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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                declare(strict_types=1);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * balloon  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright   Copryright (c) 2012-2019 gyselroth GmbH (https://gyselroth.com)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license     GPL-3.0 https://opensource.org/licenses/GPL-3.0  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Balloon\App\Idp\Hook;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Balloon\App\Idp\Exception;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Balloon\Hook\AbstractHook;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Balloon\Server\RoleInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Balloon\Server\User;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dolondro\GoogleAuthenticator\Secret;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Dolondro\GoogleAuthenticator\SecretFactory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Micro\Auth\Adapter\Basic\BasicInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Micro\Auth\Identity;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Psr\Log\LoggerInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class MultiFactorAuth extends AbstractHook  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Issuer.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public const ISSUER = 'balloon';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Logger.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var LoggerInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $logger;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Secret factory.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var SecretFactory  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $secret_factory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Secret.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var Secret  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $secret;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Constructor.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct(LoggerInterface $logger, SecretFactory $secret_factory)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->logger = $logger;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->secret_factory = $secret_factory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * {@inheritdoc} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function preUpdateUser(User $user, array &$attributes = []): void  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $existing = $user->getAttributes();  | 
            
                            
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                        if (isset($attributes['multi_factor_auth']) && $attributes['multi_factor_auth'] === true) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $secret = $this->secret_factory->create(self::ISSUER, $user->getUsername());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $attributes['google_auth_secret'] = $secret->getSecretKey();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->secret = $secret;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * {@inheritdoc} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function preDecorateRole(RoleInterface $role, array &$attributes = []): void  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $mfa = $role->getAttributes()['multi_factor_auth'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $attributes['multi_factor_auth'] = $mfa;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($this->secret !== null) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $attributes['multi_factor_uri'] = $this->secret->getUri();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * {@inheritdoc} | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    public function preServerIdentity(Identity $identity, ?User &$user): void  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        if (null === $user || ('/index.php/api/v2/tokens' === $_SERVER['ORIG_SCRIPT_NAME'] && isset($_POST['grant_type']) && $_POST['grant_type'] === 'password_mfa')) { | 
            
            
                                                        
            
                                    
            
            
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                            return;  | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        if ($identity->getAdapter() instanceof BasicInterface && $user->getAttributes()['multi_factor_auth'] === true) { | 
            
                            
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                            throw new Exception\MultiFactorAuthenticationRequired('multi-factor authentication required'); | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        $this->logger->debug('multi-factor authentication is not required for user ['.$user->getId().']', [ | 
            
            
                                                        
            
                                    
            
            
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                            'category' => get_class($this),  | 
            
            
                                                        
            
                                    
            
            
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                        ]);  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.