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//
// System.Security.Permissions.ZoneIdentityPermission
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002 Ximian, Inc (http://www.ximian.com)
// Copyright (C) 2004-2005 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 {
#if NET_2_0
[ComVisible (true)]
#endif
[Serializable]
public sealed class ZoneIdentityPermission : CodeAccessPermission, IBuiltInPermission {
private const int version = 1;
private SecurityZone zone;
public ZoneIdentityPermission (PermissionState state)
{
// false == do not allow Unrestricted for Identity Permissions
CheckPermissionState (state, false);
// default values
zone = SecurityZone.NoZone;
}
public ZoneIdentityPermission (SecurityZone zone)
{
// also needs the validations
SecurityZone = zone;
}
public override IPermission Copy ()
{
return new ZoneIdentityPermission (zone);
}
public override bool IsSubsetOf (IPermission target)
{
ZoneIdentityPermission zip = Cast (target);
if (zip == null)
return (zone == SecurityZone.NoZone);
return ((zone == SecurityZone.NoZone) || (zone == zip.zone));
}
public override IPermission Union (IPermission target)
{
ZoneIdentityPermission zip = Cast (target);
if (zip == null)
return (zone == SecurityZone.NoZone) ? null : Copy ();
if (zone == zip.zone || zip.zone == SecurityZone.NoZone)
return Copy ();
if (zone == SecurityZone.NoZone)
return zip.Copy ();
#if NET_2_0
throw new ArgumentException (Locale.GetText (
"Union impossible"));
#else
return null;
#endif
}
public override IPermission Intersect (IPermission target)
{
ZoneIdentityPermission zip = Cast (target);
if (zip == null || zone == SecurityZone.NoZone)
return null;
if (zone == zip.zone)
return Copy ();
return null;
}
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)
string zoneName = esd.Attribute ("Zone");
if (zoneName == null)
zone = SecurityZone.NoZone;
else
zone = (SecurityZone) Enum.Parse (typeof (SecurityZone), zoneName);
}
public override SecurityElement ToXml ()
{
SecurityElement se = Element (version);
if (zone != SecurityZone.NoZone)
se.AddAttribute ("Zone", zone.ToString ());
return se;
}
public SecurityZone SecurityZone {
get { return zone; }
set {
if (!Enum.IsDefined (typeof (SecurityZone), value)) {
string msg = String.Format (Locale.GetText ("Invalid enum {0}"), value);
throw new ArgumentException (msg, "SecurityZone");
}
zone = value;
}
}
// IBuiltInPermission
int IBuiltInPermission.GetTokenIndex ()
{
return (int) BuiltInToken.ZoneIdentity;
}
// helpers
private ZoneIdentityPermission Cast (IPermission target)
{
if (target == null)
return null;
ZoneIdentityPermission zip = (target as ZoneIdentityPermission);
if (zip == null) {
ThrowInvalidPermission (target, typeof (ZoneIdentityPermission));
}
return zip;
}
}
}
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