import os

def imageDecode(dat_dir,dat_file_name):
  dat_read = open(dat_dir, "rb")
  if not os.path.exists(target_path):
    os.makedirs(target_path)
  out=target_path+"\\"+dat_file_name+".png"
  png_write = open(out, "wb")
  for now in dat_read:
    for nowByte in now:
      newByte = nowByte ^ xor_value
      png_write.write(bytes([newByte]))
  dat_read.close()
  png_write.close()

def findFile(dat_path):
  fsinfo = os.listdir(dat_path)
  for dat_file_name in fsinfo:
    temp_path = os.path.join(dat_path, dat_file_name)
    if not os.path.isdir(temp_path):
      print('文件路径: {}' .format(temp_path))
      imageDecode(temp_path,dat_file_name)
    else:
      pass
            
if __name__=='__main__':

	# 修改dat文件的存放路径
  dat_path = r'C:\Users\zhang\Desktop\dat_dir'
  
  # 修改转换成png图片后的存放路径
  target_path = r'C:\Users\zhang\Desktop\dat_dir\image'
  
  # 修改加密的异或值
  xor_value = 0x5f
  
  findFile(dat_path)