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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151

//! OpenSSL based connector service.
//!
//! See [`TlsConnector`] for main connector service factory docs.

use std::{
    future::Future,
    io,
    pin::Pin,
    task::{Context, Poll},
};

use actix_rt::net::ActixStream;
use actix_service::{Service, ServiceFactory};
use actix_utils::future::{ok, Ready};
use futures_core::ready;
use openssl::ssl::SslConnector;
use tokio_openssl::SslStream as AsyncSslStream;
use tracing::trace;

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

pub mod reexports {
    //! Re-exports from `openssl` and `tokio-openssl` that are useful for connectors.

    pub use openssl::ssl::{Error, HandshakeError, SslConnector, SslConnectorBuilder, SslMethod};
    pub use tokio_openssl::SslStream as AsyncSslStream;
}

/// Connector service factory using `openssl`.
pub struct TlsConnector {
    connector: SslConnector,
}

impl TlsConnector {
    /// Constructs new connector service factory from an `openssl` connector.
    pub fn new(connector: SslConnector) -> Self {
        TlsConnector { connector }
    }

    /// Constructs new connector service from an `openssl` connector.
    pub fn service(connector: SslConnector) -> TlsConnectorService {
        TlsConnectorService { connector }
    }
}

impl Clone for TlsConnector {
    fn clone(&self) -> Self {
        Self {
            connector: self.connector.clone(),
        }
    }
}

impl<R, IO> ServiceFactory<Connection<R, IO>> for TlsConnector
where
    R: Host,
    IO: ActixStream + 'static,
{
    type Response = Connection<R, AsyncSslStream<IO>>;
    type Error = io::Error;
    type Config = ();
    type Service = TlsConnectorService;
    type InitError = ();
    type Future = Ready<Result<Self::Service, Self::InitError>>;

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

/// Connector service using `openssl`.
pub struct TlsConnectorService {
    connector: SslConnector,
}

impl Clone for TlsConnectorService {
    fn clone(&self) -> Self {
        Self {
            connector: self.connector.clone(),
        }
    }
}

impl<R, IO> Service<Connection<R, IO>> for TlsConnectorService
where
    R: Host,
    IO: ActixStream,
{
    type Response = Connection<R, AsyncSslStream<IO>>;
    type Error = io::Error;
    type Future = ConnectFut<R, IO>;

    actix_service::always_ready!();

    fn call(&self, stream: Connection<R, IO>) -> Self::Future {
        trace!("TLS handshake start for: {:?}", stream.hostname());

        let (io, stream) = stream.replace_io(());
        let host = stream.hostname();

        let config = self
            .connector
            .configure()
            .expect("SSL connect configuration was invalid.");

        let ssl = config
            .into_ssl(host)
            .expect("SSL connect configuration was invalid.");

        ConnectFut {
            io: Some(AsyncSslStream::new(ssl, io).unwrap()),
            stream: Some(stream),
        }
    }
}

/// Connect future for OpenSSL service.
#[doc(hidden)]
pub struct ConnectFut<R, IO> {
    io: Option<AsyncSslStream<IO>>,
    stream: Option<Connection<R, ()>>,
}

impl<R: Host, IO> Future for ConnectFut<R, IO>
where
    R: Host,
    IO: ActixStream,
{
    type Output = Result<Connection<R, AsyncSslStream<IO>>, io::Error>;

    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
        let this = self.get_mut();

        match ready!(Pin::new(this.io.as_mut().unwrap()).poll_connect(cx)) {
            Ok(_) => {
                let stream = this.stream.take().unwrap();
                trace!("TLS handshake success: {:?}", stream.hostname());
                Poll::Ready(Ok(stream.replace_io(this.io.take().unwrap()).1))
            }
            Err(err) => {
                trace!("TLS handshake error: {:?}", err);
                Poll::Ready(Err(io::Error::new(
                    io::ErrorKind::Other,
                    format!("{}", err),
                )))
            }
        }
    }
}