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//
// System.Xml.XmlSecureResolver.cs
//
// Author: Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
//
// (C) 2003 Atsushi Enomoto
// Copyright (C) 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.Net;
using System.Security;
using System.Security.Policy;
using System.Security.Permissions;
#if NET_4_5
using System.Threading.Tasks;
#endif
namespace System.Xml
{
public class XmlSecureResolver : XmlResolver
{
#region Static Members
public static Evidence CreateEvidenceForUrl (string securityUrl)
{
Evidence e = new Evidence ();
if ((securityUrl != null) && (securityUrl.Length > 0)) {
try {
Url url = new Url (securityUrl);
e.AddHost (url);
} catch (ArgumentException) {
}
try {
Zone zone = Zone.CreateFromUrl (securityUrl);
e.AddHost (zone);
} catch (ArgumentException) {
}
try {
Site site = Site.CreateFromUrl (securityUrl);
e.AddHost (site);
} catch (ArgumentException) {
}
}
return e;
}
#endregion
XmlResolver resolver;
PermissionSet permissionSet;
#region .ctor and Finalizer
public XmlSecureResolver (
XmlResolver resolver, Evidence evidence)
{
this.resolver = resolver;
if (SecurityManager.SecurityEnabled) {
this.permissionSet = SecurityManager.ResolvePolicy (evidence);
}
}
public XmlSecureResolver (
XmlResolver resolver, PermissionSet permissionSet)
{
this.resolver = resolver;
this.permissionSet = permissionSet;
}
public XmlSecureResolver (
XmlResolver resolver, string securityUrl)
{
this.resolver = resolver;
if (SecurityManager.SecurityEnabled) {
this.permissionSet = SecurityManager.ResolvePolicy (CreateEvidenceForUrl (securityUrl));
}
}
#endregion
#region Property
#if !NET_2_1
public override ICredentials Credentials {
set { resolver.Credentials = value; }
}
#endif
#endregion
#region Methods
[MonoTODO]
// FIXME: imperative PermitOnly isn't supported
public override object GetEntity (
Uri absoluteUri, string role, Type ofObjectToReturn)
{
if (SecurityManager.SecurityEnabled) {
// in case the security manager was switched after the constructor was called
if (permissionSet == null) {
throw new SecurityException (Locale.GetText (
"Security Manager wasn't active when instance was created."));
}
permissionSet.PermitOnly ();
}
return resolver.GetEntity (absoluteUri, role, ofObjectToReturn);
}
public override Uri ResolveUri (Uri baseUri, string relativeUri)
{
return resolver.ResolveUri (baseUri, relativeUri);
}
#if NET_4_5
public override Task<object> GetEntityAsync (
Uri absoluteUri, string role, Type ofObjectToReturn)
{
if (SecurityManager.SecurityEnabled) {
// in case the security manager was switched after the constructor was called
if (permissionSet == null) {
throw new SecurityException (Locale.GetText (
"Security Manager wasn't active when instance was created."));
}
permissionSet.PermitOnly ();
}
return resolver.GetEntityAsync (absoluteUri, role, ofObjectToReturn);
}
#endif
#endregion
}
}
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