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         require_once "version.php";
   9
  10         $session_expire = max(SESSION_COOKIE_LIFETIME, 86400);
  11         $session_name = (!defined('TTRSS_SESSION_NAME')) ? "ttrss_sid" : TTRSS_SESSION_NAME;
  12
  13         if (@$_SERVER['HTTPS'] == "on") {
  14                 $session_name .= "_ssl";
  15                 ini_set("session.cookie_secure", true);
  16         }
  17
  18         ini_set("session.gc_probability", 50);
  19         ini_set("session.name", $session_name);
  20         ini_set("session.use_only_cookies", true);
  21         ini_set("session.gc_maxlifetime", $session_expire);
  22
  23         global $session_connection;
  24
  25         function session_get_schema_version($link, $nocache = false) {
  26                 global $schema_version;
  27
  28                 if (!$schema_version) {
  29                         $result = db_query($link, "SELECT schema_version FROM ttrss_version");
  30                         $version = db_fetch_result($result, 0, "schema_version");
  31                         $schema_version = $version;
  32                         return $version;
  33                 } else {
  34                         return $schema_version;
  35                 }
  36         }
  37
  38         function validate_session($link) {
  39                 if (SINGLE_USER_MODE) return true;
  40                 if (!$link) return false;
  41
  42                 if (VERSION != $_SESSION["version"]) return false;
  43
  44                 $check_ip = $_SESSION['ip_address'];
  45
  46                 switch (SESSION_CHECK_ADDRESS) {
  47                 case 0:
  48                         $check_ip = '';
  49                         break;
  50                 case 1:
  51                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  52                         break;
  53                 case 2:
  54                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.'));
  55                         $check_ip = substr($check_ip, 0, strrpos($check_ip, '.')+1);
  56                         break;
  57                 };
  58
  59                 if ($check_ip && strpos($_SERVER['REMOTE_ADDR'], $check_ip) !== 0) {
  60                         $_SESSION["login_error_msg"] =
  61                                 __("Session failed to validate (incorrect IP)");
  62                         return false;
  63                 }
  64
  65                 if ($_SESSION["ref_schema_version"] != session_get_schema_version($link, true))
  66                         return false;
  67
  68                 if (sha1($_SERVER['HTTP_USER_AGENT']) != $_SESSION["user_agent"])
  69                         return false;
  70
  71                 if ($_SESSION["uid"]) {
  72                         $result = db_query($link,
  73                                 "SELECT pwd_hash FROM ttrss_users WHERE id = '".$_SESSION["uid"]."'");
  74
  75                         // user not found
  76                         if (db_num_rows($result) == 0) {
  77                                 return false;
  78                         } else {
  79                                 $pwd_hash = db_fetch_result($result, 0, "pwd_hash");
  80
  81                                 if ($pwd_hash != $_SESSION["pwd_hash"]) {
  82                                         return false;
  83                                 }
  84                         }
  85                 }
  86
  87 /*              if ($_SESSION["cookie_lifetime"] && $_SESSION["uid"]) {
  88
  89                         //print_r($_SESSION);
  90
  91                         if (time() > $_SESSION["cookie_lifetime"]) {
  92                                 return false;
  93                         }
  94                 } */
  95
  96                 return true;
  97         }
  98
  99
 100         function ttrss_open ($s, $n) {
 101                 global $session_connection;
 102
 103                 $session_connection = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
 104
 105                 return true;
 106         }
 107
 108         function ttrss_read ($id){
 109
 110                 global $session_connection,$session_read;
 111
 112                 $query = "SELECT data FROM ttrss_sessions WHERE id='$id'";
 113
 114                 $res = db_query($session_connection, $query);
 115
 116                 if (db_num_rows($res) != 1) {
 117                         return "";
 118                 } else {
 119                         $session_read = db_fetch_assoc($res);
 120                         $session_read["data"] = base64_decode($session_read["data"]);
 121                         return $session_read["data"];
 122                 }
 123         }
 124
 125         function ttrss_write ($id, $data) {
 126
 127                 if (! $data) {
 128                         return false;
 129                 }
 130
 131                 global $session_connection, $session_read, $session_expire;
 132
 133                 $expire = time() + $session_expire;
 134
 135                 $data = db_escape_string($session_connection, base64_encode($data), false);
 136
 137                 if ($session_read) {
 138                         $query = "UPDATE ttrss_sessions SET data='$data',
 139                                         expire='$expire' WHERE id='$id'";
 140                 } else {
 141                         $query = "INSERT INTO ttrss_sessions (id, data, expire)
 142                                         VALUES ('$id', '$data', '$expire')";
 143                 }
 144
 145                 db_query($session_connection, $query);
 146                 return true;
 147         }
 148
 149         function ttrss_close () {
 150
 151                 global $session_connection;
 152
 153                 //db_close($session_connection);
 154
 155                 return true;
 156         }
 157
 158         function ttrss_destroy ($id) {
 159
 160                 global $session_connection;
 161
 162                 $query = "DELETE FROM ttrss_sessions WHERE id = '$id'";
 163
 164                 db_query($session_connection, $query);
 165
 166                 return true;
 167         }
 168
 169         function ttrss_gc ($expire) {
 170
 171                 global $session_connection;
 172
 173                 $query = "DELETE FROM ttrss_sessions WHERE expire < " . time();
 174
 175                 db_query($session_connection, $query);
 176         }
 177
 178         if (!SINGLE_USER_MODE /* && DB_TYPE == "pgsql" */) {
 179                 session_set_save_handler("ttrss_open",
 180                         "ttrss_close", "ttrss_read", "ttrss_write",
 181                         "ttrss_destroy", "ttrss_gc");
 182         }
 183
 184         if (!defined('TTRSS_SESSION_NAME') || TTRSS_SESSION_NAME != 'ttrss_api_sid') {
 185                 if (isset($_COOKIE[$session_name])) {
 186                         @session_start();
 187                 }
 188         }
 189 ?>