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

   1 //
   2 // System.Security.Policy.Site.cs
   3 //
   4 // Authors
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   9 // Portions (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.Security.Permissions;
  34 using System.Runtime.InteropServices;
  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 Site: IIdentityPermissionFactory, IBuiltInEvidence {
  45
  46                 internal string origin_site;
  47
  48                 public Site (string name)
  49                 {
  50                         if (name == null)
  51                                 throw new ArgumentNullException ("url");
  52                         if (!IsValid (name))
  53                                 throw new ArgumentException (Locale.GetText ("name is not valid"));
  54
  55                         origin_site = name;
  56                 }
  57
  58                 public static Site CreateFromUrl (string url)
  59                 {
  60                         if (url == null)
  61                                 throw new ArgumentNullException ("url");
  62                         if (url.Length == 0)
  63                                 throw new FormatException (Locale.GetText ("Empty URL."));
  64
  65                         string site = UrlToSite (url);
  66                         if (site == null) {
  67                                 string msg = String.Format (Locale.GetText ("Invalid URL '{0}'."), url);
  68                                 throw new ArgumentException (msg, "url");
  69                         }
  70
  71                         return new Site (site);
  72                 }
  73
  74                 public object Copy ()
  75                 {
  76                         return new Site (origin_site);
  77                 }
  78
  79                 public IPermission CreateIdentityPermission (Evidence evidence)
  80                 {
  81                         return new SiteIdentityPermission (origin_site);
  82                 }
  83
  84                 public override bool Equals (object o)
  85                 {
  86                         Site s = (o as System.Security.Policy.Site);
  87                         if (s == null)
  88                                 return false;
  89                         return (String.Compare (s.Name, origin_site, true, CultureInfo.InvariantCulture) == 0);
  90                 }
  91
  92                 public override int GetHashCode ()
  93                 {
  94                         return origin_site.GetHashCode ();
  95                 }
  96
  97                 public override string ToString ()
  98                 {
  99                         SecurityElement element = new SecurityElement ("System.Security.Policy.Site");
 100                         element.AddAttribute ("version", "1");
 101                         element.AddChild (new SecurityElement ("Name", origin_site));
 102                         return element.ToString ();
 103                 }
 104
 105                 // properties
 106
 107                 public string Name {
 108                         get { return origin_site; }
 109                 }
 110
 111                 // interface IBuiltInEvidence
 112
 113                 int IBuiltInEvidence.GetRequiredSize (bool verbose)
 114                 {
 115                         return (verbose ? 3 : 1) + origin_site.Length;
 116                 }
 117
 118                 [MonoTODO ("IBuiltInEvidence")]
 119                 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
 120                 {
 121                         return 0;
 122                 }
 123
 124                 [MonoTODO ("IBuiltInEvidence")]
 125                 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
 126                 {
 127                         return 0;
 128                 }
 129
 130                 // internals
 131
 132                 internal static bool IsValid (string name)
 133                 {
 134                         if (name == String.Empty)
 135                                 return false;
 136                         if ((name.Length == 1) && (name == "."))                // split would remove .
 137                                 return false;
 138
 139                         string [] parts = name.Split ('.');
 140                         for (int i=0; i < parts.Length; i++) {
 141                                 string part = parts [i];
 142                                 if ((i == 0) && (part == "*"))                  // * (only in first part)
 143                                         continue;
 144                                 foreach (char c in part) {
 145                                         int x = Convert.ToInt32 (c);
 146 #if NET_2_0
 147                                         bool result = ((x == 33) || (x == 45)   // !-
 148                                                 || (x >= 35 && x <= 41)         // #$%&'()
 149                                                 || (x >= 48 && x <= 57)         // 0-9
 150                                                 || (x >= 64 && x <= 90)         // @,A-Z
 151                                                 || (x >= 94 && x <= 95)         // ^_
 152                                                 || (x >= 97 && x <= 123)        // a-z{
 153                                                 || (x >= 125 && x <= 126));     // }~
 154 #else
 155                                         bool result = ((x == 45)                // -
 156                                                 || (x >= 47 && x <= 57)         // /,0-9
 157                                                 || (x >= 64 && x <= 90)         // @,A-Z
 158                                                 || (x == 95)                    // _
 159                                                 || (x >= 97 && x <= 122));      // a-z
 160 #endif
 161                                         if (!result)
 162                                                 return false;
 163                                 }
 164                         }
 165                         return true;
 166                 }
 167
 168                 // no exception - we return null if a site couldn't be created
 169                 // this is useful for creating the default evidence as the majority of URL will be local (file://)
 170                 // and throw an unrequired exception
 171                 internal static string UrlToSite (string url)
 172                 {
 173                         if (url == null)
 174                                 return null;
 175
 176                         Uri uri = new Uri (url);
 177 #if NET_2_0
 178                         if (uri.Scheme == Uri.UriSchemeFile)
 179                                 return null;
 180                         string site = uri.Host;
 181 #else
 182                         string site = uri.Host;
 183                         if (site == null)
 184                                 site = uri.AbsoluteUri.ToUpper ();              // strange but true
 185 #endif
 186                         return IsValid (site) ? site : null;
 187                 }
 188         }
 189 }