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         require_once "version.php";
   9
  10         $session_expire = max(SESSION_COOKIE_LIFETIME, 86400);
  11         $session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
  12
  13         if (@$_SERVER['HTTPS'] == "on") {
  14                 $session_name .= "_ssl";
  15                 ini_set("session.cookie_secure", true);
  16         }
  17
  18         ini_set("session.gc_probability", 75);
  19         ini_set("session.name", $session_name);
  20         ini_set("session.use_only_cookies", true);
  21         ini_set("session.gc_maxlifetime", $session_expire);
  22         ini_set("session.cookie_lifetime", min(0, SESSION_COOKIE_LIFETIME));
  23
  24         global $session_connection;
  25
  26         function session_get_schema_version($link, $nocache = false) {
  27                 global $schema_version;
  28
  29                 if (!$schema_version) {
  30                         $result = db_query($link, "SELECT schema_version FROM ttrss_version");
  31                         $version = db_fetch_result($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                 if (!$link) return false;
  42
  43                 if (VERSION != $_SESSION["version"]) return false;
  44
  45                 $check_ip = $_SESSION['ip_address'];
  46
  47                 switch (SESSION_CHECK_ADDRESS) {
  48                 case 0:
  49                         $check_ip = '';
  50                         break;
  51                 case 1:
  52                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  53                         break;
  54                 case 2:
  55                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
  56                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  57                         break;
  58                 };
  59
  60                 if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
  61                         $_SESSION["login_error_msg"] =
  62                                 __("Session failed to validate (incorrect IP)");
  63                         return false;
  64                 }
  65
  66                 if ($_SESSION["ref_schema_version"] != session_get_schema_version($link, true))
  67                         return false;
  68
  69                 if (sha1($_SERVER['HTTP_USER_AGENT']) != $_SESSION["user_agent"])
  70                         return false;
  71
  72                 if ($_SESSION["uid"]) {
  73                         $result = db_query($link,
  74                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  75
  76                         // user not found
  77                         if (db_num_rows($result) == 0) {
  78                                 return false;
  79                         } else {
  80                                 $pwd_hash = db_fetch_result($result, 0, "pwd_hash");
  81
  82                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  83                                         return false;
  84                                 }
  85                         }
  86                 }
  87
  88 /*              if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
  89
  90                         //print_r($_SESSION);
  91
  92                         if (time() > $_SESSION["cookie_lifetime"]) {
  93                                 return false;
  94                         }
  95                 } */
  96
  97                 return true;
  98         }
  99
 100
 101         function ttrss_open ($s, $n) {
 102                 global $session_connection;
 103
 104                 $session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
 105
 106                 return true;
 107         }
 108
 109         function ttrss_read ($id){
 110
 111                 global $session_connection,$session_read;
 112
 113                 $query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
 114
 115                 $res = db_query($session_connection, $query);
 116
 117                 if (db_num_rows($res) != 1) {
 118                         return "";
 119                 } else {
 120                         $session_read = db_fetch_assoc($res);
 121                         $session_read["data"] = base64_decode($session_read["data"]);
 122                         return $session_read["data"];
 123                 }
 124         }
 125
 126         function ttrss_write ($id, $data) {
 127
 128                 if (! $data) {
 129                         return false;
 130                 }
 131
 132                 global $session_connection, $session_read, $session_expire;
 133
 134                 $expire = time() + $session_expire;
 135
 136                 $data = db_escape_string($session_connection, base64_encode($data), false);
 137
 138                 if ($session_read) {
 139                         $query = "UPDATE ttrss_sessions SET data='$data',
 140                                         expire='$expire' WHERE id='$id'";
 141                 } else {
 142                         $query = "INSERT INTO ttrss_sessions (id, data, expire)
 143                                         VALUES ('$id', '$data', '$expire')";
 144                 }
 145
 146                 db_query($session_connection, $query);
 147                 return true;
 148         }
 149
 150         function ttrss_close () {
 151
 152                 global $session_connection;
 153
 154                 //db_close($session_connection);
 155
 156                 return true;
 157         }
 158
 159         function ttrss_destroy ($id) {
 160
 161                 global $session_connection;
 162
 163                 $query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
 164
 165                 db_query($session_connection, $query);
 166
 167                 return true;
 168         }
 169
 170         function ttrss_gc ($expire) {
 171
 172                 global $session_connection;
 173
 174                 $query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
 175
 176                 db_query($session_connection, $query);
 177         }
 178
 179         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 180                 session_set_save_handler("ttrss_open",
 181                         "ttrss_close", "ttrss_read", "ttrss_write",
 182                         "ttrss_destroy", "ttrss_gc");
 183         }
 184
 185         if (!defined('NO_SESSION_AUTOSTART')) {
 186                 if (isset($_COOKIE[session_name()])) {
 187                         @session_start();
 188                 }
 189         }
 190 ?>