C#实现简单的3DES加密解密功能示例

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Security.Cryptography;using System.IO;namespace _3DES{  public partial class Form1 : Form  {    public Form1()    {      InitializeComponent();    }    private void CrypeBtn_Click(object sender, EventArgs e)    {      //实例化三倍DES服务提供者类      TripleDESCryptoServiceProvider TDES = new TripleDESCryptoServiceProvider();      //随机生成密钥和IV向量      TDES.GenerateIV();      TDES.GenerateKey();      //执行加密      byte[] EncrypeByte = EncrypText(StrBox.Text, TDES.Key, TDES.IV);      //显示密文和密钥      KeyBox.Text = Encoding.ASCII.GetString(TDES.Key);      IVBox.Text = Encoding.ASCII.GetString(TDES.IV);      CrypeBox.Text = Encoding.UTF8.GetString(EncrypeByte);      //执行解密      Str2Box.Text = DecrypText(EncrypeByte, TDES.Key, TDES.IV);    }    #region 加密    /// <summary>    /// 执行三倍DES加密的方法    /// </summary>    /// <param name="Str">明文字符串</param>    /// <param name="Key">密钥</param>    /// <param name="IV">IV向量</param>    /// <returns>密文的字节序列</returns>    private byte[] EncrypText(string Str, byte[] Key, byte[] IV)    {      //创建一个内存流，用于存放密文      MemoryStream MS = new MemoryStream();      //创建一个三倍DES服务提供者对象      TripleDESCryptoServiceProvider TDES = new TripleDESCryptoServiceProvider();      //创建一个加密流，用于加密操作      CryptoStream CS = new CryptoStream(MS,        TDES.CreateEncryptor(Key, IV),        CryptoStreamMode.Write);      //定义输入，执行加密操作      CS.Write(Encoding.UTF8.GetBytes(Str), 0, Str.Length);      CS.FlushFinalBlock();      //返回将密文的内存流转换为字节序列并返回      return MS.ToArray();    }    #endregion    #region 解密    /// <summary>    /// 执行三倍DES解密的方法    /// </summary>    /// <param name="CrypeText">密文的字节序列</param>    /// <param name="Key">密钥</param>    /// <param name="IV">IV向量</param>    /// <returns>明文的字符串</returns>    private string DecrypText(byte[] CrypeText, byte[] Key, byte[] IV)    {      //创建一个内存流，用于存放密文      MemoryStream MS = new MemoryStream(CrypeText);      //创建一个三倍DES服务提供者对象      TripleDESCryptoServiceProvider TDES = new TripleDESCryptoServiceProvider();      //创建解密流      CryptoStream CS = new CryptoStream(MS,        TDES.CreateDecryptor(Key, IV),        CryptoStreamMode.Read);      //创建一个用于存放明文的容器（字节序列）      byte[] DecrypeBytes = new byte[CrypeText.Length];      //执行解密      CS.Read(DecrypeBytes, 0, CrypeText.Length);      //返回解密后的明文字符串      return Encoding.UTF8.GetString(DecrypeBytes);    }    #endregion  }}