class/corlib/System.Security.Permissions/ReflectionPermissionAttribute.cs

   1 //
   2 // System.Security.Permissions.ReflectionPermissionAttribute.cs
   3 //
   4 // Authors
   5 //      Duncan Mak <duncan@ximian.com>
   6 //      Sebastien Pouliot <spouliot@motus.com>
   7 //
   8 // (C) 2002 Ximian, Inc. http://www.ximian.com
   9 // Portions Copyright (C) 2003 Motus Technologies (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.Runtime.InteropServices;
  33
  34 namespace System.Security.Permissions {
  35
  36         [ComVisible (true)]
  37         [AttributeUsage (AttributeTargets.Assembly | AttributeTargets.Class |
  38                          AttributeTargets.Struct | AttributeTargets.Constructor |
  39                          AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
  40         [Serializable]
  41         public sealed class ReflectionPermissionAttribute : CodeAccessSecurityAttribute {
  42
  43                 // Fields
  44                 private ReflectionPermissionFlag flags;
  45                 private bool memberAccess;
  46                 private bool reflectionEmit;
  47                 private bool typeInfo;
  48
  49                 //Constructor
  50                 public ReflectionPermissionAttribute (SecurityAction action) : base (action) {}
  51
  52                 // Properties
  53                 public ReflectionPermissionFlag Flags
  54                 {
  55                         get { return flags; }
  56                         set {
  57                                 flags = value;
  58                                 memberAccess = ((flags & ReflectionPermissionFlag.MemberAccess) == ReflectionPermissionFlag.MemberAccess);
  59                                 reflectionEmit = ((flags & ReflectionPermissionFlag.ReflectionEmit) == ReflectionPermissionFlag.ReflectionEmit);
  60                                 typeInfo = ((flags & ReflectionPermissionFlag.TypeInformation) == ReflectionPermissionFlag.TypeInformation);
  61                         }
  62                 }
  63
  64                 public bool MemberAccess
  65                 {
  66                         get { return memberAccess; }
  67                         set {
  68                                 if (value)
  69                                         flags |= ReflectionPermissionFlag.MemberAccess;
  70                                 else
  71                                         flags -= ReflectionPermissionFlag.MemberAccess;
  72                                 memberAccess = value;
  73                         }
  74                 }
  75
  76                 public bool ReflectionEmit
  77                 {
  78                         get { return reflectionEmit; }
  79                         set {
  80                                 if (value)
  81                                         flags |= ReflectionPermissionFlag.ReflectionEmit;
  82                                 else
  83                                         flags -= ReflectionPermissionFlag.ReflectionEmit;
  84                                 reflectionEmit = value;
  85                         }
  86                 }
  87
  88                 public bool RestrictedMemberAccess
  89                 {
  90                         get { return ((flags & ReflectionPermissionFlag.RestrictedMemberAccess) == ReflectionPermissionFlag.RestrictedMemberAccess); }
  91                         set {
  92                                 if (value)
  93                                         flags |= ReflectionPermissionFlag.RestrictedMemberAccess;
  94                                 else
  95                                         flags -= ReflectionPermissionFlag.RestrictedMemberAccess;
  96                         }
  97                 }
  98
  99                 [Obsolete ("not enforced in 2.0+")]
 100                 public bool TypeInformation
 101                 {
 102                         get { return typeInfo; }
 103                         set {
 104                                 if (value)
 105                                         flags |= ReflectionPermissionFlag.TypeInformation;
 106                                 else
 107                                         flags -= ReflectionPermissionFlag.TypeInformation;
 108                                 typeInfo = value;
 109                         }
 110                 }
 111
 112                 // Methods
 113                 public override IPermission CreatePermission ()
 114                 {
 115 #if NET_2_1
 116                         return null;
 117 #else
 118                         ReflectionPermission perm = null;
 119                         if (this.Unrestricted)
 120                                 perm = new ReflectionPermission (PermissionState.Unrestricted);
 121                         else
 122                                 perm = new ReflectionPermission (flags);
 123                         return perm;
 124 #endif
 125                 }
 126         }
 127 }