X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=inc%2Flibs%2Fsecurity_functions.php;h=b1cce1c5b323b30827b90b452d01bf66ae9f226e;hb=15b33f67108fcf717fc56fc9cb931f7c22a69737;hp=96e39998fe8a7ab061992afccee2df548db2ce40;hpb=263a089d8a499e0e26d0af9e7aa7639f88b8ca60;p=mailer.git diff --git a/inc/libs/security_functions.php b/inc/libs/security_functions.php index 96e39998fe..b1cce1c5b3 100644 --- a/inc/libs/security_functions.php +++ b/inc/libs/security_functions.php @@ -14,11 +14,10 @@ * $Date:: $ * * $Tag:: 0.2.1-FINAL $ * * $Author:: $ * - * Needs to be in all Files and every File needs "svn propset * - * svn:keywords Date Revision" (autoprobset!) at least!!!!!! * * -------------------------------------------------------------------- * * Copyright (c) 2003 - 2009 by Roland Haeder * - * For more information visit: http://www.mxchange.org * + * Copyright (c) 2009 - 2011 by Mailer Developer Team * + * For more information visit: http://mxchange.org * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * @@ -36,14 +35,19 @@ * MA 02110-1301 USA * ************************************************************************/ -// Run only once this security check/exchange -if (defined('__SECURITY')) return; +// Run only once this security check/replacement +if (defined('__SECURITY')) { + return; +} // END - if // Some security stuff... -if (ereg(basename(__FILE__), $_SERVER['PHP_SELF'])) { +if (strpos($_SERVER['PHP_SELF'], basename(__FILE__)) !== false) { die(); } // END - if +// Include ctracker, recommended place! +//require_once('ctracker.php'); + /** * Function to secure input strings * @@ -68,10 +72,78 @@ function secureString ($str, $strip = true, $encode = false) { return $str; } +/** + * Secures $_SERVER['PHP_SELF'] against attacks + * + * @return void + */ +function securePhpSelf () { + // Did it run before? + if (isset($GLOBALS['php_self_secured'])) { + // Please do not call this twice! + die('PHP_SELF is already secured. Please do not call ' . __FUNCTION__ . ' for your self.'); + } // END - if + + // Secure the string + $_SERVER['PHP_SELF'] = secureString($_SERVER['PHP_SELF']); + + // Split it up into path and filename + $phpSelfDirectory = dirname($_SERVER['PHP_SELF']); + $phpSelfFile = basename($_SERVER['PHP_SELF']); + + // Check for a .php inside the $phpSelfDirectory... + while (strpos($phpSelfDirectory, '.php') !== false) { + // Correct the dirname + $phpSelfDirectory = substr($phpSelfDirectory, 0, (strpos($phpSelfDirectory, '.php') + 4)); + // Rewrite filename... + $phpSelfFile = basename($phpSelfDirectory); + // ... and dirname + $phpSelfDirectory = dirname($phpSelfDirectory); + } // END - while + + // Put both together again and let's pray it is secured now... + $_SERVER['PHP_SELF'] = $phpSelfDirectory . '/' . $phpSelfFile; + + // Did run... + $GLOBALS['php_self_secured'] = true; + + // Remove uneccessary variables + unset($phpSelfDirectory); + unset($phpSelfFile); +} + +/** + * Detects caching in PHP + * + * @return void + */ +function detectPhpCaching () { + // Activate caching or transparent compressing when it is not already done + if (phpversion() >= '4.0.4pl1' && (strstr(getenv('HTTP_USER_AGENT'),'compatible') || (strstr(getenv('HTTP_USER_AGENT'), 'Mozilla')))) { + if ((extension_loaded('zlib')) && (function_exists('ob_start'))) { + // Start caching + $GLOBALS['php_caching'] = 'on'; + ob_start(); + } else { + // Extension not loaded or required function is missing + $GLOBALS['php_caching'] = '404'; + } + } else { + // Old PHP version + $GLOBALS['php_caching'] = 'old'; + } +} + // Runtime/GPC quoting is off now... -set_magic_quotes_runtime(false); +ini_set('magic_quotes_runtime', false); ini_set('magic_quotes_gpc', false); // This may not work on some systems +// No compatibility with Zend Engine 1, else an error like 'Implicit cloning' +// will be produced. +if (phpversion() >= '5.0') { + ini_set('zend.ze1_compatibility_mode', 'Off'); +} // END - if + // Check if important arrays are found and define them if missing if (!isset($_SERVER)) { global $_SERVER; @@ -88,17 +160,12 @@ if (!isset($_POST)) { $_POST = $GLOBALS['_POST']; } // END - if -// Include IP-Filter here -//require("/usr/share/php/ipfilter.php"); - // Generate arrays which holds the relevante chars to replace $GLOBALS['security_chars'] = array( // The chars we are looking for... - 'from' => array('{', '}', '/', '.', "'", '$', '(', ')', '{--', '--}', '{?', '?}', '%', ';', '[', ']', ':', '--'), + 'from' => array('/', '.', "'", '$', '(', ')', '{--', '--}', '{?', '?}', '%', ';', '[', ']', ':', '--', "\\"), // ... and we will replace to. 'to' => array( - '{OPEN_ANCHOR2}', - '{CLOSE_ANCHOR2}', '{SLASH}', '{DOT}', '{QUOT}', @@ -114,7 +181,8 @@ $GLOBALS['security_chars'] = array( '{OPEN_INDEX}', '{CLOSE_INDEX}', '{DBL_DOT}', - '{COMMENT}' + '{COMMENT}', + '{BACKSLASH}' ), ); @@ -137,10 +205,7 @@ if (is_array($_GET)) { unset($_GET[$seckey]); } else { // Only variables are allowed (non-array) but we secure them all! - foreach ($GLOBALS['security_chars']['from'] as $key => $char) { - // Pass all through - $_GET[$seckey] = str_replace($char , $GLOBALS['security_chars']['to'][$key], $_GET[$seckey]); - } // END - foreach + $_GET[$seckey] = str_replace($GLOBALS['security_chars']['from'], $GLOBALS['security_chars']['to'], $_GET[$seckey]); // Strip all other out $_GET[$seckey] = secureString($_GET[$seckey]); @@ -148,44 +213,23 @@ if (is_array($_GET)) { } // END - foreach } // END - if -// Activate caching or transparent compressing when it is not already done -if (phpversion() >= '4.0.4pl1' && (strstr(getenv('HTTP_USER_AGENT'),'compatible') || (strstr(getenv('HTTP_USER_AGENT'), 'Mozilla')))) { - if ((extension_loaded('zlib')) && (function_exists('ob_start'))) { - // Start caching - $GLOBALS['php_caching'] = 'on'; - ob_start(); - } else { - // Extension not loaded or required function is missing - $GLOBALS['php_caching'] = '404'; - } -} else { - // Old PHP version - $GLOBALS['php_caching'] = 'old'; -} +// Secure also $_POST data (only simple, no replace) +if (is_array($_POST)) { + // Secure only simple data + foreach ($_POST as $seckey => $secvalue) { + // Is it an array? + if (!is_array($secvalue)) { + // Strip all other out + $_POST[$seckey] = secureString($_POST[$seckey]); + } // END - if + } // END - foreach +} // END - if + +// Detect PHP caching +detectPhpCaching(); // At last secure the $_SERVER['PHP_SELF'] element -$_SERVER['PHP_SELF'] = secureString($_SERVER['PHP_SELF']); - -// Split it up into path and filename -$phpSelfDirectory = dirname($_SERVER['PHP_SELF']); -$phpSelfFile = basename($_SERVER['PHP_SELF']); - -// Check for a .php inside the $phpSelfDirectory... -while (ereg('.php', $phpSelfDirectory)) { - // Correct the dirname - $phpSelfDirectory = substr($phpSelfDirectory, 0, (strpos($phpSelfDirectory, '.php') + 4)); - // Rewrite filename... - $phpSelfFile = basename($phpSelfDirectory); - // ... and dirname - $phpSelfDirectory = dirname($phpSelfDirectory); -} // END - while - -// Put both together again and let's pray it is secured now... -$_SERVER['PHP_SELF'] = $phpSelfDirectory . '/' . $phpSelfFile; - -// Remove uneccessary variables -unset($phpSelfDirectory); -unset($phpSelfFile); +securePhpSelf(); // Security system loaded... define('__SECURITY', 1);