gecko/dom/ipc/AppProcessChecker.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* 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 "AppProcessChecker.h"
#include "nsIPermissionManager.h"
#ifdef MOZ_CHILD_PERMISSIONS
#include "ContentParent.h"
#include "mozIApplication.h"
#include "mozilla/hal_sandbox/PHalParent.h"
#include "nsIAppsService.h"
#include "nsIPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsPrintfCString.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "TabParent.h"
#include <algorithm>
using namespace mozilla::dom;
using namespace mozilla::hal_sandbox;
using namespace mozilla::services;
#else
namespace mozilla {
namespace dom {
class PContentParent;
}
}
class nsIPrincipal;
#endif
namespace mozilla {
#ifdef MOZ_CHILD_PERMISSIONS
bool
AssertAppProcess(PBrowserParent* aActor,
AssertAppProcessType aType,
const char* aCapability)
{
if (!aActor) {
NS_WARNING("Testing process capability for null actor");
return false;
}
TabParent* tab = static_cast<TabParent*>(aActor);
nsCOMPtr<mozIApplication> app = tab->GetOwnOrContainingApp();
bool aValid = false;
// isBrowser frames inherit their app descriptor to identify their
// data storage, but they don't inherit the capability associated
// with that descriptor.
if (app && (aType == ASSERT_APP_HAS_PERMISSION || !tab->IsBrowserElement())) {
switch (aType) {
case ASSERT_APP_HAS_PERMISSION:
case ASSERT_APP_PROCESS_PERMISSION:
if (!NS_SUCCEEDED(app->HasPermission(aCapability, &aValid))) {
aValid = false;
}
break;
case ASSERT_APP_PROCESS_MANIFEST_URL: {
nsAutoString manifestURL;
if (NS_SUCCEEDED(app->GetManifestURL(manifestURL)) &&
manifestURL.EqualsASCII(aCapability)) {
aValid = true;
}
break;
}
default:
break;
}
}
return aValid;
}
bool
AssertAppStatus(PBrowserParent* aActor,
unsigned short aStatus)
{
if (!aActor) {
NS_WARNING("Testing process capability for null actor");
return false;
}
TabParent* tab = static_cast<TabParent*>(aActor);
nsCOMPtr<mozIApplication> app = tab->GetOwnOrContainingApp();
bool valid = false;
if (app) {
unsigned short appStatus = 0;
if (NS_SUCCEEDED(app->GetAppStatus(&appStatus))) {
valid = appStatus == aStatus;
}
}
return valid;
}
bool
AssertAppProcess(PContentParent* aActor,
AssertAppProcessType aType,
const char* aCapability)
{
const InfallibleTArray<PBrowserParent*>& browsers =
aActor->ManagedPBrowserParent();
for (uint32_t i = 0; i < browsers.Length(); ++i) {
if (AssertAppProcess(browsers[i], aType, aCapability)) {
return true;
}
}
NS_ERROR(
nsPrintfCString(
"Security problem: Content process does not have `%s'. It will be killed.\n",
aCapability).get());
static_cast<ContentParent*>(aActor)->KillHard();
return false;
}
bool
AssertAppStatus(PContentParent* aActor,
unsigned short aStatus)
{
const InfallibleTArray<PBrowserParent*>& browsers =
aActor->ManagedPBrowserParent();
for (uint32_t i = 0; i < browsers.Length(); ++i) {
if (AssertAppStatus(browsers[i], aStatus)) {
return true;
}
}
NS_ERROR(
nsPrintfCString(
"Security problem: Content process does not have `%d' status. It will be killed.",
aStatus).get());
static_cast<ContentParent*>(aActor)->KillHard();
return false;
}
bool
AssertAppProcess(PHalParent* aActor,
AssertAppProcessType aType,
const char* aCapability)
{
return AssertAppProcess(aActor->Manager(), aType, aCapability);
}
bool
AssertAppPrincipal(PContentParent* aActor,
nsIPrincipal* aPrincipal)
{
if (!aPrincipal) {
NS_WARNING("Principal is invalid, killing app process");
static_cast<ContentParent*>(aActor)->KillHard();
return false;
}
uint32_t principalAppId = aPrincipal->GetAppId();
bool inBrowserElement = aPrincipal->GetIsInBrowserElement();
// Check if the permission's appId matches a child we manage.
const InfallibleTArray<PBrowserParent*>& browsers =
aActor->ManagedPBrowserParent();
for (uint32_t i = 0; i < browsers.Length(); ++i) {
TabParent* tab = static_cast<TabParent*>(browsers[i]);
if (tab->OwnOrContainingAppId() == principalAppId) {
// If the child only runs inBrowserElement content and the principal claims
// it's not in a browser element, it's lying.
if (!tab->IsBrowserElement() || inBrowserElement) {
return true;
}
break;
}
}
NS_WARNING("Principal is invalid, killing app process");
static_cast<ContentParent*>(aActor)->KillHard();
return false;
}
already_AddRefed<nsIPrincipal>
GetAppPrincipal(uint32_t aAppId)
{
nsCOMPtr<nsIAppsService> appsService = do_GetService(APPS_SERVICE_CONTRACTID);
nsCOMPtr<mozIApplication> app;
nsresult rv = appsService->GetAppByLocalId(aAppId, getter_AddRefs(app));
NS_ENSURE_SUCCESS(rv, nullptr);
nsString origin;
rv = app->GetOrigin(origin);
NS_ENSURE_SUCCESS(rv, nullptr);
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), origin);
nsCOMPtr<nsIScriptSecurityManager> secMan =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID);
nsCOMPtr<nsIPrincipal> appPrincipal;
rv = secMan->GetAppCodebasePrincipal(uri, aAppId, false,
getter_AddRefs(appPrincipal));
NS_ENSURE_SUCCESS(rv, nullptr);
return appPrincipal.forget();
}
uint32_t
CheckPermission(PContentParent* aActor,
nsIPrincipal* aPrincipal,
const char* aPermission)
{
if (!AssertAppPrincipal(aActor, aPrincipal)) {
return nsIPermissionManager::DENY_ACTION;
}
nsCOMPtr<nsIPermissionManager> pm =
services::GetPermissionManager();
NS_ENSURE_TRUE(pm, nsIPermissionManager::DENY_ACTION);
// Make sure that `aPermission' is an app permission before checking the origin.
nsCOMPtr<nsIPrincipal> appPrincipal = GetAppPrincipal(aPrincipal->GetAppId());
uint32_t appPerm = nsIPermissionManager::UNKNOWN_ACTION;
nsresult rv = pm->TestExactPermissionFromPrincipal(appPrincipal, aPermission, &appPerm);
NS_ENSURE_SUCCESS(rv, nsIPermissionManager::UNKNOWN_ACTION);
// Setting to "deny" in the settings UI should deny everywhere.
if (appPerm == nsIPermissionManager::UNKNOWN_ACTION ||
appPerm == nsIPermissionManager::DENY_ACTION) {
return appPerm;
}
uint32_t permission = nsIPermissionManager::UNKNOWN_ACTION;
rv = pm->TestExactPermissionFromPrincipal(aPrincipal, aPermission, &permission);
NS_ENSURE_SUCCESS(rv, nsIPermissionManager::UNKNOWN_ACTION);
if (permission == nsIPermissionManager::UNKNOWN_ACTION ||
permission == nsIPermissionManager::DENY_ACTION) {
return permission;
}
// For browser content (and if the app hasn't explicitly denied this),
// consider the requesting origin, not the app.
if (appPerm == nsIPermissionManager::PROMPT_ACTION &&
aPrincipal->GetIsInBrowserElement()) {
return permission;
}
// Setting to "prompt" in the settings UI should prompt everywhere in
// non-browser content.
if (appPerm == nsIPermissionManager::PROMPT_ACTION ||
permission == nsIPermissionManager::PROMPT_ACTION) {
return nsIPermissionManager::PROMPT_ACTION;
}
if (appPerm == nsIPermissionManager::ALLOW_ACTION ||
permission == nsIPermissionManager::ALLOW_ACTION) {
return nsIPermissionManager::ALLOW_ACTION;
}
NS_RUNTIMEABORT("Invalid permission value");
return nsIPermissionManager::DENY_ACTION;
}
#else
bool
AssertAppProcess(mozilla::dom::PBrowserParent* aActor,
AssertAppProcessType aType,
const char* aCapability)
{
return true;
}
bool
AssertAppStatus(mozilla::dom::PBrowserParent* aActor,
unsigned short aStatus)
{
return true;
}
bool
AssertAppProcess(mozilla::dom::PContentParent* aActor,
AssertAppProcessType aType,
const char* aCapability)
{
return true;
}
bool
AssertAppStatus(mozilla::dom::PContentParent* aActor,
unsigned short aStatus)
{
return true;
}
bool
AssertAppProcess(mozilla::hal_sandbox::PHalParent* aActor,
AssertAppProcessType aType,
const char* aCapability)
{
return true;
}
bool
AssertAppPrincipal(mozilla::dom::PContentParent* aActor,
nsIPrincipal* aPrincipal)
{
return true;
}
uint32_t
CheckPermission(mozilla::dom::PContentParent* aActor,
nsIPrincipal* aPrincipal,
const char* aPermission)
{
return nsIPermissionManager::ALLOW_ACTION;
}
#endif
} // namespace mozilla