asp.net中加密狗 代码

程序代码

using ...System.Runtime.InteropServices ;
public unsafe class Dog
{

    public uint DogBytes, DogAddr;  //设置加密狗字节长度和起始地址

    public byte[] DogData;  //设置数据的长度

    public uint Retcode;

    [DllImport("Win32dll.dll", CharSet = CharSet.Ansi)]

    public static unsafe extern uint DogRead(uint idogBytes, uint idogAddr, byte* pdogData);

    [DllImport("Win32dll.dll", CharSet = CharSet.Ansi)]

    public static unsafe extern uint DogWrite(uint idogBytes, uint idogAddr, byte* pdogData);

public unsafe Dog(ushort num)

   {

        DogBytes = num;

        DogData = new byte[DogBytes]; //设置数据的长度

    }

    public unsafe void ReadDog()

   {

        fixed (byte* pDogData = &DogData[0])

        {

            Retcode = DogRead(DogBytes, DogAddr, pDogData);　　//将数据读出加密狗

        }

    }

    public unsafe void WriteDog()

    {

        fixed (byte* pDogData = &DogData[0])

        {

            Retcode = DogWrite(DogBytes, DogAddr, pDogData);　//将数据写入加密狗

        }

    }

}

向加密狗里边写入数据:Dog d=new Dog(10);d.DogAddr=0;for(int i=0;i<d.DogData.length;i++)d.DogData[i]=i;d.WriteDog();

读取加密狗里边的数据:Dog d=new Dog(10);byte[] b;d.ReadDog();b=new byte[d.DogData.length];

for (int i=0;i<d.DogData.lengh;i++)b[i]=d.DogData[i];

extern:表明我们用到的该方法是在外部声明的,即该方法是在win32dll.dll程序集里边;

unsafe:表明该加密狗类是不安全的.