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-rw-r--r--dom/ipc/nsIContentParent.cpp328
1 files changed, 328 insertions, 0 deletions
diff --git a/dom/ipc/nsIContentParent.cpp b/dom/ipc/nsIContentParent.cpp
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+++ b/dom/ipc/nsIContentParent.cpp
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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 "nsIContentParent.h"
+
+#include "mozilla/AppProcessChecker.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/ContentParent.h"
+#include "mozilla/dom/ContentBridgeParent.h"
+#include "mozilla/dom/PTabContext.h"
+#include "mozilla/dom/PermissionMessageUtils.h"
+#include "mozilla/dom/TabParent.h"
+#include "mozilla/dom/ipc/BlobParent.h"
+#include "mozilla/dom/ipc/StructuredCloneData.h"
+#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
+#include "mozilla/ipc/FileDescriptorSetParent.h"
+#include "mozilla/ipc/PFileDescriptorSetParent.h"
+#include "mozilla/ipc/SendStreamAlloc.h"
+#include "mozilla/Unused.h"
+
+#include "nsFrameMessageManager.h"
+#include "nsIWebBrowserChrome.h"
+#include "nsPrintfCString.h"
+#include "xpcpublic.h"
+
+using namespace mozilla::jsipc;
+
+// XXX need another bug to move this to a common header.
+#ifdef DISABLE_ASSERTS_FOR_FUZZING
+#define ASSERT_UNLESS_FUZZING(...) do { } while (0)
+#else
+#define ASSERT_UNLESS_FUZZING(...) MOZ_ASSERT(false, __VA_ARGS__)
+#endif
+
+namespace mozilla {
+namespace dom {
+
+nsIContentParent::nsIContentParent()
+{
+ mMessageManager = nsFrameMessageManager::NewProcessMessageManager(true);
+}
+
+ContentParent*
+nsIContentParent::AsContentParent()
+{
+ MOZ_ASSERT(IsContentParent());
+ return static_cast<ContentParent*>(this);
+}
+
+ContentBridgeParent*
+nsIContentParent::AsContentBridgeParent()
+{
+ MOZ_ASSERT(IsContentBridgeParent());
+ return static_cast<ContentBridgeParent*>(this);
+}
+
+PJavaScriptParent*
+nsIContentParent::AllocPJavaScriptParent()
+{
+ return NewJavaScriptParent();
+}
+
+bool
+nsIContentParent::DeallocPJavaScriptParent(PJavaScriptParent* aParent)
+{
+ ReleaseJavaScriptParent(aParent);
+ return true;
+}
+
+bool
+nsIContentParent::CanOpenBrowser(const IPCTabContext& aContext)
+{
+ // (PopupIPCTabContext lets the child process prove that it has access to
+ // the app it's trying to open.)
+ // On e10s we also allow UnsafeTabContext to allow service workers to open
+ // windows. This is enforced in MaybeInvalidTabContext.
+ if (aContext.type() != IPCTabContext::TPopupIPCTabContext &&
+ aContext.type() != IPCTabContext::TUnsafeIPCTabContext) {
+ ASSERT_UNLESS_FUZZING("Unexpected IPCTabContext type. Aborting AllocPBrowserParent.");
+ return false;
+ }
+
+ if (aContext.type() == IPCTabContext::TPopupIPCTabContext) {
+ const PopupIPCTabContext& popupContext = aContext.get_PopupIPCTabContext();
+ if (popupContext.opener().type() != PBrowserOrId::TPBrowserParent) {
+ ASSERT_UNLESS_FUZZING("Unexpected PopupIPCTabContext type. Aborting AllocPBrowserParent.");
+ return false;
+ }
+
+ auto opener = TabParent::GetFrom(popupContext.opener().get_PBrowserParent());
+ if (!opener) {
+ ASSERT_UNLESS_FUZZING("Got null opener from child; aborting AllocPBrowserParent.");
+ return false;
+ }
+
+ // Popup windows of isMozBrowserElement frames must be isMozBrowserElement if
+ // the parent isMozBrowserElement. Allocating a !isMozBrowserElement frame with
+ // same app ID would allow the content to access data it's not supposed to.
+ if (!popupContext.isMozBrowserElement() && opener->IsMozBrowserElement()) {
+ ASSERT_UNLESS_FUZZING("Child trying to escalate privileges! Aborting AllocPBrowserParent.");
+ return false;
+ }
+ }
+
+ MaybeInvalidTabContext tc(aContext);
+ if (!tc.IsValid()) {
+ NS_ERROR(nsPrintfCString("Child passed us an invalid TabContext. (%s) "
+ "Aborting AllocPBrowserParent.",
+ tc.GetInvalidReason()).get());
+ return false;
+ }
+
+ return true;
+}
+
+PBrowserParent*
+nsIContentParent::AllocPBrowserParent(const TabId& aTabId,
+ const IPCTabContext& aContext,
+ const uint32_t& aChromeFlags,
+ const ContentParentId& aCpId,
+ const bool& aIsForApp,
+ const bool& aIsForBrowser)
+{
+ Unused << aCpId;
+ Unused << aIsForApp;
+ Unused << aIsForBrowser;
+
+ if (!CanOpenBrowser(aContext)) {
+ return nullptr;
+ }
+
+ uint32_t chromeFlags = aChromeFlags;
+ if (aContext.type() == IPCTabContext::TPopupIPCTabContext) {
+ // CanOpenBrowser has ensured that the IPCTabContext is of
+ // type PopupIPCTabContext, and that the opener TabParent is
+ // reachable.
+ const PopupIPCTabContext& popupContext = aContext.get_PopupIPCTabContext();
+ auto opener = TabParent::GetFrom(popupContext.opener().get_PBrowserParent());
+ // We must ensure that the private browsing and remoteness flags
+ // match those of the opener.
+ nsCOMPtr<nsILoadContext> loadContext = opener->GetLoadContext();
+ if (!loadContext) {
+ return nullptr;
+ }
+
+ bool isPrivate;
+ loadContext->GetUsePrivateBrowsing(&isPrivate);
+ if (isPrivate) {
+ chromeFlags |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
+ }
+ }
+
+ // And because we're allocating a remote browser, of course the
+ // window is remote.
+ chromeFlags |= nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;
+
+ MaybeInvalidTabContext tc(aContext);
+ MOZ_ASSERT(tc.IsValid());
+ TabParent* parent = new TabParent(this, aTabId, tc.GetTabContext(), chromeFlags);
+
+ // We release this ref in DeallocPBrowserParent()
+ NS_ADDREF(parent);
+ return parent;
+}
+
+bool
+nsIContentParent::DeallocPBrowserParent(PBrowserParent* aFrame)
+{
+ TabParent* parent = TabParent::GetFrom(aFrame);
+ NS_RELEASE(parent);
+ return true;
+}
+
+PBlobParent*
+nsIContentParent::AllocPBlobParent(const BlobConstructorParams& aParams)
+{
+ return BlobParent::Create(this, aParams);
+}
+
+bool
+nsIContentParent::DeallocPBlobParent(PBlobParent* aActor)
+{
+ BlobParent::Destroy(aActor);
+ return true;
+}
+
+BlobParent*
+nsIContentParent::GetOrCreateActorForBlob(Blob* aBlob)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(aBlob);
+
+ RefPtr<BlobImpl> blobImpl = aBlob->Impl();
+ MOZ_ASSERT(blobImpl);
+
+ return GetOrCreateActorForBlobImpl(blobImpl);
+}
+
+BlobParent*
+nsIContentParent::GetOrCreateActorForBlobImpl(BlobImpl* aImpl)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(aImpl);
+
+ BlobParent* actor = BlobParent::GetOrCreate(this, aImpl);
+ NS_ENSURE_TRUE(actor, nullptr);
+
+ return actor;
+}
+
+bool
+nsIContentParent::RecvSyncMessage(const nsString& aMsg,
+ const ClonedMessageData& aData,
+ InfallibleTArray<CpowEntry>&& aCpows,
+ const IPC::Principal& aPrincipal,
+ nsTArray<ipc::StructuredCloneData>* aRetvals)
+{
+ // FIXME Permission check in Content process
+ nsIPrincipal* principal = aPrincipal;
+ if (IsContentParent()) {
+ ContentParent* parent = AsContentParent();
+ if (!ContentParent::IgnoreIPCPrincipal() &&
+ parent && principal && !AssertAppPrincipal(parent, principal)) {
+ return false;
+ }
+ }
+
+ RefPtr<nsFrameMessageManager> ppm = mMessageManager;
+ if (ppm) {
+ ipc::StructuredCloneData data;
+ ipc::UnpackClonedMessageDataForParent(aData, data);
+
+ CrossProcessCpowHolder cpows(this, aCpows);
+ ppm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(ppm.get()), nullptr,
+ aMsg, true, &data, &cpows, aPrincipal, aRetvals);
+ }
+ return true;
+}
+
+bool
+nsIContentParent::RecvRpcMessage(const nsString& aMsg,
+ const ClonedMessageData& aData,
+ InfallibleTArray<CpowEntry>&& aCpows,
+ const IPC::Principal& aPrincipal,
+ nsTArray<ipc::StructuredCloneData>* aRetvals)
+{
+ // FIXME Permission check in Content process
+ nsIPrincipal* principal = aPrincipal;
+ if (IsContentParent()) {
+ ContentParent* parent = AsContentParent();
+ if (!ContentParent::IgnoreIPCPrincipal() &&
+ parent && principal && !AssertAppPrincipal(parent, principal)) {
+ return false;
+ }
+ }
+
+ RefPtr<nsFrameMessageManager> ppm = mMessageManager;
+ if (ppm) {
+ ipc::StructuredCloneData data;
+ ipc::UnpackClonedMessageDataForParent(aData, data);
+
+ CrossProcessCpowHolder cpows(this, aCpows);
+ ppm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(ppm.get()), nullptr,
+ aMsg, true, &data, &cpows, aPrincipal, aRetvals);
+ }
+ return true;
+}
+
+PFileDescriptorSetParent*
+nsIContentParent::AllocPFileDescriptorSetParent(const FileDescriptor& aFD)
+{
+ return new FileDescriptorSetParent(aFD);
+}
+
+bool
+nsIContentParent::DeallocPFileDescriptorSetParent(PFileDescriptorSetParent* aActor)
+{
+ delete static_cast<FileDescriptorSetParent*>(aActor);
+ return true;
+}
+
+PSendStreamParent*
+nsIContentParent::AllocPSendStreamParent()
+{
+ return mozilla::ipc::AllocPSendStreamParent();
+}
+
+bool
+nsIContentParent::DeallocPSendStreamParent(PSendStreamParent* aActor)
+{
+ delete aActor;
+ return true;
+}
+
+bool
+nsIContentParent::RecvAsyncMessage(const nsString& aMsg,
+ InfallibleTArray<CpowEntry>&& aCpows,
+ const IPC::Principal& aPrincipal,
+ const ClonedMessageData& aData)
+{
+ // FIXME Permission check in Content process
+ nsIPrincipal* principal = aPrincipal;
+ if (IsContentParent()) {
+ ContentParent* parent = AsContentParent();
+ if (!ContentParent::IgnoreIPCPrincipal() &&
+ parent && principal && !AssertAppPrincipal(parent, principal)) {
+ return false;
+ }
+ }
+
+ RefPtr<nsFrameMessageManager> ppm = mMessageManager;
+ if (ppm) {
+ ipc::StructuredCloneData data;
+ ipc::UnpackClonedMessageDataForParent(aData, data);
+
+ CrossProcessCpowHolder cpows(this, aCpows);
+ ppm->ReceiveMessage(static_cast<nsIContentFrameMessageManager*>(ppm.get()), nullptr,
+ aMsg, false, &data, &cpows, aPrincipal, nullptr);
+ }
+ return true;
+}
+
+} // namespace dom
+} // namespace mozilla
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