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//
// System.Security.Policy.UrlMembershipCondition.cs
//
// Authors:
// Duncan Mak (duncan@ximian.com)
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2003, Ximian Inc.
// (C) 2004 Motus Technologies Inc. (http://www.motus.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.Globalization;
using System.Runtime.InteropServices;
using Mono.Security;
namespace System.Security.Policy {
[Serializable]
[ComVisible (true)]
public sealed class UrlMembershipCondition : IMembershipCondition, IConstantMembershipCondition {
private readonly int version = 1;
private Url url;
private string userUrl;
public UrlMembershipCondition (string url)
{
if (url == null)
throw new ArgumentNullException ("url");
CheckUrl (url);
userUrl = url;
this.url = new Url (url);
}
internal UrlMembershipCondition (Url url, string userUrl)
{
// as the Url object has already been validated there's no
// need to restart the whole process by converting to string
this.url = (Url) url.Copy ();
this.userUrl = userUrl;
}
// properties
public string Url {
get {
if (userUrl == null)
userUrl = url.Value;
return userUrl;
}
set { url = new Url (value); }
}
// methods
public bool Check (Evidence evidence)
{
if (evidence == null)
return false;
string u = url.Value;
int wildcard = u.LastIndexOf ("*"); // partial match with a wildcard at the end
if (wildcard == -1)
wildcard = u.Length; // exact match
IEnumerator e = evidence.GetHostEnumerator ();
while (e.MoveNext ()) {
if (e.Current is Url) {
// note: there shouldn't be more than one Url evidence
if (String.Compare (u, 0, (e.Current as Url).Value, 0, wildcard,
true, CultureInfo.InvariantCulture) == 0) {
return true;
}
// but we must check for all of them!
}
}
return false;
}
public IMembershipCondition Copy ()
{
return new UrlMembershipCondition (url, userUrl);
}
public override bool Equals (object o)
{
UrlMembershipCondition umc = (o as UrlMembershipCondition);
if (o == null)
return false;
string u = url.Value;
int length = u.Length; // exact match
// partial match with a wildcard at the end
if (u [length - 1] == '*') {
length--;
// in this case the last / could be ommited
if (u [length - 1] == '/')
length--;
}
return (String.Compare (u, 0, umc.Url, 0, length, true, CultureInfo.InvariantCulture) == 0);
}
public void FromXml (SecurityElement e)
{
FromXml (e, null);
}
public void FromXml (SecurityElement e, PolicyLevel level)
{
MembershipConditionHelper.CheckSecurityElement (e, "e", version, version);
string u = e.Attribute ("Url");
if (u != null) {
CheckUrl (u);
url = new Url (u);
} else {
url = null;
}
userUrl = u;
}
public override int GetHashCode ()
{
return url.GetHashCode ();
}
public override string ToString ()
{
return "Url - " + Url;
}
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 (UrlMembershipCondition), version);
se.AddAttribute ("Url", userUrl);
return se;
}
// internal stuff
internal void CheckUrl (string url)
{
// In .NET 1.x Url class checked the validity of the
// URL but that's no more the case in 2.x - but we
// still need the check done here
int protocolPos = url.IndexOf (Uri.SchemeDelimiter);
string u = (protocolPos < 0) ? "file://" + url : url;
Uri uri = new Uri (u, false, false);
// no * except for the "lone star" case
if (uri.Host.IndexOf ('*') >= 1) {
string msg = Locale.GetText ("Invalid * character in url");
throw new ArgumentException (msg, "name");
}
}
}
}
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