Chromoting: Implemented security attention sequence (SAS) emulation on Windows.

remoting/host/event_executor_win.cc

Index: remoting/host/event_executor_win.cc
diff --git a/remoting/host/event_executor_win.cc b/remoting/host/event_executor_win.cc
index b1f58427f4c01799147294faa6b264b37c15ac0d..87fb4656810c07cf6fd5f16afdd9adea9cdd188e 100644
--- a/remoting/host/event_executor_win.cc
+++ b/remoting/host/event_executor_win.cc
@@ -9,10 +9,13 @@
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
+#include "ipc/ipc_channel_proxy.h"
 #include "remoting/host/capturer.h"
 #include "remoting/proto/event.pb.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 
+#include "remoting/host/chromoting_session_messages.h"
+
 namespace remoting {
 
 using protocol::MouseEvent;
@@ -20,10 +23,15 @@ using protocol::KeyEvent;
 
 namespace {
 
+// Name of the chromoting service IPC channel.
+const char kChromotingSessionChannelName[] = "chromoting_session";
+
 // A class to generate events on Windows.
 class EventExecutorWin : public EventExecutor {
  public:
-  EventExecutorWin(MessageLoop* message_loop, Capturer* capturer);
+  EventExecutorWin(MessageLoop* message_loop,
+                   IPC::ChannelProxy* chromoting_session,
+                   Capturer* capturer);
   virtual ~EventExecutorWin() {}
 
   virtual void InjectKeyEvent(const KeyEvent& event) OVERRIDE;
@@ -36,13 +44,21 @@ class EventExecutorWin : public EventExecutor {
   MessageLoop* message_loop_;
   Capturer* capturer_;
 
+  // IPC channel connecting the host with the chromoting service.
+  IPC::ChannelProxy* chromoting_session_;
+
+  bool scroll_pressed_;
+
   DISALLOW_COPY_AND_ASSIGN(EventExecutorWin);
 };
 
 EventExecutorWin::EventExecutorWin(MessageLoop* message_loop,
+                                   IPC::ChannelProxy* chromoting_session,
                                    Capturer* capturer)
     : message_loop_(message_loop),
-      capturer_(capturer) {
+      capturer_(capturer),
+      chromoting_session_(chromoting_session),
+      scroll_pressed_(false) {
 }
 
 void EventExecutorWin::InjectKeyEvent(const KeyEvent& event) {
@@ -54,6 +70,22 @@ void EventExecutorWin::InjectKeyEvent(const KeyEvent& event) {
     return;
   }
 
+  // Poor man's Ctrl+Alt+Delete emulation: a double Scroll Lock is converted to
+  // the security attention sequence.
+  // TODO(alexeypa): replace this with proper SAS handling.
+  if (chromoting_session_ != NULL && event.keycode() == VK_SCROLL) {
+    if (event.pressed()) {
+      if (scroll_pressed_) {
+        chromoting_session_->Send(new ChromotingSessionMsg_SendSasToConsole());
+        scroll_pressed_ = false;
+      } else {
+        scroll_pressed_ = true;
+      }
+    }
+  } else {
+    scroll_pressed_ = false;
+  }
+
   HandleKey(event);
 }
 
@@ -168,8 +200,9 @@ void EventExecutorWin::HandleMouse(const MouseEvent& event) {
 }  // namespace
 
 EventExecutor* EventExecutor::Create(MessageLoop* message_loop,
+                                     IPC::ChannelProxy* chromoting_session,
                                      Capturer* capturer) {
-  return new EventExecutorWin(message_loop, capturer);
+  return new EventExecutorWin(message_loop, chromoting_session, capturer);
 }
 
 }  // namespace remoting