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//
// System.Security.Permissions.IsolatedStoragePermission.cs
//
// Authors:
// Piers Haken <piersh@friskit.com>
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002 Ximian, Inc. http://www.ximian.com
// Copyright (C) 2004-2006 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Globalization;
using System.Runtime.InteropServices;
namespace System.Security.Permissions {
[Serializable]
[SecurityPermission (SecurityAction.InheritanceDemand, ControlEvidence = true, ControlPolicy = true)]
[ComVisible (true)]
public abstract class IsolatedStoragePermission : CodeAccessPermission, IUnrestrictedPermission {
private const int version = 1;
internal long m_userQuota;
internal long m_machineQuota;
internal long m_expirationDays;
internal bool m_permanentData;
internal IsolatedStorageContainment m_allowed;
protected IsolatedStoragePermission (PermissionState state)
{
if (CheckPermissionState (state, true) == PermissionState.Unrestricted) {
UsageAllowed = IsolatedStorageContainment.UnrestrictedIsolatedStorage;
}
}
public long UserQuota {
get { return m_userQuota; }
set { m_userQuota = value; }
}
public IsolatedStorageContainment UsageAllowed {
get { return m_allowed; }
set {
if (!Enum.IsDefined (typeof (IsolatedStorageContainment), value)) {
string msg = String.Format (Locale.GetText ("Invalid enum {0}"), value);
throw new ArgumentException (msg, "IsolatedStorageContainment");
}
m_allowed = value;
if (m_allowed == IsolatedStorageContainment.UnrestrictedIsolatedStorage) {
m_userQuota = Int64.MaxValue;
m_machineQuota = Int64.MaxValue;
m_expirationDays = Int64.MaxValue ;
m_permanentData = true;
}
}
}
public bool IsUnrestricted ()
{
return IsolatedStorageContainment.UnrestrictedIsolatedStorage == m_allowed;
}
public override SecurityElement ToXml ()
{
SecurityElement se = Element (version);
if (m_allowed == IsolatedStorageContainment.UnrestrictedIsolatedStorage)
se.AddAttribute ("Unrestricted", "true");
else {
se.AddAttribute ("Allowed", m_allowed.ToString ());
if (m_userQuota > 0)
se.AddAttribute ("UserQuota", m_userQuota.ToString ());
}
return se;
}
public override void FromXml (SecurityElement esd)
{
// General validation in CodeAccessPermission
CheckSecurityElement (esd, "esd", version, version);
// Note: we do not (yet) care about the return value
// as we only accept version 1 (min/max values)
m_userQuota = 0;
m_machineQuota = 0;
m_expirationDays = 0;
m_permanentData = false;
m_allowed = IsolatedStorageContainment.None;
if (IsUnrestricted (esd)) {
UsageAllowed = IsolatedStorageContainment.UnrestrictedIsolatedStorage;
} else {
string a = esd.Attribute ("Allowed");
if (a != null) {
UsageAllowed = (IsolatedStorageContainment) Enum.Parse (
typeof (IsolatedStorageContainment), a);
}
a = esd.Attribute ("UserQuota");
if (a != null) {
m_userQuota = Int64.Parse (a, CultureInfo.InvariantCulture);
}
}
}
// helpers
internal bool IsEmpty ()
{
// should we include internals ? or just publics ?
return ((m_userQuota == 0) && (m_allowed == IsolatedStorageContainment.None));
}
}
}
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