feat: listen both ipv4 and ipv6 by default (#40)

src/tls.rs

@@ -0,0 +1,158 @@
+use core::task::{Context, Poll};
+use futures::ready;
+use hyper::server::accept::Accept;
+use hyper::server::conn::{AddrIncoming, AddrStream};
+use rustls::{Certificate, PrivateKey};
+use std::future::Future;
+use std::net::SocketAddr;
+use std::pin::Pin;
+use std::sync::Arc;
+use std::{fs, io};
+use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
+use tokio_rustls::rustls::ServerConfig;
+
+enum State {
+    Handshaking(tokio_rustls::Accept<AddrStream>),
+    Streaming(tokio_rustls::server::TlsStream<AddrStream>),
+}
+
+// tokio_rustls::server::TlsStream doesn't expose constructor methods,
+// so we have to TlsAcceptor::accept and handshake to have access to it
+// TlsStream implements AsyncRead/AsyncWrite handshaking tokio_rustls::Accept first
+pub struct TlsStream {
+    state: State,
+    remote_addr: SocketAddr,
+}
+
+impl TlsStream {
+    fn new(stream: AddrStream, config: Arc<ServerConfig>) -> TlsStream {
+        let remote_addr = stream.remote_addr();
+        let accept = tokio_rustls::TlsAcceptor::from(config).accept(stream);
+        TlsStream {
+            state: State::Handshaking(accept),
+            remote_addr,
+        }
+    }
+    pub fn remote_addr(&self) -> SocketAddr {
+        self.remote_addr
+    }
+}
+
+impl AsyncRead for TlsStream {
+    fn poll_read(
+        self: Pin<&mut Self>,
+        cx: &mut Context,
+        buf: &mut ReadBuf,
+    ) -> Poll<io::Result<()>> {
+        let pin = self.get_mut();
+        match pin.state {
+            State::Handshaking(ref mut accept) => match ready!(Pin::new(accept).poll(cx)) {
+                Ok(mut stream) => {
+                    let result = Pin::new(&mut stream).poll_read(cx, buf);
+                    pin.state = State::Streaming(stream);
+                    result
+                }
+                Err(err) => Poll::Ready(Err(err)),
+            },
+            State::Streaming(ref mut stream) => Pin::new(stream).poll_read(cx, buf),
+        }
+    }
+}
+
+impl AsyncWrite for TlsStream {
+    fn poll_write(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &[u8],
+    ) -> Poll<io::Result<usize>> {
+        let pin = self.get_mut();
+        match pin.state {
+            State::Handshaking(ref mut accept) => match ready!(Pin::new(accept).poll(cx)) {
+                Ok(mut stream) => {
+                    let result = Pin::new(&mut stream).poll_write(cx, buf);
+                    pin.state = State::Streaming(stream);
+                    result
+                }
+                Err(err) => Poll::Ready(Err(err)),
+            },
+            State::Streaming(ref mut stream) => Pin::new(stream).poll_write(cx, buf),
+        }
+    }
+
+    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        match self.state {
+            State::Handshaking(_) => Poll::Ready(Ok(())),
+            State::Streaming(ref mut stream) => Pin::new(stream).poll_flush(cx),
+        }
+    }
+
+    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        match self.state {
+            State::Handshaking(_) => Poll::Ready(Ok(())),
+            State::Streaming(ref mut stream) => Pin::new(stream).poll_shutdown(cx),
+        }
+    }
+}
+
+pub struct TlsAcceptor {
+    config: Arc<ServerConfig>,
+    incoming: AddrIncoming,
+}
+
+impl TlsAcceptor {
+    pub fn new(config: Arc<ServerConfig>, incoming: AddrIncoming) -> TlsAcceptor {
+        TlsAcceptor { config, incoming }
+    }
+}
+
+impl Accept for TlsAcceptor {
+    type Conn = TlsStream;
+    type Error = io::Error;
+
+    fn poll_accept(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+    ) -> Poll<Option<Result<Self::Conn, Self::Error>>> {
+        let pin = self.get_mut();
+        match ready!(Pin::new(&mut pin.incoming).poll_accept(cx)) {
+            Some(Ok(sock)) => Poll::Ready(Some(Ok(TlsStream::new(sock, pin.config.clone())))),
+            Some(Err(e)) => Poll::Ready(Some(Err(e))),
+            None => Poll::Ready(None),
+        }
+    }
+}
+
+// Load public certificate from file.
+pub fn load_certs(filename: &str) -> Result<Vec<Certificate>, Box<dyn std::error::Error>> {
+    // Open certificate file.
+    let certfile = fs::File::open(&filename)
+        .map_err(|e| format!("Failed to access `{}`, {}", &filename, e))?;
+    let mut reader = io::BufReader::new(certfile);
+
+    // Load and return certificate.
+    let certs = rustls_pemfile::certs(&mut reader).map_err(|_| "Failed to load certificate")?;
+    if certs.is_empty() {
+        return Err("No supported certificate in file".into());
+    }
+    Ok(certs.into_iter().map(Certificate).collect())
+}
+
+// Load private key from file.
+pub fn load_private_key(filename: &str) -> Result<PrivateKey, Box<dyn std::error::Error>> {
+    // Open keyfile.
+    let keyfile = fs::File::open(&filename)
+        .map_err(|e| format!("Failed to access `{}`, {}", &filename, e))?;
+    let mut reader = io::BufReader::new(keyfile);
+
+    // Load and return a single private key.
+    let keys = rustls_pemfile::read_all(&mut reader)
+        .map_err(|e| format!("There was a problem with reading private key: {:?}", e))?
+        .into_iter()
+        .find_map(|item| match item {
+            rustls_pemfile::Item::RSAKey(key) | rustls_pemfile::Item::PKCS8Key(key) => Some(key),
+            _ => None,
+        })
+        .ok_or("No supported private key in file")?;
+
+    Ok(PrivateKey(keys))
+}