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// Copyright (c) 2012 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 "chrome/browser/extensions/api/identity/web_auth_flow.h"
#include <utility>
#include "base/base64.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/trace_event/trace_event.h"
#include "chrome/browser/extensions/component_loader.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/identity_private.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/grit/browser_resources.h"
#include "components/guest_view/browser/guest_view_base.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/resource_request_details.h"
#include "content/public/browser/web_contents.h"
#include "crypto/random.h"
#include "extensions/browser/app_window/app_window.h"
#include "extensions/browser/event_router.h"
#include "extensions/browser/extension_system.h"
#include "net/http/http_response_headers.h"
#include "url/gurl.h"
using content::RenderViewHost;
using content::ResourceRedirectDetails;
using content::WebContents;
using content::WebContentsObserver;
using guest_view::GuestViewBase;
namespace extensions {
namespace identity_private = api::identity_private;
WebAuthFlow::WebAuthFlow(
Delegate* delegate,
Profile* profile,
const GURL& provider_url,
Mode mode)
: delegate_(delegate),
profile_(profile),
provider_url_(provider_url),
mode_(mode),
embedded_window_created_(false) {
TRACE_EVENT_ASYNC_BEGIN0("identity", "WebAuthFlow", this);
}
WebAuthFlow::~WebAuthFlow() {
DCHECK(delegate_ == NULL);
// Stop listening to notifications first since some of the code
// below may generate notifications.
registrar_.RemoveAll();
WebContentsObserver::Observe(nullptr);
if (!app_window_key_.empty()) {
AppWindowRegistry::Get(profile_)->RemoveObserver(this);
if (app_window_ && app_window_->web_contents())
app_window_->web_contents()->Close();
}
TRACE_EVENT_ASYNC_END0("identity", "WebAuthFlow", this);
}
void WebAuthFlow::Start() {
AppWindowRegistry::Get(profile_)->AddObserver(this);
// Attach a random ID string to the window so we can recognize it
// in OnAppWindowAdded.
std::string random_bytes;
crypto::RandBytes(base::WriteInto(&random_bytes, 33), 32);
base::Base64Encode(random_bytes, &app_window_key_);
// identityPrivate.onWebFlowRequest(app_window_key, provider_url_, mode_)
std::unique_ptr<base::ListValue> args(new base::ListValue());
args->AppendString(app_window_key_);
args->AppendString(provider_url_.spec());
if (mode_ == WebAuthFlow::INTERACTIVE)
args->AppendString("interactive");
else
args->AppendString("silent");
std::unique_ptr<Event> event(new Event(
events::IDENTITY_PRIVATE_ON_WEB_FLOW_REQUEST,
identity_private::OnWebFlowRequest::kEventName, std::move(args)));
event->restrict_to_browser_context = profile_;
ExtensionSystem* system = ExtensionSystem::Get(profile_);
extensions::ComponentLoader* component_loader =
system->extension_service()->component_loader();
if (!component_loader->Exists(extension_misc::kIdentityApiUiAppId)) {
component_loader->Add(
IDR_IDENTITY_API_SCOPE_APPROVAL_MANIFEST,
base::FilePath(FILE_PATH_LITERAL("identity_scope_approval_dialog")));
}
EventRouter::Get(profile_)->DispatchEventWithLazyListener(
extension_misc::kIdentityApiUiAppId, std::move(event));
}
void WebAuthFlow::DetachDelegateAndDelete() {
delegate_ = NULL;
base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
}
void WebAuthFlow::OnAppWindowAdded(AppWindow* app_window) {
if (app_window->window_key() == app_window_key_ &&
app_window->extension_id() == extension_misc::kIdentityApiUiAppId) {
app_window_ = app_window;
WebContentsObserver::Observe(app_window->web_contents());
registrar_.Add(
this,
content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
content::NotificationService::AllBrowserContextsAndSources());
}
}
void WebAuthFlow::OnAppWindowRemoved(AppWindow* app_window) {
if (app_window->window_key() == app_window_key_ &&
app_window->extension_id() == extension_misc::kIdentityApiUiAppId) {
app_window_ = NULL;
registrar_.RemoveAll();
WebContentsObserver::Observe(nullptr);
if (delegate_)
delegate_->OnAuthFlowFailure(WebAuthFlow::WINDOW_CLOSED);
}
}
void WebAuthFlow::BeforeUrlLoaded(const GURL& url) {
if (delegate_ && embedded_window_created_)
delegate_->OnAuthFlowURLChange(url);
}
void WebAuthFlow::AfterUrlLoaded() {
if (delegate_ && embedded_window_created_ && mode_ == WebAuthFlow::SILENT)
delegate_->OnAuthFlowFailure(WebAuthFlow::INTERACTION_REQUIRED);
}
void WebAuthFlow::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK_EQ(content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED, type);
DCHECK(app_window_);
if (!delegate_ || embedded_window_created_)
return;
RenderViewHost* render_view(content::Details<RenderViewHost>(details).ptr());
WebContents* web_contents = WebContents::FromRenderViewHost(render_view);
GuestViewBase* guest = GuestViewBase::FromWebContents(web_contents);
WebContents* owner = guest ? guest->owner_web_contents() : nullptr;
if (!web_contents || owner != WebContentsObserver::web_contents())
return;
// Switch from watching the app window to the guest inside it.
embedded_window_created_ = true;
WebContentsObserver::Observe(web_contents);
registrar_.RemoveAll();
}
void WebAuthFlow::RenderProcessGone(base::TerminationStatus status) {
if (delegate_)
delegate_->OnAuthFlowFailure(WebAuthFlow::WINDOW_CLOSED);
}
void WebAuthFlow::DidGetRedirectForResourceRequest(
const content::ResourceRedirectDetails& details) {
BeforeUrlLoaded(details.new_url);
}
void WebAuthFlow::TitleWasSet(content::NavigationEntry* entry,
bool explicit_set) {
if (delegate_)
delegate_->OnAuthFlowTitleChange(base::UTF16ToUTF8(entry->GetTitle()));
}
void WebAuthFlow::DidStopLoading() {
AfterUrlLoaded();
}
void WebAuthFlow::DidStartNavigation(
content::NavigationHandle* navigation_handle) {
if (navigation_handle->IsInMainFrame())
BeforeUrlLoaded(navigation_handle->GetURL());
}
void WebAuthFlow::DidFinishNavigation(
content::NavigationHandle* navigation_handle) {
bool failed = false;
if (navigation_handle->GetNetErrorCode() != net::OK) {
failed = true;
TRACE_EVENT_ASYNC_STEP_PAST1("identity", "WebAuthFlow", this,
"DidFinishNavigationFailure", "error_code",
navigation_handle->GetNetErrorCode());
} else if (navigation_handle->IsInMainFrame() &&
navigation_handle->GetResponseHeaders() &&
navigation_handle->GetResponseHeaders()->response_code() >= 400) {
failed = true;
TRACE_EVENT_ASYNC_STEP_PAST1(
"identity", "WebAuthFlow", this, "DidFinishNavigationFailure",
"response_code",
navigation_handle->GetResponseHeaders()->response_code());
}
if (failed && delegate_)
delegate_->OnAuthFlowFailure(LOAD_FAILED);
}
} // namespace extensions
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