include/sessions.php

   1 <?php
   2         // Original from http://www.daniweb.com/code/snippet43.html
   3
   4         require_once "config.php";
   5         require_once "classes/db.php";
   6         require_once "autoload.php";
   7         require_once "errorhandler.php";
   8         require_once "lib/accept-to-gettext.php";
   9         require_once "lib/gettext/gettext.inc";
  10         require_once "version.php";
  11
  12         $session_expire = min(2147483647 - time() - 1, max(SESSION_COOKIE_LIFETIME, 86400));
  13         $session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
  14
  15         if (is_server_https()) {
  16                 ini_set("session.cookie_secure", true);
  17         }
  18
  19         ini_set("session.gc_probability", 75);
  20         ini_set("session.name", $session_name);
  21         ini_set("session.use_only_cookies", true);
  22         ini_set("session.gc_maxlifetime", $session_expire);
  23         ini_set("session.cookie_lifetime", min(0, SESSION_COOKIE_LIFETIME));
  24
  25         function session_get_schema_version() {
  26                 global $schema_version;
  27
  28                 if (!$schema_version) {
  29                         $row = Db::pdo()->query("SELECT schema_version FROM ttrss_version")->fetch();
  30
  31                         $version = $row["schema_version"];
  32
  33                         $schema_version = $version;
  34                         return $version;
  35                 } else {
  36                         return $schema_version;
  37                 }
  38         }
  39
  40         function validate_session() {
  41                 if (SINGLE_USER_MODE) return true;
  42
  43                 if (isset($_SESSION["ref_schema_version"]) && $_SESSION["ref_schema_version"] != session_get_schema_version()) {
  44                         $_SESSION["login_error_msg"] =
  45                                 __("Session failed to validate (schema version changed)");
  46                         return false;
  47                 }
  48         $pdo = Db::pdo();
  49
  50                 if ($_SESSION["uid"]) {
  51
  52                         if (!defined('_SKIP_SESSION_ADDRESS_CHECKS') || !_SKIP_SESSION_ADDRESS_CHECKS) {
  53                                 if ($_SESSION["ip_address"] != $_SERVER["REMOTE_ADDR"]) {
  54                                         $_SESSION["login_error_msg"] = __("Session failed to validate.");
  55                                         return false;
  56                                 }
  57                         }
  58
  59                         if ($_SESSION["user_agent"] != sha1($_SERVER['HTTP_USER_AGENT'])) {
  60                                 $_SESSION["login_error_msg"] = __("Session failed to validate.");
  61                                 return false;
  62                         }
  63
  64                         $sth = $pdo->prepare("SELECT pwd_hash FROM ttrss_users WHERE id = ?");
  65                         $sth->execute([$_SESSION['uid']]);
  66
  67                         // user not found
  68                         if ($row = $sth->fetch()) {
  69                 $pwd_hash = $row["pwd_hash"];
  70
  71                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  72
  73                     $_SESSION["login_error_msg"] =
  74                         __("Session failed to validate (password changed)");
  75
  76                     return false;
  77                 }
  78                         } else {
  79
  80                 $_SESSION["login_error_msg"] =
  81                     __("Session failed to validate (user not found)");
  82
  83                 return false;
  84
  85                         }
  86                 }
  87
  88                 return true;
  89         }
  90
  91         /**
  92          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
  93          */
  94         function ttrss_open ($s, $n) {
  95                 return true;
  96         }
  97
  98         function ttrss_read ($id){
  99                 global $session_expire;
 100
 101                 $sth = Db::pdo()->prepare("SELECT data FROM ttrss_sessions WHERE id=?");
 102                 $sth->execute([$id]);
 103
 104                 if ($row = $sth->fetch()) {
 105             return base64_decode($row["data"]);
 106
 107                 } else {
 108             $expire = time() + $session_expire;
 109
 110             $sth = Db::pdo()->prepare("INSERT INTO ttrss_sessions (id, data, expire)
 111                                         VALUES (?, '', ?)");
 112             $sth->execute([$id, $expire]);
 113
 114             return "";
 115
 116                 }
 117
 118         }
 119
 120         function ttrss_write ($id, $data) {
 121                 global $session_expire;
 122
 123                 $data = base64_encode($data);
 124                 $expire = time() + $session_expire;
 125
 126         $sth = Db::pdo()->prepare("UPDATE ttrss_sessions SET data=?, expire=? WHERE id=?");
 127         $sth->execute([$data, $expire, $id]);
 128
 129                 return true;
 130         }
 131
 132         function ttrss_close () {
 133                 return true;
 134         }
 135
 136         function ttrss_destroy($id) {
 137                 $sth = Db::pdo()->prepare("DELETE FROM ttrss_sessions WHERE id = ?");
 138                 $sth->execute([$id]);
 139
 140                 return true;
 141         }
 142
 143         /**
 144          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
 145          */
 146         function ttrss_gc ($expire) {
 147                 Db::pdo()->query("DELETE FROM ttrss_sessions WHERE expire < " . time());
 148
 149                 return true;
 150         }
 151
 152         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 153                 session_set_save_handler("ttrss_open",
 154                         "ttrss_close", "ttrss_read", "ttrss_write",
 155                         "ttrss_destroy", "ttrss_gc");
 156                 register_shutdown_function('session_write_close');
 157         }
 158
 159         if (!defined('NO_SESSION_AUTOSTART')) {
 160                 if (isset($_COOKIE[session_name()])) {
 161                         @session_start();
 162                 }
 163         }