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use std::future::Future; use std::io::{self, Read, Write}; use std::pin::Pin; use std::task::{Context, Poll}; use futures_io_traits_sync_wrapper::Wrapper as AsyncRWSyncWrapper; use futures_util::io::{AsyncRead, AsyncWrite}; use rustls::{Session, Stream}; #[cfg(feature = "acceptor")] mod acceptor; #[cfg(feature = "acceptor")] pub use acceptor::TlsAcceptor; #[cfg(feature = "connector")] mod connector; #[cfg(feature = "connector")] pub use connector::TlsConnector; pub mod prelude { pub use rustls::{ internal::pemfile, ClientConfig, ClientSession, NoClientAuth, ServerConfig, ServerSession, Session as RustlsSession, }; #[cfg(feature = "connector")] pub use webpki::DNSNameRef; #[cfg(feature = "connector")] pub use webpki_roots::TLS_SERVER_ROOTS; } pub struct TlsStream<S, IO> { session: S, io: Box<IO>, } impl<S, IO> TlsStream<S, IO> { pub fn get_mut(&mut self) -> (&mut S, &mut IO) { (&mut self.session, self.io.as_mut()) } pub fn get_ref(&self) -> (&S, &IO) { (&self.session, self.io.as_ref()) } pub fn into_inner(self) -> (S, IO) { (self.session, *self.io) } } pub async fn handshake<S, IO>(session: S, io: IO) -> io::Result<TlsStream<S, IO>> where S: Session + Unpin, IO: AsyncRead + AsyncWrite + Unpin, { Handshake(Some((session, io))).await } struct Handshake<S, IO>(Option<(S, IO)>); impl<S, IO> Future for Handshake<S, IO> where S: Session + Unpin, IO: AsyncRead + AsyncWrite + Unpin, { type Output = io::Result<TlsStream<S, IO>>; fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> { let this = self.get_mut(); let (mut session, mut stream) = this.0.take().expect("never"); let mut io = AsyncRWSyncWrapper::new(&mut stream, cx); match session.complete_io(&mut io) { Ok(_) => Poll::Ready(Ok(TlsStream { session, io: Box::new(stream), })), Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => { this.0 = Some((session, stream)); Poll::Pending } Err(err) => Poll::Ready(Err(err)), } } } impl<S, IO> AsyncRead for TlsStream<S, IO> where S: Session + Unpin, IO: AsyncRead + AsyncWrite + Unpin, { fn poll_read( self: Pin<&mut Self>, cx: &mut Context, buf: &mut [u8], ) -> Poll<io::Result<usize>> { let this = self.get_mut(); let mut io = AsyncRWSyncWrapper::new(&mut this.io, cx); let mut stream = Stream::new(&mut this.session, &mut io); match stream.read(buf) { Ok(n) => Poll::Ready(Ok(n)), Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => Poll::Pending, Err(err) => Poll::Ready(Err(err)), } } } impl<S, IO> AsyncWrite for TlsStream<S, IO> where S: Session + Unpin, IO: AsyncRead + AsyncWrite + Unpin, { fn poll_write(self: Pin<&mut Self>, cx: &mut Context, buf: &[u8]) -> Poll<io::Result<usize>> { let this = self.get_mut(); let mut io = AsyncRWSyncWrapper::new(&mut this.io, cx); let mut stream = Stream::new(&mut this.session, &mut io); match stream.write(buf) { Ok(n) => Poll::Ready(Ok(n)), Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => Poll::Pending, Err(err) => Poll::Ready(Err(err)), } } fn poll_flush(self: Pin<&mut Self>, cx: &mut Context) -> Poll<io::Result<()>> { let this = self.get_mut(); let mut io = AsyncRWSyncWrapper::new(&mut this.io, cx); let mut stream = Stream::new(&mut this.session, &mut io); stream.flush()?; Pin::new(&mut this.io).poll_flush(cx) } fn poll_close(self: Pin<&mut Self>, cx: &mut Context) -> Poll<io::Result<()>> { let this = self.get_mut(); Pin::new(&mut this.io).poll_close(cx) } }