Brian Smith 614353c46e Implement ECDH agreement in Rust. ...

This unfortunately required a lot of refactoring. The inversion mod q
is now implemented with using a constant-time algorithm, unlike before,
but the point multiplications themselves are still using variable-time
implementations on most platforms, like before.

Note that the inversion algorithm is constant-time, but the primitive
operations that it is comprised of might not be fully constant-time
(yet).

2016-06-30 15:26:39 -10:00

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