mcs/class/corlib/System.Security.Policy/ZoneMembershipCondition.cs

   1 //
   2 // System.Security.Policy.ZoneMembershipCondition.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003, Ximian Inc.
   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.Collections;
  34 using System.Globalization;
  35 using System.Runtime.InteropServices;
  36
  37 namespace System.Security.Policy {
  38
  39         [Serializable]
  40         [ComVisible (true)]
  41         public sealed class ZoneMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  42
  43                 private readonly int version = 1;
  44
  45                 private SecurityZone zone;
  46
  47                 // so System.Activator.CreateInstance can create an instance...
  48                 internal ZoneMembershipCondition ()
  49                 {
  50                 }
  51
  52                 public ZoneMembershipCondition (SecurityZone zone)
  53                 {
  54                         // we need the validations
  55                         SecurityZone = zone;
  56                 }
  57
  58                 public SecurityZone SecurityZone {
  59                         get { return zone; }
  60                         set {
  61                                 if (!Enum.IsDefined (typeof (SecurityZone), value)) {
  62                                         throw new ArgumentException (Locale.GetText (
  63                                                 "invalid zone"));
  64                                 }
  65                                 if (value == SecurityZone.NoZone) {
  66                                         throw new ArgumentException (Locale.GetText (
  67                                                 "NoZone isn't valid for membership condition"));
  68                                 }
  69
  70                                 zone = value;
  71                         }
  72                 }
  73
  74                 public bool Check (Evidence evidence)
  75                 {
  76                         if (evidence == null)
  77                                 return false;
  78
  79                         IEnumerator e = evidence.GetHostEnumerator ();
  80                         while (e.MoveNext ()) {
  81                                 Zone z = (e.Current as Zone);
  82                                 if (z != null) {
  83                                         if (z.SecurityZone == zone)
  84                                                 return true;
  85                                 }
  86                         }
  87                         return false;
  88                 }
  89
  90                 public IMembershipCondition Copy ()
  91                 {
  92                         return new ZoneMembershipCondition (zone);
  93                 }
  94
  95                 public override bool Equals (object o)
  96                 {
  97                         ZoneMembershipCondition zmc = (o as ZoneMembershipCondition);
  98                         if (zmc == null)
  99                                 return false;
 100                         return (zmc.SecurityZone == zone);
 101                 }
 102
 103                 public void FromXml (SecurityElement e)
 104                 {
 105                         FromXml (e, null);
 106                 }
 107
 108                 public void FromXml (SecurityElement e, PolicyLevel level)
 109                 {
 110                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 111
 112                         string z = e.Attribute ("Zone");
 113                         if (z != null) {
 114                                 zone = (SecurityZone) Enum.Parse (typeof (SecurityZone), z);
 115                         }
 116                 }
 117
 118                 public override int GetHashCode ()
 119                 {
 120                         return zone.GetHashCode ();
 121                 }
 122
 123                 public override string ToString ()
 124                 {
 125                         return "Zone - " + zone;
 126                 }
 127
 128                 public SecurityElement ToXml ()
 129                 {
 130                         return ToXml (null);
 131                 }
 132
 133                 public SecurityElement ToXml (PolicyLevel level)
 134                 {
 135                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 136                         SecurityElement se = MembershipConditionHelper.Element (typeof (ZoneMembershipCondition), version);
 137                         se.AddAttribute ("Zone", zone.ToString ());
 138                         return se;
 139                 }
 140         }
 141 }
 142
 143 #endif
 144