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wow-btc-swap/swap/src/torut_ext.rs

122 lines
3.9 KiB

use std::borrow::Cow;
use std::future::Future;
use std::net::{IpAddr, Ipv4Addr, SocketAddr};
use std::num::ParseIntError;
use std::{io, iter};
use torut::control::{AsyncEvent, AuthenticatedConn, TorAuthData, UnauthenticatedConn};
use torut::onion::TorSecretKeyV3;
pub type AsyncEventHandler =
fn(
AsyncEvent<'_>,
) -> Box<dyn Future<Output = Result<(), torut::control::ConnError>> + Unpin + Send>;
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("Failed to connect to Tor control port")]
FailedToConnect(#[source] io::Error),
#[error("Failed to read Tor auth-cookie filed")]
FailedToReadCookieFile(#[source] io::Error),
#[error("No authentication information could be found")]
NoAuthData,
#[error("Failed to communicate with Tor control port")]
Connection(torut::control::ConnError),
#[error("Failed to add hidden service")]
FailedToAddHiddenService(torut::control::ConnError),
#[error("Failed to parse port")]
FailedToParsePort(#[from] ParseIntError),
}
// TODO: Use #[from] once available: https://github.com/teawithsand/torut/issues/12
impl From<torut::control::ConnError> for Error {
fn from(e: torut::control::ConnError) -> Self {
Error::Connection(e)
}
}
#[async_trait::async_trait]
pub trait AuthenticatedConnectionExt: Sized {
async fn new(control_port: u16) -> Result<Self, Error>;
async fn with_password(control_port: u16, password: &str) -> Result<Self, Error>;
async fn add_ephemeral_service(
&mut self,
key: &TorSecretKeyV3,
onion_port: u16,
local_port: u16,
) -> Result<(), Error>;
async fn get_socks_port(&mut self) -> Result<u16, Error>;
}
#[async_trait::async_trait]
impl AuthenticatedConnectionExt for AuthenticatedConn<tokio::net::TcpStream, AsyncEventHandler> {
async fn new(control_port: u16) -> Result<Self, Error> {
let stream = tokio::net::TcpStream::connect(format!("127.0.0.1:{}", control_port))
.await
.map_err(Error::FailedToConnect)?;
let mut uac = UnauthenticatedConn::new(stream);
let tor_info = uac.load_protocol_info().await?;
let tor_auth_data = tor_info
.make_auth_data()
.map_err(Error::FailedToReadCookieFile)?
.ok_or(Error::NoAuthData)?;
uac.authenticate(&tor_auth_data).await?;
Ok(uac.into_authenticated().await)
}
async fn with_password(control_port: u16, password: &str) -> Result<Self, Error> {
let stream = tokio::net::TcpStream::connect(format!("127.0.0.1:{}", control_port))
.await
.map_err(Error::FailedToConnect)?;
let mut uac = UnauthenticatedConn::new(stream);
uac.authenticate(&TorAuthData::HashedPassword(Cow::Borrowed(password)))
.await?;
Ok(uac.into_authenticated().await)
}
async fn add_ephemeral_service(
&mut self,
key: &TorSecretKeyV3,
onion_port: u16,
local_port: u16,
) -> Result<(), Error> {
tracing::debug!(
"Adding ephemeral service, onion port {}, local port {}",
onion_port,
local_port
);
self.add_onion_v3(
&key,
false,
false,
false,
None,
&mut iter::once(&(
onion_port,
SocketAddr::new(IpAddr::from(Ipv4Addr::new(127, 0, 0, 1)), local_port),
)),
)
.await
.map_err(Error::FailedToAddHiddenService)
}
async fn get_socks_port(&mut self) -> Result<u16, Error> {
const DEFAULT_SOCKS_PORT: u16 = 9050;
let mut vec = self.get_conf("SocksPort").await?;
let first_element = vec
.pop()
.expect("exactly one element because we requested one config option");
let port = first_element.map_or(Ok(DEFAULT_SOCKS_PORT), |port| port.parse())?; // if config is empty, we are listing on the default port
Ok(port)
}
}