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($link, true))
  60                         return false;
  61
  62                 if (sha1($_SERVER['HTTP_USER_AGENT']) != $_SESSION["user_agent"])
  63                         return false;
  64
  65                 if ($_SESSION["uid"]) {
  66                         $result = db_query($link,
  67                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  68
  69                         // user not found
  70                         if (db_num_rows($result) == 0) {
  71                                 return false;
  72                         } else {
  73                                 $pwd_hash = db_fetch_result($result, 0, "pwd_hash");
  74
  75                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  76                                         return false;
  77                                 }
  78                         }
  79                 }
  80
  81 /*              if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
  82
  83                         //print_r($_SESSION);
  84
  85                         if (time() > $_SESSION["cookie_lifetime"]) {
  86                                 return false;
  87                         }
  88                 } */
  89
  90                 return true;
  91         }
  92
  93
  94         function ttrss_open ($s, $n) {
  95
  96                 global $session_connection;
  97
  98                 $session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  99
 100                 return true;
 101         }
 102
 103         function ttrss_read ($id){
 104
 105                 global $session_connection,$session_read;
 106
 107                 $query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
 108
 109                 $res = db_query($session_connection, $query);
 110
 111                 if (db_num_rows($res) != 1) {
 112                         return "";
 113                 } else {
 114                         $session_read = db_fetch_assoc($res);
 115                         $session_read["data"] = base64_decode($session_read["data"]);
 116                         return $session_read["data"];
 117                 }
 118         }
 119
 120         function ttrss_write ($id, $data) {
 121
 122                 if (! $data) {
 123                         return false;
 124                 }
 125
 126                 global $session_connection, $session_read, $session_expire;
 127
 128                 $expire = time() + $session_expire;
 129
 130                 $data = db_escape_string($session_connection, base64_encode($data), false);
 131
 132                 if ($session_read) {
 133                         $query = "UPDATE ttrss_sessions SET data='$data',
 134                                         expire='$expire' WHERE id='$id'";
 135                 } else {
 136                         $query = "INSERT INTO ttrss_sessions (id, data, expire)
 137                                         VALUES ('$id', '$data', '$expire')";
 138                 }
 139
 140                 db_query($session_connection, $query);
 141                 return true;
 142         }
 143
 144         function ttrss_close () {
 145
 146                 global $session_connection;
 147
 148                 //db_close($session_connection);
 149
 150                 return true;
 151         }
 152
 153         function ttrss_destroy ($id) {
 154
 155                 global $session_connection;
 156
 157                 $query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
 158
 159                 db_query($session_connection, $query);
 160
 161                 return true;
 162         }
 163
 164         function ttrss_gc ($expire) {
 165
 166                 global $session_connection;
 167
 168                 $query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
 169
 170                 db_query($session_connection, $query);
 171         }
 172
 173         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 174                 session_set_save_handler("ttrss_open",
 175                         "ttrss_close", "ttrss_read", "ttrss_write",
 176                         "ttrss_destroy", "ttrss_gc");
 177         }
 178
 179         if (!defined('TTRSS_SESSION_NAME') || TTRSS_SESSION_NAME != 'ttrss_api_sid') {
 180                 if (isset($_COOKIE[$session_name])) {
 181                         @session_start();
 182
 183                         if (!isset($_SESSION["uid"]) || !$_SESSION["uid"] || !validate_session($session_connection)) {
 184                                 session_destroy();
 185                            setcookie(session_name(), '', time()-42000, '/');
 186                         }
 187                 }
 188         }
 189 ?>