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

   1 //
   2 // System.Security.Permissions.IsolatedStorageFilePermission.cs
   3 //
   4 // Author
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2003 Motus Technologies. http://www.motus.com
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Runtime.InteropServices;
  31
  32 namespace System.Security.Permissions {
  33
  34         [Serializable]
  35         public sealed class IsolatedStorageFilePermission : IsolatedStoragePermission, IBuiltInPermission {
  36
  37                 private const int version = 1;
  38
  39                 // Constructors
  40
  41                 [MonoTODO ("usage/quota calculated from evidences/policy")]
  42                 public IsolatedStorageFilePermission (PermissionState state) : base (state)
  43                 {
  44                         if (!IsUnrestricted ()) {
  45                                 // TODO
  46                         }
  47                 }
  48
  49                 // Properties
  50
  51                 // Methods
  52
  53                 public override IPermission Copy ()
  54                 {
  55                         IsolatedStorageFilePermission p = new IsolatedStorageFilePermission (PermissionState.None);
  56                         p.m_userQuota = m_userQuota;
  57                         p.m_machineQuota = m_machineQuota;
  58                         p.m_expirationDays = m_expirationDays;
  59                         p.m_permanentData = m_permanentData;
  60                         p.m_allowed = m_allowed;
  61                         return p;
  62                 }
  63
  64                 public override IPermission Intersect (IPermission target)
  65                 {
  66                         IsolatedStorageFilePermission isfp = Cast (target);
  67                         if (isfp == null)
  68                                 return null;
  69                         if (IsEmpty () && isfp.IsEmpty ())
  70                                 return null;
  71
  72                         IsolatedStorageFilePermission p = new IsolatedStorageFilePermission (PermissionState.None);
  73                         p.m_userQuota = (m_userQuota < isfp.m_userQuota) ? m_userQuota : isfp.m_userQuota;
  74                         p.m_machineQuota = (m_machineQuota < isfp.m_machineQuota) ? m_machineQuota : isfp.m_machineQuota;
  75                         p.m_expirationDays = (m_expirationDays < isfp.m_expirationDays) ? m_expirationDays : isfp.m_expirationDays;
  76                         p.m_permanentData = (m_permanentData && isfp.m_permanentData);
  77                         // UsageAllowed == Unrestricted is a special case handled by the property
  78                         p.UsageAllowed = (m_allowed < isfp.m_allowed) ? m_allowed : isfp.m_allowed;
  79                         return p;
  80                 }
  81
  82                 public override bool IsSubsetOf (IPermission target)
  83                 {
  84                         IsolatedStorageFilePermission isfp = Cast (target);
  85                         if (isfp == null)
  86                                 return IsEmpty ();
  87                         if (isfp.IsUnrestricted ())
  88                                 return true;
  89
  90                         if (m_userQuota > isfp.m_userQuota)
  91                                 return false;
  92                         if (m_machineQuota > isfp.m_machineQuota)
  93                                 return false;
  94                         if (m_expirationDays > isfp.m_expirationDays)
  95                                 return false;
  96                         if (m_permanentData != isfp.m_permanentData)
  97                                 return false;
  98                         if (m_allowed > isfp.m_allowed)
  99                                 return false;
 100                         return true;
 101                 }
 102
 103                 public override IPermission Union (IPermission target)
 104                 {
 105                         IsolatedStorageFilePermission isfp = Cast (target);
 106                         if (isfp == null)
 107                                 return Copy ();
 108
 109                         IsolatedStorageFilePermission p = new IsolatedStorageFilePermission (PermissionState.None);
 110                         p.m_userQuota = (m_userQuota > isfp.m_userQuota) ? m_userQuota : isfp.m_userQuota;
 111                         p.m_machineQuota = (m_machineQuota > isfp.m_machineQuota) ? m_machineQuota : isfp.m_machineQuota;
 112                         p.m_expirationDays = (m_expirationDays > isfp.m_expirationDays) ? m_expirationDays : isfp.m_expirationDays;
 113                         p.m_permanentData = (m_permanentData || isfp.m_permanentData);
 114                         // UsageAllowed == Unrestricted is a special case handled by the property
 115                         p.UsageAllowed = (m_allowed > isfp.m_allowed) ? m_allowed : isfp.m_allowed;
 116                         return p;
 117                 }
 118
 119 #if NET_2_0
 120                 [MonoTODO]
 121                 [ComVisible (false)]
 122                 public override SecurityElement ToXml ()
 123                 {
 124                         SecurityElement se = base.ToXml ();
 125                         // TODO - something must have been added ???
 126                         return se;
 127                 }
 128 #endif
 129
 130                 // IBuiltInPermission
 131                 int IBuiltInPermission.GetTokenIndex ()
 132                 {
 133                         return (int) BuiltInToken.IsolatedStorageFile;
 134                 }
 135
 136                 // helpers
 137
 138                 private IsolatedStorageFilePermission Cast (IPermission target)
 139                 {
 140                         if (target == null)
 141                                 return null;
 142
 143                         IsolatedStorageFilePermission isfp = (target as IsolatedStorageFilePermission);
 144                         if (isfp == null) {
 145                                 ThrowInvalidPermission (target, typeof (IsolatedStorageFilePermission));
 146                         }
 147
 148                         return isfp;
 149                 }
 150         }
 151 }