if err != nil {
		return nil, err
	}
	h = h[4:] // strip four byte prefix

	var paddingLen int
	if inner.serverName != "" {
		paddingLen = max(0, maxNameLength-len(inner.serverName))
	} else {
		paddingLen = maxNameLength + 9
	}
	paddingLen = 31 - ((len(h) + paddingLen - 1) % 32)

	return append(h, make([]byte, paddingLen)...), nil
}