1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

use std::fmt;
use std::future::Future;
use std::marker::PhantomData;
use std::pin::Pin;
use std::sync::Arc;
use std::task::{Context, Poll};

pub use rust_tls::Session;
pub use crate::secure::{client::TlsStream, rust_tls::ClientConfig};

use crate::krse::io::{AsyncRead, AsyncWrite};
use crate::service::{Service, ServiceFactory};
use futures_util::future::{ok, Ready};
use crate::secure::{Connect, TlsConnector};
use webpki::DNSNameRef;

use crate::connect::{Address, Connection};

/// Rustls connector factory
pub struct RustlsConnector<T, U> {
    connector: Arc<ClientConfig>,
    _t: PhantomData<(T, U)>,
}

impl<T, U> RustlsConnector<T, U> {
    pub fn new(connector: Arc<ClientConfig>) -> Self {
        RustlsConnector {
            connector,
            _t: PhantomData,
        }
    }
}

impl<T, U> RustlsConnector<T, U>
where
    T: Address,
    U: AsyncRead + AsyncWrite + Unpin + fmt::Debug,
{
    pub fn service(connector: Arc<ClientConfig>) -> RustlsConnectorService<T, U> {
        RustlsConnectorService {
            connector: connector,
            _t: PhantomData,
        }
    }
}

impl<T, U> Clone for RustlsConnector<T, U> {
    fn clone(&self) -> Self {
        Self {
            connector: self.connector.clone(),
            _t: PhantomData,
        }
    }
}

impl<T: Address, U> ServiceFactory for RustlsConnector<T, U>
where
    U: AsyncRead + AsyncWrite + Unpin + fmt::Debug,
{
    type Request = Connection<T, U>;
    type Response = Connection<T, TlsStream<U>>;
    type Error = std::io::Error;
    type Config = ();
    type Service = RustlsConnectorService<T, U>;
    type InitError = ();
    type Future = Ready<Result<Self::Service, Self::InitError>>;

    fn new_service(&self, _: ()) -> Self::Future {
        ok(RustlsConnectorService {
            connector: self.connector.clone(),
            _t: PhantomData,
        })
    }
}

pub struct RustlsConnectorService<T, U> {
    connector: Arc<ClientConfig>,
    _t: PhantomData<(T, U)>,
}

impl<T, U> Clone for RustlsConnectorService<T, U> {
    fn clone(&self) -> Self {
        Self {
            connector: self.connector.clone(),
            _t: PhantomData,
        }
    }
}

impl<T: Address, U> Service for RustlsConnectorService<T, U>
where
    U: AsyncRead + AsyncWrite + Unpin + fmt::Debug,
{
    type Request = Connection<T, U>;
    type Response = Connection<T, TlsStream<U>>;
    type Error = std::io::Error;
    type Future = ConnectAsyncExt<T, U>;

    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        Poll::Ready(Ok(()))
    }

    fn call(&mut self, stream: Connection<T, U>) -> Self::Future {
        trace!("SSL Handshake start for: {:?}", stream.host());
        let (io, stream) = stream.replace(());
        let host = DNSNameRef::try_from_ascii_str(stream.host())
            .expect("rustls currently only handles hostname-based connections. See https://github.com/briansmith/webpki/issues/54");
        ConnectAsyncExt {
            fut: TlsConnector::from(self.connector.clone()).connect(host, io),
            stream: Some(stream),
        }
    }
}

pub struct ConnectAsyncExt<T, U> {
    fut: Connect<U>,
    stream: Option<Connection<T, ()>>,
}

impl<T: Address, U> Future for ConnectAsyncExt<T, U>
where
    U: AsyncRead + AsyncWrite + Unpin + fmt::Debug,
{
    type Output = Result<Connection<T, TlsStream<U>>, std::io::Error>;

    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
        let this = self.get_mut();
        Poll::Ready(
            futures_util::ready!(Pin::new(&mut this.fut).poll(cx)).map(|stream| {
                let s = this.stream.take().unwrap();
                trace!("SSL Handshake success: {:?}", s.host());
                s.replace(stream).1
            }),
        )
    }
}