scratch – Blame information for rev 81

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28 office 1 <?php
2  
3 ###########################################################################
4 ## Copyright (C) Wizardry and Steamworks 2017 - License: GNU GPLv3 ##
5 ###########################################################################
6  
66 office 7 require_once('php/pseudocrypt.php');
8 require_once('php/functions.php');
67 office 9 require_once('vendor/mustangostang/spyc/Spyc.php');
28 office 10  
67 office 11 ### Load configuration.
12 $config = spyc_load_file('config.yaml');
13  
37 office 14 if(!isset($_POST['fingerprint']) or empty($_POST['fingerprint']) or
57 office 15 !isset($_POST['action']) or empty($_POST['action'])) {
81 office 16 http_response_code(500);
17 die('Internal server error.');
57 office 18 }
37 office 19  
20 #### Check fingerprint consistency.
21 $fingerprint = strtoupper($_POST['fingerprint']);
57 office 22 if(strlen($fingerprint) !== 32) {
81 office 23 http_response_code(500);
24 die('Internal server error.');
57 office 25 }
37 office 26  
27 $action = strtoupper($_POST['action']);
28  
29 #### Data must be sent in order to save a file.
57 office 30 if($action === 'SAVE' and !isset($_POST['data'])) {
81 office 31 http_response_code(500);
32 die('Internal server error.');
57 office 33 }
37 office 34  
35 #### Hash fingerprint.
36 $file = strtolower(
37 PseudoCrypt::hash(
38 preg_replace(
39 '/\D/',
40 '',
41 hash(
42 'sha512',
50 office 43 $fingerprint
37 office 44 )
48 office 45 ),
67 office 46 $config['ASSET_HASH_SIZE']
49 office 47 )
37 office 48 );
49  
28 office 50 #### Build the user path.
51 $userPath = join(
52 DIRECTORY_SEPARATOR,
53 array(
67 office 54 $config['STORE_FOLDER'],
37 office 55 $file
28 office 56 )
57 );
58  
59 #### Check for path traversals
49 office 60 $pathPart = pathinfo($userPath.'.html');
28 office 61 if (strcasecmp(
67 office 62 realpath($pathPart['dirname']), realpath($config['STORE_FOLDER'])) != 0) {
81 office 63 http_response_code(500);
64 die('Internal server error.');
57 office 65 }
28 office 66  
37 office 67 switch($action) {
68 case 'SAVE':
28 office 69 #### Store the file.
49 office 70 atomized_put_contents($userPath.'.html', $_POST['data']);
28 office 71 break;
37 office 72 case 'LOAD':
57 office 73 if(!file_exists($userPath.'.html')) {
62 office 74 ### If the file does not exist, present an empty file instead of 404.
75 echo '';
29 office 76 return;
57 office 77 }
53 office 78 ### Set no-cache
79 header('Content-Type: text/html; charset=utf-8');
80 header('Cache-Control: no-cache, no-store, must-revalidate');
81 header('Pragma: no-cache');
82 header('Expires: 0');
83 ### Open MIME info database and send the content type.
84 header('Content-type: text/html');
85 ### Send the file along with the inline content disposition.
86 header('Content-length: '.(int)get_file_size($userPath.'.html'));
87 header('Content-Disposition: inline; filename="' . basename($userPath.'.html') . '"');
88 header('X-Sendfile: '.$userPath.'.html');
28 office 89 break;
90 }
91