code: public static String shaBase64(final String salt, final String data, final String separator, final boolean chunked) {
          val result = rawDigest(MessageDigestAlgorithms.SHA_1, salt, separator == null ? data : data + separator);
          return EncodingUtils.encodeBase64(result, chunked);
      }
docs: Sha base 64 string.
  
  @param salt      the salt
  @param data      the data
  @param separator a string separator, if any
  @param chunked   the chunked
  @return the string