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 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
  33 namespace System.Security.Policy {
  34
  35         [Serializable]
  36         public sealed class SiteMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  37
  38                 private readonly int version = 1;
  39
  40                 private string _site;
  41
  42                 // constructors
  43
  44                 // so System.Activator.CreateInstance can create an instance...
  45                 internal SiteMembershipCondition ()
  46                 {
  47                 }
  48
  49                 public SiteMembershipCondition (string site)
  50                 {
  51                         Site = site;
  52                 }
  53
  54                 // properties
  55
  56                 public string Site {
  57                         get { return _site; }
  58                         set {
  59                                 if (value == null)
  60                                         throw new ArgumentNullException ("site");
  61                                 if (!System.Security.Policy.Site.IsValid (value))
  62                                         throw new ArgumentException ("invalid site");
  63                                 _site = value;
  64                         }
  65                 }
  66
  67                 // methods
  68
  69                 public bool Check (Evidence evidence)
  70                 {
  71                         if (evidence == null)
  72                                 return false;
  73
  74                         IEnumerator e = evidence.GetHostEnumerator ();
  75                         while (e.MoveNext ()) {
  76                                 if (e.Current is Site) {
  77                                         string[] s1 = _site.Split ('.');
  78                                         string[] s2 = (e.Current as Site).origin_site.Split ('.');
  79                                         for (int i = s1.Length - 1, j = s2.Length - 1; i>=0; i--, j--) {
  80                                                 if (i == 0) {
  81                                                         // special * case
  82                                                         return (String.Compare (s1 [0], "*", true, CultureInfo.InvariantCulture) == 0);
  83                                                 }
  84                                                 if (String.Compare (s1 [i], s2 [j], true, CultureInfo.InvariantCulture) != 0)
  85                                                         return false;
  86                                         }
  87                                         return true;
  88                                 }
  89                         }
  90                         return false;
  91                 }
  92
  93                 public IMembershipCondition Copy ()
  94                 {
  95                         return new SiteMembershipCondition (_site);
  96                 }
  97
  98                 public override bool Equals (object o)
  99                 {
 100                         if (o == null)
 101                                 return false;
 102                         if (o is SiteMembershipCondition) {
 103                                 Site s = new Site ((o as SiteMembershipCondition)._site);
 104                                 return s.Equals (new Site (_site));
 105                         }
 106                         return false;
 107                 }
 108
 109                 public void FromXml (SecurityElement e)
 110                 {
 111                         FromXml (e, null);
 112                 }
 113
 114                 public void FromXml (SecurityElement e, PolicyLevel level)
 115                 {
 116                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 117                         _site = e.Attribute ("Site");
 118                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 119                 }
 120
 121                 public override int GetHashCode ()
 122                 {
 123                         return _site.GetHashCode ();
 124                 }
 125
 126                 public override string ToString ()
 127                 {
 128                         return "Site - " + _site;
 129                 }
 130
 131                 public SecurityElement ToXml ()
 132                 {
 133                         return ToXml (null);
 134                 }
 135
 136                 public SecurityElement ToXml (PolicyLevel level)
 137                 {
 138                         // PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
 139                         SecurityElement se = MembershipConditionHelper.Element (typeof (SiteMembershipCondition), version);
 140                         se.AddAttribute ("Site", _site);
 141                         return se;
 142                 }
 143         }
 144 }