text: /*
   * Copyright (C) 2009 Google 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:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * 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.
   *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
   * OWNER 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.
   */
  
  #include "config.h"
  #include "bindings/core/v8/BindingSecurity.h"
  
  #include "bindings/core/v8/V8Binding.h"
  #include "core/dom/Document.h"
  #include "core/frame/LocalDOMWindow.h"
  #include "core/frame/LocalFrame.h"
  #include "core/frame/Settings.h"
  #include "core/html/HTMLFrameElementBase.h"
  #include "platform/weborigin/SecurityOrigin.h"
  
  namespace blink {
  
  static bool isOriginAccessibleFromDOMWindow(SecurityOrigin* targetOrigin, LocalDOMWindow* callingWindow)
  {
      return callingWindow && callingWindow->document()->securityOrigin()->canAccessCheckSuborigins(targetOrigin);
  }
  
  static bool canAccessFrame(v8::Isolate* isolate, SecurityOrigin* targetFrameOrigin, DOMWindow* targetWindow, ExceptionState& exceptionState)
  {
      LocalDOMWindow* callingWindow = callingDOMWindow(isolate);
      if (isOriginAccessibleFromDOMWindow(targetFrameOrigin, callingWindow))
          return true;
  
      if (targetWindow)
          exceptionState.throwSecurityError(targetWindow->sanitizedCrossDomainAccessErrorMessage(callingWindow), targetWindow->crossDomainAccessErrorMessage(callingWindow));
      return false;
  }
  
  static bool canAccessFrame(v8::Isolate* isolate, SecurityOrigin* targetFrameOrigin, DOMWindow* targetWindow, SecurityReportingOption reportingOption = ReportSecurityError)
  {
      LocalDOMWindow* callingWindow = callingDOMWindow(isolate);
      if (isOriginAccessibleFromDOMWindow(targetFrameOrigin, callingWindow))
          return true;
  
      if (reportingOption == ReportSecurityError && targetWindow)
          callingWindow->printErrorMessage(targetWindow->crossDomainAccessErrorMessage(callingWindow));
      return false;
  }
  
  bool BindingSecurity::shouldAllowAccessToFrame(v8::Isolate* isolate, Frame* target, SecurityReportingOption reportingOption)
  {
      if (!target || !target->securityContext())
          return false;
      if (!RuntimeEnabledFeatures::cspCheckEnabled())
          return true;
      return canAccessFrame(isolate, target->securityContext()->securityOrigin(), target->domWindow(), reportingOption);
  }
  
  bool BindingSecurity::shouldAllowAccessToFrame(v8::Isolate* isolate, Frame* target, ExceptionState& exceptionState)
  {
      if (!target || !target->securityContext())
          return false;
      if (!RuntimeEnabledFeatures::cspCheckEnabled())
          return true;
      return canAccessFrame(isolate, target->securityContext()->securityOrigin(), target->domWindow(), exceptionState);
  }
  
  bool BindingSecurity::shouldAllowAccessToNode(v8::Isolate* isolate, Node* target, ExceptionState& exceptionState)
  {
      return target && canAccessFrame(isolate, target->document().securityOrigin(), target->document().domWindow(), exceptionState);
  }
  
  }
  