/// <summary>
/// 构造新的DES流
/// </summary>
/// <param name="inputReader">待加密/解密输入流</param>
/// <param name="inputKey">密钥</param>
/// <param name="inputWriter">结果输出流</param>
/// <param name="inputIV">初始向量，解密时不需要提供</param>
public DESStream(BinaryReader inputReader, Bitset inputKey, BinaryWriter inputWriter, Bitset inputIV = null)
{
reader = inputReader;
writer = inputWriter;
key = inputKey;
DES = new DESAlgorithm();
if (inputIV != null)
{
IV = inputIV;
}
else
{
IV = new Bitset(64);
}
}