mcs/class/System.Web/System.Web.Configuration_2.0/MachineKeySection.cs

   1 //
   2 // System.Web.Configuration.MachineKeySection
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // (c) Copyright 2005 Novell, Inc (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.ComponentModel;
  33 using System.Configuration;
  34 using System.Security.Cryptography;
  35
  36 #if NET_2_0
  37
  38 namespace System.Web.Configuration {
  39
  40         public sealed class MachineKeySection : ConfigurationSection
  41         {
  42                 static ConfigurationProperty decryptionProp;
  43                 static ConfigurationProperty decryptionKeyProp;
  44                 static ConfigurationProperty validationProp;
  45                 static ConfigurationProperty validationKeyProp;
  46                 static ConfigurationPropertyCollection properties;
  47
  48                 static MachineKeySection ()
  49                 {
  50                         decryptionProp = new ConfigurationProperty ("decryption", typeof (string), "Auto",
  51                                                                     PropertyHelper.WhiteSpaceTrimStringConverter,
  52                                                                     PropertyHelper.NonEmptyStringValidator,
  53                                                                     ConfigurationPropertyOptions.None);
  54                         decryptionKeyProp = new ConfigurationProperty ("decryptionKey", typeof (string), "AutoGenerate,IsolateApps",
  55                                                                        PropertyHelper.WhiteSpaceTrimStringConverter,
  56                                                                        PropertyHelper.NonEmptyStringValidator,
  57                                                                        ConfigurationPropertyOptions.None);
  58                         validationProp = new ConfigurationProperty ("validation", typeof (MachineKeyValidation), MachineKeyValidation.SHA1,
  59                                                                     new MachineKeyValidationConverter (),
  60                                                                     PropertyHelper.DefaultValidator,
  61                                                                     ConfigurationPropertyOptions.None);
  62                         validationKeyProp = new ConfigurationProperty ("validationKey", typeof (string), "AutoGenerate,IsolateApps",
  63                                                                        PropertyHelper.WhiteSpaceTrimStringConverter,
  64                                                                        PropertyHelper.NonEmptyStringValidator,
  65                                                                        ConfigurationPropertyOptions.None);
  66
  67                         properties = new ConfigurationPropertyCollection ();
  68
  69                         properties.Add (decryptionProp);
  70                         properties.Add (decryptionKeyProp);
  71                         properties.Add (validationProp);
  72                         properties.Add (validationKeyProp);
  73
  74                         AutoGenKeys ();
  75                 }
  76
  77                 protected override void Reset (ConfigurationElement parentElement)
  78                 {
  79                         base.Reset (parentElement);
  80                 }
  81
  82                 [TypeConverter (typeof (WhiteSpaceTrimStringConverter))]
  83                 [StringValidator (MinLength = 1)]
  84                 [ConfigurationProperty ("decryption", DefaultValue = "Auto")]
  85                 public string Decryption {
  86                         get { return (string) base [decryptionProp];}
  87                         set { base[decryptionProp] = value; }
  88                 }
  89
  90                 [TypeConverter (typeof (WhiteSpaceTrimStringConverter))]
  91                 [StringValidator (MinLength = 1)]
  92                 [ConfigurationProperty ("decryptionKey", DefaultValue = "AutoGenerate,IsolateApps")]
  93                 public string DecryptionKey {
  94                         get { return (string) base [decryptionKeyProp];}
  95                         set { base[decryptionKeyProp] = value;  SetDecryptionKey (value); }
  96                 }
  97
  98                 [TypeConverter (typeof (MachineKeyValidationConverter))]
  99                 [ConfigurationProperty ("validation", DefaultValue = "SHA1")]
 100                 public MachineKeyValidation Validation {
 101                         get { return (MachineKeyValidation) base [validationProp];}
 102                         set { base[validationProp] = value; }
 103                 }
 104
 105                 [TypeConverter (typeof (WhiteSpaceTrimStringConverter))]
 106                 [StringValidator (MinLength = 1)]
 107                 [ConfigurationProperty ("validationKey", DefaultValue = "AutoGenerate,IsolateApps")]
 108                 public string ValidationKey {
 109                         get { return (string) base [validationKeyProp];}
 110                         set { base[validationKeyProp] = value;  SetValidationKey (value); }
 111                 }
 112
 113                 protected override ConfigurationPropertyCollection Properties {
 114                         get { return properties; }
 115                 }
 116
 117 #region CompatabilityCode
 118                 static byte [] autogenerated;
 119                 static byte [] autogenerated_decrypt;
 120                 byte[] decryption_key;
 121                 byte[] decryption_key_192bits;
 122                 byte[] validation_key;
 123
 124                 static void AutoGenKeys ()
 125                 {
 126                         autogenerated = new byte [64];
 127                         RandomNumberGenerator rng = RandomNumberGenerator.Create ();
 128                         rng.GetBytes (autogenerated);
 129                         autogenerated_decrypt = new byte [64];
 130                         rng.GetBytes (autogenerated_decrypt);
 131                 }
 132
 133                 static byte ToHexValue (char c, bool high)
 134                 {
 135                         byte v;
 136                         if (c >= '0' && c <= '9')
 137                                 v = (byte) (c - '0');
 138                         else if (c >= 'a' && c <= 'f')
 139                                 v = (byte) (c - 'a' + 10);
 140                         else if (c >= 'A' && c <= 'F')
 141                                 v = (byte) (c - 'A' + 10);
 142                         else
 143                                 throw new ArgumentException ("Invalid hex character");
 144
 145                         if (high)
 146                                 v <<= 4;
 147
 148                         return v;
 149                 }
 150
 151                 internal static byte [] GetBytes (string key, int len)
 152                 {
 153                         byte [] result = new byte [len / 2];
 154                         for (int i = 0; i < len; i += 2)
 155                                 result [i / 2] = (byte) (ToHexValue (key [i], true) + ToHexValue (key [i + 1], false));
 156
 157                         return result;
 158                 }
 159
 160                 static byte [] MakeKey (string key, bool decryption) //, out bool isolate)
 161                 {
 162                         if (key == null || key.StartsWith ("AutoGenerate")){
 163                                 //isolate = key.IndexOf ("IsolateApps") != 1;
 164
 165                                 return (decryption) ? autogenerated_decrypt : autogenerated;
 166                         }
 167
 168                         //isolate = false;
 169
 170                         int len = key.Length;
 171                         if (len < 40 || len > 128 || (len % 2) == 1)
 172                                 throw new ArgumentException ("Invalid key length");
 173
 174                         return GetBytes (key, len);
 175                 }
 176
 177                 internal void SetDecryptionKey (string n)
 178                 {
 179                         decryption_key = MakeKey (n, true); //, out isolate_decryption);
 180                         decryption_key_192bits = new byte [24];
 181                         int count = 24;
 182                         if (decryption_key.Length < 24)
 183                                 count = decryption_key.Length;
 184                         Buffer.BlockCopy (decryption_key, 0, decryption_key_192bits, 0, count);
 185                 }
 186
 187                 internal void SetValidationKey (string n)
 188                 {
 189                         validation_key = MakeKey (n, false); //, out isolate_validation);
 190                 }
 191
 192                 internal byte [] ValidationKeyBytes {
 193                         get {
 194                                 if (validation_key == null)
 195                                         SetValidationKey (ValidationKey);
 196                                 return validation_key;
 197                         }
 198                 }
 199
 200                 internal byte [] DecryptionKeyBytes {
 201                         get {
 202                                 if (decryption_key == null)
 203                                         SetDecryptionKey (DecryptionKey);
 204                                 return decryption_key;
 205                         }
 206                 }
 207
 208                 internal byte [] DecryptionKey192Bits {
 209                         get {
 210                                 if (decryption_key_192bits == null)
 211                                         SetDecryptionKey (DecryptionKey);
 212                                 return decryption_key_192bits;
 213                         }
 214                 }
 215 #endregion
 216
 217         }
 218 }
 219
 220 #endif