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         if (get_config('system', 'disable_database_session')) {
   9                 session_unset();
  10                 return;
  11         }
  12
  13         new_cookie(0); // make sure cookie is deleted on browser close, as a security measure
  14
  15         unset($_SESSION['authenticated']);
  16         unset($_SESSION['uid']);
  17         unset($_SESSION['visitor_id']);
  18         unset($_SESSION['administrator']);
  19         unset($_SESSION['cid']);
  20         unset($_SESSION['theme']);
  21         unset($_SESSION['mobile-theme']);
  22         unset($_SESSION['page_flags']);
  23         unset($_SESSION['submanage']);
  24         unset($_SESSION['my_url']);
  25         unset($_SESSION['my_address']);
  26         unset($_SESSION['addr']);
  27         unset($_SESSION['return_url']);
  28
  29 }
  30
  31
  32 // login/logout
  33
  34
  35
  36
  37 if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-params'))) || ($_POST['auth-params'] !== 'login'))) {
  38
  39         if(((x($_POST,'auth-params')) && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
  40
  41                 // process logout request
  42                 call_hooks("logging_out");
  43                 nuke_session();
  44                 info( t('Logged out.') . EOL);
  45                 goaway(z_root());
  46         }
  47
  48         if(x($_SESSION,'visitor_id') && (! x($_SESSION,'uid'))) {
  49                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
  50                         intval($_SESSION['visitor_id'])
  51                 );
  52                 if(count($r)) {
  53                         $a->contact = $r[0];
  54                 }
  55         }
  56
  57         if(x($_SESSION,'uid')) {
  58
  59                 // already logged in user returning
  60
  61                 $check = get_config('system','paranoia');
  62                 // extra paranoia - if the IP changed, log them out
  63                 if($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
  64                         logger('Session address changed. Paranoid setting in effect, blocking session. '
  65                                 . $_SESSION['addr'] . ' != ' . $_SERVER['REMOTE_ADDR']);
  66                         nuke_session();
  67                         goaway(z_root());
  68                 }
  69
  70                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  71                 FROM `user` WHERE `uid` = %d AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
  72                         intval($_SESSION['uid'])
  73                 );
  74
  75                 if(! count($r)) {
  76                         nuke_session();
  77                         goaway(z_root());
  78                 }
  79
  80                 // Make sure to refresh the last login time for the user if the user
  81                 // stays logged in for a long time, e.g. with "Remember Me"
  82                 $login_refresh = false;
  83                 if(! x($_SESSION['last_login_date'])) {
  84                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  85                 }
  86                 if( strcmp(datetime_convert('UTC','UTC','now - 12 hours'), $_SESSION['last_login_date']) > 0 ) {
  87
  88                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  89                         $login_refresh = true;
  90                 }
  91                 authenticate_success($r[0], false, false, $login_refresh);
  92         }
  93 }
  94 else {
  95
  96         if(isset($_SESSION)) {
  97                 nuke_session();
  98         }
  99
 100         if((x($_POST,'password')) && strlen($_POST['password']))
 101                 $encrypted = hash('whirlpool',trim($_POST['password']));
 102         else {
 103                 if((x($_POST,'openid_url')) && strlen($_POST['openid_url']) ||
 104                    (x($_POST,'username')) && strlen($_POST['username'])) {
 105
 106                         $noid = get_config('system','no_openid');
 107
 108                         $openid_url = trim((strlen($_POST['openid_url'])?$_POST['openid_url']:$_POST['username']) );
 109
 110                         // validate_url alters the calling parameter
 111
 112                         $temp_string = $openid_url;
 113
 114                         // if it's an email address or doesn't resolve to a URL, fail.
 115
 116                         if(($noid) || (strpos($temp_string,'@')) || (! validate_url($temp_string))) {
 117                                 $a = get_app();
 118                                 notice( t('Login failed.') . EOL);
 119                                 goaway(z_root());
 120                                 // NOTREACHED
 121                         }
 122
 123                         // Otherwise it's probably an openid.
 124
 125                         try {
 126                         require_once('library/openid.php');
 127                         $openid = new LightOpenID;
 128                         $openid->identity = $openid_url;
 129                         $_SESSION['openid'] = $openid_url;
 130                         $a = get_app();
 131                         $openid->returnUrl = $a->get_baseurl(true) . '/openid';
 132                         goaway($openid->authUrl());
 133                         } catch (Exception $e) {
 134                             notice( t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.').'<br /><br >'. t('The error message was:').' '.$e->getMessage());
 135                         }
 136                         // NOTREACHED
 137                 }
 138         }
 139
 140         if((x($_POST,'auth-params')) && $_POST['auth-params'] === 'login') {
 141
 142                 $record = null;
 143
 144                 $addon_auth = array(
 145                         'username' => trim($_POST['username']),
 146                         'password' => trim($_POST['password']),
 147                         'authenticated' => 0,
 148                         'user_record' => null
 149                 );
 150
 151                 /**
 152                  *
 153                  * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
 154                  * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
 155                  * and later plugins should not interfere with an earlier one that succeeded.
 156                  *
 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                 }
 164                 else {
 165
 166                         // process normal login request
 167
 168                         $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
 169                                 FROM `user` WHERE ( `email` = '%s' OR `nickname` = '%s' )
 170                                 AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
 171                                 dbesc(trim($_POST['username'])),
 172                                 dbesc(trim($_POST['username'])),
 173                                 dbesc($encrypted)
 174                         );
 175                         if(count($r))
 176                                 $record = $r[0];
 177                 }
 178
 179                 if((! $record) || (! count($record))) {
 180                         logger('authenticate: failed login attempt: ' . notags(trim($_POST['username'])) . ' from IP ' . $_SERVER['REMOTE_ADDR']);
 181                         notice( t('Login failed.') . EOL );
 182                         goaway(z_root());
 183                 }
 184
 185                 // If the user specified to remember the authentication, then change the cookie
 186                 // to expire after one year (the default is when the browser is closed).
 187                 // If the user did not specify to remember, change the cookie to expire when the
 188                 // browser is closed. The reason this is necessary is because if the user
 189                 // specifies to remember, then logs out and logs back in without specifying to
 190                 // remember, the old "remember" cookie may remain and prevent the session from
 191                 // expiring when the browser is closed.
 192                 //
 193                 // It seems like I should be able to test for the old cookie, but for some reason when
 194                 // I read the lifetime value from session_get_cookie_params(), I always get '0'
 195                 // (i.e. expire when the browser is closed), even when there's a time expiration
 196                 // on the cookie
 197                 if($_POST['remember']) {
 198                         new_cookie(31449600); // one year
 199                 }
 200                 else {
 201                         new_cookie(0); // 0 means delete on browser exit
 202                 }
 203
 204                 // if we haven't failed up this point, log them in.
 205
 206                 $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
 207                 authenticate_success($record, true, true);
 208         }
 209 }
 210
 211 function new_cookie($time) {
 212         if (!get_config('system', 'disable_database_session'))
 213                 $old_sid = session_id();
 214
 215         session_set_cookie_params($time);
 216
 217         if (!get_config('system', 'disable_database_session')) {
 218                 session_regenerate_id(false);
 219                 q("UPDATE session SET sid = '%s' WHERE sid = '%s'", dbesc(session_id()), dbesc($old_sid));
 220         }
 221 }