问题 A: DES对称加密算法

题目描述
参考相关文献，设计一个DES对称加密算法。并编写一个控制台应用予以验证。密钥设定为：@1234567。
class Program{
//验证DES加密算法
static void Main(string[] args){
Console.WriteLine(Class1.ECP(“absg123@&!”));
}
}

public class Class1 {
    //下面ECP方法功能为采用对称加密算法
    //该算法原理请大家百度
    const string KEY_64 = "@1234567";
    const string IV_64 = "@1234567";
    public static string ECP(string data)      {
          //这里编写DES对称加密算法代码
    }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;
using System.IO;
namespace ConsoleApplication1
{
    class Program
    {
        //验证DES加密算法
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            Console.WriteLine(Class1.ECP(input, "@1234567"));
        }
    }
    public class Class1
    {
        //下面ECP方法功能为采用对称加密算法
        //该算法原理请大家百度
        public static string ECP(string encryptString, string encryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                byte[] rgbIV = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Convert.ToBase64String(mStream.ToArray());
            }
            catch
            {
                return encryptString;
            }
        }
    }

}

直接搬运https://www.cnblogs.com/mjn1/p/12507850.html