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 $session_connection;
  23
  24         function session_get_schema_version($link, $nocache = false) {
  25                 global $schema_version;
  26
  27                 if (!$schema_version) {
  28                         $result = db_query($link, "SELECT schema_version FROM ttrss_version");
  29                         $version = db_fetch_result($result, 0, "schema_version");
  30                         $schema_version = $version;
  31                         return $version;
  32                 } else {
  33                         return $schema_version;
  34                 }
  35         }
  36
  37         function validate_session($link) {
  38                 if (SINGLE_USER_MODE) return true;
  39                 if (!$link) return false;
  40
  41                 $check_ip = $_SESSION['ip_address'];
  42
  43                 switch (SESSION_CHECK_ADDRESS) {
  44                 case 0:
  45                         $check_ip = '';
  46                         break;
  47                 case 1:
  48                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  49                         break;
  50                 case 2:
  51                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
  52                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  53                         break;
  54                 };
  55
  56                 if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
  57                         $_SESSION["login_error_msg"] =
  58                                 __("Session failed to validate (incorrect IP)");
  59                         return false;
  60                 }
  61
  62                 if ($_SESSION["ref_schema_version"] != session_get_schema_version($link, true))
  63                         return false;
  64
  65                 if (sha1($_SERVER['HTTP_USER_AGENT']) != $_SESSION["user_agent"])
  66                         return false;
  67
  68                 if ($_SESSION["uid"]) {
  69                         $result = db_query($link,
  70                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  71
  72                         // user not found
  73                         if (db_num_rows($result) == 0) {
  74                                 return false;
  75                         } else {
  76                                 $pwd_hash = db_fetch_result($result, 0, "pwd_hash");
  77
  78                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  79                                         return false;
  80                                 }
  81                         }
  82                 }
  83
  84 /*              if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
  85
  86                         //print_r($_SESSION);
  87
  88                         if (time() > $_SESSION["cookie_lifetime"]) {
  89                                 return false;
  90                         }
  91                 } */
  92
  93                 return true;
  94         }
  95
  96
  97         function ttrss_open ($s, $n) {
  98                 global $session_connection;
  99
 100                 $session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
 101
 102                 return true;
 103         }
 104
 105         function ttrss_read ($id){
 106
 107                 global $session_connection,$session_read;
 108
 109                 $query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
 110
 111                 $res = db_query($session_connection, $query);
 112
 113                 if (db_num_rows($res) != 1) {
 114                         return "";
 115                 } else {
 116                         $session_read = db_fetch_assoc($res);
 117                         $session_read["data"] = base64_decode($session_read["data"]);
 118                         return $session_read["data"];
 119                 }
 120         }
 121
 122         function ttrss_write ($id, $data) {
 123
 124                 if (! $data) {
 125                         return false;
 126                 }
 127
 128                 global $session_connection, $session_read, $session_expire;
 129
 130                 $expire = time() + $session_expire;
 131
 132                 $data = db_escape_string($session_connection, base64_encode($data), false);
 133
 134                 if ($session_read) {
 135                         $query = "UPDATE ttrss_sessions SET data='$data',
 136                                         expire='$expire' WHERE id='$id'";
 137                 } else {
 138                         $query = "INSERT INTO ttrss_sessions (id, data, expire)
 139                                         VALUES ('$id', '$data', '$expire')";
 140                 }
 141
 142                 db_query($session_connection, $query);
 143                 return true;
 144         }
 145
 146         function ttrss_close () {
 147
 148                 global $session_connection;
 149
 150                 //db_close($session_connection);
 151
 152                 return true;
 153         }
 154
 155         function ttrss_destroy ($id) {
 156
 157                 global $session_connection;
 158
 159                 $query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
 160
 161                 db_query($session_connection, $query);
 162
 163                 return true;
 164         }
 165
 166         function ttrss_gc ($expire) {
 167
 168                 global $session_connection;
 169
 170                 $query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
 171
 172                 db_query($session_connection, $query);
 173         }
 174
 175         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 176                 session_set_save_handler("ttrss_open",
 177                         "ttrss_close", "ttrss_read", "ttrss_write",
 178                         "ttrss_destroy", "ttrss_gc");
 179         }
 180
 181         if (!defined('TTRSS_SESSION_NAME') || TTRSS_SESSION_NAME != 'ttrss_api_sid') {
 182                 if (isset($_COOKIE[$session_name])) {
 183                         @session_start();
 184
 185                         if (!isset($_SESSION["uid"]) || !$_SESSION["uid"] || !validate_session($session_connection)) {
 186                                 session_destroy();
 187                            setcookie(session_name(), '', time()-42000, '/');
 188                         }
 189                 }
 190         }
 191 ?>