include/sessions.php

   1 <?php
   2         // Original from http://www.daniweb.com/code/snippet43.html
   3
   4         require_once "config.php";
   5         require_once "classes/db.php";
   6         require_once "autoload.php";
   7         require_once "errorhandler.php";
   8         require_once "lib/accept-to-gettext.php";
   9         require_once "lib/gettext/gettext.inc";
  10         require_once "version.php";
  11
  12         $session_expire = max(SESSION_COOKIE_LIFETIME, 86400);
  13         $session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
  14
  15         if (@$_SERVER['HTTPS'] == "on") {
  16                 $session_name .= "_ssl";
  17                 ini_set("session.cookie_secure", true);
  18         }
  19
  20         ini_set("session.gc_probability", 75);
  21         ini_set("session.name", $session_name);
  22         ini_set("session.use_only_cookies", true);
  23         ini_set("session.gc_maxlifetime", $session_expire);
  24         ini_set("session.cookie_lifetime", min(0, SESSION_COOKIE_LIFETIME));
  25
  26         function session_get_schema_version($nocache = false) {
  27                 global $schema_version;
  28
  29                 if (!$schema_version) {
  30                         $result = Db::get()->query("SELECT schema_version FROM ttrss_version");
  31                         $version = Db::get()->fetch_result($result, 0, "schema_version");
  32                         $schema_version = $version;
  33                         return $version;
  34                 } else {
  35                         return $schema_version;
  36                 }
  37         }
  38
  39         function validate_session($link) {
  40                 if (SINGLE_USER_MODE) return true;
  41
  42                 if (VERSION != $_SESSION["version"]) return false;
  43
  44                 $check_ip = $_SESSION['ip_address'];
  45
  46                 switch (SESSION_CHECK_ADDRESS) {
  47                 case 0:
  48                         $check_ip = '';
  49                         break;
  50                 case 1:
  51                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  52                         break;
  53                 case 2:
  54                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
  55                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  56                         break;
  57                 };
  58
  59                 if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
  60                         $_SESSION["login_error_msg"] =
  61                                 __("Session failed to validate (incorrect IP)");
  62                         return false;
  63                 }
  64
  65                 if ($_SESSION["ref_schema_version"] != session_get_schema_version(true))
  66                         return false;
  67
  68                 if (sha1($_SERVER['HTTP_USER_AGENT']) != $_SESSION["user_agent"])
  69                         return false;
  70
  71                 if ($_SESSION["uid"]) {
  72                         $result = Db::get()->query(
  73                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  74
  75                         // user not found
  76                         if (Db::get()->num_rows($result) == 0) {
  77                                 return false;
  78                         } else {
  79                                 $pwd_hash = Db::get()->fetch_result($result, 0, "pwd_hash");
  80
  81                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  82                                         return false;
  83                                 }
  84                         }
  85                 }
  86
  87                 return true;
  88         }
  89
  90
  91         function ttrss_open ($s, $n) {
  92                 return true;
  93         }
  94
  95         function ttrss_read ($id){
  96                 global $session_expire;
  97
  98                 $res = Db::get()->query("SELECT data FROM ttrss_sessions WHERE id='$id'");
  99
 100                 if (Db::get()->num_rows($res) != 1) {
 101
 102                         $expire = time() + $session_expire;
 103
 104                         Db::get()->query("INSERT INTO ttrss_sessions (id, data, expire)
 105                                         VALUES ('$id', '', '$expire')");
 106
 107                         return "";
 108                 } else {
 109                         return base64_decode(Db::get()->fetch_result($res, 0, "data"));
 110                 }
 111
 112         }
 113
 114         function ttrss_write ($id, $data) {
 115                 global $session_expire;
 116
 117                 $data = base64_encode($data);
 118                 $expire = time() + $session_expire;
 119
 120                 Db::get()->query("UPDATE ttrss_sessions SET data='$data', expire='$expire' WHERE id='$id'");
 121
 122                 return true;
 123         }
 124
 125         function ttrss_close () {
 126                 return true;
 127         }
 128
 129         function ttrss_destroy($id) {
 130                 Db::get()->query("DELETE FROM ttrss_sessions WHERE id = '$id'");
 131
 132                 return true;
 133         }
 134
 135         function ttrss_gc ($expire) {
 136                 Db::get()->query("DELETE FROM ttrss_sessions WHERE expire < " . time());
 137         }
 138
 139         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 140                 session_set_save_handler("ttrss_open",
 141                         "ttrss_close", "ttrss_read", "ttrss_write",
 142                         "ttrss_destroy", "ttrss_gc");
 143                 register_shutdown_function('session_write_close');
 144         }
 145
 146         if (!defined('NO_SESSION_AUTOSTART')) {
 147                 if (isset($_COOKIE[session_name()])) {
 148                         @session_start();
 149                 }
 150         }
 151 ?>