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//
// System.Security.Policy.StrongNameMembershipCondition.cs
//
// Author:
// Duncan Mak (duncan@ximian.com)
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2003 Duncan Mak, Ximian Inc.
// 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.Globalization;
using System.Security.Permissions;
using System.Runtime.InteropServices;
using System.Text;
namespace System.Security.Policy {
[Serializable]
[ComVisible (true)]
public sealed class StrongNameMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
private readonly int version = 1;
private StrongNamePublicKeyBlob blob;
private string name;
private Version assemblyVersion;
public StrongNameMembershipCondition (StrongNamePublicKeyBlob blob, string name, Version version)
{
if (blob == null)
throw new ArgumentNullException ("blob");
this.blob = blob;
this.name = name;
if (version != null)
assemblyVersion = (Version) version.Clone ();
}
// for PolicyLevel (to avoid validation duplication)
internal StrongNameMembershipCondition (SecurityElement e)
{
FromXml (e);
}
// so System.Activator.CreateInstance can create an instance...
internal StrongNameMembershipCondition ()
{
}
// properties
public string Name {
get { return name; }
set { name = value; }
}
public Version Version {
get { return assemblyVersion; }
set { assemblyVersion = value; }
}
public StrongNamePublicKeyBlob PublicKey {
get { return blob; }
set {
if (value == null)
throw new ArgumentNullException ("PublicKey");
blob = value;
}
}
public bool Check (Evidence evidence)
{
if (evidence == null)
return false;
IEnumerator e = evidence.GetHostEnumerator ();
while (e.MoveNext ()) {
StrongName sn = (e.Current as StrongName);
if (sn != null) {
if (!sn.PublicKey.Equals (blob))
return false;
if ((name != null) && (name != sn.Name))
return false;
if ((assemblyVersion != null) && !assemblyVersion.Equals (sn.Version))
return false;
return true;
}
}
return false;
}
public IMembershipCondition Copy ()
{
return new StrongNameMembershipCondition (blob, name, assemblyVersion);
}
public override bool Equals (object o)
{
StrongNameMembershipCondition snmc = (o as StrongNameMembershipCondition);
if (snmc == null)
return false;
if (!snmc.PublicKey.Equals (PublicKey))
return false;
if (name != snmc.Name)
return false;
if (assemblyVersion != null)
return assemblyVersion.Equals (snmc.Version);
return (snmc.Version == null);
}
public override int GetHashCode ()
{
// name and version aren't part of the calculation
return blob.GetHashCode ();
}
public void FromXml (SecurityElement e)
{
FromXml (e, null);
}
public void FromXml (SecurityElement e, PolicyLevel level)
{
MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
blob = StrongNamePublicKeyBlob.FromString (e.Attribute ("PublicKeyBlob"));
name = e.Attribute ("Name");
string v = (string) e.Attribute ("AssemblyVersion");
if (v == null)
assemblyVersion = null;
else
assemblyVersion = new Version (v);
}
public override string ToString ()
{
StringBuilder sb = new StringBuilder ("StrongName - ");
sb.Append (blob);
if (name != null)
sb.AppendFormat (" name = {0}", name);
if (assemblyVersion != null)
sb.AppendFormat (" version = {0}", assemblyVersion);
return sb.ToString ();
}
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 (StrongNameMembershipCondition), version);
if (blob != null)
se.AddAttribute ("PublicKeyBlob", blob.ToString ());
if (name != null)
se.AddAttribute ("Name", name);
if (assemblyVersion != null) {
string v = assemblyVersion.ToString ();
if (v != "0.0")
se.AddAttribute ("AssemblyVersion", v);
}
return se;
}
}
}
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