class/corlib/System.Security.Policy/Zone.cs

   1 //
   2 // System.Security.Policy.Zone
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2002 Ximian, Inc (http://www.ximian.com)
   9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  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 #if !MOONLIGHT
  32
  33 using System.IO;
  34 using System.Globalization;
  35 using System.Security.Permissions;
  36 using System.Runtime.InteropServices;
  37
  38 using Mono.Security;
  39
  40 namespace System.Security.Policy {
  41
  42         [Serializable]
  43         [ComVisible (true)]
  44         public sealed class Zone : IIdentityPermissionFactory, IBuiltInEvidence {
  45
  46                 private SecurityZone zone;
  47
  48                 public Zone (SecurityZone zone)
  49                 {
  50                         if (!Enum.IsDefined (typeof (SecurityZone), zone)) {
  51                                 string msg = String.Format (Locale.GetText ("Invalid zone {0}."), zone);
  52                                 throw new ArgumentException (msg, "zone");
  53                         }
  54
  55                         this.zone = zone;
  56                 }
  57
  58                 // properties
  59
  60                 public SecurityZone SecurityZone {
  61                         get { return zone; }
  62                 }
  63
  64                 // methods
  65
  66                 public object Copy ()
  67                 {
  68                         return new Zone (zone);
  69                 }
  70
  71                 public IPermission CreateIdentityPermission (Evidence evidence)
  72                 {
  73                         return new ZoneIdentityPermission (zone);
  74                 }
  75
  76                 [MonoTODO ("Not user configurable yet")]
  77                 public static Zone CreateFromUrl (string url)
  78                 {
  79                         if (url == null)
  80                                 throw new ArgumentNullException ("url");
  81
  82                         SecurityZone z = SecurityZone.NoZone;
  83                         if (url.Length == 0)
  84                                 return new Zone (z);
  85
  86                         Uri uri = new Uri (url);
  87                         // TODO: apply zone configuration
  88                         // this is the only way to use the Trusted and Untrusted zones
  89
  90                         if (z == SecurityZone.NoZone) {
  91                                 // not part of configuration, the use default mapping
  92                                 if (uri.IsFile) {
  93                                         if (File.Exists (uri.LocalPath))
  94                                                 z = SecurityZone.MyComputer;
  95                                         else if (String.Compare ("FILE://", 0, url, 0, 7, true, CultureInfo.InvariantCulture) == 0)
  96                                                 z = SecurityZone.Intranet;      // non accessible file://
  97                                         else
  98                                                 z = SecurityZone.Internet;
  99                                 }
 100                                 else if (uri.IsLoopback) {                      // e.g. http://localhost/x
 101                                         z = SecurityZone.Intranet;
 102                                 }
 103                                 else {
 104                                         // all protocols, including unknown ones
 105                                         z = SecurityZone.Internet;
 106                                 }
 107                         }
 108
 109                         return new Zone (z);
 110                 }
 111
 112                 public override bool Equals (object o)
 113                 {
 114                         Zone z = (o as Zone);
 115                         if (z == null)
 116                                 return false;
 117
 118                         return (z.zone == zone);
 119                 }
 120
 121                 public override int GetHashCode ()
 122                 {
 123                         return (int) zone;
 124                 }
 125
 126                 public override string ToString ()
 127                 {
 128                         SecurityElement se = new SecurityElement ("System.Security.Policy.Zone");
 129                         se.AddAttribute ("version", "1");
 130                         se.AddChild (new SecurityElement ("Zone", zone.ToString ()));
 131                         return se.ToString ();
 132                 }
 133
 134                 // interface IBuiltInEvidence
 135
 136                 int IBuiltInEvidence.GetRequiredSize (bool verbose)
 137                 {
 138                         return 3;
 139                 }
 140
 141                 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
 142                 {
 143                         int new_zone = (int) buffer [position++];
 144                         new_zone += buffer [position++];
 145                         return position;
 146                 }
 147
 148                 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
 149                 {
 150                         buffer [position++] = '\x0003';
 151                         buffer [position++] = (char) (((int) zone) >> 16);
 152                         buffer [position++] = (char) (((int) zone) & 0x0FFFF);
 153                         return position;
 154                 }
 155         }
 156 }
 157
 158 #endif
 159