include/auth.php

   1 <?php
   2
   3 use Friendica\App;
   4 use Friendica\Core\System;
   5 use Friendica\Core\Config;
   6 use Friendica\Database\DBM;
   7 use Friendica\Model\User;
   8
   9 require_once 'include/security.php';
  10 require_once 'include/datetime.php';
  11
  12 // When the "Friendica" cookie is set, take the value to authenticate and renew the cookie.
  13 if (isset($_COOKIE["Friendica"])) {
  14         $data = json_decode($_COOKIE["Friendica"]);
  15         if (isset($data->uid)) {
  16                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  17                 FROM `user` WHERE `uid` = %d AND NOT `blocked` AND NOT `account_expired` AND NOT `account_removed` AND `verified` LIMIT 1",
  18                         intval($data->uid)
  19                 );
  20
  21                 if ($r) {
  22                         if ($data->hash != cookie_hash($r[0])) {
  23                                 logger("Hash for user " . $data->uid . " doesn't fit.");
  24                                 nuke_session();
  25                                 goaway(System::baseUrl());
  26                         }
  27
  28                         // Renew the cookie
  29                         // Expires after 7 days by default,
  30                         // can be set via system.auth_cookie_lifetime
  31                         $authcookiedays = Config::get('system', 'auth_cookie_lifetime', 7);
  32                         new_cookie($authcookiedays * 24 * 60 * 60, $r[0]);
  33
  34                         // Do the authentification if not done by now
  35                         if (!isset($_SESSION) || !isset($_SESSION['authenticated'])) {
  36                                 authenticate_success($r[0]);
  37
  38                                 if (Config::get('system', 'paranoia')) {
  39                                         $_SESSION['addr'] = $data->ip;
  40                                 }
  41                         }
  42                 }
  43         }
  44 }
  45
  46
  47 // login/logout
  48
  49 if (isset($_SESSION) && x($_SESSION, 'authenticated') && (!x($_POST, 'auth-params') || ($_POST['auth-params'] !== 'login'))) {
  50         if ((x($_POST, 'auth-params') && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
  51                 // process logout request
  52                 call_hooks("logging_out");
  53                 nuke_session();
  54                 info(t('Logged out.') . EOL);
  55                 goaway(System::baseUrl());
  56         }
  57
  58         if (x($_SESSION, 'visitor_id') && !x($_SESSION, 'uid')) {
  59                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
  60                         intval($_SESSION['visitor_id'])
  61                 );
  62                 if (DBM::is_result($r)) {
  63                         $a->contact = $r[0];
  64                 }
  65         }
  66
  67         if (x($_SESSION, 'uid')) {
  68                 // already logged in user returning
  69                 $check = Config::get('system', 'paranoia');
  70                 // extra paranoia - if the IP changed, log them out
  71                 if ($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
  72                         logger('Session address changed. Paranoid setting in effect, blocking session. ' .
  73                                 $_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
  74                         nuke_session();
  75                         goaway(System::baseUrl());
  76                 }
  77
  78                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  79                 FROM `user` WHERE `uid` = %d AND NOT `blocked` AND NOT `account_expired` AND NOT `account_removed` AND `verified` LIMIT 1",
  80                         intval($_SESSION['uid'])
  81                 );
  82
  83                 if (!DBM::is_result($r)) {
  84                         nuke_session();
  85                         goaway(System::baseUrl());
  86                 }
  87
  88                 // Make sure to refresh the last login time for the user if the user
  89                 // stays logged in for a long time, e.g. with "Remember Me"
  90                 $login_refresh = false;
  91                 if (!x($_SESSION['last_login_date'])) {
  92                         $_SESSION['last_login_date'] = datetime_convert('UTC', 'UTC');
  93                 }
  94                 if (strcmp(datetime_convert('UTC', 'UTC', 'now - 12 hours'), $_SESSION['last_login_date']) > 0) {
  95                         $_SESSION['last_login_date'] = datetime_convert('UTC', 'UTC');
  96                         $login_refresh = true;
  97                 }
  98                 authenticate_success($r[0], false, false, $login_refresh);
  99         }
 100 } else {
 101         session_unset();
 102         if (
 103                 !(x($_POST, 'password') && strlen($_POST['password']))
 104                 && (
 105                         x($_POST, 'openid_url') && strlen($_POST['openid_url'])
 106                         || x($_POST, 'username') && strlen($_POST['username'])
 107                 )
 108         ) {
 109                 $noid = Config::get('system', 'no_openid');
 110
 111                 $openid_url = trim(strlen($_POST['openid_url']) ? $_POST['openid_url'] : $_POST['username']);
 112
 113                 // validate_url alters the calling parameter
 114
 115                 $temp_string = $openid_url;
 116
 117                 // if it's an email address or doesn't resolve to a URL, fail.
 118
 119                 if ($noid || strpos($temp_string, '@') || !validate_url($temp_string)) {
 120                         $a = get_app();
 121                         notice(t('Login failed.') . EOL);
 122                         goaway(System::baseUrl());
 123                         // NOTREACHED
 124                 }
 125
 126                 // Otherwise it's probably an openid.
 127
 128                 try {
 129                         require_once('library/openid.php');
 130                         $openid = new LightOpenID;
 131                         $openid->identity = $openid_url;
 132                         $_SESSION['openid'] = $openid_url;
 133                         $_SESSION['remember'] = $_POST['remember'];
 134                         $openid->returnUrl = System::baseUrl(true) . '/openid';
 135                         goaway($openid->authUrl());
 136                 } catch (Exception $e) {
 137                         notice(t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.') . '<br /><br >' . t('The error message was:') . ' ' . $e->getMessage());
 138                 }
 139                 // NOTREACHED
 140         }
 141
 142         if (x($_POST, 'auth-params') && $_POST['auth-params'] === 'login') {
 143                 $record = null;
 144
 145                 $addon_auth = array(
 146                         'username' => trim($_POST['username']),
 147                         'password' => trim($_POST['password']),
 148                         'authenticated' => 0,
 149                         'user_record' => null
 150                 );
 151
 152                 /**
 153                  *
 154                  * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
 155                  * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
 156                  * and later plugins should not interfere with an earlier one that succeeded.
 157                  *
 158                  */
 159                 call_hooks('authenticate', $addon_auth);
 160
 161                 if ($addon_auth['authenticated'] && count($addon_auth['user_record'])) {
 162                         $record = $addon_auth['user_record'];
 163                 } else {
 164                         $user_id = User::authenticate(trim($_POST['username']), trim($_POST['password']));
 165                         if ($user_id) {
 166                                 $record = dba::select('user', [], ['uid' => $user_id], ['limit' => 1]);
 167                         }
 168                 }
 169
 170                 if (!$record || !count($record)) {
 171                         logger('authenticate: failed login attempt: ' . notags(trim($_POST['username'])) . ' from IP ' . $_SERVER['REMOTE_ADDR']);
 172                         notice(t('Login failed.') . EOL);
 173                         goaway(System::baseUrl());
 174                 }
 175
 176                 if (!$_POST['remember']) {
 177                         new_cookie(0); // 0 means delete on browser exit
 178                 }
 179
 180                 // if we haven't failed up this point, log them in.
 181                 $_SESSION['remember'] = $_POST['remember'];
 182                 $_SESSION['last_login_date'] = datetime_convert('UTC', 'UTC');
 183                 authenticate_success($record, true, true);
 184         }
 185 }
 186
 187 /**
 188  * @brief Kills the "Friendica" cookie and all session data
 189  */
 190 function nuke_session()
 191 {
 192         new_cookie(-3600); // make sure cookie is deleted on browser close, as a security measure
 193         session_unset();
 194         session_destroy();
 195 }