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                 $session_name .= "_ssl";
  17                 ini_set("session.cookie_secure", true);
  18         }
  19
  20         ini_set("session.gc_probability", 75);
  21         ini_set("session.name", $session_name);
  22         ini_set("session.use_only_cookies", true);
  23         ini_set("session.gc_maxlifetime", $session_expire);
  24         ini_set("session.cookie_lifetime", min(0, SESSION_COOKIE_LIFETIME));
  25
  26         function session_get_schema_version() {
  27                 global $schema_version;
  28
  29                 if (!$schema_version) {
  30                         $row = Db::pdo()->query("SELECT schema_version FROM ttrss_version")->fetch();
  31
  32                         $version = $row["schema_version"];
  33
  34                         $schema_version = $version;
  35                         return $version;
  36                 } else {
  37                         return $schema_version;
  38                 }
  39         }
  40
  41         function validate_session() {
  42                 if (SINGLE_USER_MODE) return true;
  43
  44                 if (isset($_SESSION["ref_schema_version"]) && $_SESSION["ref_schema_version"] != session_get_schema_version()) {
  45                         $_SESSION["login_error_msg"] =
  46                                 __("Session failed to validate (schema version changed)");
  47                         return false;
  48                 }
  49         $pdo = Db::pdo();
  50
  51                 if ($_SESSION["uid"]) {
  52                         $sth = $pdo->prepare("SELECT pwd_hash FROM ttrss_users WHERE id = ?");
  53                         $sth->execute([$_SESSION['uid']]);
  54
  55                         // user not found
  56                         if ($row = $sth->fetch()) {
  57                 $pwd_hash = $row["pwd_hash"];
  58
  59                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  60
  61                     $_SESSION["login_error_msg"] =
  62                         __("Session failed to validate (password changed)");
  63
  64                     return false;
  65                 }
  66                         } else {
  67
  68                 $_SESSION["login_error_msg"] =
  69                     __("Session failed to validate (user not found)");
  70
  71                 return false;
  72
  73                         }
  74                 }
  75
  76                 return true;
  77         }
  78
  79         /**
  80          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
  81          */
  82         function ttrss_open ($s, $n) {
  83                 return true;
  84         }
  85
  86         function ttrss_read ($id){
  87                 global $session_expire;
  88
  89                 $sth = Db::pdo()->prepare("SELECT data FROM ttrss_sessions WHERE id=?");
  90                 $sth->execute([$id]);
  91
  92                 if ($row = $sth->fetch()) {
  93             return base64_decode($row["data"]);
  94
  95                 } else {
  96             $expire = time() + $session_expire;
  97
  98             $sth = Db::pdo()->prepare("INSERT INTO ttrss_sessions (id, data, expire)
  99                                         VALUES (?, '', ?)");
 100             $sth->execute([$id, $expire]);
 101
 102             return "";
 103
 104                 }
 105
 106         }
 107
 108         function ttrss_write ($id, $data) {
 109                 global $session_expire;
 110
 111                 $data = base64_encode($data);
 112                 $expire = time() + $session_expire;
 113
 114         $sth = Db::pdo()->prepare("UPDATE ttrss_sessions SET data=?, expire=? WHERE id=?");
 115         $sth->execute([$data, $expire, $id]);
 116
 117                 return true;
 118         }
 119
 120         function ttrss_close () {
 121                 return true;
 122         }
 123
 124         function ttrss_destroy($id) {
 125                 $sth = Db::pdo()->prepare("DELETE FROM ttrss_sessions WHERE id = ?");
 126                 $sth->execute([$id]);
 127
 128                 return true;
 129         }
 130
 131         /**
 132          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
 133          */
 134         function ttrss_gc ($expire) {
 135                 Db::pdo()->query("DELETE FROM ttrss_sessions WHERE expire < " . time());
 136
 137                 return true;
 138         }
 139
 140         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 141                 session_set_save_handler("ttrss_open",
 142                         "ttrss_close", "ttrss_read", "ttrss_write",
 143                         "ttrss_destroy", "ttrss_gc");
 144                 register_shutdown_function('session_write_close');
 145         }
 146
 147         if (!defined('NO_SESSION_AUTOSTART')) {
 148                 if (isset($_COOKIE[session_name()])) {
 149                         @session_start();
 150                 }
 151         }