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         [ComVisible (true)]
  38         public sealed class SiteMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  39
  40                 private readonly int version = 1;
  41
  42                 private string _site;
  43
  44                 // constructors
  45
  46                 // so System.Activator.CreateInstance can create an instance...
  47                 internal SiteMembershipCondition ()
  48                 {
  49                 }
  50
  51                 public SiteMembershipCondition (string site)
  52                 {
  53                         Site = site;
  54                 }
  55
  56                 // properties
  57
  58                 public string Site {
  59                         get { return _site; }
  60                         set {
  61                                 if (value == null)
  62                                         throw new ArgumentNullException ("site");
  63                                 if (!System.Security.Policy.Site.IsValid (value))
  64                                         throw new ArgumentException ("invalid site");
  65                                 _site = value;
  66                         }
  67                 }
  68
  69                 // methods
  70
  71                 public bool Check (Evidence evidence)
  72                 {
  73                         if (evidence == null)
  74                                 return false;
  75
  76                         IEnumerator e = evidence.GetHostEnumerator ();
  77                         while (e.MoveNext ()) {
  78                                 if (e.Current is Site) {
  79                                         string[] s1 = _site.Split ('.');
  80                                         string[] s2 = (e.Current as Site).origin_site.Split ('.');
  81                                         for (int i = s1.Length - 1, j = s2.Length - 1; i>=0; i--, j--) {
  82                                                 if (i == 0) {
  83                                                         // special * case
  84                                                         return (String.Compare (s1 [0], "*", true, CultureInfo.InvariantCulture) == 0);
  85                                                 }
  86                                                 if (String.Compare (s1 [i], s2 [j], true, CultureInfo.InvariantCulture) != 0)
  87                                                         return false;
  88                                         }
  89                                         return true;
  90                                 }
  91                         }
  92                         return false;
  93                 }
  94
  95                 public IMembershipCondition Copy ()
  96                 {
  97                         return new SiteMembershipCondition (_site);
  98                 }
  99
 100                 public override bool Equals (object o)
 101                 {
 102                         if (o == null)
 103                                 return false;
 104                         if (o is SiteMembershipCondition) {
 105                                 Site s = new Site ((o as SiteMembershipCondition)._site);
 106                                 return s.Equals (new Site (_site));
 107                         }
 108                         return false;
 109                 }
 110
 111                 public void FromXml (SecurityElement e)
 112                 {
 113                         FromXml (e, null);
 114                 }
 115
 116                 public void FromXml (SecurityElement e, PolicyLevel level)
 117                 {
 118                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 119                         _site = e.Attribute ("Site");
 120                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 121                 }
 122
 123                 public override int GetHashCode ()
 124                 {
 125                         return _site.GetHashCode ();
 126                 }
 127
 128                 public override string ToString ()
 129                 {
 130                         return "Site - " + _site;
 131                 }
 132
 133                 public SecurityElement ToXml ()
 134                 {
 135                         return ToXml (null);
 136                 }
 137
 138                 public SecurityElement ToXml (PolicyLevel level)
 139                 {
 140                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 141                         SecurityElement se = MembershipConditionHelper.Element (typeof (SiteMembershipCondition), version);
 142                         se.AddAttribute ("Site", _site);
 143                         return se;
 144                 }
 145         }
 146 }