Start Milestone 4 interactive SSH terminal and host-key flow

src/ssh_session_backend.h

@@ -19,11 +19,14 @@ public slots:
     void connectSession(const SessionConnectOptions& options) override;
     void disconnectSession() override;
     void reconnectSession(const SessionConnectOptions& options) override;
+    void sendInput(const QString& input) override;
+    void confirmHostKey(bool trustHost) override;
 
 private slots:
     void onProcessStarted();
     void onProcessErrorOccurred(QProcess::ProcessError error);
     void onProcessFinished(int exitCode, QProcess::ExitStatus exitStatus);
+    void onReadyReadStandardOutput();
     void onReadyReadStandardError();
     void onConnectedProbeTimeout();
 
@@ -34,15 +37,14 @@ private:
     bool m_userInitiatedDisconnect;
     bool m_reconnectPending;
     SessionConnectOptions m_reconnectOptions;
+    SessionConnectOptions m_activeOptions;
     QString m_lastRawError;
-    QString m_askPassScriptPath;
+    bool m_waitingForPasswordPrompt;
+    bool m_waitingForHostKeyConfirmation;
+    bool m_passwordSubmitted;
 
     void setState(SessionState state, const QString& message);
     bool startSshProcess(const SessionConnectOptions& options);
-    bool configureAskPass(const SessionConnectOptions& options,
-                          QProcessEnvironment& environment,
-                          QString& error);
-    void cleanupAskPassScript();
     QString mapSshError(const QString& rawError) const;
     QString knownHostsFileForNullDevice() const;
 };