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         global $session_connection;
  23
  24         $session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  25
  26         function session_get_schema_version($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                 $check_ip = $_SESSION['ip_address'];
  44
  45                 switch (SESSION_CHECK_ADDRESS) {
  46                 case 0:
  47                         $check_ip = '';
  48                         break;
  49                 case 1:
  50                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  51                         break;
  52                 case 2:
  53                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
  54                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  55                         break;
  56                 };
  57
  58                 if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
  59                         $_SESSION["login_error_msg"] =
  60                                 __("Session failed to validate (incorrect IP)");
  61                         return false;
  62                 }
  63
  64                 if ($_SESSION["ref_schema_version"] != session_get_schema_version($link, true))
  65                         return false;
  66
  67                 if (sha1($_SERVER['HTTP_USER_AGENT']) != $_SESSION["user_agent"])
  68                         return false;
  69
  70                 if ($_SESSION["uid"]) {
  71                         $result = db_query($link,
  72                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  73
  74                         // user not found
  75                         if (db_num_rows($result) == 0) {
  76                                 return false;
  77                         } else {
  78                                 $pwd_hash = db_fetch_result($result, 0, "pwd_hash");
  79
  80                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  81                                         return false;
  82                                 }
  83                         }
  84                 }
  85
  86 /*              if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
  87
  88                         //print_r($_SESSION);
  89
  90                         if (time() > $_SESSION["cookie_lifetime"]) {
  91                                 return false;
  92                         }
  93                 } */
  94
  95                 return true;
  96         }
  97
  98
  99         function ttrss_open ($s, $n) {
 100
 101                 global $session_connection;
 102
 103                 return true;
 104         }
 105
 106         function ttrss_read ($id){
 107
 108                 global $session_connection,$session_read;
 109
 110                 $query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
 111
 112                 $res = db_query($session_connection, $query);
 113
 114                 if (db_num_rows($res) != 1) {
 115                         return "";
 116                 } else {
 117                         $session_read = db_fetch_assoc($res);
 118                         $session_read["data"] = base64_decode($session_read["data"]);
 119                         return $session_read["data"];
 120                 }
 121         }
 122
 123         function ttrss_write ($id, $data) {
 124
 125                 if (! $data) {
 126                         return false;
 127                 }
 128
 129                 global $session_connection, $session_read, $session_expire;
 130
 131                 $expire = time() + $session_expire;
 132
 133                 $data = db_escape_string($session_connection, base64_encode($data), false);
 134
 135                 if ($session_read) {
 136                         $query = "UPDATE ttrss_sessions SET data='$data',
 137                                         expire='$expire' WHERE id='$id'";
 138                 } else {
 139                         $query = "INSERT INTO ttrss_sessions (id, data, expire)
 140                                         VALUES ('$id', '$data', '$expire')";
 141                 }
 142
 143                 db_query($session_connection, $query);
 144                 return true;
 145         }
 146
 147         function ttrss_close () {
 148
 149                 global $session_connection;
 150
 151                 //db_close($session_connection);
 152
 153                 return true;
 154         }
 155
 156         function ttrss_destroy ($id) {
 157
 158                 global $session_connection;
 159
 160                 $query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
 161
 162                 db_query($session_connection, $query);
 163
 164                 return true;
 165         }
 166
 167         function ttrss_gc ($expire) {
 168
 169                 global $session_connection;
 170
 171                 $query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
 172
 173                 db_query($session_connection, $query);
 174         }
 175
 176         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 177                 session_set_save_handler("ttrss_open",
 178                         "ttrss_close", "ttrss_read", "ttrss_write",
 179                         "ttrss_destroy", "ttrss_gc");
 180         }
 181
 182         if (!defined('TTRSS_SESSION_NAME') || TTRSS_SESSION_NAME != 'ttrss_api_sid') {
 183                 if (isset($_COOKIE[$session_name])) {
 184                         @session_start();
 185
 186                         if (!isset($_SESSION["uid"]) || !$_SESSION["uid"] || !validate_session($session_connection)) {
 187                                 session_destroy();
 188                            setcookie(session_name(), '', time()-42000, '/');
 189                         }
 190                 }
 191         }
 192 ?>