garage/src/rpc/tls_util.rs

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Rust
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use core::future::Future;
use core::task::{Context, Poll};
use std::pin::Pin;
use std::sync::Arc;
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use std::{fs, io};
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use futures_util::future::*;
use hyper::client::connect::Connection;
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use hyper::client::HttpConnector;
use hyper::service::Service;
use hyper::Uri;
use hyper_rustls::MaybeHttpsStream;
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use rustls::internal::pemfile;
use tokio::io::{AsyncRead, AsyncWrite};
use tokio_rustls::TlsConnector;
use webpki::DNSNameRef;
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use crate::error::Error;
pub fn load_certs(filename: &str) -> Result<Vec<rustls::Certificate>, Error> {
let certfile = fs::File::open(&filename)?;
let mut reader = io::BufReader::new(certfile);
let certs = pemfile::certs(&mut reader).map_err(|_| {
Error::Message(format!(
"Could not deecode certificates from file: {}",
filename
))
})?;
if certs.is_empty() {
return Err(Error::Message(format!(
"Invalid certificate file: {}",
filename
)));
}
Ok(certs)
}
pub fn load_private_key(filename: &str) -> Result<rustls::PrivateKey, Error> {
let keyfile = fs::File::open(&filename)?;
let mut reader = io::BufReader::new(keyfile);
let keys = pemfile::rsa_private_keys(&mut reader).map_err(|_| {
Error::Message(format!(
"Could not decode private key from file: {}",
filename
))
})?;
if keys.len() != 1 {
return Err(Error::Message(format!(
"Invalid private key file: {} ({} private keys)",
filename,
keys.len()
)));
}
Ok(keys[0].clone())
}
// ---- AWFUL COPYPASTA FROM HYPER-RUSTLS connector.rs
// ---- ALWAYS USE `garage` AS HOSTNAME FOR TLS VERIFICATION
#[derive(Clone)]
pub struct HttpsConnectorFixedDnsname<T> {
http: T,
tls_config: Arc<rustls::ClientConfig>,
fixed_dnsname: &'static str,
}
type BoxError = Box<dyn std::error::Error + Send + Sync>;
impl HttpsConnectorFixedDnsname<HttpConnector> {
pub fn new(mut tls_config: rustls::ClientConfig, fixed_dnsname: &'static str) -> Self {
let mut http = HttpConnector::new();
http.enforce_http(false);
tls_config.alpn_protocols = vec![b"h2".to_vec(), b"http/1.1".to_vec()];
Self {
http,
tls_config: Arc::new(tls_config),
fixed_dnsname,
}
}
}
impl<T> Service<Uri> for HttpsConnectorFixedDnsname<T>
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where
T: Service<Uri>,
T::Response: Connection + AsyncRead + AsyncWrite + Send + Unpin + 'static,
T::Future: Send + 'static,
T::Error: Into<BoxError>,
{
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type Response = MaybeHttpsStream<T::Response>;
type Error = BoxError;
#[allow(clippy::type_complexity)]
type Future =
Pin<Box<dyn Future<Output = Result<MaybeHttpsStream<T::Response>, BoxError>> + Send>>;
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
match self.http.poll_ready(cx) {
Poll::Ready(Ok(())) => Poll::Ready(Ok(())),
Poll::Ready(Err(e)) => Poll::Ready(Err(e.into())),
Poll::Pending => Poll::Pending,
}
}
fn call(&mut self, dst: Uri) -> Self::Future {
let is_https = dst.scheme_str() == Some("https");
if !is_https {
let connecting_future = self.http.call(dst);
let f = async move {
let tcp = connecting_future.await.map_err(Into::into)?;
Ok(MaybeHttpsStream::Http(tcp))
};
f.boxed()
} else {
let cfg = self.tls_config.clone();
let connecting_future = self.http.call(dst);
let dnsname =
DNSNameRef::try_from_ascii_str(self.fixed_dnsname).expect("Invalid fixed dnsname");
let f = async move {
let tcp = connecting_future.await.map_err(Into::into)?;
let connector = TlsConnector::from(cfg);
let tls = connector
.connect(dnsname, tcp)
.await
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
Ok(MaybeHttpsStream::Https(tls))
};
f.boxed()
}
}
}