/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2018 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.qa.glnm.format;
  
  import java.nio.charset.StandardCharsets;
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import java.util.Base64;
  
  import org.apache.commons.codec.digest.MessageDigestAlgorithms;
  
  import io.wcm.qa.glnm.exceptions.GaleniumException;
  
  final class Md5Util {
  
    private Md5Util() {
      // do not instantiate
    }
  
    /**
     * <p>getMd5AsAscii.</p>
     *
     * @param input a byte array.
     * @return a {@link java.lang.String} object.
     * @since 3.0.0
     */
    public static String getMd5AsAscii(byte[] input) {
      try {
        MessageDigest digest = MessageDigest.getInstance(MessageDigestAlgorithms.MD5);
        byte[] digestedBytes = digest.digest(input);
        return getBytesAsAscii(digestedBytes);
      }
      catch (NoSuchAlgorithmException ex) {
        throw new GaleniumException("Java not remembering MD5.", ex);
      }
    }
  
    private static String getBytesAsAscii(byte[] bytesToEncode) {
      byte[] encodedBytes = Base64.getEncoder().encode(bytesToEncode);
      return new String(encodedBytes, StandardCharsets.US_ASCII);
    }
  
  }