[DEncrypt] DESEncrypt--加密/解密帮助类 （转载）

点击下载 DESEncrypt.zip

这个类是关于加密，解密的操作，文件的一些高级操作
1.DESEncrypt加密
2.DESEncrypt解密
看下面代码吧

/// <summary>
/// 类说明：Assistant
/// 编 码 人：苏飞
/// 联系方式：361983679
/// 更新网站：[url=http://www.cckan.net/thread-655-1-1.html]http://www.cckan.net/thread-655-1-1.html[/url]
/// </summary>
using System;
using System.Security.Cryptography;
using System.Text;
namespace DotNet.Utilities
{
  /// <summary>
  /// DES加密/解密类。
  /// </summary>
  public class DESEncrypt
  {
    public DESEncrypt()
    {
    }

    #region ========加密======== 

        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
    public static string Encrypt(string Text)
    {
      return Encrypt(Text,"MATICSOFT");
    }
    /// <summary>
    /// 加密数据
    /// </summary>
    /// <param name="Text"></param>
    /// <param name="sKey"></param>
    /// <returns></returns>
    public static string Encrypt(string Text,string sKey)
    {
      DESCryptoServiceProvider des = new DESCryptoServiceProvider();
      byte[] inputByteArray;
      inputByteArray=Encoding.Default.GetBytes(Text);
      des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));
      des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));
      System.IO.MemoryStream ms=new System.IO.MemoryStream();
      CryptoStream cs=new CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write);
      cs.Write(inputByteArray,,inputByteArray.Length);
      cs.FlushFinalBlock();
      StringBuilder ret=new StringBuilder();
      foreach( byte b in ms.ToArray())
      {
        ret.AppendFormat("{0:X2}",b);
      }
      return ret.ToString();
    } 

    #endregion

    #region ========解密======== 

        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
    public static string Decrypt(string Text)
    {
      return Decrypt(Text,"MATICSOFT");
    }
    /// <summary>
    /// 解密数据
    /// </summary>
    /// <param name="Text"></param>
    /// <param name="sKey"></param>
    /// <returns></returns>
    public static string Decrypt(string Text,string sKey)
    {
      DESCryptoServiceProvider des = new DESCryptoServiceProvider();
      int len;
      len=Text.Length/;
      byte[] inputByteArray = new byte[len];
      int x,i;
      for(x=;x<len;x++)
      {
        i = Convert.ToInt32(Text.Substring(x * , ), );
        inputByteArray[x]=(byte)i;
      }
      des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));
      des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(, ));
      System.IO.MemoryStream ms=new System.IO.MemoryStream();
      CryptoStream cs=new CryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write);
      cs.Write(inputByteArray,,inputByteArray.Length);
      cs.FlushFinalBlock();
      return Encoding.Default.GetString(ms.ToArray());
    } 

    #endregion 

  }
}

使用方法也很简单直接调用方法就行了如下

DESEncrypt.Encrypt("要加密的字符串");
          DESEncrypt.Decrypt("要解密的字符串");