include/auth.php

   1 <?php
   2 require_once('include/security.php');
   3 require_once('include/datetime.php');
   4
   5 function nuke_session() {
   6
   7         new_cookie(0); // make sure cookie is deleted on browser close, as a security measure
   8         session_unset();
   9 }
  10
  11 // When the "Friendica" cookie is set, take the value to authenticate and renew the cookie.
  12 if(isset($_COOKIE["Friendica"])) {
  13         $data = json_decode($_COOKIE["Friendica"]);
  14         if (isset($data->uid)) {
  15                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  16                 FROM `user` WHERE `uid` = %d AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
  17                         intval($data->uid)
  18                 );
  19
  20                 if ($r) {
  21                         if ($data->hash != cookie_hash($r[0])) {
  22                                 logger("Hash for user ".$data->uid." doesn't fit.");
  23                                 nuke_session();
  24                                 goaway(z_root());
  25                         }
  26
  27                         // Renew the cookie
  28                         new_cookie(604800, $r[0]);
  29
  30                         // Do the authentification if not done by now
  31                         if(!isset($_SESSION) OR !isset($_SESSION['authenticated'])) {
  32                                 authenticate_success($r[0]);
  33
  34                                 if (get_config('system','paranoia'))
  35                                         $_SESSION['addr'] = $data->ip;
  36                         }
  37                 }
  38         }
  39 }
  40
  41
  42 // login/logout
  43
  44 if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-params'))) || ($_POST['auth-params'] !== 'login'))) {
  45
  46         if(((x($_POST,'auth-params')) && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
  47
  48                 // process logout request
  49                 call_hooks("logging_out");
  50                 nuke_session();
  51                 info(t('Logged out.').EOL);
  52                 goaway(z_root());
  53         }
  54
  55         if(x($_SESSION,'visitor_id') && (! x($_SESSION,'uid'))) {
  56                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
  57                         intval($_SESSION['visitor_id'])
  58                 );
  59                 if(count($r)) {
  60                         $a->contact = $r[0];
  61                 }
  62         }
  63
  64         if(x($_SESSION,'uid')) {
  65
  66                 // already logged in user returning
  67
  68                 $check = get_config('system','paranoia');
  69                 // extra paranoia - if the IP changed, log them out
  70                 if($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
  71                         logger('Session address changed. Paranoid setting in effect, blocking session. '
  72                                 . $_SESSION['addr'].' != '.$_SERVER['REMOTE_ADDR']);
  73                         nuke_session();
  74                         goaway(z_root());
  75                 }
  76
  77                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  78                 FROM `user` WHERE `uid` = %d AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
  79                         intval($_SESSION['uid'])
  80                 );
  81
  82                 if(! count($r)) {
  83                         nuke_session();
  84                         goaway(z_root());
  85                 }
  86
  87                 // Make sure to refresh the last login time for the user if the user
  88                 // stays logged in for a long time, e.g. with "Remember Me"
  89                 $login_refresh = false;
  90                 if(! x($_SESSION['last_login_date'])) {
  91                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  92                 }
  93                 if(strcmp(datetime_convert('UTC','UTC','now - 12 hours'), $_SESSION['last_login_date']) > 0) {
  94
  95                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  96                         $login_refresh = true;
  97                 }
  98                 authenticate_success($r[0], false, false, $login_refresh);
  99         }
 100 } else {
 101
 102         session_unset();
 103
 104         if((x($_POST,'password')) && strlen($_POST['password']))
 105                 $encrypted = hash('whirlpool',trim($_POST['password']));
 106         else {
 107                 if((x($_POST,'openid_url')) && strlen($_POST['openid_url']) ||
 108                    (x($_POST,'username')) && strlen($_POST['username'])) {
 109
 110                         $noid = get_config('system','no_openid');
 111
 112                         $openid_url = trim((strlen($_POST['openid_url'])?$_POST['openid_url']:$_POST['username']));
 113
 114                         // validate_url alters the calling parameter
 115
 116                         $temp_string = $openid_url;
 117
 118                         // if it's an email address or doesn't resolve to a URL, fail.
 119
 120                         if(($noid) || (strpos($temp_string,'@')) || (! validate_url($temp_string))) {
 121                                 $a = get_app();
 122                                 notice(t('Login failed.').EOL);
 123                                 goaway(z_root());
 124                                 // NOTREACHED
 125                         }
 126
 127                         // Otherwise it's probably an openid.
 128
 129                         try {
 130                                 require_once('library/openid.php');
 131                                 $openid = new LightOpenID;
 132                                 $openid->identity = $openid_url;
 133                                 $_SESSION['openid'] = $openid_url;
 134                                 $a = get_app();
 135                                 $openid->returnUrl = $a->get_baseurl(true).'/openid';
 136                                 goaway($openid->authUrl());
 137                         } catch (Exception $e) {
 138                                 notice(t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.').'<br /><br >'. t('The error message was:').' '.$e->getMessage());
 139                         }
 140                         // NOTREACHED
 141                 }
 142         }
 143
 144         if((x($_POST,'auth-params')) && $_POST['auth-params'] === 'login') {
 145
 146                 $record = null;
 147
 148                 $addon_auth = array(
 149                         'username' => trim($_POST['username']),
 150                         'password' => trim($_POST['password']),
 151                         'authenticated' => 0,
 152                         'user_record' => null
 153                 );
 154
 155                 /**
 156                  *
 157                  * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
 158                  * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
 159                  * and later plugins should not interfere with an earlier one that succeeded.
 160                  *
 161                  */
 162
 163                 call_hooks('authenticate', $addon_auth);
 164
 165                 if(($addon_auth['authenticated']) && (count($addon_auth['user_record']))) {
 166                         $record = $addon_auth['user_record'];
 167                 } else {
 168
 169                         // process normal login request
 170
 171                         $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
 172                                 FROM `user` WHERE (`email` = '%s' OR `nickname` = '%s')
 173                                 AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
 174                                 dbesc(trim($_POST['username'])),
 175                                 dbesc(trim($_POST['username'])),
 176                                 dbesc($encrypted)
 177                         );
 178                         if(count($r))
 179                                 $record = $r[0];
 180                 }
 181
 182                 if (!$record || !count($record)) {
 183                         logger('authenticate: failed login attempt: '.notags(trim($_POST['username'])).' from IP '.$_SERVER['REMOTE_ADDR']);
 184                         notice(t('Login failed.').EOL);
 185                         goaway(z_root());
 186                 }
 187
 188                 // If the user specified to remember the authentication, then set a cookie
 189                 // that expires after one week (the default is when the browser is closed).
 190                 // The cookie will be renewed automatically.
 191                 // The week ensures that sessions will expire after some inactivity.
 192                 if($_POST['remember'])
 193                         new_cookie(604800, $r[0]);
 194                 else
 195                         new_cookie(0); // 0 means delete on browser exit
 196
 197                 // if we haven't failed up this point, log them in.
 198
 199                 $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
 200                 authenticate_success($record, true, true);
 201         }
 202 }
 203
 204 function cookie_hash($user) {
 205         return(hash("sha256", get_config("system", "site_prvkey").
 206                                 $user["uprvkey"].
 207                                 $user["password"]));
 208 }
 209
 210 function new_cookie($time, $user = array()) {
 211
 212         if ($time != 0)
 213                 $time = $time + time();
 214
 215         if ($user)
 216                 $value = json_encode(array("uid" => $user["uid"],
 217                                         "hash" => cookie_hash($user),
 218                                         "ip" => $_SERVER['REMOTE_ADDR']));
 219         else
 220                 $value = "";
 221
 222         setcookie("Friendica", $value, $time, "/", "",
 223                 (get_config('system', 'ssl_policy') == SSL_POLICY_FULL), true);
 224
 225         return;
 226 }