Add m-esr52 at 52.6.0

1 files changed, 553 insertions, 0 deletions

diff --git a/dom/base/nsPluginArray.cpp b/dom/base/nsPluginArray.cpp
new file mode 100644
index 000000000..b9c946ca3
--- /dev/null
+++ b/dom/base/nsPluginArray.cpp
@@ -0,0 +1,553 @@
+/* -*- 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 "nsPluginArray.h"
+
+#include "mozilla/dom/PluginArrayBinding.h"
+#include "mozilla/dom/PluginBinding.h"
+#include "mozilla/dom/HiddenPluginEvent.h"
+
+#include "nsMimeTypeArray.h"
+#include "Navigator.h"
+#include "nsIDocShell.h"
+#include "nsIWebNavigation.h"
+#include "nsPluginHost.h"
+#include "nsPluginTags.h"
+#include "nsIObserverService.h"
+#include "nsIWeakReference.h"
+#include "mozilla/Services.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsContentUtils.h"
+#include "nsIPermissionManager.h"
+#include "nsIDocument.h"
+#include "nsIBlocklistService.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsPluginArray::nsPluginArray(nsPIDOMWindowInner* aWindow)
+  : mWindow(aWindow)
+{
+}
+
+void
+nsPluginArray::Init()
+{
+  nsCOMPtr<nsIObserverService> obsService =
+    mozilla::services::GetObserverService();
+  if (obsService) {
+    obsService->AddObserver(this, "plugin-info-updated", true);
+  }
+}
+
+nsPluginArray::~nsPluginArray()
+{
+}
+
+static bool
+ResistFingerprinting() {
+  return !nsContentUtils::ThreadsafeIsCallerChrome() &&
+         nsContentUtils::ResistFingerprinting();
+}
+
+nsPIDOMWindowInner*
+nsPluginArray::GetParentObject() const
+{
+  MOZ_ASSERT(mWindow);
+  return mWindow;
+}
+
+JSObject*
+nsPluginArray::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return PluginArrayBinding::Wrap(aCx, this, aGivenProto);
+}
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPluginArray)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPluginArray)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPluginArray)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
+  NS_INTERFACE_MAP_ENTRY(nsIObserver)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsPluginArray,
+                                      mWindow,
+                                      mPlugins,
+                                      mCTPPlugins)
+
+static void
+GetPluginMimeTypes(const nsTArray<RefPtr<nsPluginElement> >& aPlugins,
+                   nsTArray<RefPtr<nsMimeType> >& aMimeTypes)
+{
+  for (uint32_t i = 0; i < aPlugins.Length(); ++i) {
+    nsPluginElement *plugin = aPlugins[i];
+    aMimeTypes.AppendElements(plugin->MimeTypes());
+  }
+}
+
+static bool
+operator<(const RefPtr<nsMimeType>& lhs, const RefPtr<nsMimeType>& rhs)
+{
+  // Sort MIME types alphabetically by type name.
+  return lhs->Type() < rhs->Type();
+}
+
+void
+nsPluginArray::GetMimeTypes(nsTArray<RefPtr<nsMimeType>>& aMimeTypes)
+{
+  aMimeTypes.Clear();
+
+  if (!AllowPlugins()) {
+    return;
+  }
+
+  EnsurePlugins();
+
+  GetPluginMimeTypes(mPlugins, aMimeTypes);
+
+  // Alphabetize the enumeration order of non-hidden MIME types to reduce
+  // fingerprintable entropy based on plugins' installation file times.
+  aMimeTypes.Sort();
+}
+
+void
+nsPluginArray::GetCTPMimeTypes(nsTArray<RefPtr<nsMimeType>>& aMimeTypes)
+{
+  aMimeTypes.Clear();
+
+  if (!AllowPlugins()) {
+    return;
+  }
+
+  EnsurePlugins();
+
+  GetPluginMimeTypes(mCTPPlugins, aMimeTypes);
+
+  // Alphabetize the enumeration order of non-hidden MIME types to reduce
+  // fingerprintable entropy based on plugins' installation file times.
+  aMimeTypes.Sort();
+}
+
+nsPluginElement*
+nsPluginArray::Item(uint32_t aIndex)
+{
+  bool unused;
+  return IndexedGetter(aIndex, unused);
+}
+
+nsPluginElement*
+nsPluginArray::NamedItem(const nsAString& aName)
+{
+  bool unused;
+  return NamedGetter(aName, unused);
+}
+
+void
+nsPluginArray::Refresh(bool aReloadDocuments)
+{
+  RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
+
+  if(!AllowPlugins() || !pluginHost) {
+    return;
+  }
+
+  // NS_ERROR_PLUGINS_PLUGINSNOTCHANGED on reloading plugins indicates
+  // that plugins did not change and was not reloaded
+  if (pluginHost->ReloadPlugins() ==
+      NS_ERROR_PLUGINS_PLUGINSNOTCHANGED) {
+    nsTArray<nsCOMPtr<nsIInternalPluginTag> > newPluginTags;
+    pluginHost->GetPlugins(newPluginTags);
+
+    // Check if the number of plugins we know about are different from
+    // the number of plugin tags the plugin host knows about. If the
+    // lengths are different, we refresh. This is safe because we're
+    // notified for every plugin enabling/disabling event that
+    // happens, and therefore the lengths will be in sync only when
+    // the both arrays contain the same plugin tags (though as
+    // different types).
+    if (newPluginTags.Length() == mPlugins.Length()) {
+      return;
+    }
+  }
+
+  mPlugins.Clear();
+  mCTPPlugins.Clear();
+
+  nsCOMPtr<nsIDOMNavigator> navigator = mWindow->GetNavigator();
+
+  if (!navigator) {
+    return;
+  }
+
+  static_cast<mozilla::dom::Navigator*>(navigator.get())->RefreshMIMEArray();
+
+  nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(mWindow);
+  if (aReloadDocuments && webNav) {
+    webNav->Reload(nsIWebNavigation::LOAD_FLAGS_NONE);
+  }
+}
+
+nsPluginElement*
+nsPluginArray::IndexedGetter(uint32_t aIndex, bool &aFound)
+{
+  aFound = false;
+
+  if (!AllowPlugins() || ResistFingerprinting()) {
+    return nullptr;
+  }
+
+  EnsurePlugins();
+
+  aFound = aIndex < mPlugins.Length();
+
+  if (!aFound) {
+    return nullptr;
+  }
+
+  return mPlugins[aIndex];
+}
+
+void
+nsPluginArray::Invalidate()
+{
+  nsCOMPtr<nsIObserverService> obsService =
+    mozilla::services::GetObserverService();
+  if (obsService) {
+    obsService->RemoveObserver(this, "plugin-info-updated");
+  }
+}
+
+static nsPluginElement*
+FindPlugin(const nsTArray<RefPtr<nsPluginElement> >& aPlugins,
+           const nsAString& aName)
+{
+  for (uint32_t i = 0; i < aPlugins.Length(); ++i) {
+    nsAutoString pluginName;
+    nsPluginElement* plugin = aPlugins[i];
+    plugin->GetName(pluginName);
+
+    if (pluginName.Equals(aName)) {
+      return plugin;
+    }
+  }
+
+  return nullptr;
+}
+
+nsPluginElement*
+nsPluginArray::NamedGetter(const nsAString& aName, bool &aFound)
+{
+  aFound = false;
+
+  if (!AllowPlugins() || ResistFingerprinting()) {
+    return nullptr;
+  }
+
+  EnsurePlugins();
+
+  nsPluginElement* plugin = FindPlugin(mPlugins, aName);
+  aFound = (plugin != nullptr);
+  if (!aFound) {
+    nsPluginElement* hiddenPlugin = FindPlugin(mCTPPlugins, aName);
+    if (hiddenPlugin) {
+      NotifyHiddenPluginTouched(hiddenPlugin);
+    }
+  }
+  return plugin;
+}
+
+void nsPluginArray::NotifyHiddenPluginTouched(nsPluginElement* aHiddenElement)
+{
+  HiddenPluginEventInit init;
+  init.mTag = aHiddenElement->PluginTag();
+  nsCOMPtr<nsIDocument> doc = aHiddenElement->GetParentObject()->GetDoc();
+  RefPtr<HiddenPluginEvent> event =
+    HiddenPluginEvent::Constructor(doc, NS_LITERAL_STRING("HiddenPlugin"), init);
+  event->SetTarget(doc);
+  event->SetTrusted(true);
+  event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = true;
+  bool dummy;
+  doc->DispatchEvent(event, &dummy);
+}
+
+uint32_t
+nsPluginArray::Length()
+{
+  if (!AllowPlugins() || ResistFingerprinting()) {
+    return 0;
+  }
+
+  EnsurePlugins();
+
+  return mPlugins.Length();
+}
+
+void
+nsPluginArray::GetSupportedNames(nsTArray<nsString>& aRetval)
+{
+  aRetval.Clear();
+
+  if (!AllowPlugins()) {
+    return;
+  }
+
+  for (uint32_t i = 0; i < mPlugins.Length(); ++i) {
+    nsAutoString pluginName;
+    mPlugins[i]->GetName(pluginName);
+
+    aRetval.AppendElement(pluginName);
+  }
+}
+
+NS_IMETHODIMP
+nsPluginArray::Observe(nsISupports *aSubject, const char *aTopic,
+                       const char16_t *aData) {
+  if (!nsCRT::strcmp(aTopic, "plugin-info-updated")) {
+    Refresh(false);
+  }
+
+  return NS_OK;
+}
+
+bool
+nsPluginArray::AllowPlugins() const
+{
+  nsCOMPtr<nsIDocShell> docShell = mWindow ? mWindow->GetDocShell() : nullptr;
+
+  return docShell && docShell->PluginsAllowedInCurrentDoc();
+}
+
+static bool
+operator<(const RefPtr<nsPluginElement>& lhs,
+          const RefPtr<nsPluginElement>& rhs)
+{
+  // Sort plugins alphabetically by name.
+  return lhs->PluginTag()->Name() < rhs->PluginTag()->Name();
+}
+
+static bool
+PluginShouldBeHidden(nsCString aName) {
+  // This only supports one hidden plugin
+  return Preferences::GetCString("plugins.navigator.hidden_ctp_plugin").Equals(aName);
+}
+
+void
+nsPluginArray::EnsurePlugins()
+{
+  if (!mPlugins.IsEmpty() || !mCTPPlugins.IsEmpty()) {
+    // We already have an array of plugin elements.
+    return;
+  }
+
+  RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
+  if (!pluginHost) {
+    // We have no plugin host.
+    return;
+  }
+
+  nsTArray<nsCOMPtr<nsIInternalPluginTag> > pluginTags;
+  pluginHost->GetPlugins(pluginTags);
+
+  // need to wrap each of these with a nsPluginElement, which is
+  // scriptable.
+  for (uint32_t i = 0; i < pluginTags.Length(); ++i) {
+    nsCOMPtr<nsPluginTag> pluginTag = do_QueryInterface(pluginTags[i]);
+    if (!pluginTag) {
+      mPlugins.AppendElement(new nsPluginElement(mWindow, pluginTags[i]));
+    } else if (pluginTag->IsActive()) {
+      uint32_t permission = nsIPermissionManager::ALLOW_ACTION;
+      uint32_t blocklistState;
+      if (pluginTag->IsClicktoplay() &&
+          NS_SUCCEEDED(pluginTag->GetBlocklistState(&blocklistState)) &&
+          blocklistState == nsIBlocklistService::STATE_NOT_BLOCKED) {
+        nsCString name;
+        pluginTag->GetName(name);
+        if (PluginShouldBeHidden(name)) {
+          RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
+          nsCString permString;
+          nsresult rv = pluginHost->GetPermissionStringForTag(pluginTag, 0, permString);
+          if (rv == NS_OK) {
+            nsIPrincipal* principal = mWindow->GetExtantDoc()->NodePrincipal();
+            nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
+            permMgr->TestPermissionFromPrincipal(principal, permString.get(), &permission);
+          }
+        }
+      }
+      if (permission == nsIPermissionManager::ALLOW_ACTION) {
+        mPlugins.AppendElement(new nsPluginElement(mWindow, pluginTags[i]));
+      } else {
+        mCTPPlugins.AppendElement(new nsPluginElement(mWindow, pluginTags[i]));
+      }
+    }
+  }
+
+  if (mPlugins.Length() == 0 && mCTPPlugins.Length() != 0) {
+    nsCOMPtr<nsPluginTag> hiddenTag = new nsPluginTag("Hidden Plugin", NULL, "dummy.plugin", NULL, NULL,
+                                                      NULL, NULL, NULL, 0, 0, false);
+    mPlugins.AppendElement(new nsPluginElement(mWindow, hiddenTag));
+  }
+
+  // Alphabetize the enumeration order of non-hidden plugins to reduce
+  // fingerprintable entropy based on plugins' installation file times.
+  mPlugins.Sort();
+}
+
+// nsPluginElement implementation.
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPluginElement)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPluginElement)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPluginElement)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsPluginElement, mWindow, mMimeTypes)
+
+nsPluginElement::nsPluginElement(nsPIDOMWindowInner* aWindow,
+                                 nsIInternalPluginTag* aPluginTag)
+  : mWindow(aWindow),
+    mPluginTag(aPluginTag)
+{
+}
+
+nsPluginElement::~nsPluginElement()
+{
+}
+
+nsPIDOMWindowInner*
+nsPluginElement::GetParentObject() const
+{
+  MOZ_ASSERT(mWindow);
+  return mWindow;
+}
+
+JSObject*
+nsPluginElement::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return PluginBinding::Wrap(aCx, this, aGivenProto);
+}
+
+void
+nsPluginElement::GetDescription(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->Description(), retval);
+}
+
+void
+nsPluginElement::GetFilename(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->FileName(), retval);
+}
+
+void
+nsPluginElement::GetVersion(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->Version(), retval);
+}
+
+void
+nsPluginElement::GetName(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->Name(), retval);
+}
+
+nsMimeType*
+nsPluginElement::Item(uint32_t aIndex)
+{
+  EnsurePluginMimeTypes();
+
+  return mMimeTypes.SafeElementAt(aIndex);
+}
+
+nsMimeType*
+nsPluginElement::NamedItem(const nsAString& aName)
+{
+  bool unused;
+  return NamedGetter(aName, unused);
+}
+
+nsMimeType*
+nsPluginElement::IndexedGetter(uint32_t aIndex, bool &aFound)
+{
+  EnsurePluginMimeTypes();
+
+  aFound = aIndex < mMimeTypes.Length();
+
+  if (!aFound) {
+    return nullptr;
+  }
+
+  return mMimeTypes[aIndex];
+}
+
+nsMimeType*
+nsPluginElement::NamedGetter(const nsAString& aName, bool &aFound)
+{
+  EnsurePluginMimeTypes();
+
+  aFound = false;
+
+  for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
+    if (mMimeTypes[i]->Type().Equals(aName)) {
+      aFound = true;
+
+      return mMimeTypes[i];
+    }
+  }
+
+  return nullptr;
+}
+
+uint32_t
+nsPluginElement::Length()
+{
+  EnsurePluginMimeTypes();
+
+  return mMimeTypes.Length();
+}
+
+void
+nsPluginElement::GetSupportedNames(nsTArray<nsString>& retval)
+{
+  EnsurePluginMimeTypes();
+
+  for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
+    retval.AppendElement(mMimeTypes[i]->Type());
+  }
+}
+
+nsTArray<RefPtr<nsMimeType> >&
+nsPluginElement::MimeTypes()
+{
+  EnsurePluginMimeTypes();
+
+  return mMimeTypes;
+}
+
+void
+nsPluginElement::EnsurePluginMimeTypes()
+{
+  if (!mMimeTypes.IsEmpty()) {
+    return;
+  }
+
+  if (mPluginTag->MimeTypes().Length() != mPluginTag->MimeDescriptions().Length() ||
+      mPluginTag->MimeTypes().Length() != mPluginTag->Extensions().Length()) {
+    MOZ_ASSERT(false, "mime type arrays expected to be the same length");
+    return;
+  }
+
+  for (uint32_t i = 0; i < mPluginTag->MimeTypes().Length(); ++i) {
+    NS_ConvertUTF8toUTF16 type(mPluginTag->MimeTypes()[i]);
+    NS_ConvertUTF8toUTF16 description(mPluginTag->MimeDescriptions()[i]);
+    NS_ConvertUTF8toUTF16 extension(mPluginTag->Extensions()[i]);
+
+    mMimeTypes.AppendElement(new nsMimeType(mWindow, this, type, description,
+                                            extension));
+  }
+}