Line data Source code
1 : use crate::config::SslMode;
2 : use crate::maybe_tls_stream::MaybeTlsStream;
3 : use crate::tls::private::ForcePrivateApi;
4 : use crate::tls::TlsConnect;
5 : use crate::Error;
6 : use bytes::BytesMut;
7 : use postgres_protocol2::message::frontend;
8 : use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
9 :
10 15 : pub async fn connect_tls<S, T>(
11 15 : mut stream: S,
12 15 : mode: SslMode,
13 15 : tls: T,
14 15 : ) -> Result<MaybeTlsStream<S, T::Stream>, Error>
15 15 : where
16 15 : S: AsyncRead + AsyncWrite + Unpin,
17 15 : T: TlsConnect<S>,
18 15 : {
19 1 : match mode {
20 1 : SslMode::Disable => return Ok(MaybeTlsStream::Raw(stream)),
21 1 : SslMode::Prefer if !tls.can_connect(ForcePrivateApi) => {
22 1 : return Ok(MaybeTlsStream::Raw(stream))
23 : }
24 13 : SslMode::Prefer | SslMode::Require => {}
25 13 : }
26 13 :
27 13 : let mut buf = BytesMut::new();
28 13 : frontend::ssl_request(&mut buf);
29 13 : stream.write_all(&buf).await.map_err(Error::io)?;
30 :
31 13 : let mut buf = [0];
32 13 : stream.read_exact(&mut buf).await.map_err(Error::io)?;
33 :
34 13 : if buf[0] != b'S' {
35 0 : if SslMode::Require == mode {
36 0 : return Err(Error::tls("server does not support TLS".into()));
37 : } else {
38 0 : return Ok(MaybeTlsStream::Raw(stream));
39 : }
40 13 : }
41 :
42 13 : let stream = tls
43 13 : .connect(stream)
44 13 : .await
45 13 : .map_err(|e| Error::tls(e.into()))?;
46 :
47 13 : Ok(MaybeTlsStream::Tls(stream))
48 15 : }
|