300 lines
8.1 KiB
PHP
300 lines
8.1 KiB
PHP
<?php
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/**
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* globals.php
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*
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* Copyright (c) 1999-2003 The SquirrelMail Project Team
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* Licensed under the GNU GPL. For full terms see the file COPYING.
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*
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* This includes code to update < 4.1.0 globals to the newer format
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* It also has some session register functions that work across various
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* php versions.
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*
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* $Id$
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*/
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require_once(SM_PATH . 'config/config.php');
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/* set the name of the session cookie */
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if(isset($session_name) && $session_name) {
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ini_set('session.name' , $session_name);
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} else {
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ini_set('session.name' , 'SQMSESSID');
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}
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/* If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways.
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* Force magic_quotes_runtime off.
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* chilts@birdbrained.org - I put it here in the hopes that all SM code includes this.
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* If there's a better place, please let me know.
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*/
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ini_set('magic_quotes_runtime','0');
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/* convert old-style superglobals to current method
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* this is executed if you are running PHP 4.0.x.
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* it is run via a require_once directive in validate.php
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* and redirect.php. Patch submitted by Ray Black.
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*/
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if ( !check_php_version(4,1) ) {
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global $_COOKIE, $_ENV, $_FILES, $_GET, $_POST, $_SERVER, $_SESSION;
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global $HTTP_COOKIE_VARS, $HTTP_ENV_VARS, $HTTP_POST_FILES, $HTTP_GET_VARS,
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$HTTP_POST_VARS, $HTTP_SERVER_VARS, $HTTP_SESSION_VARS, $PHP_SELF;
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$_COOKIE =& $HTTP_COOKIE_VARS;
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$_ENV =& $HTTP_ENV_VARS;
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$_FILES =& $HTTP_POST_FILES;
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$_GET =& $HTTP_GET_VARS;
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$_POST =& $HTTP_POST_VARS;
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$_SERVER =& $HTTP_SERVER_VARS;
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$_SESSION =& $HTTP_SESSION_VARS;
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if (!isset($PHP_SELF) || empty($PHP_SELF)) {
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$PHP_SELF = $HTTP_SERVER_VARS['PHP_SELF'];
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}
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}
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/* if running with magic_quotes_gpc then strip the slashes
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from POST and GET global arrays */
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if (get_magic_quotes_gpc()) {
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sqstripslashes($_GET);
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sqstripslashes($_POST);
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}
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/* strip any tags added to the url from PHP_SELF.
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This fixes hand crafted url XXS expoits for any
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page that uses PHP_SELF as the FORM action */
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$_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']);
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/**
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* returns true if current php version is at mimimum a.b.c
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*
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* Called: check_php_version(4,1)
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*/
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function check_php_version ($a = '0', $b = '0', $c = '0')
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{
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global $SQ_PHP_VERSION;
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if(!isset($SQ_PHP_VERSION))
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$SQ_PHP_VERSION = substr( str_pad( preg_replace('/\D/','', PHP_VERSION), 3, '0'), 0, 3);
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return $SQ_PHP_VERSION >= ($a.$b.$c);
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}
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/**
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* returns true if the current internal SM version is at minimum a.b.c
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* These are plain integer comparisons, as our internal version is
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* constructed by us, as an array of 3 ints.
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*
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* Called: check_sm_version(1,3,3)
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*/
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function check_sm_version($a = 0, $b = 0, $c = 0)
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{
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global $SQM_INTERNAL_VERSION;
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if ( !isset($SQM_INTERNAL_VERSION) ||
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$SQM_INTERNAL_VERSION[0] < $a ||
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$SQM_INTERNAL_VERSION[1] < $b ||
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( $SQM_INTERNAL_VERSION[1] == $b &&
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$SQM_INTERNAL_VERSION[2] < $c ) ) {
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return FALSE;
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}
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return TRUE;
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}
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/* recursively strip slashes from the values of an array */
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function sqstripslashes(&$array) {
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if(count($array) > 0) {
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foreach ($array as $index=>$value) {
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if (is_array($array[$index])) {
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sqstripslashes($array[$index]);
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}
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else {
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$array[$index] = stripslashes($value);
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}
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}
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}
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}
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function sqsession_register ($var, $name) {
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sqsession_is_active();
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if ( !check_php_version(4,1) ) {
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global $HTTP_SESSION_VARS;
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$HTTP_SESSION_VARS[$name] = $var;
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}
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else {
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$_SESSION["$name"] = $var;
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}
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session_register("$name");
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}
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function sqsession_unregister ($name) {
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sqsession_is_active();
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if ( !check_php_version(4,1) ) {
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global $HTTP_SESSION_VARS;
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unset($HTTP_SESSION_VARS[$name]);
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}
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else {
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unset($_SESSION[$name]);
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}
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session_unregister("$name");
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}
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function sqsession_is_registered ($name) {
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$test_name = &$name;
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$result = false;
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if ( !check_php_version(4,1) ) {
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global $HTTP_SESSION_VARS;
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if (isset($HTTP_SESSION_VARS[$test_name])) {
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$result = true;
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}
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}
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else {
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if (isset($_SESSION[$test_name])) {
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$result = true;
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}
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}
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return $result;
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}
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define('SQ_INORDER',0);
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define('SQ_GET',1);
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define('SQ_POST',2);
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define('SQ_SESSION',3);
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define('SQ_COOKIE',4);
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define('SQ_SERVER',5);
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define('SQ_FORM',6);
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/**
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* Search for the var $name in $_SESSION, $_POST, $_GET,
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* $_COOKIE, or $_SERVER and set it in provided var.
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*
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* If $search is not provided, or == SQ_INORDER, it will search
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* $_SESSION, then $_POST, then $_GET. Otherwise,
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* use one of the defined constants to look for
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* a var in one place specifically.
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*
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* Note: $search is an int value equal to one of the
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* constants defined above.
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*
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* example:
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* sqgetGlobalVar('username',$username,SQ_SESSION);
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* -- no quotes around last param!
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*
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* Returns FALSE if variable is not found.
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* Returns TRUE if it is.
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*/
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function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) {
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if ( !check_php_version(4,1) ) {
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global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $HTTP_POST_VARS,
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$HTTP_SERVER_VARS, $HTTP_SESSION_VARS;
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$_COOKIE =& $HTTP_COOKIE_VARS;
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$_GET =& $HTTP_GET_VARS;
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$_POST =& $HTTP_POST_VARS;
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$_SERVER =& $HTTP_SERVER_VARS;
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$_SESSION =& $HTTP_SESSION_VARS;
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}
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/* NOTE: DO NOT enclose the constants in the switch
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statement with quotes. They are constant values,
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enclosing them in quotes will cause them to evaluate
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as strings. */
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switch ($search) {
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/* we want the default case to be first here,
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so that if a valid value isn't specified,
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all three arrays will be searched. */
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default:
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case SQ_INORDER: // check session, post, get
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case SQ_SESSION:
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if( isset($_SESSION[$name]) ) {
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$value = $_SESSION[$name];
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return TRUE;
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} elseif ( $search == SQ_SESSION ) {
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break;
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}
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case SQ_FORM: // check post, get
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case SQ_POST:
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if( isset($_POST[$name]) ) {
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$value = $_POST[$name];
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return TRUE;
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} elseif ( $search == SQ_POST ) {
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break;
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}
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case SQ_GET:
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if ( isset($_GET[$name]) ) {
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$value = $_GET[$name];
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return TRUE;
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}
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/* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */
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break;
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case SQ_COOKIE:
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if ( isset($_COOKIE[$name]) ) {
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$value = $_COOKIE[$name];
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return TRUE;
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}
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break;
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case SQ_SERVER:
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if ( isset($_SERVER[$name]) ) {
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$value = $_SERVER[$name];
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return TRUE;
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}
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break;
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}
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return FALSE;
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}
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function sqsession_destroy() {
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/*
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* php.net says we can kill the cookie by setting just the name:
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* http://www.php.net/manual/en/function.setcookie.php
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* maybe this will help fix the session merging again.
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*
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* Changed the theory on this to kill the cookies first starting
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* a new session will provide a new session for all instances of
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* the browser, we don't want that, as that is what is causing the
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* merging of sessions.
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*/
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global $base_uri;
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if (isset($_COOKIE[session_name()])) setcookie(session_name(), '', time() - 5, $base_uri);
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if (isset($_COOKIE['username'])) setcookie('username','',time() - 5,$base_uri);
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if (isset($_COOKIE['key'])) setcookie('key','',time() - 5,$base_uri);
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$sessid = session_id();
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if (!empty( $sessid )) {
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if ( !check_php_version(4,1) ) {
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global $HTTP_SESSION_VARS;
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$HTTP_SESSION_VARS = array();
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} else {
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$_SESSION = array();
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}
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@session_destroy();
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}
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}
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/*
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* Function to verify a session has been started. If it hasn't
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* start a session up. php.net doesn't tell you that $_SESSION
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* (even though autoglobal), is not created unless a session is
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* started, unlike $_POST, $_GET and such
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*/
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function sqsession_is_active() {
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$sessid = session_id();
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if ( empty( $sessid ) ) {
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session_start();
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}
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}
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?>
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