1/*
2 * Copyright (C) 2013 Google, Inc. All Rights Reserved.
3 * Copyright (C) 2017 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "XSSAuditorDelegate.h"
29
30#include "Document.h"
31#include "DocumentLoader.h"
32#include "FormData.h"
33#include "Frame.h"
34#include "FrameLoader.h"
35#include "FrameLoaderClient.h"
36#include "HTMLParserIdioms.h"
37#include "NavigationScheduler.h"
38#include "PingLoader.h"
39#include <wtf/JSONValues.h>
40#include <wtf/text/StringBuilder.h>
41#include <wtf/text/CString.h>
42
43
44namespace WebCore {
45using namespace Inspector;
46
47XSSAuditorDelegate::XSSAuditorDelegate(Document& document)
48 : m_document(document)
49{
50 ASSERT(isMainThread());
51}
52
53static inline String buildConsoleError(const XSSInfo& xssInfo)
54{
55 StringBuilder message;
56 message.appendLiteral("The XSS Auditor ");
57 message.append(xssInfo.m_didBlockEntirePage ? "blocked access to" : "refused to execute a script in");
58 message.appendLiteral(" '");
59 message.append(xssInfo.m_originalURL);
60 message.appendLiteral("' because ");
61 message.append(xssInfo.m_didBlockEntirePage ? "the source code of a script" : "its source code");
62 message.appendLiteral(" was found within the request.");
63
64 if (xssInfo.m_didSendXSSProtectionHeader)
65 message.appendLiteral(" The server sent an 'X-XSS-Protection' header requesting this behavior.");
66 else
67 message.appendLiteral(" The auditor was enabled because the server did not send an 'X-XSS-Protection' header.");
68
69 return message.toString();
70}
71
72Ref<FormData> XSSAuditorDelegate::generateViolationReport(const XSSInfo& xssInfo)
73{
74 ASSERT(isMainThread());
75
76 auto& frameLoader = m_document.frame()->loader();
77 String httpBody;
78 if (frameLoader.documentLoader()) {
79 if (auto formData = makeRefPtr(frameLoader.documentLoader()->originalRequest().httpBody()))
80 httpBody = formData->flattenToString();
81 }
82
83 auto reportDetails = JSON::Object::create();
84 reportDetails->setString("request-url", xssInfo.m_originalURL);
85 reportDetails->setString("request-body", httpBody);
86
87 auto reportObject = JSON::Object::create();
88 reportObject->setObject("xss-report", WTFMove(reportDetails));
89
90 return FormData::create(reportObject->toJSONString().utf8().data());
91}
92
93void XSSAuditorDelegate::didBlockScript(const XSSInfo& xssInfo)
94{
95 ASSERT(isMainThread());
96
97 m_document.addConsoleMessage(MessageSource::JS, MessageLevel::Error, buildConsoleError(xssInfo));
98
99 FrameLoader& frameLoader = m_document.frame()->loader();
100 if (xssInfo.m_didBlockEntirePage)
101 frameLoader.stopAllLoaders();
102
103 if (!m_didSendNotifications) {
104 m_didSendNotifications = true;
105
106 frameLoader.client().didDetectXSS(m_document.url(), xssInfo.m_didBlockEntirePage);
107
108 if (!m_reportURL.isEmpty())
109 PingLoader::sendViolationReport(*m_document.frame(), m_reportURL, generateViolationReport(xssInfo), ViolationReportType::XSSAuditor);
110 }
111
112 if (xssInfo.m_didBlockEntirePage)
113 m_document.frame()->navigationScheduler().schedulePageBlock(m_document);
114}
115
116} // namespace WebCore
117