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 = min(2147483647 - time() - 1, max(SESSION_COOKIE_LIFETIME, 86400));
  13         $session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
  14
  15         if ((!empty($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] != 'off')) || @$_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {
  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() {
  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 $schema_version;
  36                 }
  37         }
  38
  39         function validate_session() {
  40                 if (SINGLE_USER_MODE) return true;
  41
  42                 if (isset($_SESSION["ref_schema_version"]) && $_SESSION["ref_schema_version"] != session_get_schema_version()) {
  43                         $_SESSION["login_error_msg"] =
  44                                 __("Session failed to validate (schema version changed)");
  45                         return false;
  46                 }
  47
  48                 if ($_SESSION["uid"]) {
  49                         $result = Db::get()->query(
  50                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  51
  52                         // user not found
  53                         if (Db::get()->num_rows($result) == 0) {
  54
  55                                 $_SESSION["login_error_msg"] =
  56                                         __("Session failed to validate (user not found)");
  57
  58                                 return false;
  59                         } else {
  60                                 $pwd_hash = Db::get()->fetch_result($result, 0, "pwd_hash");
  61
  62                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  63
  64                                         $_SESSION["login_error_msg"] =
  65                                                 __("Session failed to validate (password changed)");
  66
  67                                         return false;
  68                                 }
  69                         }
  70                 }
  71
  72                 return true;
  73         }
  74
  75         /**
  76          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
  77          */
  78         function ttrss_open ($s, $n) {
  79                 return true;
  80         }
  81
  82         function ttrss_read ($id){
  83                 global $session_expire;
  84
  85                 $res = Db::get()->query("SELECT data FROM ttrss_sessions WHERE id='$id'");
  86
  87                 if (Db::get()->num_rows($res) != 1) {
  88
  89                         $expire = time() + $session_expire;
  90
  91                         Db::get()->query("INSERT INTO ttrss_sessions (id, data, expire)
  92                                         VALUES ('$id', '', '$expire')");
  93
  94                         return "";
  95                 } else {
  96                         return base64_decode(Db::get()->fetch_result($res, 0, "data"));
  97                 }
  98
  99         }
 100
 101         function ttrss_write ($id, $data) {
 102                 global $session_expire;
 103
 104                 $data = base64_encode($data);
 105                 $expire = time() + $session_expire;
 106
 107                 Db::get()->query("UPDATE ttrss_sessions SET data='$data', expire='$expire' WHERE id='$id'");
 108
 109                 return true;
 110         }
 111
 112         function ttrss_close () {
 113                 return true;
 114         }
 115
 116         function ttrss_destroy($id) {
 117                 Db::get()->query("DELETE FROM ttrss_sessions WHERE id = '$id'");
 118
 119                 return true;
 120         }
 121
 122         /**
 123          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
 124          */
 125         function ttrss_gc ($expire) {
 126                 Db::get()->query("DELETE FROM ttrss_sessions WHERE expire < " . time());
 127
 128                 return true;
 129         }
 130
 131         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 132                 session_set_save_handler("ttrss_open",
 133                         "ttrss_close", "ttrss_read", "ttrss_write",
 134                         "ttrss_destroy", "ttrss_gc");
 135                 register_shutdown_function('session_write_close');
 136         }
 137
 138         if (!defined('NO_SESSION_AUTOSTART')) {
 139                 if (isset($_COOKIE[session_name()])) {
 140                         @session_start();
 141                 }
 142         }