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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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 "LoginDetectionService.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/StaticPrefs_fission.h"
#include "mozilla/dom/ProcessIsolation.h"
#include "nsILoginInfo.h"
#include "nsILoginManager.h"
#include "nsIObserver.h"
#include "nsIXULRuntime.h"
#include "nsServiceManagerUtils.h"
#include "nsXULAppAPI.h"
namespace mozilla::dom {
static StaticRefPtr<LoginDetectionService> gLoginDetectionService;
namespace {
void OnFissionPrefsChange(const char* aPrefName, void* aData) {
MOZ_ASSERT(gLoginDetectionService);
gLoginDetectionService->MaybeStartMonitoring();
}
} // namespace
NS_IMPL_ISUPPORTS(LoginDetectionService, nsILoginDetectionService,
nsILoginSearchCallback, nsIObserver, nsISupportsWeakReference)
// static
already_AddRefed<LoginDetectionService> LoginDetectionService::GetSingleton() {
if (gLoginDetectionService) {
return do_AddRef(gLoginDetectionService);
}
gLoginDetectionService = new LoginDetectionService();
ClearOnShutdown(&gLoginDetectionService);
return do_AddRef(gLoginDetectionService);
}
LoginDetectionService::LoginDetectionService() : mIsLoginsLoaded(false) {}
LoginDetectionService::~LoginDetectionService() { UnregisterObserver(); }
void LoginDetectionService::MaybeStartMonitoring() {
if (IsIsolateHighValueSiteEnabled()) {
// We want to isolate sites with a saved password, so fetch saved logins
// from the password manager, and then add the 'HighValue' permission.
// Note that we don't monitor whether a login is added or removed after
// logins are fetched. For adding logins, this will be covered by form
// submission detection heuristic. As for removing logins, it doesn't
// provide security benefit just to NOT isolate the removed site. The site
// will not be isolated when its permission expired.
FetchLogins();
}
if (IsIsolateHighValueSiteEnabled() ||
StaticPrefs::fission_highValue_login_monitor()) {
// When the pref is on, we monitor users' login attempt event when we
// are not isolating high value sites. This is because We can't detect the
// case where a user is already logged in to a site, and don't save a
// password for it. So we want to start monitoring login attempts prior
// to releasing the feature.
if (!mObs) {
mObs = mozilla::services::GetObserverService();
mObs->AddObserver(this, "passwordmgr-form-submission-detected", false);
}
} else {
UnregisterObserver();
}
}
void LoginDetectionService::FetchLogins() {
nsresult rv;
nsCOMPtr<nsILoginManager> loginManager =
do_GetService(NS_LOGINMANAGER_CONTRACTID, &rv);
if (NS_WARN_IF(!loginManager)) {
return;
}
(void)loginManager->GetAllLoginsWithCallback(this);
}
void LoginDetectionService::UnregisterObserver() {
if (mObs) {
mObs->RemoveObserver(this, "passwordmgr-form-submission-detected");
mObs = nullptr;
}
}
///////////////////////////////////////////////////////////////////////////////
// nsILoginDetectionService implementation
NS_IMETHODIMP LoginDetectionService::Init() {
if (XRE_IsContentProcess()) {
return NS_OK;
}
Preferences::RegisterCallback(OnFissionPrefsChange, "fission.autostart");
Preferences::RegisterCallback(OnFissionPrefsChange,
"fission.webContentIsolationStrategy");
MaybeStartMonitoring();
return NS_OK;
}
NS_IMETHODIMP LoginDetectionService::IsLoginsLoaded(bool* aResult) {
if (IsIsolateHighValueSiteEnabled()) {
*aResult = mIsLoginsLoaded;
} else {
// When the feature is disabled, just returns true so testcases don't
// block on waiting for us to load logins.
*aResult = true;
}
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////
// nsILoginSearchObserver implementation
NS_IMETHODIMP
LoginDetectionService::OnSearchComplete(
const nsTArray<RefPtr<nsILoginInfo>>& aLogins) {
// Add all origins with saved passwords to the permission manager.
for (const auto& login : aLogins) {
nsString origin;
login->GetOrigin(origin);
AddHighValuePermission(NS_ConvertUTF16toUTF8(origin),
mozilla::dom::kHighValueHasSavedLoginPermission);
}
mIsLoginsLoaded = true;
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////
// nsIObserver implementation
NS_IMETHODIMP
LoginDetectionService::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
if ("passwordmgr-form-submission-detected"_ns.Equals(aTopic)) {
nsDependentString origin(aData);
AddHighValuePermission(NS_ConvertUTF16toUTF8(origin),
mozilla::dom::kHighValueIsLoggedInPermission);
}
return NS_OK;
}
} // namespace mozilla::dom
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