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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; } }}标签：
原文地址：http://www.cnblogs.com/linyijia/p/4766134.html
