1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
using System;
using System.Reflection;
using System.Security;
using System.Text;
using CrossDomainPolicyParser;
using System.IO;
using System.Collections.Generic;
using MonoForks.System.Windows.Browser.Net;
internal class Log
{
public delegate void LogDelegate(string msg);
static LogDelegate logger;
static public void SetLog(LogDelegate ld)
{
logger = ld;
}
static public void Msg(string msg)
{
if (logger != null) logger(msg);
}
}
namespace UnityEngine
{
public class UnityCrossDomainHelper
{
public enum SecurityPolicy
{
DontKnowYet = 0,
AllowAccess = 1,
DenyAccess = 2
}
public delegate string GetWebSecurityHostUriDelegate();
private static GetWebSecurityHostUriDelegate getWebSecurityHostUriDelegate = DefaultGetWebSecurityHostUri;
static WWWPolicyProvider wwwPolicyProvider = new WWWPolicyProvider();
static public string GetWebSecurityHostUri()
{
return getWebSecurityHostUriDelegate();
}
static internal void SetWebSecurityHostUriDelegate(GetWebSecurityHostUriDelegate d)
{
getWebSecurityHostUriDelegate = d;
}
static string DefaultGetWebSecurityHostUri()
{
return Application.webSecurityHostUrl;
}
public static void ClearCache()
{
wwwPolicyProvider.ClearCache();
CrossDomainPolicyManager.ClearCache();
}
interface IPolicyProvider
{
Stream GetPolicy(string url);
}
class WWWPolicyProvider : IPolicyProvider
{
Dictionary<string,WWW> policyDownloads = new Dictionary<string, WWW>();
public void ClearCache()
{
policyDownloads.Clear();
}
public Stream GetPolicy(string policyurl)
{
WWW downloadInProgress = null;
policyDownloads.TryGetValue(policyurl, out downloadInProgress);
if (downloadInProgress != null)
{
if (!downloadInProgress.isDone) return null;
bool statuscodeOK = downloadInProgress.error == null;
if (!statuscodeOK) throw new InvalidOperationException("Unable to download policy");
if (statuscodeOK)
{
Log.Msg("Download had OK statuscode");
Log.Msg("Received the following crossdomain.xml");
Log.Msg("----------");
Log.Msg(downloadInProgress.text);
Log.Msg("----------");
return new MemoryStream(downloadInProgress.bytes);
}
}
//okay, we hadn't started downloading the policy, lets start the policy download.
var www = new WWW(policyurl);
policyDownloads.Add(policyurl, www);
return null;
}
}
class WebRequestPolicyProvider : IPolicyProvider
{
private MethodInfo methodinfo;
public WebRequestPolicyProvider(MethodInfo mi)
{
methodinfo = mi;
}
[System.Security.SecuritySafeCritical]
public Stream GetPolicy(string policy_url)
{
var proxy = System.Environment.GetEnvironmentVariable("UNITY_PROXYSERVER");
if (string.IsNullOrEmpty(proxy))
proxy = null;
object result = methodinfo.Invoke(null, new object[] {policy_url, proxy});
return (Stream) result;
}
}
public static SecurityPolicy GetSecurityPolicy(string requesturi_string)
{
return GetSecurityPolicy(requesturi_string, wwwPolicyProvider);
}
public static bool GetSecurityPolicyForDotNetWebRequest(string requesturi_string, MethodInfo policyProvidingMethod)
{
var provider = new WebRequestPolicyProvider(policyProvidingMethod);
return GetSecurityPolicy(requesturi_string, provider) == SecurityPolicy.AllowAccess;
}
static SecurityPolicy GetSecurityPolicy(string requesturi_string, IPolicyProvider policyProvider)
{
var requesturi = UriTools.MakeUri(Application.webSecurityHostUrl, requesturi_string);
if (requesturi.Scheme=="file")
{
//Editor-In-WebMode is allowed to read files from file://
if (Application.isEditor) return SecurityPolicy.AllowAccess;
//Webplayer itself is allowed to read files from file:// as long as it is hosted on file:// itself as well.
var hostedat = new MonoForks.System.Uri(Application.webSecurityHostUrl);
if (Application.isWebPlayer && hostedat.Scheme == "file") return SecurityPolicy.AllowAccess;
//other scenarios of accessing file:// are not allowed
return SecurityPolicy.DenyAccess;
}
//todo: force absolute
ICrossDomainPolicy policy = CrossDomainPolicyManager.GetCachedWebPolicy(requesturi);
if (policy != null)
{
var request = new MonoForks.System.Net.WebRequest(requesturi, new Dictionary<string, string>());
SecurityPolicy allowed = policy.IsAllowed(request) ? SecurityPolicy.AllowAccess : SecurityPolicy.DenyAccess;
return allowed;
}
if (ShouldEnableLogging())
Log.SetLog(Console.WriteLine);
Log.Msg("Determining crossdomain.xml location for request: " + requesturi);
var policyURI = CrossDomainPolicyManager.GetFlashPolicyUri(requesturi);
Stream s;
try
{
s = policyProvider.GetPolicy(policyURI.ToString());
if (s == null) return SecurityPolicy.DontKnowYet;
CrossDomainPolicyManager.BuildFlashPolicy(true, policyURI, s, new Dictionary<string, string>());
} catch (InvalidOperationException)
{
return SecurityPolicy.DenyAccess;
}
catch (MonoForks.Mono.Xml.MiniParser.XMLError xe)
{
Debug.Log (string.Format ("Error reading crossdomain policy: {0}", xe.Message));
return SecurityPolicy.DenyAccess;
}
return GetSecurityPolicy(requesturi_string, policyProvider);
}
[SecuritySafeCritical]
private static bool ShouldEnableLogging()
{
return Environment.GetEnvironmentVariable("ENABLE_CROSSDOMAIN_LOGGING")=="1";
}
static public bool CheckSocketEndPoint(string connecting_to_ip, int port)
{
Log.Msg("CheckSocketEndpoint called for "+connecting_to_ip+" with port: "+port);
if (!Application.webSecurityEnabled) return true;
bool result = CrossDomainPolicyManager.CheckSocketEndPoint(connecting_to_ip,port);
Log.Msg("CheckSocketENdpoint returns :"+result);
return result;
}
static public bool PrefetchSocketPolicy(string ip, int policyport, int timeout)
{
if (!Application.webSecurityEnabled) return false;
var policy = CrossDomainPolicyManager.FlashCrossDomainPolicyFor(ip, policyport, timeout);
return policy != FlashCrossDomainPolicy.DenyPolicy;
}
}
}
|
