使用加密服务提供程序 (CSP) 提供的实现来实现加密随机数生成器 (RNG)

使用加密服务提供程序 (CSP) 提供的实现来实现加密随机数生成器 (RNG)：RNGCryptoServiceProvider类，

命名空间:System.Security.Cryptography

 

MSDN的例子：

using System;

using System.IO;

using System.Text;

using System.Security.Cryptography;

 

class RNGCSP

{

        // Main method.

        public static void Main()

        {

                // Roll the dice 30 times and display

                // the results to the console.

                for(int x = 0; x <= 30; x++)

                {

                        Console.Write(RollDice(255).ToString("0000") + " ");

                        if((x+1) % 10 == 0)

                                Console.WriteLine();

                }

                Console.WriteLine();

        }

   

        // This method simulates a roll of the dice. The input parameter is the

        // number of sides of the dice.

        public static int RollDice(int NumSides)

        {

                // Create a byte array to hold the random value.

                byte[] randomNumber = new byte[1];

 

                // Create a new instance of the RNGCryptoServiceProvider.

                RNGCryptoServiceProvider Gen = new RNGCryptoServiceProvider();

 

                // Fill the array with a random value.

                Gen.GetBytes(randomNumber);

 

                // Convert the byte to an integer value to make the modulus operation easier.

                int rand = Convert.ToInt32(randomNumber[0]);

 

                // Return the random number mod the number

                // of sides.  The possible values are zero-

                // based, so we add one.

                return rand % NumSides + 1;

        }

}