include/auth.php

   1 <?php
   2
   3
   4 require_once('include/security.php');
   5 require_once('include/datetime.php');
   6
   7 function nuke_session() {
   8
   9         new_cookie(0); // make sure cookie is deleted on browser close, as a security measure
  10         session_unset();
  11 }
  12
  13
  14 // login/logout
  15
  16 if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-params'))) || ($_POST['auth-params'] !== 'login'))) {
  17
  18         if(((x($_POST,'auth-params')) && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
  19
  20                 // process logout request
  21                 call_hooks("logging_out");
  22                 nuke_session();
  23                 new_cookie(-1);
  24                 info( t('Logged out.') . EOL);
  25                 goaway(z_root());
  26         }
  27
  28         if(x($_SESSION,'visitor_id') && (! x($_SESSION,'uid'))) {
  29                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
  30                         intval($_SESSION['visitor_id'])
  31                 );
  32                 if(count($r)) {
  33                         $a->contact = $r[0];
  34                 }
  35         }
  36
  37         if(x($_SESSION,'uid')) {
  38
  39                 // already logged in user returning
  40
  41                 $check = get_config('system','paranoia');
  42                 // extra paranoia - if the IP changed, log them out
  43                 if($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
  44                         logger('Session address changed. Paranoid setting in effect, blocking session. '
  45                                 . $_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
  46                         nuke_session();
  47                         goaway(z_root());
  48                 }
  49
  50                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  51                 FROM `user` WHERE `uid` = %d AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
  52                         intval($_SESSION['uid'])
  53                 );
  54
  55                 if(! count($r)) {
  56                         nuke_session();
  57                         goaway(z_root());
  58                 }
  59
  60                 // Make sure to refresh the last login time for the user if the user
  61                 // stays logged in for a long time, e.g. with "Remember Me"
  62                 $login_refresh = false;
  63                 if(! x($_SESSION['last_login_date'])) {
  64                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  65                 }
  66                 if( strcmp(datetime_convert('UTC','UTC','now - 12 hours'), $_SESSION['last_login_date']) > 0 ) {
  67
  68                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  69                         $login_refresh = true;
  70                 }
  71                 authenticate_success($r[0], false, false, $login_refresh);
  72         }
  73 } else {
  74
  75         if(isset($_SESSION)) {
  76                 nuke_session();
  77         }
  78
  79         if((x($_POST,'password')) && strlen($_POST['password']))
  80                 $encrypted = hash('whirlpool',trim($_POST['password']));
  81         else {
  82                 if((x($_POST,'openid_url')) && strlen($_POST['openid_url']) ||
  83                    (x($_POST,'username')) && strlen($_POST['username'])) {
  84
  85                         $noid = get_config('system','no_openid');
  86
  87                         $openid_url = trim((strlen($_POST['openid_url'])?$_POST['openid_url']:$_POST['username']) );
  88
  89                         // validate_url alters the calling parameter
  90
  91                         $temp_string = $openid_url;
  92
  93                         // if it's an email address or doesn't resolve to a URL, fail.
  94
  95                         if(($noid) || (strpos($temp_string,'@')) || (! validate_url($temp_string))) {
  96                                 $a = get_app();
  97                                 notice( t('Login failed.') . EOL);
  98                                 goaway(z_root());
  99                                 // NOTREACHED
 100                         }
 101
 102                         // Otherwise it's probably an openid.
 103
 104                         try {
 105                         require_once('library/openid.php');
 106                         $openid = new LightOpenID;
 107                         $openid->identity = $openid_url;
 108                         $_SESSION['openid'] = $openid_url;
 109                         $a = get_app();
 110                         $openid->returnUrl = $a->get_baseurl(true) . '/openid';
 111                         goaway($openid->authUrl());
 112                         } catch (Exception $e) {
 113                             notice( t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.').'<br /><br >'. t('The error message was:').' '.$e->getMessage());
 114                         }
 115                         // NOTREACHED
 116                 }
 117         }
 118
 119         if((x($_POST,'auth-params')) && $_POST['auth-params'] === 'login') {
 120
 121                 $record = null;
 122
 123                 $addon_auth = array(
 124                         'username' => trim($_POST['username']),
 125                         'password' => trim($_POST['password']),
 126                         'authenticated' => 0,
 127                         'user_record' => null
 128                 );
 129
 130                 /**
 131                  *
 132                  * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
 133                  * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
 134                  * and later plugins should not interfere with an earlier one that succeeded.
 135                  *
 136                  */
 137
 138                 call_hooks('authenticate', $addon_auth);
 139
 140                 if(($addon_auth['authenticated']) && (count($addon_auth['user_record']))) {
 141                         $record = $addon_auth['user_record'];
 142                 }
 143                 else {
 144
 145                         // process normal login request
 146
 147                         $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
 148                                 FROM `user` WHERE ( `email` = '%s' OR `nickname` = '%s' )
 149                                 AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
 150                                 dbesc(trim($_POST['username'])),
 151                                 dbesc(trim($_POST['username'])),
 152                                 dbesc($encrypted)
 153                         );
 154                         if(count($r))
 155                                 $record = $r[0];
 156                 }
 157
 158                 if((! $record) || (! count($record))) {
 159                         logger('authenticate: failed login attempt: ' . notags(trim($_POST['username'])) . ' from IP ' . $_SERVER['REMOTE_ADDR']);
 160                         notice( t('Login failed.') . EOL );
 161                         goaway(z_root());
 162                 }
 163
 164                 // If the user specified to remember the authentication, then change the cookie
 165                 // to expire after one year (the default is when the browser is closed).
 166                 // If the user did not specify to remember, change the cookie to expire when the
 167                 // browser is closed. The reason this is necessary is because if the user
 168                 // specifies to remember, then logs out and logs back in without specifying to
 169                 // remember, the old "remember" cookie may remain and prevent the session from
 170                 // expiring when the browser is closed.
 171                 //
 172                 // It seems like I should be able to test for the old cookie, but for some reason when
 173                 // I read the lifetime value from session_get_cookie_params(), I always get '0'
 174                 // (i.e. expire when the browser is closed), even when there's a time expiration
 175                 // on the cookie
 176                 if($_POST['remember']) {
 177                         new_cookie(31449600); // one year
 178                 }
 179                 else {
 180                         new_cookie(0); // 0 means delete on browser exit
 181                 }
 182
 183                 // if we haven't failed up this point, log them in.
 184
 185                 $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
 186                 authenticate_success($record, true, true);
 187         }
 188 }
 189
 190 function new_cookie($time) {
 191
 192         if ($time != 0)
 193                 $time = $time + time();
 194
 195         $params = session_get_cookie_params();
 196         setcookie(session_name(), session_id(), $time, $params['path'], $params['domain'], $params['secure'], isset($params['httponly']));
 197         return;
 198 }