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

remoting/host/sas_sender_win.h

Index: remoting/host/sas_sender_win.h
diff --git a/remoting/host/sas_sender_win.h b/remoting/host/sas_sender_win.h
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+// 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_SAS_SENDER_WIN_H_
+#define REMOTING_HOST_SAS_SENDER_WIN_H_
+
+#include <windows.h>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace remoting {
+
+// Provides a way to emulate secure attention sequence (SAS). The default
+// sequence is Ctrl+Alt+Delete.

[Wez, 2012/03/07 01:56:13]

nit: What does it mean for the default sequence to be C-A-D?

[alexeypa (please no reviews), 2012/03/07 19:59:08]

It implies that there are other SASs such as inserting a smart card or a
notification from a biometric device.

[Wez, 2012/03/08 00:01:33]

I'm not sure what you mean - regardless of whether it's generated by a biometric
device or C-A-D it's a Secure Attention Sequence, so in what sense are we
generating a C-A-D?

Or are you just trying to clarify what is meant by Secure Attention Sequence?

[alexeypa (please no reviews), 2012/03/08 01:52:54]

The latter.

+class SasSender {

[Wez, 2012/03/07 01:56:13]

nit: For other input we have EventInjector, so perhaps this would better be
named SasInjector?  (Also SasSender sounds like it might be the IPC send end of
the SAS event)

[alexeypa (please no reviews), 2012/03/07 19:59:08]

Done.

+ public:
+  virtual ~SasSender() {}
+
+  // Sends the secure attention sequence to the console session.
+  virtual bool Send() = 0;

[Wez, 2012/03/07 01:56:13]

nit: Send -> SendSAS / InjectSAS?

[alexeypa (please no reviews), 2012/03/07 19:59:08]

InjectSAS

+
+  static scoped_ptr<SasSender> Create();

[Wez, 2012/03/07 01:56:13]

nit: Clarify that Create can return NULL if SendSAS() is not supported on the
platform?

[alexeypa (please no reviews), 2012/03/07 19:59:08]

Done.

+};
+
+}  // namespace remoting
+
+#endif REMOTING_HOST_SAS_SENDER_WIN_H_