//====================================================================== // 使用DES(数据加密算法)对数据进行加密/解密的类 //====================================================================== using System; using System.IO; using System.Security.Cryptography; using System.Text; namespace Encrypt { /// <summary> /// 使用DES(数据加密算法)对数据进行加密/解密的类 /// </summary> public sealed class DES { /// <summary> /// 加密密钥 /// </summary> public static readonly string SECRET = "L82V6ZVD6J"; public static readonly string WIRELESSSECRET = "JP248ADS0H"; //public static readonly string SECRET = "0123456789"; //默认密钥向量 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; /// <summary> /// DES加密字符串 /// </summary> /// <param name="encryptString">待加密的字符串</param> /// <param name="encryptKey">加密密钥,要求为8位</param> /// <returns>加密成功返回加密后的字符串,失败返回源串</returns> public static string Encode(string encryptString, string encryptKey) { encryptKey = GetSubString(encryptKey, 8, ""); encryptKey = encryptKey.PadRight(8, ' '); 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()); } /// <summary> /// DES解密字符串 /// </summary> /// <param name="decryptString">待解密的字符串</param> /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> /// <returns>解密成功返回解密后的字符串,失败返源串</returns> public static string Decode(string decryptString, string decryptKey) { try { decryptKey = GetSubString(decryptKey,0, 8, ""); decryptKey = decryptKey.PadRight(8, ' '); 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 ""; } } #region 截取字符串函数 /// <summary> /// 截取字符串函数 /// </summary> /// <param name="Str">所要截取的字符串</param> /// <param name="Num">截取字符串的长度</param> /// <returns></returns> public static string GetSubString(string Str, int Num) { if (Str == null || Str == "") { return ""; } string outstr = string.Empty; int n = 0; foreach (char ch in Str) { n += System.Text.Encoding.Default.GetByteCount(ch.ToString()); if (n > Num) { break; } else { outstr += ch; } } return outstr; } /// <summary> /// 截取字符串函数,如果超过指定长度则将超出的部分用指定字符串代替 /// </summary> /// <param name="Str">所要截取的字符串</param> /// <param name="Num">截取字符串的长度</param> /// <param name="Num">截取字符串后省略部分的字符串</param> /// <returns></returns> public static string GetSubString(string Str, int Num, string LastStr) { return GetSubString(Str, 0, Num, LastStr); } #endregion #region 截取字符串，超过部分用指定字符串替换 /* 宗波于 2010-6-12 日添加， 来源于DiscuzNt */ /// <summary> /// 取指定长度的字符串 /// </summary> /// <param name="p_SrcString">要检查的字符串</param> /// <param name="p_StartIndex">起始位置</param> /// <param name="p_Length">指定长度</param> /// <param name="p_TailString">用于替换的字符串</param> /// <returns>截取后的字符串</returns> public static string GetSubString(string p_SrcString, int p_StartIndex, int p_Length, string p_TailString) { string myResult = p_SrcString; Byte[] bComments = Encoding.UTF8.GetBytes(p_SrcString); foreach (char c in Encoding.UTF8.GetChars(bComments)) { //当是日文或韩文时(注:中文的范围:u4e00 - u9fa5, 日文在u0800 - u4e00, 韩文为xAC00-xD7A3) if ((c > 'u0800' && c < 'u4e00') || (c > 'xAC00' && c < 'xD7A3')) { //if (System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[u0800-u4e00]+") || System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[xAC00-xD7A3]+")) //当截取的起始位置超出字段串长度时 if (p_StartIndex >= p_SrcString.Length) return ""; else return p_SrcString.Substring(p_StartIndex, ((p_Length + p_StartIndex) > p_SrcString.Length) ? (p_SrcString.Length - p_StartIndex) : p_Length); } } if (p_Length >= 0) { byte[] bsSrcString = Encoding.Default.GetBytes(p_SrcString); //当字符串长度大于起始位置 if (bsSrcString.Length > p_StartIndex) { int p_EndIndex = bsSrcString.Length; //当要截取的长度在字符串的有效长度范围内 if (bsSrcString.Length > (p_StartIndex + p_Length)) { p_EndIndex = p_Length + p_StartIndex; } else { //当不在有效范围内时,只取到字符串的结尾 p_Length = bsSrcString.Length - p_StartIndex; p_TailString = ""; } int nRealLength = p_Length; int[] anResultFlag = new int[p_Length]; byte[] bsResult = null; int nFlag = 0; for (int i = p_StartIndex; i < p_EndIndex; i++) { if (bsSrcString[i] > 127) { nFlag++; if (nFlag == 3) nFlag = 1; } else nFlag = 0; anResultFlag[i] = nFlag; } if ((bsSrcString[p_EndIndex - 1] > 127) && (anResultFlag[p_Length - 1] == 1)) nRealLength = p_Length + 1; bsResult = new byte[nRealLength]; Array.Copy(bsSrcString, p_StartIndex, bsResult, 0, nRealLength); myResult = Encoding.Default.GetString(bsResult); myResult = myResult + p_TailString; } } return myResult; } #endregion } }
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.Web; namespace Encrypt { public partial class Main : Form { public Main() { InitializeComponent(); Sunisoft.IrisSkin.SkinEngine se = new Sunisoft.IrisSkin.SkinEngine(); se.SkinAllForm = true;//所有窗体应用此皮肤 se.SkinFile = @"....skinMSN.ssk"; } /// <summary> /// 加密 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void EncryptBtn_Click(object sender, EventArgs e) { if (!string.IsNullOrWhiteSpace(UnEncrypttxt.Text.Trim())) { Encrypttxt.Text = HttpUtility.UrlEncode(DES.Encode(UnEncrypttxt.Text.Trim(), DES.SECRET), Encoding.UTF8); } else { MessageBox.Show("请输入待加密字符串！"); } } /// <summary> /// 解密 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void UnEncryptBtn_Click(object sender, EventArgs e) { if (!string.IsNullOrWhiteSpace(Encrypttxt.Text.Trim())) { UnEncrypttxt.Text = DES.Decode(HttpUtility.UrlDecode(Encrypttxt.Text.Trim(), Encoding.UTF8), DES.SECRET); } else { MessageBox.Show("请输入待解密字符串！"); } } /// <summary> /// 生成cookie /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void cookieBtn_Click(object sender, EventArgs e) { if (string.IsNullOrWhiteSpace(UnEncrypttxt.Text.Trim())) { MessageBox.Show("请输入待加密字符串！"); return; } if (string.IsNullOrWhiteSpace(openidTxt.Text.Trim())) { MessageBox.Show("请输入openid！"); return; } cookieTxt.Text = string.Format("CooperateUserId={0}&openid={0}&MemberId={1}&MemberSysId=33", openidTxt.Text.Trim(), HttpUtility.UrlEncode(DES.Encode(UnEncrypttxt.Text.Trim(), DES.SECRET), Encoding.UTF8)); } } }