.Net对称加密解密算法之一(DES方法)

直接看代码吧，最简单的方法，建立一个控制台程序。注意USING 的内容。

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("请输入你要加密的字符串:");
string x = Console.ReadLine();
string y;
y = Encrypting(x);
Console.WriteLine("加密后的结果是:");
Console.WriteLine(y);

Console.WriteLine("现在调用解密方法:");
string z;
z = Decrypting(y);
Console.WriteLine("解密后的结果是:");
Console.WriteLine(z);
Console.Read();
}


static public string Encrypting(string strSource)
{
//把字符串放到byte数组中
byte[] bytIn = System.Text.Encoding.Default.GetBytes(strSource);
//建立加密对象的密钥和偏移量
//使得输入密码必须输入英文文本
byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
//实例DES加密类
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = key;
mobjCryptoService.IV = iv;
mobjCryptoService.Mode = CipherMode.CBC;
ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
//实例MemoryStream流加密密文件
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(bytIn, 0, bytIn.Length);
cs.FlushFinalBlock();
return System.Convert.ToBase64String(ms.ToArray());
}

static public string Decrypting(string Source)
{

//将解密字符串转换成字节数组
byte[] bytIn = System.Convert.FromBase64String(Source);
//给出解密的密钥和偏移量，密钥和偏移量必须与加密时的密钥和偏移量相同
byte[] iv = { 102, 16, 93, 156, 78, 4, 218, 32 };//定义偏移量
byte[] key = { 55, 103, 246, 79, 36, 99, 167, 3 };//定义密钥
DESCryptoServiceProvider mobjCryptoService = new DESCryptoServiceProvider();
mobjCryptoService.Key = key;
mobjCryptoService.IV = iv;
//实例流进行解密
System.IO.MemoryStream ms = new System.IO.MemoryStream(bytIn, 0, bytIn.Length);
ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
StreamReader strd = new StreamReader(cs, Encoding.Default);
return strd.ReadToEnd();
}


}
}

From：一号门