Source/bindings/core/v8/BindingSecurity.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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#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;
    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;
    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);
}

}