mcs/class/System.Security/System.Security.Permissions/DataProtectionPermissionAttribute.cs

   1 //
   2 // System.Security.Permissions.DataProtectionPermissionAttribute class
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_2_0
  30
  31 using System.Globalization;
  32
  33 namespace System.Security.Permissions {
  34
  35         [AttributeUsage (AttributeTargets.Assembly | AttributeTargets.Class |
  36                 AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method,
  37                 AllowMultiple = true, Inherited = false)]
  38         [Serializable]
  39         public sealed class DataProtectionPermissionAttribute : CodeAccessSecurityAttribute {
  40
  41                 private DataProtectionPermissionFlags _flags;
  42
  43                 public DataProtectionPermissionAttribute (SecurityAction action)
  44                         : base (action)
  45                 {
  46                         _flags = DataProtectionPermissionFlags.NoFlags;
  47                 }
  48
  49
  50                 public DataProtectionPermissionFlags Flags {
  51                         get { return _flags; }
  52                         set {
  53                                 if ((value & DataProtectionPermissionFlags.AllFlags) != value) {
  54                                         string msg = String.Format (Locale.GetText ("Invalid flags {0}"), value);
  55                                         throw new ArgumentException (msg, "DataProtectionPermissionFlags");
  56                                 }
  57
  58                                 _flags = value;
  59                         }
  60                 }
  61
  62                 public bool ProtectData {
  63                         get { return ((_flags & DataProtectionPermissionFlags.ProtectData) != 0); }
  64                         set {
  65                                 if (value) {
  66                                         _flags |= DataProtectionPermissionFlags.ProtectData;
  67                                 }
  68                                 else {
  69                                         _flags &= DataProtectionPermissionFlags.ProtectData;
  70                                 }
  71                         }
  72                 }
  73
  74                 public bool UnprotectData {
  75                         get { return ((_flags & DataProtectionPermissionFlags.UnprotectData) != 0); }
  76                         set {
  77                                 if (value) {
  78                                         _flags |= DataProtectionPermissionFlags.UnprotectData;
  79                                 }
  80                                 else {
  81                                         _flags &= DataProtectionPermissionFlags.UnprotectData;
  82                                 }
  83                         }
  84                 }
  85
  86                 public bool ProtectMemory {
  87                         get { return ((_flags & DataProtectionPermissionFlags.ProtectMemory) != 0); }
  88                         set {
  89                                 if (value) {
  90                                         _flags |= DataProtectionPermissionFlags.ProtectMemory;
  91                                 }
  92                                 else {
  93                                         _flags &= DataProtectionPermissionFlags.ProtectMemory;
  94                                 }
  95                         }
  96                 }
  97
  98                 public bool UnprotectMemory {
  99                         get { return ((_flags & DataProtectionPermissionFlags.UnprotectMemory) != 0); }
 100                         set {
 101                                 if (value) {
 102                                         _flags |= DataProtectionPermissionFlags.UnprotectMemory;
 103                                 }
 104                                 else {
 105                                         _flags &= DataProtectionPermissionFlags.UnprotectMemory;
 106                                 }
 107                         }
 108                 }
 109
 110
 111                 public override IPermission CreatePermission ()
 112                 {
 113                         DataProtectionPermission perm = null;
 114                         if (this.Unrestricted)
 115                                 perm = new DataProtectionPermission (PermissionState.Unrestricted);
 116                         else
 117                                 perm = new DataProtectionPermission (_flags);
 118                         return perm;
 119                 }
 120         }
 121 }
 122
 123 #endif