include/auth.php

   1 <?php
   2 require_once('include/security.php');
   3 require_once('include/datetime.php');
   4
   5 // When the "Friendica" cookie is set, take the value to authenticate and renew the cookie.
   6 if (isset($_COOKIE["Friendica"])) {
   7         $data = json_decode($_COOKIE["Friendica"]);
   8         if (isset($data->uid)) {
   9                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  10                 FROM `user` WHERE `uid` = %d AND NOT `blocked` AND NOT `account_expired` AND NOT `account_removed` AND `verified` LIMIT 1",
  11                         intval($data->uid)
  12                 );
  13
  14                 if ($r) {
  15                         if ($data->hash != cookie_hash($r[0])) {
  16                                 logger("Hash for user ".$data->uid." doesn't fit.");
  17                                 nuke_session();
  18                                 goaway(z_root());
  19                         }
  20
  21                         // Renew the cookie
  22                         new_cookie(604800, $r[0]);
  23
  24                         // Do the authentification if not done by now
  25                         if (!isset($_SESSION) OR !isset($_SESSION['authenticated'])) {
  26                                 authenticate_success($r[0]);
  27
  28                                 if (get_config('system','paranoia'))
  29                                         $_SESSION['addr'] = $data->ip;
  30                         }
  31                 }
  32         }
  33 }
  34
  35
  36 // login/logout
  37
  38 if (isset($_SESSION) && x($_SESSION,'authenticated') && (!x($_POST,'auth-params') || ($_POST['auth-params'] !== 'login'))) {
  39
  40         if ((x($_POST,'auth-params') && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
  41
  42                 // process logout request
  43                 call_hooks("logging_out");
  44                 nuke_session();
  45                 info(t('Logged out.').EOL);
  46                 goaway(z_root());
  47         }
  48
  49         if (x($_SESSION,'visitor_id') && !x($_SESSION,'uid')) {
  50                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
  51                         intval($_SESSION['visitor_id'])
  52                 );
  53                 if (dbm::is_result($r)) {
  54                         $a->contact = $r[0];
  55                 }
  56         }
  57
  58         if (x($_SESSION,'uid')) {
  59
  60                 // already logged in user returning
  61
  62                 $check = get_config('system','paranoia');
  63                 // extra paranoia - if the IP changed, log them out
  64                 if ($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
  65                         logger('Session address changed. Paranoid setting in effect, blocking session. '.
  66                                 $_SESSION['addr'].' != '.$_SERVER['REMOTE_ADDR']);
  67                         nuke_session();
  68                         goaway(z_root());
  69                 }
  70
  71                 $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
  72                 FROM `user` WHERE `uid` = %d AND NOT `blocked` AND NOT `account_expired` AND NOT `account_removed` AND `verified` LIMIT 1",
  73                         intval($_SESSION['uid'])
  74                 );
  75
  76                 if (!dbm::is_result($r)) {
  77                         nuke_session();
  78                         goaway(z_root());
  79                 }
  80
  81                 // Make sure to refresh the last login time for the user if the user
  82                 // stays logged in for a long time, e.g. with "Remember Me"
  83                 $login_refresh = false;
  84                 if (!x($_SESSION['last_login_date'])) {
  85                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  86                 }
  87                 if (strcmp(datetime_convert('UTC','UTC','now - 12 hours'), $_SESSION['last_login_date']) > 0) {
  88
  89                         $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
  90                         $login_refresh = true;
  91                 }
  92                 authenticate_success($r[0], false, false, $login_refresh);
  93         }
  94 } else {
  95
  96         session_unset();
  97
  98         if (x($_POST,'password') && strlen($_POST['password']))
  99                 $encrypted = hash('whirlpool',trim($_POST['password']));
 100         else {
 101                 if ((x($_POST,'openid_url')) && strlen($_POST['openid_url']) ||
 102                    (x($_POST,'username')) && strlen($_POST['username'])) {
 103
 104                         $noid = get_config('system','no_openid');
 105
 106                         $openid_url = trim((strlen($_POST['openid_url'])?$_POST['openid_url']:$_POST['username']));
 107
 108                         // validate_url alters the calling parameter
 109
 110                         $temp_string = $openid_url;
 111
 112                         // if it's an email address or doesn't resolve to a URL, fail.
 113
 114                         if ($noid || strpos($temp_string,'@') || !validate_url($temp_string)) {
 115                                 $a = get_app();
 116                                 notice(t('Login failed.').EOL);
 117                                 goaway(z_root());
 118                                 // NOTREACHED
 119                         }
 120
 121                         // Otherwise it's probably an openid.
 122
 123                         try {
 124                                 require_once('library/openid.php');
 125                                 $openid = new LightOpenID;
 126                                 $openid->identity = $openid_url;
 127                                 $_SESSION['openid'] = $openid_url;
 128                                 $openid->returnUrl = App::get_baseurl(true).'/openid';
 129                                 goaway($openid->authUrl());
 130                         } catch (Exception $e) {
 131                                 notice(t('We encountered a problem while logging in with the OpenID you provided. Please check the correct spelling of the ID.').'<br /><br >'.t('The error message was:').' '.$e->getMessage());
 132                         }
 133                         // NOTREACHED
 134                 }
 135         }
 136
 137         if (x($_POST,'auth-params') && $_POST['auth-params'] === 'login') {
 138
 139                 $record = null;
 140
 141                 $addon_auth = array(
 142                         'username' => trim($_POST['username']),
 143                         'password' => trim($_POST['password']),
 144                         'authenticated' => 0,
 145                         'user_record' => null
 146                 );
 147
 148                 /**
 149                  *
 150                  * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
 151                  * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
 152                  * and later plugins should not interfere with an earlier one that succeeded.
 153                  *
 154                  */
 155
 156                 call_hooks('authenticate', $addon_auth);
 157
 158                 if ($addon_auth['authenticated'] && count($addon_auth['user_record']))
 159                         $record = $addon_auth['user_record'];
 160                 else {
 161
 162                         // process normal login request
 163
 164                         $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
 165                                 FROM `user` WHERE (`email` = '%s' OR `nickname` = '%s')
 166                                 AND `password` = '%s' AND NOT `blocked` AND NOT `account_expired` AND NOT `account_removed` AND `verified` LIMIT 1",
 167                                 dbesc(trim($_POST['username'])),
 168                                 dbesc(trim($_POST['username'])),
 169                                 dbesc($encrypted)
 170                         );
 171                         if (dbm::is_result($r))
 172                                 $record = $r[0];
 173                 }
 174
 175                 if (!$record || !count($record)) {
 176                         logger('authenticate: failed login attempt: '.notags(trim($_POST['username'])).' from IP '.$_SERVER['REMOTE_ADDR']);
 177                         notice(t('Login failed.').EOL);
 178                         goaway(z_root());
 179                 }
 180
 181                 // If the user specified to remember the authentication, then set a cookie
 182                 // that expires after one week (the default is when the browser is closed).
 183                 // The cookie will be renewed automatically.
 184                 // The week ensures that sessions will expire after some inactivity.
 185                 if ($_POST['remember'])
 186                         new_cookie(604800, $r[0]);
 187                 else
 188                         new_cookie(0); // 0 means delete on browser exit
 189
 190                 // if we haven't failed up this point, log them in.
 191
 192                 $_SESSION['last_login_date'] = datetime_convert('UTC','UTC');
 193                 authenticate_success($record, true, true);
 194         }
 195 }
 196
 197 /**
 198  * @brief Kills the "Friendica" cookie and all session data
 199  */
 200 function nuke_session() {
 201
 202         new_cookie(-3600); // make sure cookie is deleted on browser close, as a security measure
 203         session_unset();
 204         session_destroy();
 205 }
 206
 207 /**
 208  * @brief Calculate the hash that is needed for the "Friendica" cookie
 209  *
 210  * @param array $user Record from "user" table
 211  *
 212  * @return string Hashed data
 213  */
 214 function cookie_hash($user) {
 215         return(hash("sha256", get_config("system", "site_prvkey").
 216                                 $user["uprvkey"].
 217                                 $user["password"]));
 218 }
 219
 220 /**
 221  * @brief Set the "Friendica" cookie
 222  *
 223  * @param int $time
 224  * @param array $user Record from "user" table
 225  */
 226 function new_cookie($time, $user = array()) {
 227
 228         if ($time != 0)
 229                 $time = $time + time();
 230
 231         if ($user)
 232                 $value = json_encode(array("uid" => $user["uid"],
 233                                         "hash" => cookie_hash($user),
 234                                         "ip" => $_SERVER['REMOTE_ADDR']));
 235         else
 236                 $value = "";
 237
 238         setcookie("Friendica", $value, $time, "/", "",
 239                 (get_config('system', 'ssl_policy') == SSL_POLICY_FULL), true);
 240
 241 }