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/*
* Copyright (C) 2024 Apple 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:
* 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. AND ITS 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 APPLE INC. OR ITS 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 "ScriptTrackingPrivacyFilter.h"
#include <WebCore/RegistrableDomain.h>
#include <WebCore/SecurityOrigin.h>
namespace WebKit {
static void initializeFilterRules(Vector<ScriptTrackingPrivacyHost>&& source, HostToAllowedCategoriesMap& target, WebCore::ScriptTrackingPrivacyFlags& categoriesWithAllowedHosts)
{
target.reserveInitialCapacity(source.size());
for (auto&& [host, allowedCategories] : WTFMove(source)) {
if (host.isEmpty()) {
ASSERT_NOT_REACHED();
continue;
}
categoriesWithAllowedHosts.add(allowedCategories);
target.add(WTFMove(host), WTFMove(allowedCategories));
}
}
ScriptTrackingPrivacyFilter::ScriptTrackingPrivacyFilter(ScriptTrackingPrivacyRules&& rules)
{
initializeFilterRules(WTFMove(rules.thirdPartyHosts), m_thirdPartyHosts, m_categoriesWithAllowedHosts);
initializeFilterRules(WTFMove(rules.thirdPartyTopDomains), m_thirdPartyTopDomains, m_categoriesWithAllowedHosts);
initializeFilterRules(WTFMove(rules.firstPartyHosts), m_firstPartyHosts, m_categoriesWithAllowedHosts);
initializeFilterRules(WTFMove(rules.firstPartyTopDomains), m_firstPartyTopDomains, m_categoriesWithAllowedHosts);
}
auto ScriptTrackingPrivacyFilter::lookup(const URL& url, const WebCore::SecurityOrigin& topOrigin) -> LookupResult
{
WebCore::RegistrableDomain scriptTopDomain { url };
auto scriptTopDomainName = scriptTopDomain.string();
if (scriptTopDomainName.isEmpty())
return { };
auto hostName = url.host().toStringWithoutCopying();
if (hostName.isEmpty())
return { };
if (!scriptTopDomain.matches(topOrigin.data())) {
if (auto entry = m_thirdPartyHosts.getOptional(hostName))
return { true, *entry };
if (auto entry = m_thirdPartyTopDomains.getOptional(scriptTopDomainName))
return { true, *entry };
}
if (auto entry = m_firstPartyHosts.getOptional(hostName)) [[unlikely]]
return { true, *entry };
if (auto entry = m_firstPartyTopDomains.getOptional(scriptTopDomainName)) [[unlikely]]
return { true, *entry };
return { };
}
bool ScriptTrackingPrivacyFilter::matches(const URL& url, const WebCore::SecurityOrigin& topOrigin)
{
return lookup(url, topOrigin).foundMatch;
}
bool ScriptTrackingPrivacyFilter::shouldAllowAccess(const URL& url, const WebCore::SecurityOrigin& topOrigin, WebCore::ScriptTrackingPrivacyCategory category)
{
if (url.isEmpty())
return false;
auto categoryFlag = WebCore::scriptCategoryAsFlag(category);
if (!m_categoriesWithAllowedHosts.contains(categoryFlag))
return false;
return lookup(url, topOrigin).allowedCategories.contains(categoryFlag);
}
} // namespace WebKit
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