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  <sebastien@ximian.com>
   7 //
   8 // (C) 2002 Ximian, Inc. http://www.ximian.com
   9 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.IO;
  32 using System.Security.Policy;
  33 using System.Text;
  34
  35 using Mono.Xml;
  36
  37 namespace System.Security.Permissions {
  38
  39         [AttributeUsage (AttributeTargets.Assembly | AttributeTargets.Class |
  40                          AttributeTargets.Struct | AttributeTargets.Constructor |
  41                          AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
  42         [Serializable]
  43         public sealed class PermissionSetAttribute : CodeAccessSecurityAttribute {
  44
  45                 // Fields
  46                 private string file;
  47                 private string name;
  48                 private bool isUnicodeEncoded;
  49                 private string xml;
  50 #if NET_2_0
  51                 private string hex;
  52 #endif
  53
  54                 // Constructor
  55                 public PermissionSetAttribute (SecurityAction action)
  56                         : base (action)
  57                 {
  58                 }
  59
  60                 // Properties
  61                 public string File {
  62                         get { return file; }
  63                         set { file = value; }
  64                 }
  65 #if NET_2_0
  66                 [MonoTODO ("Undocumented")]
  67                 public string Hex {
  68                         get { return hex; }
  69                         set { hex = value; }
  70                 }
  71 #endif
  72                 public string Name {
  73                         get { return name; }
  74                         set { name = value; }
  75                 }
  76
  77                 public bool UnicodeEncoded {
  78                         get { return isUnicodeEncoded; }
  79                         set { isUnicodeEncoded = value; }
  80                 }
  81
  82                 public string XML {
  83                         get { return xml; }
  84                         set { xml = value; }
  85                 }
  86
  87                 // Methods
  88                 public override IPermission CreatePermission ()
  89                 {
  90                         return null;      // Not used, used for inheritance from SecurityAttribute
  91                 }
  92
  93                 private PermissionSet CreateFromXml (string xml)
  94                 {
  95                         SecurityParser sp = new SecurityParser ();
  96                         sp.LoadXml (xml);
  97                         SecurityElement se = sp.ToXml ();
  98
  99                         string className = se.Attribute ("class");
 100                         if (className == null)
 101                                 return null;
 102
 103                         PermissionState state = PermissionState.None;
 104                         if (CodeAccessPermission.IsUnrestricted (se))
 105                                 state = PermissionState.Unrestricted;
 106
 107                         if (className.EndsWith ("NamedPermissionSet")) {
 108                                 NamedPermissionSet nps = new NamedPermissionSet (se.Attribute ("Name"), state);
 109                                 return (PermissionSet) nps;
 110                         }
 111                         else if (className.EndsWith ("PermissionSet")) {
 112                                 PermissionSet ps = new PermissionSet (state);
 113                                 return ps;
 114                         }
 115                         return null;
 116                 }
 117
 118                 public PermissionSet CreatePermissionSet ()
 119                 {
 120                         PermissionSet pset = null;
 121                         if (this.Unrestricted)
 122                                 pset = new PermissionSet (PermissionState.Unrestricted);
 123                         else {
 124                                 pset = new PermissionSet (PermissionState.None);
 125                                 if (name != null) {
 126                                         return PolicyLevel.CreateAppDomainLevel ().GetNamedPermissionSet (name);
 127                                 }
 128                                 else if (file != null) {
 129                                         Encoding e = ((isUnicodeEncoded) ? System.Text.Encoding.Unicode : System.Text.Encoding.ASCII);
 130                                         using (StreamReader sr = new StreamReader (file, e)) {
 131                                                 pset = CreateFromXml (sr.ReadToEnd ());
 132                                         }
 133                                 }
 134                                 else if (xml != null) {
 135                                         pset = CreateFromXml (xml);
 136                                 }
 137                         }
 138                         return pset;
 139                 }
 140         }
 141 }