Barton encrypt/decrypt

function pay_encrypt($json_data, $key, $iv)
{

    $encryption_key = base64_decode($key);
    $iv_orig = base64_decode($iv);
    $sdata = serialize($json_data);
    $encrypted = openssl_encrypt($sdata, 'aes-256-cbc', $encryption_key, 0, $iv_orig);

    return strtr($encrypted, '+/=', '._-');
}


function pay_decrypt($data, $key, $iv)
{

    $encryption_key = base64_decode($key);
    $iv_orig = base64_decode($iv);
    $data_unsanitized = strtr($data, '._-', '+/=');

    return unserialize(openssl_decrypt($data_unsanitized, 'aes-256-cbc', $encryption_key, 0, $iv_orig));
}