rust-libp2p/secio/README.md

The secio protocol is a middleware that will encrypt and decrypt communications going through a socket (or anything that implements AsyncRead + AsyncWrite).

Connection upgrade

The SecioConfig struct implements the ConnectionUpgrade trait. You can apply it over a Transport by using the with_upgrade method. The returned object will also implement Transport and will automatically apply the secio protocol over any connection that is opened through it.

extern crate futures;
extern crate tokio_current_thread;
extern crate tokio_io;
extern crate libp2p_core;
extern crate libp2p_secio;
extern crate libp2p_tcp_transport;

use futures::Future;
use libp2p_secio::{SecioConfig, SecioKeyPair};
use libp2p_core::{Multiaddr, Transport};
use libp2p_tcp_transport::TcpConfig;
use tokio_core::reactor::Core;
use tokio_io::io::write_all;

let mut core = Core::new().unwrap();

let transport = TcpConfig::new()
    .with_upgrade({
        # let private_key = b"";
        //let private_key = include_bytes!("test-rsa-private-key.pk8");
        # let public_key = vec![];
        //let public_key = include_bytes!("test-rsa-public-key.der").to_vec();
        SecioConfig {
            // See the documentation of `SecioKeyPair`.
            key: SecioKeyPair::rsa_from_pkcs8(private_key, public_key).unwrap(),
        }
    });

let future = transport.dial("/ip4/127.0.0.1/tcp/12345".parse::<Multiaddr>().unwrap())
    .unwrap_or_else(|_| panic!("Unable to dial node"))
    .and_then(|(connection, _)| {
        // Sends "hello world" on the connection, will be encrypted.
        write_all(connection, "hello world")
    });

tokio_current_thread::block_on_all(future).unwrap();

Manual usage

Note

: You are encouraged to use SecioConfig as described above.

You can add the secio layer over a socket by calling SecioMiddleware::handshake(). This method will perform a handshake with the host, and return a future that corresponds to the moment when the handshake succeeds or errored. On success, the future produces a SecioMiddleware that implements Sink and Stream and can be used to send packets of data.