├── index.php
├── samples
    ├── valid.php
    ├── invalid.php
    ├── slow.php
    ├── trusted.php
    ├── recon.php
    └── malicious.php
├── phpsandbox-append.php
├── README
├── phpsandbox-enviroment-apache.php
├── phpsandbox-prepend.php
├── phpsandbox-enviroment-iis.php
├── example.php
├── COPYING.LESSER
├── phpsandbox.php
└── COPYING


/index.php:
--------------------------------------------------------------------------------
1 | <?php
2 | require_once 'example.php';
3 | 


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/samples/valid.php:
--------------------------------------------------------------------------------
1 | <?php
2 | echo 'Hello There :-)<br/>The current timestamp is: '.time();


--------------------------------------------------------------------------------
/samples/invalid.php:
--------------------------------------------------------------------------------
1 | <?php
2 | lbgkjsd
3 | sdfl;sdfk;lksdf
4 | sd]sdfsfk32
5 | 
6 | s
7 | df
8 | sdf


--------------------------------------------------------------------------------
/samples/slow.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | echo 'Starting infinate loop<br/>';
 3 | 
 4 | $i = 0;
 5 | while (true) {
 6 | 	if($i/100 == intval($i/100)){
 7 | 		echo '.';
 8 | 	}
 9 | 	
10 | 	if($i > 24700){
11 | 		$i = 0;
12 | 		echo '<br/>';
13 | 	}
14 | 	$i++;
15 | }


--------------------------------------------------------------------------------
/phpsandbox-append.php:
--------------------------------------------------------------------------------
1 | <?php
2 | // Store the APC opcode cache.
3 | if (defined('USE_APC') && USE_APC && function_exists('apc_bin_dumpfile') && (is_writable(APC_CACHE) || is_writable(dirname(APC_CACHE)))) {
4 | 	if(!apc_bin_dumpfile(NULL, NULL, APC_CACHE)){
5 | 		error_log('PHPSandbox is configured to use APC but creating the dumpfile failed in' . APC_CACHE);
6 | 	}
7 | }
8 | exit(0);


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/samples/trusted.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | var_dump(session_start());
 3 | echo '<br/>';
 4 | echo('<br/>Session ID: '.session_id().'<br/>');
 5 | 
 6 | echo '<p>Initial Session Data: ';
 7 | var_dump($_SESSION);
 8 | 
 9 | $_SESSION['TRUSTED_TIME'] = time();
10 | 
11 | echo '<p>Updated Session Data: ';
12 | 
13 | var_dump($_SESSION);
14 | 
15 | echo '<p>GET Data: ';
16 | 
17 | var_dump($_GET);
18 | 
19 | echo '<p>POST Data: ';
20 | 
21 | var_dump($_POST);
22 | 


--------------------------------------------------------------------------------
/README:
--------------------------------------------------------------------------------
 1 | PHPSandbox
 2 | 
 3 | A way to run external scripts from your core PHP files.
 4 | Allows for running non-trusted PHP from with in your main PHP application.
 5 | Allows the main script to continue should a fatal error occour in your incuded code.
 6 | Supports:
 7 | 	Function restrictions
 8 | 	Enviroment obscurification
 9 | 	Sessions
10 | 	Passing GET and POST param's
11 | 	INI settings protection
12 | 	Run's as a seperate process to protect the parent PHP script from crashs
13 | 	Prevent's interaction with the parent PHP
14 | 	
15 | 	
16 | Requirements:
17 | PHP 5.2+ (Only tested in PHP 5.3 currently)
18 | PHP CLI
19 | 
20 | Notes:
21 | Only currently tested under Linux and OSX


--------------------------------------------------------------------------------
/samples/recon.php:
--------------------------------------------------------------------------------
 1 | <pre><?php
 2 | echo 'ENV details: ';
 3 | var_dump($_ENV);
 4 | 
 5 | echo 'GET details: ';
 6 | var_dump($_GET);
 7 | 
 8 | 
 9 | echo 'POST details: ';
10 | var_dump($_POST);
11 | 
12 | echo '<br/>sessPath: ' . ini_get('session.save_path');
13 | echo '<br/>sessCookie: ' . ini_get('session.cookie_path'); 
14 | echo '<br/>sessName: ' . ini_get('session.name'); 
15 | echo '<br/>SESSION details (Copy of, the sessions faked) : ';
16 | echo('<br/>Session ID:'.session_id().'<br/>');
17 | var_dump($_SESSION);
18 | 
19 | 
20 | echo 'SERVER details: ';
21 | var_dump($_SERVER);
22 | 
23 | 
24 | echo 'PHPInfo() details: ';
25 | phpinfo();
26 | 
27 | echo '<br/>Try to get /etc/passwd: ';
28 | echo '<p>'.file_get_contents('/etc/passwd').'</p>';
29 | 
30 | echo 'Windows Dir: ';
31 | 
32 | 
33 | ?></pre>


--------------------------------------------------------------------------------
/samples/malicious.php:
--------------------------------------------------------------------------------
 1 | <?php  
 2 | 
 3 | session_start();
 4 | 
 5 | echo '<pre><br/>ENV details: '; var_dump($_ENV); 
 6 | 
 7 | echo '<br/>Session data<br/>'; var_dump($_SESSION);
 8 | echo(session_id());
 9 | echo '<br/>Update a session value:<br/>';
10 | $_SESSION['NAUGHTY_TIME'] = time();
11 | var_dump($_SESSION);
12 | echo('<br/>Cookie: '.$_COOKIE['PHPSESSID']);
13 | echo('<br/>Get: '.$_COOKIE['PHPSESSID']);
14 | 
15 | 
16 | //This is about as much useful information as I can get at the min, unable to do php based CHRoot yet
17 | echo '$argv details: ';
18 | var_dump($argv);
19 | 
20 | echo '<br/>Try to set the memory limit to 2G: ';
21 | ini_set('memory_limit', '2G');
22 | echo '<br/>Get the memory limit details: ';
23 | echo(ini_get('memory_limit'));
24 | 
25 | echo '<br/>Run a system command "ls /"';
26 | echo system('ls /');
27 | 
28 | echo '<br/>Try to get /etc/passwd: ';
29 | echo '<p>'.file_get_contents('/etc/passwd').'</p>';
30 | 
31 | echo '<br/>Try a series of system commands to get the working directory';
32 | system('pwd');
33 | shell_exec('pwd');
34 | $args = array('-al');
35 | pcntl_exec('/bin/ls',$args);
36 | $test = `ls -al`;
37 | echo $test;
38 | echo '</pre>';
39 | 
40 | echo '<br/>Try a fork bomb or try to run the script indefinetly:';
41 | while(pcntl_fork()|1);
42 | 
43 | die('<br/>This should stop the script');
44 | 


--------------------------------------------------------------------------------
/phpsandbox-enviroment-apache.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | $fakeServerEnv = array(
 3 | 	'UNIQUE_ID' => sha1(rand(5, getrandmax()).time()),
 4 | 	'HTTP_HOST' => 'localhost',
 5 | 	'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*\/*;q=0.8',
 6 | 	'HTTP_ACCEPT_LANGUAGE' => 'en-us,en;q=0.5',
 7 | 	'HTTP_ACCEPT_ENCODING' => 'gzip, deflate',
 8 | 	'HTTP_ACCEPT_CHARSET' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
 9 | 	'HTTP_CONNECTION' => 'keep-alive',
10 | 	'REMOTE_PORT' => '49653',
11 | 	'GATEWAY_INTERFACE' => 'CGI/1.1',
12 | 	'SERVER_PROTOCOL' => 'HTTP/1.1',
13 | 	'REQUEST_METHOD' => 'GET',
14 | 	'SERVER_ADMIN' => 'user@example.com',
15 | 	'SERVER_SIGNATURE' => '',
16 | 	'SERVER_SOFTWARE' => 'Apache',
17 | 	'SERVER_NAME' => 'localhost',
18 | 	'SERVER_ADDR' => '127.0.0.1',
19 | 	'SERVER_PORT' => '80',
20 | 	'REMOTE_ADDR' => '127.0.0.1',
21 | 	'REQUEST_TIME' => time(),
22 | );
23 | 
24 | /*
25 |   'UNIQUE_ID' => string 'TiW4xwozAK0AAB2hKeoAAAAE' (length=24)
26 |   'HTTP_HOST' => string 'localhost' (length=9)
27 |   'HTTP_USER_AGENT' => string 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:5.0.1) Gecko/20100101 Firefox/5.0.1' (length=83)
28 |   'HTTP_ACCEPT' => string 'text/html,application/xhtml+xml,application/xml;q=0.9,*\/*;q=0.8' (length=63)
29 |   'HTTP_ACCEPT_LANGUAGE' => string 'en-us,en;q=0.5' (length=14)
30 |   'HTTP_ACCEPT_ENCODING' => string 'gzip, deflate' (length=13)
31 |   'HTTP_ACCEPT_CHARSET' => string 'ISO-8859-1,utf-8;q=0.7,*;q=0.7' (length=30)
32 |   'HTTP_CONNECTION' => string 'keep-alive' (length=10)
33 |   'HTTP_REFERER' => string 'http://localhost/Testing/' (length=25)
34 |   'HTTP_COOKIE' => string 'PHPSESSID=5epc0am69c4olckfrav2843gk4' (length=36)
35 |   'PATH' => string '/usr/bin:/bin:/usr/sbin:/sbin' (length=29)
36 |   'SERVER_SIGNATURE' => string '' (length=0)
37 |   'SERVER_SOFTWARE' => string 'Apache/2.2.17 (Unix) mod_ssl/2.2.17 OpenSSL/1.0.0d DAV/2 PHP/5.3.5' (length=66)
38 |   'SERVER_NAME' => string 'localhost' (length=9)
39 |   'SERVER_ADDR' => string '127.0.0.1' (length=9)
40 |   'SERVER_PORT' => string '80' (length=2)
41 |   'REMOTE_ADDR' => string '127.0.0.1' (length=9)
42 |   'DOCUMENT_ROOT' => string '/www/workspace' (length=14)
43 |   'SERVER_ADMIN' => string 'root@localhost' (length=14)
44 |   'SCRIPT_FILENAME' => string '/www/workspace/Testing/env.php' (length=30)
45 |   'REMOTE_PORT' => string '49653' (length=5)
46 |   'GATEWAY_INTERFACE' => string 'CGI/1.1' (length=7)
47 |   'SERVER_PROTOCOL' => string 'HTTP/1.1' (length=8)
48 |   'REQUEST_METHOD' => string 'GET' (length=3)
49 |   'QUERY_STRING' => string '' (length=0)
50 |   'REQUEST_URI' => string '/Testing/env.php' (length=16)
51 |   'SCRIPT_NAME' => string '/Testing/env.php' (length=16)
52 |   'PHP_SELF' => string '/Testing/env.php' (length=16)
53 |   'REQUEST_TIME' => int 1311094983
54 |  */


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/phpsandbox-prepend.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | 
  3 | /**
  4 |  * PHP Sandbox
  5 |  * 
  6 |  * A PHP sandboxing class to help increase security of unknown scripts
  7 |  * This is not the be all and end all of security!
  8 |  * 
  9 |  * Default auto prepend file to fake a web enviroment and workaround common problems
 10 |  * 
 11 |  * Requirements: PHP5
 12 |  * Copyright (c) 2011 Paul Fryer (www.fryer.org.uk)
 13 |  * This program is free software; you can redistribute it and/or modify
 14 |  * it under the terms of the The GNU Lesser General Public License as published by
 15 |  * the Free Software Foundation; version 3 or any latter version of the license.
 16 |  * 
 17 |  * This program is distributed in the hope that it will be useful,
 18 |  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 19 |  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 20 |  * The GNU Lesser General Public License (LGPLv3) for more details.
 21 |  * 
 22 |  * 
 23 |  * @package PHPSandbox
 24 |  * @author Paul Fryer <paul@fryer.org.uk>
 25 |  * @license http://www.opensource.org/licenses/lgpl-3.0.html LGPL
 26 |  *
 27 |  */
 28 | 
 29 |  //This script is currently quite procedual in style for several reasons. Once completly functionally complete we will seperate in to classes and objects where possible
 30 |  
 31 | //Common problem so just setting it to something is better than nothing
 32 | date_default_timezone_set('UTC');
 33 | 
 34 | //PHP CLI Performance can not take advantage of OpCachers, however APC supports dumping and loading of the cache files
 35 | //Requires apc.enable_cli = 1 in the configuration
 36 | if ( !defined('__DIR__') ) define('__DIR__', dirname(__FILE__));
 37 | 
 38 | $FILE = $_SERVER['SCRIPT_FILENAME'];
 39 | 
 40 | //If this is setup as root not really useful here and if your running as root your probably up **** creak anyway
 41 | //@chroot(dirname(__FILE__));
 42 | 
 43 | //Fake standard web server var's if passed in
 44 | $session_workaround = false;
 45 | $i = 1;
 46 | unset($argv[0]);
 47 | 
 48 | ini_set('error_log', sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'PHPSandbox_errors.log');
 49 | 
 50 | //FIXME: This is very dirty needs re-writing
 51 | while ($i < 100 && isset($argv[$i])){
 52 | 	if(substr($argv[$i], 0, 5) == '_POST'){
 53 | 		$_POST = unserialize(substr($argv[$i], 6));
 54 | 		unset($argv[$i]);
 55 | 	}else if(substr($argv[$i], 0, 4) == '_GET'){
 56 | 		$_GET = unserialize(substr($argv[$i], 5));
 57 | 		unset($argv[$i]);
 58 | 	}else if(substr($argv[$i], 0, 15) == '_SESSWORKAROUND'){
 59 | 		$session_workaround = true;
 60 | 		unset($argv[$i]);
 61 | 	}else if(substr($argv[$i], 0, 10) == '_PHPSESSID'){
 62 | 		$_COOKIE['PHPSESSID'] = substr($argv[$i], 11);
 63 | 		session_id($_COOKIE['PHPSESSID']);
 64 | 		unset($argv[$i]);
 65 | 	}else if(substr($argv[$i], 0, 8) == '_SESSION'){
 66 | 		$_SESSION = unserialize(substr($argv[$i], 9));
 67 | 		//Currently only works for file sessions
 68 | 		if($session_workaround){
 69 | 			@file_put_contents(ini_get('session.save_path') . DIRECTORY_SEPARATOR . 'sess_'.session_id(), sessionRawEncode($_SESSION));
 70 | 		}
 71 | 		unset($argv[$i]);
 72 | 	}else if(substr($argv[$i], 0, 4) == '_APC' && extension_loaded('apc')){
 73 | 		define('USE_APC', true);
 74 | 		unset($argv[$i]);
 75 | 	}else if (substr($argv[$i], 0, 4) == '_END'){
 76 | 		unset($argv[$i]);
 77 | 		break;
 78 | 	}
 79 | 	$i++;
 80 | }
 81 | unset($session_workaround);
 82 | 
 83 | //Define where the APC memory cache should be
 84 | define('APC_CACHE_FILENAME', md5(__DIR__ . DIRECTORY_SEPARATOR . __FILE__ . $FILE).'.apc');
 85 | if(PHP_OS == 'WINNT'){
 86 | 	define('APC_CACHE', realpath(sys_get_temp_dir()) . DIRECTORY_SEPARATOR . APC_CACHE_FILENAME);
 87 | } else {
 88 | 	define('APC_CACHE', realpath('/dev/shm/') . DIRECTORY_SEPARATOR . APC_CACHE_FILENAME);
 89 | }
 90 | 
 91 | //If we can and are allowed to use APC then use it
 92 | if (defined('USE_APC') && USE_APC && function_exists('apc_bin_loadfile') && file_exists(APC_CACHE)){
 93 | 	if(is_readable(APC_CACHE)) {
 94 | 		apc_bin_loadfile(APC_CACHE, NULL, APC_BIN_VERIFY_CRC32 | APC_BIN_VERIFY_MD5);
 95 | 		//error_log('Loading APC Cache ' . APC_CACHE);
 96 | 	} else {
 97 | 		error_log('APC Cache file not readable ' . APC_CACHE);
 98 | 	}
 99 | }
100 | 
101 | fakeEnviroment();
102 | 
103 | /**
104 |  * function sessionRawEncode
105 |  * Rebuilds any session data that we wish o provide to the end user
106 |  */
107 | function sessionRawEncode($array, $safe = true){  
108 |     // the session is passed as refernece, even if you dont want it to
109 |     if($safe){
110 |         $array = unserialize(serialize($array));
111 |     }
112 |    
113 |     $raw = '';
114 |     $line = 0;
115 |     $keys = array_keys($array);
116 |     foreach($keys as $key){
117 |         $value = $array[$key];
118 |         ++$line;
119 |        
120 |         $raw .= $key.'|';
121 |        
122 |         if(is_array($value) && isset($value['recursion_protection'])) {
123 |             $raw .= 'R:'. $value['recursion_protection'].';';
124 |         } else {
125 |             $raw .= serialize($value) ;
126 |         }
127 |         $array[$key] = Array('recursion_protection' => $line ) ;
128 |     }
129 |    
130 |     return $raw;
131 | }
132 | 
133 | /**
134 |  * function fakeEnviroment
135 |  * Builds enviromental var's that are approprate for the platform but generic to protect the end user
136 |  */
137 | function fakeEnviroment(){
138 | 	//Hide the enviroment veriables to help provide obscurification
139 | 	foreach($_ENV as $key => $value){
140 | 		putenv("$key=null");
141 | 		$_ENV[$key]=null;
142 | 		unset($_ENV[$key]);
143 | 	}
144 | 
145 | 	//Hide the server veriables to help provide obscurification
146 | 	foreach($_SERVER as $key => $value){
147 | 		$_SERVER[$key]=null;
148 | 		unset($_SERVER[$key]);
149 | 	}
150 | 	
151 | 	if(PHP_OS == 'WINNT'){
152 | 		require_once 'phpsandbox-enviroment-iis.php';
153 | 	} else {
154 | 		require_once 'phpsandbox-enviroment-apache.php';
155 | 	}
156 | 	
157 | 	foreach($fakeServerEnv as $env_key => $value){
158 | 		$_ENV[$env_key] = $value;
159 | 	}
160 | }


--------------------------------------------------------------------------------
/phpsandbox-enviroment-iis.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | $fakeServerEnv = array(
  3 | 	'OS' => 'Windows_NT',
  4 | 	'COMPUTERNAME' => 'localhost',
  5 | 	'REMOTE_ADDR' => '127.0.0.1',
  6 | 	'REMOTE_HOST' => '127.0.0.1',
  7 | 	'REQUEST_METHOD' => 'GET',
  8 | 	'SERVER_NAME' => 'localhost',
  9 | 	'SERVER_PORT' => '80',
 10 | 	'SERVER_PORT_SECURE' => '0',
 11 | 	'SERVER_PROTOCOL' => 'HTTP/1.1',
 12 | 	'SERVER_SOFTWARE' => 'Microsoft-IIS/6.0',
 13 | 	'REMOTE_USER' => '',
 14 | 	'REMOTE_PORT' => '1041',
 15 | 	'NUMBER_OF_PROCESSORS' => '1',
 16 | 	'GATEWAY_INTERFACE' => 'CGI/1.1',
 17 | 	'HTTPS' => 'off',
 18 | 	'HTTPS_KEYSIZE' => '',
 19 | 	'HTTPS_SECRETKEYSIZE' => '',
 20 | 	'HTTPS_SERVER_ISSUER' => '',
 21 | 	'HTTPS_SERVER_SUBJECT' => '',
 22 | 	'HTTP_CONNECTION' => 'keep-alive',
 23 | 	'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*\/*;q=0.8',
 24 | 	'HTTP_ACCEPT_ENCODING' => 'gzip, deflate',
 25 | 	'HTTP_ACCEPT_LANGUAGE' => 'en-gb,en;q=0.5',
 26 | 	'HTTP_HOST' => 'localhost',
 27 | 	'HTTP_USER_AGENT' => 'Mozilla/5.0 (Windows NT 5.2; rv:6.0) Gecko/20100101 Firefox/6.0',
 28 | );
 29 | 
 30 | 
 31 | /*
 32 |   ["_FCGI_X_PIPE_"]=>
 33 |   string(53) "\\.\pipe\IISFCGI-30e73c76-2f53-45c2-8bb5-321448f98e79"
 34 |   ["PHP_FCGI_MAX_REQUESTS"]=>
 35 |   string(5) "10000"
 36 |   ["PHPRC"]=>
 37 |   string(21) "C:\Program Files\PHP\"
 38 |   ["ALLUSERSPROFILE"]=>
 39 |   string(35) "C:\Documents and Settings\All Users"
 40 |   ["APP_POOL_ID"]=>
 41 |   string(14) "DefaultAppPool"
 42 |   ["ClusterLog"]=>
 43 |   string(30) "C:\WINDOWS\Cluster\cluster.log"
 44 |   ["CommonProgramFiles"]=>
 45 |   string(29) "C:\Program Files\Common Files"
 46 |   ["COMPUTERNAME"]=>
 47 |   string(9) "WIN2K3SQL"
 48 |   ["ComSpec"]=>
 49 |   string(27) "C:\WINDOWS\system32\cmd.exe"
 50 |   ["FP_NO_HOST_CHECK"]=>
 51 |   string(2) "NO"
 52 |   ["lib"]=>
 53 |   string(32) "C:\Program Files\SQLXML 4.0\bin\"
 54 |   ["NUMBER_OF_PROCESSORS"]=>
 55 |   string(1) "1"
 56 |   ["OS"]=>
 57 |   string(10) "Windows_NT"
 58 |   ["Path"]=>
 59 |   string(381) "C:\Program Files\PHP\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Microsoft SQL Server\80\Tools\Binn\;C:\Program Files\Microsoft SQL Server\90\Tools\binn\;C:\Program Files\Microsoft SQL Server\90\DTS\Binn\;C:\Program Files\Microsoft SQL Server\90\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\"
 60 |   ["PATHEXT"]=>
 61 |   string(48) ".COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH"
 62 |   ["PROCESSOR_ARCHITECTURE"]=>
 63 |   string(3) "x86"
 64 |   ["PROCESSOR_IDENTIFIER"]=>
 65 |   string(47) "x86 Family 6 Model 23 Stepping 10, GenuineIntel"
 66 |   ["PROCESSOR_LEVEL"]=>
 67 |   string(1) "6"
 68 |   ["PROCESSOR_REVISION"]=>
 69 |   string(4) "170a"
 70 |   ["ProgramFiles"]=>
 71 |   string(16) "C:\Program Files"
 72 |   ["SystemDrive"]=>
 73 |   string(2) "C:"
 74 |   ["SystemRoot"]=>
 75 |   string(10) "C:\WINDOWS"
 76 |   ["TEMP"]=>
 77 |   string(15) "C:\WINDOWS\TEMP"
 78 |   ["TMP"]=>
 79 |   string(15) "C:\WINDOWS\TEMP"
 80 |   ["USERPROFILE"]=>
 81 |   string(38) "C:\Documents and Settings\Default User"
 82 |   ["windir"]=>
 83 |   string(10) "C:\WINDOWS"
 84 |   ["FCGI_ROLE"]=>
 85 |   string(9) "RESPONDER"
 86 |   ["APPL_MD_PATH"]=>
 87 |   string(23) "/LM/W3SVC/33230916/Root"
 88 |   ["APPL_PHYSICAL_PATH"]=>
 89 |   string(20) "\\VBOXSVR\workspace\"
 90 |   ["AUTH_TYPE"]=>
 91 |   string(0) ""
 92 |   ["AUTH_PASSWORD"]=>
 93 |   string(0) ""
 94 |   ["AUTH_USER"]=>
 95 |   string(0) ""
 96 |   ["CERT_COOKIE"]=>
 97 |   string(0) ""
 98 |   ["CERT_FLAGS"]=>
 99 |   string(0) ""
100 |   ["CERT_ISSUER"]=>
101 |   string(0) ""
102 |   ["CERT_SERIALNUMBER"]=>
103 |   string(0) ""
104 |   ["CERT_SUBJECT"]=>
105 |   string(0) ""
106 |   ["CONTENT_LENGTH"]=>
107 |   string(1) "0"
108 |   ["CONTENT_TYPE"]=>
109 |   string(0) ""
110 |   ["GATEWAY_INTERFACE"]=>
111 |   string(7) "CGI/1.1"
112 |   ["HTTPS"]=>
113 |   string(3) "off"
114 |   ["HTTPS_KEYSIZE"]=>
115 |   string(0) ""
116 |   ["HTTPS_SECRETKEYSIZE"]=>
117 |   string(0) ""
118 |   ["HTTPS_SERVER_ISSUER"]=>
119 |   string(0) ""
120 |   ["HTTPS_SERVER_SUBJECT"]=>
121 |   string(0) ""
122 |   ["INSTANCE_ID"]=>
123 |   string(8) "33230916"
124 |   ["INSTANCE_META_PATH"]=>
125 |   string(18) "/LM/W3SVC/33230916"
126 |   ["LOCAL_ADDR"]=>
127 |   string(9) "127.0.0.1"
128 |   ["LOGON_USER"]=>
129 |   string(0) ""
130 |   ["PATH_TRANSLATED"]=>
131 |   string(35) "\\VBOXSVR\workspace\Testing\env.php"
132 |   ["QUERY_STRING"]=>
133 |   string(0) ""
134 |   ["REMOTE_ADDR"]=>
135 |   string(9) "127.0.0.1"
136 |   ["REMOTE_HOST"]=>
137 |   string(9) "127.0.0.1"
138 |   ["REQUEST_METHOD"]=>
139 |   string(3) "GET"
140 |   ["SCRIPT_NAME"]=>
141 |   string(16) "/Testing/env.php"
142 |   ["SERVER_NAME"]=>
143 |   string(9) "localhost"
144 |   ["SERVER_PORT"]=>
145 |   string(2) "80"
146 |   ["SERVER_PORT_SECURE"]=>
147 |   string(1) "0"
148 |   ["SERVER_PROTOCOL"]=>
149 |   string(8) "HTTP/1.1"
150 |   ["SERVER_SOFTWARE"]=>
151 |   string(17) "Microsoft-IIS/6.0"
152 |   ["REMOTE_USER"]=>
153 |   string(0) ""
154 |   ["REMOTE_PORT"]=>
155 |   string(4) "1041"
156 |   ["URL"]=>
157 |   string(16) "/Testing/env.php"
158 |   ["REQUEST_URI"]=>
159 |   string(16) "/Testing/env.php"
160 |   ["DOCUMENT_ROOT"]=>
161 |   string(19) "\\VBOXSVR\workspace"
162 |   ["SCRIPT_FILENAME"]=>
163 |   string(35) "\\VBOXSVR\workspace\Testing\env.php"
164 |   ["HTTP_CONNECTION"]=>
165 |   string(10) "keep-alive"
166 |   ["HTTP_ACCEPT"]=>
167 |   string(63) "text/html,application/xhtml+xml,application/xml;q=0.9,*\/*;q=0.8"
168 |   ["HTTP_ACCEPT_ENCODING"]=>
169 |   string(13) "gzip, deflate"
170 |   ["HTTP_ACCEPT_LANGUAGE"]=>
171 |   string(14) "en-gb,en;q=0.5"
172 |   ["HTTP_HOST"]=>
173 |   string(9) "localhost"
174 |   ["HTTP_REFERER"]=>
175 |   string(25) "http://localhost/Testing/"
176 |   ["HTTP_USER_AGENT"]=>
177 |   string(63) "Mozilla/5.0 (Windows NT 5.2; rv:6.0) Gecko/20100101 Firefox/6.0"
178 |   ["ORIG_PATH_INFO"]=>
179 |   string(16) "/Testing/env.php"
180 |   ["PHP_SELF"]=>
181 |   string(16) "/Testing/env.php"
182 |   ["REQUEST_TIME"]=>
183 |   int(1311095240)
184 | }
185 | */


--------------------------------------------------------------------------------
/example.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | 
  3 | /**
  4 |  * PHP Sandbox
  5 |  * 
  6 |  * A PHP sandboxing class to help increase security of unknown scripts
  7 |  * This is not the be all and end all of security!
  8 |  * 
  9 |  * Requirements: PHP5
 10 |  * Copyright (c) 2011 Paul Fryer (www.fryer.org.uk)
 11 |  * This program is free software; you can redistribute it and/or modify
 12 |  * it under the terms of the The GNU Lesser General Public License as published by
 13 |  * the Free Software Foundation; version 3 or any latter version of the license.
 14 |  * 
 15 |  * This program is distributed in the hope that it will be useful,
 16 |  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17 |  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 18 |  * The GNU Lesser General Public License (LGPLv3) for more details.
 19 |  * 
 20 |  * 
 21 |  * @package PHPSandbox
 22 |  * @author Paul Fryer <paul@fryer.org.uk>
 23 |  * @license http://www.opensource.org/licenses/lgpl-3.0.html LGPL
 24 |  *
 25 |  */
 26 | 
 27 | require_once 'phpsandbox.php';
 28 | 
 29 | ini_set('display_warnings', 'on');
 30 | 
 31 | //Default sandbox
 32 | $sandbox = new PHPSandbox();
 33 | 
 34 | //Modified sandbox to allow testing of session data
 35 | $sandbox2 = new PHPSandbox(array('pass_session_data' => true));
 36 | 
 37 | //Modified sandbox to allow full access of session data
 38 | $sandbox3 = new PHPSandbox(array('pass_session_data' => true,
 39 | 								'pass_session_id' => true,
 40 | 								'display_errors' => 'on',
 41 | 								'pass_post' => true,
 42 | 								'pass_get' => true,
 43 | ));
 44 | 
 45 | //We really do trust this script
 46 | $sandbox3->enableAllFunction(true);
 47 | 
 48 | $dir = realpath(dirname(__FILE__)).DIRECTORY_SEPARATOR;
 49 | 
 50 | //For example purposes
 51 | session_start();
 52 | if(!isset($_SESSION['TestValue'])){
 53 | 	$_SESSION['TestValue'] = 'Yay :-) '.time();
 54 | }
 55 | 
 56 | ?>
 57 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
 58 | <html>
 59 | 	<head>
 60 | 		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 61 | 		<title>PHPSandbox Examples</title>
 62 | 	</head>
 63 | 	<body>
 64 | 		<h1>PHPSandbox</h1><h2>Run some PHP files with in an external PHP file in a 'safer' mannor</h2>
 65 | 		
 66 | 		<div>
 67 | 			<div><h3>Output Session Data</h3><p>Show the start Session data</p></div>
 68 | 			<div style="border:1px; padding:5px;"><?php echo 'Genuine Session ID: '.session_id().'<br/>'; foreach ($_SESSION as $key => $value){ echo '<p>'.$key.' = '.$value.'</p>'; }; ?></div>
 69 | 		</div>
 70 | 		
 71 | 		<div>
 72 | 			<div><h3>Example 1 - Valid Code</h3><p>Just run some considered safe code</p></div>
 73 | 			<div style="border:1px; padding:15px; margin:15px; background:cornsilk;"><?php echo($sandbox->runFile($dir.'samples/valid.php')); ?></div>
 74 | 			<div><strong>Run Time:</strong> <?php echo($sandbox->runTime()); ?></div>
 75 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox->errors()); ?></div>
 76 | 		</div>
 77 | 
 78 | 		<div>
 79 | 			<div><h3>Example 2 - Invalid PHP</h3><p>Try to include a file that is badly formated</p></div>
 80 | 			<div style="border:1px; padding:15px; margin:15px; background:cornsilk;"><?php echo($sandbox->runFile($dir.'samples/invalid.php')); ?></div>
 81 | 			<div><strong>Run Time:</strong> <?php echo($sandbox->runTime()); ?></div>
 82 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox->errors()); ?></div>
 83 | 		</div>
 84 | 		
 85 | 		<div>
 86 | 			<div><h3>Example 3 - Malicious PHP</h3><p>Try to run some code that would do something considered dodgy</p></div>
 87 | 			<div style="border:1px; padding:15px; margin:15px; background:cornsilk;"><?php echo($sandbox->runFile($dir.'samples/malicious.php')); ?></div>
 88 | 			<div><strong>Run Time:</strong> <?php echo($sandbox->runTime()); ?></div>
 89 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox->errors()); ?></div>
 90 | 		</div>
 91 | 
 92 | 		<div>
 93 | 			<div><h3>Example 4 - Recon PHP</h3><p>Run some PHP specifically for gathering information about the system (With a copy of the session information and a faked ID)</p></div>
 94 | 			<div style="border:1px; padding:15px; margin:15px; background:cornsilk;"><?php echo($sandbox2->runFile($dir.'samples/recon.php')); ?></div>
 95 | 			<div><strong>Run Time:</strong> <?php echo($sandbox2->runTime()); ?></div>
 96 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox2->errors()); ?></div>
 97 | 		</div>
 98 | 
 99 | 		<div>
100 | 			<div><h3>Example 5 - Trusted PHP</h3><p>Run some trusted PHP with Session Access and Update rights (Direct Session access)</p></div>
101 | 			<div style="border:1px; padding:15px; margin:15px; background:cornsilk;"><?php echo($sandbox3->runFile($dir.'samples/trusted.php')); ?></div>
102 | 			<div><strong>Run Time:</strong> <?php echo($sandbox3->runTime()); ?></div>
103 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox3->errors()); ?></div>
104 | 		</div>
105 | 
106 | 		<div>
107 | 			<div><h3>Example 6 - Slow PHP</h3><p>Include a PHP file that would run for longer than the allowed limit</p></div>
108 | 			<div style="border:1px; padding:5px; background:cornsilk;"><?php echo($sandbox3->runFile($dir.'samples/slow.php')); ?></div>
109 | 			<div><strong>Run Time:</strong> <?php echo($sandbox3->runTime()); ?></div>
110 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox3->errors()); ?></div>
111 | 		</div>
112 | 		
113 | 		<div>
114 | 			<div><h3>Example 7 - Running PHP from a string input</h3><p>Run the trusted PHP code but with protection and as if it's been passed in to the command</p></div>
115 | 			<div style="border:1px; padding:5px; background:cornsilk;"><?php echo($sandbox3->runCode(file_get_contents($dir.'samples/trusted.php'))); ?></div>
116 | 			<div><strong>Run Time:</strong> <?php echo($sandbox3->runTime()); ?></div>
117 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox3->errors()); ?></div>
118 | 		</div>
119 | 
120 | 		<div>
121 | 			<div><h3>Example 8 - Running PHP directly from a string input</h3><p>Run the trusted PHP code but with protection and as if it's been streamed in to the command</p></div>
122 | 			<div style="border:1px; padding:5px; background:cornsilk;"><?php echo($sandbox3->runCodeDirect(file_get_contents($dir.'samples/trusted.php'))); ?></div>
123 | 			<div><strong>Run Time:</strong> <?php echo($sandbox3->runTime()); ?></div>
124 | 			<div><strong>Error Log:</strong> <?php var_dump($sandbox3->errors()); ?></div>
125 | 		</div>
126 | 
127 | 		<div>
128 | 			<div><h3>Output Session Data</h3><p>Show the now Session data</p></div>
129 | 			<div style="border:1px; padding:5px;"><?php foreach ($_SESSION as $key => $value){ echo '<p>'.$key.' = '.$value.'</p>'; }; ?></div>
130 | 		</div>
131 | 
132 | 	</body>
133 | </html>


--------------------------------------------------------------------------------
/COPYING.LESSER:
--------------------------------------------------------------------------------
  1 |                    GNU LESSER GENERAL PUBLIC LICENSE
  2 |                        Version 3, 29 June 2007
  3 | 
  4 |  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  5 |  Everyone is permitted to copy and distribute verbatim copies
  6 |  of this license document, but changing it is not allowed.
  7 | 
  8 | 
  9 |   This version of the GNU Lesser General Public License incorporates
 10 | the terms and conditions of version 3 of the GNU General Public
 11 | License, supplemented by the additional permissions listed below.
 12 | 
 13 |   0. Additional Definitions.
 14 | 
 15 |   As used herein, "this License" refers to version 3 of the GNU Lesser
 16 | General Public License, and the "GNU GPL" refers to version 3 of the GNU
 17 | General Public License.
 18 | 
 19 |   "The Library" refers to a covered work governed by this License,
 20 | other than an Application or a Combined Work as defined below.
 21 | 
 22 |   An "Application" is any work that makes use of an interface provided
 23 | by the Library, but which is not otherwise based on the Library.
 24 | Defining a subclass of a class defined by the Library is deemed a mode
 25 | of using an interface provided by the Library.
 26 | 
 27 |   A "Combined Work" is a work produced by combining or linking an
 28 | Application with the Library.  The particular version of the Library
 29 | with which the Combined Work was made is also called the "Linked
 30 | Version".
 31 | 
 32 |   The "Minimal Corresponding Source" for a Combined Work means the
 33 | Corresponding Source for the Combined Work, excluding any source code
 34 | for portions of the Combined Work that, considered in isolation, are
 35 | based on the Application, and not on the Linked Version.
 36 | 
 37 |   The "Corresponding Application Code" for a Combined Work means the
 38 | object code and/or source code for the Application, including any data
 39 | and utility programs needed for reproducing the Combined Work from the
 40 | Application, but excluding the System Libraries of the Combined Work.
 41 | 
 42 |   1. Exception to Section 3 of the GNU GPL.
 43 | 
 44 |   You may convey a covered work under sections 3 and 4 of this License
 45 | without being bound by section 3 of the GNU GPL.
 46 | 
 47 |   2. Conveying Modified Versions.
 48 | 
 49 |   If you modify a copy of the Library, and, in your modifications, a
 50 | facility refers to a function or data to be supplied by an Application
 51 | that uses the facility (other than as an argument passed when the
 52 | facility is invoked), then you may convey a copy of the modified
 53 | version:
 54 | 
 55 |    a) under this License, provided that you make a good faith effort to
 56 |    ensure that, in the event an Application does not supply the
 57 |    function or data, the facility still operates, and performs
 58 |    whatever part of its purpose remains meaningful, or
 59 | 
 60 |    b) under the GNU GPL, with none of the additional permissions of
 61 |    this License applicable to that copy.
 62 | 
 63 |   3. Object Code Incorporating Material from Library Header Files.
 64 | 
 65 |   The object code form of an Application may incorporate material from
 66 | a header file that is part of the Library.  You may convey such object
 67 | code under terms of your choice, provided that, if the incorporated
 68 | material is not limited to numerical parameters, data structure
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 72 |    a) Give prominent notice with each copy of the object code that the
 73 |    Library is used in it and that the Library and its use are
 74 |    covered by this License.
 75 | 
 76 |    b) Accompany the object code with a copy of the GNU GPL and this license
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 78 | 
 79 |   4. Combined Works.
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 94 |    c) For a Combined Work that displays copyright notices during
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 97 |    copies of the GNU GPL and this license document.
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 99 |    d) Do one of the following:
100 | 
101 |        0) Convey the Minimal Corresponding Source under the terms of this
102 |        License, and the Corresponding Application Code in a form
103 |        suitable for, and under terms that permit, the user to
104 |        recombine or relink the Application with a modified version of
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106 |        manner specified by section 6 of the GNU GPL for conveying
107 |        Corresponding Source.
108 | 
109 |        1) Use a suitable shared library mechanism for linking with the
110 |        Library.  A suitable mechanism is one that (a) uses at run time
111 |        a copy of the Library already present on the user's computer
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114 |        Version.
115 | 
116 |    e) Provide Installation Information, but only if you would otherwise
117 |    be required to provide such information under section 6 of the
118 |    GNU GPL, and only to the extent that such information is
119 |    necessary to install and execute a modified version of the
120 |    Combined Work produced by recombining or relinking the
121 |    Application with a modified version of the Linked Version. (If
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126 |    for conveying Corresponding Source.)
127 | 
128 |   5. Combined Libraries.
129 | 
130 |   You may place library facilities that are a work based on the
131 | Library side by side in a single library together with other library
132 | facilities that are not Applications and are not covered by this
133 | License, and convey such a combined library under terms of your
134 | choice, if you do both of the following:
135 | 
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137 |    on the Library, uncombined with any other library facilities,
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141 |    is a work based on the Library, and explaining where to find the
142 |    accompanying uncombined form of the same work.
143 | 
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145 | 
146 |   The Free Software Foundation may publish revised and/or new versions
147 | of the GNU Lesser General Public License from time to time. Such new
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149 | differ in detail to address new problems or concerns.
150 | 
151 |   Each version is given a distinguishing version number. If the
152 | Library as you received it specifies that a certain numbered version
153 | of the GNU Lesser General Public License "or any later version"
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155 | conditions either of that published version or of any later version
156 | published by the Free Software Foundation. If the Library as you
157 | received it does not specify a version number of the GNU Lesser
158 | General Public License, you may choose any version of the GNU Lesser
159 | General Public License ever published by the Free Software Foundation.
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164 | permanent authorization for you to choose that version for the
165 | Library.
166 | 


--------------------------------------------------------------------------------
/phpsandbox.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /**
  3 |  * PHP Sandbox
  4 |  * 
  5 |  * A PHP sandboxing class to help increase security of unknown scripts
  6 |  * This is not the be all and end all of security!
  7 |  * 
  8 |  * Requirements: PHP5
  9 |  * Copyright (c) 2011 Paul Fryer (www.fryer.org.uk)
 10 |  * This program is free software; you can redistribute it and/or modify
 11 |  * it under the terms of the The GNU Lesser General Public License as published by
 12 |  * the Free Software Foundation; version 3 or any latter version of the license.
 13 |  * 
 14 |  * This program is distributed in the hope that it will be useful,
 15 |  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 |  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 17 |  * The GNU Lesser General Public License (LGPLv3) for more details.
 18 |  * 
 19 |  * 
 20 |  * @package PHPSandbox
 21 |  * @author Paul Fryer <paul@fryer.org.uk>
 22 |  * @license http://www.opensource.org/licenses/lgpl-3.0.html LGPL
 23 |  *
 24 |  */
 25 | 
 26 | class PHPSandbox {
 27 | 	
 28 | 	private $lint_code = true;
 29 | 	private $session_workaround = false;
 30 | 	private $session_id = false;
 31 | 	
 32 | 	private $error_array = array();
 33 | 	private $options = 	array(	'chroot' => '/', 
 34 | 								'display_errors' => 'off',
 35 | 								'pass_post' => false, 
 36 | 								'pass_get' => false, 
 37 | 								'pass_session_data' => false,
 38 | 								'pass_session_id' => false,
 39 | 								'auto_prepend_file' => false,
 40 | 								'auto_append_file' => false, 
 41 | 								'force_session_workaround' => true,
 42 | 								'max_execution_time' => 1, 
 43 | 								'memory_limit' => '2M', 
 44 | 								'disable_functions' => 'exec,passthru,shell_exec,system,proc_open,popen,curl_exec,curl_multi_exec,parse_ini_file,show_source,pcntl_fork,pcntl_exec,session_start,phpinfo,ini_set',
 45 | 								'safe_mode' => true,
 46 | 								'directory_protection' => true,
 47 | 								'directory_protection_allow_tmp' => true,
 48 | 								'use_apc' => false,
 49 | 								'log_to_file' => false,
 50 | 								'log_to_array' => true,
 51 | 								);
 52 | 	
 53 | 	private $cli_options = '';
 54 | 	private $cli_command = 'php';
 55 | 	
 56 | 	private $run_start_time = 0;
 57 | 	private $run_end_time = 0;
 58 | 	
 59 | 	private $pre_fix_php = 'date_default_timezone_set("UTC");$i = 1;unset($argv[0]);while ($i < 3 && isset($argv[$i])){if(substr($argv[$i], 0, 5) == "_POST"){$_POST = unserialize(substr($argv[$i], 6));unset($argv[$i]);}else if(substr($argv[$i], 0, 4) == "_GET"){$_GET = unserialize(substr($argv[$i], 5));unset($argv[$i]);break;}$i++;}foreach($_ENV as $key => $value){putenv("$key=null");$_ENV[$key]=null;unset($_ENV[$key]);};echo"PREFIXED!";';
 60 | 	
 61 | 	/**
 62 | 	 * 
 63 | 	 * PHP Sandbox default construct
 64 | 	 * 
 65 | 	 * Current options are: display_errors => on|off, disable_functions => (csv of functions), pass_post => true|flase, pass_get => true|flase, pass_session => true|flase, max_execution_time => seconds, memory_limit => 2M
 66 | 	 * 
 67 | 	 * @param array $options
 68 | 	 */
 69 | 	public function __construct($options = array()){
 70 | 		$this->options['chroot'] = sys_get_temp_dir();
 71 | 		$this->options['auto_prepend_file'] = realpath(dirname(__FILE__)).DIRECTORY_SEPARATOR.'phpsandbox-prepend.php';
 72 | 		$this->options['auto_append_file'] = realpath(dirname(__FILE__)).DIRECTORY_SEPARATOR.'phpsandbox-append.php';
 73 | 		$this->options = array_merge($this->options, $options);
 74 | 		
 75 | 		if(isset($this->options['pass_session_id']) && $this->options['pass_session_id'] && isset($this->options['pass_session_data']) && $this->options['pass_session_data']){
 76 | 			$this->enableFunction('session_start', false);
 77 | 		}
 78 | 		
 79 | 		$this->tempPath = sys_get_temp_dir().DIRECTORY_SEPARATOR;
 80 | 		
 81 | 		if(PHP_VERSION >= 5.4){
 82 | 			$this->options['safe_mode'] = false;
 83 | 		}
 84 | 		
 85 | 		$this->sessionWorkaround();
 86 | 		
 87 | 		$this->buildCLIOptions();
 88 | 	}
 89 | 		
 90 | 	/**
 91 | 	 * setCLI
 92 | 	 * if the php's path is not set in %path% , or in case of multiple phps running in system
 93 | 	 * @param string $path
 94 | 	 */
 95 |     	public function setCLI($path='php') {
 96 |         	$this->cli_command = $path;
 97 |     	}
 98 |     	
 99 | 	private function sessionWorkaround(){
100 | 		$session_workaround = array('Darwin' => true);
101 | 		if(isset($session_workaround[PHP_OS]) && $session_workaround[PHP_OS] || $this->options['force_session_workaround']){
102 | 			$this->session_workaround = true;
103 | 		}
104 | 	}
105 | 	
106 | 	/**
107 | 	 * 
108 | 	 * Build the CLI options string
109 | 	 */
110 | 	private function buildCLIOptions(){
111 | 		$this->cli_options = '-d session.name=PHPSESSID -d chroot='.$this->options['chroot'].' -d display_errors='.$this->options['display_errors']. ' -d memory_limit='.$this->options['memory_limit'].' -d max_execution_time='.$this->options['max_execution_time'];
112 | 		if(isset($this->options['disable_functions']) && $this->options['disable_functions'] != ''){
113 | 			$this->cli_options .=' -d disable_functions='.$this->options['disable_functions'];
114 | 		}
115 | 		
116 | 		if(ini_get('session.save_path') && ini_get('session.save_path') != ''){
117 | 			$this->cli_options .= ' -d session.save_path='.ini_get('session.save_path');
118 | 		}else{
119 | 			$this->cli_options .= ' -d session.save_path='.$this->tempPath;
120 | 		}
121 | 		
122 | 		if(isset($this->options['auto_prepend_file']) && file_exists($this->options['auto_prepend_file'])){
123 | 			$this->cli_options .= ' -d auto_prepend_file="'.addslashes($this->options['auto_prepend_file']).'"';
124 | 		}
125 | 		
126 | 		if(isset($this->options['auto_append_file']) && file_exists($this->options['auto_append_file'])){
127 | 			$this->cli_options .= ' -d auto_append_file="'.addslashes($this->options['auto_append_file']).'"';
128 | 		}
129 | 	}
130 | 	
131 | 	/**
132 | 	 * 
133 | 	 * Enable a function from the disallowed function list
134 | 	 * @param string $function
135 | 	 * @param bool $force_rebuild
136 | 	 */
137 | 	public function enableFunction($function, $force_rebuild = true){
138 | 		$functions = explode(',', $this->options['disable_functions']);
139 | 		$functions = array_flip($functions);
140 | 		if(isset($function) && isset($functions[$function])){
141 | 			unset($functions[$function]);
142 | 		}
143 | 		$functions = array_flip($functions);
144 | 		$this->options['disable_functions'] = implode(',', $functions);
145 | 		if($force_rebuild){
146 | 			$this->buildCLIOptions();
147 | 		}
148 | 	}
149 | 	
150 | 	/**
151 | 	 * 
152 | 	 * Remove all function and method restrictions
153 | 	 * @param bool $YesIReallyWantTo
154 | 	 */
155 | 	public function enableAllFunction($YesIReallyWantTo = false){
156 | 		if($YesIReallyWantTo){
157 | 			$this->options['disable_functions'] = '';
158 | 			$this->options['safe_mode'] = false;
159 | 			$this->buildCLIOptions();
160 | 		}
161 | 	}
162 | 
163 | 	private function closeSession(){
164 | 		if(isset($this->options['pass_session_id']) && $this->options['pass_session_id']){
165 | 			$this->session_id = session_id();
166 | 			session_write_close();
167 | 			$restart_session = true;
168 | 		}
169 | 	}
170 | 	
171 | 	/**
172 | 	 * 
173 | 	 * Run the specified file in a PHP sandbox
174 | 	 * @param string $path
175 | 	 * @param array $pass_through_vars
176 | 	 * @param bool $lintCode
177 | 	 */
178 | 	public function runFile($path, $pass_through_vars = array(), $lintCode = true){
179 | 		$path = realpath($path);
180 | 		$this->clearErrorLog();
181 | 		$restart_session = false;
182 | 		$session_id = null;
183 | 		$response = false;
184 | 
185 | 		if(file_exists($path)){
186 | 			if(($lintCode && $this->lintFile($path)) || !$lintCode){
187 | 				$this->closeSession();
188 | 
189 | 				$chroot = dirname($path);
190 | 
191 | 				//For debuging
192 | 				//$this->debug("$this->cli_command $this->cli_options -d auto_prepend_file=\"".addslashes($this->options['auto_prepend_file']).'"'.$this->enhancedProtection($chroot)." -d chroot=$chroot -f $path ".$this->buildVars($pass_through_vars));
193 | 				$this->run_start_time = $this->timeStamp();
194 | 				$response = shell_exec("$this->cli_command $this->cli_options ".$this->enhancedProtection($chroot)." -d chroot=\"$chroot\" -f $path ".$this->buildVars($pass_through_vars));		
195 | 				$this->run_end_time = $this->timeStamp();
196 | 			}
197 | 		}
198 | 		
199 | 		if($restart_session){
200 | 			//Ignore the warning about headers, we know already!
201 | 			session_id($this->session_id);
202 | 			@session_start();
203 | 			$file = $this->tempPath.'sess_'.$this->session_id;
204 | 			if($this->session_workaround && file_exists($file)){
205 | 				session_decode(file_get_contents($file));
206 | 				/*
207 | 				if($this->tempPath.'sess_'.$this->session_id != ini_get('session.save_path')){
208 | 					unlink($this->tempPath.'sess_'.$this->session_id);
209 | 				}
210 | 				*/
211 | 			}
212 | 		}
213 | 		
214 | 		return $response;
215 | 	}
216 | 	
217 | 	/**
218 | 	 * For running PHP code directly in a Sandboxed environment
219 | 	* This input will be stored as a file for future re-running, supports lint 
220 | 	 * @param string $code
221 | 	 * @param array $pass_through_vars
222 | 	 * @param bool $lintCode
223 | 	 */
224 | 	public function runCode($code, $pass_through_vars = array(), $lintCode = true){
225 | 		$path = tempnam($this->tempPath, 'tmp');
226 | 		file_put_contents($path, $code);
227 | 		
228 | 		$response = $this->runFile($path, $pass_through_vars, $lintCode);
229 | 		unlink($path);
230 | 		return $response;
231 | 	}
232 | 	
233 | 	/**
234 | 	 * NOT YET IMPLEMENTED
235 | 	 * For running PHP code directly in a Sandboxed environment
236 | 	 * This function is highly likely to fail, really only use it for testing if you absolutely must do.
237 | 	 * @param string $code
238 | 	 * @param array $pass_through_vars
239 | 	 */
240 | 	public function runCodeDirect($code, $pass_through_vars = array()){
241 | 		$this->clearErrorLog();
242 | 		$restart_session = false;
243 | 		$session_id = null;
244 | 		$response = false;
245 | 
246 | 		$this->run_start_time = $this->timeStamp();
247 | 		$this->closeSession();
248 | 		$response = shell_exec("$this->cli_command $this->cli_options ".$this->enhancedProtection($chroot)." -d chroot=\"$chroot\" -r '$code' ".$this->buildVars($pass_through_vars));			$this->run_end_time = $this->timeStamp();
249 | 
250 | 		return $response;
251 | 	}
252 | 
253 | 	/**
254 | 	 * 
255 | 	 * Build up the standard arguments to pass to the CLI
256 | 	 * Allows for custom arguments to be added to the end
257 | 	 * @param array $pass_through_vars
258 | 	 */
259 | 	private function buildVars($pass_through_vars = array()){
260 | 		$string = '';
261 | 		
262 | 		if($this->options['pass_post']){
263 | 			$string .= ' _POST=\''.serialize($_POST)."'";
264 | 		}
265 | 		
266 | 		if($this->options['pass_get']){
267 | 			$string .= ' _GET=\''.serialize($_GET)."'";
268 | 		}
269 | 		
270 | 		if($this->session_workaround){
271 | 			$string .= ' _SESSWORKAROUND=\'true\'';
272 | 		}
273 | 		
274 | 		if($this->options['pass_session_data'] && $this->session_id && $this->session_id != ''){
275 | 			if(isset($this->options['pass_session_id']) && $this->options['pass_session_id'] ){
276 | 				$string .= ' _PHPSESSID=\''.$this->session_id."'";
277 | 			}else {
278 | 				$string .= ' _PHPSESSID=\''.sha1(rand(0,getrandmax()).serialize($_SERVER).time())."'";
279 | 			}
280 | 		}
281 | 		
282 | 		if($this->options['pass_session_data']){
283 | 			$string .= ' _SESSION=\''.serialize($_SESSION)."'";
284 | 		}
285 | 		
286 | 		if($this->options['use_apc']){
287 | 			$string .= ' _APC=\'true\'';
288 | 		}
289 | 		
290 | 		$string .= ' _END';
291 | 			
292 | 		if(isset($pass_through_vars) and count($pass_through_vars) > 0){
293 | 			foreach ($pass_through_vars as $value){
294 | 				$string .= ' '.$value;
295 | 			}
296 | 		}
297 | 		
298 | 		return $string;
299 | 	}
300 | 	
301 | 	private function lintCode($code){
302 | 		return true;
303 | 		if(shell_exec("$this->cli_command -l -r $code")){
304 | 			return true;
305 | 		}
306 | 		$this->debug('Code failed lint: ' . $code);
307 | 		return false;
308 | 	}
309 | 	
310 | 	/**
311 | 	 * 
312 | 	 * lintFile Calls the PHP binary with the lint only function to validate the file format
313 | 	 * @param string $path
314 | 	 */
315 | 	private function lintFile($path){
316 | 		$output;
317 | 		$return_var;
318 | 		exec("$this->cli_command -l -f $path", $output, $return_var);
319 | 		if($return_var == 0){
320 | 			return true;
321 | 		}
322 | 		$this->debug('File failed lint: '. $path);
323 | 		return false;
324 | 	}
325 | 	
326 | 	/**
327 | 	 * Create a unique directory for CHRoot'ing to
328 | 	 */
329 | 	private function createTempCHRoot($salt = ''){
330 | 		if(is_writable(sys_get_temp_dir())){
331 | 			$dir = sys_get_temp_dir() . DIRECTORY_SEPARATOR . md5(uniqid(true).$salt);
332 | 			if(is_dir($dir) || !mkdir($dir, 0700)){
333 | 				$dir = $this->createTempCHRoot($dir);
334 | 			}
335 | 			return $dir;
336 | 		}
337 | 		return false;
338 | 	}
339 | 	
340 | 	/**
341 | 	 * enhancedProtection
342 | 	 * Sets the additional options to help prevent directory traversal and PHP safe mode
343 | 	 * @param string the directory of the scripts
344 | 	 */
345 | 	private function enhancedProtection($scriptDir){
346 | 		$dir_seperator = ':';
347 | 		if(PHP_OS == 'WINNT'){
348 | 			$dir_seperator = ';';
349 | 		}
350 | 		
351 | 		$str = '';
352 | 		if(substr($scriptDir, -1) != DIRECTORY_SEPARATOR){
353 | 			$scriptDir .= DIRECTORY_SEPARATOR;
354 | 		}
355 | 		
356 | 		if($this->options['safe_mode']){
357 | 			$str .= ' -d safe_mode=1  -d safe_mode_exec_dir="'.addslashes($scriptDir).'"';
358 | 		}
359 | 		
360 | 		if($this->options['directory_protection']){
361 | 			$str .= ' -d open_basedir="'.addslashes($scriptDir).$dir_seperator.addslashes(dirname($this->options['auto_prepend_file'])).$dir_seperator.addslashes(dirname($this->options['auto_append_file'])).$dir_seperator.addslashes('/dev/shm/').DIRECTORY_SEPARATOR;
362 | 			
363 | 			if($this->options['directory_protection_allow_tmp']){
364 | 				$str .= $dir_seperator . $this->tempPath;
365 | 			}
366 | 			
367 | 			if($this->options['pass_session_id']){
368 | 				$str .= $dir_seperator . session_save_path();
369 | 			}
370 | 			
371 | 			$str .=  $dir_seperator.'" ';
372 | 		}
373 | 		
374 | 		return $str;
375 | 	}
376 | 	
377 | 	private function clearErrorLog(){
378 | 		$this->error_log = array();
379 | 	}
380 | 	
381 | 	private function debug($input){
382 | 		if($this->options['log_to_array']){
383 | 			$this->error_log[] = $input;
384 | 		}
385 | 		
386 | 		if($this->options['log_to_file']){
387 | 			error_log($input);
388 | 		}
389 | 	}
390 | 	
391 | 	public function errors(){
392 | 		return $this->error_log;
393 | 	}
394 | 	
395 | 	public function runTime(){
396 | 		return round($this->run_end_time - $this->run_start_time,4);
397 | 	}
398 | 	
399 | 	private function timeStamp(){
400 | 		list($usec, $sec) = explode(" ", microtime());
401 | 		return ((float)$usec + (float)$sec);
402 | 	}
403 | }
404 | 


--------------------------------------------------------------------------------
/COPYING:
--------------------------------------------------------------------------------
  1 |                     GNU GENERAL PUBLIC LICENSE
  2 |                        Version 3, 29 June 2007
  3 | 
  4 |  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  5 |  Everyone is permitted to copy and distribute verbatim copies
  6 |  of this license document, but changing it is not allowed.
  7 | 
  8 |                             Preamble
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124 | than the work as a whole, that (a) is included in the normal form of
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146 | 
147 |   The Corresponding Source need not include anything that users
148 | can regenerate automatically from other parts of the Corresponding
149 | Source.
150 | 
151 |   The Corresponding Source for a work in source code form is that
152 | same work.
153 | 
154 |   2. Basic Permissions.
155 | 
156 |   All rights granted under this License are granted for the term of
157 | copyright on the Program, and are irrevocable provided the stated
158 | conditions are met.  This License explicitly affirms your unlimited
159 | permission to run the unmodified Program.  The output from running a
160 | covered work is covered by this License only if the output, given its
161 | content, constitutes a covered work.  This License acknowledges your
162 | rights of fair use or other equivalent, as provided by copyright law.
163 | 
164 |   You may make, run and propagate covered works that you do not
165 | convey, without conditions so long as your license otherwise remains
166 | in force.  You may convey covered works to others for the sole purpose
167 | of having them make modifications exclusively for you, or provide you
168 | with facilities for running those works, provided that you comply with
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171 | for you must do so exclusively on your behalf, under your direction
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173 | your copyrighted material outside their relationship with you.
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176 | the conditions stated below.  Sublicensing is not allowed; section 10
177 | makes it unnecessary.
178 | 
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180 | 
181 |   No covered work shall be deemed part of an effective technological
182 | measure under any applicable law fulfilling obligations under article
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185 | measures.
186 | 
187 |   When you convey a covered work, you waive any legal power to forbid
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195 |   4. Conveying Verbatim Copies.
196 | 
197 |   You may convey verbatim copies of the Program's source code as you
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203 | recipients a copy of this License along with the Program.
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230 |     d) If the work has interactive user interfaces, each must display
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245 |   6. Conveying Non-Source Forms.
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247 |   You may convey a covered work in object code form under the terms
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254 |     Corresponding Source fixed on a durable physical medium
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287 | 
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341 | unpacking, reading or copying.
342 | 
343 |   7. Additional Terms.
344 | 
345 |   "Additional permissions" are terms that supplement the terms of this
346 | License by making exceptions from one or more of its conditions.
347 | Additional permissions that are applicable to the entire Program shall
348 | be treated as though they were included in this License, to the extent
349 | that they are valid under applicable law.  If additional permissions
350 | apply only to part of the Program, that part may be used separately
351 | under those permissions, but the entire Program remains governed by
352 | this License without regard to the additional permissions.
353 | 
354 |   When you convey a copy of a covered work, you may at your option
355 | remove any additional permissions from that copy, or from any part of
356 | it.  (Additional permissions may be written to require their own
357 | removal in certain cases when you modify the work.)  You may place
358 | additional permissions on material, added by you to a covered work,
359 | for which you have or can give appropriate copyright permission.
360 | 
361 |   Notwithstanding any other provision of this License, for material you
362 | add to a covered work, you may (if authorized by the copyright holders of
363 | that material) supplement the terms of this License with terms:
364 | 
365 |     a) Disclaiming warranty or limiting liability differently from the
366 |     terms of sections 15 and 16 of this License; or
367 | 
368 |     b) Requiring preservation of specified reasonable legal notices or
369 |     author attributions in that material or in the Appropriate Legal
370 |     Notices displayed by works containing it; or
371 | 
372 |     c) Prohibiting misrepresentation of the origin of that material, or
373 |     requiring that modified versions of such material be marked in
374 |     reasonable ways as different from the original version; or
375 | 
376 |     d) Limiting the use for publicity purposes of names of licensors or
377 |     authors of the material; or
378 | 
379 |     e) Declining to grant rights under trademark law for use of some
380 |     trade names, trademarks, or service marks; or
381 | 
382 |     f) Requiring indemnification of licensors and authors of that
383 |     material by anyone who conveys the material (or modified versions of
384 |     it) with contractual assumptions of liability to the recipient, for
385 |     any liability that these contractual assumptions directly impose on
386 |     those licensors and authors.
387 | 
388 |   All other non-permissive additional terms are considered "further
389 | restrictions" within the meaning of section 10.  If the Program as you
390 | received it, or any part of it, contains a notice stating that it is
391 | governed by this License along with a term that is a further
392 | restriction, you may remove that term.  If a license document contains
393 | a further restriction but permits relicensing or conveying under this
394 | License, you may add to a covered work material governed by the terms
395 | of that license document, provided that the further restriction does
396 | not survive such relicensing or conveying.
397 | 
398 |   If you add terms to a covered work in accord with this section, you
399 | must place, in the relevant source files, a statement of the
400 | additional terms that apply to those files, or a notice indicating
401 | where to find the applicable terms.
402 | 
403 |   Additional terms, permissive or non-permissive, may be stated in the
404 | form of a separately written license, or stated as exceptions;
405 | the above requirements apply either way.
406 | 
407 |   8. Termination.
408 | 
409 |   You may not propagate or modify a covered work except as expressly
410 | provided under this License.  Any attempt otherwise to propagate or
411 | modify it is void, and will automatically terminate your rights under
412 | this License (including any patent licenses granted under the third
413 | paragraph of section 11).
414 | 
415 |   However, if you cease all violation of this License, then your
416 | license from a particular copyright holder is reinstated (a)
417 | provisionally, unless and until the copyright holder explicitly and
418 | finally terminates your license, and (b) permanently, if the copyright
419 | holder fails to notify you of the violation by some reasonable means
420 | prior to 60 days after the cessation.
421 | 
422 |   Moreover, your license from a particular copyright holder is
423 | reinstated permanently if the copyright holder notifies you of the
424 | violation by some reasonable means, this is the first time you have
425 | received notice of violation of this License (for any work) from that
426 | copyright holder, and you cure the violation prior to 30 days after
427 | your receipt of the notice.
428 | 
429 |   Termination of your rights under this section does not terminate the
430 | licenses of parties who have received copies or rights from you under
431 | this License.  If your rights have been terminated and not permanently
432 | reinstated, you do not qualify to receive new licenses for the same
433 | material under section 10.
434 | 
435 |   9. Acceptance Not Required for Having Copies.
436 | 
437 |   You are not required to accept this License in order to receive or
438 | run a copy of the Program.  Ancillary propagation of a covered work
439 | occurring solely as a consequence of using peer-to-peer transmission
440 | to receive a copy likewise does not require acceptance.  However,
441 | nothing other than this License grants you permission to propagate or
442 | modify any covered work.  These actions infringe copyright if you do
443 | not accept this License.  Therefore, by modifying or propagating a
444 | covered work, you indicate your acceptance of this License to do so.
445 | 
446 |   10. Automatic Licensing of Downstream Recipients.
447 | 
448 |   Each time you convey a covered work, the recipient automatically
449 | receives a license from the original licensors, to run, modify and
450 | propagate that work, subject to this License.  You are not responsible
451 | for enforcing compliance by third parties with this License.
452 | 
453 |   An "entity transaction" is a transaction transferring control of an
454 | organization, or substantially all assets of one, or subdividing an
455 | organization, or merging organizations.  If propagation of a covered
456 | work results from an entity transaction, each party to that
457 | transaction who receives a copy of the work also receives whatever
458 | licenses to the work the party's predecessor in interest had or could
459 | give under the previous paragraph, plus a right to possession of the
460 | Corresponding Source of the work from the predecessor in interest, if
461 | the predecessor has it or can get it with reasonable efforts.
462 | 
463 |   You may not impose any further restrictions on the exercise of the
464 | rights granted or affirmed under this License.  For example, you may
465 | not impose a license fee, royalty, or other charge for exercise of
466 | rights granted under this License, and you may not initiate litigation
467 | (including a cross-claim or counterclaim in a lawsuit) alleging that
468 | any patent claim is infringed by making, using, selling, offering for
469 | sale, or importing the Program or any portion of it.
470 | 
471 |   11. Patents.
472 | 
473 |   A "contributor" is a copyright holder who authorizes use under this
474 | License of the Program or a work on which the Program is based.  The
475 | work thus licensed is called the contributor's "contributor version".
476 | 
477 |   A contributor's "essential patent claims" are all patent claims
478 | owned or controlled by the contributor, whether already acquired or
479 | hereafter acquired, that would be infringed by some manner, permitted
480 | by this License, of making, using, or selling its contributor version,
481 | but do not include claims that would be infringed only as a
482 | consequence of further modification of the contributor version.  For
483 | purposes of this definition, "control" includes the right to grant
484 | patent sublicenses in a manner consistent with the requirements of
485 | this License.
486 | 
487 |   Each contributor grants you a non-exclusive, worldwide, royalty-free
488 | patent license under the contributor's essential patent claims, to
489 | make, use, sell, offer for sale, import and otherwise run, modify and
490 | propagate the contents of its contributor version.
491 | 
492 |   In the following three paragraphs, a "patent license" is any express
493 | agreement or commitment, however denominated, not to enforce a patent
494 | (such as an express permission to practice a patent or covenant not to
495 | sue for patent infringement).  To "grant" such a patent license to a
496 | party means to make such an agreement or commitment not to enforce a
497 | patent against the party.
498 | 
499 |   If you convey a covered work, knowingly relying on a patent license,
500 | and the Corresponding Source of the work is not available for anyone
501 | to copy, free of charge and under the terms of this License, through a
502 | publicly available network server or other readily accessible means,
503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
507 | license to downstream recipients.  "Knowingly relying" means you have
508 | actual knowledge that, but for the patent license, your conveying the
509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
511 | country that you have reason to believe are valid.
512 | 
513 |   If, pursuant to or in connection with a single transaction or
514 | arrangement, you convey, or propagate by procuring conveyance of, a
515 | covered work, and grant a patent license to some of the parties
516 | receiving the covered work authorizing them to use, propagate, modify
517 | or convey a specific copy of the covered work, then the patent license
518 | you grant is automatically extended to all recipients of the covered
519 | work and works based on it.
520 | 
521 |   A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License.  You may not convey a covered
525 | work if you are a party to an arrangement with a third party that is
526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
528 | the work, and under which the third party grants, to any of the
529 | parties who would receive the covered work from you, a discriminatory
530 | patent license (a) in connection with copies of the covered work
531 | conveyed by you (or copies made from those copies), or (b) primarily
532 | for and in connection with specific products or compilations that
533 | contain the covered work, unless you entered into that arrangement,
534 | or that patent license was granted, prior to 28 March 2007.
535 | 
536 |   Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 | 
540 |   12. No Surrender of Others' Freedom.
541 | 
542 |   If conditions are imposed on you (whether by court order, agreement or
543 | otherwise) that contradict the conditions of this License, they do not
544 | excuse you from the conditions of this License.  If you cannot convey a
545 | covered work so as to satisfy simultaneously your obligations under this
546 | License and any other pertinent obligations, then as a consequence you may
547 | not convey it at all.  For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 | 
552 |   13. Use with the GNU Affero General Public License.
553 | 
554 |   Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work.  The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 | 
563 |   14. Revised Versions of this License.
564 | 
565 |   The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time.  Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 | 
570 |   Each version is given a distinguishing version number.  If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation.  If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 | 
579 |   If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 | 
584 |   Later license versions may give you additional or different
585 | permissions.  However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 | 
589 |   15. Disclaimer of Warranty.
590 | 
591 |   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 | 
600 |   16. Limitation of Liability.
601 | 
602 |   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 | 
612 |   17. Interpretation of Sections 15 and 16.
613 | 
614 |   If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 | 
621 |                      END OF TERMS AND CONDITIONS
622 | 
623 |             How to Apply These Terms to Your New Programs
624 | 
625 |   If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 | 
629 |   To do so, attach the following notices to the program.  It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 | 
634 |     <one line to give the program's name and a brief idea of what it does.>
635 |     Copyright (C) <year>  <name of author>
636 | 
637 |     This program is free software: you can redistribute it and/or modify
638 |     it under the terms of the GNU General Public License as published by
639 |     the Free Software Foundation, either version 3 of the License, or
640 |     (at your option) any later version.
641 | 
642 |     This program is distributed in the hope that it will be useful,
643 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
644 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645 |     GNU General Public License for more details.
646 | 
647 |     You should have received a copy of the GNU General Public License
648 |     along with this program.  If not, see <http://www.gnu.org/licenses/>.
649 | 
650 | Also add information on how to contact you by electronic and paper mail.
651 | 
652 |   If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 | 
655 |     <program>  Copyright (C) <year>  <name of author>
656 |     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 |     This is free software, and you are welcome to redistribute it
658 |     under certain conditions; type `show c' for details.
659 | 
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License.  Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 | 
664 |   You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | <http://www.gnu.org/licenses/>.
668 | 
669 |   The GNU General Public License does not permit incorporating your program
670 | into proprietary programs.  If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library.  If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License.  But first, please read
674 | <http://www.gnu.org/philosophy/why-not-lgpl.html>.
675 | 


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