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

   1 //
   2 // System.Security.Policy.UrlMembershipCondition.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003, Ximian Inc.
   9 // (C) 2004 Motus Technologies Inc. (http://www.motus.com)
  10 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Collections;
  33 using System.Globalization;
  34
  35 namespace System.Security.Policy {
  36
  37         [Serializable]
  38         public sealed class UrlMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  39
  40                 private readonly int version = 1;
  41
  42                 private Url url;
  43
  44                 public UrlMembershipCondition (string url)
  45                 {
  46                         this.url = new Url (url);
  47                 }
  48
  49                 internal UrlMembershipCondition (Url url)
  50                 {
  51                         // as the Url object has already been validated there's no
  52                         // need to restart the whole process by converting to string
  53                         this.url = (Url) url.Copy ();
  54                 }
  55
  56                 // properties
  57
  58                 public string Url {
  59                         get { return url.Value; }
  60                         set { url = new Url (value); }
  61                 }
  62
  63                 // methods
  64
  65                 public bool Check (Evidence evidence)
  66                 {
  67                         if (evidence == null)
  68                                 return false;
  69
  70                         string u = url.Value;
  71                         int wildcard = u.LastIndexOf ("*");     // partial match with a wildcard at the end
  72                         if (wildcard == -1)
  73                                 wildcard = u.Length;            // exact match
  74
  75                         IEnumerator e = evidence.GetHostEnumerator ();
  76                         while (e.MoveNext ()) {
  77                                 if (e.Current is Url) {
  78                                         // note: there shouldn't be more than one Url evidence
  79                                         if (String.Compare (u, 0, (e.Current as Url).Value, 0, wildcard,
  80                                                 true, CultureInfo.InvariantCulture) == 0) {
  81                                                 return true;
  82                                         }
  83                                         // but we must check for all of them!
  84                                 }
  85                         }
  86                         return false;
  87                 }
  88
  89                 public IMembershipCondition Copy ()
  90                 {
  91                         return new UrlMembershipCondition (url);
  92                 }
  93
  94                 public override bool Equals (object o)
  95                 {
  96                         if (o is UrlMembershipCondition) {
  97                                 string u = url.Value;
  98                                 int wildcard = u.LastIndexOf ("*");     // partial match with a wildcard at the end
  99                                 if (wildcard == -1)
 100                                         wildcard = u.Length;            // exact match
 101
 102                                 return (String.Compare (u, 0, (o as UrlMembershipCondition).Url,
 103                                         0, wildcard, true, CultureInfo.InvariantCulture) == 0);
 104                         }
 105                         return false;
 106                 }
 107
 108                 public void FromXml (SecurityElement element)
 109                 {
 110                         FromXml (element, null);
 111                 }
 112
 113                 public void FromXml (SecurityElement element, PolicyLevel level)
 114                 {
 115                         MembershipConditionHelper.CheckSecurityElement (element, "element", version, version);
 116
 117                         string u = element.Attribute ("Url");
 118                         url = (u == null) ? null : new Url (u);
 119                 }
 120
 121                 public override int GetHashCode ()
 122                 {
 123                         return url.GetHashCode ();
 124                 }
 125
 126                 public override string ToString ()
 127                 {
 128                         return "Url - " + url.Value;
 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 (UrlMembershipCondition), version);
 140                         se.AddAttribute ("Url", url.Value);
 141                         return se;
 142                 }
 143         }
 144 }