);
 
+  /** Prefix character to denote group names */
+  public static final String GROUP_PREFIX = "@";
+
   private AuthUtil() {
     super();
   }
@@ -100,4 +103,32 @@ public class AuthUtil {
 
     return refreshCredentials;
   }
+
+  /**
+   * Returns whether or not the given name should be interpreted as a group
+   * principal.  Currently this simply checks if the name starts with the
+   * special group prefix character ("@").
+   */
+  public static boolean isGroupPrincipal(String name) {
+    return name != null && name.startsWith(GROUP_PREFIX);
+  }
+
+  /**
+   * Returns the actual name for a group principal (stripped of the
+   * group prefix).
+   */
+  public static String getGroupName(String aclKey) {
+    if (!isGroupPrincipal(aclKey)) {
+      return aclKey;
+    }
+
+    return aclKey.substring(GROUP_PREFIX.length());
+  }
+
+  /**
+   * Returns the group entry with the group prefix for a group principal.
+   */
+  public static String toGroupEntry(String name) {
+    return GROUP_PREFIX + name;
+  }
 }

hbase-common/src/main/java/org/apache/hadoop/hbase/security/Superusers.java

@@ -0,0 +1,124 @@
+/*
+ *
+ * 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.hbase.security;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.AuthUtil;
+import org.apache.hadoop.hbase.classification.InterfaceAudience;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Keeps lists of superusers and super groups loaded from HBase configuration,
+ * checks if certain user is regarded as superuser.
+ */
+@InterfaceAudience.Private
+public final class Superusers {
+  private static final Log LOG = LogFactory.getLog(Superusers.class);
+
+  /** Configuration key for superusers */
+  public static final String SUPERUSER_CONF_KEY = "hbase.superuser"; // Not getting a name
+
+  private static List<String> superUsers;
+  private static List<String> superGroups;
+
+  private Superusers(){}
+
+  /**
+   * Should be called only once to pre-load list of super users and super
+   * groups from Configuration. This operation is idempotent.
+   * @param conf configuration to load users from
+   * @throws IOException if unable to initialize lists of superusers or super groups
+   * @throws IllegalStateException if current user is null
+   */
+  public static void initialize(Configuration conf) throws IOException {
+    superUsers = new ArrayList<>();
+    superGroups = new ArrayList<>();
+    User user = User.getCurrent();
+
+    if (user == null) {
+      throw new IllegalStateException("Unable to obtain the current user, "
+        + "authorization checks for internal operations will not work correctly!");
+    }
+
+    if (LOG.isTraceEnabled()) {
+      LOG.trace("Current user name is " + user.getShortName());
+    }
+    String currentUser = user.getShortName();
+    String[] superUserList = conf.getStrings(SUPERUSER_CONF_KEY, new String[0]);
+    for (String name : superUserList) {
+      if (AuthUtil.isGroupPrincipal(name)) {
+        superGroups.add(AuthUtil.getGroupName(name));
+      } else {
+        superUsers.add(name);
+      }
+    }
+    superUsers.add(currentUser);
+  }
+
+  /**
+   * @return true if current user is a super user (whether as user running process,
+   * declared as individual superuser or member of supergroup), false otherwise.
+   * @param user to check
+   * @throws IllegalStateException if lists of superusers/super groups
+   *   haven't been initialized properly
+   */
+  public static boolean isSuperUser(User user) {
+    if (superUsers == null) {
+      throw new IllegalStateException("Super users/super groups lists"
+        + " haven't been initialized properly.");
+    }
+    if (superUsers.contains(user.getShortName())) {
+      return true;
+    }
+
+    for (String group : user.getGroupNames()) {
+      if (superGroups.contains(group)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * @return true if current user is a super user (whether as user running process,
+   * or declared as superuser in configuration), false otherwise.
+   * @param user to check
+   * @throws IllegalStateException if lists of superusers/super groups
+   *   haven't been initialized properly
+   * @deprecated this method is for backward compatibility, use {@link #isSuperUser(User)} instead
+   */
+  @Deprecated
+  public static boolean isSuperUser(String user) {
+    if (superUsers == null) {
+      throw new IllegalStateException("Super users/super groups lists"
+        + " haven't been initialized properly.");
+    }
+    if (superUsers.contains(user)) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+}

hbase-common/src/main/java/org/apache/hadoop/hbase/security/User.java

@@ -228,7 +228,8 @@ public abstract class User {
    */
   public static User createUserForTesting(Configuration conf,
       String name, String[] groups) {
-    return SecureHadoopUser.createUserForTesting(conf, name, groups);
+    User userForTesting = SecureHadoopUser.createUserForTesting(conf, name, groups);
+    return userForTesting;
   }
 
   /**

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AnnotationReadingPriorityFunction.java

@@ -17,11 +17,8 @@
  */
 package org.apache.hadoop.hbase.regionserver;
 
-import java.io.IOException;
 import java.lang.reflect.Method;
 import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
 import java.util.Map;
 
 import org.apache.commons.logging.Log;
@@ -52,9 +49,8 @@ import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.RequestHeader;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.protobuf.Message;
 import com.google.protobuf.TextFormat;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.security.visibility.VisibilityUtils;
-import org.apache.hadoop.hbase.util.Pair;
 
 /**
  * Reads special method annotations and table names to figure a priority for use by QoS facility in
@@ -110,11 +106,6 @@ class AnnotationReadingPriorityFunction implements PriorityFunction {
 
   private final float scanVirtualTimeWeight;
 
-  // lists of super users and super groups, used to route rpc calls made by
-  // superusers through high-priority (ADMIN_QOS) thread pool.
-  // made protected for tests
-  protected final HashSet<String> superUsers;
-  protected final HashSet<String> superGroups;
   /**
    * Calls {@link #AnnotationReadingPriorityFunction(RSRpcServices, Class)} using the result of
    * {@code rpcServices#getClass()}
@@ -168,16 +159,6 @@ class AnnotationReadingPriorityFunction implements PriorityFunction {
 
     Configuration conf = rpcServices.getConfiguration();
     scanVirtualTimeWeight = conf.getFloat(SCAN_VTIME_WEIGHT_CONF_KEY, 1.0f);
-
-    try {
-      // TODO Usage of VisibilityUtils API to be avoided with HBASE-13755
-      Pair<List<String>, List<String>> pair = VisibilityUtils.getSystemAndSuperUsers(rpcServices
-          .getConfiguration());
-      superUsers = new HashSet<>(pair.getFirst());
-      superGroups = new HashSet<>(pair.getSecond());
-    } catch (IOException e) {
-      throw new RuntimeException(e);
-    }
   }
 
   private String capitalize(final String s) {
@@ -203,8 +184,15 @@ class AnnotationReadingPriorityFunction implements PriorityFunction {
     }
 
     // all requests executed by super users have high QoS
-    if (isExecutedBySuperUser(user)) {
-      return HConstants.ADMIN_QOS;
+    try {
+      if (Superusers.isSuperUser(user)) {
+        return HConstants.ADMIN_QOS;
+      }
+    } catch (IllegalStateException ex) {
+      // Not good throwing an exception out of here, a runtime anyways.  Let the query go into the
+      // server and have it throw the exception if still an issue.  Just mark it normal priority.
+      if (LOG.isTraceEnabled()) LOG.trace("Marking normal priority after getting exception=" + ex);
+      return HConstants.NORMAL_QOS;
     }
 
     if (param == null) {
@@ -306,24 +294,4 @@ class AnnotationReadingPriorityFunction implements PriorityFunction {
   void setRegionServer(final HRegionServer hrs) {
     this.rpcServices = hrs.getRSRpcServices();
   }
-
-  /**
-   * @param user user running request
-   * @return true if user is super user, false otherwise
-   */
-  private boolean isExecutedBySuperUser(User user) {
-    if (superUsers.contains(user.getShortName())) {
-      return true;
-    }
-
-    String[] groups = user.getGroupNames();
-    if (groups != null) {
-      for (String group : groups) {
-        if (superGroups.contains(group)) {
-          return true;
-        }
-      }
-    }
-    return false;
-  }
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java

@@ -138,6 +138,7 @@ import org.apache.hadoop.hbase.regionserver.handler.RegionReplicaFlushHandler;
 import org.apache.hadoop.hbase.regionserver.wal.MetricsWAL;
 import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;
 import org.apache.hadoop.hbase.replication.regionserver.ReplicationLoad;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.trace.SpanReceiverHost;
 import org.apache.hadoop.hbase.util.Addressing;
@@ -497,6 +498,7 @@ public class HRegionServer extends HasThread implements
     this.conf = conf;
     checkCodecs(this.conf);
     this.userProvider = UserProvider.instantiate(conf);
+    Superusers.initialize(conf);
     FSUtils.setupShortCircuitRead(this.conf);
     // Disable usage of meta replicas in the regionserver
     this.conf.setBoolean(HConstants.USE_META_REPLICAS, false);

hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlLists.java

@@ -34,6 +34,7 @@ import java.util.TreeSet;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.AuthUtil;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellUtil;
 import org.apache.hadoop.hbase.HColumnDescriptor;
@@ -114,10 +115,6 @@ public class AccessControlLists {
    * Delimiter to separate user, column family, and qualifier in
    * _acl_ table info: column keys */
   public static final char ACL_KEY_DELIMITER = ',';
-  /** Prefix character to denote group names */
-  public static final String GROUP_PREFIX = "@";
-  /** Configuration key for superusers */
-  public static final String SUPERUSER_CONF_KEY = "hbase.superuser";
 
   private static final Log LOG = LogFactory.getLog(AccessControlLists.class);
 
@@ -619,34 +616,6 @@ public class AccessControlLists {
     }
   }
 
-  /**
-   * Returns whether or not the given name should be interpreted as a group
-   * principal.  Currently this simply checks if the name starts with the
-   * special group prefix character ("@").
-   */
-  public static boolean isGroupPrincipal(String name) {
-    return name != null && name.startsWith(GROUP_PREFIX);
-  }
-
-  /**
-   * Returns the actual name for a group principal (stripped of the
-   * group prefix).
-   */
-  public static String getGroupName(String aclKey) {
-    if (!isGroupPrincipal(aclKey)) {
-      return aclKey;
-    }
-
-    return aclKey.substring(GROUP_PREFIX.length());
-  }
-
-  /**
-   * Returns the group entry with the group prefix for a group principal.
-   */
-  public static String toGroupEntry(String name) {
-    return GROUP_PREFIX + name;
-  }
-
   public static boolean isNamespaceEntry(String entryName) {
     return entryName.charAt(0) == NAMESPACE_PREFIX;
   }
@@ -705,7 +674,7 @@ public class AccessControlLists {
          String groupNames[] = user.getGroupNames();
          if (groupNames != null) {
            for (String group : groupNames) {
-             List<Permission> groupPerms = kvPerms.get(GROUP_PREFIX + group);
+             List<Permission> groupPerms = kvPerms.get(AuthUtil.toGroupEntry(group));
              if (results != null) {
                results.addAll(groupPerms);
              }

hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java

@@ -96,6 +96,7 @@ import org.apache.hadoop.hbase.regionserver.Store;
 import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
 import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
 import org.apache.hadoop.hbase.security.AccessDeniedException;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.security.access.Permission.Action;
@@ -181,9 +182,6 @@ public class AccessController extends BaseMasterAndRegionObserver
   /** Provider for mapping principal names to Users */
   private UserProvider userProvider;
 
-  /** The list of users with superuser authority */
-  private List<String> superusers;
-
   /** if we are active, usually true, only not true if "hbase.security.authorization"
    has been set to false in site configuration */
   boolean authorizationEnabled;
@@ -891,7 +889,7 @@ public class AccessController extends BaseMasterAndRegionObserver
       return;
     }
     // Superusers are allowed to store cells unconditionally.
-    if (superusers.contains(user.getShortName())) {
+    if (Superusers.isSuperUser(user)) {
       m.setAttribute(TAG_CHECK_PASSED, TRUE);
       return;
     }
@@ -955,11 +953,6 @@ public class AccessController extends BaseMasterAndRegionObserver
     // set the user-provider.
     this.userProvider = UserProvider.instantiate(env.getConfiguration());
 
-    // set up the list of users with superuser privilege
-    User user = userProvider.getCurrent();
-    superusers = Lists.asList(user.getShortName(),
-      conf.getStrings(AccessControlLists.SUPERUSER_CONF_KEY, new String[0]));
-
     // If zk is null or IOException while obtaining auth manager,
     // throw RuntimeException so that the coprocessor is unloaded.
     if (zk != null) {
@@ -1355,7 +1348,7 @@ public class AccessController extends BaseMasterAndRegionObserver
     } else {
       HRegionInfo regionInfo = region.getRegionInfo();
       if (regionInfo.getTable().isSystemTable()) {
-        isSystemOrSuperUser(regionEnv.getConfiguration());
+        checkSystemOrSuperUser();
       } else {
         requirePermission("preOpen", Action.ADMIN);
       }
@@ -2394,20 +2387,15 @@ public class AccessController extends BaseMasterAndRegionObserver
     requirePermission("preClose", Action.ADMIN);
   }
 
-  private void isSystemOrSuperUser(Configuration conf) throws IOException {
+  private void checkSystemOrSuperUser() throws IOException {
     // No need to check if we're not going to throw
     if (!authorizationEnabled) {
       return;
     }
-    User user = userProvider.getCurrent();
-    if (user == null) {
-      throw new IOException("Unable to obtain the current user, " +
-        "authorization checks for internal operations will not work correctly!");
-    }
     User activeUser = getActiveUser();
-    if (!(superusers.contains(activeUser.getShortName()))) {
-      throw new AccessDeniedException("User '" + (user != null ? user.getShortName() : "null") +
-        "is not system or super user.");
+    if (!Superusers.isSuperUser(activeUser)) {
+      throw new AccessDeniedException("User '" + (activeUser != null ?
+        activeUser.getShortName() : "null") + "is not system or super user.");
     }
   }
 

hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/TableAuthManager.java

@@ -26,11 +26,13 @@ import java.util.concurrent.ConcurrentSkipListMap;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hbase.AuthUtil;
 import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.util.Bytes;
@@ -78,13 +80,13 @@ public class TableAuthManager {
 
     /**
      * Returns a combined map of user and group permissions, with group names prefixed by
-     * {@link AccessControlLists#GROUP_PREFIX}.
+     * {@link AuthUtil#GROUP_PREFIX}.
      */
     public ListMultimap<String,T> getAllPermissions() {
       ListMultimap<String,T> tmp = ArrayListMultimap.create();
       tmp.putAll(userCache);
       for (String group : groupCache.keySet()) {
-        tmp.putAll(AccessControlLists.GROUP_PREFIX + group, groupCache.get(group));
+        tmp.putAll(AuthUtil.toGroupEntry(group), groupCache.get(group));
       }
       return tmp;
     }
@@ -138,11 +140,11 @@ public class TableAuthManager {
 
     // the system user is always included
     List<String> superusers = Lists.asList(currentUser, conf.getStrings(
-        AccessControlLists.SUPERUSER_CONF_KEY, new String[0]));
+        Superusers.SUPERUSER_CONF_KEY, new String[0]));
     if (superusers != null) {
       for (String name : superusers) {
-        if (AccessControlLists.isGroupPrincipal(name)) {
-          newCache.putGroup(AccessControlLists.getGroupName(name),
+        if (AuthUtil.isGroupPrincipal(name)) {
+          newCache.putGroup(AuthUtil.getGroupName(name),
               new Permission(Permission.Action.values()));
         } else {
           newCache.putUser(name, new Permission(Permission.Action.values()));
@@ -204,8 +206,8 @@ public class TableAuthManager {
     try {
       newCache = initGlobal(conf);
       for (Map.Entry<String,TablePermission> entry : userPerms.entries()) {
-        if (AccessControlLists.isGroupPrincipal(entry.getKey())) {
-          newCache.putGroup(AccessControlLists.getGroupName(entry.getKey()),
+        if (AuthUtil.isGroupPrincipal(entry.getKey())) {
+          newCache.putGroup(AuthUtil.getGroupName(entry.getKey()),
               new Permission(entry.getValue().getActions()));
         } else {
           newCache.putUser(entry.getKey(), new Permission(entry.getValue().getActions()));
@@ -232,8 +234,8 @@ public class TableAuthManager {
     PermissionCache<TablePermission> newTablePerms = new PermissionCache<TablePermission>();
 
     for (Map.Entry<String,TablePermission> entry : tablePerms.entries()) {
-      if (AccessControlLists.isGroupPrincipal(entry.getKey())) {
-        newTablePerms.putGroup(AccessControlLists.getGroupName(entry.getKey()), entry.getValue());
+      if (AuthUtil.isGroupPrincipal(entry.getKey())) {
+        newTablePerms.putGroup(AuthUtil.getGroupName(entry.getKey()), entry.getValue());
       } else {
         newTablePerms.putUser(entry.getKey(), entry.getValue());
       }
@@ -256,8 +258,8 @@ public class TableAuthManager {
     PermissionCache<TablePermission> newTablePerms = new PermissionCache<TablePermission>();
 
     for (Map.Entry<String, TablePermission> entry : tablePerms.entries()) {
-      if (AccessControlLists.isGroupPrincipal(entry.getKey())) {
-        newTablePerms.putGroup(AccessControlLists.getGroupName(entry.getKey()), entry.getValue());
+      if (AuthUtil.isGroupPrincipal(entry.getKey())) {
+        newTablePerms.putGroup(AuthUtil.getGroupName(entry.getKey()), entry.getValue());
       } else {
         newTablePerms.putUser(entry.getKey(), entry.getValue());
       }

hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/DefaultVisibilityLabelServiceImpl.java

@@ -42,6 +42,7 @@ import java.util.regex.Pattern;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.AuthUtil;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellUtil;
 import org.apache.hadoop.hbase.HConstants;
@@ -59,8 +60,8 @@ import org.apache.hadoop.hbase.io.util.StreamUtils;
 import org.apache.hadoop.hbase.regionserver.OperationStatus;
 import org.apache.hadoop.hbase.regionserver.Region;
 import org.apache.hadoop.hbase.regionserver.RegionScanner;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.security.access.AccessControlLists;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
@@ -80,8 +81,6 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
   private Region labelsRegion;
   private VisibilityLabelsCache labelsCache;
   private List<ScanLabelGenerator> scanLabelGenerators;
-  private List<String> superUsers;
-  private List<String> superGroups;
 
   static {
     ByteArrayOutputStream baos = new ByteArrayOutputStream();
@@ -118,10 +117,6 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
       throw ioe;
     }
     this.scanLabelGenerators = VisibilityUtils.getScanLabelGenerators(this.conf);
-    Pair<List<String>, List<String>> superUsersAndGroups =
-        VisibilityUtils.getSystemAndSuperUsers(this.conf);
-    this.superUsers = superUsersAndGroups.getFirst();
-    this.superGroups = superUsersAndGroups.getSecond();
     if (e.getRegion().getRegionInfo().getTable().equals(LABELS_TABLE_NAME)) {
       this.labelsRegion = e.getRegion();
       Pair<Map<String, Integer>, Map<String, List<Integer>>> labelsAndUserAuths =
@@ -266,8 +261,8 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
     assert labelsRegion != null;
     OperationStatus[] finalOpStatus = new OperationStatus[authLabels.size()];
     List<String> currentAuths;
-    if (AccessControlLists.isGroupPrincipal(Bytes.toString(user))) {
-      String group = AccessControlLists.getGroupName(Bytes.toString(user));
+    if (AuthUtil.isGroupPrincipal(Bytes.toString(user))) {
+      String group = AuthUtil.getGroupName(Bytes.toString(user));
       currentAuths = this.getGroupAuths(new String[]{group}, true);
     }
     else {
@@ -308,7 +303,7 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
   private boolean mutateLabelsRegion(List<Mutation> mutations, OperationStatus[] finalOpStatus)
       throws IOException {
     OperationStatus[] opStatus = this.labelsRegion.batchMutate(mutations
-        .toArray(new Mutation[mutations.size()]), HConstants.NO_NONCE, HConstants.NO_NONCE);
+      .toArray(new Mutation[mutations.size()]), HConstants.NO_NONCE, HConstants.NO_NONCE);
     int i = 0;
     boolean updateZk = false;
     for (OperationStatus status : opStatus) {
@@ -343,7 +338,7 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
       s.addColumn(LABELS_TABLE_FAMILY, user);
     }
     Filter filter = VisibilityUtils.createVisibilityLabelFilter(this.labelsRegion,
-        new Authorizations(SYSTEM_LABEL));
+      new Authorizations(SYSTEM_LABEL));
     s.setFilter(filter);
     ArrayList<String> auths = new ArrayList<String>();
     RegionScanner scanner = this.labelsRegion.getScanner(s);
@@ -376,7 +371,7 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
     Scan s = new Scan();
     if (groups != null && groups.length > 0) {
       for (String group : groups) {
-        s.addColumn(LABELS_TABLE_FAMILY, Bytes.toBytes(AccessControlLists.toGroupEntry(group)));
+        s.addColumn(LABELS_TABLE_FAMILY, Bytes.toBytes(AuthUtil.toGroupEntry(group)));
       }
     }
     Filter filter = VisibilityUtils.createVisibilityLabelFilter(this.labelsRegion,
@@ -547,7 +542,7 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
   @Deprecated
   public boolean havingSystemAuth(byte[] user) throws IOException {
     // Implementation for backward compatibility
-    if (this.superUsers.contains(Bytes.toString(user))) {
+    if (Superusers.isSuperUser(Bytes.toString(user))) {
       return true;
     }
     List<String> auths = this.getUserAuths(user, true);
@@ -560,7 +555,7 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
   @Override
   public boolean havingSystemAuth(User user) throws IOException {
     // A super user has 'system' auth.
-    if (isSystemOrSuperUser(user)) {
+    if (Superusers.isSuperUser(user)) {
       return true;
     }
     // A user can also be explicitly granted 'system' auth.
@@ -578,21 +573,6 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
     return auths.contains(SYSTEM_LABEL);
   }
 
-  private boolean isSystemOrSuperUser(User user) throws IOException {
-    if (this.superUsers.contains(user.getShortName())) {
-      return true;
-    }
-    String[] groups = user.getGroupNames();
-    if (groups != null && groups.length > 0) {
-      for (String group : groups) {
-        if (this.superGroups.contains(group)) {
-          return true;
-        }
-      }
-    }
-    return false;
-  }
-
   @Override
   public boolean matchVisibility(List<Tag> putVisTags, Byte putTagsFormat, List<Tag> deleteVisTags,
       Byte deleteTagsFormat) throws IOException {

hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityController.java

@@ -34,6 +34,7 @@ import java.util.Map;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.AuthUtil;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellScanner;
 import org.apache.hadoop.hbase.CellUtil;
@@ -97,8 +98,8 @@ import org.apache.hadoop.hbase.regionserver.Region;
 import org.apache.hadoop.hbase.regionserver.RegionScanner;
 import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
 import org.apache.hadoop.hbase.security.AccessDeniedException;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.security.access.AccessControlLists;
 import org.apache.hadoop.hbase.security.access.AccessController;
 import org.apache.hadoop.hbase.util.ByteStringer;
 import org.apache.hadoop.hbase.util.Bytes;
@@ -133,8 +134,6 @@ public class VisibilityController extends BaseMasterAndRegionObserver implements
   private Map<InternalScanner,String> scannerOwners =
       new MapMaker().weakKeys().makeMap();
 
-  private List<String> superUsers;
-  private List<String> superGroups;
   private VisibilityLabelService visibilityLabelService;
 
   /** if we are active, usually true, only not true if "hbase.security.authorization"
@@ -173,10 +172,6 @@ public class VisibilityController extends BaseMasterAndRegionObserver implements
       visibilityLabelService = VisibilityLabelServiceManager.getInstance()
           .getVisibilityLabelService(this.conf);
     }
-    Pair<List<String>, List<String>> superUsersAndGroups =
-        VisibilityUtils.getSystemAndSuperUsers(this.conf);
-    this.superUsers = superUsersAndGroups.getFirst();
-    this.superGroups = superUsersAndGroups.getSecond();
   }
 
   @Override
@@ -687,19 +682,7 @@ public class VisibilityController extends BaseMasterAndRegionObserver implements
   }
 
   private boolean isSystemOrSuperUser() throws IOException {
-    User activeUser = VisibilityUtils.getActiveUser();
-    if (this.superUsers.contains(activeUser.getShortName())) {
-      return true;
-    }
-    String[] groups = activeUser.getGroupNames();
-    if (groups != null && groups.length > 0) {
-      for (String group : groups) {
-        if (this.superGroups.contains(group)) {
-          return true;
-        }
-      }
-    }
-    return false;
+    return Superusers.isSuperUser(VisibilityUtils.getActiveUser());
   }
 
   @Override
@@ -927,7 +910,7 @@ public class VisibilityController extends BaseMasterAndRegionObserver implements
               + (requestingUser != null ? requestingUser.getShortName() : "null")
               + "' is not authorized to perform this action.");
         }
-        if (AccessControlLists.isGroupPrincipal(Bytes.toString(user))) {
+        if (AuthUtil.isGroupPrincipal(Bytes.toString(user))) {
           // For backward compatibility. Previous custom visibilityLabelService
           // implementation may not have getGroupAuths
           try {
@@ -939,7 +922,7 @@ public class VisibilityController extends BaseMasterAndRegionObserver implements
             throw new AccessDeniedException(
                 "Get group auth is not supported in this implementation");
           }
-          String group = AccessControlLists.getGroupName(Bytes.toString(user));
+          String group = AuthUtil.getGroupName(Bytes.toString(user));
           labels = this.visibilityLabelService.getGroupAuths(new String[] { group }, false);
         } else {
           labels = this.visibilityLabelService.getAuths(user, false);

hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelsCache.java

@@ -30,12 +30,12 @@ import java.util.concurrent.locks.ReentrantReadWriteLock;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.AuthUtil;
 import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.protobuf.generated.VisibilityLabelsProtos.MultiUserAuthorizations;
 import org.apache.hadoop.hbase.protobuf.generated.VisibilityLabelsProtos.UserAuthorizations;
 import org.apache.hadoop.hbase.protobuf.generated.VisibilityLabelsProtos.VisibilityLabel;
-import org.apache.hadoop.hbase.security.access.AccessControlLists;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 import org.apache.zookeeper.KeeperException;
@@ -145,8 +145,8 @@ public class VisibilityLabelsCache implements VisibilityLabelOrdinalProvider {
       this.groupAuths.clear();
       for (UserAuthorizations userAuths : multiUserAuths.getUserAuthsList()) {
         String user = Bytes.toString(userAuths.getUser().toByteArray());
-        if (AccessControlLists.isGroupPrincipal(user)) {
-          this.groupAuths.put(AccessControlLists.getGroupName(user),
+        if (AuthUtil.isGroupPrincipal(user)) {
+          this.groupAuths.put(AuthUtil.getGroupName(user),
             new HashSet<Integer>(userAuths.getAuthList()));
         } else {
           this.userAuths.put(user, new HashSet<Integer>(userAuths.getAuthList()));

hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityUtils.java

@@ -53,7 +53,6 @@ import org.apache.hadoop.hbase.protobuf.generated.VisibilityLabelsProtos.Visibil
 import org.apache.hadoop.hbase.regionserver.Region;
 import org.apache.hadoop.hbase.security.AccessDeniedException;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.security.access.AccessControlLists;
 import org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode;
 import org.apache.hadoop.hbase.security.visibility.expression.LeafExpressionNode;
 import org.apache.hadoop.hbase.security.visibility.expression.NonLeafExpressionNode;
@@ -61,7 +60,6 @@ import org.apache.hadoop.hbase.security.visibility.expression.Operator;
 import org.apache.hadoop.hbase.util.ByteRange;
 import org.apache.hadoop.hbase.util.ByteStringer;
 import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.util.SimpleMutableByteRange;
 import org.apache.hadoop.util.ReflectionUtils;
 
@@ -102,38 +100,6 @@ public class VisibilityUtils {
     return ProtobufUtil.prependPBMagic(visReqBuilder.build().toByteArray());
   }
 
-  /**
-   * Get the super users and groups defined in the configuration.
-   * The user running the hbase server is always included.
-   * @param conf
-   * @return Pair of super user list and super group list.
-   * @throws IOException
-   */
-  public static Pair<List<String>, List<String>> getSystemAndSuperUsers(Configuration conf)
-      throws IOException {
-    ArrayList<String> superUsers = new ArrayList<String>();
-    ArrayList<String> superGroups = new ArrayList<String>();
-    User user = User.getCurrent();
-    if (user == null) {
-      throw new IOException("Unable to obtain the current user, "
-          + "authorization checks for internal operations will not work correctly!");
-    }
-    if (LOG.isTraceEnabled()) {
-      LOG.trace("Current user name is " + user.getShortName());
-    }
-    String currentUser = user.getShortName();
-    String[] superUserList = conf.getStrings(AccessControlLists.SUPERUSER_CONF_KEY, new String[0]);
-    for (String name : superUserList) {
-      if (AccessControlLists.isGroupPrincipal(name)) {
-        superGroups.add(AccessControlLists.getGroupName(name));
-      } else {
-        superUsers.add(name);
-      }
-    }
-    superUsers.add(currentUser);
-    return new Pair<List<String>, List<String>>(superUsers, superGroups);
-  }
-
   /**
    * Creates the user auth data to be written to zookeeper.
    * @param userAuths

hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPriorityRpc.java

@@ -24,6 +24,7 @@ import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
 
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.util.ByteStringer;
 import org.apache.hadoop.conf.Configuration;
@@ -121,13 +122,15 @@ public class TestPriorityRpc {
     PriorityFunction qosFunc = regionServer.rpcServices.getPriority();
 
     //test superusers
-    ((AnnotationReadingPriorityFunction) qosFunc).superUsers.add("samplesuperuser");
+    regionServer.conf.set(Superusers.SUPERUSER_CONF_KEY, "samplesuperuser");
+    Superusers.initialize(regionServer.conf);
     assertEquals(HConstants.ADMIN_QOS, qosFunc.getPriority(header, null,
       User.createUserForTesting(regionServer.conf, "samplesuperuser",
         new String[]{"somegroup"})));
 
     //test supergroups
-    ((AnnotationReadingPriorityFunction) qosFunc).superGroups.add("samplesupergroup");
+    regionServer.conf.set(Superusers.SUPERUSER_CONF_KEY, "@samplesupergroup");
+    Superusers.initialize(regionServer.conf);
     assertEquals(HConstants.ADMIN_QOS, qosFunc.getPriority(header, null,
       User.createUserForTesting(regionServer.conf, "regularuser",
         new String[]{"samplesupergroup"})));

hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestQosFunction.java

@@ -1,4 +1,3 @@
-package org.apache.hadoop.hbase.regionserver;
 /**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
@@ -16,19 +15,23 @@ package org.apache.hadoop.hbase.regionserver;
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
+
+package org.apache.hadoop.hbase.regionserver;
+
 import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.when;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.security.Superusers;
+import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.HRegionInfo;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos;
-import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MultiRequest;
 import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.RequestHeader;
@@ -39,6 +42,8 @@ import org.mockito.Mockito;
 
 import com.google.protobuf.Message;
 
+import java.io.IOException;
+
 /**
  * Basic test that qos function is sort of working; i.e. a change in method naming style
  * over in pb doesn't break it.
@@ -65,8 +70,9 @@ public class TestQosFunction {
   }
 
   @Test
-  public void testRegionInTransition() {
+  public void testRegionInTransition() throws IOException {
     Configuration conf = HBaseConfiguration.create();
+    Superusers.initialize(conf);
     RSRpcServices rpcServices = Mockito.mock(RSRpcServices.class);
     when(rpcServices.getConfiguration()).thenReturn(conf);
 
@@ -121,4 +127,4 @@ public class TestQosFunction {
     assertEquals(methodName, expected, qosf.getPriority(builder.build(), param,
       User.createUserForTesting(conf, "someuser", new String[]{"somegroup"})));
   }
-}
+}

hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/SecureTestUtil.java

@@ -719,10 +719,6 @@ public class SecureTestUtil {
     return AccessControlLists.NAMESPACE_PREFIX + namespace;
   }
 
-  public static String convertToGroup(String group) {
-    return AccessControlLists.GROUP_PREFIX + group;
-  }
-
   public static void checkGlobalPerms(HBaseTestingUtility testUtil, Permission.Action... actions)
       throws IOException {
     Permission[] perms = new Permission[actions.length];

hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java

@@ -18,6 +18,7 @@
 
 package org.apache.hadoop.hbase.security.access;
 
+import static org.apache.hadoop.hbase.AuthUtil.toGroupEntry;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
@@ -284,10 +285,10 @@ public class TestAccessController extends SecureTestUtil {
       TEST_TABLE, TEST_FAMILY,
       null, Permission.Action.ADMIN, Permission.Action.CREATE);
 
-    grantGlobal(TEST_UTIL, convertToGroup(GROUP_ADMIN), Permission.Action.ADMIN);
-    grantGlobal(TEST_UTIL, convertToGroup(GROUP_CREATE), Permission.Action.CREATE);
-    grantGlobal(TEST_UTIL, convertToGroup(GROUP_READ), Permission.Action.READ);
-    grantGlobal(TEST_UTIL, convertToGroup(GROUP_WRITE), Permission.Action.WRITE);
+    grantGlobal(TEST_UTIL, toGroupEntry(GROUP_ADMIN), Permission.Action.ADMIN);
+    grantGlobal(TEST_UTIL, toGroupEntry(GROUP_CREATE), Permission.Action.CREATE);
+    grantGlobal(TEST_UTIL, toGroupEntry(GROUP_READ), Permission.Action.READ);
+    grantGlobal(TEST_UTIL, toGroupEntry(GROUP_WRITE), Permission.Action.WRITE);
 
     assertEquals(5, AccessControlLists.getTablePermissions(conf, TEST_TABLE).size());
     try {

hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController2.java

@@ -17,6 +17,7 @@
  */
 package org.apache.hadoop.hbase.security.access;
 
+import static org.apache.hadoop.hbase.AuthUtil.toGroupEntry;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
@@ -108,7 +109,7 @@ public class TestAccessController2 extends SecureTestUtil {
     // Wait for the ACL table to become available
     TEST_UTIL.waitUntilAllRegionsAssigned(AccessControlLists.ACL_TABLE_NAME);
 
-    TESTGROUP_1_NAME = convertToGroup(TESTGROUP_1);
+    TESTGROUP_1_NAME = toGroupEntry(TESTGROUP_1);
     TESTGROUP1_USER1 =
         User.createUserForTesting(conf, "testgroup1_user1", new String[] { TESTGROUP_1 });
     TESTGROUP2_USER1 =

hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestNamespaceCommands.java

@@ -17,6 +17,7 @@
  */
 package org.apache.hadoop.hbase.security.access;
 
+import static org.apache.hadoop.hbase.AuthUtil.toGroupEntry;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
@@ -163,10 +164,10 @@ public class TestNamespaceCommands extends SecureTestUtil {
 
     grantOnNamespace(UTIL, USER_NS_ADMIN.getShortName(), TEST_NAMESPACE2, Permission.Action.ADMIN);
 
-    grantGlobal(UTIL, convertToGroup(GROUP_ADMIN), Permission.Action.ADMIN);
-    grantGlobal(UTIL, convertToGroup(GROUP_CREATE), Permission.Action.CREATE);
-    grantGlobal(UTIL, convertToGroup(GROUP_READ), Permission.Action.READ);
-    grantGlobal(UTIL, convertToGroup(GROUP_WRITE), Permission.Action.WRITE);
+    grantGlobal(UTIL, toGroupEntry(GROUP_ADMIN), Permission.Action.ADMIN);
+    grantGlobal(UTIL, toGroupEntry(GROUP_CREATE), Permission.Action.CREATE);
+    grantGlobal(UTIL, toGroupEntry(GROUP_READ), Permission.Action.READ);
+    grantGlobal(UTIL, toGroupEntry(GROUP_WRITE), Permission.Action.WRITE);
   }
 
   @AfterClass

hbase-server/src/test/java/org/apache/hadoop/hbase/security/visibility/ExpAsStringVisibilityLabelServiceImpl.java

@@ -35,6 +35,7 @@ import java.util.Set;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.AuthUtil;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellUtil;
 import org.apache.hadoop.hbase.HConstants.OperationStatusCode;
@@ -50,16 +51,14 @@ import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
 import org.apache.hadoop.hbase.regionserver.OperationStatus;
 import org.apache.hadoop.hbase.regionserver.Region;
+import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.security.access.AccessControlLists;
 import org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode;
 import org.apache.hadoop.hbase.security.visibility.expression.LeafExpressionNode;
 import org.apache.hadoop.hbase.security.visibility.expression.NonLeafExpressionNode;
 import org.apache.hadoop.hbase.security.visibility.expression.Operator;
 import org.apache.hadoop.hbase.util.Bytes;
 
-import com.google.common.collect.Lists;
-
 /**
  * This is a VisibilityLabelService where labels in Mutation's visibility
  * expression will be persisted as Strings itself rather than ordinals in
@@ -81,8 +80,6 @@ public class ExpAsStringVisibilityLabelServiceImpl implements VisibilityLabelSer
   private Configuration conf;
   private Region labelsRegion;
   private List<ScanLabelGenerator> scanLabelGenerators;
-  private List<String> superUsers;
-  private List<String> superGroups;
 
   @Override
   public OperationStatus[] addLabels(List<byte[]> labels) throws IOException {
@@ -117,8 +114,8 @@ public class ExpAsStringVisibilityLabelServiceImpl implements VisibilityLabelSer
     assert labelsRegion != null;
     OperationStatus[] finalOpStatus = new OperationStatus[authLabels.size()];
     List<String> currentAuths;
-    if (AccessControlLists.isGroupPrincipal(Bytes.toString(user))) {
-      String group = AccessControlLists.getGroupName(Bytes.toString(user));
+    if (AuthUtil.isGroupPrincipal(Bytes.toString(user))) {
+      String group = AuthUtil.getGroupName(Bytes.toString(user));
       currentAuths = this.getGroupAuths(new String[]{group}, true);
     }
     else {
@@ -190,7 +187,7 @@ public class ExpAsStringVisibilityLabelServiceImpl implements VisibilityLabelSer
     List<String> auths = new ArrayList<String>();
     if (groups != null && groups.length > 0) {
       for (String group : groups) {
-        Get get = new Get(Bytes.toBytes(AccessControlLists.toGroupEntry(group)));
+        Get get = new Get(Bytes.toBytes(AuthUtil.toGroupEntry(group)));
         List<Cell> cells = null;
         if (labelsRegion == null) {
           Table table = null;
@@ -390,57 +387,16 @@ public class ExpAsStringVisibilityLabelServiceImpl implements VisibilityLabelSer
   @Override
   public void init(RegionCoprocessorEnvironment e) throws IOException {
     this.scanLabelGenerators = VisibilityUtils.getScanLabelGenerators(this.conf);
-    initSystemAndSuperUsers();
     if (e.getRegion().getRegionInfo().getTable().equals(LABELS_TABLE_NAME)) {
       this.labelsRegion = e.getRegion();
     }
   }
 
-  private void initSystemAndSuperUsers() throws IOException {
-    this.superUsers = new ArrayList<String>();
-    this.superGroups = new ArrayList<String>();
-    User user = User.getCurrent();
-    if (user == null) {
-      throw new IOException("Unable to obtain the current user, "
-          + "authorization checks for internal operations will not work correctly!");
-    }
-    if (LOG.isTraceEnabled()) {
-      LOG.trace("Current user name is " + user.getShortName());
-    }
-    String currentUser = user.getShortName();
-    List<String> superUserList = Lists.asList(currentUser,
-        this.conf.getStrings(AccessControlLists.SUPERUSER_CONF_KEY, new String[0]));
-    if (superUserList != null) {
-      for (String name : superUserList) {
-        if (AccessControlLists.isGroupPrincipal(name)) {
-          this.superGroups.add(AccessControlLists.getGroupName(name));
-        } else {
-          this.superUsers.add(name);
-        }
-      }
-    };
-  }
-
-  protected boolean isSystemOrSuperUser(User user) throws IOException {
-    if (this.superUsers.contains(user.getShortName())) {
-      return true;
-    }
-    String[] groups = user.getGroupNames();
-    if (groups != null) {
-      for (String group : groups) {
-        if (this.superGroups.contains(group)) {
-          return true;
-        }
-      }
-    }
-    return false;
-  }
-
   @Override
   @Deprecated
   public boolean havingSystemAuth(byte[] user) throws IOException {
     // Implementation for backward compatibility
-    if (this.superUsers.contains(Bytes.toString(user))) {
+    if (Superusers.isSuperUser(Bytes.toString(user))) {
       return true;
     }
     List<String> auths = this.getUserAuths(user, true);
@@ -452,7 +408,7 @@ public class ExpAsStringVisibilityLabelServiceImpl implements VisibilityLabelSer
 
   @Override
   public boolean havingSystemAuth(User user) throws IOException {
-    if (isSystemOrSuperUser(user)) {
+    if (Superusers.isSuperUser(user)) {
       return true;
     }
     Set<String> auths = new HashSet<String>();