static function Hash($data, $rounds, $mintime)
{
$data = (string) $data;
if ($data == "") {
return array("success" => false, "error" => "No data.");
}
// Expand data.
$origdata = $data;
while (strlen($data) < 56) {
$data .= $origdata;
}
$maxpos = strlen($data);
$data .= $data;
// Run through Blowfish.
$result = "";
for ($x = 0; $x < 32; $x++) {
$result .= chr($x);
}
$x = 0;
$ts = microtime(true) + $mintime / 1000;
$totalrounds = 0;
if (self::IsMcryptAvailable()) {
$mp = mcrypt_module_open(MCRYPT_BLOWFISH, "", MCRYPT_MODE_ECB, "");
$iv = str_repeat("", mcrypt_enc_get_iv_size($mp));
if (mcrypt_enc_get_key_size($mp) != 56) {
return array("success" => false, "error" => "Unexpected response from PHP function.");
}
while ($rounds > 0) {
$key = substr($data, $x, 56);
$x = ($x + 56) % $maxpos;
mcrypt_generic_init($mp, $key, $iv);
$result = mcrypt_generic($mp, $result);
mcrypt_generic_deinit($mp);
$result = substr($result, -1) . substr($result, 0, -1);
$rounds--;
$totalrounds++;
if (!$rounds && $mintime > 0 && microtime(true) < $ts) {
$rounds++;
}
}
mcrypt_module_close($mp);
} else {
$numbits = 56 * 8;
$bf = new Blowfish();
while ($rounds > 0) {
$key = substr($data, $x, 56);
$x = ($x + 56) % $maxpos;
$bf->SetKey($key, $numbits);
$bf->AddData($result);
$bf->Finalize();
$result = $bf->Encrypt();
$result = substr($result, -1) . substr($result, 0, -1);
$rounds--;
$totalrounds++;
if (!$rounds && $mintime > 0 && microtime(true) < $ts) {
$rounds++;
}
}
}
return array("success" => true, "hash" => $result, "rounds" => $totalrounds);
}
