Re: Misalignment, MIPS, and ip_hdr(skb)->version

From: Andrew Lunn
Date: Sun Dec 11 2016 - 10:30:51 EST

> 3. Add 3 bytes of padding, set to zero, to the encrypted section just
> before the IP header, marked for future use.
> Pros: satisfies IETF mantras, can use those extra bits in the future
> for interesting protocol extensions for authenticated peers.
> Cons: lowers MTU, marginally more difficult to implement but still
> probably just one or two lines of code.

I'm not a crypto expert, but does this not give you a helping hand in
breaking the crypto? You know the plain text value of these bytes, and
where they are in the encrypted text.