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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
namespace Piwik\Plugins\TwoFactorAuth;
use Piwik\Piwik;
use Piwik\Plugins\TwoFactorAuth\Dao\RecoveryCodeDao;
use Piwik\Plugins\TwoFactorAuth\Dao\TwoFaSecretRandomGenerator;
use Piwik\Plugins\UsersManager\Model;
use Exception;
require_once PIWIK_DOCUMENT_ROOT . '/libs/Authenticator/TwoFactorAuthenticator.php';
class TwoFactorAuthentication
{
/**
* @var SystemSettings
*/
private $settings;
/**
* @var RecoveryCodeDao
*/
private $recoveryCodeDao;
/**
* @var TwoFaSecretRandomGenerator
*/
private $secretGenerator;
public function __construct(SystemSettings $systemSettings, RecoveryCodeDao $recoveryCodeDao, TwoFaSecretRandomGenerator $twoFaSecretRandomGenerator)
{
$this->settings = $systemSettings;
$this->recoveryCodeDao = $recoveryCodeDao;
$this->secretGenerator = $twoFaSecretRandomGenerator;
}
private function getUserModel()
{
return new Model();
}
public function generateSecret()
{
return $this->secretGenerator->generateSecret();
}
public function disable2FAforUser($login)
{
$this->saveSecret($login, '');
$this->recoveryCodeDao->deleteAllRecoveryCodesForLogin($login);
Piwik::postEvent('TwoFactorAuth.disabled', array($login));
}
private function isAnonymous($login)
{
return strtolower($login) === 'anonymous';
}
public function saveSecret($login, $secret)
{
if ($this->isAnonymous($login)) {
throw new Exception('Anonymous cannot use two-factor authentication');
}
if (!empty($secret) && !$this->recoveryCodeDao->getAllRecoveryCodesForLogin($login)) {
// ensures the user has seen and ideally backuped the recovery codes... we don't create them here on demand
throw new Exception('Cannot enable two-factor authentication, no recovery codes have been created');
}
$model = $this->getUserModel();
$model->updateUserFields($login, array('twofactor_secret' => $secret));
}
public function isUserRequiredToHaveTwoFactorEnabled()
{
return $this->settings->twoFactorAuthRequired->getValue();
}
public function isUserUsingTwoFactorAuthentication($login)
{
if ($this->isAnonymous($login)) {
return false; // not possible to use auth code with anonymous
}
$user = $this->getUser($login);
return !empty($user['twofactor_secret']);
}
private function getUser($login)
{
$model = $this->getUserModel();
return $model->getUser($login);
}
public function validateAuthCode($login, $authCode)
{
if (!$this->isUserUsingTwoFactorAuthentication($login)) {
return false;
}
$user = $this->getUser($login);
if (!empty($user['twofactor_secret'])
&& $this->validateAuthCodeDuringSetup($authCode, $user['twofactor_secret'])) {
return true;
}
if ($this->recoveryCodeDao->useRecoveryCode($user['login'], $authCode)) {
return true;
}
return false;
}
public function validateAuthCodeDuringSetup($authCode, $secret)
{
$twoFactorAuth = $this->makeAuthenticator();
if (!empty($secret) && $twoFactorAuth->verifyCode($secret, $authCode, 2)) {
return true;
}
return false;
}
private function makeAuthenticator()
{
return new \TwoFactorAuthenticator();
}
}
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