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

   1 //
   2 // System.Security.Permissions.IsolatedStoragePermission.cs
   3 //
   4 // Authors:
   5 //      Piers Haken <piersh@friskit.com>
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2002 Ximian, Inc.                        http://www.ximian.com
   9 // Copyright (C) 2004-2006 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.Globalization;
  32 using System.Runtime.InteropServices;
  33
  34 namespace System.Security.Permissions {
  35
  36         [Serializable]
  37         [SecurityPermission (SecurityAction.InheritanceDemand, ControlEvidence = true, ControlPolicy = true)]
  38 #if NET_2_0
  39         [ComVisible (true)]
  40 #endif
  41         public abstract class IsolatedStoragePermission : CodeAccessPermission, IUnrestrictedPermission {
  42
  43                 private const int version = 1;
  44
  45                 internal long m_userQuota;
  46                 internal long m_machineQuota;
  47                 internal long m_expirationDays;
  48                 internal bool m_permanentData;
  49                 internal IsolatedStorageContainment m_allowed;
  50
  51 #if NET_2_0
  52                 protected IsolatedStoragePermission (PermissionState state)
  53 #else
  54                 public IsolatedStoragePermission (PermissionState state)
  55 #endif
  56                 {
  57                         if (CheckPermissionState (state, true) == PermissionState.Unrestricted) {
  58                                 UsageAllowed = IsolatedStorageContainment.UnrestrictedIsolatedStorage;
  59                         }
  60                 }
  61
  62                 public long UserQuota {
  63                         get { return m_userQuota; }
  64                         set { m_userQuota = value; }
  65                 }
  66
  67                 public IsolatedStorageContainment UsageAllowed {
  68                         get { return m_allowed; }
  69                         set {
  70                                 if (!Enum.IsDefined (typeof (IsolatedStorageContainment), value)) {
  71                                         string msg = String.Format (Locale.GetText ("Invalid enum {0}"), value);
  72                                         throw new ArgumentException (msg, "IsolatedStorageContainment");
  73                                 }
  74                                 m_allowed = value;
  75                                 if (m_allowed == IsolatedStorageContainment.UnrestrictedIsolatedStorage) {
  76                                         m_userQuota = Int64.MaxValue;
  77                                         m_machineQuota = Int64.MaxValue;
  78                                         m_expirationDays = Int64.MaxValue ;
  79                                         m_permanentData = true;
  80                                 }
  81                         }
  82                 }
  83
  84
  85                 public bool IsUnrestricted ()
  86                 {
  87                         return IsolatedStorageContainment.UnrestrictedIsolatedStorage == m_allowed;
  88                 }
  89
  90                 public override SecurityElement ToXml ()
  91                 {
  92                         SecurityElement se = Element (version);
  93
  94                         if (m_allowed == IsolatedStorageContainment.UnrestrictedIsolatedStorage)
  95                                 se.AddAttribute ("Unrestricted", "true");
  96                         else {
  97                                 se.AddAttribute ("Allowed", m_allowed.ToString ());
  98                                 if (m_userQuota > 0)
  99                                         se.AddAttribute ("UserQuota", m_userQuota.ToString ());
 100                         }
 101
 102                         return se;
 103                 }
 104
 105                 public override void FromXml (SecurityElement esd)
 106                 {
 107                         // General validation in CodeAccessPermission
 108                         CheckSecurityElement (esd, "esd", version, version);
 109                         // Note: we do not (yet) care about the return value
 110                         // as we only accept version 1 (min/max values)
 111
 112                         m_userQuota = 0;
 113                         m_machineQuota = 0;
 114                         m_expirationDays = 0;
 115                         m_permanentData = false;
 116                         m_allowed = IsolatedStorageContainment.None;
 117
 118                         if (IsUnrestricted (esd)) {
 119                                 UsageAllowed = IsolatedStorageContainment.UnrestrictedIsolatedStorage;
 120                         } else {
 121                                 string a = esd.Attribute ("Allowed");
 122                                 if (a != null) {
 123                                         UsageAllowed = (IsolatedStorageContainment) Enum.Parse (
 124                                                 typeof (IsolatedStorageContainment), a);
 125                                 }
 126                                 a = esd.Attribute ("UserQuota");
 127                                 if (a != null) {
 128                                         Exception exc;
 129                                         Int64.Parse (a, true, out m_userQuota, out exc);
 130                                 }
 131                         }
 132                 }
 133
 134                 // helpers
 135
 136                 internal bool IsEmpty ()
 137                 {
 138                         // should we include internals ? or just publics ?
 139                         return ((m_userQuota == 0) && (m_allowed == IsolatedStorageContainment.None));
 140                 }
 141         }
 142 }