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
   *
   *     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.cassandra.sidecar.utils;
  
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import java.util.Base64;
  
  /**
   * Provides the MD5 implementation from JDK
   */
  public class JdkMd5DigestProvider implements DigestAlgorithmProvider
  {
      @Override
      public DigestAlgorithm get(int seed)
      {
          return new JdkMD5Digest();
      }
  
      /**
       * MD5 implementation from JDK
       */
      public static class JdkMD5Digest implements DigestAlgorithm
      {
          private final MessageDigest md5;
  
          public JdkMD5Digest()
          {
              try
              {
                  this.md5 = MessageDigest.getInstance("MD5");
              }
              catch (NoSuchAlgorithmException ex)
              {
                  throw new RuntimeException(ex);
              }
          }
  
          @Override
          public void update(byte[] buf, int off, int len)
          {
              md5.update(buf, off, len);
          }
  
          @Override
          public String digest()
          {
              return Base64.getEncoder().encodeToString(md5.digest());
          }
  
          @Override
          public void close()
          {
              // MessageDigest does not require to be closed
          }
      }
  
  }
  