X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;ds=sidebyside;f=functions%2Fglobal.php;h=38f3be89f5bf8111e0c4daeb9187157a88435a16;hb=1eebcf25072674e039edd33904c6f700441a7722;hp=699dec037d99302781abae15f0dd0aeb9ebb565c;hpb=a32985a59fe460e2bf5c2e9ea2dd6004d0f66b54;p=squirrelmail.git diff --git a/functions/global.php b/functions/global.php index 699dec03..38f3be89 100644 --- a/functions/global.php +++ b/functions/global.php @@ -3,16 +3,31 @@ /** * globals.php * - * Copyright (c) 1999-2002 The SquirrelMail Project Team + * Copyright (c) 1999-2003 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 two session register functions that work across various + * It also has some session register functions that work across various * php versions. * - * $Id $ + * $Id$ */ +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. + * chilts@birdbrained.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'); /* convert old-style superglobals to current method * this is executed if you are running PHP 4.0.x. @@ -20,7 +35,7 @@ * and redirect.php. Patch submitted by Ray Black. */ -if ( (float)substr(PHP_VERSION,0,3) < 4.1 ) { +if ( !check_php_version(4,1) ) { global $_COOKIE, $_ENV, $_FILES, $_GET, $_POST, $_SERVER, $_SESSION; global $HTTP_COOKIE_VARS, $HTTP_ENV_VARS, $HTTP_POST_FILES, $HTTP_GET_VARS, $HTTP_POST_VARS, $HTTP_SERVER_VARS, $HTTP_SESSION_VARS; @@ -33,61 +48,188 @@ if ( (float)substr(PHP_VERSION,0,3) < 4.1 ) { $_SESSION =& $HTTP_SESSION_VARS; } -/* if running with register_globals = 0 and - magic_quotes_gpc then strip the slashes +/* if running with magic_quotes_gpc then strip the slashes from POST and GET global arrays */ if (get_magic_quotes_gpc()) { - if (ini_get('register_globals') == 0) { - sqstripslashes($_GET); - sqstripslashes($_POST); - } + sqstripslashes($_GET); + sqstripslashes($_POST); } /* strip any tags added to the url from PHP_SELF. This fixes hand crafted url XXS expoits for any page that uses PHP_SELF as the FORM action */ -strip_tags($_SERVER['PHP_SELF']); +$_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); + +/** + * returns true if current php version is at mimimum a.b.c + * + * Called: check_php_version(4,1) + */ +function check_php_version ($a = '0', $b = '0', $c = '0') +{ + global $SQ_PHP_VERSION; + + if(!isset($SQ_PHP_VERSION)) + $SQ_PHP_VERSION = substr( str_pad( preg_replace('/\D/','', PHP_VERSION), 3, '0'), 0, 3); + + return $SQ_PHP_VERSION >= ($a.$b.$c); +} + +/** + * returns true if the current internal SM version is at minimum a.b.c + * These are plain integer comparisons, as our internal version is + * constructed by us, as an array of 3 ints. + * + * Called: check_sm_version(1,3,3) + */ +function check_sm_version($a = 0, $b = 0, $c = 0) +{ + global $SQM_INTERNAL_VERSION; + if ( !isset($SQM_INTERNAL_VERSION) || + $SQM_INTERNAL_VERSION[0] < $a || + $SQM_INTERNAL_VERSION[1] < $b || + ( $SQM_INTERNAL_VERSION[1] == $b && + $SQM_INTERNAL_VERSION[2] < $c ) ) { + return FALSE; + } + return TRUE; +} + +/* recursively strip slashes from the values of an array */ function sqstripslashes(&$array) { - foreach ($array as $index=>$value) { - if (is_array($array["$index"])) { - sqstripslashes($array["$index"]); - } - else { - $array["$index"] = stripslashes($value); + if(count($array) > 0) { + foreach ($array as $index=>$value) { + if (is_array($array[$index])) { + sqstripslashes($array[$index]); + } + else { + $array[$index] = stripslashes($value); + } } } } function sqsession_register ($var, $name) { - $rg = ini_get('register_globals'); - if ( (float)substr(PHP_VERSION,0,3) < 4.1 && empty($rg)) { + + sqsession_is_active(); + + if ( !check_php_version(4,1) ) { global $HTTP_SESSION_VARS; - $HTTP_SESSION_VARS["$name"] = $var; + $HTTP_SESSION_VARS[$name] = $var; } else { - session_register("$name"); + $_SESSION["$name"] = $var; } + session_register("$name"); } + function sqsession_unregister ($name) { - $rg = ini_get('register_globals'); - if ( (float)substr(PHP_VERSION,0,3) < 4.1 && empty($rg)) { - global $HTTP_SESSION_VARS; - unset($HTTP_SESSION_VARS["$name"]); + + sqsession_is_active(); + + if ( !check_php_version(4,1) ) { + global $HTTP_SESSION_VARS; + unset($HTTP_SESSION_VARS[$name]); } else { - session_unregister("$name"); + unset($_SESSION[$name]); } + session_unregister("$name"); } +function sqsession_is_registered ($name) { + $test_name = &$name; + $result = false; + if ( !check_php_version(4,1) ) { + global $HTTP_SESSION_VARS; + if (isset($HTTP_SESSION_VARS[$test_name])) { + $result = true; + } + } + else { + if (isset($_SESSION[$test_name])) { + $result = true; + } + } + 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); + +/** + * 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 $_GET. Otherwise, + * use one of the defined constants to look for + * a var in one place specifically. + * Returns FALSE if variable is not found. + * Returns TRUE if it is. + */ +function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { + if ( !check_php_version(4,1) ) { + global $_SESSION, $_GET, $_POST, $_COOKIE, $_SERVER; + } + + switch ($search) { + /* we want the default case to be first here, + so that if a valid value isn't specified, + all three arrays will be searched. */ + default: + case 'SQ_INORDER': + case 'SQ_SESSION': + if( isset($_SESSION[$name]) ) { + $value = $_SESSION[$name]; + return TRUE; + } elseif ( $search == SQ_SESSION ) { + break; + } + case 'SQ_POST': + if( isset($_POST[$name]) ) { + $value = $_POST[$name]; + return TRUE; + } elseif ( $search == SQ_POST ) { + break; + } + case 'SQ_GET': + if ( isset($_GET[$name]) ) { + $value = $_GET[$name]; + return TRUE; + } + /* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */ + break; + case 'SQ_COOKIE': + if ( isset($_COOKIE[$name]) ) { + $value = $_COOKIE[$name]; + return TRUE; + } + break; + case 'SQ_SERVER': + if ( isset($_SERVER[$name]) ) { + $value = $_SERVER[$name]; + return TRUE; + } + break; + } + return FALSE; +} + + /** * Search for the var $name in $_SESSION, $_POST, $_GET * (in that order) and register it as a global var. */ function sqextractGlobalVar ($name) { - if ( (float)substr(PHP_VERSION,0,3) < 4.1 ) { + if ( !check_php_version(4,1) ) { global $_SESSION, $_GET, $_POST; } global $$name; @@ -101,4 +243,53 @@ function sqextractGlobalVar ($name) { $$name = $_GET[$name]; } } + +function sqsession_destroy() { + + /* + * php.net says we can kill the cookie by setting just the name: + * http://www.php.net/manual/en/function.setcookie.php + * maybe this will help fix the session merging again. + * + * Changed the theory on this to kill the cookies first starting + * a new session will provide a new session for all instances of + * the browser, we don't want that, as that is what is causing the + * merging of sessions. + */ + + 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); + + $sessid = session_id(); + if (!empty( $sessid )) { + if ( !check_php_version(4,1) ) { + global $HTTP_SESSION_VARS; + $HTTP_SESSION_VARS = array(); + } else { + $_SESSION = array(); + } + @session_destroy; + } + +} + +/* + * Function to verify a session has been started. If it hasn't + * start a session up. php.net doesn't tell you that $_SESSION + * (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(); + } +} + + ?>