This portable code contributed by the Network and Information Security Group (NISEC) at Tampere University comes from:

[ECCKiila](https://gitlab.com/nisec/ecckiila) that uses [Fiat](https://github.com/mit-plv/fiat-crypto) for the underlying field arithmetic.
Co-authored-by: Luis Rivera-Zamarripa <luis.riverazamarripa@tuni.fi>
Co-authored-by: Jesús-Javier Chi-Domínguez <jesus.chidominguez@tuni.fi>

Differential Revision: https://phabricator.services.mozilla.com/D79267

--HG--
extra : moz-landing-system : lando