Add gnubby authentication to remoting host

remoting/host/desktop_environment.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_HOST_DESKTOP_ENVIRONMENT_H_
 #define REMOTING_HOST_DESKTOP_ENVIRONMENT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace webrtc {
 class ScreenCapturer;
 }  // namespace webrtc
 
 namespace remoting {
 
+namespace protocol {
+class ClientStub;
+}  // namespace protocol
+
 class AudioCapturer;
 class ClientSessionControl;
+class GnubbyAuthHandler;
 class InputInjector;
 class ScreenControls;
 
 // Provides factory methods for creation of audio/video capturers and event
 // executor for a given desktop environment.
 class DesktopEnvironment {
  public:
   virtual ~DesktopEnvironment() {}
 
   // Factory methods used to create audio/video capturers, event executor, and
   // screen controls object for a particular desktop environment.
   virtual scoped_ptr<AudioCapturer> CreateAudioCapturer() = 0;
   virtual scoped_ptr<InputInjector> CreateInputInjector() = 0;
   virtual scoped_ptr<ScreenControls> CreateScreenControls() = 0;
   virtual scoped_ptr<webrtc::ScreenCapturer> CreateVideoCapturer() = 0;
 
   // Returns the set of all capabilities supported by |this|.
   virtual std::string GetCapabilities() const = 0;
 
   // Passes the final set of capabilities negotiated between the client and host
   // to |this|.
   virtual void SetCapabilities(const std::string& capabilities) = 0;
+
+  // Factory method to create a gnubby auth handler suitable for the particular
+  // desktop environment.
+  virtual scoped_ptr<GnubbyAuthHandler> CreateGnubbyAuthHandler(
+      protocol::ClientStub* client_stub) = 0;
 };
 
 // Used to create |DesktopEnvironment| instances.
 class DesktopEnvironmentFactory {
  public:
   virtual ~DesktopEnvironmentFactory() {}
 
   // Creates an instance of |DesktopEnvironment|. Returns a NULL pointer if
   // the desktop environment could not be created for any reason (if the curtain
   // failed to active for instance). |client_session_control| must outlive
   // the created desktop environment.
   virtual scoped_ptr<DesktopEnvironment> Create(
       base::WeakPtr<ClientSessionControl> client_session_control) = 0;
 
   // Enables or disables the curtain mode.
   virtual void SetEnableCurtaining(bool enable) {}
 
   // Returns |true| if created |DesktopEnvironment| instances support audio
   // capture.
   virtual bool SupportsAudioCapture() const = 0;
+
+  // Enables or disables gnubby authentication.
+  virtual void SetEnableGnubbyAuth(bool enable) {}
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_DESKTOP_ENVIRONMENT_H_