f.php

   1 <?php
   2 /*
   3  *  Jirafeau, your web file repository
   4  *  Copyright (C) 2008  Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
   5  *  Copyright (C) 2015  Jerome Jutteau <j.jutteau@gmail.com>
   6  *
   7  *  This program is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU Affero General Public License as
   9  *  published by the Free Software Foundation, either version 3 of the
  10  *  License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Affero General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Affero General Public License
  18  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20 define ('JIRAFEAU_ROOT', dirname (__FILE__) . '/');
  21
  22 require (JIRAFEAU_ROOT . 'lib/settings.php');
  23 require (JIRAFEAU_ROOT . 'lib/functions.php');
  24 require (JIRAFEAU_ROOT . 'lib/lang.php');
  25
  26 if (!isset ($_GET['h']) || empty ($_GET['h']))
  27 {
  28     header ('Location: ' . $cfg['web_root']);
  29     exit;
  30 }
  31
  32 /* Operations may take a long time.
  33  * Be sure PHP's safe mode is off.
  34  */
  35 @set_time_limit(0);
  36 /* Remove errors. */
  37 @error_reporting(0);
  38
  39 $link_name = $_GET['h'];
  40
  41 if (!preg_match ('/[0-9a-zA-Z_-]+$/', $link_name))
  42 {
  43     require (JIRAFEAU_ROOT.'lib/template/header.php');
  44     echo '<div class="error"><p>' . t('Sorry, the requested file is not found') . '</p></div>';
  45     require (JIRAFEAU_ROOT.'lib/template/footer.php');
  46     exit;
  47 }
  48
  49 $link = jirafeau_get_link ($link_name);
  50 if (count ($link) == 0)
  51 {
  52     /* Try alias. */
  53     $alias = jirafeau_get_alias (md5 ($link_name));
  54     if (count ($alias) > 0)
  55         $link = jirafeau_get_link ($alias["destination"]);
  56 }
  57 if (count ($link) == 0)
  58 {
  59     require (JIRAFEAU_ROOT.'lib/template/header.php');
  60     echo '<div class="error"><p>' . t('Sorry, the requested file is not found') .
  61     '</p></div>';
  62     require (JIRAFEAU_ROOT.'lib/template/footer.php');
  63     exit;
  64 }
  65
  66 $delete_code = '';
  67 if (isset ($_GET['d']) && !empty ($_GET['d']) &&  $_GET['d'] != '1')
  68     $delete_code = $_GET['d'];
  69
  70 $crypt_key = '';
  71 if (isset ($_GET['k']) && !empty ($_GET['k']))
  72     $crypt_key = $_GET['k'];
  73
  74 $do_download = false;
  75 if (isset ($_GET['d']) && $_GET['d'] == '1')
  76     $do_download = true;
  77
  78 $do_preview = false;
  79 if (isset ($_GET['p']) && !empty ($_GET['p']))
  80     $do_preview = true;
  81
  82 $p = s2p ($link['md5']);
  83 if (!file_exists (VAR_FILES . $p . $link['md5']))
  84 {
  85     jirafeau_delete_link ($link_name);
  86     require (JIRAFEAU_ROOT.'lib/template/header.php');
  87     echo '<div class="error"><p>'.t('File not available.').
  88     '</p></div>';
  89     require (JIRAFEAU_ROOT.'lib/template/footer.php');
  90     exit;
  91 }
  92
  93 if (!empty ($delete_code) && $delete_code == $link['link_code'])
  94 {
  95     jirafeau_delete_link ($link_name);
  96     require (JIRAFEAU_ROOT.'lib/template/header.php');
  97     echo '<div class="message"><p>'.t('File has been deleted.').
  98      '</p></div>';
  99     require (JIRAFEAU_ROOT.'lib/template/footer.php');
 100     exit;
 101 }
 102
 103 if ($link['time'] != JIRAFEAU_INFINITY && time () > $link['time'])
 104 {
 105     jirafeau_delete_link ($link_name);
 106     require (JIRAFEAU_ROOT.'lib/template/header.php');
 107     echo '<div class="error"><p>'.
 108     t('The time limit of this file has expired.') . ' ' .
 109     t('File has been deleted.') .
 110     '</p></div>';
 111     require (JIRAFEAU_ROOT . 'lib/template/footer.php');
 112     exit;
 113 }
 114
 115 if (empty ($crypt_key) && $link['crypted'])
 116 {
 117     require (JIRAFEAU_ROOT.'lib/template/header.php');
 118     echo '<div class="error"><p>' . t('Sorry, the requested file is not found') .
 119     '</p></div>';
 120     require (JIRAFEAU_ROOT.'lib/template/footer.php');
 121     exit;
 122 }
 123
 124 $password_challenged = false;
 125 if (!empty ($link['key']))
 126 {
 127     if (!isset ($_POST['key']))
 128     {
 129         require (JIRAFEAU_ROOT.'lib/template/header.php');
 130         echo '<div>' .
 131              '<form action = "';
 132         echo $cfg['web_root'] . '/f.php';
 133         echo '" ' .
 134              'method = "post" id = "submit_post">'; ?>
 135              <input type = "hidden" name = "jirafeau" value = "<?php echo JIRAFEAU_VERSION ?>"/><?php
 136         echo '<fieldset>' .
 137              '<legend>' . t('Password protection') .
 138              '</legend><table><tr><td>' .
 139              t('Give the password of this file') . ' : ' .
 140              '<input type = "password" name = "key" />' .
 141              '</td></tr>' .
 142              '<tr><td>' .
 143              t('By using our services, you accept our'). ' <a href="' . $cfg['web_root'] . 'tos.php' . '">' . t('Terms of Service') . '</a>.' .
 144              '</td></tr>';
 145
 146         if ($link['onetime'] == 'O')
 147         {
 148             echo '<tr><td id="self_destruct">' .
 149                  t('Warning, this file will self-destruct after being read') .
 150                  '</td></tr>';
 151         }
 152
 153         ?><tr><td><input type="submit" id = "submit_download"  value="<?php echo t('Download'); ?>"
 154         onclick="document.getElementById('submit_post').action='
 155 <?php
 156         echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;d=1';
 157         if (!empty($crypt_key))
 158             echo '&amp;k=' . urlencode($crypt_key);
 159 ?>';
 160         document.getElementById('submit_download').submit ();"/><?php
 161         if ($cfg['preview'] && jirafeau_is_viewable($link['mime_type']))
 162         {
 163             ?><input type="submit" id = "submit_preview"  value="<?php echo t('Preview'); ?>"
 164             onclick="document.getElementById('submit_post').action='
 165             <?php
 166             echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;p=1';
 167             if (!empty($crypt_key))
 168                 echo '&amp;k=' . urlencode($crypt_key);
 169             ?>';
 170             document.getElementById('submit_preview').submit ();"/><?php
 171         }
 172         echo '</td></tr></table></fieldset></form></div>';
 173         require (JIRAFEAU_ROOT.'lib/template/footer.php');
 174         exit;
 175     }
 176     else
 177     {
 178         if ($link['key'] == md5 ($_POST['key']))
 179             $password_challenged = true;
 180         else
 181         {
 182             sleep (2);
 183             require (JIRAFEAU_ROOT.'lib/template/header.php');
 184             echo '<div class="error"><p>' . t('Access denied') .
 185             '</p></div>';
 186             require (JIRAFEAU_ROOT.'lib/template/footer.php');
 187             exit;
 188         }
 189     }
 190 }
 191
 192 if (!$password_challenged && !$do_download && !$do_preview)
 193 {
 194         require (JIRAFEAU_ROOT.'lib/template/header.php');
 195         echo '<div>' .
 196              '<form action = "';
 197         echo $cfg['web_root'] . '/f.php';
 198         echo '" ' .
 199              'method = "post" id = "submit_post">'; ?>
 200              <input type = "hidden" name = "jirafeau" value = "<?php echo JIRAFEAU_VERSION ?>"/><?php
 201         echo '<fieldset><legend>' . htmlspecialchars($link['file_name']) . '</legend><table>' .
 202              '<tr><td>' .
 203              t('You are about to download') . ' "' . htmlspecialchars($link['file_name']) . '" (' . jirafeau_human_size($link['file_size']) . ').' .
 204              '</td></tr>' .
 205              '<tr><td>' .
 206              t('By using our services, you accept our'). ' <a href="' . $cfg['web_root'] . 'tos.php' . '">' . t('Terms of Service') . '</a>.' .
 207              '</td></tr>';
 208
 209         if ($link['onetime'] == 'O')
 210         {
 211             echo '<tr><td id="self_destruct">' .
 212                  t('Warning, this file will self-destruct after being read') .
 213                  '</td></tr>';
 214         }
 215
 216         ?>
 217         <tr><td><input type="submit" id = "submit_download"  value="<?php echo t('Download'); ?>"
 218         onclick="document.getElementById('submit_post').action='
 219 <?php
 220         echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;d=1';
 221         if (!empty($crypt_key))
 222             echo '&amp;k=' . urlencode($crypt_key);
 223 ?>';
 224         document.getElementById('submit_post').submit ();"/><?php
 225
 226         if ($cfg['preview'] && jirafeau_is_viewable($link['mime_type']))
 227         {
 228             ?><input type="submit" id = "submit_preview"  value="<?php echo t('Preview'); ?>"
 229             onclick="document.getElementById('submit_post').action='
 230 <?php
 231         echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;p=1';
 232         if (!empty($crypt_key))
 233             echo '&amp;k=' . urlencode($crypt_key);
 234 ?>';
 235         document.getElementById('submit_post').submit ();"/><?php
 236         }
 237         echo '</td></tr>';
 238         echo '</table></fieldset></form></div>';
 239         require (JIRAFEAU_ROOT.'lib/template/footer.php');
 240         exit;
 241 }
 242
 243 header ('HTTP/1.0 200 OK');
 244 header ('Content-Length: ' . $link['file_size']);
 245 if (!jirafeau_is_viewable ($link['mime_type']) || !$cfg['preview'] || $do_download)
 246     header ('Content-Disposition: attachment; filename="' . $link['file_name'] . '"');
 247 else
 248     header ('Content-Disposition: filename="' . $link['file_name'] . '"');
 249 header ('Content-Type: ' . $link['mime_type']);
 250 header ('Content-MD5: ' . hex_to_base64($link['md5']));
 251
 252 /* Read encrypted file. */
 253 if ($link['crypted'])
 254 {
 255     /* Init module */
 256     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
 257     /* Extract key and iv. */
 258     $md5_key = md5 ($crypt_key);
 259     $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
 260     /* Init module. */
 261     mcrypt_generic_init ($m, $md5_key, $iv);
 262     /* Decrypt file. */
 263     $r = fopen (VAR_FILES . $p . $link['md5'], 'r');
 264     while (!feof ($r))
 265     {
 266         $dec = mdecrypt_generic($m, fread ($r, 1024));
 267         print $dec;
 268         ob_flush();
 269     }
 270     fclose ($r);
 271     /* Cleanup. */
 272     mcrypt_generic_deinit($m);
 273     mcrypt_module_close($m);
 274 }
 275 /* Read file. */
 276 else
 277 {
 278     $r = fopen (VAR_FILES . $p . $link['md5'], 'r');
 279     while (!feof ($r))
 280     {
 281         print fread ($r, 1024);
 282         ob_flush();
 283     }
 284     fclose ($r);
 285 }
 286
 287 if ($link['onetime'] == 'O')
 288     jirafeau_delete_link ($link_name);
 289 exit;
 290
 291 ?>