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/*
* Copyright (C) 2011 Adam Barth. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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.
*/
#ifndef XSSAuditor_h
#define XSSAuditor_h
#include "HTMLToken.h"
#include "HTTPParsers.h"
#include "SuffixTree.h"
namespace WebCore {
class HTMLDocumentParser;
class XSSAuditor {
WTF_MAKE_NONCOPYABLE(XSSAuditor);
public:
explicit XSSAuditor(HTMLDocumentParser*);
void filterToken(HTMLToken&);
private:
static const size_t kMaximumFragmentLengthTarget = 100;
enum State {
Uninitialized,
Initialized
};
enum AttributeKind {
NormalAttribute,
SrcLikeAttribute
};
void init();
bool filterStartToken(HTMLToken&);
void filterEndToken(HTMLToken&);
bool filterCharacterToken(HTMLToken&);
bool filterScriptToken(HTMLToken&);
bool filterObjectToken(HTMLToken&);
bool filterParamToken(HTMLToken&);
bool filterEmbedToken(HTMLToken&);
bool filterAppletToken(HTMLToken&);
bool filterIframeToken(HTMLToken&);
bool filterMetaToken(HTMLToken&);
bool filterBaseToken(HTMLToken&);
bool filterFormToken(HTMLToken&);
bool eraseDangerousAttributesIfInjected(HTMLToken&);
bool eraseAttributeIfInjected(HTMLToken&, const QualifiedName&, const String& replacementValue = String(), AttributeKind treatment = NormalAttribute);
String snippetForRange(const HTMLToken&, int start, int end);
String snippetForJavaScript(const String&);
String decodedSnippetForAttribute(const HTMLToken&, const HTMLToken::Attribute&, AttributeKind treatment = NormalAttribute);
bool isContainedInRequest(const String&);
bool isSameOriginResource(const String& url);
HTMLDocumentParser* m_parser;
bool m_isEnabled;
XSSProtectionDisposition m_xssProtection;
String m_decodedURL;
String m_decodedHTTPBody;
OwnPtr<SuffixTree<ASCIICodebook> > m_decodedHTTPBodySuffixTree;
State m_state;
String m_cachedSnippet;
bool m_shouldAllowCDATA;
unsigned m_scriptTagNestingLevel;
bool m_notifiedClient;
};
}
#endif
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