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tokio-xmpp: Support channel binding on TLS 1.3

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This is defined in RFC 9266, and relies on the Exported Keying Material
to be passed to the SASL implementation.
This commit is contained in:
Emmanuel Gil Peyrot 2023-10-25 19:22:50 +02:00
parent b5aa36b72c
commit faabc2984a
1 changed files with 29 additions and 2 deletions
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31
tokio-xmpp/src/client/simple_client.rs
View file

@ -1,5 +1,7 @@
use futures::{sink::SinkExt, Sink, Stream};
use idna;
#[cfg(feature = "tls-native")]
use log::warn;
use sasl::common::{ChannelBinding, Credentials};
use std::pin::Pin;
use std::str::FromStr;
@ -8,7 +10,7 @@ use tokio::net::TcpStream;
#[cfg(feature = "tls-native")]
use tokio_native_tls::TlsStream;
#[cfg(all(feature = "tls-rust", not(feature = "tls-native")))]
use tokio_rustls::client::TlsStream;
use tokio_rustls::{client::TlsStream, rustls::ProtocolVersion};
use tokio_stream::StreamExt;
use xmpp_parsers::{ns, Element, Jid};
@ -62,9 +64,34 @@ impl Client {
xmpp_stream::XMPPStream::start(tcp_stream, jid.clone(), ns::JABBER_CLIENT.to_owned())
.await?;
let channel_binding;
let xmpp_stream = if xmpp_stream.stream_features.can_starttls() {
// TlsStream
let tls_stream = starttls(xmpp_stream).await?;
#[cfg(feature = "tls-native")]
{
warn!("tls-native doesn’t support channel binding, please use tls-rust if you want this feature!");
channel_binding = ChannelBinding::None;
}
#[cfg(all(feature = "tls-rust", not(feature = "tls-native")))]
{
let (_, connection) = tls_stream.get_ref();
match connection.protocol_version() {
// TODO: Add support for TLS 1.2 and earlier.
Some(ProtocolVersion::TLSv1_3) => {
let data = vec![0u8; 32];
let data = connection.export_keying_material(
data,
b"EXPORTER-Channel-Binding",
None,
)?;
channel_binding = ChannelBinding::TlsExporter(data);
}
_ => {
channel_binding = ChannelBinding::None;
}
}
}
// Encrypted XMPPStream
xmpp_stream::XMPPStream::start(tls_stream, jid.clone(), ns::JABBER_CLIENT.to_owned())
.await?
@ -75,7 +102,7 @@ impl Client {
let creds = Credentials::default()
.with_username(username)
.with_password(password)
.with_channel_binding(ChannelBinding::None);
.with_channel_binding(channel_binding);
// Authenticated (unspecified) stream
let stream = auth(xmpp_stream, creds).await?;
// Authenticated XMPPStream