X-Git-Url: https://git.mxchange.org/?p=mailer.git;a=blobdiff_plain;f=inc%2Flibs%2Fsecurity_functions.php;h=c57d1e4c6eb35a638e4fdc997c61ad449847e051;hp=79599e4558dd6ace5280466af69a3b894f3ac18d;hb=0715fa7aa8e5e70bcf1d957fb09ae655c3896c4e;hpb=b5912168d72ae511eb623c3d92540c82d31b93c5

diff --git a/inc/libs/security_functions.php b/inc/libs/security_functions.php
index 79599e4558..c57d1e4c6e 100644
--- a/inc/libs/security_functions.php
+++ b/inc/libs/security_functions.php
@@ -1,7 +1,7 @@
 <?php
 /************************************************************************
- * MXChange v0.2.1                                    Start: 09/20/2005 *
- * ===============                              Last change: 09/20/2005 *
+ * Mailer v0.2.1-FINAL                                Start: 09/20/2005 *
+ * ===================                          Last change: 09/20/2005 *
  *                                                                      *
  * -------------------------------------------------------------------- *
  * File              : security_functions.php                           *
@@ -10,9 +10,15 @@
  * -------------------------------------------------------------------- *
  * Kurzbeschreibung  : Alle GET, POST und COOKIE-Daten sichern          *
  * -------------------------------------------------------------------- *
- *                                                                      *
+ * $Revision::                                                        $ *
+ * $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 - 2008 by Roland Haeder                           *
+ * Copyright (c) 2003 - 2009 by Roland Haeder                           *
+ * Copyright (c) 2009, 2010 by Mailer Developer Team                    *
  * For more information visit: http://www.mxchange.org                  *
  *                                                                      *
  * This program is free software; you can redistribute it and/or modify *
@@ -31,89 +37,147 @@
  * MA  02110-1301  USA                                                  *
  ************************************************************************/
 
+// Run only once this security check/replacement
+if (defined('__SECURITY')) return;
+
 // Some security stuff...
-if (ereg(basename(__FILE__), $_SERVER['PHP_SELF']))
-{
-	$INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), "/inc") + 4) . "/security.php";
-	require($INC);
-}
+if (strpos($_SERVER['PHP_SELF'], basename(__FILE__)) !== false) {
+	die();
+} // END - if
 
 /**
  * Function to secure input strings
  *
  * @param	$str	The unsecured string
- * @return	$str	A (hopefully) secured string against HTML and other things
+ * @param	$strip	Strip tags
+ * @return	$str	A (hopefully) secured string against XSS and other bad things
  */
-function secureString ($str) {
-	$str = trim(strip_tags($str));
-	$str = htmlentities($str, ENT_QUOTES);
-	return $str;
-}
+function secureString ($str, $strip = true, $encode = false) {
+	// Shall we strip HTML code?
+	if ($strip === true) $str = strip_tags($str);
 
-// Run only once this security check/exchange
-if (defined('__SECURITY')) return;
+	// Trim string
+	$str = trim($str);
 
-// Fatal messages goes here
-global $FATAL;
-$FATAL = array();
+	// Encode in entities if requested
+	if ($encode === true) {
+		// Encode in entities (this breakes UTF-8!)
+		$str = htmlentities($str, ENT_QUOTES);
+	} // END - if
 
-// Runtime quoting is off now...
-set_magic_quotes_runtime(false);
+	// Return result
+	return $str;
+}
 
-// Unregister all global variables because of vultures and surpress failed attemps
-@import_request_variables('');
+/**
+ * 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);
+}
 
-// Error reporting level
-@error_reporting(E_ALL | E_STRICT);
+/**
+ * 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...
+ini_set('magic_quotes_runtime', false);
+ini_set('magic_quotes_gpc', false); // This may not work on some systems
 
 // Check if important arrays are found and define them if missing
-if (!isset($_SERVER))
-{
+if (!isset($_SERVER)) {
 	global $_SERVER;
 	$_SERVER = $GLOBALS['_SERVER'];
-}
-if (!isset($_GET))
-{
+} // END - if
+
+if (!isset($_GET)) {
 	global $_GET;
 	$_GET = $GLOBALS['_GET'];
-}
-if (!isset($_POST))
-{
+} // END - if
+
+if (!isset($_POST)) {
 	global $_POST;
 	$_POST = $GLOBALS['_POST'];
-}
-if (!isset($_SESSION))
-{
-	global $_SESSION;
-	$_SESSION = $GLOBALS['_COOKIE'];
-}
+} // END - if
 
 // Include IP-Filter here
-//require("/usr/share/php/ipfilter.php");
+//include("/usr/share/php/ipfilter.php");
 
 // Generate arrays which holds the relevante chars to replace
-global $SEC_CHARS, $URL_CHARS;
-$SEC_CHARS = array(
+$GLOBALS['security_chars'] = array(
 	// The chars we are looking for...
-	'from' => array("{", "}", "/", ".", "'", "$", "(", ")", "{--", "--}", "%", ";", "[", "]", ":", "--"),
+	'from' => array('{', '}', '/', '.', "'", '$', '(', ')', '{--', '--}', '{?', '?}', '%', ';', '[', ']', ':', '--'),
 	// ... and we will replace to.
 	'to'   => array(
-		"{OPEN_ANCHOR2}",
-		"{CLOSE_ANCHOR2}",
-		"{SLASH}",
-		"{DOT}",
-		"{QUOT}",
-		"{DOLLAR}",
-		"{OPEN_ANCHOR}",
-		"{CLOSE_ANCHOR}",
-		"{OPEN_TEMPLATE}",
-		"{CLOSE_TEMPLATE}",
-		"{PER}",
-		"{SEMI}",
-		"{OPEN_INDEX}",
-		"{CLOSE_INDEX}",
-		"{DBL_DOT}",
-		"{COMMENT}"
+		'{OPEN_ANCHOR2}',
+		'{CLOSE_ANCHOR2}',
+		'{SLASH}',
+		'{DOT}',
+		'{QUOT}',
+		'{DOLLAR}',
+		'{OPEN_ANCHOR}',
+		'{CLOSE_ANCHOR}',
+		'{OPEN_TEMPLATE}',
+		'{CLOSE_TEMPLATE}',
+		'{OPEN_CONFIG}',
+		'{CLOSE_CONFIG}',
+		'{PER}',
+		'{SEMI}',
+		'{OPEN_INDEX}',
+		'{CLOSE_INDEX}',
+		'{DBL_DOT}',
+		'{COMMENT}'
 	),
 );
 
@@ -121,130 +185,40 @@ $SEC_CHARS = array(
 //
 // Note: Do not replace 'to' with 'from' and vise-versa! When you do this all booked URLs will be
 //       rejected because of the {SLASH}, {DOT} and all below listed items inside the URL.
-$URL_CHARS = array(
+$GLOBALS['url_chars'] = array(
 	// Search for these secured characters
-	'to'   => array("{SLASH}", "{DOT}", "{PER}", "{DBL_DOT}", "{COMMENT}"),
+	'to'   => array('{SLASH}', '{DOT}', '{PER}', '{DBL_DOT}', '{COMMENT}'),
 	// Replace with these characters
-	'from' => array("/", ".", "%", ":", "--")
+	'from' => array('/', '.', '%', ':', '--')
 );
 
 // Overworked security part:
 if (is_array($_GET)) {
-	foreach ($_GET as $seckey=>$secvalue)
-	{
-		if (is_array($secvalue))
-		{
+	foreach ($_GET as $seckey => $secvalue) {
+		if (is_array($secvalue)) {
 			// Throw arrays away...
 			unset($_GET[$seckey]);
-		}
-		 else
-		{
+		} else {
 			// Only variables are allowed (non-array) but we secure them all!
-			foreach ($SEC_CHARS['from'] as $key=>$char)
-			{
+			foreach ($GLOBALS['security_chars']['from'] as $key => $char) {
 				// Pass all through
-				$_GET[$seckey] = str_replace($char  , $SEC_CHARS['to'][$key], $_GET[$seckey]);
-			}
+				$_GET[$seckey] = str_replace($char  , $GLOBALS['security_chars']['to'][$key], $_GET[$seckey]);
+			} // END - foreach
 
 			// Strip all other out
-			$_GET[$seckey] = strip_tags($_GET[$seckey]);
+			$_GET[$seckey] = secureString($_GET[$seckey]);
 		}
-	}
-}
-
-if (basename($_SERVER['PHP_SELF']) != "install.php")
-{
-	// And POST data
-	foreach ($_POST as $seckey=>$secvalue)
-	{
-		if (!is_array($secvalue))
-		{
-			// Only variables are allowed (non-array) to be secured...
-			foreach ($SEC_CHARS['from'] as $key=>$char)
-			{
-				// Pass all through
-				$_POST[$seckey] = str_replace($char  , $SEC_CHARS['to'][$key], $_POST[$seckey]);
-			}
-
-			// Strip all other out
-			$_POST[$seckey] = strip_tags($_POST[$seckey]);
-		}
-	}
+	} // END - foreach
+} // END - if
 
-	// ... and finally cookies
-	foreach ($_SESSION as $seckey=>$secvalue)
-	{
-		if (is_array($secvalue))
-		{
-			// Throw arrays away...
-			unset($_SESSION[$seckey]);
-		}
-		 else
-		{
-			// Only variables are allowed (non-array) but we secure them all!
-			foreach ($SEC_CHARS['from'] as $key=>$char)
-			{
-				// Pass all through
-				$_SESSION[$seckey] = str_replace($char  , $SEC_CHARS['to'][$key], $_SESSION[$seckey]);
-			}
-
-			// Strip all other out
-			$_SESSION[$seckey] = strip_tags($_SESSION[$seckey]);
-		}
-	}
-}
-
-// Activate caching or transparent compressing when it is not already done
-if (!defined('_OB_CACHING'))
-{
-	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
-			define('_OB_CACHING', "on");
-			ob_start();
-		}
-		 else
-		{
-			// Extension not loaded or required function is missing
-			define('_OB_CACHING', "404");
-		}
-	}
-	 else
-	{
-		// Old PHP version
-		define('_OB_CACHING', "old");
-	}
-}
+// Detect PHP caching
+detectPhpCaching();
 
 // At last secure the $_SERVER['PHP_SELF'] element
-$_SERVER['PHP_SELF'] = secureString($_SERVER['PHP_SELF']);
-
-// Split it up into path and filename
-$SELF_DIR  = dirname($_SERVER['PHP_SELF']);
-$SELF_FILE = basename($_SERVER['PHP_SELF']);
-
-// Check for a .php inside the $SELF_DIR...
-while (ereg(".php", $SELF_DIR))
-{
-	// Correct the dirname
-	$SELF_DIR = substr($SELF_DIR, 0, (strpos($SELF_DIR, ".php") + 4));
-	// Rewrite filename...
-	$SELF_FILE = basename($SELF_DIR);
-	// ... and dirname
-	$SELF_DIR = dirname($SELF_DIR);
-}
-
-// Put both together again and let's pray it is secured now...
-$_SERVER['PHP_SELF'] = $SELF_DIR."/".$SELF_FILE;
-
-// Remove uneccessary variables
-unset($SELF_DIR);
-unset($SELF_FILE);
+securePhpSelf();
 
 // Security system loaded...
-define('__SECURITY', "1");
+define('__SECURITY', 1);
 
-//
+// [EOF]
 ?>