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; } } }