Remove redundant code

Cargo.lock

@@ -315,6 +315,8 @@ checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 name = "base"
 version = "0.1.0"
 dependencies = [
+ "rustls",
+ "rustls-pemfile",
  "serde",
 ]
 
@@ -1574,7 +1576,6 @@ dependencies = [
  "log",
  "reqwest",
  "rustls",
- "rustls-pemfile",
  "tokio",
  "tokio-tungstenite",
  "urlencoding",
@@ -1594,7 +1595,6 @@ dependencies = [
  "futures",
  "log",
  "rustls",
- "rustls-pemfile",
  "serde",
  "tokio",
  "webpki",

base/Cargo.toml

@@ -5,3 +5,5 @@ edition = "2021"
 
 [dependencies]
 serde = { version = "1.0.144", features = ["derive"] }
+rustls-pemfile = "1.0.1"
+rustls = "0.20.6"

base/src/cert_utils.rs

@@ -0,0 +1,37 @@
+use std::error::Error;
+use std::io::{Cursor, ErrorKind};
+
+use rustls::{Certificate, PrivateKey};
+use rustls_pemfile::{read_one, Item};
+
+/// Parse PEM certificates bytes into a [`rustls::Certificate`] structure
+pub fn parse_pem_certificates(certs: &[u8]) -> Result<Vec<Certificate>, Box<dyn Error>> {
+    Ok(rustls_pemfile::certs(&mut Cursor::new(certs))?
+        .into_iter()
+        .map(Certificate)
+        .collect())
+}
+
+/// Parse PEM private key bytes into a [`rustls::PrivateKey`] structure
+pub fn parse_pem_private_key(privkey: &[u8]) -> Result<PrivateKey, Box<dyn Error>> {
+    let key = match read_one(&mut Cursor::new(privkey))? {
+        None => {
+            Err(std::io::Error::new(
+                ErrorKind::Other,
+                "Failed to extract private key!",
+            ))?;
+            unreachable!()
+        }
+        Some(Item::PKCS8Key(key)) => key,
+        Some(Item::RSAKey(key)) => key,
+        _ => {
+            Err(std::io::Error::new(
+                ErrorKind::Other,
+                "Unsupported private key type!",
+            ))?;
+            unreachable!();
+        }
+    };
+
+    Ok(PrivateKey(key))
+}

base/src/lib.rs

@@ -1,7 +1,4 @@
-#[derive(serde::Serialize, serde::Deserialize, Copy, Clone, Debug)]
+pub mod cert_utils;
-pub struct RelayedPort {
+mod structs;
-    pub id: usize,
-    pub port: u16,
-}
 
-pub type RemoteConfig = Vec<RelayedPort>;
+pub use structs::{RelayedPort, RemoteConfig};

base/src/structs.rs

@@ -0,0 +1,7 @@
+#[derive(serde::Serialize, serde::Deserialize, Copy, Clone, Debug)]
+pub struct RelayedPort {
+    pub id: usize,
+    pub port: u16,
+}
+
+pub type RemoteConfig = Vec<RelayedPort>;

tcp_relay_client/Cargo.toml

@@ -15,5 +15,4 @@ tokio-tungstenite = { version = "0.17.2", features = ["__rustls-tls", "rustls-tl
 urlencoding = "2.1.0"
 rustls = { version = "0.20.6" }
 hyper-rustls = { version = "0.23.0", features = ["rustls-native-certs"] }
-rustls-pemfile = { version = "1.0.1" }
 bytes = "1.2.1"

tcp_relay_client/src/relay_client.rs

@@ -1,14 +1,14 @@
-use std::io::Cursor;
 use std::sync::Arc;
 
 use futures::{SinkExt, StreamExt};
 use hyper_rustls::ConfigBuilderExt;
-use rustls::{Certificate, PrivateKey, RootCertStore};
+use rustls::RootCertStore;
-use rustls_pemfile::{read_one, Item};
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::{TcpListener, TcpStream};
 use tokio_tungstenite::tungstenite::Message;
 
+use base::cert_utils;
+
 use crate::client_config::ClientConfig;
 
 pub async fn relay_client(ws_url: String, listen_address: String, config: Arc<ClientConfig>) {
@@ -46,11 +46,10 @@ async fn relay_connection(ws_url: String, socket: TcpStream, conf: Arc<ClientCon
             Some(cert) => {
                 log::debug!("Using custom root certificates");
                 let mut store = RootCertStore::empty();
-                rustls_pemfile::certs(&mut Cursor::new(cert))
+                cert_utils::parse_pem_certificates(&cert)
-                    .expect("Failed to parse root certificates!")
+                    .unwrap()
-                    .into_iter()
+                    .iter()
-                    .map(Certificate)
+                    .for_each(|c| store.add(c).expect("Failed to add certificate to chain!"));
-                    .for_each(|c| store.add(&c).expect("Failed to add certificate to chain!"));
 
                 config.with_root_certificates(store)
             }
@@ -59,29 +58,14 @@ async fn relay_connection(ws_url: String, socket: TcpStream, conf: Arc<ClientCon
         let config = match conf.get_client_keypair() {
             None => config.with_no_client_auth(),
             Some((certs, key)) => {
-                let certs = rustls_pemfile::certs(&mut Cursor::new(certs))
+                let certs = cert_utils::parse_pem_certificates(certs)
-                    .expect("Failed to parse client certificates!")
+                    .expect("Failed to parse client certificate!");
-                    .into_iter()
-                    .map(Certificate)
-                    .collect::<Vec<_>>();
 
-                let key = match read_one(&mut Cursor::new(key))
+                let key = cert_utils::parse_pem_private_key(key)
-                    .expect("Failed to read client private key!")
+                    .expect("Failed to parse client auth private key!");
-                {
-                    None => {
-                        log::error!("Failed to extract private key!");
-                        panic!();
-                    }
-                    Some(Item::PKCS8Key(key)) => key,
-                    Some(Item::RSAKey(key)) => key,
-                    _ => {
-                        log::error!("Unsupported private key type!");
-                        panic!();
-                    }
-                };
 
                 config
-                    .with_single_cert(certs, PrivateKey(key))
+                    .with_single_cert(certs, key)
                     .expect("Failed to set client certificate!")
             }
         };

tcp_relay_server/Cargo.toml

@@ -16,5 +16,4 @@ serde = { version = "1.0.144", features = ["derive"] }
 tokio = { version = "1", features = ["full"] }
 futures = "0.3.24"
 rustls = "0.20.6"
-rustls-pemfile = "1.0.1"
 webpki = "0.22.0"

tcp_relay_server/src/main.rs

@@ -1,14 +1,10 @@
-use std::fs::File;
-use std::io::BufReader;
 use std::sync::Arc;
 
 use actix_web::web::Data;
 use actix_web::{middleware, web, App, HttpRequest, HttpResponse, HttpServer, Responder};
 use clap::Parser;
-use rustls::{Certificate, PrivateKey};
-use rustls_pemfile::{certs, read_one, Item};
 
-use base::RelayedPort;
+use base::{cert_utils, RelayedPort};
 use tcp_relay_server::relay_ws::relay_ws;
 use tcp_relay_server::server_config::ServerConfig;
 use tcp_relay_server::tls_cert_client_verifier::CustomCertClientVerifier;
@@ -80,29 +76,16 @@ async fn main() -> std::io::Result<()> {
     // Load TLS configuration, if any
     let tls_config = if let (Some(cert), Some(key)) = (&args.tls_cert, &args.tls_key) {
         // Load TLS certificate & private key
-        let cert_file = &mut BufReader::new(File::open(cert).unwrap());
+        let cert_file = std::fs::read(cert).expect("Failed to read certificate file");
-        let key_file = &mut BufReader::new(File::open(key).unwrap());
+        let key_file = std::fs::read(key).expect("Failed to read server private key");
 
         // Get certificates chain
-        let cert_chain = certs(cert_file)
+        let cert_chain =
-            .unwrap()
+            cert_utils::parse_pem_certificates(&cert_file).expect("Failed to extract certificates");
-            .into_iter()
-            .map(Certificate)
-            .collect();
 
         // Get private key
-        let key = match read_one(key_file).expect("Failed to read private key!") {
+        let key =
-            None => {
+            cert_utils::parse_pem_private_key(&key_file).expect("Failed to extract private key!");
-                log::error!("Failed to extract private key!");
-                panic!();
-            }
-            Some(Item::PKCS8Key(key)) => key,
-            Some(Item::RSAKey(key)) => key,
-            _ => {
-                log::error!("Unsupported private key type!");
-                panic!();
-            }
-        };
 
         let config = rustls::ServerConfig::builder().with_safe_defaults();
 
@@ -113,7 +96,7 @@ async fn main() -> std::io::Result<()> {
         };
 
         let config = config
-            .with_single_cert(cert_chain, PrivateKey(key))
+            .with_single_cert(cert_chain, key)
             .expect("Failed to load TLS certificate!");
 
         Some(config)

tcp_relay_server/src/tls_cert_client_verifier.rs

@@ -1,11 +1,10 @@
-use std::fs::File;
-use std::io::BufReader;
 use std::sync::Arc;
 use std::time::SystemTime;
 
 use rustls::server::{AllowAnyAuthenticatedClient, ClientCertVerified, ClientCertVerifier};
 use rustls::{Certificate, DistinguishedNames, Error, RootCertStore};
-use rustls_pemfile::certs;
+
+use base::cert_utils::parse_pem_certificates;
 
 use crate::server_config::ServerConfig;
 
@@ -19,16 +18,11 @@ impl CustomCertClientVerifier {
             .tls_client_auth_root_cert
             .as_deref()
             .expect("No root certificates for client authentication provided!");
-        let cert_file = &mut BufReader::new(
+        let cert_file = std::fs::read(cert_path)
-            File::open(cert_path)
+            .expect("Failed to read root certificates for client authentication!");
-                .expect("Failed to read root certificates for client authentication!"),
-        );
 
-        let root_certs = certs(cert_file)
+        let root_certs = parse_pem_certificates(&cert_file)
-            .unwrap()
+            .expect("Failed to read root certificates for server authentication!");
-            .into_iter()
-            .map(Certificate)
-            .collect::<Vec<_>>();
 
         if root_certs.is_empty() {
             log::error!("No certificates found for client authentication!");