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 #if NET_2_0
  42         [ComVisible (true)]
  43 #endif
  44         public sealed class Url: IIdentityPermissionFactory, IBuiltInEvidence {
  45
  46                 private string origin_url;
  47
  48                 public Url (string name)
  49                         : this (name, false)
  50                 {
  51                 }
  52
  53                 internal Url (string name, bool validated)
  54                 {
  55                         origin_url = validated ? name : Prepare (name);
  56                 }
  57
  58                 // methods
  59
  60                 public object Copy ()
  61                 {
  62                         // dont re-validate the Url
  63                         return new Url (origin_url, true);
  64                 }
  65
  66                 public IPermission CreateIdentityPermission (Evidence evidence)
  67                 {
  68                         return new UrlIdentityPermission (origin_url);
  69                 }
  70
  71                 public override bool Equals (object o)
  72                 {
  73                         Url u = (o as System.Security.Policy.Url);
  74                         if (u == null)
  75                                 return false;
  76
  77                         string url1 = u.Value;
  78                         string url2 = origin_url;
  79 #if NET_2_0
  80                         if (url1.IndexOf (Uri.SchemeDelimiter) < 0)
  81                                 url1 = "file://" + url1;
  82                         if (url2.IndexOf (Uri.SchemeDelimiter) < 0)
  83                                 url2 = "file://" + url2;
  84 #endif
  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 NET_2_0
  92                         if (s.IndexOf (Uri.SchemeDelimiter) < 0)
  93                                 s = "file://" + s;
  94 #endif
  95                         return s.GetHashCode ();
  96                 }
  97
  98                 public override string ToString ()
  99                 {
 100                         SecurityElement element = new SecurityElement ("System.Security.Policy.Url");
 101                         element.AddAttribute ("version", "1");
 102                         element.AddChild (new SecurityElement ("Url", origin_url));
 103                         return element.ToString ();
 104                 }
 105
 106                 public string Value {
 107                         get { return origin_url; }
 108                 }
 109
 110                 // interface IBuiltInEvidence
 111
 112                 int IBuiltInEvidence.GetRequiredSize (bool verbose)
 113                 {
 114                         return (verbose ? 3 : 1) + origin_url.Length;
 115                 }
 116
 117                 [MonoTODO ("IBuiltInEvidence")]
 118                 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
 119                 {
 120                         return 0;
 121                 }
 122
 123                 [MonoTODO ("IBuiltInEvidence")]
 124                 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
 125                 {
 126                         return 0;
 127                 }
 128
 129                 // internal
 130 #if NET_2_0
 131                 private string Prepare (string url)
 132                 {
 133                         if (url == null)
 134                                 throw new ArgumentNullException ("Url");
 135                         if (url == String.Empty)
 136                                 throw new FormatException (Locale.GetText ("Invalid (empty) Url"));
 137
 138                         int protocolPos = url.IndexOf (Uri.SchemeDelimiter);    // '://'
 139                         if (protocolPos > 0) {
 140                                 if (url.StartsWith ("file://")) {
 141                                         // convert file url into uppercase
 142                                         url = "file://" + url.Substring (7);
 143                                 }
 144                                 // don't escape and don't reduce (e.g. '.' and '..')
 145                                 Uri uri = new Uri (url, false, false);
 146                                 url = uri.ToString ();
 147                         }
 148
 149                         int lastpos = url.Length - 1;
 150                         if (url [lastpos] == '/')
 151                                 url = url.Substring (0, lastpos);
 152
 153                         return url;
 154                 }
 155 #else
 156                 private string Prepare (string url)
 157                 {
 158                         if (url == null)
 159                                 throw new ArgumentNullException ("Url");
 160                         if (url == String.Empty)
 161                                 throw new FormatException (Locale.GetText ("Invalid (empty) Url"));
 162
 163                         int protocolPos = url.IndexOf (Uri.SchemeDelimiter);    // '://'
 164                         if (protocolPos > 0) {
 165                                 if (url.StartsWith ("file://")) {
 166                                         // convert file url into uppercase
 167                                         url = "file://" + url.Substring (7).ToUpperInvariant ();
 168                                 } else {
 169                                         // add a trailing slash if none (lonely one) is present
 170                                         if (url.LastIndexOf ("/") == protocolPos + 2)
 171                                                 url += "/";
 172                                 }
 173                         } else {
 174                                 // add file scheme (default) and convert url to uppercase
 175                                 url = "file://" + url.ToUpperInvariant ();
 176                         }
 177
 178                         // don't escape and don't reduce (e.g. '.' and '..')
 179                         Uri uri = new Uri (url, false, false);
 180                         if ((uri.Host.IndexOf ('*') < 0) || (uri.Host.Length < 2)) // lone star case
 181                                 url = uri.ToString ();
 182                         else {
 183                                 string msg = Locale.GetText ("Invalid * character in url");
 184                                 throw new ArgumentException (msg, "name");
 185                         }
 186
 187                         return url;
 188                 }
 189 #endif
 190        }
 191 }