content: /*
   *  Copyright 2018 The shiro-root contributors
   *
   *  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 org.apache.shiro.util;
  
  import java.util.Arrays;
  
  public final class ByteUtils {
  
      private ByteUtils() {
          // private utility class
      }
  
      /**
       * For security, sensitive information in array should be zeroed-out at end of use (SHIRO-349).
       * @param value An array holding sensitive data
       */
      public static void wipe(Object value) {
          if (value instanceof byte[]) {
              byte[] array = (byte[]) value;
              Arrays.fill(array, (byte) 0);
          } else if (value instanceof char[]) {
              char[] array = (char[]) value;
              Arrays.fill(array, '\u0000');
          }
      }
  
  }
  