Trying to do TLS

src/rpc_client.rs

@@ -6,13 +6,16 @@ use bytes::IntoBuf;
 use futures::stream::futures_unordered::FuturesUnordered;
 use futures::stream::StreamExt;
 use futures_util::future::FutureExt;
-use hyper::client::Client;
+use hyper::client::{Client, HttpConnector};
 use hyper::{Body, Method, Request, StatusCode};
+use hyper_rustls::HttpsConnector;
 
 use crate::data::*;
 use crate::error::Error;
 use crate::membership::System;
 use crate::proto::Message;
+use crate::server::*;
+use crate::tls_util;
 
 pub async fn rpc_call_many(
 	sys: Arc<System>,
@@ -88,14 +91,34 @@ pub async fn rpc_call(
 	sys.rpc_client.call(&addr, msg, timeout).await
 }
 
-pub struct RpcClient {
-	pub client: Client<hyper::client::HttpConnector, hyper::Body>,
+pub enum RpcClient {
+	HTTP(Client<HttpConnector, hyper::Body>),
+	HTTPS(Client<HttpsConnector<HttpConnector>, hyper::Body>),
 }
 
 impl RpcClient {
-	pub fn new() -> Self {
-		RpcClient {
-			client: Client::new(),
+	pub fn new(tls_config: &Option<TlsConfig>) -> Result<Self, Error> {
+		if let Some(cf) = tls_config {
+			let ca_certs = tls_util::load_certs(&cf.ca_cert)?;
+			let node_certs = tls_util::load_certs(&cf.node_cert)?;
+			let node_key = tls_util::load_private_key(&cf.node_key)?;
+
+			let mut config = rustls::ClientConfig::new();
+
+			for crt in ca_certs.iter() {
+				config.root_store.add(crt)?;
+			}
+
+			config.set_single_client_cert([&ca_certs[..], &node_certs[..]].concat(), node_key)?;
+
+			let mut http_connector = HttpConnector::new();
+			http_connector.enforce_http(false);
+			let connector =
+				HttpsConnector::<HttpConnector>::from((http_connector, Arc::new(config)));
+
+			Ok(RpcClient::HTTPS(Client::builder().build(connector)))
+		} else {
+			Ok(RpcClient::HTTP(Client::new()))
 		}
 	}
 
@@ -105,14 +128,26 @@ impl RpcClient {
 		msg: &Message,
 		timeout: Duration,
 	) -> Result<Message, Error> {
-		let uri = format!("http://{}/rpc", to_addr);
+		let uri = match self {
+			RpcClient::HTTP(_) => format!("http://{}/rpc", to_addr),
+			RpcClient::HTTPS(_) => format!("https://{}/rpc", to_addr),
+		};
+
 		let req = Request::builder()
 			.method(Method::POST)
 			.uri(uri)
 			.body(Body::from(rmp_to_vec_all_named(msg)?))?;
 
-		let resp_fut = self.client.request(req).fuse();
-		let resp = tokio::time::timeout(timeout, resp_fut).await??;
+		let resp_fut = match self {
+			RpcClient::HTTP(client) => client.request(req).fuse(),
+			RpcClient::HTTPS(client) => client.request(req).fuse(),
+		};
+		let resp = tokio::time::timeout(timeout, resp_fut)
+			.await?
+			.map_err(|e| {
+				eprintln!("RPC client error: {}", e);
+				e
+			})?;
 
 		if resp.status() == StatusCode::OK {
 			let body = hyper::body::to_bytes(resp.into_body()).await?;