scratch – Blame information for rev 96
?pathlinks?
Rev | Author | Line No. | Line |
---|---|---|---|
7 | 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'); |
||
87 | office | 9 | require_once('vendor/autoload.php'); |
7 | office | 10 | |
67 | office | 11 | ### Load configuration. |
12 | $config = spyc_load_file('config.yaml'); |
||
13 | |||
52 | office | 14 | #### POST -> upload / GET -> download |
15 | switch ($_SERVER['REQUEST_METHOD']) { |
||
16 | case 'POST': |
||
93 | office | 17 | #### Script restrictions. |
96 | office | 18 | session_start(); |
19 | if (empty($_POST['token']) || !hash_equals($_SESSION['token'], $_POST['token'])) { |
||
93 | office | 20 | http_response_code(403); |
21 | die('Forbidden.'); |
||
22 | } |
||
52 | office | 23 | #### Retrieve uploaded file. |
24 | if (!empty($_FILES['file']) and |
||
25 | is_uploaded_file($_FILES['file']['tmp_name'])) { |
||
67 | office | 26 | if($_FILES['file']['size'] > $config['ALLOWED_ASSET_SIZE'] * 1048576) { |
81 | office | 27 | http_response_code(403); |
28 | die('File size exceeds '.$config['ALLOWED_ASSET_SIZE'].'MiB.'); |
||
57 | office | 29 | } |
52 | office | 30 | # Regular multipart/form-data upload. |
31 | $name = $_FILES['file']['name']; |
||
57 | office | 32 | $data = atomized_get_contents($_FILES['file']['tmp_name']); |
52 | office | 33 | } else { |
67 | office | 34 | if((int)get_file_size("php://input") > $config['ALLOWED_ASSET_SIZE'] * 1048576) { |
81 | office | 35 | http_response_code(403); |
36 | die('File size exceeds '.$config['ALLOWED_ASSET_SIZE'].'MiB.'); |
||
57 | office | 37 | } |
52 | office | 38 | # Raw POST data. |
39 | $name = urldecode(@$_SERVER['HTTP_X_FILE_NAME']); |
||
57 | office | 40 | $data = atomized_get_contents("php://input"); |
52 | office | 41 | } |
7 | office | 42 | |
52 | office | 43 | #### Grab the file extension. |
44 | $fileExtension = pathinfo($name, PATHINFO_EXTENSION); |
||
11 | office | 45 | |
52 | office | 46 | #### If the extension is not allowed then change it to a text extension. |
47 | if (!isset($fileExtension) || |
||
48 | !in_array(strtoupper($fileExtension), |
||
67 | office | 49 | array_map('strtoupper', $config['ALLOWED_FILE_EXTENSIONS']))) { |
81 | office | 50 | http_response_code(403); |
51 | die('File extension not allowed.'); |
||
52 | office | 52 | } |
14 | office | 53 | |
52 | office | 54 | #### Hash filename. |
55 | $file = strtolower( |
||
56 | PseudoCrypt::hash( |
||
57 | preg_replace( |
||
58 | '/\D/', |
||
59 | '', |
||
60 | hash( |
||
61 | 'sha512', |
||
62 | $data |
||
63 | ) |
||
64 | ), |
||
67 | office | 65 | $config['ASSET_HASH_SIZE'] |
7 | office | 66 | ) |
52 | office | 67 | ); |
14 | office | 68 | |
52 | office | 69 | #### Build the user path. |
70 | $userPath = join( |
||
71 | DIRECTORY_SEPARATOR, |
||
72 | array( |
||
67 | office | 73 | $config['STORE_FOLDER'], |
52 | office | 74 | $file |
75 | ) |
||
76 | ); |
||
11 | office | 77 | |
52 | office | 78 | #### Check for path traversals |
79 | $pathPart = pathinfo($userPath.'.'.$fileExtension); |
||
80 | if (strcasecmp( |
||
67 | office | 81 | realpath($pathPart['dirname']), realpath($config['STORE_FOLDER'])) != 0) { |
81 | office | 82 | http_response_code(500); |
83 | die('Internal server error.'); |
||
52 | office | 84 | } |
7 | office | 85 | |
52 | office | 86 | #### Store the file. |
81 | office | 87 | $timestamp = atomized_put_contents($userPath.'.'.$fileExtension, $data); |
14 | office | 88 | |
90 | office | 89 | ### Hook for various file extensions. |
90 | $opengraph = FALSE; |
||
91 | switch(strtoupper($fileExtension)) { |
||
92 | case 'GIF': |
||
93 | $opengraph = TRUE; |
||
94 | break; |
||
95 | } |
||
96 | |||
52 | office | 97 | ### Return the URL to the file. |
98 | header('Content-Type: text/plain; charset=utf-8'); |
||
81 | office | 99 | echo json_encode( |
100 | array( |
||
101 | "hash" => $file, |
||
90 | office | 102 | "timestamp" => $timestamp, |
103 | "opengraph" => $opengraph |
||
81 | office | 104 | ) |
105 | ); |
||
52 | office | 106 | break; |
107 | case 'GET': |
||
83 | office | 108 | ### Tell browser not to cache files. |
109 | header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0"); |
||
110 | header("Cache-Control: post-check=0, pre-check=0", false); |
||
111 | header("Pragma: no-cache"); |
||
112 | |||
52 | office | 113 | ### If no file has been specified for download then return. |
81 | office | 114 | if (!isset($_GET['hash']) or empty($_GET['hash'])) { |
115 | http_response_code(404); |
||
116 | die('File not found.'); |
||
52 | office | 117 | } |
118 | |||
53 | office | 119 | ### Find the requested file. |
52 | office | 120 | $file = array_shift( |
121 | preg_grep( |
||
81 | office | 122 | '/'.$_GET['hash'].'/', |
67 | office | 123 | scandir($config['STORE_FOLDER']) |
52 | office | 124 | ) |
125 | ); |
||
126 | |||
81 | office | 127 | if (!isset($file) or empty($file)) { |
128 | http_response_code(404); |
||
129 | die('File not found.'); |
||
130 | } |
||
53 | office | 131 | |
132 | ### Check the path for path traversals. |
||
133 | $fileExtension = pathinfo($file, PATHINFO_EXTENSION); |
||
52 | office | 134 | |
53 | office | 135 | #### If the extension is not allowed then return. |
136 | if (!isset($fileExtension) || |
||
137 | !in_array(strtoupper($fileExtension), |
||
67 | office | 138 | array_map('strtoupper', $config['ALLOWED_FILE_EXTENSIONS']))) { |
81 | office | 139 | http_response_code(403); |
140 | die('File extension not allowed.'); |
||
52 | office | 141 | } |
53 | office | 142 | |
143 | #### Build the user path. |
||
144 | $userPath = join( |
||
145 | DIRECTORY_SEPARATOR, |
||
146 | array( |
||
67 | office | 147 | $config['STORE_FOLDER'], |
53 | office | 148 | $file |
149 | ) |
||
150 | ); |
||
52 | office | 151 | |
53 | office | 152 | #### Check for path traversals |
153 | $pathPart = pathinfo($userPath); |
||
154 | if (strcasecmp( |
||
67 | office | 155 | realpath($pathPart['dirname']), realpath($config['STORE_FOLDER'])) != 0) { |
81 | office | 156 | http_response_code(500); |
157 | die('Internal server error.'); |
||
53 | office | 158 | } |
159 | |||
83 | office | 160 | ### Hook for various file extensions. |
53 | office | 161 | switch(strtoupper($fileExtension)) { |
162 | case "HTML": |
||
163 | case "HTM": |
||
164 | header('Content-type: text/html'); |
||
165 | break; |
||
166 | break; |
||
83 | office | 167 | case "URL": |
91 | office | 168 | if(preg_match( |
169 | "/URL=(https?:\/\/[\-_\.\+!\*'\(\),a-zA-Z0-9]+:?[0-9]{0,5}\/.*?)\n/", |
||
170 | file_get_contents($userPath), $matches)) { |
||
83 | office | 171 | header('Location: '.$matches[1]); |
172 | return; |
||
173 | } |
||
174 | break; |
||
53 | office | 175 | default: |
176 | ### Open MIME info database and send the content type. |
||
177 | $finfo = finfo_open(FILEINFO_MIME_TYPE); |
||
178 | if (!$finfo) { |
||
81 | office | 179 | http_response_code(500); |
180 | die('Internal server error.'); |
||
53 | office | 181 | } |
182 | header('Content-type: '.finfo_file($finfo, $userPath)); |
||
183 | finfo_close($finfo); |
||
184 | break; |
||
185 | } |
||
186 | |||
52 | office | 187 | ### Send the file along with the inline content disposition. |
53 | office | 188 | header('Content-length: '.(int)get_file_size($userPath)); |
189 | header('Content-Disposition: inline; filename="' . basename($userPath) . '"'); |
||
190 | header('Content-Transfer-Encoding: binary'); |
||
191 | header('X-Sendfile: '.$userPath); |
||
52 | office | 192 | break; |
193 | } |