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|
use tokio::io::{AsyncBufReadExt as _, AsyncWriteExt as _};
use tokio::stream::StreamExt as _;
fn make_socket() -> anyhow::Result<tokio::net::UnixListener> {
let runtime_dir = rbw::dirs::runtime_dir();
std::fs::create_dir_all(&runtime_dir)?;
let path = runtime_dir.join("socket");
std::fs::remove_file(&path)?;
let sock = tokio::net::UnixListener::bind(&path)?;
log::debug!("listening on socket {}", path.to_string_lossy());
Ok(sock)
}
async fn send_response(
sock: &mut tokio::net::UnixStream,
res: &rbw::agent::Response,
) {
sock.write_all(serde_json::to_string(res).unwrap().as_bytes())
.await
.unwrap();
sock.write_all(b"\n").await.unwrap();
}
async fn ensure_login(
sock: &mut tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
) {
let rstate = state.read().await;
if rstate.access_token.is_none() {
login(sock, state.clone(), None).await; // tty
}
}
async fn login(
sock: &mut tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
tty: Option<&str>,
) {
let mut state = state.write().await;
let email = "bitwarden@tozt.net"; // XXX read from config
let password =
rbw::pinentry::getpin("prompt", "desc", tty).await.unwrap();
let (access_token, iterations, protected_key) =
rbw::actions::login(email, &password).await.unwrap();
state.access_token = Some(access_token);
state.iterations = Some(iterations);
let keys =
rbw::actions::unlock(email, &password, iterations, protected_key)
.await
.unwrap();
state.priv_key = Some(keys);
send_response(sock, &rbw::agent::Response::Ack).await;
}
async fn ensure_unlock(
sock: &mut tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
) {
let rstate = state.read().await;
if rstate.priv_key.is_none() {
unlock(sock, state.clone(), None).await; // tty
}
}
async fn unlock(
sock: &mut tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
tty: Option<&str>,
) {
let mut state = state.write().await;
let email = "bitwarden@tozt.net"; // XXX read from config
let password =
rbw::pinentry::getpin("prompt", "desc", tty).await.unwrap();
let keys = rbw::actions::unlock(
email,
&password,
state.iterations.unwrap(),
state.protected_key.as_ref().unwrap().to_string(),
)
.await
.unwrap();
state.priv_key = Some(keys);
send_response(sock, &rbw::agent::Response::Ack).await;
}
async fn sync(
sock: &mut tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
) {
ensure_login(sock, state.clone()).await;
let mut state = state.write().await;
let (protected_key, ciphers) =
rbw::actions::sync(state.access_token.as_ref().unwrap())
.await
.unwrap();
state.protected_key = Some(protected_key);
println!("{}", serde_json::to_string(&ciphers).unwrap());
state.ciphers = ciphers;
send_response(sock, &rbw::agent::Response::Ack).await;
}
async fn decrypt(
sock: &mut tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
cipherstring: &str,
) {
ensure_unlock(sock, state.clone()).await;
let state = state.read().await;
let keys = state.priv_key.as_ref().unwrap();
let cipherstring =
rbw::cipherstring::CipherString::new(cipherstring).unwrap();
let plaintext =
String::from_utf8(cipherstring.decrypt(keys).unwrap()).unwrap();
send_response(sock, &rbw::agent::Response::Decrypt { plaintext }).await;
}
async fn handle_sock(
sock: tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
) {
let mut buf = tokio::io::BufStream::new(sock);
let mut line = String::new();
buf.read_line(&mut line).await.unwrap();
let mut sock = buf.into_inner();
let msg: rbw::agent::Request = serde_json::from_str(&line).unwrap();
match msg.action {
rbw::agent::Action::Login => {
login(&mut sock, state.clone(), msg.tty.as_deref()).await
}
rbw::agent::Action::Unlock => {
unlock(&mut sock, state.clone(), msg.tty.as_deref()).await
}
rbw::agent::Action::Sync => sync(&mut sock, state.clone()).await,
rbw::agent::Action::Decrypt { cipherstring } => {
decrypt(&mut sock, state.clone(), &cipherstring).await
}
rbw::agent::Action::Quit => std::process::exit(0),
}
}
struct Agent {
timeout: tokio::time::Delay,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
}
struct State {
access_token: Option<String>,
priv_key: Option<rbw::locked::Keys>,
// these should be in a state file
iterations: Option<u32>,
protected_key: Option<String>,
ciphers: Vec<rbw::api::Cipher>,
}
impl Agent {
fn new() -> Self {
Self {
timeout: tokio::time::delay_for(
tokio::time::Duration::from_secs(600), // read from config
),
state: std::sync::Arc::new(tokio::sync::RwLock::new(State {
access_token: None,
iterations: None,
protected_key: None,
priv_key: None,
ciphers: vec![],
})),
}
}
async fn run(&mut self, mut listener: tokio::net::UnixListener) {
loop {
tokio::select! {
sock = listener.next() => {
let state = self.state.clone();
tokio::spawn(async move {
handle_sock(sock.unwrap().unwrap(), state).await
});
}
_ = &mut self.timeout => {
break;
}
}
}
}
}
fn main() {
env_logger::from_env(
env_logger::Env::default().default_filter_or("info"),
)
.init();
let runtime_dir = rbw::dirs::runtime_dir();
std::fs::create_dir_all(&runtime_dir).unwrap();
let (r, w) = nix::unistd::pipe().unwrap();
let res = daemonize::Daemonize::new()
.pid_file(runtime_dir.join("pidfile"))
.exit_action(move || {
nix::unistd::close(w).unwrap();
let mut buf = [0; 1];
nix::unistd::read(r, &mut buf).unwrap();
nix::unistd::close(r).unwrap();
})
.start();
nix::unistd::close(r).unwrap();
match res {
Ok(_) => (),
Err(e) => {
match e {
daemonize::DaemonizeError::LockPidfile(_) => {
// this means that there is already an agent running, so
// return a special exit code to allow the cli to detect
// this case and not error out
std::process::exit(23);
}
_ => panic!("failed to daemonize: {}", e),
}
}
}
tokio::runtime::Runtime::new().unwrap().block_on(async {
let listener = make_socket();
nix::unistd::write(w, &[0]).unwrap();
nix::unistd::close(w).unwrap();
let mut agent = Agent::new();
agent.run(listener.unwrap()).await;
})
}
|
