PSFS\base\Security

Complexity

Total Complexity

65

Size/Duplication

Total Lines	486
Duplicated Lines	1.23 %

Coupling/Cohesion

Components	2
Dependencies	6

Test Coverage

Coverage

12.17%

Importance

Changes	15
Bugs	3	Features	1

30 Methods

Rating	Name	Duplication	Size	Complexity
B	__construct()	0	13	6
A	getProfiles()	0	8	1
A	getAdminProfiles()	0	4	1
A	getCleanProfiles()	0	8	1
A	getAdminCleanProfiles()	0	4	1
A	save()	3	11	2
A	saveUser()	0	8	2
A	updateUser()	0	4	1
A	getAdmins()	3	9	2
D	checkAdmin()	0	28	10
A	getAdminFromCookie()	0	10	2
A	getHash()	0	4	1
A	getUser()	0	4	1
A	getAdmin()	0	4	1
A	canAccessRestrictedAdmin()	0	4	2
A	notAuthorized()	0	6	1
A	isSuperAdmin()	0	13	2
A	getSessionKey()	0	9	2
A	setSessionKey()	0	6	1
A	getFlashes()	0	6	2
A	clearFlashes()	0	6	1
A	setFlash()	0	9	2
A	getFlash()	0	6	3
A	updateSession()	0	13	2
A	closeSession()	0	5	1
A	extractTokenParts()	0	16	3
A	extractTsAndMod()	0	13	3
A	decodeToken()	0	11	3
A	generateToken()	0	15	2
A	checkToken()	0	11	3

<?php

namespace PSFS\base;

use PSFS\base\types\SingletonTrait;


/**
 * Class Security
 * @package PSFS
 */
class Security
{
    // sha1('user')
    const USER_ID_TOKEN = '12dea96fec20593566ab75692c9949596833adc9';
    // sha1('admin')
    const MANAGER_ID_TOKEN = 'd033e22ae348aeb5660fc2140aec35850c4da997';
    // sha1('superadmin')
    const ADMIN_ID_TOKEN = '889a3a791b3875cfae413574b53da4bb8a90d53e';
    // sha1('FLASHES')
    const FLASH_MESSAGE_TOKEN = '4680c68435db1bfbf17c3fcc4f7b39d2c6122504';

    use SingletonTrait;
    /**
     * @var array $user
     */
    private $user;

    /**
     * @var array $admin
     */
    private $admin;

    private $authorized = FALSE;

    protected $session;

    /**
     * Constructor por defecto
     */
    public function __construct()
    {
        if (PHP_SESSION_NONE === session_status()) {
            session_start();
        }
        $this->session = (is_null($_SESSION)) ? array() : $_SESSION;
        if (NULL === $this->getSessionKey('__FLASH_CLEAR__')) {
            $this->clearFlashes();
            $this->setSessionKey('__FLASH_CLEAR__', microtime(TRUE));
        }
        $this->user = (array_key_exists(self::USER_ID_TOKEN, $this->session)) ? unserialize($this->session[self::USER_ID_TOKEN]) : NULL;

This line exceeds maximum limit of 120 characters; contains 136 characters

        $this->admin = (array_key_exists(self::ADMIN_ID_TOKEN, $this->session)) ? unserialize($this->session[self::ADMIN_ID_TOKEN]) : NULL;

This line exceeds maximum limit of 120 characters; contains 139 characters

    }

    /**
     * Método estático que devuelve los perfiles de la plataforma
     * @return array
     */
    public static function getProfiles()
    {
        return array(
            self::ADMIN_ID_TOKEN => _('Administrador'),
            self::MANAGER_ID_TOKEN => _('Gestor'),
            self::USER_ID_TOKEN => _('Usuario'),
        );
    }

    /**
     * Method that returns all the available profiles
     * @return array
     */
    public function getAdminProfiles()
    {
        return static::getProfiles();
    }

    /**
     * Método estático que devuelve los perfiles disponibles
     * @return array

Consider making the return type a bit more specific; maybe use array<string,string>.

     */
    public static function getCleanProfiles()
    {
        return array(
            '__SUPER_ADMIN__' => self::ADMIN_ID_TOKEN,
            '__ADMIN__' => self::MANAGER_ID_TOKEN,
            '__USER__' => self::USER_ID_TOKEN,
        );
    }

    /**
     * Método estático que devuelve los perfiles disponibles
     * @return array

Consider making the return type a bit more specific; maybe use array<string,string>.

     */
    public function getAdminCleanProfiles()
    {
        return static::getCleanProfiles();
    }

    /**
     * Método que guarda los administradores
     *
     * @param array $user
     *
     * @return bool
     */
    public static function save($user)
    {
        $admins = array();
        if (file_exists(CONFIG_DIR . DIRECTORY_SEPARATOR . 'admins.json')) {
            $admins = json_decode(file_get_contents(CONFIG_DIR . DIRECTORY_SEPARATOR . 'admins.json'), TRUE);
        }
        $admins[$user['username']]['hash'] = sha1($user['username'] . $user['password']);
        $admins[$user['username']]['profile'] = $user['profile'];

        return (FALSE !== file_put_contents(CONFIG_DIR . DIRECTORY_SEPARATOR . 'admins.json', json_encode($admins, JSON_PRETTY_PRINT)));

This line exceeds maximum limit of 120 characters; contains 136 characters

    }

    /**
     * Method to save a new admin user
     * @param array $user
     * @return bool
     */
    public function saveUser($user)
    {
        $saved = false;
        if (!empty($user)) {
            $saved = static::save($user);
        }
        return $saved;
    }

    /**
     * Servicio que actualiza los datos del usuario
     *
     * @param $user
     */
    public function updateUser($user)
    {
        $this->user = $user;
    }

    /**
     * Método que devuelve los administradores de una plataforma
     * @return array|mixed
     */
    public function getAdmins()
    {
        $admins = array();
        if (file_exists(CONFIG_DIR . DIRECTORY_SEPARATOR . 'admins.json')) {
            $admins = json_decode(file_get_contents(CONFIG_DIR . DIRECTORY_SEPARATOR . 'admins.json'), TRUE);
        }

        return $admins;
    }

    /**
     * Método que devuelve si un usuario tiene privilegios para acceder a la zona de administración
     *
     * @param null $user
     * @param null $pass
     *
     * @return bool
     * @throws \HttpException
     */
    public function checkAdmin($user = NULL, $pass = NULL)
    {
        Logger::log('Checking admin session');
        if (!$this->authorized) {
            $request = Request::getInstance();
            if (!file_exists(CONFIG_DIR . DIRECTORY_SEPARATOR . 'admins.json')) {
                //Si no hay fichero de usuarios redirigimos directamente al gestor
                return Router::getInstance()->getAdmin()->adminers();
            }
            $admins = $this->getAdmins();
            //Sacamos las credenciales de la petición
            $user = $user ?: $request->getServer('PHP_AUTH_USER');
            $pass = $pass ?: $request->getServer('PHP_AUTH_PW');
            if (NULL === $user || (array_key_exists($user, $admins) && empty($admins[$user]))) {
                list($user, $pass) = $this->getAdminFromCookie();
            }
            if (!empty($user) && !empty($admins[$user])) {
                $auth = $admins[$user]['hash'];
                $this->authorized = ($auth == sha1($user . $pass));
                $this->admin = array(
                    'alias' => $user,
                    'profile' => $admins[$user]['profile'],
                );
            }
        }

        return $this->authorized;
    }

    /**
     * Método que obtiene el usuario y contraseña de la cookie de sesión de administración
     * @return array
     */
    protected function getAdminFromCookie()
    {
        $auth_cookie = Request::getInstance()->getCookie($this->getHash());
        $user = $pass = array();
        if (!empty($auth_cookie)) {
            list($user, $pass) = explode(':', base64_decode($auth_cookie));
        }

        return array($user, $pass);
    }

    /**
     * Método privado para la generación del hash de la cookie de administración
     * @return string
     */
    public function getHash()
    {
        return substr(md5('admin'), 0, 8);
    }

    /**
     * Método que devuelve el usuario logado
     * @return array
     */
    public function getUser()
    {
        return $this->user;
    }

    /**
     * Método que devuelve el usuario administrador logado
     * @return array
     */
    public function getAdmin()
    {
        return $this->admin;
    }

    /**
     * Método que calcula si se está logado o para acceder a administración
     * @return bool
     */
    public function canAccessRestrictedAdmin()
    {
        return $this->admin || preg_match('/^\/admin\/login/i', Request::requestUri());
    }

    /**
     * Servicio que devuelve una pantalla de error porque se necesita estar authenticado
     *
     * @param string|null $route
     *
     * @return string|null
     */
    public function notAuthorized($route)
    {
        return Template::getInstance()->render('notauthorized.html.twig', array(
            'route' => $route,
        ));
    }

    /**
     * Servicio que chequea si un usuario es super administrador o no
     * @return bool
     */
    public function isSuperAdmin()
    {
        $users = $this->getAdmins();
        $logged = $this->getAdminFromCookie();
        $profiles = Security::getCleanProfiles();
        if ($users[$logged[0]]) {
            $security = $users[$logged[0]]['profile'];

            return $profiles['__SUPER_ADMIN__'] === $security;
        }

        return FALSE;
    }

    /**
     * Servicio que devuelve un dato de sesión
     *
     * @param string $key
     *
     * @return mixed
     */
    public function getSessionKey($key)
    {
        $data = NULL;
        if (array_key_exists($key, $this->session)) {
            $data = $this->session[$key];
        }

        return $data;
    }

    /**
     * Servicio que setea una variable de sesión
     *
     * @param string $key
     * @param mixed $data
     *
     * @return Security
     */
    public function setSessionKey($key, $data = NULL)
    {
        $this->session[$key] = $data;

        return $this;
    }

    /**
     * Servicio que devuelve los mensajes flash de sesiones
     * @return mixed
     */
    public function getFlashes()
    {
        $flashes = $this->getSessionKey(self::FLASH_MESSAGE_TOKEN);

        return (NULL !== $flashes) ? $flashes : array();
    }

    /**
     * Servicio que limpia los mensajes flash
     * @return $this
     */
    public function clearFlashes()
    {
        $this->setSessionKey(self::FLASH_MESSAGE_TOKEN, NULL);

        return $this;
    }

    /**
     * Servicio que inserta un flash en sesión
     *
     * @param string $key
     * @param mixed $data
     */
    public function setFlash($key, $data = NULL)
    {
        $flashes = $this->getFlashes();
        if (!is_array($flashes)) {
            $flashes = array();
        }
        $flashes[$key] = $data;
        $this->setSessionKey(self::FLASH_MESSAGE_TOKEN, $flashes);
    }

    /**
     * Servicio que devuelve un flash de sesión
     *
     * @param string $key
     *
     * @return mixed
     */
    public function getFlash($key)
    {
        $flashes = $this->getFlashes();

        return (NULL !== $key && array_key_exists($key, $flashes)) ? $flashes[$key] : NULL;
    }

    /**
     * Servicio que actualiza
     *
     * @param boolean $closeSession
     *
     * @return Security
     */
    public function updateSession($closeSession = FALSE)
    {
        Logger::log('Update session');
        $_SESSION = $this->session;
        $_SESSION[self::USER_ID_TOKEN] = serialize($this->user);
        $_SESSION[self::ADMIN_ID_TOKEN] = serialize($this->admin);
        if ($closeSession) {
            Logger::log('Close session');
            session_write_close();
        }
        Logger::log('Session updated');
        return $this;
    }

    /**
     * Servicio que limpia la sesión
     */
    public function closeSession()
    {
        session_destroy();
        session_regenerate_id(TRUE);
    }

    /**
     * Extract parts from token
     * @param string $token
     *
     * @return array

Consider making the return type a bit more specific; maybe use array<double|integer|array>.

     */
    private static function extractTokenParts($token)
    {
        $axis = 0;
        $parts = array();
        try {
            $partLength = floor(strlen($token) / 10);
            for ($i = 0, $ct = ceil(strlen($token) / $partLength); $i < $ct; $i++) {
                $parts[] = substr($token, $axis, $partLength);
                $axis += $partLength;
            }
        } catch (\Exception $e) {
            $partLength = 0;
        }

        return array($partLength, $parts);
    }

    /**
     * Extract Ts and Module from token
     * @param array $parts
     * @param int $partLength
     *
     * @return array

Consider making the return type a bit more specific; maybe use string[].

     */
    private static function extractTsAndMod(array &$parts, $partLength)
    {
        $ts = '';

Avoid variables with short names like $ts. Configured minimum length is 3.

        $mod = '';
        foreach ($parts as &$part) {
            if (strlen($part) == $partLength) {
                $ts .= substr($part, 0, 1);
                $mod .= substr($part, $partLength - 2, 2);
                $part = substr($part, 1, $partLength - 3);
            }
        }
        return array($ts, $mod);
    }

    /**
     * Decode token to check authorized request
     * @param string $token
     * @param string $module
     *
     * @return null|string
     */
    private static function decodeToken($token, $module = 'PSFS')
    {
        $decoded = NULL;
        list($partLength, $parts) = self::extractTokenParts($token);
        list($ts, $mod) = self::extractTsAndMod($parts, $partLength);

Avoid variables with short names like $ts. Configured minimum length is 3.

        $hashMod = substr(strtoupper(sha1($module)), strlen($ts) / 2, strlen($ts) * 2);
        if (time() - (integer)$ts < 300 && $hashMod === $mod) {
            $decoded = implode('', $parts);
        }
        return $decoded;
    }

    /**
     * Generate a authorized token
     * @param string $secret
     * @param string $module
     *
     * @return string
     */
    public static function generateToken($secret, $module = 'PSFS')
    {
        $ts = time();

Avoid variables with short names like $ts. Configured minimum length is 3.

        $hashModule = substr(strtoupper(sha1($module)), strlen($ts) / 2, strlen($ts) * 2);
        $hash = hash('sha256', $secret);
        $insert = floor(strlen($hash) / strlen($ts));
        $j = 0;

Avoid variables with short names like $j. Configured minimum length is 3.

        $token = '';
        for ($i = 0, $ct = strlen($ts); $i < $ct; $i++) {
            $token .= substr($ts, $i, 1) . substr($hash, $j, $insert) . substr($hashModule, $i, 2);
            $j += $insert;
        }
        $token .= substr($hash, ($insert * strlen($ts)), strlen($hash) - ($insert * strlen($ts)));
        return $token;
    }

    /**
     * Checks if auth token is correct
     * @param string $token
     * @param string $secret
     * @param string $module
     *
     * @return bool
     */
    public static function checkToken($token, $secret, $module = 'PSFS')
    {
        if (0 === strlen($token) || 0 === strlen($secret)) {
            return false;
        }
        $module = strtolower($module);
        $decodedToken = self::decodeToken($token, $module);
        $expectedToken = self::decodeToken(self::generateToken($secret, $module), $module);

        return $decodedToken === $expectedToken;
    }

}