airio_identify/
lib.rs

1use std::{
2    io, iter,
3    pin::Pin,
4    task::{Context, Poll},
5};
6
7use airio_core::{PeerId, Upgrade, UpgradeInfo};
8use ed25519_dalek::PUBLIC_KEY_LENGTH;
9use ed25519_dalek::{SignatureError, VerifyingKey};
10use futures::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, future::BoxFuture};
11
12pub use ed25519_dalek as ed25519;
13
14#[derive(Clone)]
15pub struct Config {
16    local_pubkey: VerifyingKey,
17}
18
19impl Config {
20    pub fn new(local_pubkey: VerifyingKey) -> Self {
21        Self { local_pubkey }
22    }
23
24    async fn handshake<T>(self, mut socket: T) -> Result<(PeerId, IdentifyConnection<T>), Error>
25    where
26        T: AsyncRead + AsyncWrite + Send + Unpin + 'static,
27    {
28        socket.write_all(self.local_pubkey.as_bytes()).await?;
29        socket.flush().await?;
30        let mut key_buf = [0; PUBLIC_KEY_LENGTH];
31        socket.read_exact(&mut key_buf).await?;
32        let remote_key = VerifyingKey::from_bytes(&key_buf)?;
33        let peer_id = PeerId::from_bytes(remote_key.as_bytes().clone());
34        Ok((peer_id, IdentifyConnection { socket, remote_key }))
35    }
36}
37
38impl UpgradeInfo for Config {
39    type Info = &'static str;
40    type InfoIter = iter::Once<Self::Info>;
41
42    fn protocol_info(&self) -> Self::InfoIter {
43        iter::once("/v1/identify")
44    }
45}
46
47impl<C> Upgrade<C> for Config
48where
49    C: AsyncRead + AsyncWrite + Send + Unpin + 'static,
50{
51    type Output = (PeerId, IdentifyConnection<C>);
52    type Error = Error;
53    type Future = BoxFuture<'static, Result<Self::Output, Self::Error>>;
54
55    fn upgrade_inbound(self, socket: C, _: Self::Info) -> Self::Future {
56        Box::pin(self.handshake(socket))
57    }
58
59    fn upgrade_outbound(self, socket: C, _: Self::Info) -> Self::Future {
60        Box::pin(self.handshake(socket))
61    }
62}
63
64pub struct IdentifyConnection<S>
65where
66    S: AsyncRead + AsyncWrite + Unpin,
67{
68    pub socket: S,
69    pub remote_key: VerifyingKey,
70}
71
72#[derive(Debug, thiserror::Error)]
73pub enum Error {
74    #[error("I/O error: {0}")]
75    Io(#[from] io::Error),
76    #[error(transparent)]
77    SignatureError(#[from] SignatureError),
78}
79
80impl<T> AsyncRead for IdentifyConnection<T>
81where
82    T: AsyncRead + AsyncWrite + Unpin,
83{
84    fn poll_read(
85        self: Pin<&mut Self>,
86        cx: &mut Context<'_>,
87        buf: &mut [u8],
88    ) -> Poll<io::Result<usize>> {
89        Pin::new(&mut self.get_mut().socket).poll_read(cx, buf)
90    }
91
92    fn poll_read_vectored(
93        self: Pin<&mut Self>,
94        cx: &mut Context<'_>,
95        bufs: &mut [io::IoSliceMut<'_>],
96    ) -> Poll<io::Result<usize>> {
97        Pin::new(&mut self.get_mut().socket).poll_read_vectored(cx, bufs)
98    }
99}
100
101impl<T> AsyncWrite for IdentifyConnection<T>
102where
103    T: AsyncRead + AsyncWrite + Unpin,
104{
105    fn poll_write(
106        self: Pin<&mut Self>,
107        cx: &mut Context<'_>,
108        buf: &[u8],
109    ) -> Poll<Result<usize, io::Error>> {
110        Pin::new(&mut self.get_mut().socket).poll_write(cx, buf)
111    }
112
113    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
114        Pin::new(&mut self.get_mut().socket).poll_flush(cx)
115    }
116
117    fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
118        Pin::new(&mut self.get_mut().socket).poll_close(cx)
119    }
120}
airio_identify/lib.rs

airio_identify/
lib.rs
