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use tokio::io::AsyncBufReadExt 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 ensure_login(state: std::sync::Arc<tokio::sync::RwLock<State>>) {
let rstate = state.read().await;
if rstate.access_token.is_none() {
login(state.clone(), None).await; // tty
}
}
async fn login(
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 (enc_key, mac_key) =
rbw::actions::unlock(email, &password, iterations, protected_key)
.await
.unwrap();
state.priv_key = Some((enc_key, mac_key));
}
async fn ensure_unlock(state: std::sync::Arc<tokio::sync::RwLock<State>>) {
let rstate = state.read().await;
if rstate.priv_key.is_none() {
unlock(state.clone(), None).await; // tty
}
}
async fn unlock(
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 (enc_key, mac_key) = rbw::actions::unlock(
email,
&password,
state.iterations.unwrap(),
state.protected_key.as_ref().unwrap().to_string(),
)
.await
.unwrap();
state.priv_key = Some((enc_key, mac_key));
}
async fn sync(state: std::sync::Arc<tokio::sync::RwLock<State>>) {
ensure_login(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;
}
async fn decrypt(
state: std::sync::Arc<tokio::sync::RwLock<State>>,
cipherstring: &str,
) {
ensure_unlock(state.clone()).await;
let state = state.read().await;
let (enc_key, mac_key) = state.priv_key.as_ref().unwrap();
let cipherstring =
rbw::cipherstring::CipherString::new(cipherstring).unwrap();
let plain = cipherstring.decrypt(&enc_key, &mac_key).unwrap();
println!("{}", String::from_utf8(plain).unwrap());
}
async fn handle_sock(
sock: tokio::net::UnixStream,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
) {
let buf = tokio::io::BufStream::new(sock);
let mut lines = buf.lines();
while let Some(line) = lines.next().await {
let line = line.unwrap();
let msg: rbw::agent::Message = serde_json::from_str(&line).unwrap();
match msg.action {
rbw::agent::Action::Login => {
login(state.clone(), msg.tty.as_deref()).await
}
rbw::agent::Action::Unlock => {
unlock(state.clone(), msg.tty.as_deref()).await
}
rbw::agent::Action::Sync => sync(state.clone()).await,
rbw::agent::Action::Decrypt { cipherstring } => {
decrypt(state.clone(), &cipherstring).await
}
}
}
}
struct Agent {
timeout: tokio::time::Delay,
state: std::sync::Arc<tokio::sync::RwLock<State>>,
}
struct State {
access_token: Option<String>,
priv_key: Option<(Vec<u8>, Vec<u8>)>,
// 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;
})
}
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