src/Security/Authentication.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Security;
  23
  24 use Exception;
  25 use Friendica\App;
  26 use Friendica\Core\Config\IConfig;
  27 use Friendica\Core\PConfig\IPConfig;
  28 use Friendica\Core\Hook;
  29 use Friendica\Core\Session;
  30 use Friendica\Core\System;
  31 use Friendica\Database\Database;
  32 use Friendica\Database\DBA;
  33 use Friendica\DI;
  34 use Friendica\Model\User;
  35 use Friendica\Network\HTTPException;
  36 use Friendica\Security\TwoFactor\Repository\TrustedBrowser;
  37 use Friendica\Util\DateTimeFormat;
  38 use Friendica\Util\Network;
  39 use Friendica\Util\Strings;
  40 use LightOpenID;
  41 use Friendica\Core\L10n;
  42 use Friendica\Core\Logger;
  43 use Psr\Log\LoggerInterface;
  44
  45 /**
  46  * Handle Authentication, Session and Cookies
  47  */
  48 class Authentication
  49 {
  50         /** @var IConfig */
  51         private $config;
  52         /** @var App\Mode */
  53         private $mode;
  54         /** @var App\BaseURL */
  55         private $baseUrl;
  56         /** @var L10n */
  57         private $l10n;
  58         /** @var Database */
  59         private $dba;
  60         /** @var LoggerInterface */
  61         private $logger;
  62         /** @var User\Cookie */
  63         private $cookie;
  64         /** @var Session\ISession */
  65         private $session;
  66         /** @var IPConfig */
  67         private $pConfig;
  68
  69         /**
  70          * Authentication constructor.
  71          *
  72          * @param IConfig          $config
  73          * @param App\Mode         $mode
  74          * @param App\BaseURL      $baseUrl
  75          * @param L10n             $l10n
  76          * @param Database         $dba
  77          * @param LoggerInterface  $logger
  78          * @param User\Cookie      $cookie
  79          * @param Session\ISession $session
  80          * @param IPConfig         $pConfig
  81          */
  82         public function __construct(IConfig $config, App\Mode $mode, App\BaseURL $baseUrl, L10n $l10n, Database $dba, LoggerInterface $logger, User\Cookie $cookie, Session\ISession $session, IPConfig $pConfig)
  83         {
  84                 $this->config  = $config;
  85                 $this->mode    = $mode;
  86                 $this->baseUrl = $baseUrl;
  87                 $this->l10n    = $l10n;
  88                 $this->dba     = $dba;
  89                 $this->logger  = $logger;
  90                 $this->cookie  = $cookie;
  91                 $this->session = $session;
  92                 $this->pConfig = $pConfig;
  93         }
  94
  95         /**
  96          * Tries to auth the user from the cookie or session
  97          *
  98          * @param App   $a      The Friendica Application context
  99          *
 100          * @throws HttpException\InternalServerErrorException In case of Friendica internal exceptions
 101          * @throws Exception In case of general exceptions (like SQL Grammar)
 102          */
 103         public function withSession(App $a)
 104         {
 105                 // When the "Friendica" cookie is set, take the value to authenticate and renew the cookie.
 106                 if ($this->cookie->get('uid')) {
 107                         $user = $this->dba->selectFirst(
 108                                 'user',
 109                                 [],
 110                                 [
 111                                         'uid'             => $this->cookie->get('uid'),
 112                                         'blocked'         => false,
 113                                         'account_expired' => false,
 114                                         'account_removed' => false,
 115                                         'verified'        => true,
 116                                 ]
 117                         );
 118                         if ($this->dba->isResult($user)) {
 119                                 if (!$this->cookie->comparePrivateDataHash($this->cookie->get('hash'),
 120                                         $user['password'] ?? '',
 121                                         $user['prvkey'] ?? '')
 122                                 ) {
 123                                         $this->logger->notice("Hash doesn't fit.", ['user' => $this->cookie->get('uid')]);
 124                                         $this->session->clear();
 125                                         $this->cookie->clear();
 126                                         $this->baseUrl->redirect();
 127                                 }
 128
 129                                 // Renew the cookie
 130                                 $this->cookie->send();
 131
 132                                 // Do the authentification if not done by now
 133                                 if (!$this->session->get('authenticated')) {
 134                                         $this->setForUser($a, $user);
 135
 136                                         if ($this->config->get('system', 'paranoia')) {
 137                                                 $this->session->set('addr', $this->cookie->get('ip'));
 138                                         }
 139                                 }
 140                         }
 141                 }
 142
 143                 if ($this->session->get('authenticated')) {
 144                         if ($this->session->get('visitor_id') && !$this->session->get('uid')) {
 145                                 $contact = $this->dba->selectFirst('contact', [], ['id' => $this->session->get('visitor_id')]);
 146                                 if ($this->dba->isResult($contact)) {
 147                                         $a->contact = $contact;
 148                                 }
 149                         }
 150
 151                         if ($this->session->get('uid')) {
 152                                 // already logged in user returning
 153                                 $check = $this->config->get('system', 'paranoia');
 154                                 // extra paranoia - if the IP changed, log them out
 155                                 if ($check && ($this->session->get('addr') != $_SERVER['REMOTE_ADDR'])) {
 156                                         $this->logger->notice('Session address changed. Paranoid setting in effect, blocking session. ', [
 157                                                         'addr'        => $this->session->get('addr'),
 158                                                         'remote_addr' => $_SERVER['REMOTE_ADDR']]
 159                                         );
 160                                         $this->session->clear();
 161                                         $this->baseUrl->redirect();
 162                                 }
 163
 164                                 $user = $this->dba->selectFirst(
 165                                         'user',
 166                                         [],
 167                                         [
 168                                                 'uid'             => $this->session->get('uid'),
 169                                                 'blocked'         => false,
 170                                                 'account_expired' => false,
 171                                                 'account_removed' => false,
 172                                                 'verified'        => true,
 173                                         ]
 174                                 );
 175                                 if (!$this->dba->isResult($user)) {
 176                                         $this->session->clear();
 177                                         $this->baseUrl->redirect();
 178                                 }
 179
 180                                 // Make sure to refresh the last login time for the user if the user
 181                                 // stays logged in for a long time, e.g. with "Remember Me"
 182                                 $login_refresh = false;
 183                                 if (!$this->session->get('last_login_date')) {
 184                                         $this->session->set('last_login_date', DateTimeFormat::utcNow());
 185                                 }
 186                                 if (strcmp(DateTimeFormat::utc('now - 12 hours'), $this->session->get('last_login_date')) > 0) {
 187                                         $this->session->set('last_login_date', DateTimeFormat::utcNow());
 188                                         $login_refresh = true;
 189                                 }
 190
 191                                 $this->setForUser($a, $user, false, false, $login_refresh);
 192                         }
 193                 }
 194         }
 195
 196         /**
 197          * Attempts to authenticate using OpenId
 198          *
 199          * @param string $openid_url OpenID URL string
 200          * @param bool   $remember   Whether to set the session remember flag
 201          *
 202          * @throws HttpException\InternalServerErrorException In case of Friendica internal exceptions
 203          */
 204         public function withOpenId(string $openid_url, bool $remember)
 205         {
 206                 $noid = $this->config->get('system', 'no_openid');
 207
 208                 // if it's an email address or doesn't resolve to a URL, fail.
 209                 if ($noid || strpos($openid_url, '@') || !Network::isUrlValid($openid_url)) {
 210                         notice($this->l10n->t('Login failed.'));
 211                         $this->baseUrl->redirect();
 212                 }
 213
 214                 // Otherwise it's probably an openid.
 215                 try {
 216                         $openid           = new LightOpenID($this->baseUrl->getHostname());
 217                         $openid->identity = $openid_url;
 218                         $this->session->set('openid', $openid_url);
 219                         $this->session->set('remember', $remember);
 220                         $openid->returnUrl = $this->baseUrl->get(true) . '/openid';
 221                         $openid->optional  = ['namePerson/friendly', 'contact/email', 'namePerson', 'namePerson/first', 'media/image/aspect11', 'media/image/default'];
 222                         System::externalRedirect($openid->authUrl());
 223                 } catch (Exception $e) {
 224                         notice($this->l10n->t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.') . '<br /><br >' . $this->l10n->t('The error message was:') . ' ' . $e->getMessage());
 225                 }
 226         }
 227
 228         /**
 229          * Attempts to authenticate using login/password
 230          *
 231          * @param App    $a        The Friendica Application context
 232          * @param string $username User name
 233          * @param string $password Clear password
 234          * @param bool   $remember Whether to set the session remember flag
 235          *
 236          * @throws HttpException\InternalServerErrorException In case of Friendica internal exceptions
 237          * @throws Exception A general Exception (like SQL Grammar exceptions)
 238          */
 239         public function withPassword(App $a, string $username, string $password, bool $remember)
 240         {
 241                 $record = null;
 242
 243                 try {
 244                         $record = $this->dba->selectFirst(
 245                                 'user',
 246                                 [],
 247                                 ['uid' => User::getIdFromPasswordAuthentication($username, $password)]
 248                         );
 249                 } catch (Exception $e) {
 250                         $this->logger->warning('authenticate: failed login attempt', ['action' => 'login', 'username' => Strings::escapeTags($username), 'ip' => $_SERVER['REMOTE_ADDR']]);
 251                         notice($this->l10n->t('Login failed. Please check your credentials.'));
 252                         $this->baseUrl->redirect();
 253                 }
 254
 255                 if (!$remember) {
 256                         $this->cookie->clear();
 257                 }
 258
 259                 // if we haven't failed up this point, log them in.
 260                 $this->session->set('remember', $remember);
 261                 $this->session->set('last_login_date', DateTimeFormat::utcNow());
 262
 263                 $openid_identity = $this->session->get('openid_identity');
 264                 $openid_server   = $this->session->get('openid_server');
 265
 266                 if (!empty($openid_identity) || !empty($openid_server)) {
 267                         $this->dba->update('user', ['openid' => $openid_identity, 'openidserver' => $openid_server], ['uid' => $record['uid']]);
 268                 }
 269
 270                 $this->setForUser($a, $record, true, true);
 271
 272                 $return_path = $this->session->get('return_path', '');
 273                 $this->session->remove('return_path');
 274
 275                 $this->baseUrl->redirect($return_path);
 276         }
 277
 278         /**
 279          * Sets the provided user's authenticated session
 280          *
 281          * @param App   $a           The Friendica application context
 282          * @param array $user_record The current "user" record
 283          * @param bool  $login_initial
 284          * @param bool  $interactive
 285          * @param bool  $login_refresh
 286          *
 287          * @throws HTTPException\InternalServerErrorException In case of Friendica specific exceptions
 288          * @throws Exception In case of general Exceptions (like SQL Grammar exceptions)
 289          */
 290         public function setForUser(App $a, array $user_record, bool $login_initial = false, bool $interactive = false, bool $login_refresh = false)
 291         {
 292                 $this->session->setMultiple([
 293                         'uid'           => $user_record['uid'],
 294                         'theme'         => $user_record['theme'],
 295                         'mobile-theme'  => $this->pConfig->get($user_record['uid'], 'system', 'mobile_theme'),
 296                         'authenticated' => 1,
 297                         'page_flags'    => $user_record['page-flags'],
 298                         'my_url'        => $this->baseUrl->get() . '/profile/' . $user_record['nickname'],
 299                         'my_address'    => $user_record['nickname'] . '@' . substr($this->baseUrl->get(), strpos($this->baseUrl->get(), '://') + 3),
 300                         'addr'          => ($_SERVER['REMOTE_ADDR'] ?? '') ?: '0.0.0.0'
 301                 ]);
 302
 303                 Session::setVisitorsContacts();
 304
 305                 $member_since = strtotime($user_record['register_date']);
 306                 $this->session->set('new_member', time() < ($member_since + (60 * 60 * 24 * 14)));
 307
 308                 if (strlen($user_record['timezone'])) {
 309                         date_default_timezone_set($user_record['timezone']);
 310                         $a->timezone = $user_record['timezone'];
 311                 }
 312
 313                 $masterUid = $user_record['uid'];
 314
 315                 if ($this->session->get('submanage')) {
 316                         $user = $this->dba->selectFirst('user', ['uid'], ['uid' => $this->session->get('submanage')]);
 317                         if ($this->dba->isResult($user)) {
 318                                 $masterUid = $user['uid'];
 319                         }
 320                 }
 321
 322                 $a->identities = User::identities($masterUid);
 323
 324                 if ($login_initial) {
 325                         $this->logger->info('auth_identities: ' . print_r($a->identities, true));
 326                 }
 327
 328                 if ($login_refresh) {
 329                         $this->logger->info('auth_identities refresh: ' . print_r($a->identities, true));
 330                 }
 331
 332                 $contact = $this->dba->selectFirst('contact', [], ['uid' => $user_record['uid'], 'self' => true]);
 333                 if ($this->dba->isResult($contact)) {
 334                         $a->contact = $contact;
 335                         $a->cid     = $contact['id'];
 336                         $this->session->set('cid', $a->cid);
 337                 }
 338
 339                 header('X-Account-Management-Status: active; name="' . $user_record['username'] . '"; id="' . $user_record['nickname'] . '"');
 340
 341                 if ($login_initial || $login_refresh) {
 342                         $this->dba->update('user', ['login_date' => DateTimeFormat::utcNow()], ['uid' => $user_record['uid']]);
 343
 344                         // Set the login date for all identities of the user
 345                         if (!empty($masterUid)) {
 346                                 $this->dba->update('user', ['login_date' => DateTimeFormat::utcNow()],
 347                                         ['parent-uid' => $masterUid, 'account_removed' => false]);
 348                         }
 349                 }
 350
 351                 if ($login_initial) {
 352                         /*
 353                          * If the user specified to remember the authentication, then set a cookie
 354                          * that expires after one week (the default is when the browser is closed).
 355                          * The cookie will be renewed automatically.
 356                          * The week ensures that sessions will expire after some inactivity.
 357                          */
 358                         if ($this->session->get('remember')) {
 359                                 $this->logger->info('Injecting cookie for remembered user ' . $user_record['nickname']);
 360                                 $this->cookie->setMultiple([
 361                                         'uid'  => $user_record['uid'],
 362                                         'hash' => $this->cookie->hashPrivateData($user_record['password'], $user_record['prvkey']),
 363                                 ]);
 364                                 $this->session->remove('remember');
 365                         }
 366                 }
 367
 368                 $this->redirectForTwoFactorAuthentication($user_record['uid'], $a);
 369
 370                 if ($interactive) {
 371                         if ($user_record['login_date'] <= DBA::NULL_DATETIME) {
 372                                 info($this->l10n->t('Welcome %s', $user_record['username']));
 373                                 info($this->l10n->t('Please upload a profile photo.'));
 374                                 $this->baseUrl->redirect('settings/profile/photo/new');
 375                         }
 376                 }
 377
 378                 $a->user = $user_record;
 379
 380                 if ($login_initial) {
 381                         Hook::callAll('logged_in', $a->user);
 382
 383                         if (DI::module()->getName() !== 'home' && $this->session->exists('return_path')) {
 384                                 $this->baseUrl->redirect($this->session->get('return_path'));
 385                         }
 386                 }
 387         }
 388
 389         /**
 390          * Decides whether to redirect the user to two-factor authentication.
 391          * All return calls in this method skip two-factor authentication
 392          *
 393          * @param int $uid The User Identified
 394          * @param App $a   The Friendica Application context
 395          *
 396          * @throws HTTPException\ForbiddenException In case the two factor authentication is forbidden (e.g. for AJAX calls)
 397          * @throws HTTPException\InternalServerErrorException
 398          */
 399         private function redirectForTwoFactorAuthentication(int $uid, App $a)
 400         {
 401                 // Check user setting, if 2FA disabled return
 402                 if (!$this->pConfig->get($uid, '2fa', 'verified')) {
 403                         return;
 404                 }
 405
 406                 // Check current path, if public or 2fa module return
 407                 if ($a->argc > 0 && in_array($a->argv[0], ['2fa', 'view', 'help', 'api', 'proxy', 'logout'])) {
 408                         return;
 409                 }
 410
 411                 // Case 1a: 2FA session already present: return
 412                 if ($this->session->get('2fa')) {
 413                         return;
 414                 }
 415
 416                 // Case 1b: Check for trusted browser
 417                 if ($this->cookie->get('trusted')) {
 418                         // Retrieve a trusted_browser model based on cookie hash
 419                         $trustedBrowserRepository = new TrustedBrowser($this->dba, $this->logger);
 420                         try {
 421                                 $trustedBrowser = $trustedBrowserRepository->selectOneByHash($this->cookie->get('trusted'));
 422                                 // Verify record ownership
 423                                 if ($trustedBrowser->uid === $uid) {
 424                                         // Update last_used date
 425                                         $trustedBrowser->recordUse();
 426
 427                                         // Save it to the database
 428                                         $trustedBrowserRepository->save($trustedBrowser);
 429
 430                                         // Set 2fa session key and return
 431                                         $this->session->set('2fa', true);
 432
 433                                         return;
 434                                 } else {
 435                                         // Invalid trusted cookie value, removing it
 436                                         $this->cookie->unset('trusted');
 437                                 }
 438                         } catch (\Throwable $e) {
 439                                 // Local trusted browser record was probably removed by the user, we carry on with 2FA
 440                         }
 441                 }
 442
 443                 // Case 2: No valid 2FA session: redirect to code verification page
 444                 if ($this->mode->isAjax()) {
 445                         throw new HTTPException\ForbiddenException();
 446                 } else {
 447                         $this->baseUrl->redirect('2fa');
 448                 }
 449         }
 450 }