datadiode network driver

loose thoughts

based on ethernet or lwl
primarily to exchange data between virtualized hosts
implements a driver which
1. trust on unbound channel
2. established a secure data transfer
3. PSK as param, maximum receive size
4. basically unicast , optionally simplex data + simplex status code(compile time)
5. bpf based state machine firewall + logging
6. inotify interrupt
7. optional: steganographically resilient for timing attacks
implements userland interface
1. authenticate remote communication point
2. transfer file, not files
3. transfer text
use well known security concepts
- ECC based asymmetric encryption + symmetric transfers
- maybe hardware token based signing
technology combining of
- wireguard -> the light driver + encryption
- syncthing -> UI handling of sharing files
- warpinator -> idea of sharing files
- snapdrop/Airdrop
- age encryption
benefits
- one piece of software for one specific job
- implementing a specific feature by design not by enforcing outer boundaries
json based transfer format
- version
- type of content [0:text, 1:file]
- size of content [int64]
- encrypted content [2^48]