X-Git-Url: https://vcs.fsf.org/?p=squirrelmail.git;a=blobdiff_plain;f=functions%2Fglobal.php;h=e40dffba416f3cec70994df79bc0c99f4b21a9c7;hp=7b47de742fe23d99015314b5675a4d621e926bfe;hb=8ca9f6621bf47bea9c512a1e9b25b6dd7e689774;hpb=6c84ba1ec45ab854c37b6f65c5b4d84ab1c7aad4 diff --git a/functions/global.php b/functions/global.php index 7b47de74..e40dffba 100644 --- a/functions/global.php +++ b/functions/global.php @@ -3,57 +3,26 @@ /** * global.php * - * Copyright (c) 1999-2005 The SquirrelMail Project Team - * Licensed under the GNU GPL. For full terms see the file COPYING. - * * This includes code to update < 4.1.0 globals to the newer format * It also has some session register functions that work across various * php versions. * + * @copyright © 1999-2006 The SquirrelMail Project Team + * @license http://opensource.org/licenses/gpl-license.php GNU Public License * @version $Id$ * @package squirrelmail */ -/** Bring in the config file. */ -require_once(SM_PATH . 'config/config.php'); - -/** set the name of the session cookie */ -if(isset($session_name) && $session_name) { - ini_set('session.name' , $session_name); -} else { - ini_set('session.name' , 'SQMSESSID'); -} - /** - * If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways. - * Force magic_quotes_runtime off. - * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this. - * If there's a better place, please let me know. */ -ini_set('magic_quotes_runtime','0'); - -/* Since we decided all IMAP servers must implement the UID command as defined in - * the IMAP RFC, we force $uid_support to be on. - */ - -global $uid_support; -$uid_support = true; - -sqsession_is_active(); - -/* if running with magic_quotes_gpc then strip the slashes - from POST and GET global arrays */ - -if (get_magic_quotes_gpc()) { - sqstripslashes($_GET); - sqstripslashes($_POST); -} - -/* strip any tags added to the url from PHP_SELF. - This fixes hand crafted url XXS expoits for any - page that uses PHP_SELF as the FORM action */ +define('SQ_INORDER',0); +define('SQ_GET',1); +define('SQ_POST',2); +define('SQ_SESSION',3); +define('SQ_COOKIE',4); +define('SQ_SERVER',5); +define('SQ_FORM',6); -$_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); /** * returns true if current php version is at mimimum a.b.c @@ -160,42 +129,30 @@ function sqsession_is_registered ($name) { return $result; } - -define('SQ_INORDER',0); -define('SQ_GET',1); -define('SQ_POST',2); -define('SQ_SESSION',3); -define('SQ_COOKIE',4); -define('SQ_SERVER',5); -define('SQ_FORM',6); - /** - * Search for the var $name in $_SESSION, $_POST, $_GET, - * $_COOKIE, or $_SERVER and set it in provided var. + * Search for the var $name in $_SESSION, $_POST, $_GET, $_COOKIE, or $_SERVER + * and set it in provided var. * - * If $search is not provided, or == SQ_INORDER, it will search - * $_SESSION, then $_POST, then $_GET. Otherwise, - * use one of the defined constants to look for - * a var in one place specifically. + * If $search is not provided, or if it is SQ_INORDER, it will search $_SESSION, + * then $_POST, then $_GET. If $search is SQ_FORM it will search $_POST and + * $_GET. Otherwise, use one of the defined constants to look for a var in one + * place specifically. * - * Note: $search is an int value equal to one of the - * constants defined above. + * Note: $search is an int value equal to one of the constants defined above. * - * example: - * sqgetGlobalVar('username',$username,SQ_SESSION); - * -- no quotes around last param! + * Example: + * sqgetGlobalVar('username',$username,SQ_SESSION); + * // No quotes around last param, it's a constant - not a string! * * @param string name the name of the var to search * @param mixed value the variable to return * @param int search constant defining where to look * @return bool whether variable is found. */ -function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { +function sqgetGlobalVar($name, &$value, $search = SQ_INORDER, $default = NULL, $typecast = false) { + + $result = false; - /* NOTE: DO NOT enclose the constants in the switch - statement with quotes. They are constant values, - enclosing them in quotes will cause them to evaluate - as strings. */ switch ($search) { /* we want the default case to be first here, so that if a valid value isn't specified, @@ -205,7 +162,8 @@ function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { case SQ_SESSION: if( isset($_SESSION[$name]) ) { $value = $_SESSION[$name]; - return TRUE; + $result = TRUE; + break; } elseif ( $search == SQ_SESSION ) { break; } @@ -213,31 +171,44 @@ function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { case SQ_POST: if( isset($_POST[$name]) ) { $value = $_POST[$name]; - return TRUE; + $result = TRUE; + break; } elseif ( $search == SQ_POST ) { break; } case SQ_GET: if ( isset($_GET[$name]) ) { $value = $_GET[$name]; - return TRUE; + $result = TRUE; + break; } /* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */ break; case SQ_COOKIE: if ( isset($_COOKIE[$name]) ) { $value = $_COOKIE[$name]; - return TRUE; + $result = TRUE; + break; } break; case SQ_SERVER: if ( isset($_SERVER[$name]) ) { $value = $_SERVER[$name]; - return TRUE; + $result = TRUE; + break; } break; } - return FALSE; + if ($result && $typecast) { + switch ($typecast) { + case 'int': $value = (int) $value; break; + case 'bool': $value = (bool) $value; break; + default: break; + } + } else if (!is_null($default)) { + $value = $default; + } + return $result; } /** @@ -259,16 +230,15 @@ function sqsession_destroy() { global $base_uri; - if (isset($_COOKIE[session_name()])) setcookie(session_name(), '', time() - 5, $base_uri); - if (isset($_COOKIE['username'])) setcookie('username','',time() - 5,$base_uri); - if (isset($_COOKIE['key'])) setcookie('key','',time() - 5,$base_uri); + if (isset($_COOKIE[session_name()])) sqsetcookie(session_name(), '', 0, $base_uri); + if (isset($_COOKIE['username'])) sqsetcookie('username','',0,$base_uri); + if (isset($_COOKIE['key'])) sqsetcookie('key','',0,$base_uri); $sessid = session_id(); if (!empty( $sessid )) { $_SESSION = array(); @session_destroy(); } - } /** @@ -277,14 +247,176 @@ function sqsession_destroy() { * (even though autoglobal), is not created unless a session is * started, unlike $_POST, $_GET and such */ - function sqsession_is_active() { - $sessid = session_id(); if ( empty( $sessid ) ) { - session_start(); + sqsession_start(); } } -// vim: et ts=4 -?> \ No newline at end of file +/** + * Function to start the session and store the cookie with the session_id as + * HttpOnly cookie which means that the cookie isn't accessible by javascript + * (IE6 only) + */ +function sqsession_start() { + global $base_uri; + + session_start(); + $session_id = session_id(); + + // session_starts sets the sessionid cookie buth without the httponly var + // setting the cookie again sets the httponly cookie attribute + + // disable, @see sqsetcookie and php 5.1.2 + // sqsetcookie(session_name(),session_id(),false,$base_uri); +} + + +/** + * Set a cookie + * @param string $sName The name of the cookie. + * @param string $sValue The value of the cookie. + * @param int $iExpire The time the cookie expires. This is a Unix timestamp so is in number of seconds since the epoch. + * @param string $sPath The path on the server in which the cookie will be available on. + * @param string $sDomain The domain that the cookie is available. + * @param boolean $bSecure Indicates that the cookie should only be transmitted over a secure HTTPS connection. + * @param boolean $bHttpOnly Disallow JS to access the cookie (IE6 only) + * @return void + */ +function sqsetcookie($sName,$sValue,$iExpire=false,$sPath="",$sDomain="",$bSecure=false,$bHttpOnly=true,$bFlush=false) { + static $sCookieCache; + if (!isset($sCache)) { + $sCache = ''; + } + /** + * We have to send all cookies with one header call otherwise we loose cookies. + * In order to achieve that the sqsetcookieflush function calls this function with $bFlush = true. + * If that happens we send the cookie header. + */ + if ($bFlush) { + // header($sCookieCache); + return; + } + if (!$sName) return; + + // php 5.1.2 and 4.4.2 do not allow to send multiple headers at once. + // Because that's the only way to get this thing working we fallback to + // setcookie until we solved this + if ($iExpire===false) $iExpire = 0; + setcookie($sName, $sValue, $iExpire, $sPath); + return; + + $sHeader = "Set-Cookie: $sName=$sValue"; + if ($sPath) { + $sHeader .= "; path=$sPath"; + } + if ($iExpire !== false) { + $sHeader .= "; Max-Age=$iExpire"; + // php uses Expire header, also add the expire header + $sHeader .= "; expires=". gmdate('D, d-M-Y H:i:s T',$iExpire); + } + if ($sDomain) { + $sHeader .= "; Domain=$sDomain"; + } + // TODO: IE for Mac (5.2) thinks that semicolon is part of cookie domain + if ($bSecure) { + $sHeader .= "; Secure"; + } + if ($bHttpOnly) { + $sHeader .= "; HttpOnly"; + } + // $sHeader .= "; Version=1"; + $sCookieCache .= $sHeader ."\r\n"; + //header($sHeader."\r\n"); +} + +/** + * Send the cookie header + * + * Cookies set with sqsetcookie will bet set after a sqsetcookieflush call. + * @return void + */ +function sqsetcookieflush() { + sqsetcookie('','','','','','','',true); +} + +/** + * session_regenerate_id replacement for PHP < 4.3.2 + * + * This code is borrowed from Gallery, session.php version 1.53.2.1 + */ +if (!function_exists('session_regenerate_id')) { + function make_seed() { + list($usec, $sec) = explode(' ', microtime()); + return (float)$sec + ((float)$usec * 100000); + } + + function php_combined_lcg() { + mt_srand(make_seed()); + $tv = gettimeofday(); + $lcg['s1'] = $tv['sec'] ^ (~$tv['usec']); + $lcg['s2'] = mt_rand(); + $q = (int) ($lcg['s1'] / 53668); + $lcg['s1'] = (int) (40014 * ($lcg['s1'] - 53668 * $q) - 12211 * $q); + if ($lcg['s1'] < 0) { + $lcg['s1'] += 2147483563; + } + $q = (int) ($lcg['s2'] / 52774); + $lcg['s2'] = (int) (40692 * ($lcg['s2'] - 52774 * $q) - 3791 * $q); + if ($lcg['s2'] < 0) { + $lcg['s2'] += 2147483399; + } + $z = (int) ($lcg['s1'] - $lcg['s2']); + if ($z < 1) { + $z += 2147483562; + } + return $z * 4.656613e-10; + } + + function session_regenerate_id() { + global $base_uri; + $tv = gettimeofday(); + sqgetGlobalVar('REMOTE_ADDR',$remote_addr,SQ_SERVER); + $buf = sprintf("%.15s%ld%ld%0.8f", $remote_addr, $tv['sec'], $tv['usec'], php_combined_lcg() * 10); + session_id(md5($buf)); + if (ini_get('session.use_cookies')) { + // at a later stage we use sqsetcookie. At this point just do + // what session_regenerate_id would do + setcookie(session_name(), session_id(), NULL, $base_uri); + } + return TRUE; + } +} + + +/** + * php_self + * + * Creates an URL for the page calling this function, using either the PHP global + * REQUEST_URI, or the PHP global PHP_SELF with QUERY_STRING added. Before 1.5.1 + * function was stored in function/strings.php. + * + * @return string the complete url for this page + * @since 1.2.3 + */ +function php_self () { + if ( sqgetGlobalVar('REQUEST_URI', $req_uri, SQ_SERVER) && !empty($req_uri) ) { + return $req_uri; + } + + if ( sqgetGlobalVar('PHP_SELF', $php_self, SQ_SERVER) && !empty($php_self) ) { + + // need to add query string to end of PHP_SELF to match REQUEST_URI + // + if ( sqgetGlobalVar('QUERY_STRING', $query_string, SQ_SERVER) && !empty($query_string) ) { + $php_self .= '?' . $query_string; + } + + return $php_self; + } + + return ''; +} + +