content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.utils;
  
  import org.apache.atlas.ApplicationProperties;
  import org.apache.atlas.AtlasException;
  import org.apache.commons.configuration.Configuration;
  import org.apache.hadoop.security.UserGroupInformation;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.Console;
  
  /**
   * Util class for Authentication.
   */
  public final class AuthenticationUtil {
      private static final Logger LOG = LoggerFactory.getLogger(AuthenticationUtil.class);
  
      private AuthenticationUtil() {
      }
  
      public static boolean isKerberosAuthenticationEnabled() {
          return isKerberosAuthenticationEnabled((UserGroupInformation) null);
      }
  
      public static boolean isKerberosAuthenticationEnabled(UserGroupInformation ugi) {
          boolean defaultValue = ugi != null && ugi.hasKerberosCredentials();
  
          try {
              return isKerberosAuthenticationEnabled(ApplicationProperties.get(), defaultValue);
          } catch (AtlasException e) {
              LOG.error("Error while isKerberosAuthenticationEnabled ", e);
          }
  
          return defaultValue;
      }
  
      public static boolean isKerberosAuthenticationEnabled(Configuration atlasConf) {
          return isKerberosAuthenticationEnabled(atlasConf, false);
      }
  
      public static boolean isKerberosAuthenticationEnabled(Configuration atlasConf, boolean defaultValue) {
          return atlasConf.getBoolean("atlas.authentication.method.kerberos", defaultValue);
      }
  
      public static boolean includeHadoopGroups() {
          boolean includeHadoopGroups = false;
  
          try {
              Configuration configuration = ApplicationProperties.get();
  
              includeHadoopGroups = configuration.getBoolean("atlas.authentication.ugi-groups.include-hadoop-groups", includeHadoopGroups);
          } catch (AtlasException e) {
              LOG.error("AuthenticationUtil::includeHadoopGroups(). Error while loading atlas application properties ", e);
          }
  
          return includeHadoopGroups;
      }
  
      public static String[] getBasicAuthenticationInput() {
          String username = null;
          String password = null;
  
          try {
              Console console = System.console();
              if (console == null) {
                  System.err.println("Couldn't get a console object for user input");
                  System.exit(1);
              }
  
              username = console.readLine("Enter username for atlas :- ");
  
              char[] pwdChar = console.readPassword("Enter password for atlas :- ");
              if (pwdChar != null) {
                  password = new String(pwdChar);
              }
          } catch (Exception e) {
              System.out.print("Error while reading user input");
              System.exit(1);
          }
  
          return new String[] {username, password};
      }
  }
  