Static ECDH is of interest to us as developers because it's a generic
scalar multiplication (as opposed to using the standard base point) and
it's useful to have that handy.
For reference the other operations of interest to developers are:
- multiplication of the conventional base point: ECDSA signing is almost
exactly that (just a few field ops on top, notably 1 inversion);
- linear combination: ECDSA verification is almost exactly that too.
Including ephemeral as well, because it's hopefully what's of interest
to most users.
Compared to the previous version, include only one side of the
operations. I don't think including both sides is of interest to anyone.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
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