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
  30 using System.Globalization;
  31
  32 namespace System.Security.Permissions {
  33
  34         [AttributeUsage (AttributeTargets.Assembly | AttributeTargets.Class |
  35                 AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method,
  36                 AllowMultiple = true, Inherited = false)]
  37         [Serializable]
  38         public sealed class DataProtectionPermissionAttribute : CodeAccessSecurityAttribute {
  39
  40                 private DataProtectionPermissionFlags _flags;
  41
  42                 public DataProtectionPermissionAttribute (SecurityAction action)
  43                         : base (action)
  44                 {
  45                 }
  46
  47
  48                 public DataProtectionPermissionFlags Flags {
  49                         get { return _flags; }
  50                         set {
  51                                 if ((value & DataProtectionPermissionFlags.AllFlags) != value) {
  52                                         string msg = String.Format (Locale.GetText ("Invalid flags {0}"), value);
  53                                         throw new ArgumentException (msg, "DataProtectionPermissionFlags");
  54                                 }
  55
  56                                 _flags = value;
  57                         }
  58                 }
  59
  60                 public bool ProtectData {
  61                         get { return ((_flags & DataProtectionPermissionFlags.ProtectData) != 0); }
  62                         set {
  63                                 if (value) {
  64                                         _flags |= DataProtectionPermissionFlags.ProtectData;
  65                                 }
  66                                 else {
  67                                         _flags &= ~DataProtectionPermissionFlags.ProtectData;
  68                                 }
  69                         }
  70                 }
  71
  72                 public bool UnprotectData {
  73                         get { return ((_flags & DataProtectionPermissionFlags.UnprotectData) != 0); }
  74                         set {
  75                                 if (value) {
  76                                         _flags |= DataProtectionPermissionFlags.UnprotectData;
  77                                 }
  78                                 else {
  79                                         _flags &= ~DataProtectionPermissionFlags.UnprotectData;
  80                                 }
  81                         }
  82                 }
  83
  84                 public bool ProtectMemory {
  85                         get { return ((_flags & DataProtectionPermissionFlags.ProtectMemory) != 0); }
  86                         set {
  87                                 if (value) {
  88                                         _flags |= DataProtectionPermissionFlags.ProtectMemory;
  89                                 }
  90                                 else {
  91                                         _flags &= ~DataProtectionPermissionFlags.ProtectMemory;
  92                                 }
  93                         }
  94                 }
  95
  96                 public bool UnprotectMemory {
  97                         get { return ((_flags & DataProtectionPermissionFlags.UnprotectMemory) != 0); }
  98                         set {
  99                                 if (value) {
 100                                         _flags |= DataProtectionPermissionFlags.UnprotectMemory;
 101                                 }
 102                                 else {
 103                                         _flags &= ~DataProtectionPermissionFlags.UnprotectMemory;
 104                                 }
 105                         }
 106                 }
 107
 108
 109                 public override IPermission CreatePermission ()
 110                 {
 111                         DataProtectionPermission perm = null;
 112                         if (this.Unrestricted)
 113                                 perm = new DataProtectionPermission (PermissionState.Unrestricted);
 114                         else
 115                                 perm = new DataProtectionPermission (_flags);
 116                         return perm;
 117                 }
 118         }
 119 }
 120