123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272 |
- // Copyright 2014 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "extensions/renderer/script_context_set.h"
- #include "base/bind.h"
- #include "base/feature_list.h"
- #include "base/location.h"
- #include "base/task/single_thread_task_runner.h"
- #include "base/threading/thread_task_runner_handle.h"
- #include "content/public/common/url_constants.h"
- #include "content/public/renderer/render_frame.h"
- #include "extensions/common/extension.h"
- #include "extensions/common/extension_features.h"
- #include "extensions/renderer/extension_frame_helper.h"
- #include "extensions/renderer/extensions_renderer_client.h"
- #include "extensions/renderer/script_context.h"
- #include "extensions/renderer/script_injection.h"
- #include "third_party/blink/public/web/blink.h"
- #include "third_party/blink/public/web/web_document.h"
- #include "third_party/blink/public/web/web_local_frame.h"
- #include "v8/include/v8-isolate.h"
- #include "v8/include/v8-object.h"
- namespace extensions {
- namespace {
- // There is only ever one instance of the ScriptContextSet.
- ScriptContextSet* g_context_set = nullptr;
- }
- ScriptContextSet::ScriptContextSet(ExtensionIdSet* active_extension_ids)
- : active_extension_ids_(active_extension_ids) {
- DCHECK(!g_context_set);
- g_context_set = this;
- }
- ScriptContextSet::~ScriptContextSet() {
- g_context_set = nullptr;
- }
- ScriptContext* ScriptContextSet::Register(
- blink::WebLocalFrame* frame,
- const v8::Local<v8::Context>& v8_context,
- int32_t world_id) {
- const Extension* extension =
- GetExtensionFromFrameAndWorld(frame, world_id, false);
- const Extension* effective_extension =
- GetExtensionFromFrameAndWorld(frame, world_id, true);
- mojom::ViewType view_type = mojom::ViewType::kInvalid;
- content::RenderFrame* render_frame =
- content::RenderFrame::FromWebFrame(frame);
- // In production, we should always have a corresponding render frame.
- // Unfortunately, this isn't the case in unit tests, so we can't DCHECK here.
- if (render_frame) {
- ExtensionFrameHelper* frame_helper =
- ExtensionFrameHelper::Get(render_frame);
- DCHECK(frame_helper);
- view_type = frame_helper->view_type();
- // We should only find an offscreen document if the corresponding feature
- // is enabled.
- DCHECK(base::FeatureList::IsEnabled(
- extensions_features::kExtensionsOffscreenDocuments) ||
- view_type != mojom::ViewType::kOffscreenDocument);
- }
- GURL frame_url = ScriptContext::GetDocumentLoaderURLForFrame(frame);
- Feature::Context context_type = ClassifyJavaScriptContext(
- extension, world_id, frame_url, frame->GetDocument().GetSecurityOrigin(),
- view_type);
- Feature::Context effective_context_type = ClassifyJavaScriptContext(
- effective_extension, world_id,
- ScriptContext::GetEffectiveDocumentURLForContext(frame, frame_url, true),
- frame->GetDocument().GetSecurityOrigin(), view_type);
- ScriptContext* context =
- new ScriptContext(v8_context, frame, extension, context_type,
- effective_extension, effective_context_type);
- contexts_.insert(context); // takes ownership
- return context;
- }
- void ScriptContextSet::Remove(ScriptContext* context) {
- if (contexts_.erase(context)) {
- context->Invalidate();
- base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, context);
- }
- }
- ScriptContext* ScriptContextSet::GetCurrent() const {
- v8::Isolate* isolate = v8::Isolate::GetCurrent();
- return isolate->InContext() ? GetByV8Context(isolate->GetCurrentContext())
- : nullptr;
- }
- ScriptContext* ScriptContextSet::GetByV8Context(
- const v8::Local<v8::Context>& v8_context) const {
- for (ScriptContext* script_context : contexts_) {
- if (script_context->v8_context() == v8_context)
- return script_context;
- }
- return nullptr;
- }
- ScriptContext* ScriptContextSet::GetContextByObject(
- const v8::Local<v8::Object>& object) {
- v8::Local<v8::Context> context;
- if (!object->GetCreationContext().ToLocal(&context))
- return nullptr;
- return GetContextByV8Context(context);
- }
- ScriptContext* ScriptContextSet::GetContextByV8Context(
- const v8::Local<v8::Context>& v8_context) {
- // g_context_set can be null in unittests.
- return g_context_set ? g_context_set->GetByV8Context(v8_context) : nullptr;
- }
- ScriptContext* ScriptContextSet::GetMainWorldContextForFrame(
- content::RenderFrame* render_frame) {
- v8::HandleScope handle_scope(blink::MainThreadIsolate());
- return GetContextByV8Context(
- render_frame->GetWebFrame()->MainWorldScriptContext());
- }
- void ScriptContextSet::ForEach(
- const std::string& extension_id,
- content::RenderFrame* render_frame,
- const base::RepeatingCallback<void(ScriptContext*)>& callback) {
- // We copy the context list, because calling into javascript may modify it
- // out from under us.
- std::set<ScriptContext*> contexts_copy = contexts_;
- for (ScriptContext* context : contexts_copy) {
- // For the same reason as above, contexts may become invalid while we run.
- if (!context->is_valid())
- continue;
- if (!extension_id.empty()) {
- const Extension* extension = context->extension();
- if (!extension || (extension_id != extension->id()))
- continue;
- }
- content::RenderFrame* context_render_frame = context->GetRenderFrame();
- if (render_frame && render_frame != context_render_frame)
- continue;
- callback.Run(context);
- }
- }
- void ScriptContextSet::OnExtensionUnloaded(const std::string& extension_id) {
- ScriptContextSetIterable::ForEach(
- extension_id,
- base::BindRepeating(&ScriptContextSet::Remove, base::Unretained(this)));
- }
- void ScriptContextSet::AddForTesting(std::unique_ptr<ScriptContext> context) {
- contexts_.insert(context.release()); // Takes ownership
- }
- const Extension* ScriptContextSet::GetExtensionFromFrameAndWorld(
- blink::WebLocalFrame* frame,
- int32_t world_id,
- bool use_effective_url) {
- std::string extension_id;
- if (world_id != 0) {
- // Isolated worlds (content script).
- extension_id = ScriptInjection::GetHostIdForIsolatedWorld(world_id);
- } else {
- // For looking up the extension associated with this frame, we either want
- // to use the current url or possibly the data source url (which this frame
- // may be navigating to shortly), depending on the security origin of the
- // frame. We don't always want to use the data source url because some
- // frames (eg iframes and windows created via window.open) briefly contain
- // an about:blank script context that is scriptable by their parent/opener
- // before they finish navigating.
- GURL frame_url = ScriptContext::GetAccessCheckedFrameURL(frame);
- frame_url = ScriptContext::GetEffectiveDocumentURLForContext(
- frame, frame_url, use_effective_url);
- extension_id =
- RendererExtensionRegistry::Get()->GetExtensionOrAppIDByURL(frame_url);
- }
- // There are conditions where despite a context being associated with an
- // extension, no extension actually gets found. Ignore "invalid" because CSP
- // blocks extension page loading by switching the extension ID to "invalid".
- const Extension* extension =
- RendererExtensionRegistry::Get()->GetByID(extension_id);
- if (!extension && !extension_id.empty() && extension_id != "invalid") {
- // TODO(kalman): Do something here?
- }
- return extension;
- }
- Feature::Context ScriptContextSet::ClassifyJavaScriptContext(
- const Extension* extension,
- int32_t world_id,
- const GURL& url,
- const blink::WebSecurityOrigin& origin,
- mojom::ViewType view_type) {
- // WARNING: This logic must match ProcessMap::GetContextType, as much as
- // possible.
- // Worlds not within this range are not for content scripts, so ignore them.
- // TODO(devlin): Isolated worlds with a non-zero id could belong to
- // chrome-internal pieces, like dom distiller and translate. Do we need any
- // bindings (even those for basic web pages) for those?
- if (world_id >= ExtensionsRendererClient::Get()->GetLowestIsolatedWorldId()) {
- return extension ? // TODO(kalman): when does this happen?
- Feature::CONTENT_SCRIPT_CONTEXT
- : Feature::UNSPECIFIED_CONTEXT;
- }
- // We have an explicit check for sandboxed pages before checking whether the
- // extension is active in this process because:
- // 1. Sandboxed pages run in the same process as regular extension pages, so
- // the extension is considered active.
- // 2. ScriptContext creation (which triggers bindings injection) happens
- // before the SecurityContext is updated with the sandbox flags (after
- // reading the CSP header), so the caller can't check if the context's
- // security origin is unique yet.
- if (ScriptContext::IsSandboxedPage(url))
- return Feature::WEB_PAGE_CONTEXT;
- if (extension && active_extension_ids_->count(extension->id()) > 0) {
- // |extension| is active in this process, but it could be either a true
- // extension process or within the extent of a hosted app. In the latter
- // case this would usually be considered a (blessed) web page context,
- // unless the extension in question is a component extension, in which case
- // we cheat and call it blessed.
- if (extension->is_hosted_app() &&
- extension->location() != mojom::ManifestLocation::kComponent) {
- return Feature::BLESSED_WEB_PAGE_CONTEXT;
- }
- if (is_lock_screen_context_)
- return Feature::LOCK_SCREEN_EXTENSION_CONTEXT;
- if (view_type == mojom::ViewType::kOffscreenDocument)
- return Feature::OFFSCREEN_EXTENSION_CONTEXT;
- return Feature::BLESSED_EXTENSION_CONTEXT;
- }
- // None of the following feature types should ever be present in an
- // offscreen document.
- DCHECK_NE(mojom::ViewType::kOffscreenDocument, view_type);
- // TODO(kalman): This IsOpaque() check is wrong, it should be performed as
- // part of ScriptContext::IsSandboxedPage().
- if (!origin.IsOpaque() &&
- RendererExtensionRegistry::Get()->ExtensionBindingsAllowed(url)) {
- if (!extension) // TODO(kalman): when does this happen?
- return Feature::UNSPECIFIED_CONTEXT;
- return extension->is_hosted_app() ? Feature::BLESSED_WEB_PAGE_CONTEXT
- : Feature::UNBLESSED_EXTENSION_CONTEXT;
- }
- if (!url.is_valid())
- return Feature::UNSPECIFIED_CONTEXT;
- if (url.SchemeIs(content::kChromeUIScheme))
- return Feature::WEBUI_CONTEXT;
- if (url.SchemeIs(content::kChromeUIUntrustedScheme))
- return Feature::WEBUI_UNTRUSTED_CONTEXT;
- return Feature::WEB_PAGE_CONTEXT;
- }
- } // namespace extensions
|