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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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 "CheckPermissionsHelper.h"
#include "nsIDOMWindow.h"
#include "nsILoadContext.h"
#include "nsIWebNavigation.h"
#include "nsIObserverService.h"
#include "nsIPermissionManager.h"
#include "nsIPrincipal.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIURI.h"
#include "nsContentUtils.h"
#include "nsDOMStorage.h"
#include "nsNetUtil.h"
#include "nsThreadUtils.h"
#include "mozilla/Services.h"
#include "mozilla/Preferences.h"
#include "IndexedDatabaseManager.h"
#define PERMISSION_INDEXEDDB "indexedDB"
#define PREF_INDEXEDDB_ENABLED "dom.indexedDB.enabled"
#define TOPIC_PERMISSIONS_PROMPT "indexedDB-permissions-prompt"
#define TOPIC_PERMISSIONS_RESPONSE "indexedDB-permissions-response"
// This is a little confusing, but our default behavior (UNKNOWN_ACTION) is to
// allow access without a prompt. If the "indexedDB" permission is set to
// ALLOW_ACTION then we will issue a prompt before allowing access. Otherwise
// (DENY_ACTION) we deny access.
#define PERMISSION_ALLOWED nsIPermissionManager::UNKNOWN_ACTION
#define PERMISSION_DENIED nsIPermissionManager::DENY_ACTION
#define PERMISSION_PROMPT nsIPermissionManager::ALLOW_ACTION
using namespace mozilla;
USING_INDEXEDDB_NAMESPACE
using namespace mozilla::services;
namespace {
inline
uint32_t
GetIndexedDBPermissions(nsIDOMWindow* aWindow)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!Preferences::GetBool(PREF_INDEXEDDB_ENABLED)) {
return PERMISSION_DENIED;
}
// No window here means chrome access.
if (!aWindow) {
return PERMISSION_ALLOWED;
}
nsCOMPtr<nsIScriptObjectPrincipal> sop(do_QueryInterface(aWindow));
NS_ENSURE_TRUE(sop, nsIPermissionManager::DENY_ACTION);
if (nsContentUtils::IsSystemPrincipal(sop->GetPrincipal())) {
return PERMISSION_ALLOWED;
}
nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(aWindow);
nsCOMPtr<nsILoadContext> loadContext = do_QueryInterface(webNav);
if (loadContext && loadContext->UsePrivateBrowsing()) {
// TODO Support private browsing indexedDB?
NS_WARNING("IndexedDB may not be used while in private browsing mode!");
return PERMISSION_DENIED;
}
nsCOMPtr<nsIPermissionManager> permissionManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
NS_ENSURE_TRUE(permissionManager, PERMISSION_DENIED);
uint32_t permission;
nsresult rv =
permissionManager->TestPermissionFromPrincipal(sop->GetPrincipal(),
PERMISSION_INDEXEDDB,
&permission);
NS_ENSURE_SUCCESS(rv, PERMISSION_DENIED);
return permission;
}
} // anonymous namespace
NS_IMPL_THREADSAFE_ISUPPORTS3(CheckPermissionsHelper, nsIRunnable,
nsIInterfaceRequestor,
nsIObserver)
NS_IMETHODIMP
CheckPermissionsHelper::Run()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
uint32_t permission = mHasPrompted ?
mPromptResult :
GetIndexedDBPermissions(mWindow);
nsresult rv;
if (mHasPrompted) {
// Add permissions to the database, but only if we are in the parent
// process (if we are in the child process, we have already
// set the permission when the prompt was shown in the parent, as
// we cannot set the permission from the child).
if (permission != PERMISSION_PROMPT &&
IndexedDatabaseManager::IsMainProcess()) {
nsCOMPtr<nsIPermissionManager> permissionManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
NS_ENSURE_STATE(permissionManager);
nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(mWindow);
NS_ENSURE_TRUE(sop, NS_ERROR_FAILURE);
rv = permissionManager->AddFromPrincipal(sop->GetPrincipal(),
PERMISSION_INDEXEDDB, permission,
nsIPermissionManager::EXPIRE_NEVER,
0);
NS_ENSURE_SUCCESS(rv, rv);
}
}
else if (permission == PERMISSION_PROMPT && mPromptAllowed) {
nsCOMPtr<nsIObserverService> obs = GetObserverService();
rv = obs->NotifyObservers(static_cast<nsIRunnable*>(this),
TOPIC_PERMISSIONS_PROMPT, nullptr);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsRefPtr<OpenDatabaseHelper> helper;
helper.swap(mHelper);
nsCOMPtr<nsIDOMWindow> window;
window.swap(mWindow);
if (permission == PERMISSION_ALLOWED) {
IndexedDatabaseManager* mgr = IndexedDatabaseManager::Get();
NS_ASSERTION(mgr, "This should never be null!");
return helper->Dispatch(mgr->IOThread());
}
NS_ASSERTION(permission == PERMISSION_PROMPT ||
permission == PERMISSION_DENIED,
"Unknown permission!");
helper->SetError(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
return helper->RunImmediately();
}
NS_IMETHODIMP
CheckPermissionsHelper::GetInterface(const nsIID& aIID,
void** aResult)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (aIID.Equals(NS_GET_IID(nsIObserver))) {
return QueryInterface(aIID, aResult);
}
if (aIID.Equals(NS_GET_IID(nsIDOMWindow))) {
return mWindow->QueryInterface(aIID, aResult);
}
*aResult = nullptr;
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
CheckPermissionsHelper::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!strcmp(aTopic, TOPIC_PERMISSIONS_RESPONSE), "Bad topic!");
NS_ASSERTION(mPromptAllowed, "How did we get here?");
mHasPrompted = true;
nsresult rv;
uint32_t promptResult = nsDependentString(aData).ToInteger(&rv);
NS_ENSURE_SUCCESS(rv, rv);
// Have to convert the permission we got from the user to our weird reversed
// permission type.
switch (promptResult) {
case nsIPermissionManager::ALLOW_ACTION:
mPromptResult = PERMISSION_ALLOWED;
break;
case nsIPermissionManager::DENY_ACTION:
mPromptResult = PERMISSION_DENIED;
break;
case nsIPermissionManager::UNKNOWN_ACTION:
mPromptResult = PERMISSION_PROMPT;
break;
default:
NS_NOTREACHED("Unknown permission type!");
mPromptResult = PERMISSION_DENIED;
}
rv = NS_DispatchToCurrentThread(this);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
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