/// <summary>
/// 初始化
/// </summary>
/// <param name="mac">账号(密钥)</param>
public Signature(Mac mac)
{
this.mac = mac;
}
/// <summary>
/// 一般初始化
/// </summary>
/// <param name="mac">账号(密钥)</param>
public Auth(Mac mac)
{
signature = new Signature(mac);
}
