Source/bindings/v8/BindingSecurity.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "config.h"
#include "bindings/v8/BindingSecurity.h"

#include "bindings/v8/V8Binding.h"
#include "core/dom/Document.h"
#include "core/html/HTMLFrameElementBase.h"
#include "core/page/DOMWindow.h"
#include "core/page/Frame.h"
#include "core/page/Settings.h"
#include "weborigin/SecurityOrigin.h"

namespace WebCore {

static bool isDocumentAccessibleFromDOMWindow(Document* targetDocument, DOMWindow* activeWindow)
{
    if (!targetDocument)
        return false;

    if (!activeWindow)
        return false;

    if (activeWindow->document()->securityOrigin()->canAccess(targetDocument->securityOrigin()))
        return true;

    return false;
}

static bool canAccessDocument(Document* targetDocument, ExceptionState& es)
{
    DOMWindow* activeWindow = activeDOMWindow();
    if (isDocumentAccessibleFromDOMWindow(targetDocument, activeWindow))
        return true;

    es.throwSecurityError(targetDocument->domWindow()->sanitizedCrossDomainAccessErrorMessage(activeWindow), targetDocument->domWindow()->crossDomainAccessErrorMessage(activeWindow));
    return false;
}

static bool canAccessDocument(Document* targetDocument, SecurityReportingOption reportingOption = ReportSecurityError)
{
    DOMWindow* activeWindow = activeDOMWindow();
    if (isDocumentAccessibleFromDOMWindow(targetDocument, activeWindow))
        return true;

    if (reportingOption == ReportSecurityError) {
        if (Frame* frame = targetDocument->frame())
            frame->domWindow()->printErrorMessage(targetDocument->domWindow()->crossDomainAccessErrorMessage(activeWindow));
    }

    return false;
}

bool BindingSecurity::shouldAllowAccessToFrame(Frame* target, SecurityReportingOption reportingOption)
{
    return target && canAccessDocument(target->document(), reportingOption);
}

bool BindingSecurity::shouldAllowAccessToFrame(Frame* target, ExceptionState& es)
{
    return target && canAccessDocument(target->document(), es);
}

bool BindingSecurity::shouldAllowAccessToNode(Node* target)
{
    return target && canAccessDocument(target->document());
}

}