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         new_cookie(0); // make sure cookie is deleted on browser close, as a security measure
   9
  10         unset($_SESSION['authenticated']);
  11         unset($_SESSION['uid']);
  12         unset($_SESSION['visitor_id']);
  13         unset($_SESSION['administrator']);
  14         unset($_SESSION['cid']);
  15         unset($_SESSION['theme']);
  16         unset($_SESSION['mobile-theme']);
  17         unset($_SESSION['page_flags']);
  18         unset($_SESSION['submanage']);
  19         unset($_SESSION['my_url']);
  20         unset($_SESSION['my_address']);
  21         unset($_SESSION['addr']);
  22         unset($_SESSION['return_url']);
  23 }
  24
  25
  26 // login/logout
  27
  28
  29
  30
  31 if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-params'))) || ($_POST['auth-params'] !== 'login'))) {
  32
  33         if(((x($_POST,'auth-params')) && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
  34
  35                 // process logout request
  36                 call_hooks("logging_out");
  37                 nuke_session();
  38                 info( t('Logged out.') . EOL);
  39                 goaway(z_root());
  40         }
  41
  42         if(x($_SESSION,'visitor_id') && (! x($_SESSION,'uid'))) {
  43                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
  44                         intval($_SESSION['visitor_id'])
  45                 );
  46                 if(count($r)) {
  47                         $a->contact = $r[0];
  48                 }
  49         }
  50
  51         if(x($_SESSION,'uid')) {
  52
  53                 // already logged in user returning
  54
  55                 $check = get_config('system','paranoia');
  56                 // extra paranoia - if the IP changed, log them out
  57                 if($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
  58                         logger('Session address changed. Paranoid setting in effect, blocking session. '
  59                                 . $_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
  60                         nuke_session();
  61                         goaway(z_root());
  62                 }
  63
  64                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  65                 FROM `user` WHERE `uid` = %d AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
  66                         intval($_SESSION['uid'])
  67                 );
  68
  69                 if(! count($r)) {
  70                         nuke_session();
  71                         goaway(z_root());
  72                 }
  73
  74                 // Make sure to refresh the last login time for the user if the user
  75                 // stays logged in for a long time, e.g. with "Remember Me"
  76                 $login_refresh = false;
  77                 if(! x($_SESSION['last_login_date'])) {
  78                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  79                 }
  80                 if( strcmp(datetime_convert('UTC','UTC','now - 12 hours'), $_SESSION['last_login_date']) > 0 ) {
  81
  82                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  83                         $login_refresh = true;
  84                 }
  85                 authenticate_success($r[0], false, false, $login_refresh);
  86         }
  87 }
  88 else {
  89
  90         if(isset($_SESSION)) {
  91                 nuke_session();
  92         }
  93
  94         if((x($_POST,'password')) && strlen($_POST['password']))
  95                 $encrypted = hash('whirlpool',trim($_POST['password']));
  96         else {
  97                 if((x($_POST,'openid_url')) && strlen($_POST['openid_url']) ||
  98                    (x($_POST,'username')) && strlen($_POST['username'])) {
  99
 100                         $noid = get_config('system','no_openid');
 101
 102                         $openid_url = trim((strlen($_POST['openid_url'])?$_POST['openid_url']:$_POST['username']) );
 103
 104                         // validate_url alters the calling parameter
 105
 106                         $temp_string = $openid_url;
 107
 108                         // if it's an email address or doesn't resolve to a URL, fail.
 109
 110                         if(($noid) || (strpos($temp_string,'@')) || (! validate_url($temp_string))) {
 111                                 $a = get_app();
 112                                 notice( t('Login failed.') . EOL);
 113                                 goaway(z_root());
 114                                 // NOTREACHED
 115                         }
 116
 117                         // Otherwise it's probably an openid.
 118
 119                         try {
 120                         require_once('library/openid.php');
 121                         $openid = new LightOpenID;
 122                         $openid->identity = $openid_url;
 123                         $_SESSION['openid'] = $openid_url;
 124                         $a = get_app();
 125                         $openid->returnUrl = $a->get_baseurl(true) . '/openid';
 126                         goaway($openid->authUrl());
 127                         } catch (Exception $e) {
 128                             notice( t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.').'<br /><br >'. t('The error message was:').' '.$e->getMessage());
 129                         }
 130                         // NOTREACHED
 131                 }
 132         }
 133
 134         if((x($_POST,'auth-params')) && $_POST['auth-params'] === 'login') {
 135
 136                 $record = null;
 137
 138                 $addon_auth = array(
 139                         'username' => trim($_POST['username']),
 140                         'password' => trim($_POST['password']),
 141                         'authenticated' => 0,
 142                         'user_record' => null
 143                 );
 144
 145                 /**
 146                  *
 147                  * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
 148                  * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
 149                  * and later plugins should not interfere with an earlier one that succeeded.
 150                  *
 151                  */
 152
 153                 call_hooks('authenticate', $addon_auth);
 154
 155                 if(($addon_auth['authenticated']) && (count($addon_auth['user_record']))) {
 156                         $record = $addon_auth['user_record'];
 157                 }
 158                 else {
 159
 160                         // process normal login request
 161
 162                         $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
 163                                 FROM `user` WHERE ( `email` = '%s' OR `nickname` = '%s' )
 164                                 AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
 165                                 dbesc(trim($_POST['username'])),
 166                                 dbesc(trim($_POST['username'])),
 167                                 dbesc($encrypted)
 168                         );
 169                         if(count($r))
 170                                 $record = $r[0];
 171                 }
 172
 173                 if((! $record) || (! count($record))) {
 174                         logger('authenticate: failed login attempt: ' . notags(trim($_POST['username'])) . ' from IP ' . $_SERVER['REMOTE_ADDR']);
 175                         notice( t('Login failed.') . EOL );
 176                         goaway(z_root());
 177                 }
 178
 179                 // If the user specified to remember the authentication, then change the cookie
 180                 // to expire after one year (the default is when the browser is closed).
 181                 // If the user did not specify to remember, change the cookie to expire when the
 182                 // browser is closed. The reason this is necessary is because if the user
 183                 // specifies to remember, then logs out and logs back in without specifying to
 184                 // remember, the old "remember" cookie may remain and prevent the session from
 185                 // expiring when the browser is closed.
 186                 //
 187                 // It seems like I should be able to test for the old cookie, but for some reason when
 188                 // I read the lifetime value from session_get_cookie_params(), I always get '0'
 189                 // (i.e. expire when the browser is closed), even when there's a time expiration
 190                 // on the cookie
 191                 if($_POST['remember']) {
 192                         new_cookie(31449600); // one year
 193                 }
 194                 else {
 195                         new_cookie(0); // 0 means delete on browser exit
 196                 }
 197
 198                 // if we haven't failed up this point, log them in.
 199
 200                 $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
 201                 authenticate_success($record, true, true);
 202         }
 203 }
 204
 205 function new_cookie($time) {
 206         $old_sid = session_id();
 207         session_set_cookie_params("$time");
 208         session_regenerate_id(false);
 209
 210         q("UPDATE session SET sid = '%s' WHERE sid = '%s'", dbesc(session_id()), dbesc($old_sid));
 211 }