在ASP.NET中实现DES加密与解密MD5加密功能介绍

public class TrialHelper    {    //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 EncryptDES( string encryptString, string encryptKey = "" )      {        try        {          if (string.IsNullOrEmpty(encryptKey) || encryptKey.Length < 8)          {            encryptKey = "winform01";          }          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>      /// <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 DecryptDES( string decryptString, string decryptKey = "" )      {        try        {          if (string.IsNullOrEmpty(decryptKey) || decryptKey.Length < 8)          {            decryptKey = "winform01";          }          byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));          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;        }      }      /// <summary>      /// MD5数据加密      /// </summary>      /// <param name="sDataIn">加密字段</param>      /// <returns>加密后的字符串</returns>      public static string GetMD5( string sDataIn )      {        System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();        byte[] bytValue, bytHash;        bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);        bytHash = md5.ComputeHash(bytValue);        md5.Clear();        string sTemp = "";        for (int i = 0; i < bytHash.Length; i++)        {          sTemp += bytHash[i].ToString("x").PadLeft(2, '0');        }        return sTemp;      }    }

调用：

//获取登录信息          loginRecord.Name = tbName.Text.Trim();          loginRecord.MD5Pwd = TrialHelper.GetMD5(tbPwd.Password); //保存到数据库MD5加密方式          loginRecord.Pwd = TrialHelper.EncryptDES(tbPwd.Password);//记住密码des加密方式，保存到本地

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