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