rust-croc is the rust-made equivilant to croc, A tool that allows any two computers to simply and securely transfer files and folders. AFAIK, croc is the only CLI file-transfer tool that does all of the following:

This is a very early WIP, to start just type:

RUST_BACKTRACE=1 RUST_LOG=trace cargo run --release

• allows any two computers to transfer data (using a relay)
• provides end-to-end encryption (using PAKE)
• enables easy cross-platform transfers (Windows, Linux, Mac)
• allows multiple file transfers
• allows resuming transfers that are interrupted
• local server or port-forwarding not needed
• ipv6-first with ipv4 fallback

For more information about croc, see Zack schollz's blog post.