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 using System.Xml;
  30 using System.IO;
  31 using System.Collections.Specialized;
  32 using System.Security.Cryptography;
  33 using System.Security.Cryptography.Xml;
  34
  35 namespace System.Configuration
  36 {
  37         public sealed class RsaProtectedConfigurationProvider: ProtectedConfigurationProvider
  38         {
  39                 string cspProviderName;
  40                 string keyContainerName;
  41                 bool useMachineContainer;
  42                 bool useOAEP;
  43
  44                 RSACryptoServiceProvider rsa;
  45
  46                 RSACryptoServiceProvider GetProvider ()
  47                 {
  48                         if (rsa == null) {
  49                                 CspParameters c = new CspParameters ();
  50                                 c.ProviderName = cspProviderName;
  51                                 c.KeyContainerName = keyContainerName;
  52                                 if (useMachineContainer)
  53                                         c.Flags |= CspProviderFlags.UseMachineKeyStore;
  54
  55                                 rsa = new RSACryptoServiceProvider (c);
  56                         }
  57
  58                         return rsa;
  59                 }
  60
  61                 public RsaProtectedConfigurationProvider ()
  62                 {
  63                 }
  64
  65                 [MonoTODO]
  66                 public override XmlNode Decrypt (XmlNode encrypted_node)
  67                 {
  68                         XmlDocument doc = new ConfigurationXmlDocument ();
  69
  70                         doc.Load (new StringReader (encrypted_node.OuterXml));
  71
  72                         EncryptedXml ex = new EncryptedXml (doc);
  73
  74                         ex.AddKeyNameMapping ("Rsa Key", GetProvider ());
  75
  76                         ex.DecryptDocument ();
  77
  78                         return doc.DocumentElement;
  79                 }
  80
  81                 [MonoTODO]
  82                 public override XmlNode Encrypt (XmlNode node)
  83                 {
  84                         XmlDocument doc = new ConfigurationXmlDocument ();
  85
  86                         doc.Load (new StringReader (node.OuterXml));
  87
  88                         EncryptedXml ex = new EncryptedXml (doc);
  89
  90                         ex.AddKeyNameMapping ("Rsa Key", GetProvider ());
  91
  92                         EncryptedData d = ex.Encrypt (doc.DocumentElement, "Rsa Key");
  93
  94                         return d.GetXml();
  95                 }
  96
  97                 [MonoTODO]
  98                 public override void Initialize (string name, NameValueCollection configurationValues)
  99                 {
 100                         string flag;
 101
 102                         base.Initialize (name, configurationValues);
 103
 104                         keyContainerName = configurationValues ["keyContainerName"];
 105                         cspProviderName = configurationValues ["cspProviderName"];
 106
 107                         flag = configurationValues ["useMachineContainer"];
 108                         if (flag != null && flag.ToLower() == "true")
 109                                 useMachineContainer = true;
 110
 111                         flag = configurationValues ["useOAEP"];
 112                         if (flag != null && flag.ToLower() == "true")
 113                                 useOAEP = true;
 114                 }
 115
 116                 [MonoTODO]
 117                 public void AddKey (int keySize, bool exportable)
 118                 {
 119                         throw new NotImplementedException ();
 120                 }
 121
 122                 [MonoTODO]
 123                 public void DeleteKey ()
 124                 {
 125                         throw new NotImplementedException ();
 126                 }
 127
 128                 [MonoTODO]
 129                 public void ExportKey (string xmlFileName, bool includePrivateParameters)
 130                 {
 131                         RSACryptoServiceProvider prov = GetProvider ();
 132                         string xml = prov.ToXmlString (includePrivateParameters);
 133
 134                         FileStream stream = new FileStream (xmlFileName, FileMode.OpenOrCreate, FileAccess.Write);
 135                         StreamWriter writer = new StreamWriter (stream);
 136
 137                         writer.Write (xml);
 138                         writer.Close ();
 139                 }
 140
 141                 [MonoTODO]
 142                 public void ImportKey (string xmlFileName, bool exportable)
 143                 {
 144                         throw new NotImplementedException ();
 145                 }
 146
 147                 public string CspProviderName
 148                 {
 149                         get { return cspProviderName; }
 150                 }
 151
 152                 public string KeyContainerName {
 153                         get { return keyContainerName; }
 154                 }
 155
 156                 public RSAParameters RsaPublicKey {
 157                         get {
 158                                 RSACryptoServiceProvider prov = GetProvider ();
 159                                 return prov.ExportParameters (false);
 160                         }
 161                 }
 162
 163                 public bool UseMachineContainer {
 164                         get { return useMachineContainer; }
 165                 }
 166
 167                 public bool UseOAEP {
 168                         get { return useOAEP; }
 169                 }
 170         }
 171 }
 172