Gopaque implements the OPAQUE protocol in Go. OPAQUE is a way to register users with a server without having to send the user's password to the server during registration or authentication. An introduction to OPAQUE (and PAKEs in general) can be found at this article: Let's talk about PAKE. Gopaque uses the Kyber library to implement this pending RFC using elliptic curves.

To install:

go get -u github.com/cretz/gopaque/gopaque

The documentation, API, and examples are in the Godoc.

WARNING: This is a trivial implementation, the author is not a cryptographer, and the code has not been reviewed. Use at your own risk.

Other known OPAQUE implementations:

• https://github.com/frekui/opaque (Go)
• https://github.com/stef/libsphinx (C)