function encrypt_get_vars($var)
{
assert(isset($var));
global $_CONFIG;
global $_RUN;
// Generate checksum if not already done so..
if ($_RUN['current_page_checksum'] == NULL) {
$_RUN['current_page_checksum'] = generate_checksum();
}
// Things get real messy when they are not strings (like ints)
$var = (string) $var;
// Mix string with checksum and random chars...
$var = substr($_RUN['current_page_checksum'], 0, 5) . $var . substr($_RUN['current_page_checksum'], 5, 5);
for ($s = "", $i = 0; $i != strlen($var); $i++) {
$s .= chr(rand(0, 255)) . $var[$i];
}
// Encrypt the string
mcrypt_generic_init($_CONFIG['MCRYPT_TD'], $_CONFIG['MCRYPT_KEY'], $_CONFIG['MCRYPT_IV']);
$s = mcrypt_generic($_CONFIG['MCRYPT_TD'], $s);
// Encode it Bas64 (YUK!)
for ($i = 0; $i != 1; $i++) {
$s = base64_encode($s);
}
// And return it in a html-friendly way
return rawurlencode($s);
}
function DecodeRegistrationKey($serial_number, $registration_key)
{
if (strlen($serial_number) == 0 || strlen($registration_key) == 0) {
return false;
}
$key = $registration_key;
$key = str_replace('-', '', $key);
$key = str_replace(' ', '', $key);
$key = strtoupper($key);
// get the checksum from the key. It will be the last char of the key
$checksumFromKey = ord($key[strlen($key) - 1]) - ASCII_BIG_A;
$key = substr($key, 0, strlen($key) - 1);
// store off this key so we can compare checksum later
$keyToCompareChecksumTo = $key;
list($key, $version) = ExtractFromByteArray($key, false);
list($key, $product) = ExtractFromByteArray($key, false);
if ($version == -1 || $product == -1) {
return false;
}
// decode the rest of the key
$arr = DecodeHolodeckBasicKey($key);
if (!$arr) {
return false;
}
$data = $arr[0];
$key = $arr[1];
$data->productType = $product;
$data->keyVersion = $version;
$data->serialNumber = $serial_number;
$data->registrationKey = $registration_key;
//make sure that what is left of the key matches the serial number encoding
$computedSerialNumber = GenerateSerialNumberByteArray($data->serialNumber);
if ($computedSerialNumber != $key) {
return false;
}
// check the original checksum with the computed checksum to make sure it is valid
$computedChecksum = generate_checksum($keyToCompareChecksumTo);
if ($computedChecksum != $checksumFromKey) {
return false;
}
return $data;
}
