I am trying to initiate an order on the Sage Pay servers using VPSProtocol 3.00. I am having problems encrypting the NVP data to generate the "Crypt" field.
When I submit the details to the Sage Pay servers it says "3045 : The Currency field is missing.".
I know my encrypted NVPs are all correct including the currency field. If I change the encryption key to something wrong I get the same error which leads me to believe it's an encryption problem.
Here's the code I am using...
class sagepay{
/**
* My Encryption Key
*/
const encryptionKey = 'MY-ENCRYPTION-KEY';
/**
* Encryption Function.
* @param string $data NVP Data to be encrypted.
* @return string Encrypted Data.
*/
public static function doEncrypt($data){
$strCrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, self::encryptionKey, self::_pkcs5_pad($data), MCRYPT_MODE_CBC, self::encryptionKey);
return "@".bin2hex($strCrypt);
}
/**
* Pad Data
* @param string $text NVP Data being encrypted.
* @return string Padded Data.
*/
private static function _pkcs5_pad($text){
$blocksize = mcrypt_get_block_size('des', 'cbc');
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
}
Thanks.