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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/active_tab_permission_granter.h"
#include "chrome/browser/extensions/extension_action_runner.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/process_manager.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/feature_switch.h"
#include "extensions/common/permissions/permission_set.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/common/user_script.h"
#include "url/gurl.h"
namespace extensions {
namespace {
using CreateMessageFunction = base::Callback<IPC::Message*(bool)>;
// Creates a new IPC message for updating tab-specific permissions.
IPC::Message* CreateUpdateMessage(const GURL& visible_url,
const std::string& extension_id,
const URLPatternSet& new_hosts,
int tab_id,
bool update_whitelist) {
return new ExtensionMsg_UpdateTabSpecificPermissions(
visible_url, extension_id, new_hosts, update_whitelist, tab_id);
}
// Creates a new IPC message for clearing tab-specific permissions.
IPC::Message* CreateClearMessage(const std::vector<std::string>& ids,
int tab_id,
bool update_whitelist) {
return new ExtensionMsg_ClearTabSpecificPermissions(
ids, update_whitelist, tab_id);
}
// Sends a message exactly once to each render process host owning one of the
// given |frame_hosts| and |tab_process|. If |tab_process| doesn't own any of
// the |frame_hosts|, it will not be signaled to update its origin whitelist.
void SendMessageToProcesses(
const std::set<content::RenderFrameHost*>& frame_hosts,
content::RenderProcessHost* tab_process,
const CreateMessageFunction& create_message) {
std::set<content::RenderProcessHost*> sent_to_hosts;
for (content::RenderFrameHost* frame_host : frame_hosts) {
content::RenderProcessHost* process_host = frame_host->GetProcess();
if (sent_to_hosts.count(process_host) == 0) {
// Extension processes have to update the origin whitelists.
process_host->Send(create_message.Run(true));
sent_to_hosts.insert(frame_host->GetProcess());
}
}
// If the tab wasn't one of those processes already updated (it likely
// wasn't), update it. Tabs don't need to update the origin whitelist.
if (sent_to_hosts.count(tab_process) == 0)
tab_process->Send(create_message.Run(false));
}
} // namespace
ActiveTabPermissionGranter::ActiveTabPermissionGranter(
content::WebContents* web_contents,
int tab_id,
Profile* profile)
: content::WebContentsObserver(web_contents),
tab_id_(tab_id),
extension_registry_observer_(this) {
extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
}
ActiveTabPermissionGranter::~ActiveTabPermissionGranter() {}
void ActiveTabPermissionGranter::GrantIfRequested(const Extension* extension) {
if (granted_extensions_.Contains(extension->id()))
return;
APIPermissionSet new_apis;
URLPatternSet new_hosts;
const PermissionsData* permissions_data = extension->permissions_data();
// If the extension requested all-hosts but has had it withheld, we grant it
// active tab-style permissions, even if it doesn't have the activeTab
// permission in the manifest.
if (permissions_data->HasAPIPermission(APIPermission::kActiveTab) ||
permissions_data->HasWithheldImpliedAllHosts()) {
new_hosts.AddOrigin(UserScript::ValidUserScriptSchemes(),
web_contents()->GetVisibleURL().GetOrigin());
new_apis.insert(APIPermission::kTab);
}
if (permissions_data->HasAPIPermission(APIPermission::kTabCapture))
new_apis.insert(APIPermission::kTabCaptureForTab);
if (!new_apis.empty() || !new_hosts.is_empty()) {
granted_extensions_.Insert(extension);
PermissionSet new_permissions(new_apis, ManifestPermissionSet(), new_hosts,
URLPatternSet());
permissions_data->UpdateTabSpecificPermissions(tab_id_, new_permissions);
const content::NavigationEntry* navigation_entry =
web_contents()->GetController().GetVisibleEntry();
if (navigation_entry) {
// We update all extension render views with the new tab permissions, and
// also the tab itself.
CreateMessageFunction update_message =
base::Bind(&CreateUpdateMessage,
navigation_entry->GetURL(),
extension->id(),
new_hosts,
tab_id_);
SendMessageToProcesses(
ProcessManager::Get(web_contents()->GetBrowserContext())->
GetRenderFrameHostsForExtension(extension->id()),
web_contents()->GetRenderProcessHost(),
update_message);
// If more things ever need to know about this, we should consider making
// an observer class.
// It's important that this comes after the IPC is sent to the renderer,
// so that any tasks executing in the renderer occur after it has the
// updated permissions.
ExtensionActionRunner::GetForWebContents(web_contents())
->OnActiveTabPermissionGranted(extension);
}
}
}
void ActiveTabPermissionGranter::RevokeForTesting() {
ClearActiveExtensionsAndNotify();
}
void ActiveTabPermissionGranter::DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) {
if (details.is_in_page)
return;
DCHECK(details.is_main_frame); // important: sub-frames don't get granted!
// Only clear the granted permissions for cross-origin navigations.
//
// See http://crbug.com/404243 for why. Currently we only differentiate
// between same-origin and cross-origin navigations when the
// script-require-action flag is on. It's not clear it's good for general
// activeTab consumption (we likely need to build some UI around it first).
// However, the scripts-require-action feature is all-but unusable without
// this behaviour.
if (FeatureSwitch::scripts_require_action()->IsEnabled()) {
const content::NavigationEntry* navigation_entry =
web_contents()->GetController().GetVisibleEntry();
if (!navigation_entry || (navigation_entry->GetURL().GetOrigin() !=
details.previous_url.GetOrigin())) {
ClearActiveExtensionsAndNotify();
}
} else {
ClearActiveExtensionsAndNotify();
}
}
void ActiveTabPermissionGranter::WebContentsDestroyed() {
ClearActiveExtensionsAndNotify();
}
void ActiveTabPermissionGranter::OnExtensionUnloaded(
content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) {
// Note: don't need to clear the permissions (nor tell the renderer about it)
// because it's being unloaded anyway.
granted_extensions_.Remove(extension->id());
}
void ActiveTabPermissionGranter::ClearActiveExtensionsAndNotify() {
if (granted_extensions_.is_empty())
return;
std::set<content::RenderFrameHost*> frame_hosts;
std::vector<std::string> extension_ids;
ProcessManager* process_manager =
ProcessManager::Get(web_contents()->GetBrowserContext());
for (const scoped_refptr<const Extension>& extension : granted_extensions_) {
extension->permissions_data()->ClearTabSpecificPermissions(tab_id_);
extension_ids.push_back(extension->id());
std::set<content::RenderFrameHost*> extension_frame_hosts =
process_manager->GetRenderFrameHostsForExtension(extension->id());
frame_hosts.insert(extension_frame_hosts.begin(),
extension_frame_hosts.end());
}
CreateMessageFunction clear_message =
base::Bind(&CreateClearMessage, extension_ids, tab_id_);
SendMessageToProcesses(frame_hosts,
web_contents()->GetRenderProcessHost(),
clear_message);
granted_extensions_.Clear();
}
} // namespace extensions
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