Fixes tests when using Go tip. Without this the link steps
fails with errors like:
missing Go type information for global symbol: google3/third_party/golang/go_crypto/curve25519/curve25519.REDMASK51 size 8
LGTM=agl
R=agl
CC=golang-codereviews
https://golang.org/cl/156810043
Previously curve25519 contained a constant-time, optimised amd64 implementation and
a generic implemenation that used math/big and that was not constant-time.
This change contains a Go port of the public domain, "ref10" implementation from
SUPERCOP. This has the advantage of being faster and constant-time.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13343045
This consists of ~2000 lines of amd64 assembly and a, much slower,
generic Go version in curve25519.go. The assembly has been ported from
djb's public domain sources and the only semantic alterations are to
deal with Go's split stacks.
R=rsc
CC=golang-dev
https://golang.org/cl/5786045