mcs/class/System.Configuration/System.Configuration/ProtectedConfigurationSection.cs

   1 //
   2 // System.Configuration.ProtectedConfigurationSection.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Chris Toshok (toshok@ximian.com)
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining
   9 // a copy of this software and associated documentation files (the
  10 // "Software"), to deal in the Software without restriction, including
  11 // without limitation the rights to use, copy, modify, merge, publish,
  12 // distribute, sublicense, and/or sell copies of the Software, and to
  13 // permit persons to whom the Software is furnished to do so, subject to
  14 // the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be
  17 // included in all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 //
  27 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  28 //
  29
  30 #if NET_2_0
  31
  32 using System.IO;
  33 using System.Xml;
  34
  35 namespace System.Configuration
  36 {
  37         public sealed class ProtectedConfigurationSection: ConfigurationSection
  38         {
  39                 static ConfigurationProperty defaultProviderProp;
  40                 static ConfigurationProperty providersProp;
  41                 static ConfigurationPropertyCollection properties;
  42
  43                 ProtectedConfigurationProviderCollection providers;
  44
  45                 static ProtectedConfigurationSection ()
  46                 {
  47                         defaultProviderProp = new ConfigurationProperty ("defaultProvider", typeof (string), "RsaProtectedConfigurationProvider");
  48                         providersProp = new ConfigurationProperty ("providers", typeof (ProviderSettingsCollection), null);
  49
  50                         properties = new ConfigurationPropertyCollection();
  51                         properties.Add (defaultProviderProp);
  52                         properties.Add (providersProp);
  53                 }
  54
  55                 [ConfigurationProperty ("defaultProvider", DefaultValue="RsaProtectedConfigurationProvider")]
  56                 public string DefaultProvider {
  57                         get { return (string)base[defaultProviderProp]; }
  58                         set { base[defaultProviderProp] = value; }
  59                 }
  60
  61                 [ConfigurationProperty ("providers")]
  62                 public ProviderSettingsCollection Providers {
  63                         get { return (ProviderSettingsCollection)base[providersProp]; }
  64                 }
  65
  66                 protected internal override ConfigurationPropertyCollection Properties {
  67                         get { return properties; }
  68                 }
  69
  70                 internal string EncryptSection (string clearXml, ProtectedConfigurationProvider protectionProvider)
  71                 {
  72                         XmlDocument doc = new ConfigurationXmlDocument ();
  73                         doc.LoadXml (clearXml);
  74
  75                         XmlNode encryptedNode = protectionProvider.Encrypt (doc.DocumentElement);
  76
  77                         return encryptedNode.OuterXml;
  78                 }
  79
  80                 internal string DecryptSection (string encryptedXml, ProtectedConfigurationProvider protectionProvider)
  81                 {
  82                         XmlDocument doc = new ConfigurationXmlDocument ();
  83                         doc.InnerXml = encryptedXml;
  84
  85                         XmlNode decryptedNode = protectionProvider.Decrypt (doc.DocumentElement);
  86
  87                         return decryptedNode.OuterXml;
  88                 }
  89
  90                 internal ProtectedConfigurationProviderCollection GetAllProviders ()
  91                 {
  92                         if (providers == null) {
  93                                 providers = new ProtectedConfigurationProviderCollection ();
  94
  95                                 foreach (ProviderSettings ps in Providers) {
  96                                         providers.Add (InstantiateProvider (ps));
  97                                 }
  98                         }
  99
 100                         return providers;
 101                 }
 102
 103                 ProtectedConfigurationProvider InstantiateProvider (ProviderSettings ps)
 104                 {
 105                         Type t = Type.GetType (ps.Type, true);
 106                         ProtectedConfigurationProvider prov = Activator.CreateInstance (t) as ProtectedConfigurationProvider;
 107                         if (prov == null)
 108                                 throw new Exception ("The type specified does not extend ProtectedConfigurationProvider class.");
 109
 110                         prov.Initialize (ps.Name, ps.Parameters);
 111
 112                         return prov;
 113                 }
 114         }
 115 }
 116 #endif