gecko-dev/netwerk/url-classifier/UrlClassifierFeatureTrackin...

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "UrlClassifierFeatureTrackingProtection.h"
#include "mozilla/AntiTrackingCommon.h"
#include "mozilla/net/UrlClassifierCommon.h"
#include "nsContentUtils.h"
#include "nsIHttpChannelInternal.h"
#include "nsILoadContext.h"
#include "nsNetUtil.h"
namespace mozilla {
namespace net {
namespace {
#define TRACKING_PROTECTION_FEATURE_NAME "tracking-protection"
#define URLCLASSIFIER_TRACKING_BLACKLIST "urlclassifier.trackingTable"
#define URLCLASSIFIER_TRACKING_BLACKLIST_TEST_ENTRIES \
"urlclassifier.trackingTable.testEntries"
#define URLCLASSIFIER_TRACKING_WHITELIST "urlclassifier.trackingWhitelistTable"
#define URLCLASSIFIER_TRACKING_WHITELIST_TEST_ENTRIES \
"urlclassifier.trackingWhitelistTable.testEntries"
#define URLCLASSIFIER_TRACKING_PROTECTION_SKIP_URLS \
"urlclassifier.trackingSkipURLs"
#define TABLE_TRACKING_BLACKLIST_PREF "tracking-blacklist-pref"
#define TABLE_TRACKING_WHITELIST_PREF "tracking-whitelist-pref"
StaticRefPtr<UrlClassifierFeatureTrackingProtection> gFeatureTrackingProtection;
} // namespace
UrlClassifierFeatureTrackingProtection::UrlClassifierFeatureTrackingProtection()
: UrlClassifierFeatureBase(
NS_LITERAL_CSTRING(TRACKING_PROTECTION_FEATURE_NAME),
NS_LITERAL_CSTRING(URLCLASSIFIER_TRACKING_BLACKLIST),
NS_LITERAL_CSTRING(URLCLASSIFIER_TRACKING_WHITELIST),
NS_LITERAL_CSTRING(URLCLASSIFIER_TRACKING_BLACKLIST_TEST_ENTRIES),
NS_LITERAL_CSTRING(URLCLASSIFIER_TRACKING_WHITELIST_TEST_ENTRIES),
NS_LITERAL_CSTRING(TABLE_TRACKING_BLACKLIST_PREF),
NS_LITERAL_CSTRING(TABLE_TRACKING_WHITELIST_PREF),
NS_LITERAL_CSTRING(URLCLASSIFIER_TRACKING_PROTECTION_SKIP_URLS)) {}
/* static */ const char* UrlClassifierFeatureTrackingProtection::Name() {
return TRACKING_PROTECTION_FEATURE_NAME;
}
/* static */
void UrlClassifierFeatureTrackingProtection::MaybeInitialize() {
MOZ_ASSERT(XRE_IsParentProcess());
UC_LOG(("UrlClassifierFeatureTrackingProtection: MaybeInitialize"));
if (!gFeatureTrackingProtection) {
gFeatureTrackingProtection = new UrlClassifierFeatureTrackingProtection();
gFeatureTrackingProtection->InitializePreferences();
}
}
/* static */
void UrlClassifierFeatureTrackingProtection::MaybeShutdown() {
UC_LOG(("UrlClassifierFeatureTrackingProtection: Shutdown"));
if (gFeatureTrackingProtection) {
gFeatureTrackingProtection->ShutdownPreferences();
gFeatureTrackingProtection = nullptr;
}
}
/* static */
already_AddRefed<UrlClassifierFeatureTrackingProtection>
UrlClassifierFeatureTrackingProtection::MaybeCreate(nsIChannel* aChannel) {
MOZ_ASSERT(aChannel);
UC_LOG(("UrlClassifierFeatureTrackingProtection: MaybeCreate for channel %p",
aChannel));
nsCOMPtr<nsILoadContext> loadContext;
NS_QueryNotificationCallbacks(aChannel, loadContext);
if (!loadContext || !loadContext->UseTrackingProtection()) {
return nullptr;
}
nsCOMPtr<nsIURI> chanURI;
nsresult rv = aChannel->GetURI(getter_AddRefs(chanURI));
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
bool isThirdParty =
nsContentUtils::IsThirdPartyWindowOrChannel(nullptr, aChannel, chanURI);
if (!isThirdParty) {
if (UC_LOG_ENABLED()) {
nsCString spec = chanURI->GetSpecOrDefault();
spec.Truncate(
std::min(spec.Length(), UrlClassifierCommon::sMaxSpecLength));
UC_LOG(
("UrlClassifierFeatureTrackingProtection: Skipping tracking "
"protection checks for first party or top-level load channel[%p] "
"with uri %s",
aChannel, spec.get()));
}
return nullptr;
}
if (!UrlClassifierCommon::ShouldEnableClassifier(aChannel)) {
return nullptr;
}
MaybeInitialize();
MOZ_ASSERT(gFeatureTrackingProtection);
RefPtr<UrlClassifierFeatureTrackingProtection> self =
gFeatureTrackingProtection;
return self.forget();
}
/* static */
already_AddRefed<nsIUrlClassifierFeature>
UrlClassifierFeatureTrackingProtection::GetIfNameMatches(
const nsACString& aName) {
if (!aName.EqualsLiteral(TRACKING_PROTECTION_FEATURE_NAME)) {
return nullptr;
}
MaybeInitialize();
MOZ_ASSERT(gFeatureTrackingProtection);
RefPtr<UrlClassifierFeatureTrackingProtection> self =
gFeatureTrackingProtection;
return self.forget();
}
NS_IMETHODIMP
UrlClassifierFeatureTrackingProtection::ProcessChannel(
nsIChannel* aChannel, const nsTArray<nsCString>& aList,
const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
NS_ENSURE_ARG_POINTER(aChannel);
NS_ENSURE_ARG_POINTER(aShouldContinue);
bool isAllowListed = UrlClassifierCommon::IsAllowListed(aChannel);
// This is a blocking feature.
*aShouldContinue = isAllowListed;
if (isAllowListed) {
return NS_OK;
}
nsAutoCString list;
UrlClassifierCommon::TablesToString(aList, list);
UrlClassifierCommon::SetBlockedContent(aChannel, NS_ERROR_TRACKING_URI, list,
EmptyCString(), EmptyCString());
UC_LOG(
("UrlClassifierFeatureTrackingProtection::ProcessChannel, cancelling "
"channel[%p]",
aChannel));
nsCOMPtr<nsIHttpChannelInternal> httpChannel = do_QueryInterface(aChannel);
if (httpChannel) {
Unused << httpChannel->CancelByURLClassifier(NS_ERROR_TRACKING_URI);
} else {
Unused << aChannel->Cancel(NS_ERROR_TRACKING_URI);
}
return NS_OK;
}
NS_IMETHODIMP
UrlClassifierFeatureTrackingProtection::GetURIByListType(
nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
NS_ENSURE_ARG_POINTER(aChannel);
NS_ENSURE_ARG_POINTER(aURIType);
NS_ENSURE_ARG_POINTER(aURI);
if (aListType == nsIUrlClassifierFeature::blacklist) {
*aURIType = nsIUrlClassifierFeature::blacklistURI;
return aChannel->GetURI(aURI);
}
MOZ_ASSERT(aListType == nsIUrlClassifierFeature::whitelist);
*aURIType = nsIUrlClassifierFeature::pairwiseWhitelistURI;
return UrlClassifierCommon::CreatePairwiseWhiteListURI(aChannel, aURI);
}
} // namespace net
} // namespace mozilla