diff options
Diffstat (limited to 'dom/cache/CacheStorage.cpp')
| -rw-r--r-- | dom/cache/CacheStorage.cpp | 592 |
1 files changed, 592 insertions, 0 deletions
diff --git a/dom/cache/CacheStorage.cpp b/dom/cache/CacheStorage.cpp new file mode 100644 index 0000000000..c1a1ead48a --- /dev/null +++ b/dom/cache/CacheStorage.cpp @@ -0,0 +1,592 @@ +/* -*- 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 "mozilla/dom/cache/CacheStorage.h" + +#include "mozilla/Preferences.h" +#include "mozilla/Unused.h" +#include "mozilla/dom/CacheBinding.h" +#include "mozilla/dom/CacheStorageBinding.h" +#include "mozilla/dom/InternalRequest.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/dom/Response.h" +#include "mozilla/dom/cache/AutoUtils.h" +#include "mozilla/dom/cache/Cache.h" +#include "mozilla/dom/cache/CacheChild.h" +#include "mozilla/dom/cache/CacheCommon.h" +#include "mozilla/dom/cache/CacheStorageChild.h" +#include "mozilla/dom/cache/CacheWorkerRef.h" +#include "mozilla/dom/cache/PCacheChild.h" +#include "mozilla/dom/cache/ReadStream.h" +#include "mozilla/dom/cache/TypeUtils.h" +#include "mozilla/dom/quota/QuotaManager.h" +#include "mozilla/dom/quota/ResultExtensions.h" +#include "mozilla/dom/WorkerPrivate.h" +#include "mozilla/ipc/BackgroundChild.h" +#include "mozilla/ipc/BackgroundUtils.h" +#include "mozilla/ipc/PBackgroundChild.h" +#include "mozilla/ipc/PBackgroundSharedTypes.h" +#include "mozilla/StaticPrefs_dom.h" +#include "mozilla/StaticPrefs_extensions.h" +#include "nsContentUtils.h" +#include "mozilla/dom/Document.h" +#include "nsIGlobalObject.h" +#include "nsMixedContentBlocker.h" +#include "nsURLParsers.h" +#include "js/Object.h" // JS::GetClass +#include "js/PropertyAndElement.h" // JS_DefineProperty + +namespace mozilla::dom::cache { + +using mozilla::ErrorResult; +using mozilla::dom::quota::QuotaManager; +using mozilla::ipc::BackgroundChild; +using mozilla::ipc::PBackgroundChild; +using mozilla::ipc::PrincipalInfo; +using mozilla::ipc::PrincipalToPrincipalInfo; + +NS_IMPL_CYCLE_COLLECTING_ADDREF(mozilla::dom::cache::CacheStorage); +NS_IMPL_CYCLE_COLLECTING_RELEASE(mozilla::dom::cache::CacheStorage); +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(mozilla::dom::cache::CacheStorage, + mGlobal); + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CacheStorage) + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY + NS_INTERFACE_MAP_ENTRY(nsISupports) +NS_INTERFACE_MAP_END + +// We cannot reference IPC types in a webidl binding implementation header. So +// define this in the .cpp. +struct CacheStorage::Entry final { + RefPtr<Promise> mPromise; + CacheOpArgs mArgs; + // We cannot add the requests until after the actor is present. So store + // the request data separately for now. + SafeRefPtr<InternalRequest> mRequest; +}; + +namespace { + +bool IsTrusted(const PrincipalInfo& aPrincipalInfo, bool aTestingPrefEnabled) { + // Can happen on main thread or worker thread + + if (aPrincipalInfo.type() == PrincipalInfo::TSystemPrincipalInfo) { + return true; + } + + // Require a ContentPrincipal to avoid null principal, etc. + QM_TRY(OkIf(aPrincipalInfo.type() == PrincipalInfo::TContentPrincipalInfo), + false); + + // If we're in testing mode, then don't do any more work to determine if + // the origin is trusted. We have to run some tests as http. + if (aTestingPrefEnabled) { + return true; + } + + // Now parse the scheme of the principal's origin. This is a short term + // method for determining "trust". In the long term we need to implement + // the full algorithm here: + // + // https://w3c.github.io/webappsec/specs/powerfulfeatures/#settings-secure + // + // TODO: Implement full secure setting algorithm. (bug 1177856) + + const nsCString& flatURL = aPrincipalInfo.get_ContentPrincipalInfo().spec(); + const char* const url = flatURL.get(); + + // off the main thread URL parsing using nsStdURLParser. + const nsCOMPtr<nsIURLParser> urlParser = new nsStdURLParser(); + + uint32_t schemePos; + int32_t schemeLen; + uint32_t authPos; + int32_t authLen; + QM_TRY(MOZ_TO_RESULT(urlParser->ParseURL(url, flatURL.Length(), &schemePos, + &schemeLen, &authPos, &authLen, + nullptr, nullptr)), // ignore path + false); + + const nsAutoCString scheme(Substring(flatURL, schemePos, schemeLen)); + if (scheme.LowerCaseEqualsLiteral("https") || + scheme.LowerCaseEqualsLiteral("file") || + scheme.LowerCaseEqualsLiteral("moz-extension")) { + return true; + } + + uint32_t hostPos; + int32_t hostLen; + QM_TRY(MOZ_TO_RESULT( + urlParser->ParseAuthority(url + authPos, authLen, nullptr, + nullptr, // ignore username + nullptr, nullptr, // ignore password + &hostPos, &hostLen, + nullptr)), // ignore port + false); + + return nsMixedContentBlocker::IsPotentiallyTrustworthyLoopbackHost( + nsDependentCSubstring(url + authPos + hostPos, hostLen)); +} + +} // namespace + +// static +already_AddRefed<CacheStorage> CacheStorage::CreateOnMainThread( + Namespace aNamespace, nsIGlobalObject* aGlobal, nsIPrincipal* aPrincipal, + bool aForceTrustedOrigin, ErrorResult& aRv) { + MOZ_DIAGNOSTIC_ASSERT(aGlobal); + MOZ_DIAGNOSTIC_ASSERT(aPrincipal); + MOZ_ASSERT(NS_IsMainThread()); + + PrincipalInfo principalInfo; + QM_TRY(MOZ_TO_RESULT(PrincipalToPrincipalInfo(aPrincipal, &principalInfo)), + nullptr, [&aRv](const nsresult rv) { aRv.Throw(rv); }); + + QM_TRY(OkIf(QuotaManager::IsPrincipalInfoValid(principalInfo)), + RefPtr{new CacheStorage(NS_ERROR_DOM_SECURITY_ERR)}.forget(), + [](const auto) { + NS_WARNING("CacheStorage not supported on invalid origins."); + }); + + const bool testingEnabled = + aForceTrustedOrigin || + Preferences::GetBool("dom.caches.testing.enabled", false) || + StaticPrefs::dom_serviceWorkers_testing_enabled(); + + if (!IsTrusted(principalInfo, testingEnabled)) { + NS_WARNING("CacheStorage not supported on untrusted origins."); + RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR); + return ref.forget(); + } + + RefPtr<CacheStorage> ref = + new CacheStorage(aNamespace, aGlobal, principalInfo, nullptr); + return ref.forget(); +} + +// static +already_AddRefed<CacheStorage> CacheStorage::CreateOnWorker( + Namespace aNamespace, nsIGlobalObject* aGlobal, + WorkerPrivate* aWorkerPrivate, ErrorResult& aRv) { + MOZ_DIAGNOSTIC_ASSERT(aGlobal); + MOZ_DIAGNOSTIC_ASSERT(aWorkerPrivate); + aWorkerPrivate->AssertIsOnWorkerThread(); + + if (aWorkerPrivate->GetOriginAttributes().mPrivateBrowsingId > 0) { + NS_WARNING("CacheStorage not supported during private browsing."); + RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR); + return ref.forget(); + } + + SafeRefPtr<CacheWorkerRef> workerRef = + CacheWorkerRef::Create(aWorkerPrivate, CacheWorkerRef::eIPCWorkerRef); + if (!workerRef) { + NS_WARNING("Worker thread is shutting down."); + aRv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + + const PrincipalInfo& principalInfo = + aWorkerPrivate->GetEffectiveStoragePrincipalInfo(); + + QM_TRY(OkIf(QuotaManager::IsPrincipalInfoValid(principalInfo)), nullptr, + [&aRv](const auto) { aRv.Throw(NS_ERROR_FAILURE); }); + + // We have a number of cases where we want to skip the https scheme + // validation: + // + // 1) Any worker when dom.caches.testing.enabled pref is true. + // 2) Any worker when dom.serviceWorkers.testing.enabled pref is true. This + // is mainly because most sites using SWs will expect Cache to work if + // SWs are enabled. + // 3) If the window that created this worker has the devtools SW testing + // option enabled. Same reasoning as (2). + // 4) If the worker itself is a ServiceWorker, then we always skip the + // origin checks. The ServiceWorker has its own trusted origin checks + // that are better than ours. In addition, we don't have information + // about the window any more, so we can't do our own checks. + bool testingEnabled = StaticPrefs::dom_caches_testing_enabled() || + StaticPrefs::dom_serviceWorkers_testing_enabled() || + aWorkerPrivate->ServiceWorkersTestingInWindow() || + aWorkerPrivate->IsServiceWorker(); + + if (!IsTrusted(principalInfo, testingEnabled)) { + NS_WARNING("CacheStorage not supported on untrusted origins."); + RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR); + return ref.forget(); + } + + RefPtr<CacheStorage> ref = new CacheStorage( + aNamespace, aGlobal, principalInfo, std::move(workerRef)); + return ref.forget(); +} + +// static +bool CacheStorage::DefineCaches(JSContext* aCx, JS::Handle<JSObject*> aGlobal) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_DIAGNOSTIC_ASSERT(JS::GetClass(aGlobal)->flags & JSCLASS_DOM_GLOBAL, + "Passed object is not a global object!"); + js::AssertSameCompartment(aCx, aGlobal); + + if (NS_WARN_IF(!CacheStorage_Binding::GetConstructorObject(aCx) || + !Cache_Binding::GetConstructorObject(aCx))) { + return false; + } + + nsIPrincipal* principal = nsContentUtils::ObjectPrincipal(aGlobal); + MOZ_DIAGNOSTIC_ASSERT(principal); + + ErrorResult rv; + RefPtr<CacheStorage> storage = + CreateOnMainThread(DEFAULT_NAMESPACE, xpc::NativeGlobal(aGlobal), + principal, true, /* force trusted */ + rv); + if (NS_WARN_IF(rv.MaybeSetPendingException(aCx))) { + return false; + } + + JS::Rooted<JS::Value> caches(aCx); + if (NS_WARN_IF(!ToJSValue(aCx, storage, &caches))) { + return false; + } + + return JS_DefineProperty(aCx, aGlobal, "caches", caches, JSPROP_ENUMERATE); +} + +CacheStorage::CacheStorage(Namespace aNamespace, nsIGlobalObject* aGlobal, + const PrincipalInfo& aPrincipalInfo, + SafeRefPtr<CacheWorkerRef> aWorkerRef) + : mNamespace(aNamespace), + mGlobal(aGlobal), + mPrincipalInfo(MakeUnique<PrincipalInfo>(aPrincipalInfo)), + mActor(nullptr), + mStatus(NS_OK) { + MOZ_DIAGNOSTIC_ASSERT(mGlobal); + + // If the PBackground actor is already initialized then we can + // immediately use it + PBackgroundChild* actor = BackgroundChild::GetOrCreateForCurrentThread(); + if (NS_WARN_IF(!actor)) { + mStatus = NS_ERROR_UNEXPECTED; + return; + } + + // WorkerRef ownership is passed to the CacheStorageChild actor and any + // actors it may create. The WorkerRef will keep the worker thread alive + // until the actors can gracefully shutdown. + CacheStorageChild* newActor = + new CacheStorageChild(this, std::move(aWorkerRef)); + PCacheStorageChild* constructedActor = actor->SendPCacheStorageConstructor( + newActor, mNamespace, *mPrincipalInfo); + + if (NS_WARN_IF(!constructedActor)) { + mStatus = NS_ERROR_UNEXPECTED; + return; + } + + MOZ_DIAGNOSTIC_ASSERT(constructedActor == newActor); + mActor = newActor; +} + +CacheStorage::CacheStorage(nsresult aFailureResult) + : mNamespace(INVALID_NAMESPACE), mActor(nullptr), mStatus(aFailureResult) { + MOZ_DIAGNOSTIC_ASSERT(NS_FAILED(mStatus)); +} + +already_AddRefed<Promise> CacheStorage::Match( + JSContext* aCx, const RequestOrUSVString& aRequest, + const MultiCacheQueryOptions& aOptions, ErrorResult& aRv) { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + + if (!HasStorageAccess(eUseCounter_custom_PrivateBrowsingCachesMatch, + UseCounterWorker::Custom_PrivateBrowsingCachesMatch)) { + aRv.Throw(NS_ERROR_DOM_SECURITY_ERR); + return nullptr; + } + + if (NS_WARN_IF(NS_FAILED(mStatus))) { + aRv.Throw(mStatus); + return nullptr; + } + + SafeRefPtr<InternalRequest> request = + ToInternalRequest(aCx, aRequest, IgnoreBody, aRv); + if (NS_WARN_IF(aRv.Failed())) { + return nullptr; + } + + RefPtr<Promise> promise = Promise::Create(mGlobal, aRv); + if (NS_WARN_IF(!promise)) { + return nullptr; + } + + CacheQueryParams params; + ToCacheQueryParams(params, aOptions); + + auto entry = MakeUnique<Entry>(); + entry->mPromise = promise; + entry->mArgs = StorageMatchArgs(CacheRequest(), params, GetOpenMode()); + entry->mRequest = std::move(request); + + RunRequest(std::move(entry)); + + return promise.forget(); +} + +already_AddRefed<Promise> CacheStorage::Has(const nsAString& aKey, + ErrorResult& aRv) { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + + if (!HasStorageAccess(eUseCounter_custom_PrivateBrowsingCachesHas, + UseCounterWorker::Custom_PrivateBrowsingCachesHas)) { + aRv.Throw(NS_ERROR_DOM_SECURITY_ERR); + return nullptr; + } + + if (NS_WARN_IF(NS_FAILED(mStatus))) { + aRv.Throw(mStatus); + return nullptr; + } + + RefPtr<Promise> promise = Promise::Create(mGlobal, aRv); + if (NS_WARN_IF(!promise)) { + return nullptr; + } + + auto entry = MakeUnique<Entry>(); + entry->mPromise = promise; + entry->mArgs = StorageHasArgs(nsString(aKey)); + + RunRequest(std::move(entry)); + + return promise.forget(); +} + +already_AddRefed<Promise> CacheStorage::Open(const nsAString& aKey, + ErrorResult& aRv) { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + + if (!HasStorageAccess(eUseCounter_custom_PrivateBrowsingCachesOpen, + UseCounterWorker::Custom_PrivateBrowsingCachesOpen)) { + aRv.Throw(NS_ERROR_DOM_SECURITY_ERR); + return nullptr; + } + + if (NS_WARN_IF(NS_FAILED(mStatus))) { + aRv.Throw(mStatus); + return nullptr; + } + + RefPtr<Promise> promise = Promise::Create(mGlobal, aRv); + if (NS_WARN_IF(!promise)) { + return nullptr; + } + + auto entry = MakeUnique<Entry>(); + entry->mPromise = promise; + entry->mArgs = StorageOpenArgs(nsString(aKey)); + + RunRequest(std::move(entry)); + + return promise.forget(); +} + +already_AddRefed<Promise> CacheStorage::Delete(const nsAString& aKey, + ErrorResult& aRv) { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + + if (!HasStorageAccess(eUseCounter_custom_PrivateBrowsingCachesDelete, + UseCounterWorker::Custom_PrivateBrowsingCachesDelete)) { + aRv.Throw(NS_ERROR_DOM_SECURITY_ERR); + return nullptr; + } + + if (NS_WARN_IF(NS_FAILED(mStatus))) { + aRv.Throw(mStatus); + return nullptr; + } + + RefPtr<Promise> promise = Promise::Create(mGlobal, aRv); + if (NS_WARN_IF(!promise)) { + return nullptr; + } + + auto entry = MakeUnique<Entry>(); + entry->mPromise = promise; + entry->mArgs = StorageDeleteArgs(nsString(aKey)); + + RunRequest(std::move(entry)); + + return promise.forget(); +} + +already_AddRefed<Promise> CacheStorage::Keys(ErrorResult& aRv) { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + + if (!HasStorageAccess(eUseCounter_custom_PrivateBrowsingCachesKeys, + UseCounterWorker::Custom_PrivateBrowsingCachesKeys)) { + aRv.Throw(NS_ERROR_DOM_SECURITY_ERR); + return nullptr; + } + + if (NS_WARN_IF(NS_FAILED(mStatus))) { + aRv.Throw(mStatus); + return nullptr; + } + + RefPtr<Promise> promise = Promise::Create(mGlobal, aRv); + if (NS_WARN_IF(!promise)) { + return nullptr; + } + + auto entry = MakeUnique<Entry>(); + entry->mPromise = promise; + entry->mArgs = StorageKeysArgs(); + + RunRequest(std::move(entry)); + + return promise.forget(); +} + +// static +already_AddRefed<CacheStorage> CacheStorage::Constructor( + const GlobalObject& aGlobal, CacheStorageNamespace aNamespace, + nsIPrincipal* aPrincipal, ErrorResult& aRv) { + if (NS_WARN_IF(!NS_IsMainThread())) { + aRv.Throw(NS_ERROR_FAILURE); + return nullptr; + } + + // TODO: remove Namespace in favor of CacheStorageNamespace + static_assert(DEFAULT_NAMESPACE == (uint32_t)CacheStorageNamespace::Content, + "Default namespace should match webidl Content enum"); + static_assert( + CHROME_ONLY_NAMESPACE == (uint32_t)CacheStorageNamespace::Chrome, + "Chrome namespace should match webidl Chrome enum"); + static_assert(NUMBER_OF_NAMESPACES == CacheStorageNamespaceValues::Count, + "Number of namespace should match webidl count"); + + Namespace ns = static_cast<Namespace>(aNamespace); + nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports()); + + bool privateBrowsing = false; + if (nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(global)) { + RefPtr<Document> doc = window->GetExtantDoc(); + if (doc) { + nsCOMPtr<nsILoadContext> loadContext = doc->GetLoadContext(); + privateBrowsing = loadContext && loadContext->UsePrivateBrowsing(); + } + } + + if (privateBrowsing) { + RefPtr<CacheStorage> ref = new CacheStorage(NS_ERROR_DOM_SECURITY_ERR); + return ref.forget(); + } + + // Create a CacheStorage object bypassing the trusted origin checks + // since this is a chrome-only constructor. + return CreateOnMainThread(ns, global, aPrincipal, + true /* force trusted origin */, aRv); +} + +nsISupports* CacheStorage::GetParentObject() const { return mGlobal; } + +JSObject* CacheStorage::WrapObject(JSContext* aContext, + JS::Handle<JSObject*> aGivenProto) { + return mozilla::dom::CacheStorage_Binding::Wrap(aContext, this, aGivenProto); +} + +void CacheStorage::DestroyInternal(CacheStorageChild* aActor) { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + MOZ_DIAGNOSTIC_ASSERT(mActor); + MOZ_DIAGNOSTIC_ASSERT(mActor == aActor); + MOZ_DIAGNOSTIC_ASSERT(!NS_FAILED(mStatus)); + mActor->ClearListener(); + mActor = nullptr; + mStatus = NS_ERROR_UNEXPECTED; + + // Note that we will never get an actor again in case another request is + // made before this object is destructed. +} + +nsIGlobalObject* CacheStorage::GetGlobalObject() const { return mGlobal; } + +#ifdef DEBUG +void CacheStorage::AssertOwningThread() const { + NS_ASSERT_OWNINGTHREAD(CacheStorage); +} +#endif + +PBackgroundChild* CacheStorage::GetIPCManager() { + // This is true because CacheStorage always uses IgnoreBody for requests. + // So we should never need to get the IPC manager during Request or + // Response serialization. + MOZ_CRASH("CacheStorage does not implement TypeUtils::GetIPCManager()"); +} + +CacheStorage::~CacheStorage() { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + if (mActor) { + mActor->StartDestroyFromListener(); + // DestroyInternal() is called synchronously by StartDestroyFromListener(). + // So we should have already cleared the mActor. + MOZ_DIAGNOSTIC_ASSERT(!mActor); + } +} + +void CacheStorage::RunRequest(UniquePtr<Entry> aEntry) { + MOZ_ASSERT(mActor); + + AutoChildOpArgs args(this, aEntry->mArgs, 1); + + if (aEntry->mRequest) { + ErrorResult rv; + args.Add(*aEntry->mRequest, IgnoreBody, IgnoreInvalidScheme, rv); + if (NS_WARN_IF(rv.Failed())) { + aEntry->mPromise->MaybeReject(std::move(rv)); + return; + } + } + + mActor->ExecuteOp(mGlobal, aEntry->mPromise, this, args.SendAsOpArgs()); +} + +OpenMode CacheStorage::GetOpenMode() const { + return mNamespace == CHROME_ONLY_NAMESPACE ? OpenMode::Eager : OpenMode::Lazy; +} + +bool CacheStorage::HasStorageAccess(UseCounter aLabel, + UseCounterWorker aLabelWorker) const { + NS_ASSERT_OWNINGTHREAD(CacheStorage); + if (NS_WARN_IF(!mGlobal)) { + return false; + } + + StorageAccess access = mGlobal->GetStorageAccess(); + if (access == StorageAccess::ePrivateBrowsing) { + if (NS_IsMainThread()) { + SetUseCounter(mGlobal->GetGlobalJSObject(), aLabel); + } else { + SetUseCounter(aLabelWorker); + } + } + + // Deny storage access for private browsing. + if (nsIPrincipal* principal = mGlobal->PrincipalOrNull()) { + if (!principal->IsSystemPrincipal() && + principal->GetPrivateBrowsingId() != + nsIScriptSecurityManager::DEFAULT_PRIVATE_BROWSING_ID) { + return false; + } + } + + return access > StorageAccess::ePrivateBrowsing || + (StaticPrefs:: + privacy_partition_always_partition_third_party_non_cookie_storage() && + ShouldPartitionStorage(access)); +} + +} // namespace mozilla::dom::cache |