mcs/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 :
  45 #if NET_4_0
  46                 EvidenceBase,
  47 #endif
  48                 IIdentityPermissionFactory, IBuiltInEvidence    {
  49
  50                 private SecurityZone zone;
  51
  52                 public Zone (SecurityZone zone)
  53                 {
  54                         if (!Enum.IsDefined (typeof (SecurityZone), zone)) {
  55                                 string msg = String.Format (Locale.GetText ("Invalid zone {0}."), zone);
  56                                 throw new ArgumentException (msg, "zone");
  57                         }
  58
  59                         this.zone = zone;
  60                 }
  61
  62                 // properties
  63
  64                 public SecurityZone SecurityZone {
  65                         get { return zone; }
  66                 }
  67
  68                 // methods
  69
  70                 public object Copy ()
  71                 {
  72                         return new Zone (zone);
  73                 }
  74
  75                 public IPermission CreateIdentityPermission (Evidence evidence)
  76                 {
  77                         return new ZoneIdentityPermission (zone);
  78                 }
  79
  80                 [MonoTODO ("Not user configurable yet")]
  81                 public static Zone CreateFromUrl (string url)
  82                 {
  83                         if (url == null)
  84                                 throw new ArgumentNullException ("url");
  85
  86                         SecurityZone z = SecurityZone.NoZone;
  87                         if (url.Length == 0)
  88                                 return new Zone (z);
  89
  90                         Uri uri = new Uri (url);
  91                         // TODO: apply zone configuration
  92                         // this is the only way to use the Trusted and Untrusted zones
  93
  94                         if (z == SecurityZone.NoZone) {
  95                                 // not part of configuration, the use default mapping
  96                                 if (uri.IsFile) {
  97                                         if (File.Exists (uri.LocalPath))
  98                                                 z = SecurityZone.MyComputer;
  99                                         else if (String.Compare ("FILE://", 0, url, 0, 7, true, CultureInfo.InvariantCulture) == 0)
 100                                                 z = SecurityZone.Intranet;      // non accessible file://
 101                                         else
 102                                                 z = SecurityZone.Internet;
 103                                 }
 104                                 else if (uri.IsLoopback) {                      // e.g. http://localhost/x
 105                                         z = SecurityZone.Intranet;
 106                                 }
 107                                 else {
 108                                         // all protocols, including unknown ones
 109                                         z = SecurityZone.Internet;
 110                                 }
 111                         }
 112
 113                         return new Zone (z);
 114                 }
 115
 116                 public override bool Equals (object o)
 117                 {
 118                         Zone z = (o as Zone);
 119                         if (z == null)
 120                                 return false;
 121
 122                         return (z.zone == zone);
 123                 }
 124
 125                 public override int GetHashCode ()
 126                 {
 127                         return (int) zone;
 128                 }
 129
 130                 public override string ToString ()
 131                 {
 132                         SecurityElement se = new SecurityElement ("System.Security.Policy.Zone");
 133                         se.AddAttribute ("version", "1");
 134                         se.AddChild (new SecurityElement ("Zone", zone.ToString ()));
 135                         return se.ToString ();
 136                 }
 137
 138                 // interface IBuiltInEvidence
 139
 140                 int IBuiltInEvidence.GetRequiredSize (bool verbose)
 141                 {
 142                         return 3;
 143                 }
 144
 145                 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
 146                 {
 147                         int new_zone = (int) buffer [position++];
 148                         new_zone += buffer [position++];
 149                         return position;
 150                 }
 151
 152                 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
 153                 {
 154                         buffer [position++] = '\x0003';
 155                         buffer [position++] = (char) (((int) zone) >> 16);
 156                         buffer [position++] = (char) (((int) zone) & 0x0FFFF);
 157                         return position;
 158                 }
 159         }
 160 }
 161
 162 #endif
 163