apps: implement mutual tls with optional strict authentication

apps/src/args.rs

@@ -289,6 +289,8 @@ Options:
   --session-file PATH      File used to cache a TLS session for resumption.
   --source-port PORT       Source port to use when connecting to the server [default: 0].
   --initial-cwnd-packets PACKETS   The initial congestion window size in terms of packet count [default: 10].
+  --cert <file>            TLS certificate path for client authentication
+  --key <file>             TLS certificate key path for client authentication
   -h --help                Show this screen.
 ";
 
@@ -309,6 +311,8 @@ pub struct ClientArgs {
     pub source_port: u16,
     pub perform_migration: bool,
     pub send_priority_update: bool,
+    pub cert: Option<String>,
+    pub key: Option<String>,
 }
 
 impl Args for ClientArgs {
@@ -386,6 +390,18 @@ impl Args for ClientArgs {
 
         let send_priority_update = args.get_bool("--send-priority-update");
 
+        let cert = if args.get_bool("--cert") {
+            Some(args.get_str("--cert").to_string())
+        } else {
+            None
+        };
+
+        let key = if args.get_bool("--key") {
+            Some(args.get_str("--key").to_string())
+        } else {
+            None
+        };
+
         ClientArgs {
             version,
             dump_response_path,
@@ -402,6 +418,8 @@ impl Args for ClientArgs {
             source_port,
             perform_migration,
             send_priority_update,
+            cert,
+            key,
         }
     }
 }
@@ -424,6 +442,8 @@ impl Default for ClientArgs {
             source_port: 0,
             perform_migration: false,
             send_priority_update: false,
+            cert: None,
+            key: None,
         }
     }
 }
@@ -464,6 +484,8 @@ Options:
   --disable-gso               Disable GSO (linux only).
   --disable-pacing            Disable pacing (linux only).
   --initial-cwnd-packets PACKETS      The initial congestion window size in terms of packet count [default: 10].
+  --trust-origin-ca-pem <file>  Path to the pem file of the client origin's CA for mutual TLS.
+  --trust-strict              Enable mandatory client certificate presence when using mutual TLS.
   -h --help                   Show this screen.
 ";
 
@@ -478,6 +500,8 @@ pub struct ServerArgs {
     pub disable_gso: bool,
     pub disable_pacing: bool,
     pub enable_pmtud: bool,
+    pub trust_origin_ca_pem: Option<String>,
+    pub trust_strict: bool,
 }
 
 impl Args for ServerArgs {
@@ -494,6 +518,14 @@ impl Args for ServerArgs {
         let disable_pacing = args.get_bool("--disable-pacing");
         let enable_pmtud = args.get_bool("--enable-pmtud");
 
+        let trust_origin_ca_pem = if args.get_bool("--trust-origin-ca-pem") {
+            Some(args.get_str("--trust-origin-ca-pem").to_string())
+        } else {
+            None
+        };
+
+        let trust_strict = args.get_bool("--trust-strict");
+
         ServerArgs {
             listen,
             no_retry,
@@ -504,6 +536,8 @@ impl Args for ServerArgs {
             disable_gso,
             disable_pacing,
             enable_pmtud,
+            trust_origin_ca_pem,
+            trust_strict,
         }
     }
 }

apps/src/bin/quiche-server.rs

@@ -106,6 +106,14 @@ fn main() {
     config.load_cert_chain_from_pem_file(&args.cert).unwrap();
     config.load_priv_key_from_pem_file(&args.key).unwrap();
 
+    if let Some(ref trust_origin_ca_pem) = args.trust_origin_ca_pem {
+        config
+            .load_verify_locations_from_file(trust_origin_ca_pem)
+            .map_err(|e| format!("error loading origin CA file : {}", e))
+            .unwrap();
+        config.verify_peer(true);
+    }
+
     config.set_application_protos(&conn_args.alpns).unwrap();
 
     config.discover_pmtu(args.enable_pmtud);
@@ -441,6 +449,12 @@ fn main() {
                 (client.conn.is_in_early_data() ||
                     client.conn.is_established())
             {
+                if args.trust_origin_ca_pem.is_some() && args.trust_strict && client.conn.peer_cert().is_none() {
+                    info!("anonymous client connections disallowed due to trust-strict, closing connection");
+                    let reason = "no certificate received".as_bytes();
+                    let _ = client.conn.close(false, 0x3e5b, &reason);
+                }
+
                 // At this stage the ALPN negotiation succeeded and selected a
                 // single application protocol name. We'll use this to construct
                 // the correct type of HttpConn but `application_proto()`

apps/src/client.rs

@@ -99,7 +99,15 @@ pub fn connect(
     };
 
     // Create the configuration for the QUIC connection.
-    let mut config = quiche::Config::new(args.version).unwrap();
+    let mut config = quiche::Config::new(quiche::PROTOCOL_VERSION).unwrap();
+
+    if let Some(cert) = args.cert {
+        config.load_cert_chain_from_pem_file(&cert).unwrap();
+    }
+
+    if let Some(key) = args.key {
+        config.load_priv_key_from_pem_file(&key).unwrap();
+    }
 
     if let Some(ref trust_origin_ca_pem) = args.trust_origin_ca_pem {
         config