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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184

use std::fmt;
use std::io::{self, Read, Write};

use bytes::{Buf, BufMut};
use futures::Poll;
use native_tls;
use tokio_io::{AsyncRead, AsyncWrite};

/// A stream that might be protected with TLS.
pub enum MaybeHttpsStream<T> {
    /// A stream over plain text.
    Http(T),
    /// A stream protected with TLS.
    Https(TlsStream<T>),
}

/// A stream protected with TLS.
pub struct TlsStream<T> {
    inner: native_tls::TlsStream<T>,
}

// ===== impl MaybeHttpsStream =====

impl<T: fmt::Debug> fmt::Debug for MaybeHttpsStream<T> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            MaybeHttpsStream::Http(ref s) => {
                f.debug_tuple("Http")
                    .field(s)
                    .finish()
            },
            MaybeHttpsStream::Https(ref s) => {
                f.debug_tuple("Https")
                    .field(s)
                    .finish()
            },
        }
    }
}

impl<T> From<native_tls::TlsStream<T>> for MaybeHttpsStream<T> {
    fn from(inner: native_tls::TlsStream<T>) -> Self {
        MaybeHttpsStream::Https(TlsStream::from(inner))
    }
}

impl<T> From<T> for MaybeHttpsStream<T> {
    fn from(inner: T) -> Self {
        MaybeHttpsStream::Http(inner)
    }
}

impl<T> From<TlsStream<T>> for MaybeHttpsStream<T> {
    fn from(inner: TlsStream<T>) -> Self {
        MaybeHttpsStream::Https(inner)
    }
}

impl<T: Read + Write> Read for MaybeHttpsStream<T> {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        match *self {
            MaybeHttpsStream::Http(ref mut s) => s.read(buf),
            MaybeHttpsStream::Https(ref mut s) => s.read(buf),
        }
    }
}

impl<T: Read + Write> Write for MaybeHttpsStream<T> {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        match *self {
            MaybeHttpsStream::Http(ref mut s) => s.write(buf),
            MaybeHttpsStream::Https(ref mut s) => s.write(buf),
        }
    }

    #[inline]
    fn flush(&mut self) -> io::Result<()> {
        match *self {
            MaybeHttpsStream::Http(ref mut s) => s.flush(),
            MaybeHttpsStream::Https(ref mut s) => s.flush(),
        }
    }
}

impl<T: AsyncRead + AsyncWrite> AsyncRead for MaybeHttpsStream<T> {
    #[inline]
    unsafe fn prepare_uninitialized_buffer(&self, buf: &mut [u8]) -> bool {
        match *self {
            MaybeHttpsStream::Http(ref s) => s.prepare_uninitialized_buffer(buf),
            MaybeHttpsStream::Https(ref s) => s.prepare_uninitialized_buffer(buf),
        }
    }

    #[inline]
    fn read_buf<B: BufMut>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
        match *self {
            MaybeHttpsStream::Http(ref mut s) => s.read_buf(buf),
            MaybeHttpsStream::Https(ref mut s) => s.read_buf(buf),
        }
    }
}

impl<T: AsyncWrite + AsyncRead> AsyncWrite for MaybeHttpsStream<T> {
    #[inline]
    fn shutdown(&mut self) -> Poll<(), io::Error> {
        match *self {
            MaybeHttpsStream::Http(ref mut s) => s.shutdown(),
            MaybeHttpsStream::Https(ref mut s) => s.shutdown(),
        }
    }

    #[inline]
    fn write_buf<B: Buf>(&mut self, buf: &mut B) -> Poll<usize, io::Error> {
        match *self {
            MaybeHttpsStream::Http(ref mut s) => s.write_buf(buf),
            MaybeHttpsStream::Https(ref mut s) => s.write_buf(buf),
        }
    }
}

// ===== impl TlsStream =====

impl<T> TlsStream<T> {
    pub(crate) fn new(inner: native_tls::TlsStream<T>) -> Self {
        TlsStream {
            inner,
        }
    }

    /// Get access to the internal `native_tls::TlsStream` stream which also
    /// transitively allows access to `T`.
    pub fn get_ref(&self) -> &native_tls::TlsStream<T> {
        &self.inner
    }


    /// Get mutable access to the internal `native_tls::TlsStream` stream which
    /// also transitively allows mutable access to `T`.
    pub fn get_mut(&mut self) -> &mut native_tls::TlsStream<T> {
        &mut self.inner
    }
}

impl<T: fmt::Debug> fmt::Debug for TlsStream<T> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        fmt::Debug::fmt(&self.inner, f)
    }
}

impl<T> From<native_tls::TlsStream<T>> for TlsStream<T> {
    fn from(stream: native_tls::TlsStream<T>) -> Self {
        TlsStream { inner: stream }
    }
}

impl<T: Read + Write> Read for TlsStream<T> {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        self.inner.read(buf)
    }
}

impl<T: Read + Write> Write for TlsStream<T> {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.inner.write(buf)
    }

    #[inline]
    fn flush(&mut self) -> io::Result<()> {
        self.inner.flush()
    }
}

impl<T: AsyncRead + AsyncWrite> AsyncRead for TlsStream<T> {}

impl<T: AsyncWrite + AsyncRead> AsyncWrite for TlsStream<T> {
    fn shutdown(&mut self) -> Poll<(), io::Error> {
        try_nb!(self.inner.shutdown());
        self.inner.get_mut().shutdown()
    }
}