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