scratch – Blame information for rev 96
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Rev | Author | Line No. | Line |
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28 | office | 1 | <?php |
2 | |||
3 | ########################################################################### |
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4 | ## Copyright (C) Wizardry and Steamworks 2017 - License: GNU GPLv3 ## |
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5 | ########################################################################### |
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6 | |||
66 | office | 7 | require_once('php/pseudocrypt.php'); |
8 | require_once('php/functions.php'); |
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87 | office | 9 | require_once('vendor/autoload.php'); |
28 | office | 10 | |
67 | office | 11 | ### Load configuration. |
12 | $config = spyc_load_file('config.yaml'); |
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13 | |||
93 | office | 14 | #### Script restrictions. |
96 | office | 15 | session_start(); |
16 | if (empty($_POST['token']) || !hash_equals($_SESSION['token'], $_POST['token'])) { |
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93 | office | 17 | http_response_code(403); |
18 | die('Forbidden.'); |
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19 | } |
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20 | |||
94 | office | 21 | #### Check if the fingerprint and action are set parameters. |
37 | office | 22 | if(!isset($_POST['fingerprint']) or empty($_POST['fingerprint']) or |
94 | office | 23 | !preg_match('/^[A-Za-z0-9]{32}$/', $_POST['fingerprint']) or |
57 | office | 24 | !isset($_POST['action']) or empty($_POST['action'])) { |
81 | office | 25 | http_response_code(500); |
26 | die('Internal server error.'); |
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57 | office | 27 | } |
37 | office | 28 | |
29 | #### Check fingerprint consistency. |
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30 | $fingerprint = strtoupper($_POST['fingerprint']); |
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57 | office | 31 | if(strlen($fingerprint) !== 32) { |
81 | office | 32 | http_response_code(500); |
33 | die('Internal server error.'); |
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57 | office | 34 | } |
37 | office | 35 | |
36 | $action = strtoupper($_POST['action']); |
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37 | |||
38 | #### Data must be sent in order to save a file. |
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57 | office | 39 | if($action === 'SAVE' and !isset($_POST['data'])) { |
81 | office | 40 | http_response_code(500); |
41 | die('Internal server error.'); |
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57 | office | 42 | } |
37 | office | 43 | |
44 | #### Hash fingerprint. |
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45 | $file = strtolower( |
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46 | PseudoCrypt::hash( |
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47 | preg_replace( |
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48 | '/\D/', |
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49 | '', |
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50 | hash( |
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51 | 'sha512', |
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50 | office | 52 | $fingerprint |
37 | office | 53 | ) |
48 | office | 54 | ), |
67 | office | 55 | $config['ASSET_HASH_SIZE'] |
49 | office | 56 | ) |
37 | office | 57 | ); |
58 | |||
28 | office | 59 | #### Build the user path. |
60 | $userPath = join( |
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61 | DIRECTORY_SEPARATOR, |
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62 | array( |
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67 | office | 63 | $config['STORE_FOLDER'], |
37 | office | 64 | $file |
28 | office | 65 | ) |
66 | ); |
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67 | |||
68 | #### Check for path traversals |
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49 | office | 69 | $pathPart = pathinfo($userPath.'.html'); |
28 | office | 70 | if (strcasecmp( |
67 | office | 71 | realpath($pathPart['dirname']), realpath($config['STORE_FOLDER'])) != 0) { |
81 | office | 72 | http_response_code(500); |
73 | die('Internal server error.'); |
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57 | office | 74 | } |
28 | office | 75 | |
37 | office | 76 | switch($action) { |
77 | case 'SAVE': |
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28 | office | 78 | #### Store the file. |
49 | office | 79 | atomized_put_contents($userPath.'.html', $_POST['data']); |
28 | office | 80 | break; |
37 | office | 81 | case 'LOAD': |
57 | office | 82 | if(!file_exists($userPath.'.html')) { |
62 | office | 83 | ### If the file does not exist, present an empty file instead of 404. |
84 | echo ''; |
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29 | office | 85 | return; |
57 | office | 86 | } |
53 | office | 87 | ### Set no-cache |
88 | header('Content-Type: text/html; charset=utf-8'); |
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89 | header('Cache-Control: no-cache, no-store, must-revalidate'); |
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90 | header('Pragma: no-cache'); |
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91 | header('Expires: 0'); |
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92 | ### Open MIME info database and send the content type. |
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93 | header('Content-type: text/html'); |
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94 | ### Send the file along with the inline content disposition. |
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95 | header('Content-length: '.(int)get_file_size($userPath.'.html')); |
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96 | header('Content-Disposition: inline; filename="' . basename($userPath.'.html') . '"'); |
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97 | header('X-Sendfile: '.$userPath.'.html'); |
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28 | office | 98 | break; |
99 | } |
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100 |