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 !NET_2_1
  32
  33 using System.Collections;
  34 using System.Globalization;
  35 using System.Runtime.InteropServices;
  36
  37 namespace System.Security.Policy {
  38
  39         [Serializable]
  40 #if NET_2_0
  41         [ComVisible (true)]
  42 #endif
  43         public sealed class ZoneMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  44
  45                 private readonly int version = 1;
  46
  47                 private SecurityZone zone;
  48
  49                 // so System.Activator.CreateInstance can create an instance...
  50                 internal ZoneMembershipCondition ()
  51                 {
  52                 }
  53
  54                 public ZoneMembershipCondition (SecurityZone zone)
  55                 {
  56                         // we need the validations
  57                         SecurityZone = zone;
  58                 }
  59
  60                 public SecurityZone SecurityZone {
  61                         get { return zone; }
  62                         set {
  63                                 if (!Enum.IsDefined (typeof (SecurityZone), value)) {
  64                                         throw new ArgumentException (Locale.GetText (
  65                                                 "invalid zone"));
  66                                 }
  67                                 if (value == SecurityZone.NoZone) {
  68                                         throw new ArgumentException (Locale.GetText (
  69                                                 "NoZone isn't valid for membership condition"));
  70                                 }
  71
  72                                 zone = value;
  73                         }
  74                 }
  75
  76                 public bool Check (Evidence evidence)
  77                 {
  78                         if (evidence == null)
  79                                 return false;
  80
  81                         IEnumerator e = evidence.GetHostEnumerator ();
  82                         while (e.MoveNext ()) {
  83                                 Zone z = (e.Current as Zone);
  84                                 if (z != null) {
  85                                         if (z.SecurityZone == zone)
  86                                                 return true;
  87                                 }
  88                         }
  89                         return false;
  90                 }
  91
  92                 public IMembershipCondition Copy ()
  93                 {
  94                         return new ZoneMembershipCondition (zone);
  95                 }
  96
  97                 public override bool Equals (object o)
  98                 {
  99                         ZoneMembershipCondition zmc = (o as ZoneMembershipCondition);
 100                         if (zmc == null)
 101                                 return false;
 102                         return (zmc.SecurityZone == zone);
 103                 }
 104
 105                 public void FromXml (SecurityElement e)
 106                 {
 107                         FromXml (e, null);
 108                 }
 109
 110                 public void FromXml (SecurityElement e, PolicyLevel level)
 111                 {
 112                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 113
 114                         string z = e.Attribute ("Zone");
 115                         if (z != null) {
 116                                 zone = (SecurityZone) Enum.Parse (typeof (SecurityZone), z);
 117                         }
 118                 }
 119
 120                 public override int GetHashCode ()
 121                 {
 122                         return zone.GetHashCode ();
 123                 }
 124
 125                 public override string ToString ()
 126                 {
 127                         return "Zone - " + zone;
 128                 }
 129
 130                 public SecurityElement ToXml ()
 131                 {
 132                         return ToXml (null);
 133                 }
 134
 135                 public SecurityElement ToXml (PolicyLevel level)
 136                 {
 137                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 138                         SecurityElement se = MembershipConditionHelper.Element (typeof (ZoneMembershipCondition), version);
 139                         se.AddAttribute ("Zone", zone.ToString ());
 140                         return se;
 141                 }
 142         }
 143 }
 144
 145 #endif
 146