include/sessions.php

   1 <?php
   2         // Original from http://www.daniweb.com/code/snippet43.html
   3
   4         require_once "config.php";
   5         require_once "db.php";
   6         require_once "lib/accept-to-gettext.php";
   7         require_once "lib/gettext/gettext.inc";
   8
   9         $session_expire = max(SESSION_COOKIE_LIFETIME, 86400);
  10         $session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
  11
  12         if (@$_SERVER['HTTPS'] == "on") {
  13                 $session_name .= "_ssl";
  14                 ini_set("session.cookie_secure", true);
  15         }
  16
  17         ini_set("session.gc_probability", 50);
  18         ini_set("session.name", $session_name);
  19         ini_set("session.use_only_cookies", true);
  20         ini_set("session.gc_maxlifetime", $session_expire);
  21
  22         function session_get_schema_version($link, $nocache = false) {
  23                 global $schema_version;
  24
  25                 if (!$schema_version) {
  26                         $result = db_query($link, "SELECT schema_version FROM ttrss_version");
  27                         $version = db_fetch_result($result, 0, "schema_version");
  28                         $schema_version = $version;
  29                         return $version;
  30                 } else {
  31                         return $schema_version;
  32                 }
  33         }
  34
  35         function validate_session($link) {
  36                 if (SINGLE_USER_MODE) return true;
  37
  38                 $check_ip = $_SESSION['ip_address'];
  39
  40                 switch (SESSION_CHECK_ADDRESS) {
  41                 case 0:
  42                         $check_ip = '';
  43                         break;
  44                 case 1:
  45                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  46                         break;
  47                 case 2:
  48                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
  49                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  50                         break;
  51                 };
  52
  53                 if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
  54                         $_SESSION["login_error_msg"] =
  55                                 __("Session failed to validate (incorrect IP)");
  56                         return false;
  57                 }
  58
  59                 if ($_SESSION["ref_schema_version"] != session_get_schema_version($link, true))
  60                         return false;
  61
  62                 if ($_SESSION["uid"]) {
  63                         $result = db_query($link,
  64                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  65
  66                         // user not found
  67                         if (db_num_rows($result) == 0) {
  68                                 return false;
  69                         } else {
  70                                 $pwd_hash = db_fetch_result($result, 0, "pwd_hash");
  71
  72                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  73                                         return false;
  74                                 }
  75                         }
  76                 }
  77
  78 /*              if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
  79
  80                         //print_r($_SESSION);
  81
  82                         if (time() > $_SESSION["cookie_lifetime"]) {
  83                                 return false;
  84                         }
  85                 } */
  86
  87                 return true;
  88         }
  89
  90
  91         function ttrss_open ($s, $n) {
  92
  93                 global $session_connection;
  94
  95                 $session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  96
  97                 return true;
  98         }
  99
 100         function ttrss_read ($id){
 101
 102                 global $session_connection,$session_read;
 103
 104                 $query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
 105
 106                 $res = db_query($session_connection, $query);
 107
 108                 if (db_num_rows($res) != 1) {
 109                         return "";
 110                 } else {
 111                         $session_read = db_fetch_assoc($res);
 112                         $session_read["data"] = base64_decode($session_read["data"]);
 113                         return $session_read["data"];
 114                 }
 115         }
 116
 117         function ttrss_write ($id, $data) {
 118
 119                 if (! $data) {
 120                         return false;
 121                 }
 122
 123                 global $session_connection, $session_read, $session_expire;
 124
 125                 $expire = time() + $session_expire;
 126
 127                 $data = db_escape_string($session_connection, base64_encode($data), false);
 128
 129                 if ($session_read) {
 130                         $query = "UPDATE ttrss_sessions SET data='$data',
 131                                         expire='$expire' WHERE id='$id'";
 132                 } else {
 133                         $query = "INSERT INTO ttrss_sessions (id, data, expire)
 134                                         VALUES ('$id', '$data', '$expire')";
 135                 }
 136
 137                 db_query($session_connection, $query);
 138                 return true;
 139         }
 140
 141         function ttrss_close () {
 142
 143                 global $session_connection;
 144
 145                 //db_close($session_connection);
 146
 147                 return true;
 148         }
 149
 150         function ttrss_destroy ($id) {
 151
 152                 global $session_connection;
 153
 154                 $query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
 155
 156                 db_query($session_connection, $query);
 157
 158                 return true;
 159         }
 160
 161         function ttrss_gc ($expire) {
 162
 163                 global $session_connection;
 164
 165                 $query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
 166
 167                 db_query($session_connection, $query);
 168         }
 169
 170         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 171                 session_set_save_handler("ttrss_open",
 172                         "ttrss_close", "ttrss_read", "ttrss_write",
 173                         "ttrss_destroy", "ttrss_gc");
 174         }
 175
 176         if (!defined('TTRSS_SESSION_NAME') || TTRSS_SESSION_NAME != 'ttrss_api_sid') {
 177                 if (isset($_COOKIE[$session_name])) {
 178                         @session_start();
 179
 180                         if (!isset($_SESSION["uid"]) || !$_SESSION["uid"] || !validate_session($session_connection)) {
 181                                 session_destroy();
 182                            setcookie(session_name(), '', time()-42000, '/');
 183                         }
 184                 }
 185         }
 186 ?>