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

   1 //
   2 // SiteMembershipCondition.cs: Site MembershipCondition
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2004 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Collections;
  31 using System.Globalization;
  32 using System.Runtime.InteropServices;
  33
  34 namespace System.Security.Policy {
  35
  36         [Serializable]
  37 #if NET_2_0
  38         [ComVisible (true)]
  39 #endif
  40         public sealed class SiteMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  41
  42                 private readonly int version = 1;
  43
  44                 private string _site;
  45
  46                 // constructors
  47
  48                 // so System.Activator.CreateInstance can create an instance...
  49                 internal SiteMembershipCondition ()
  50                 {
  51                 }
  52
  53                 public SiteMembershipCondition (string site)
  54                 {
  55                         Site = site;
  56                 }
  57
  58                 // properties
  59
  60                 public string Site {
  61                         get { return _site; }
  62                         set {
  63                                 if (value == null)
  64                                         throw new ArgumentNullException ("site");
  65                                 if (!System.Security.Policy.Site.IsValid (value))
  66                                         throw new ArgumentException ("invalid site");
  67                                 _site = value;
  68                         }
  69                 }
  70
  71                 // methods
  72
  73                 public bool Check (Evidence evidence)
  74                 {
  75                         if (evidence == null)
  76                                 return false;
  77
  78                         IEnumerator e = evidence.GetHostEnumerator ();
  79                         while (e.MoveNext ()) {
  80                                 if (e.Current is Site) {
  81                                         string[] s1 = _site.Split ('.');
  82                                         string[] s2 = (e.Current as Site).origin_site.Split ('.');
  83                                         for (int i = s1.Length - 1, j = s2.Length - 1; i>=0; i--, j--) {
  84                                                 if (i == 0) {
  85                                                         // special * case
  86                                                         return (String.Compare (s1 [0], "*", true, CultureInfo.InvariantCulture) == 0);
  87                                                 }
  88                                                 if (String.Compare (s1 [i], s2 [j], true, CultureInfo.InvariantCulture) != 0)
  89                                                         return false;
  90                                         }
  91                                         return true;
  92                                 }
  93                         }
  94                         return false;
  95                 }
  96
  97                 public IMembershipCondition Copy ()
  98                 {
  99                         return new SiteMembershipCondition (_site);
 100                 }
 101
 102                 public override bool Equals (object o)
 103                 {
 104                         if (o == null)
 105                                 return false;
 106                         if (o is SiteMembershipCondition) {
 107                                 Site s = new Site ((o as SiteMembershipCondition)._site);
 108                                 return s.Equals (new Site (_site));
 109                         }
 110                         return false;
 111                 }
 112
 113                 public void FromXml (SecurityElement e)
 114                 {
 115                         FromXml (e, null);
 116                 }
 117
 118                 public void FromXml (SecurityElement e, PolicyLevel level)
 119                 {
 120                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 121                         _site = e.Attribute ("Site");
 122                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 123                 }
 124
 125                 public override int GetHashCode ()
 126                 {
 127                         return _site.GetHashCode ();
 128                 }
 129
 130                 public override string ToString ()
 131                 {
 132                         return "Site - " + _site;
 133                 }
 134
 135                 public SecurityElement ToXml ()
 136                 {
 137                         return ToXml (null);
 138                 }
 139
 140                 public SecurityElement ToXml (PolicyLevel level)
 141                 {
 142                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 143                         SecurityElement se = MembershipConditionHelper.Element (typeof (SiteMembershipCondition), version);
 144                         se.AddAttribute ("Site", _site);
 145                         return se;
 146                 }
 147         }
 148 }