mcs/class/System.Configuration/System.Configuration/RsaProtectedConfigurationProvider.cs

   1 //
   2 // System.Configuration.RsaProtectedConfigurationProvider.cs
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30 using System.Xml;
  31 using System.IO;
  32 using System.Collections.Specialized;
  33 using System.Security.Cryptography;
  34 using System.Security.Cryptography.Xml;
  35
  36 namespace System.Configuration
  37 {
  38         public sealed class RsaProtectedConfigurationProvider: ProtectedConfigurationProvider
  39         {
  40                 string cspProviderName;
  41                 string keyContainerName;
  42                 bool useMachineContainer;
  43                 bool useOAEP;
  44
  45                 RSACryptoServiceProvider rsa;
  46
  47                 RSACryptoServiceProvider GetProvider ()
  48                 {
  49                         if (rsa == null) {
  50                                 CspParameters c = new CspParameters ();
  51                                 c.ProviderName = cspProviderName;
  52                                 c.KeyContainerName = keyContainerName;
  53                                 if (useMachineContainer)
  54                                         c.Flags |= CspProviderFlags.UseMachineKeyStore;
  55
  56                                 rsa = new RSACryptoServiceProvider (c);
  57                         }
  58
  59                         return rsa;
  60                 }
  61
  62                 public RsaProtectedConfigurationProvider ()
  63                 {
  64                 }
  65
  66                 [MonoTODO]
  67                 public override XmlNode Decrypt (XmlNode encrypted_node)
  68                 {
  69                         XmlDocument doc = new ConfigurationXmlDocument ();
  70
  71                         doc.Load (new StringReader (encrypted_node.OuterXml));
  72
  73                         EncryptedXml ex = new EncryptedXml (doc);
  74
  75                         ex.AddKeyNameMapping ("Rsa Key", GetProvider ());
  76
  77                         ex.DecryptDocument ();
  78
  79                         return doc.DocumentElement;
  80                 }
  81
  82                 [MonoTODO]
  83                 public override XmlNode Encrypt (XmlNode node)
  84                 {
  85                         XmlDocument doc = new ConfigurationXmlDocument ();
  86
  87                         doc.Load (new StringReader (node.OuterXml));
  88
  89                         EncryptedXml ex = new EncryptedXml (doc);
  90
  91                         ex.AddKeyNameMapping ("Rsa Key", GetProvider ());
  92
  93                         EncryptedData d = ex.Encrypt (doc.DocumentElement, "Rsa Key");
  94
  95                         return d.GetXml();
  96                 }
  97
  98                 [MonoTODO]
  99                 public override void Initialize (string name, NameValueCollection configurationValues)
 100                 {
 101                         string flag;
 102
 103                         base.Initialize (name, configurationValues);
 104
 105                         keyContainerName = configurationValues ["keyContainerName"];
 106                         cspProviderName = configurationValues ["cspProviderName"];
 107
 108                         flag = configurationValues ["useMachineContainer"];
 109                         if (flag != null && flag.ToLower() == "true")
 110                                 useMachineContainer = true;
 111
 112                         flag = configurationValues ["useOAEP"];
 113                         if (flag != null && flag.ToLower() == "true")
 114                                 useOAEP = true;
 115                 }
 116
 117                 [MonoTODO]
 118                 public void AddKey (int keySize, bool exportable)
 119                 {
 120                         throw new NotImplementedException ();
 121                 }
 122
 123                 [MonoTODO]
 124                 public void DeleteKey ()
 125                 {
 126                         throw new NotImplementedException ();
 127                 }
 128
 129                 [MonoTODO]
 130                 public void ExportKey (string xmlFileName, bool includePrivateParameters)
 131                 {
 132                         RSACryptoServiceProvider prov = GetProvider ();
 133                         string xml = prov.ToXmlString (includePrivateParameters);
 134
 135                         FileStream stream = new FileStream (xmlFileName, FileMode.OpenOrCreate, FileAccess.Write);
 136                         StreamWriter writer = new StreamWriter (stream);
 137
 138                         writer.Write (xml);
 139                         writer.Close ();
 140                 }
 141
 142                 [MonoTODO]
 143                 public void ImportKey (string xmlFileName, bool exportable)
 144                 {
 145                         throw new NotImplementedException ();
 146                 }
 147
 148                 public string CspProviderName
 149                 {
 150                         get { return cspProviderName; }
 151                 }
 152
 153                 public string KeyContainerName {
 154                         get { return keyContainerName; }
 155                 }
 156
 157                 public RSAParameters RsaPublicKey {
 158                         get {
 159                                 RSACryptoServiceProvider prov = GetProvider ();
 160                                 return prov.ExportParameters (false);
 161                         }
 162                 }
 163
 164                 public bool UseMachineContainer {
 165                         get { return useMachineContainer; }
 166                 }
 167
 168                 public bool UseOAEP {
 169                         get { return useOAEP; }
 170                 }
 171         }
 172 }
 173 #endif