Jirafeau/f.php

<?php
/*
 *  Jirafeau, your web file repository
 *  Copyright (C) 2008  Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
 *  Copyright (C) 2015  Jerome Jutteau <j.jutteau@gmail.com>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
define ('JIRAFEAU_ROOT', dirname (__FILE__) . '/');

require (JIRAFEAU_ROOT . 'lib/lang.php');
require (JIRAFEAU_ROOT . 'lib/config.original.php');
require (JIRAFEAU_ROOT . 'lib/settings.php');
require (JIRAFEAU_ROOT . 'lib/functions.php');

if (!isset ($_GET['h']) || empty ($_GET['h']))
{
    header ('Location: ' . $cfg['web_root']);
    exit;
}

/* Operations may take a long time.
 * Be sure PHP's safe mode is off.
 */
@set_time_limit(0);
/* Remove errors. */
@error_reporting(0);

$link_name = $_GET['h'];

if (!preg_match ('/[0-9a-zA-Z_-]+$/', $link_name))
{
    require (JIRAFEAU_ROOT.'lib/template/header.php');
    echo '<div class="error"><p>' . t('Sorry, the requested file is not found') . '</p></div>';
    require (JIRAFEAU_ROOT.'lib/template/footer.php');
    exit;
}

$link = jirafeau_get_link ($link_name);
if (count ($link) == 0)
{
    require (JIRAFEAU_ROOT.'lib/template/header.php');
    echo '<div class="error"><p>' . t('Sorry, the requested file is not found') .
    '</p></div>';
    require (JIRAFEAU_ROOT.'lib/template/footer.php');
    exit;
}

$delete_code = '';
if (isset ($_GET['d']) && !empty ($_GET['d']) &&  $_GET['d'] != '1')
    $delete_code = $_GET['d'];

$crypt_key = '';
if (isset ($_GET['k']) && !empty ($_GET['k']))
    $crypt_key = $_GET['k'];

$do_download = false;
if (isset ($_GET['d']) && $_GET['d'] == '1')
    $do_download = true;

$do_preview = false;
if (isset ($_GET['p']) && !empty ($_GET['p']))
    $do_preview = true;

$p = s2p ($link['md5']);
if (!file_exists (VAR_FILES . $p . $link['md5']))
{
    jirafeau_delete_link ($link_name);
    require (JIRAFEAU_ROOT.'lib/template/header.php');
    echo '<div class="error"><p>'.t('File not available.').
    '</p></div>';
    require (JIRAFEAU_ROOT.'lib/template/footer.php');
    exit;
}

if (!empty ($delete_code) && $delete_code == $link['link_code'])
{
    jirafeau_delete_link ($link_name);
    require (JIRAFEAU_ROOT.'lib/template/header.php');
    echo '<div class="message"><p>'.t('File has been deleted.').
     '</p></div>';
    require (JIRAFEAU_ROOT.'lib/template/footer.php');
    exit;
}

if ($link['time'] != JIRAFEAU_INFINITY && time () > $link['time'])
{
    jirafeau_delete_link ($link_name);
    require (JIRAFEAU_ROOT.'lib/template/header.php');
    echo '<div class="error"><p>'.
    t('The time limit of this file has expired.') . ' ' .
    t('File has been deleted.') .
    '</p></div>';
    require (JIRAFEAU_ROOT . 'lib/template/footer.php');
    exit;
}

if (empty ($crypt_key) && $link['crypted'])
{
    require (JIRAFEAU_ROOT.'lib/template/header.php');
    echo '<div class="error"><p>' . t('Sorry, the requested file is not found') .
    '</p></div>';
    require (JIRAFEAU_ROOT.'lib/template/footer.php');
    exit;
}

$password_challenged = false;
if (!empty ($link['key']))
{
    if (!isset ($_POST['key']))
    {
        require (JIRAFEAU_ROOT.'lib/template/header.php');
        echo '<div>' .
             '<form action = "';
        echo $cfg['web_root'] . '/f.php';
        echo '" ' .
             'method = "post" id = "submit_post">'; ?>
             <input type = "hidden" name = "jirafeau" value = "<?php echo JIRAFEAU_VERSION ?>"/><?php
        echo '<fieldset>' .
             '<legend>' . t('Password protection') .
             '</legend><table><tr><td>' .
             t('Give the password of this file') . ' : ' .
             '<input type = "password" name = "key" />' .
             '</td></tr>' .
             '<tr><td>' .
             t('By using our services, you accept our'). ' <a href="' . $cfg['web_root'] . '/tos.php' . '">' . t('Term Of Service') . '</a>' .
             '</td></tr>';

        if ($link['onetime'] == 'O')
        {
            echo '<tr><td id="self_destruct">' .
                 t('Warning, this file will self-destruct after being read') .
                 '</td></tr>';
        }

        ?><tr><td><input type="submit" id = "submit_download"  value="<?php echo t('Download'); ?>"
        onclick="document.getElementById('submit_post').action='
<?php
        echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;d=1';
        if (!empty($crypt_key))
            echo '&amp;k=' . urlencode($crypt_key);
?>';
        document.getElementById('submit_download').submit ();"/><?php
        if ($cfg['preview'] && jirafeau_is_viewable($link['mime_type']))
        {
            ?><input type="submit" id = "submit_preview"  value="<?php echo t('Preview'); ?>"
            onclick="document.getElementById('submit_post').action='
            <?php
            echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;p=1';
            if (!empty($crypt_key))
                echo '&amp;k=' . urlencode($crypt_key);
            ?>';
            document.getElementById('submit_preview').submit ();"/><?php
        }
        echo '</td></tr></table></fieldset></form></div>';
        require (JIRAFEAU_ROOT.'lib/template/footer.php');
        exit;
    }
    else
    {
        if ($link['key'] == md5 ($_POST['key']))
            $password_challenged = true;
	else
        {
            require (JIRAFEAU_ROOT.'lib/template/header.php');
            echo '<div class="error"><p>' . t('Access denied') .
            '</p></div>';
            require (JIRAFEAU_ROOT.'lib/template/footer.php');
            exit;
        }
    }
}

if (!$password_challenged && !$do_download && !$do_preview)
{
        require (JIRAFEAU_ROOT.'lib/template/header.php');
        echo '<div>' .
             '<form action = "';
        echo $cfg['web_root'] . '/f.php';
        echo '" ' .
             'method = "post" id = "submit_post">'; ?>
             <input type = "hidden" name = "jirafeau" value = "<?php echo JIRAFEAU_VERSION ?>"/><?php
        echo '<fieldset><legend>' . htmlspecialchars($link['file_name']) . '</legend><table>' .
             '<tr><td>' .
             t('You are about to download') . ' "' . htmlspecialchars($link['file_name']) . '" (' . jirafeau_human_size($link['file_size']) . ')' .
             '</td></tr>' .
             '<tr><td>' .
             t('By using our services, you accept our'). ' <a href="' . $cfg['web_root'] . '/tos.php' . '">' . t('Term Of Service') . '</a>' .
             '</td></tr>';

        if ($link['onetime'] == 'O')
        {
            echo '<tr><td id="self_destruct">' .
                 t('Warning, this file will self-destruct after being read') .
                 '</td></tr>';
        }

        ?>
        <tr><td><input type="submit" id = "submit_download"  value="<?php echo t('Download'); ?>"
        onclick="document.getElementById('submit_post').action='
<?php
        echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;d=1';
        if (!empty($crypt_key))
            echo '&amp;k=' . urlencode($crypt_key);
?>';
        document.getElementById('submit_post').submit ();"/><?php

        if ($cfg['preview'] && jirafeau_is_viewable($link['mime_type']))
        {
            ?><input type="submit" id = "submit_preview"  value="<?php echo t('Preview'); ?>"
            onclick="document.getElementById('submit_post').action='
<?php
        echo $cfg['web_root'] . '/f.php?h=' . $link_name . '&amp;p=1';
        if (!empty($crypt_key))
            echo '&amp;k=' . urlencode($crypt_key);
?>';
        document.getElementById('submit_post').submit ();"/><?php
        }
        echo '</td></tr>';
        echo '</table></fieldset></form></div>';
        require (JIRAFEAU_ROOT.'lib/template/footer.php');
        exit;
}

header ('HTTP/1.0 200 OK');
header ('Content-Length: ' . $link['file_size']);
if (!jirafeau_is_viewable ($link['mime_type']) || !$cfg['preview'] || $do_download)
    header ('Content-Disposition: attachment; filename="' . $link['file_name'] . '"');
else
    header ('Content-Disposition: filename="' . $link['file_name'] . '"');
header ('Content-Type: ' . $link['mime_type']);
header ('Content-MD5: ' . hex_to_base64($link['md5']));

/* Read encrypted file. */
if ($link['crypted'])
{
    /* Init module */
    $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
    /* Extract key and iv. */
    $md5_key = md5 ($crypt_key);
    $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
    /* Init module. */
    mcrypt_generic_init ($m, $md5_key, $iv);
    /* Decrypt file. */
    $r = fopen (VAR_FILES . $p . $link['md5'], 'r');
    while (!feof ($r))
    {
        $dec = mdecrypt_generic($m, fread ($r, 1024));
        print $dec;
        ob_flush();
    }
    fclose ($r);
    /* Cleanup. */
    mcrypt_generic_deinit($m);
    mcrypt_module_close($m);
}
/* Read file. */
else
{
    $r = fopen (VAR_FILES . $p . $link['md5'], 'r');
    while (!feof ($r))
    {
        print fread ($r, 1024);
        ob_flush();
    }
    fclose ($r);
}

if ($link['onetime'] == 'O')
    jirafeau_delete_link ($link_name);
exit;

?>