2 * Copyright (C) 2011 Adam Barth. All Rights Reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "core/html/parser/HTMLToken.h"
30 #include "platform/network/HTTPParsers.h"
31 #include "platform/text/SuffixTree.h"
32 #include "platform/weborigin/KURL.h"
33 #include "wtf/PassOwnPtr.h"
34 #include "wtf/text/TextEncoding.h"
39 class HTMLSourceTracker;
41 class XSSAuditorDelegate;
43 struct FilterTokenRequest {
44 FilterTokenRequest(HTMLToken& token, HTMLSourceTracker& sourceTracker, bool shouldAllowCDATA)
46 , sourceTracker(sourceTracker)
47 , shouldAllowCDATA(shouldAllowCDATA)
51 HTMLSourceTracker& sourceTracker;
52 bool shouldAllowCDATA;
56 WTF_MAKE_NONCOPYABLE(XSSAuditor);
60 void init(Document*, XSSAuditorDelegate*);
61 void initForFragment();
63 PassOwnPtr<XSSInfo> filterToken(const FilterTokenRequest&);
64 bool isSafeToSendToAnotherThread() const;
66 void setEncoding(const WTF::TextEncoding&);
69 static const size_t kMaximumFragmentLengthTarget = 100;
74 PermittingAdjacentCharacterTokens,
75 SuppressingAdjacentCharacterTokens
80 NormalAttributeTruncation,
81 SrcLikeAttributeTruncation,
82 ScriptLikeAttributeTruncation
85 enum HrefRestriction {
86 ProhibitSameOriginHref,
90 bool filterStartToken(const FilterTokenRequest&);
91 void filterEndToken(const FilterTokenRequest&);
92 bool filterCharacterToken(const FilterTokenRequest&);
93 bool filterScriptToken(const FilterTokenRequest&);
94 bool filterObjectToken(const FilterTokenRequest&);
95 bool filterParamToken(const FilterTokenRequest&);
96 bool filterEmbedToken(const FilterTokenRequest&);
97 bool filterAppletToken(const FilterTokenRequest&);
98 bool filterFrameToken(const FilterTokenRequest&);
99 bool filterMetaToken(const FilterTokenRequest&);
100 bool filterBaseToken(const FilterTokenRequest&);
101 bool filterFormToken(const FilterTokenRequest&);
102 bool filterInputToken(const FilterTokenRequest&);
103 bool filterButtonToken(const FilterTokenRequest&);
104 bool filterLinkToken(const FilterTokenRequest&);
106 bool eraseDangerousAttributesIfInjected(const FilterTokenRequest&);
107 bool eraseAttributeIfInjected(const FilterTokenRequest&, const QualifiedName&, const String& replacementValue = String(), TruncationKind = NormalAttributeTruncation, HrefRestriction = ProhibitSameOriginHref);
109 String canonicalizedSnippetForTagName(const FilterTokenRequest&);
110 String canonicalizedSnippetForJavaScript(const FilterTokenRequest&);
111 String nameFromAttribute(const FilterTokenRequest&, const HTMLToken::Attribute&);
112 String snippetFromAttribute(const FilterTokenRequest&, const HTMLToken::Attribute&);
113 String canonicalize(String, TruncationKind);
115 bool isContainedInRequest(const String&);
116 bool isLikelySafeResource(const String& url);
121 ReflectedXSSDisposition m_xssProtection;
122 bool m_didSendValidCSPHeader;
123 bool m_didSendValidXSSProtectionHeader;
126 String m_decodedHTTPBody;
127 String m_httpBodyAsString;
128 OwnPtr<SuffixTree<ASCIICodebook>> m_decodedHTTPBodySuffixTree;
131 bool m_scriptTagFoundInRequest;
132 unsigned m_scriptTagNestingLevel;
133 WTF::TextEncoding m_encoding;