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111 lines
3.1 KiB
111 lines
3.1 KiB
<?php
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// Set the session name.
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session_name(SESS_COOKIE);
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// Set session parameters
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session_set_cookie_params(0, JAIL_COOKIES?ROOT:'/');
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// Start the session
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session_start();
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// Session creation time
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if(!isset($_SESSION['created'])) $_SESSION['created'] = time();
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if(!isset($_COOKIE[HASH_COOKIE]) || !isset($_COOKIE[TIME_COOKIE]) || $_COOKIE[HASH_COOKIE] != md5($_COOKIE[TIME_COOKIE].SALT)) {
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$time = time();
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setcookie(TIME_COOKIE, $time, time()+COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
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setcookie(HASH_COOKIE, md5($time.SALT), $time+COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
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$user = Array('valid' => false, 'appeared' => $time);
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} else {
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$user = Array('valid' => true, 'appeared' => $_COOKIE[TIME_COOKIE]);
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}
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// 'false' means that the user is not logged in as a moderator
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$mod = false;
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// Creates a small random string for validating moderators' cookies
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function mkhash($length=12) {
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// The method here isn't really important,
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// but I think this generates a relatively
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// unique string that looks cool.
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// If you choose to change this, make sure it cannot include a ':' character.
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return substr(base64_encode(sha1(rand() . time(), true)), 0, $length);
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}
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function login($username, $password, $makehash=true) {
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global $sql, $mod;
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// SHA1 password
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if($makehash) {
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$password = sha1($password);
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}
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$res = mysql_query(sprintf(
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"SELECT `id`,`type` FROM `mods` WHERE `username` = '%s' AND `password` = '%s' LIMIT 1",
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mysql_real_escape_string($username),
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$password
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), $sql) or error(mysql_error($sql));
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if($user = mysql_fetch_array($res)) {
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return $mod = Array(
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'id' => $user['id'],
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'type' => $user['type'],
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'username' => $username,
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'password' => $password,
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'hash' => mkhash()
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);
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} else return false;
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}
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function setCookies() {
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global $mod;
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if(!$mod) error('setCookies() was called for a non-moderator!');
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// MOD_COOKIE contains username:hash
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setcookie(MOD_COOKIE, $mod['username'] . ':' . $mod['hash'], time()+COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
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// Put $mod in the session
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$_SESSION['mod'] = $mod;
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// Lock sessions to IP addresses
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if(MOD_LOCK_IP)
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$_SESSION['mod']['ip'] = $_SERVER['REMOTE_ADDR'];
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}
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function destroyCookies() {
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// Delete the cookies
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setcookie(MOD_COOKIE, 'deleted', time()-COOKIE_EXPIRE, JAIL_COOKIES?ROOT:'/', null, false, true);
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// Unset the session
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unset($_SESSION['mod']);
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}
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if(isset($_COOKIE['mod']) && isset($_SESSION['mod']) && is_array($_SESSION['mod'])) {
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// Should be username:session hash
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$cookie = explode(':', $_COOKIE['mod']);
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if(count($cookie) != 2) {
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destroyCookies();
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error(ERROR_MALFORMED);
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}
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// Validate session
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if( $cookie[0] != $_SESSION['mod']['username'] ||
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$cookie[1] != $_SESSION['mod']['hash']) {
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// Malformed cookies
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destroyCookies();
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error(ERROR_MALFORMED);
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}
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// Open connection
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sql_open();
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// Check username/password
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if(!login($_SESSION['mod']['username'], $_SESSION['mod']['password'], false)) {
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destroyCookies();
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error(ERROR_INVALIDAFTER);
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}
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$mod = $_SESSION['mod'];
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}
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?>
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