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//
// CrossDomainPolicyManager.cs
//
// Authors:
// Atsushi Enomoto <atsushi@ximian.com>
// Moonlight List (moonlight-list@lists.ximian.com)
//
// Copyright (C) 2009 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.
//
#define NET_2_1
#if NET_2_1
using System;
using System.Collections.Generic;
using System.IO;
using MonoForks.System.Windows.Interop;
using System.Security;
using System.Reflection;
namespace MonoForks.System.Windows.Browser.Net
{
internal static class CrossDomainPolicyManager
{
public static string GetRoot(Uri uri)
{
if ((uri.Scheme == "http" && uri.Port == 80) || (uri.Scheme == "https" && uri.Port == 443) || (uri.Port == -1))
return String.Format("{0}://{1}/", uri.Scheme, uri.DnsSafeHost);
else
return String.Format("{0}://{1}:{2}/", uri.Scheme, uri.DnsSafeHost, uri.Port);
}
public const string ClientAccessPolicyFile = "/clientaccesspolicy.xml";
public const string CrossDomainFile = "/crossdomain.xml";
const int Timeout = 10000;
// Web Access Policy
static Dictionary<string, ICrossDomainPolicy> policies = new Dictionary<string, ICrossDomainPolicy>();
static internal ICrossDomainPolicy PolicyDownloadPolicy = new PolicyDownloadPolicy();
static ICrossDomainPolicy site_of_origin_policy = new SiteOfOriginPolicy();
static ICrossDomainPolicy no_access_policy = new NoAccessPolicy();
static Uri GetRootUri(Uri uri)
{
return new Uri(GetRoot(uri));
}
public static Uri GetSilverlightPolicyUri(Uri uri)
{
return new Uri(GetRootUri(uri), CrossDomainPolicyManager.ClientAccessPolicyFile);
}
public static Uri GetFlashPolicyUri(Uri uri)
{
return new Uri(GetRootUri(uri), CrossDomainPolicyManager.CrossDomainFile);
}
public static ICrossDomainPolicy GetCachedWebPolicy(Uri uri)
{
//Debug.Log("Got to GetCachedWebPolicy");
//Debug.Log("debug1. uri: " + uri.ToString() + " pluginhost.sourceuri: " + PluginHost.SourceUri);
//Debug.Log("debug1.1 pluginhost.rooturi: " + PluginHost.RootUri);
// if we request an Uri from the same site then we return an "always positive" policy
if (SiteOfOriginPolicy.HasSameOrigin(uri, PluginHost.SourceUri))
return site_of_origin_policy;
//Debug.Log("debug2");
//if this is a request for a crossdomainfile, then we allow it.
//TODO: Make this more secure.
string postfix = "";
if (!uri.IsDefaultPort) postfix = ":" + uri.Port;
if (uri.ToString() == uri.Scheme + "://" + uri.Host + postfix + "/crossdomain.xml") return PolicyDownloadPolicy;
//Debug.Log("debug3");
// otherwise we search for an already downloaded policy for the web site
string root = GetRoot(uri);
ICrossDomainPolicy policy = null;
policies.TryGetValue(root, out policy);
// and we return it (if we have it) or null (if we dont)
//Debug.Log("debug4: " + policy);
return policy;
}
private static void AddPolicy(Uri responseUri, ICrossDomainPolicy policy)
{
string root = GetRoot(responseUri);
try
{
policies.Add(root, policy);
}
catch (ArgumentException)
{
// it's possible another request already added this root
}
}
/*
public static ICrossDomainPolicy BuildSilverlightPolicy (HttpWebResponse response)
{
// return null if no Silverlight policy was found, since we offer a second chance with a flash policy
if (response.StatusCode != HttpStatusCode.OK)
return null;
ICrossDomainPolicy policy = null;
try {
policy = ClientAccessPolicy.FromStream (response.GetResponseStream ());
if (policy != null)
policies.Add (GetRoot (response.ResponseUri), policy);
} catch (Exception ex) {
Console.WriteLine (String.Format ("CrossDomainAccessManager caught an exception while reading {0}: {1}",
response.ResponseUri, ex.Message));
// and ignore.
}
return policy;
}
public static ICrossDomainPolicy BuildFlashPolicy (HttpWebResponse response)
{
bool ok = response.StatusCode == HttpStatusCode.OK;
return BuildFlashPolicy(ok, response.ResponseUri, response.GetResponseStream(), response.Headers);
}
*/
public static ICrossDomainPolicy BuildFlashPolicy(bool statuscodeOK, Uri uri, Stream responsestream, Dictionary<string, string> responseheaders)
{
ICrossDomainPolicy policy = null;
if (statuscodeOK)
{
try
{
policy = FlashCrossDomainPolicy.FromStream(responsestream);
}
catch (Exception ex)
{
Log.Msg(String.Format("BuildFlashPolicy caught an exception while parsing {0}: {1}",
uri, ex.Message));
throw;
}
if (policy != null)
{
// see DRT# 864 and 865
Log.Msg("crossdomain.xml was succesfully parsed");
string site_control = null;
responseheaders.TryGetValue("X-Permitted-Cross-Domain-Policies", out site_control);
if (!String.IsNullOrEmpty(site_control))
(policy as FlashCrossDomainPolicy).SiteControl = site_control;
}
}
// the flash policy was the last chance, keep a NoAccess into the cache
if (policy == null)
policy = no_access_policy;
AddPolicy(uri, policy);
return policy;
}
public static void ClearCache()
{
policies.Clear();
}
// Socket Policy
//
// - we connect once to a site for the entire application life time
// - this returns us a policy file (silverlight format only) or else no access is granted
// - this policy file
// - can contain multiple policies
// - can apply to multiple domains
// - can grant access to several resources
static readonly Dictionary<string, FlashCrossDomainPolicy> SocketPoliciesByIp = new Dictionary<string, FlashCrossDomainPolicy>();
const int PolicyPort = 843;
static public bool CheckSocketEndPoint(string connecting_to_ip, int port)
{
return CheckSocketEndPoint(connecting_to_ip,port,PolicyPort);
}
static public bool CheckSocketEndPoint(string connecting_to_ip, int port, int policyport)
{
var policy = FlashCrossDomainPolicyFor(connecting_to_ip, policyport, 3000);
return policy.IsSocketConnectionAllowed(port);
}
public static FlashCrossDomainPolicy FlashCrossDomainPolicyFor(string connecting_to_ip, int policyport, int timeout)
{
FlashCrossDomainPolicy cachedPolicy;
if (SocketPoliciesByIp.TryGetValue(connecting_to_ip, out cachedPolicy))
{
Log.Msg(String.Format("Policy for host {0} found in the cache.", connecting_to_ip));
return cachedPolicy;
}
try
{
FlashCrossDomainPolicy policy = RetrieveFlashCrossDomainPolicyFrom(connecting_to_ip, policyport,timeout);
policy.PolicyPort = policyport;
SocketPoliciesByIp.Add(connecting_to_ip, policy);
return policy;
}
catch (Exception ex)
{
Log.Msg(String.Format("{0} caught an exception while checking endpoint {1}: {2}", typeof(CrossDomainPolicyManager).Name, connecting_to_ip, ex));
return FlashCrossDomainPolicy.DenyPolicy;
}
}
[SecuritySafeCritical]
private static FlashCrossDomainPolicy RetrieveFlashCrossDomainPolicyFrom(string host, int port, int timeout)
{
var type = Type.GetType("System.Net.Sockets.SocketPolicyClient, System");
var stream = (Stream)type.InvokeMember("GetPolicyStreamForIP", BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.NonPublic, null, null, new object[] { host, port, timeout });
if (stream == null) throw new Exception("got back null stream from getpolicystream");
return FlashCrossDomainPolicy.FromStream(stream);
}
}
}
#endif
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