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

   1 //
   2 // System.Security.Policy.Url.cs
   3 //
   4 // Author
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   9 // (C) 2004 Motus Technologies Inc. (http://www.motus.com)
  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.Globalization;
  33 using System.Runtime.InteropServices;
  34 using System.Security.Permissions;
  35
  36 using Mono.Security;
  37
  38 namespace System.Security.Policy {
  39
  40         [Serializable]
  41         [ComVisible (true)]
  42         public sealed class Url :
  43 #if NET_4_0
  44                 EvidenceBase,
  45 #endif
  46                 IIdentityPermissionFactory, IBuiltInEvidence {
  47
  48                 private string origin_url;
  49
  50                 public Url (string name)
  51                         : this (name, false)
  52                 {
  53                 }
  54
  55                 internal Url (string name, bool validated)
  56                 {
  57                         origin_url = validated ? name : Prepare (name);
  58                 }
  59
  60                 // methods
  61
  62                 public object Copy ()
  63                 {
  64                         // dont re-validate the Url
  65                         return new Url (origin_url, true);
  66                 }
  67
  68                 public IPermission CreateIdentityPermission (Evidence evidence)
  69                 {
  70                         return new UrlIdentityPermission (origin_url);
  71                 }
  72
  73                 public override bool Equals (object o)
  74                 {
  75                         Url u = (o as System.Security.Policy.Url);
  76                         if (u == null)
  77                                 return false;
  78
  79                         string url1 = u.Value;
  80                         string url2 = origin_url;
  81                         if (url1.IndexOf (Uri.SchemeDelimiter) < 0)
  82                                 url1 = "file://" + url1;
  83                         if (url2.IndexOf (Uri.SchemeDelimiter) < 0)
  84                                 url2 = "file://" + url2;
  85                         return (String.Compare (url1, url2, true, CultureInfo.InvariantCulture) == 0);
  86                 }
  87
  88                 public override int GetHashCode ()
  89                 {
  90                         string s = origin_url;
  91                         if (s.IndexOf (Uri.SchemeDelimiter) < 0)
  92                                 s = "file://" + s;
  93                         return s.GetHashCode ();
  94                 }
  95
  96                 public override string ToString ()
  97                 {
  98                         SecurityElement element = new SecurityElement ("System.Security.Policy.Url");
  99                         element.AddAttribute ("version", "1");
 100                         element.AddChild (new SecurityElement ("Url", origin_url));
 101                         return element.ToString ();
 102                 }
 103
 104                 public string Value {
 105                         get { return origin_url; }
 106                 }
 107
 108                 // interface IBuiltInEvidence
 109
 110                 int IBuiltInEvidence.GetRequiredSize (bool verbose)
 111                 {
 112                         return (verbose ? 3 : 1) + origin_url.Length;
 113                 }
 114
 115                 [MonoTODO ("IBuiltInEvidence")]
 116                 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
 117                 {
 118                         return 0;
 119                 }
 120
 121                 [MonoTODO ("IBuiltInEvidence")]
 122                 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
 123                 {
 124                         return 0;
 125                 }
 126
 127                 // internal
 128                 private string Prepare (string url)
 129                 {
 130                         if (url == null)
 131                                 throw new ArgumentNullException ("Url");
 132                         if (url == String.Empty)
 133                                 throw new FormatException (Locale.GetText ("Invalid (empty) Url"));
 134
 135                         int protocolPos = url.IndexOf (Uri.SchemeDelimiter);    // '://'
 136                         if (protocolPos > 0) {
 137                                 if (url.StartsWith ("file://")) {
 138                                         // convert file url into uppercase
 139                                         url = "file://" + url.Substring (7);
 140                                 }
 141                                 // don't escape and don't reduce (e.g. '.' and '..')
 142                                 Uri uri = new Uri (url, false, false);
 143                                 url = uri.ToString ();
 144                         }
 145
 146                         int lastpos = url.Length - 1;
 147                         if (url [lastpos] == '/')
 148                                 url = url.Substring (0, lastpos);
 149
 150                         return url;
 151                 }
 152        }
 153 }