134 lines
3.9 KiB
Rust
134 lines
3.9 KiB
Rust
use std::fs::{OpenOptions, File, create_dir_all};
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use std::io::Write;
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use std::path::Path;
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use std::pin::Pin;
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use std::str::FromStr;
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use std::sync::Arc;
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use chrono::Utc;
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use futures::FutureExt;
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use log::info;
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use russh::server::{Auth, Session};
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use russh::*;
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#[tokio::main]
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async fn main() {
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env_logger::builder()
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.filter_level(log::LevelFilter::Info)
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.init();
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let listen_addr = std::env::args().skip(1).next()
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.expect("Expecting <addr:port>");
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let mut config = russh::server::Config::default();
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config.connection_timeout = Some(std::time::Duration::from_secs(10000));
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config.auth_rejection_time = std::time::Duration::from_secs(1);
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config.keys.push(russh_keys::key::KeyPair::generate_ed25519().unwrap());
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let config = Arc::new(config);
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let sh = Server;
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russh::server::run(
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config,
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&std::net::SocketAddr::from_str(&listen_addr).unwrap(),
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sh,
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)
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.await
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.unwrap();
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}
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struct Server;
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impl server::Server for Server {
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type Handler = Handler;
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fn new_client(&mut self, addr: Option<std::net::SocketAddr>) -> Handler {
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let addr = if let Some(addr) = addr {
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format!("{}", addr)
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} else {
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format!("unknown")
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};
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info!("Connection from {}", addr);
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let path = &format!(
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"{}-{}.txt",
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Utc::now().format("%Y-%m-%d/%H:%M:%S"),
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addr
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);
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let path = Path::new(path);
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create_dir_all(path.parent().unwrap()).unwrap();
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let file = OpenOptions::new()
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.create(true)
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.append(true)
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.open(path)
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.unwrap();
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Handler {
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file,
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user: "root".into(),
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}
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}
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}
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fn send_str(session: &mut Session, channel: ChannelId, s: String) {
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let data = CryptoVec::from(s);
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session.data(channel, data);
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}
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struct Handler {
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file: File,
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user: String,
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}
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impl Handler {
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fn send_prompt(&self, session: &mut Session, channel: ChannelId) {
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send_str(session, channel, format!("{}@fnordister:~$ ", self.user));
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}
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}
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impl server::Handler for Handler {
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type Error = anyhow::Error;
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type FutureAuth =
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Pin<Box<dyn core::future::Future<Output = anyhow::Result<(Self, Auth)>> + Send>>;
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type FutureUnit =
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Pin<Box<dyn core::future::Future<Output = anyhow::Result<(Self, Session)>> + Send>>;
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type FutureBool =
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Pin<Box<dyn core::future::Future<Output = anyhow::Result<(Self, Session, bool)>> + Send>>;
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fn finished_auth(self, auth: Auth) -> Self::FutureAuth {
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async { Ok((self, auth)) }.boxed()
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}
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fn finished_bool(self, b: bool, s: Session) -> Self::FutureBool {
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async move { Ok((self, s, b)) }.boxed()
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}
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fn finished(self, s: Session) -> Self::FutureUnit {
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async { Ok((self, s)) }.boxed()
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}
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fn shell_request(self, channel: ChannelId, mut session: Session) -> Self::FutureUnit {
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send_str(&mut session, channel, format!("#\r\n# DEMONSTRATION SYSTEM\r\n#\r\n# All input will be published\r\n#\r\n\r\n"));
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self.send_prompt(&mut session, channel);
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self.finished(session)
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}
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fn auth_password(mut self, user: &str, password: &str) -> Self::FutureAuth {
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writeln!(self.file, "Authenticaed as {} with {}\n", user, password)
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.unwrap();
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self.user = user.into();
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self.finished_auth(server::Auth::Accept)
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}
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fn data(mut self, channel: ChannelId, data: &[u8], mut session: Session) -> Self::FutureUnit {
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self.file.write(data)
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.unwrap();
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// echo input back
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session.data(channel, data.to_vec().into());
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// pressed return?
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if data.contains(&b'\r') {
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writeln!(self.file).unwrap();
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session.data(channel, b"\n".to_vec().into());
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self.send_prompt(&mut session, channel);
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}
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self.finished(session)
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}
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}
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