Osteria 0.09 — secure point-to-point messenger

This project offers an example code in fields of network programming using Berkeley sockets, GUI programming using GTK+ and applied cryptography programming using TweetNaCl. Licence: BSD 2-clause with public domain parts.

Features

• direct point-to-point connection of two users via global or local network
• all user messages are protected by strong cryptographic functions written by well-known professionals
• perfect forward secrecy property of conversations
• protocol allows protection against man-in-the-middle attack by comparsion of hashes of keys and/or by master key exchange via secure channel (e.g. via USB flash drives on offline meeting), against replay attack and partially against concealment of messages
• handy and simple GUI
• supports both IPv4 and IPv6

Platform

• GNU/Linux (tested)
• other *nix and Windows (not tested; porting should be easy because code for that platforms is already included in sources)

Dependencies

GTK+ >= 3.10

On *nix it means libgtk-3-0 libgtk-3-bin libgtk-3-common libgtk-3-dev packages.

Posts about it in Russian

1. О выборе криптографической библиотеки.
2. О разработанном криптографическом протоколе.

Todo

• file sending is just a must-have feature

Contributors

Developer: Zuboff Ivan // anotherdiskmag on gooooooogle mail

Testing, ideas: Yelmanov Andrew, Danilenko Egor