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
|
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
namespace UnityEngine
{
#if ENABLE_WWW
partial class WWW
{
#if UNITY_WEBPLAYER || UNITY_EDITOR
static readonly char[] forbiddenCharacters = {
(char)0, (char)1, (char)2, (char)3, (char)4, (char)5,
(char)6, (char)7, (char)8, (char)9, (char)10,
(char)11, (char)12, (char)13, (char)14, (char)15,
(char)16, (char)17, (char)18, (char)19, (char)20,
(char)21, (char)22, (char)23, (char)24, (char)25,
(char)26, (char)27, (char)28, (char)29, (char)30,
(char)31, (char)127
};
// From http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader()-method
static readonly string[] forbiddenHeaderKeys =
{
"Accept-Charset",
"Accept-Encoding",
"Access-Control-Request-Headers",
"Access-Control-Request-Method",
"Connection",
"Content-Length",
"Cookie",
"Cookie2",
"Date",
"DNT",
"Expect",
"Host",
"Keep-Alive",
"Origin",
"Referer",
"TE",
"Trailer",
"Transfer-Encoding",
"Upgrade",
"User-Agent",
"Via",
"X-Unity-Version",
};
// Ensure headers do not contain invalid characters (ASCII 0-31, 127)
// This prevents XSS and header-spoofing vulnerabilities.
private static void CheckSecurityOnHeaders(string[] headers)
{
bool failNoisy = Application.GetBuildUnityVersion() >= Application.GetNumericUnityVersion("4.3.0b1");
// On non-webplayer platforms, we permit the platform itself to define the restrictions.
for(int i = 0; i < headers.Length; i+=2)
{
// headers[i] is the header name
// headers[i+1] is the header body
foreach(string forbiddenHeaderKey in forbiddenHeaderKeys)
{
if(string.Equals(headers[i], forbiddenHeaderKey, StringComparison.CurrentCultureIgnoreCase))
{
if(failNoisy)
{
throw new ArgumentException("Cannot overwrite header: " + headers[i]);
}
else
{
Debug.LogError("Illegal header overwrite, this will fail in 4.3 and above: " + headers[i]);
}
}
}
if(headers[i].StartsWith("Sec-") || headers[i].StartsWith("Proxy-"))
{
if(failNoisy)
{
throw new ArgumentException("Cannot overwrite header: " + headers[i]);
}
else
{
Debug.LogError("Illegal header overwrite, this will fail in 4.3 and above: " + headers[i]);
}
}
if(headers[i].IndexOfAny(forbiddenCharacters) > -1 ||
headers[i+1].IndexOfAny(forbiddenCharacters) > -1)
{
if(failNoisy)
{
throw new ArgumentException("Cannot include control characters " +
"in a HTTP header, either as key or value.");
}
else
{
Debug.LogError("Illegal control characters in header, this will fail in 4.3 and above");
}
}
}
}
#endif
#if !UNITY_METRO_API && !UNITY_WP8_API
private static string[] FlattenedHeadersFrom(Hashtable headers)
{
if (headers == null) return null;
var flattenedHeaders = new string[headers.Count * 2];
var i = 0;
foreach (DictionaryEntry entry in headers)
{
flattenedHeaders[i++] = entry.Key.ToString();
flattenedHeaders[i++] = entry.Value.ToString();
}
return flattenedHeaders;
}
#else
private static string[] FlattenedHeadersFrom(Dictionary<string, string> headers)
{
if (headers == null) return null;
var flattenedHeaders = new string[headers.Count * 2];
var i = 0;
foreach (KeyValuePair<string, string> entry in headers)
{
flattenedHeaders[i++] = entry.Key.ToString();
flattenedHeaders[i++] = entry.Value.ToString();
}
return flattenedHeaders;
}
#endif
#if ENABLE_GENERICS && !UNITY_WEBGL
internal static Dictionary<string, string> ParseHTTPHeaderString(string input)
{
if (input == null) throw new ArgumentException("input was null to ParseHTTPHeaderString");
var result = new Dictionary<string, string>();
var reader = new StringReader(input);
int count = 0;
while (true)
{
var line = reader.ReadLine();
if (line == null) break;
// The first line in the response header is the HTTP status line, according to the
// HTTP 1.1 specification (http://tools.ietf.org/html/rfc2616#section-6). Lets save it.
if (count++ == 0 && line.StartsWith("HTTP"))
{
result["STATUS"] = line;
continue;
}
var index = line.IndexOf(": ");
if (index == -1) continue;
var key = line.Substring(0, index).ToUpper();
var value = line.Substring(index + 2);
result[key] = value;
}
return result;
}
#endif
}
#endif
}
|
