adding the root_cas option to SessionBuilder

Cargo.toml

@@ -17,7 +17,7 @@ mio = { version = "=0.8.6" }
 # Default enable napi4 feature, see https://nodejs.org/api/n-api.html#node-api-version-matrix
 napi = { version = "2.12.1", default-features = false, features = ["napi4", "tokio_rt"] }
 napi-derive = "2.12.1"
-ngrok = { version = "0.14.0-pre.12" }
+ngrok = { version = "=0.14.0-pre.13" }
 parking_lot = "0.12.1"
 regex = "1.9.5"
 rustls = "0.22.2"

README.md

@@ -223,6 +223,10 @@ const listener = await ngrok.forward({
     console.log(`disconnected, addr ${addr} error: ${error}`);
   },
   session_metadata: "Online in One Line",
+  // advanced session connection configuration
+  server_addr: "example.com:443",
+  root_cas: "trusted",
+  session_ca_cert: fs.readFileSync("ca.pem", "utf8"),  
   // listener configuration
   metadata: "example listener metadata from javascript",
   domain: "<domain>",

__test__/connect.spec.mjs

@@ -81,7 +81,7 @@ test("forward https", async (t) => {
 });
 
 test("forward http2", async (t) => {
-  const httpServer = await makeHttp({useHttp2: true});
+  const httpServer = await makeHttp({ useHttp2: true });
   const listener = await ngrok.forward({
     // numeric port
     addr: parseInt(httpServer.listenTo.split(":")[1], 10),
@@ -100,7 +100,7 @@ test("forward http2", async (t) => {
 });
 
 test("forward http2 no cert validation", async (t) => {
-  const httpServer = await makeHttp({useHttp2: true});
+  const httpServer = await makeHttp({ useHttp2: true });
   const listener = await ngrok.forward({
     // numeric port
     addr: parseInt(httpServer.listenTo.split(":")[1], 10),
@@ -280,6 +280,45 @@ test.serial("forward bad domain", async (t) => {
     { instanceOf: Error }
   );
   t.is("ERR_NGROK_326", error.errorCode, error.message);
+
+  await shutdown(null, httpServer.socket);
+});
+
+// serial to not run into double error on a session issue
+test.serial("root_cas", async (t) => {
+  // remove any lingering sessions
+  await ngrok.disconnect();
+
+  const httpServer = await makeHttp();
+  ngrok.authtoken(process.env["NGROK_AUTHTOKEN"]);
+
+  // tls error connecting to marketing site
+  var error = await t.throwsAsync(
+    async () => {
+      await ngrok.forward({
+        addr: httpServer.listenTo,
+        force_new_session: true,
+        root_cas: "trusted",
+        server_addr: "ngrok.com:443",
+      });
+    },
+    { instanceOf: Error }
+  );
+  t.true(error.message.includes("tls handshake"), error.message);
+
+  // non-tls error connecting to marketing site with "host" root_cas
+  error = await t.throwsAsync(
+    async () => {
+      await ngrok.forward({
+        addr: httpServer.listenTo,
+        force_new_session: true,
+        root_cas: "host",
+        server_addr: "ngrok.com:443",
+      });
+    },
+    { instanceOf: Error }
+  );
+  t.false(error.message.includes("tls handshake"), error.message);
 });
 
 test("policy", async (t) => {

__test__/online.spec.mjs

@@ -143,7 +143,9 @@ test("tls backend", async (t) => {
 
 test("unverified tls backend", async (t) => {
   const session = await makeSession();
-  const listener = await session.httpEndpoint().verifyUpstreamTls(false)
+  const listener = await session
+    .httpEndpoint()
+    .verifyUpstreamTls(false)
     .listenAndForward("https://dashboard.ngrok.com");
 
   const error = await t.throwsAsync(

examples/nextjs/ngrok.config.js

@@ -1,6 +1,5 @@
 const ngrok = require("@ngrok/ngrok");
 
-
 // setup ngrok ingress in the parent process,
 // in forked processes "send" will exist.
 const makeListener = process.send === undefined;

src/config.rs

@@ -65,6 +65,9 @@ pub struct Config {
     /// and the API.
     #[napi(js_name = "forwards_to")]
     pub forwards_to: Option<String>,
+    /// Force a new session connection to be made.
+    #[napi(js_name = "force_new_session")]
+    pub force_new_session: Option<bool>,
     /// Unused, will warn and be ignored
     #[napi(js_name = "host_header")]
     pub host_header: Option<String>,
@@ -249,11 +252,32 @@ pub struct Config {
     /// [ngrok dashboard]: https://dashboard.ngrok.com/cloud-edge/tcp-addresses
     #[napi(js_name = "remote_addr")]
     pub remote_addr: Option<String>,
+    /// Sets the file path to a default certificate in PEM format to validate ngrok Session TLS connections.
+    /// Setting to "trusted" is the default, using the ngrok CA certificate.
+    /// Setting to "host" will verify using the certificates on the host operating system.
+    /// A client config set via tls_config after calling root_cas will override this value.
+    ///
+    /// Corresponds to the [root_cas parameter in the ngrok docs]
+    ///
+    /// [root_cas parameter in the ngrok docs]: https://ngrok.com/docs/ngrok-agent/config#root_cas
+    #[napi(js_name = "root_cas")]
+    pub root_cas: Option<String>,
     /// The scheme that this edge should use.
     /// "HTTPS" or "HTTP", defaults to "HTTPS".
     /// If multiple are given only the last one is used.
     #[napi(ts_type = "string|Array<string>")]
     pub schemes: Option<Vec<String>>,
+    /// Configures the TLS certificate used to connect to the ngrok service while
+    /// establishing the session. Use this option only if you are connecting through
+    /// a man-in-the-middle or deep packet inspection proxy. Pass in the bytes of the certificate
+    /// to be used to validate the connection, then override the address to connect to via
+    /// the server_addr call.
+    ///
+    /// Roughly corresponds to the [root_cas parameter in the ngrok docs].
+    ///
+    /// [root_cas parameter in the ngrok docs]: https://ngrok.com/docs/ngrok-agent/config#root_cas
+    #[napi(js_name = "session_ca_cert")]
+    pub session_ca_cert: Option<String>,
     /// Configures the opaque, machine-readable metadata string for this session.
     /// Metadata is made available to you in the ngrok dashboard and the Agents API
     /// resource. It is a useful way to allow you to uniquely identify sessions. We
@@ -264,6 +288,14 @@ pub struct Config {
     /// [metdata parameter in the ngrok docs]: https://ngrok.com/docs/ngrok-agent/config#metadata
     #[napi(js_name = "session_metadata")]
     pub session_metadata: Option<String>,
+    /// Configures the network address to dial to connect to the ngrok service.
+    /// Use this option only if you are connecting to a custom agent ingress.
+    ///
+    /// See the [server_addr parameter in the ngrok docs] for additional details.
+    ///
+    /// [server_addr parameter in the ngrok docs]: https://ngrok.com/docs/ngrok-agent/config#server_addr
+    #[napi(js_name = "server_addr")]
+    pub server_addr: Option<String>,
     /// Unused, use domain instead, will warn and be ignored
     pub subdomain: Option<String>,
     /// Unused, will warn and be ignored

src/connect.rs

@@ -39,6 +39,15 @@ macro_rules! plumb {
     };
 }
 
+/// Single string configuration with result
+macro_rules! plumb_with_result {
+    ($builder:tt, $config:tt, $name:tt, $config_name:tt) => {
+        if let Some(ref $name) = $config.$config_name {
+            $builder.$name($name.clone())?;
+        }
+    };
+}
+
 /// Boolean configuration
 macro_rules! plumb_bool {
     ($builder:tt, $config:tt, $name:tt) => {
@@ -148,6 +157,11 @@ pub fn forward(
     plumb!(s_builder, cfg, authtoken);
     plumb_bool!(s_builder, cfg, authtoken_from_env);
     plumb!(s_builder, cfg, metadata, session_metadata);
+    if let Some(ref ca_cert) = cfg.session_ca_cert {
+        s_builder.ca_cert(Uint8Array::new(ca_cert.as_bytes().to_vec()));
+    }
+    plumb_with_result!(s_builder, cfg, root_cas, root_cas);
+    plumb_with_result!(s_builder, cfg, server_addr, server_addr);
     if let Some(func) = on_connection {
         s_builder.handle_connection(env, func);
     }
@@ -161,9 +175,11 @@ pub fn forward(
 
 /// Connect the session, configure and start the listener
 async fn async_connect(s_builder: SessionBuilder, config: Config) -> Result<Listener> {
+    let force_new_session = config.force_new_session.unwrap_or(false);
+
     // Using a singleton session for connect use cases
     let mut opt = SESSION.lock().await;
-    if opt.is_none() {
+    if opt.is_none() || force_new_session {
         opt.replace(s_builder.connect().await?);
     }
     let session = opt.as_ref().unwrap();

src/session.rs

@@ -213,6 +213,23 @@ impl SessionBuilder {
         Ok(self)
     }
 
+    /// Sets the file path to a default certificate in PEM format to validate ngrok Session TLS connections.
+    /// Setting to "trusted" is the default, using the ngrok CA certificate.
+    /// Setting to "host" will verify using the certificates on the host operating system.
+    /// A client config set via tls_config after calling root_cas will override this value.
+    ///
+    /// Corresponds to the [root_cas parameter in the ngrok docs]
+    ///
+    /// [root_cas parameter in the ngrok docs]: https://ngrok.com/docs/ngrok-agent/config#root_cas
+    #[napi]
+    pub fn root_cas(&mut self, root_cas: String) -> Result<&Self> {
+        let mut builder = self.raw_builder.lock();
+        builder
+            .root_cas(root_cas)
+            .map_err(|e| napi_err(format!("{e}")))?;
+        Ok(self)
+    }
+
     /// Configures the TLS certificate used to connect to the ngrok service while
     /// establishing the session. Use this option only if you are connecting through
     /// a man-in-the-middle or deep packet inspection proxy. Pass in the bytes of the certificate