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);
} else {
$r = fopen(VAR_FILES . $p . $link['md5'], 'r');
/**
* Decrypt file.
* @param $fp_src file path to the file to decrypt.
* @param $fp_dst file path to the file to write decrypted file (could be the same).
* @param $k string composed of the key and the iv separated by a point ('.')
* @return key used to decrypt. a string of length 0 is returned if failed.
*/
function jirafeau_decrypt_file($fp_src, $fp_dst, $k)
{
$fs = filesize($fp_src);
if ($fs === false || $fs == 0 || !(extension_loaded('mcrypt') == true)) {
return false;
}
/* Init module */
$m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
/* Extract key and iv. */
$crypt_key = $k;
$md5_key = md5($crypt_key);
$iv = jirafeau_crypt_create_iv($md5_key, mcrypt_enc_get_iv_size($m));
/* Decrypt file. */
$r = fopen($fp_src, 'r');
$w = fopen($fp_dst, 'c');
while (!feof($r)) {
$dec = mdecrypt_generic($m, fread($r, 1024));
if (fwrite($w, $dec) === false) {
return false;
}
}
fclose($r);
fclose($w);
/* Cleanup. */
mcrypt_generic_deinit($m);
mcrypt_module_close($m);
return true;
}
