class/corlib/System.Security.Policy/ApplicationDirectoryMembershipCondition.cs

   1 //
   2 // System.Security.Policy.ApplicationDirectoryMembershipCondition
   3 //
   4 // Authors:
   5 //      Nick Drochak (ndrochak@gol.com)
   6 //      Jackson Harper (Jackson@LatitudeGeo.com)
   7 //      Sebastien Pouliot  <sebastien@ximian.com>
   8 //
   9 // (C) 2002 Nick Drochak, All rights reserved.
  10 // Copyright (C) 2004-2005 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 using System.IO;
  35 using System.Reflection;
  36 using System.Runtime.InteropServices;
  37
  38 using Mono.Security;
  39
  40 namespace System.Security.Policy {
  41
  42         [Serializable]
  43         [ComVisible (true)]
  44         public sealed class ApplicationDirectoryMembershipCondition : IConstantMembershipCondition, IMembershipCondition {
  45
  46                 private readonly int version = 1;
  47
  48                 public ApplicationDirectoryMembershipCondition ()
  49                 {
  50                 }
  51
  52                 // Methods
  53                 public bool Check (Evidence evidence)
  54                 {
  55                         if (evidence == null)
  56                                 return false;
  57
  58                         string codebase = Assembly.GetCallingAssembly ().CodeBase;
  59                         Uri local = new Uri (codebase);
  60                         Url ucode = new Url (codebase);
  61
  62                         // *both* ApplicationDirectory and Url must be in *Host* evidences
  63                         bool adir = false;
  64                         bool url = false;
  65                         IEnumerator e = evidence.GetHostEnumerator ();
  66                         while (e.MoveNext ()) {
  67                                 object o = e.Current;
  68
  69                                 if (!adir && (o is ApplicationDirectory)) {
  70                                         ApplicationDirectory ad = (o as ApplicationDirectory);
  71                                         string s = ad.Directory;
  72                                         adir = (String.Compare (s, 0, local.ToString (), 0, s.Length, true, CultureInfo.InvariantCulture) == 0);
  73                                 }
  74                                 else if (!url && (o is Url)) {
  75                                         url = ucode.Equals (o);
  76                                 }
  77
  78                                 // got both ?
  79                                 if (adir && url)
  80                                         return true;
  81                         }
  82                         return false;
  83                 }
  84
  85                 public IMembershipCondition Copy ()
  86                 {
  87                         return new ApplicationDirectoryMembershipCondition ();
  88                 }
  89
  90                 public override bool Equals (object o)
  91                 {
  92                         return (o is ApplicationDirectoryMembershipCondition);
  93                 }
  94
  95                 public void FromXml (SecurityElement e)
  96                 {
  97                         FromXml (e, null);
  98                 }
  99
 100                 public void FromXml (SecurityElement e, PolicyLevel level)
 101                 {
 102                         MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
 103                 }
 104
 105                 // All instances of ApplicationDirectoryMembershipCondition are equal so they should
 106                 // have the same hashcode
 107                 public override int GetHashCode ()
 108                 {
 109                         return typeof (ApplicationDirectoryMembershipCondition).GetHashCode ();
 110                 }
 111
 112                 public override string ToString ()
 113                 {
 114                         return "ApplicationDirectory";
 115                 }
 116
 117                 public SecurityElement ToXml ()
 118                 {
 119                         return ToXml (null);
 120                 }
 121
 122                 public SecurityElement ToXml (PolicyLevel level)
 123                 {
 124                         SecurityElement se = MembershipConditionHelper.Element (typeof (ApplicationDirectoryMembershipCondition), version);
 125                         // nothing to add
 126                         return se;
 127                 }
 128         }
 129 }