Add keyboard-interactive handler

index.js

@@ -35,11 +35,15 @@ async function createServer(options) {
     });
 }
 
-async function createSSHConnection(config) {
+async function createSSHConnection(config, keyboardInteractiveHandler) {
     return new Promise(function (resolve, reject) {
         let conn = new Client();
         conn.on('ready', () => resolve(conn));
         conn.on('error', reject);
+        // It should be set before connect().
+        if (keyboardInteractiveHandler){
+            conn.on('keyboard-interactive', keyboardInteractiveHandler);
+        }
         conn.connect(config);
     });
 }
@@ -58,7 +62,7 @@ async function createTunnel( tunnelOptions, serverOptions, sshOptions, forwardOp
     return new Promise(async function (resolve, reject) {
 
         try {
-            sshConnection = await createSSHConnection(sshOptionslocal);
+            sshConnection = await createSSHConnection(sshOptionslocal, tunnelOptionsLocal.keyboardInteractiveHandler);
             addListenerSshConnection(sshConnection);
         } catch (e) {
             if (server) {

types/index.d.ts

@@ -36,6 +36,18 @@ export interface TunnelOptions {
    * @default false
   */
   reconnectOnError: boolean;
+  /*
+   * specifies handler for keyboard-interactive authentication
+   * @default undefined
+   * @see https://www.npmjs.com/package/ssh2?activeTab=readme#client-events
+  */
+  keyboardInteractiveHandler?: (
+    name: string,
+    instructions: string,
+    instructionsLang: string,
+    prompts: { prompt: string; echo: boolean }[],
+    finish: (responses: string[]) => void
+  ) => void;
 }
 
 /**