加密和解密.net配置节

  
    

   
     public
   
      
   
     static
   
      
   
     class
   
      ProtectConfigFileUtil
{
 
   
     ///
   
      
   
     <summary>
   
     
 
   
     ///
   
      加密配置节示例，加密 ConnectionStrings 和 AppSettings
 
   
     ///
   
      
   
     </summary>
   
     

   
      [Obsolete(
   
     "
   
     这个方法只是示例
   
     "
   
     )]
 
   
     public
   
      
   
     static
   
      
   
     void
   
      ProtectConnectionStringsAndAppSettings(HttpContext context)
 {
 Configuration config 
   
     =
   
      WebConfigurationManager.OpenWebConfiguration(context.Request.ApplicationPath);

 
   
     //
   
     ' Define the Dpapi provider name.
   
     

   
      String provider 
   
     =
   
      
   
     "
   
     DataProtectionConfigurationProvider
   
     "
   
     ;

 ProtectSection(config.ConnectionStrings, provider);
 ProtectSection(config.AppSettings, provider);

 config.Save(System.Configuration.ConfigurationSaveMode.Modified);
 }

 
   
     ///
   
      
   
     <summary>
   
     
 
   
     ///
   
      加密一个配置节
 
   
     ///
   
      
   
     </summary>
   
     
 
   
     ///
   
      
   
     <param name="section"></param>
   
     
 
   
     ///
   
      
   
     <param name="provider"></param>
   
     
 
   
     ///
   
      
   
     <returns></returns>
   
     

   
      
   
     public
   
      
   
     static
   
      
   
     bool
   
      ProtectSection(ConfigurationSection section, String provider)
 {
 
   
     if
   
      (section 
   
     !=
   
      
   
     null
   
     
 
   
     &&
   
      
   
     !
   
     section.SectionInformation.IsProtected
 
   
     &&
   
      
   
     !
   
     section.ElementInformation.IsLocked)
 {
 
   
     //
   
      ' Protect the section.
   
     

   
      section.SectionInformation.ProtectSection(provider);
 section.SectionInformation.ForceSave 
   
     =
   
      
   
     true
   
     ;
 
   
     return
   
      
   
     true
   
     ;
 }

 
   
     return
   
      
   
     false
   
     ;
 }
 
   
     ///
   
      
   
     <summary>
   
     
 
   
     ///
   
      解密一个配置节
 
   
     ///
   
      
   
     </summary>
   
     
 
   
     ///
   
      
   
     <param name="section"></param>
   
     
 
   
     ///
   
      
   
     <returns></returns>
   
     

   
      
   
     public
   
      
   
     static
   
      
   
     bool
   
      UnprotectSection(ConfigurationSection section)
 {
 
   
     if
   
      (section 
   
     !=
   
      
   
     null
   
     
 
   
     &&
   
      
   
     !
   
     section.SectionInformation.IsProtected
 
   
     &&
   
      
   
     !
   
     section.ElementInformation.IsLocked)
 {
 
   
     //
   
      ' Protect the section.
   
     

   
      section.SectionInformation.UnprotectSection();
 section.SectionInformation.ForceSave 
   
     =
   
      
   
     true
   
     ;
 
   
     return
   
      
   
     true
   
     ;
 }

 
   
     return
   
      
   
     false
   
     ;
 }


}