mcs/class/corlib/System.Security.Permissions/PermissionSetAttribute.cs

   1 //
   2 // System.Security.Permissions.PermissionSetAttribute.cs
   3 //
   4 // Authors
   5 //      Duncan Mak <duncan@ximian.com>
   6 //      Sebastien Pouliot  <spouliot@videotron.ca>
   7 //
   8 // (C) 2002 Ximian, Inc. http://www.ximian.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.IO;
  36 using System.Security.Policy;
  37 using System.Text;
  38
  39 using Mono.Xml;
  40
  41 namespace System.Security.Permissions {
  42
  43         [AttributeUsage (AttributeTargets.Assembly | AttributeTargets.Class |
  44                          AttributeTargets.Struct | AttributeTargets.Constructor |
  45                          AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
  46         [Serializable]
  47         public sealed class PermissionSetAttribute : CodeAccessSecurityAttribute {
  48
  49                 // Fields
  50                 private string file;
  51                 private string name;
  52                 private bool isUnicodeEncoded;
  53                 private string xml;
  54
  55                 // Constructor
  56                 public PermissionSetAttribute (SecurityAction action)
  57                         : base (action)
  58                 {
  59                 }
  60
  61                 // Properties
  62                 public string File
  63                 {
  64                         get { return file; }
  65                         set { file = value; }
  66                 }
  67
  68                 public string Name
  69                 {
  70                         get { return name; }
  71                         set { name = value; }
  72                 }
  73
  74                 public bool UnicodeEncoded
  75                 {
  76                         get { return isUnicodeEncoded; }
  77                         set { isUnicodeEncoded = value; }
  78                 }
  79
  80                 public string XML
  81                 {
  82                         get { return xml; }
  83                         set { xml = value; }
  84                 }
  85
  86                 // Methods
  87                 public override IPermission CreatePermission ()
  88                 {
  89                         return null;      // Not used, used for inheritance from SecurityAttribute
  90                 }
  91
  92                 private PermissionSet CreateFromXml (string xml)
  93                 {
  94                         SecurityParser sp = new SecurityParser ();
  95                         sp.LoadXml (xml);
  96                         SecurityElement se = sp.ToXml ();
  97
  98                         string className = se.Attribute ("class");
  99                         if (className == null)
 100                                 return null;
 101
 102                         PermissionState state = PermissionState.None;
 103                         if (se.Attribute ("Unrestricted") == "true")
 104                                 state = PermissionState.Unrestricted;
 105
 106                         if (className.EndsWith ("NamedPermissionSet")) {
 107                                 NamedPermissionSet nps = new NamedPermissionSet (se.Attribute ("Name"), state);
 108                                 return (PermissionSet) nps;
 109                         }
 110                         else if (className.EndsWith ("PermissionSet")) {
 111                                 PermissionSet ps = new PermissionSet (state);
 112                                 return ps;
 113                         }
 114                         return null;
 115                 }
 116
 117                 public PermissionSet CreatePermissionSet ()
 118                 {
 119                         PermissionSet pset = null;
 120                         if (this.Unrestricted)
 121                                 pset = new PermissionSet (PermissionState.Unrestricted);
 122                         else {
 123                                 pset = new PermissionSet (PermissionState.None);
 124                                 if (name != null) {
 125                                         return PolicyLevel.CreateAppDomainLevel ().GetNamedPermissionSet (name);
 126                                 }
 127                                 else if (file != null) {
 128                                         Encoding e = ((isUnicodeEncoded) ? System.Text.Encoding.Unicode : System.Text.Encoding.ASCII);
 129                                         using (StreamReader sr = new StreamReader (file, e)) {
 130                                                 pset = CreateFromXml (sr.ReadToEnd ());
 131                                         }
 132                                 }
 133                                 else if (xml != null) {
 134                                         pset = CreateFromXml (xml);
 135                                 }
 136                         }
 137                         return pset;
 138                 }
 139         }
 140 }