x25519-termux

https://github.com/tpcowan/x25519

An efficient public key cryptography library for Ruby providing key exchange/agreement via the X25519 (a.k.a. Curve25519) Elliptic Curve Diffie-Hellman function as described in RFC 7748. Forked branch of crypto-rb/x25519 modified to work on termux or other platforms where compiling the precomputed C extension fails.