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a2db742a8c
Differential Revision: https://phabricator.services.mozilla.com/D24864 --HG-- extra : moz-landing-system : lando
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "StoragePrincipalHelper.h"
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#include "mozilla/ScopeExit.h"
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#include "mozilla/StaticPrefs.h"
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#include "nsContentUtils.h"
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#include "nsIHttpChannel.h"
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namespace mozilla {
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namespace {
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already_AddRefed<nsIURI> MaybeGetFirstPartyURI(nsIChannel* aChannel) {
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MOZ_ASSERT(aChannel);
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if (!StaticPrefs::privacy_storagePrincipal_enabledForTrackers()) {
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return nullptr;
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}
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// Let's use the storage principal only if we need to partition the cookie
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// jar.
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nsContentUtils::StorageAccess access =
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nsContentUtils::StorageAllowedForChannel(aChannel);
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if (access != nsContentUtils::StorageAccess::ePartitionedOrDeny) {
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return nullptr;
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}
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nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
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if (!httpChannel) {
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return nullptr;
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}
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MOZ_ASSERT(httpChannel->IsThirdPartyTrackingResource());
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nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
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nsCOMPtr<nsIPrincipal> toplevelPrincipal = loadInfo->GetTopLevelPrincipal();
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if (!toplevelPrincipal) {
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return nullptr;
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}
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nsCOMPtr<nsIURI> principalURI;
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nsresult rv = toplevelPrincipal->GetURI(getter_AddRefs(principalURI));
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return nullptr;
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}
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return principalURI.forget();
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}
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} // namespace
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// static
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nsresult StoragePrincipalHelper::Create(nsIChannel* aChannel,
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nsIPrincipal* aPrincipal,
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nsIPrincipal** aStoragePrincipal) {
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MOZ_ASSERT(aChannel);
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MOZ_ASSERT(aPrincipal);
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MOZ_ASSERT(aStoragePrincipal);
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auto scopeExit = MakeScopeExit([&] {
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nsCOMPtr<nsIPrincipal> storagePrincipal = aPrincipal;
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storagePrincipal.forget(aStoragePrincipal);
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});
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nsCOMPtr<nsIURI> principalURI = MaybeGetFirstPartyURI(aChannel);
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if (!principalURI) {
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return NS_OK;
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}
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scopeExit.release();
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nsCOMPtr<nsIPrincipal> storagePrincipal =
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BasePrincipal::Cast(aPrincipal)
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->CloneForcingFirstPartyDomain(principalURI);
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storagePrincipal.forget(aStoragePrincipal);
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return NS_OK;
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}
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// static
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nsresult StoragePrincipalHelper::PrepareOriginAttributes(
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nsIChannel* aChannel, OriginAttributes& aOriginAttributes) {
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MOZ_ASSERT(aChannel);
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nsCOMPtr<nsIURI> principalURI = MaybeGetFirstPartyURI(aChannel);
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if (!principalURI) {
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return NS_OK;
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}
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aOriginAttributes.SetFirstPartyDomain(false, principalURI,
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true /* aForced */);
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return NS_OK;
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}
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} // namespace mozilla
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