<?php
function hash_part($fp,$start,$length) {
	$ctx = hash_init('md5');

	$remaining=$length;
	$chunkSize=65536;
	while ($remaining > 0) {
		$read = hash_update_stream($ctx, $fp, min($chunkSize, $remaining));
		//echo "$read\n";
		$remaining -= $read;
		//printf("\r%04.1f%%",(1-$remaining/$length)*100);
	}
	//echo "\n";
	return hash_final($ctx);
}
$fp = fopen('sl-x86-3.4.loop1-to-3.4.loop2b.xd3','rb');
$hash = hash_part($fp,0,40*1024*1024);
echo "$hash\n";
if ($hash != "40d99ed59fba1844207283d25f833c35") {
	echo "WHAT THE HELL IS GOING ON\n";
}
fclose($fp);
?>
Output:
> for /L %i in (1,1,10) do @php recover.php
40d99ed59fba1844207283d25f833c35
40d99ed59fba1844207283d25f833c35
40d99ed59fba1844207283d25f833c35
40d99ed59fba1844207283d25f833c35
40d99ed59fba1844207283d25f833c35
40d99ed59fba1844207283d25f833c35
553302d5d7f3a423338067eb4d4d3ec9
WHAT THE HELL IS GOING ON
40d99ed59fba1844207283d25f833c35
40d99ed59fba1844207283d25f833c35
831e04ff036bf6f76ec8d4bc262de8bf
WHAT THE HELL IS GOING ON

>