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//
// System.Security.Policy.FileCodeGroup
//
// Author(s):
// Nick Drochak (ndrochak@gol.com)
//
// (C) 2001 Nick Drochak, All rights reserved.
// 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.Runtime.InteropServices;
using System.Security.Permissions;
namespace System.Security.Policy {
[Serializable]
[ComVisible (true)]
public sealed class FileCodeGroup : CodeGroup {
private FileIOPermissionAccess m_access;
public FileCodeGroup (IMembershipCondition membershipCondition, FileIOPermissionAccess access)
: base (membershipCondition, null)
{
// note: FileIOPermissionAccess is a [Flag]
m_access = access;
}
// for PolicyLevel (to avoid validation duplication)
internal FileCodeGroup (SecurityElement e, PolicyLevel level)
: base (e, level)
{
}
public override CodeGroup Copy ()
{
FileCodeGroup copy = new FileCodeGroup (MembershipCondition, m_access);
copy.Name = this.Name;
copy.Description = this.Description;
foreach (CodeGroup child in Children) {
copy.AddChild (child.Copy ()); // deep copy
}
return copy;
}
public override string MergeLogic {
get { return "Union";}
}
public override PolicyStatement Resolve (Evidence evidence)
{
if (null == evidence)
throw new ArgumentNullException("evidence");
if (!MembershipCondition.Check (evidence))
return null;
PermissionSet ps = null;
if (this.PolicyStatement == null)
ps = new PermissionSet (PermissionState.None);
else
ps = this.PolicyStatement.PermissionSet.Copy ();
if (this.Children.Count > 0) {
foreach (CodeGroup child_cg in this.Children) {
PolicyStatement child_pst = child_cg.Resolve (evidence);
if (child_pst != null) {
ps = ps.Union (child_pst.PermissionSet);
}
}
}
PolicyStatement pst = null;
if (this.PolicyStatement != null)
pst = this.PolicyStatement.Copy ();
else
pst = PolicyStatement.Empty ();
pst.PermissionSet = ps;
return pst;
}
public override CodeGroup ResolveMatchingCodeGroups(Evidence evidence)
{
if (null == evidence)
throw new ArgumentNullException("evidence");
if (!MembershipCondition.Check (evidence))
return null;
FileCodeGroup matchRoot = new FileCodeGroup (MembershipCondition, m_access);
foreach (CodeGroup child in Children) {
CodeGroup childMatchingCodeGroup = child.ResolveMatchingCodeGroups (evidence);
if (childMatchingCodeGroup != null)
matchRoot.AddChild (childMatchingCodeGroup);
}
return matchRoot;
}
public override string AttributeString {
get { return null; }
}
public override string PermissionSetName {
get { return "Same directory FileIO - " + m_access.ToString (); }
}
public override bool Equals (object o)
{
if (!(o is FileCodeGroup))
return false;
if (this.m_access != ((FileCodeGroup)o).m_access)
return false;
return Equals((CodeGroup)o, false);
}
public override int GetHashCode ()
{
return m_access.GetHashCode ();
}
protected override void ParseXml (SecurityElement e, PolicyLevel level)
{
string a = e.Attribute ("Access");
if (a != null)
m_access = (FileIOPermissionAccess) Enum.Parse (typeof (FileIOPermissionAccess), a, true);
else
m_access = FileIOPermissionAccess.NoAccess;
}
protected override void CreateXml (SecurityElement element, PolicyLevel level)
{
element.AddAttribute ("Access", m_access.ToString ());
}
}
}
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