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         [ComVisible (true)]
  42         public sealed class Site: IIdentityPermissionFactory, IBuiltInEvidence {
  43
  44                 internal string origin_site;
  45
  46                 public Site (string name)
  47                 {
  48                         if (name == null)
  49                                 throw new ArgumentNullException ("url");
  50                         if (!IsValid (name))
  51                                 throw new ArgumentException (Locale.GetText ("name is not valid"));
  52
  53                         origin_site = name;
  54                 }
  55
  56                 public static Site CreateFromUrl (string url)
  57                 {
  58                         if (url == null)
  59                                 throw new ArgumentNullException ("url");
  60                         if (url.Length == 0)
  61                                 throw new FormatException (Locale.GetText ("Empty URL."));
  62
  63                         string site = UrlToSite (url);
  64                         if (site == null) {
  65                                 string msg = String.Format (Locale.GetText ("Invalid URL '{0}'."), url);
  66                                 throw new ArgumentException (msg, "url");
  67                         }
  68
  69                         return new Site (site);
  70                 }
  71
  72                 public object Copy ()
  73                 {
  74                         return new Site (origin_site);
  75                 }
  76
  77                 public IPermission CreateIdentityPermission (Evidence evidence)
  78                 {
  79                         return new SiteIdentityPermission (origin_site);
  80                 }
  81
  82                 public override bool Equals (object o)
  83                 {
  84                         Site s = (o as System.Security.Policy.Site);
  85                         if (s == null)
  86                                 return false;
  87                         return (String.Compare (s.Name, origin_site, true, CultureInfo.InvariantCulture) == 0);
  88                 }
  89
  90                 public override int GetHashCode ()
  91                 {
  92                         return origin_site.GetHashCode ();
  93                 }
  94
  95                 public override string ToString ()
  96                 {
  97                         SecurityElement element = new SecurityElement ("System.Security.Policy.Site");
  98                         element.AddAttribute ("version", "1");
  99                         element.AddChild (new SecurityElement ("Name", origin_site));
 100                         return element.ToString ();
 101                 }
 102
 103                 // properties
 104
 105                 public string Name {
 106                         get { return origin_site; }
 107                 }
 108
 109                 // interface IBuiltInEvidence
 110
 111                 int IBuiltInEvidence.GetRequiredSize (bool verbose)
 112                 {
 113                         return (verbose ? 3 : 1) + origin_site.Length;
 114                 }
 115
 116                 [MonoTODO ("IBuiltInEvidence")]
 117                 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
 118                 {
 119                         return 0;
 120                 }
 121
 122                 [MonoTODO ("IBuiltInEvidence")]
 123                 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
 124                 {
 125                         return 0;
 126                 }
 127
 128                 // internals
 129
 130                 internal static bool IsValid (string name)
 131                 {
 132                         if (name == String.Empty)
 133                                 return false;
 134                         if ((name.Length == 1) && (name == "."))                // split would remove .
 135                                 return false;
 136
 137                         string [] parts = name.Split ('.');
 138                         for (int i=0; i < parts.Length; i++) {
 139                                 string part = parts [i];
 140                                 if ((i == 0) && (part == "*"))                  // * (only in first part)
 141                                         continue;
 142                                 foreach (char c in part) {
 143                                         int x = Convert.ToInt32 (c);
 144                                         bool result = ((x == 33) || (x == 45)   // !-
 145                                                 || (x >= 35 && x <= 41)         // #$%&'()
 146                                                 || (x >= 48 && x <= 57)         // 0-9
 147                                                 || (x >= 64 && x <= 90)         // @,A-Z
 148                                                 || (x >= 94 && x <= 95)         // ^_
 149                                                 || (x >= 97 && x <= 123)        // a-z{
 150                                                 || (x >= 125 && x <= 126));     // }~
 151                                         if (!result)
 152                                                 return false;
 153                                 }
 154                         }
 155                         return true;
 156                 }
 157
 158                 // no exception - we return null if a site couldn't be created
 159                 // this is useful for creating the default evidence as the majority of URL will be local (file://)
 160                 // and throw an unrequired exception
 161                 internal static string UrlToSite (string url)
 162                 {
 163                         if (url == null)
 164                                 return null;
 165
 166                         Uri uri = new Uri (url);
 167                         if (uri.Scheme == Uri.UriSchemeFile)
 168                                 return null;
 169                         string site = uri.Host;
 170                         return IsValid (site) ? site : null;
 171                 }
 172         }
 173 }