数据加密解密类(C#)

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       1 
    
      using
    
       System;

    
       2 
    
      
    
      using
    
       System.Data;

    
       3 
    
      
    
      using
    
       System.Configuration;

    
       4 
    
      
    
      using
    
       System.Web;

    
       5 
    
      
    
      using
    
       System.Web.Security;

    
       6 
    
      
    
      using
    
       System.Web.UI;

    
       7 
    
      
    
      using
    
       System.Web.UI.WebControls;

    
       8 
    
      
    
      using
    
       System.Web.UI.WebControls.WebParts;

    
       9 
    
      
    
      using
    
       System.Web.UI.HtmlControls;

    
      10 
    
      
    
      using
    
       System.Security.Cryptography;

    
      11 
    
      
    
      using
    
       System.IO;

    
      12 
    
      

    
      13 
    
      
    
      ///
    
       
    
      <summary>
    
      

    
      14 
    
      
    
      ///
    
       密码控制

    
      15 
    
      
    
      ///
    
       
    
      </summary>
    
      

    
      16 
    
      
    
      public
    
       
    
      class
    
       Class_Password

    
      17 
    
      {

    
      18 
    
       
    
      const
    
       
    
      string
    
       KEY_64 
    
      =
    
       
    
      "
    
      VavicApp
    
      "
    
      ;
    
      //
    
      注意了，是8个字符，64位
    
      

    
      19 
    
      
    
      

    
      20 
    
       
    
      const
    
       
    
      string
    
       IV_64 
    
      =
    
       
    
      "
    
      VavicApp
    
      "
    
      ;

    
      21 
    
      

    
      22 
    
       
    
      public
    
       Class_Password()

    
      23 
    
       {

    
      24 
    
       
    
      //
    
      

    
      25 
    
       
    
      //
    
       TODO: 在此处添加构造函数逻辑

    
      26 
    
       
    
      //

    
      27 
    
      
    
       }

    
      28 
    
      

    
      29 
    
       
    
      #region
    
       EnCode 加密
    
      

    
      30 
    
       
    
      ///
    
       
    
      <summary>
    
      

    
      31 
    
       
    
      ///
    
       EnCode 加密

    
      32 
    
       
    
      ///
    
       
    
      </summary>
    
      

    
      33 
    
       
    
      ///
    
       
    
      <param name="str">
    
      要加密的字符串
    
      </param>
    
      

    
      34 
    
       
    
      ///
    
       
    
      <returns></returns>
    
      

    
      35 
    
      
    
       

    
      36 
    
       
    
      public
    
       
    
      string
    
       EnCode(
    
      string
    
       data)

    
      37 
    
       {

    
      38 
    
       
    
      byte
    
      [] byKey 
    
      =
    
       System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);

    
      39 
    
       
    
      byte
    
      [] byIV 
    
      =
    
       System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

    
      40 
    
      

    
      41 
    
       DESCryptoServiceProvider cryptoProvider 
    
      =
    
       
    
      new
    
       DESCryptoServiceProvider();

    
      42 
    
       
    
      int
    
       i 
    
      =
    
       cryptoProvider.KeySize;

    
      43 
    
       MemoryStream ms 
    
      =
    
       
    
      new
    
       MemoryStream();

    
      44 
    
       CryptoStream cst 
    
      =
    
       
    
      new
    
       CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey,

    
      45 
    
      

    
      46 
    
      byIV), CryptoStreamMode.Write);

    
      47 
    
      

    
      48 
    
       StreamWriter sw 
    
      =
    
       
    
      new
    
       StreamWriter(cst);

    
      49 
    
       sw.Write(data);

    
      50 
    
       sw.Flush();

    
      51 
    
       cst.FlushFinalBlock();

    
      52 
    
       sw.Flush();

    
      53 
    
       
    
      return
    
       Convert.ToBase64String(ms.GetBuffer(), 
    
      0
    
      , (
    
      int
    
      )ms.Length);

    
      54 
    
       }

    
      55 
    
       
    
      #endregion
    
      

    
      56 
    
      

    
      57 
    
       
    
      #region
    
       DeCode 解密
    
      

    
      58 
    
       
    
      ///
    
       
    
      <summary>
    
      

    
      59 
    
       
    
      ///
    
       DeCode 解密

    
      60 
    
       
    
      ///
    
       
    
      </summary>
    
      

    
      61 
    
       
    
      ///
    
       
    
      <param name="str">
    
      要解密的字符串
    
      </param>
    
      

    
      62 
    
       
    
      ///
    
       
    
      <returns></returns>
    
      

    
      63 
    
      
    
       
    
      public
    
       
    
      string
    
       DeCode(
    
      string
    
       data)

    
      64 
    
       {

    
      65 
    
       
    
      byte
    
      [] byKey 
    
      =
    
       System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);

    
      66 
    
       
    
      byte
    
      [] byIV 
    
      =
    
       System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

    
      67 
    
      

    
      68 
    
       
    
      byte
    
      [] byEnc;

    
      69 
    
       
    
      try
    
      

    
      70 
    
       {

    
      71 
    
       byEnc 
    
      =
    
       Convert.FromBase64String(data);

    
      72 
    
       }

    
      73 
    
       
    
      catch
    
      

    
      74 
    
       {

    
      75 
    
       
    
      return
    
       
    
      null
    
      ;

    
      76 
    
       }

    
      77 
    
      

    
      78 
    
       DESCryptoServiceProvider cryptoProvider 
    
      =
    
       
    
      new
    
       DESCryptoServiceProvider();

    
      79 
    
       MemoryStream ms 
    
      =
    
       
    
      new
    
       MemoryStream(byEnc);

    
      80 
    
       CryptoStream cst 
    
      =
    
       
    
      new
    
       CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey,

    
      81 
    
      

    
      82 
    
      byIV), CryptoStreamMode.Read);

    
      83 
    
       StreamReader sr 
    
      =
    
       
    
      new
    
       StreamReader(cst);

    
      84 
    
       
    
      return
    
       sr.ReadToEnd();

    
      85 
    
       }

    
      86 
    
       
    
      #endregion
    
      

    
      87 
    
      

    
      88 
    
      }