Source/WebCore/page/DOMSecurityPolicy.cpp

   1 /*
   2  * Copyright (C) 2012 Google, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   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.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY GOOGLE 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 COMPUTER, 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.
  24  */
  25
  26 #include "config.h"
  27 #include "DOMSecurityPolicy.h"
  28
  29 #include "ContentSecurityPolicy.h"
  30 #include "ContextDestructionObserver.h"
  31 #include "DOMStringList.h"
  32 #include "Frame.h"
  33 #include "ScriptExecutionContext.h"
  34 #include <wtf/text/TextPosition.h>
  35 #include <wtf/text/WTFString.h>
  36
  37 namespace WebCore {
  38
  39 namespace {
  40
  41 bool isPolicyActiveInContext(ScriptExecutionContext* context)
  42 {
  43     // If the ScriptExecutionContext has been destroyed, there's no active policy.
  44     if (!context)
  45         return false;
  46
  47     return context->contentSecurityPolicy()->isActive();
  48 }
  49
  50 template<bool (ContentSecurityPolicy::*allowWithURL)(const KURL&, ContentSecurityPolicy::ReportingStatus) const>
  51 bool isAllowedWithURL(ScriptExecutionContext* context, const String& url)
  52 {
  53     if (!isPolicyActiveInContext(context))
  54         return true;
  55
  56     KURL parsedURL = context->completeURL(url);
  57     if (!parsedURL.isValid())
  58         return false; // FIXME: Figure out how to throw a JavaScript error.
  59
  60     return (context->contentSecurityPolicy()->*allowWithURL)(parsedURL, ContentSecurityPolicy::SuppressReport);
  61 }
  62
  63 template<bool (ContentSecurityPolicy::*allowWithContext)(const String&, const WTF::OrdinalNumber&, ContentSecurityPolicy::ReportingStatus) const>
  64 bool isAllowed(ScriptExecutionContext* context)
  65 {
  66     if (!isPolicyActiveInContext(context))
  67         return true;
  68
  69     return (context->contentSecurityPolicy()->*allowWithContext)(KURL(), WTF::OrdinalNumber::beforeFirst(), ContentSecurityPolicy::SuppressReport);
  70 }
  71
  72 } // namespace
  73
  74 DOMSecurityPolicy::DOMSecurityPolicy(ScriptExecutionContext* context)
  75     : ContextDestructionObserver(context)
  76 {
  77 }
  78
  79 DOMSecurityPolicy::~DOMSecurityPolicy()
  80 {
  81 }
  82
  83 bool DOMSecurityPolicy::isActive() const
  84 {
  85     return isPolicyActiveInContext(scriptExecutionContext());
  86 }
  87
  88 PassRefPtr<DOMStringList> DOMSecurityPolicy::reportURIs() const
  89 {
  90     RefPtr<DOMStringList> result = DOMStringList::create();
  91
  92     if (isActive())
  93         scriptExecutionContext()->contentSecurityPolicy()->gatherReportURIs(*result.get());
  94
  95     return result.release();
  96 }
  97
  98 bool DOMSecurityPolicy::allowsInlineScript() const
  99 {
 100     return isAllowed<&ContentSecurityPolicy::allowInlineScript>(scriptExecutionContext());
 101 }
 102
 103 bool DOMSecurityPolicy::allowsInlineStyle() const
 104 {
 105     return isAllowed<&ContentSecurityPolicy::allowInlineStyle>(scriptExecutionContext());
 106 }
 107
 108 bool DOMSecurityPolicy::allowsEval() const
 109 {
 110     if (!isActive())
 111         return true;
 112
 113     return scriptExecutionContext()->contentSecurityPolicy()->allowEval(0, ContentSecurityPolicy::SuppressReport);
 114 }
 115
 116
 117 bool DOMSecurityPolicy::allowsConnectionTo(const String& url) const
 118 {
 119     return isAllowedWithURL<&ContentSecurityPolicy::allowConnectToSource>(scriptExecutionContext(), url);
 120 }
 121
 122 bool DOMSecurityPolicy::allowsFontFrom(const String& url) const
 123 {
 124     return isAllowedWithURL<&ContentSecurityPolicy::allowFontFromSource>(scriptExecutionContext(), url);
 125 }
 126
 127 bool DOMSecurityPolicy::allowsFrameFrom(const String& url) const
 128 {
 129     return isAllowedWithURL<&ContentSecurityPolicy::allowChildFrameFromSource>(scriptExecutionContext(), url);
 130 }
 131
 132 bool DOMSecurityPolicy::allowsImageFrom(const String& url) const
 133 {
 134     return isAllowedWithURL<&ContentSecurityPolicy::allowImageFromSource>(scriptExecutionContext(), url);
 135 }
 136
 137 bool DOMSecurityPolicy::allowsMediaFrom(const String& url) const
 138 {
 139     return isAllowedWithURL<&ContentSecurityPolicy::allowMediaFromSource>(scriptExecutionContext(), url);
 140 }
 141
 142 bool DOMSecurityPolicy::allowsObjectFrom(const String& url) const
 143 {
 144     return isAllowedWithURL<&ContentSecurityPolicy::allowObjectFromSource>(scriptExecutionContext(), url);
 145 }
 146
 147 bool DOMSecurityPolicy::allowsScriptFrom(const String& url) const
 148 {
 149     return isAllowedWithURL<&ContentSecurityPolicy::allowScriptFromSource>(scriptExecutionContext(), url);
 150 }
 151
 152 bool DOMSecurityPolicy::allowsStyleFrom(const String& url) const
 153 {
 154     return isAllowedWithURL<&ContentSecurityPolicy::allowStyleFromSource>(scriptExecutionContext(), url);
 155 }
 156
 157 } // namespace WebCore