C#DES加密

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Text;

using System.Windows.Forms;

using System.Security.Cryptography;//加密部分

using System.IO;

 

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

 

        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

        private static string keyUse = "12345678";

        private static string keyDe = "12345678";

        /// <summary>

        /// DES加密字符串

        /// </summary>

        /// <param name="encryptString">待加密的字符串

        /// <param name="encryptKey">加密密钥,要求为8位

        /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>

        public static string EncryptDES(string encryptString, string encryptKey)

        {

            try

            {

                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));

                byte[] rgbIV = Keys;

                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;

            }

        }

 

        /// <summary>

        /// DES解密字符串

        /// </summary>

        /// <param name="decryptString">待解密的字符串

        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同

        /// <returns>解密成功返回解密后的字符串，失败返源串</returns>

        public static string DecryptDES(string decryptString, string decryptKey)

        {

            try

            {

                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);

                byte[] rgbIV = Keys;

                byte[] inputByteArray = Convert.FromBase64String(decryptString);

                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

                MemoryStream mStream = new MemoryStream();

                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

                cStream.Write(inputByteArray, 0, inputByteArray.Length);

                cStream.FlushFinalBlock();

                return Encoding.UTF8.GetString(mStream.ToArray());

            }

            catch

            {

                return decryptString;

            }

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            string strOrg = TB_ORG.Text;

            string tmp = System.Text.Encoding.Default.GetString(Keys);//[].ToString();//BitConverter.ToString(Keys).Replace("-", string.Empty);// Keys.ToString();

            string strEp = EncryptDES(strOrg, keyUse);

            TB_EP.Text = strEp;

        }

 

        private void button2_Click(object sender, EventArgs e)

        {

            string strEp = TB_EP.Text;

            string tmp = System.Text.Encoding.Default.GetString(Keys);//BitConverter.ToString(Keys).Replace("-", string.Empty);// Keys.ToString();

            string strDe = DecryptDES(strEp, keyDe);

            TB_DE.Text = strDe;

        }

    }

}