[Swan-dev] code smell

[D. Hugh Redelmeier]

(This isn't a term that rolls off my tongue, but it is a term of art.)

There is a big chunk of code that is almost identical in 
encrypt_v2SK_payload and ikev2_verify_and_decrypt_sk_payload.

It would be good if this code be shared (likely in a function).

This would mean that whenever a change is needed, it will only be needed 
one place.  For example, I've just fixed a bug that appeared in each.  If 
they used common code, this would have been just one bug.  This isn't the 
first pair of bugs that I fixed in this code.

I don't have the time to find the extent of the duplication, but it 
includes at least the last IF in each function.

The duplication itself isn't a bug but it is something to be avoided.  
That's what the term "smell" so crudely suggests.

Where something "smells" in a piece of code, there is often more than one 
thing wrong.