portal-lib (cargo): A Secure file transfer library, written in Rust. The library utilizes  SPAKE2 for key negotiation over an insecure channel, and ChaCha20Poly1305  Authenticated Encryption to encrypt the file with the derived shared symmetric key. This enables two peers to transfer a file over any channel without needing to trust the intermediary relay. 
Keywords: spake2|wormhole|poly1305|chacha20|file-transfer|chacha20-poly1305|file-sharing|rust