Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Instead we should use the standard OpenSSL constant time routines.
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

We already have a constant_time_select() function so, to avoid
confusion/clashing we shouldn't have a second one.
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Following running openssl-format-source there were a lot of manual tweaks
that were requried.
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Some files talk about the MIT license. This code was contributed under
CLA and was relicensed to the OpenSSL licence when imported.
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)

This imports selected files from the src directory of this repository:

https://sourceforge.net/p/ed448goldilocks/code/ci/v0.9.4/tree/

This is from the version tagged as "v0.9.4" with commit id 7527e9.

This code was originally writting by Mike Hamburg and the import is done by
kind permission of Rambus and Mike Hamburg under CLA. As this is under CLA
the files are being relicensed under the OpenSSL licence. Subsequent
commits will correct any licence notices in the individual files.

These files should provide complete self-contained support for X448 and
Ed448. They are imported "as is" from the source repository and this
commit does not attempt to integrate them into the OpenSSL build system,
or modify them in any way to fit OpenSSL style guidelines. That will be
done by subsequent commits.
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/5105)