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|
use std::str;
use quick_xml::{
events::{BytesDecl, Event},
name::QName,
Reader, Writer,
};
use rsasl::prelude::{Mechname, SASLClient};
use tokio::io::{BufReader, ReadHalf, WriteHalf};
use tokio::net::TcpStream;
use tokio_native_tls::TlsStream;
use crate::stanza::{
sasl::{Auth, Response},
stream::{Stream, StreamFeature},
};
use crate::stanza::{
sasl::{Challenge, Success},
Element,
};
use crate::Jabber;
use crate::Result;
pub struct JabberClient<'j> {
reader: Reader<BufReader<ReadHalf<TlsStream<TcpStream>>>>,
writer: Writer<WriteHalf<TlsStream<TcpStream>>>,
jabber: &'j mut Jabber<'j>,
}
impl<'j> JabberClient<'j> {
pub fn new(
reader: Reader<BufReader<ReadHalf<TlsStream<TcpStream>>>>,
writer: Writer<WriteHalf<TlsStream<TcpStream>>>,
jabber: &'j mut Jabber<'j>,
) -> Self {
Self {
reader,
writer,
jabber,
}
}
pub async fn start_stream(&mut self) -> Result<()> {
// client to server
let declaration = BytesDecl::new("1.0", None, None);
let server = &self.jabber.server.to_owned().try_into()?;
let stream_element =
Stream::new_client(&self.jabber.jid, server, None, Some("en".to_string()));
self.writer
.write_event_async(Event::Decl(declaration))
.await;
let stream_element: Element<'_> = stream_element.into();
stream_element.write_start(&mut self.writer).await?;
// server to client
let mut buf = Vec::new();
self.reader.read_event_into_async(&mut buf).await?;
let _stream_response = Element::read_start(&mut self.reader).await?;
Ok(())
}
pub async fn get_features(&mut self) -> Result<Vec<StreamFeature>> {
Element::read(&mut self.reader).await?.try_into()
}
pub async fn negotiate(&mut self) -> Result<()> {
loop {
println!("loop");
let features = self.get_features().await?;
println!("features: {:?}", features);
match &features[0] {
StreamFeature::Sasl(sasl) => {
println!("sasl?");
self.sasl(&sasl).await?;
}
StreamFeature::Bind => todo!(),
x => println!("{:?}", x),
}
}
}
pub async fn sasl(&mut self, mechanisms: &Vec<String>) -> Result<()> {
println!("{:?}", mechanisms);
let sasl = SASLClient::new(self.jabber.auth.clone());
let mut offered_mechs: Vec<&Mechname> = Vec::new();
for mechanism in mechanisms {
offered_mechs.push(Mechname::parse(mechanism.as_bytes())?)
}
println!("{:?}", offered_mechs);
let mut session = sasl.start_suggested(&offered_mechs)?;
let selected_mechanism = session.get_mechname().as_str().to_owned();
println!("selected mech: {:?}", selected_mechanism);
let mut data: Option<Vec<u8>> = None;
if !session.are_we_first() {
// if not first mention the mechanism then get challenge data
// mention mechanism
let auth = Auth {
mechanism: selected_mechanism.as_str(),
sasl_data: "=",
};
Into::<Element>::into(auth).write(&mut self.writer).await?;
// get challenge data
let challenge = &Element::read(&mut self.reader).await?;
let challenge: Challenge = challenge.try_into()?;
println!("challenge: {:?}", challenge);
data = Some(challenge.sasl_data.to_owned());
println!("we didn't go first");
} else {
// if first, mention mechanism and send data
let mut sasl_data = Vec::new();
session.step64(None, &mut sasl_data).unwrap();
let auth = Auth {
mechanism: selected_mechanism.as_str(),
sasl_data: str::from_utf8(&sasl_data)?,
};
println!("{:?}", auth);
Into::<Element>::into(auth).write(&mut self.writer).await?;
let server_response = Element::read(&mut self.reader).await?;
println!("server_response: {:#?}", server_response);
match TryInto::<Challenge>::try_into(&server_response) {
Ok(challenge) => data = Some(challenge.sasl_data.to_owned()),
Err(_) => {
let success = TryInto::<Success>::try_into(&server_response)?;
if let Some(sasl_data) = success.sasl_data {
data = Some(sasl_data.to_owned())
}
}
}
println!("we went first");
}
// stepping the authentication exchange to completion
if data != None {
println!("data: {:?}", data);
let mut sasl_data = Vec::new();
while {
// decide if need to send more data over
let state = session
.step64(data.as_deref(), &mut sasl_data)
.expect("step errored!");
state.is_running()
} {
// While we aren't finished, receive more data from the other party
let response = Response {
sasl_data: str::from_utf8(&sasl_data)?,
};
println!("response: {:?}", response);
Into::<Element>::into(response)
.write(&mut self.writer)
.await?;
let server_response = Element::read(&mut self.reader).await?;
println!("server_response: {:?}", server_response);
match TryInto::<Challenge>::try_into(&server_response) {
Ok(challenge) => data = Some(challenge.sasl_data.to_owned()),
Err(_) => {
let success = TryInto::<Success>::try_into(&server_response)?;
if let Some(sasl_data) = success.sasl_data {
data = Some(sasl_data.to_owned())
}
}
}
}
}
self.start_stream().await?;
Ok(())
}
}
|
