Curve25519

Links related to the Nxt curve25519 implementation

Take a look at this discussion thread https://nxtforum.org/general/curve22519-in-c

It suggests that the original code can be found here https://github.com/swdunlop/WaspVM/blob/master/vm/curve25519_i64.c

In addition, user mystcoin has ported the Java code back to C here https://bitbucket.org/mystcoin/curve22519/src use your best judgement when selecting which version to use.

There is also this review of the Nxt curve25519 implementation: https://gist.github.com/doctorevil/9521116 and an alternative Python implementation for test purposes https://gist.github.com/doctorevil/9521126