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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*
* Copyright (C) 2007 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "SecurityOrigin.h"
#include "Document.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameTree.h"
#include "KURL.h"
#include "PlatformString.h"
namespace WebCore {
static bool isDefaultPortForProtocol(unsigned short port, String protocol)
{
if (protocol.isEmpty())
return false;
static HashMap<String, unsigned> defaultPorts;
if (defaultPorts.isEmpty()) {
defaultPorts.set("http", 80);
defaultPorts.set("https", 443);
defaultPorts.set("ftp", 21);
defaultPorts.set("ftps", 990);
}
return defaultPorts.get(protocol) == port;
}
SecurityOrigin::SecurityOrigin(const String& protocol, const String& host, unsigned short port)
: m_protocol(protocol.isNull() ? "" : protocol.lower())
, m_host(host.isNull() ? "" : host.lower())
, m_port(port)
, m_portSet(port)
, m_noAccess(false)
, m_domainWasSetInDOM(false)
{
// These protocols do not create security origins; the owner frame provides the origin
if (m_protocol == "about" || m_protocol == "javascript")
m_protocol = "";
// data: URLs are not allowed access to anything other than themselves.
if (m_protocol == "data")
m_noAccess = true;
if (isDefaultPortForProtocol(m_port, m_protocol)) {
m_port = 0;
m_portSet = false;
}
}
bool SecurityOrigin::isEmpty() const
{
return m_protocol.isEmpty();
}
PassRefPtr<SecurityOrigin> SecurityOrigin::create(const String& protocol, const String& host, unsigned short port, SecurityOrigin* ownerFrameOrigin)
{
RefPtr<SecurityOrigin> origin = new SecurityOrigin(protocol, host, port);
// If we do not obtain a meaningful origin from the URL, then we try to find one
// via the frame hierarchy.
// We alias the SecurityOrigins to match Firefox, see Bug 15313
// http://bugs.webkit.org/show_bug.cgi?id=15313
if (origin->isEmpty() && ownerFrameOrigin)
return ownerFrameOrigin;
return origin.release();
}
PassRefPtr<SecurityOrigin> SecurityOrigin::createForFrame(Frame* frame)
{
if (!frame)
return create("", "", 0, 0);
FrameLoader* loader = frame->loader();
KURL url = loader->url();
Frame* ownerFrame = frame->tree()->parent();
if (!ownerFrame)
ownerFrame = loader->opener();
SecurityOrigin* ownerFrameOrigin = 0;
if (ownerFrame && ownerFrame->document())
ownerFrameOrigin = ownerFrame->document()->securityOrigin();
return create(url.protocol(), url.host(), url.port(), ownerFrameOrigin);
}
PassRefPtr<SecurityOrigin> SecurityOrigin::copy()
{
return create(m_protocol.copy(), m_host.copy(), m_port, 0);
}
void SecurityOrigin::setDomainFromDOM(const String& newDomain)
{
m_domainWasSetInDOM = true;
m_host = newDomain.lower();
}
bool SecurityOrigin::canAccess(const SecurityOrigin* other, Reason& reason) const
{
if (m_noAccess || other->m_noAccess) {
reason = SecurityOrigin::GenericMismatch;
return false;
}
// Here are three cases where we should permit access:
//
// 1) Neither document has set document.domain. In this case, we insist
// that the scheme, host, and port of the URLs match.
//
// 2) Both documents have set document.domain. In this case, we insist
// that the documents have set document.domain to the same value and
// that the scheme of the URLs match.
//
// 3) As a special case if only one of the documents has set document.domain but
// there is a host and port match we deny access but signal this to the client.
// In this case Window::allowsAccessFrom() will recheck against the lexical global
// object and allow access if that check passes.
//
// This matches the behavior of Firefox 2 and Internet Explorer 6.
//
// Internet Explorer 7 and Opera 9 are more strict in that they require
// the port numbers to match when both pages have document.domain set.
//
// FIXME: Evaluate whether we can tighten this policy to require matched
// port numbers.
//
// Opera 9 allows access when only one page has set document.domain, but
// this is a security vulnerability.
if (m_protocol == other->m_protocol) {
if (!m_domainWasSetInDOM && !other->m_domainWasSetInDOM) {
if (m_host == other->m_host && m_port == other->m_port)
return true;
} else if (m_domainWasSetInDOM && other->m_domainWasSetInDOM) {
if (m_host == other->m_host)
return true;
} else {
if (m_host == other->m_host && m_port == other->m_port) {
reason = DomainSetInDOMMismatch;
return false;
}
}
}
reason = SecurityOrigin::GenericMismatch;
return false;
}
bool SecurityOrigin::isSecureTransitionTo(const KURL& url) const
{
// New window created by the application
if (isEmpty())
return true;
if (FrameLoader::shouldTreatSchemeAsLocal(m_protocol))
return true;
return equalIgnoringCase(m_host, String(url.host())) && equalIgnoringCase(m_protocol, String(url.protocol())) && m_port == url.port();
}
String SecurityOrigin::toString() const
{
return m_protocol + ":" + m_host + ":" + String::number(m_port);
}
static const char SeparatorCharacter = '_';
PassRefPtr<SecurityOrigin> SecurityOrigin::createFromIdentifier(const String& stringIdentifier)
{
// Make sure there's a first separator
int separator1 = stringIdentifier.find(SeparatorCharacter);
if (separator1 == -1)
return create("", "", 0, 0);
// Make sure there's a second separator
int separator2 = stringIdentifier.find(SeparatorCharacter, separator1 + 1);
if (separator2 == -1)
return create("", "", 0, 0);
// Make sure there's not a third separator
if (stringIdentifier.reverseFind(SeparatorCharacter) != separator2)
return create("", "", 0, 0);
// Make sure the port section is a valid port number or doesn't exist
bool portOkay;
int port = stringIdentifier.right(stringIdentifier.length() - separator2 - 1).toInt(&portOkay);
if (!portOkay && separator2 + 1 == static_cast<int>(stringIdentifier.length()))
return create("", "", 0, 0);
if (port < 0 || port > 65535)
return create("", "", 0, 0);
// Split out the 3 sections of data
String protocol = stringIdentifier.substring(0, separator1);
String host = stringIdentifier.substring(separator1 + 1, separator2 - separator1 - 1);
return create(protocol, host, port, 0);
}
String SecurityOrigin::stringIdentifier() const
{
static String separatorString = String(&SeparatorCharacter, 1);
return m_protocol + separatorString + m_host + separatorString + String::number(m_port);
}
String SecurityOrigin::securityToken() const
{
if (isEmpty())
return String();
if (m_noAccess)
return String();
if (m_domainWasSetInDOM) {
// We could encode the document.domain state into the security token,
// but this is an uncommon case and leads to complexity. We're better
// off sending these accesses down the slow path.
return String();
}
return toString();
}
} // namespace WebCore
|