//
// System.Security.Policy.GacMembershipCondition.cs
//
// Author:
// Sebastien Pouliot <sebastien@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.Collections;
using System.Security.Permissions;
using System.Runtime.InteropServices;
namespace System.Security.Policy{
[Serializable]
[ComVisible (true)]
public sealed class GacMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
private readonly int version = 1;
public GacMembershipCondition ()
{
}
public bool Check (Evidence evidence)
{
if (evidence == null)
return false;
// true only if Gac is in host-supplied evidences
IEnumerator e = evidence.GetHostEnumerator ();
while (e.MoveNext ()) {
if (e.Current is GacInstalled)
return true;
}
return false;
}
public IMembershipCondition Copy ()
{
return new GacMembershipCondition ();
}
public override bool Equals (object o)
{
if (o == null)
return false;
return (o is GacMembershipCondition);
}
public void FromXml (SecurityElement e)
{
FromXml (e, null);
}
public void FromXml (SecurityElement e, PolicyLevel level)
{
MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
// PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
}
public override int GetHashCode ()
{
return 0; // always the same
}
// LAMESPEC: "Gac" is documented - but Fx 2.0 beta 1 returns "GAC"
public override string ToString ()
{
return "GAC";
}
public SecurityElement ToXml ()
{
return ToXml (null);
}
public SecurityElement ToXml (PolicyLevel level)
{
// PolicyLevel isn't used as there's no need to resolve NamedPermissionSet references
SecurityElement se = MembershipConditionHelper.Element (typeof (GacMembershipCondition), version);
// nothing to add
return se;
}
}
}
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