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

   1 //
   2 // SiteMembershipCondition.cs: Site MembershipCondition
   3 //
   4 // Author:
   5 //      Sebastien Pouliot (spouliot@motus.com)
   6 //
   7 // (C) 2004 Motus Technologies Inc. (http://www.motus.com)
   8 //
   9
  10 using System;
  11 using System.Collections;
  12 using System.Globalization;
  13 using System.Security;
  14
  15 namespace System.Security.Policy {
  16
  17         [Serializable]
  18         public sealed class SiteMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
  19
  20                 private string _site;
  21
  22                 // constructors
  23
  24                 public SiteMembershipCondition (string site)
  25                 {
  26                         Site = site;
  27                 }
  28
  29                 // properties
  30
  31                 public string Site {
  32                         get { return _site; }
  33                         set {
  34                                 if (value == null)
  35                                         throw new ArgumentNullException ("site");
  36                                 if (!System.Security.Policy.Site.IsValid (value))
  37                                         throw new ArgumentException ("invalid site");
  38                                 _site = value;
  39                         }
  40                 }
  41
  42                 // methods
  43
  44                 public bool Check (Evidence evidence)
  45                 {
  46                         if (evidence == null)
  47                                 return false;
  48
  49                         IEnumerator e = evidence.GetHostEnumerator ();
  50                         while (e.MoveNext ()) {
  51                                 if (e.Current is Site) {
  52                                         string[] s1 = _site.Split ('.');
  53                                         string[] s2 = (e.Current as Site).origin_site.Split ('.');
  54                                         for (int i = s1.Length - 1, j = s2.Length - 1; i>=0; i--, j--) {
  55                                                 if (i == 0) {
  56                                                         // special * case
  57                                                         return (String.Compare (s1 [0], "*", true, CultureInfo.InvariantCulture) == 0);
  58                                                 }
  59                                                 if (String.Compare (s1 [i], s2 [j], true, CultureInfo.InvariantCulture) != 0)
  60                                                         return false;
  61                                         }
  62                                         return true;
  63                                 }
  64                         }
  65                         return false;
  66                 }
  67
  68                 public IMembershipCondition Copy ()
  69                 {
  70                         return new SiteMembershipCondition (_site);
  71                 }
  72
  73                 public override bool Equals (object o)
  74                 {
  75                         if (o == null)
  76                                 return false;
  77                         if (o is SiteMembershipCondition) {
  78                                 Site s = new Site ((o as SiteMembershipCondition)._site);
  79                                 return s.Equals (new Site (_site));
  80                         }
  81                         return false;
  82                 }
  83
  84                 public void FromXml (SecurityElement e)
  85                 {
  86                         FromXml (e, null);
  87                 }
  88
  89                 public void FromXml (SecurityElement e, PolicyLevel level)
  90                 {
  91                         if (e == null)
  92                                 throw new ArgumentNullException ("e");
  93                         if (e.Tag != "IMembershipCondition")
  94                                 throw new ArgumentException (Locale.GetText ("Invalid XML - not a IMembershipCondition tag."));
  95                         if (e.Attribute ("class") != GetType ().AssemblyQualifiedName)
  96                                 throw new ArgumentException (Locale.GetText ("Invalid class."));
  97                         if (e.Attribute ("version") != "1")
  98                                 throw new ArgumentException (Locale.GetText ("Invalid version."));
  99
 100                         _site = e.Attribute ("Site");
 101                 }
 102
 103                 public override int GetHashCode ()
 104                 {
 105                         return _site.GetHashCode ();
 106                 }
 107
 108                 public override string ToString ()
 109                 {
 110                         return "Site - " + _site;
 111                 }
 112
 113                 public SecurityElement ToXml ()
 114                 {
 115                         return ToXml (null);
 116                 }
 117
 118                 public SecurityElement ToXml (PolicyLevel level)
 119                 {
 120                         SecurityElement element = new SecurityElement ("IMembershipCondition");
 121                         element.AddAttribute ("class", this.GetType ().AssemblyQualifiedName);
 122                         element.AddAttribute ("version", "1");
 123                         element.AddAttribute ("Site", _site);
 124                         return element;
 125                 }
 126         }
 127 }