content: /*
   * MIT License
   *
   * Copyright (c) 2018 Alibaba Group
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  package com.tmall.wireless.vaf.virtualview.Helper;
  
  import android.text.TextUtils;
  import com.libra.virtualview.common.Common;
  import com.tmall.wireless.vaf.virtualview.loader.CodeReader;
  
  /**
   * Created by longerian on 2017/9/6.
   *
   * @author longerian
   * @date 2017/09/06
   */
  
  public class VerificationUtil {
  
      private static CodeReader codeReader = new CodeReader();
  
      public static boolean checkFormat(byte[] data) {
          if (data == null) {
              return false;
          }
          int tagLen = Common.TAG.length();
          if (data.length < tagLen) {
              return false;
          }
          String tag = new String(data, 0, tagLen);
          return TextUtils.equals(Common.TAG, tag);
      }
  
      public static boolean checkMajorMinorVersion(byte[] data) {
          codeReader.release();
          codeReader.setCode(data);
          codeReader.seekBy(Common.TAG.length());
          int majorVersion = codeReader.readShort();
          int minorVersion = codeReader.readShort();
          return majorVersion == Common.MAJOR_VERSION && minorVersion == Common.MINOR_VERSION;
      }
  
      public static boolean checkPatchVersion(byte[] data, short target) {
          codeReader.release();
          codeReader.setCode(data);
          codeReader.seekBy(Common.TAG.length() + 4);
          int version = codeReader.readShort();
          return version == target;
      }
  
      public static boolean checkContentLength(byte[] data) {
          if (data == null) {
              return false;
          }
          return data.length >= 58;
      }
  
  }
  