Maxim Integrated / Mbed OS MAXREFDES155#

DeepCover Embedded Security in IoT: Public-key Secured Data Paths

Dependencies:   MaximInterface

The MAXREFDES155# is an internet-of-things (IoT) embedded-security reference design, built to authenticate and control a sensing node using elliptic-curve-based public-key cryptography with control and notification from a web server.

The hardware includes an ARM® mbed™ shield and attached sensor endpoint. The shield contains a DS2476 DeepCover® ECDSA/SHA-2 coprocessor, Wifi communication, LCD push-button controls, and status LEDs. The sensor endpoint is attached to the shield using a 300mm cable and contains a DS28C36 DeepCover ECDSA/SHA-2 authenticator, IR-thermal sensor, and aiming laser for the IR sensor. The MAXREFDES155# is equipped with a standard Arduino® form-factor shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The combination of these two devices represent an IoT device. Communication to the web server is accomplished with the shield Wifi circuitry. Communication from the shield to the attached sensor module is accomplished over I2C . The sensor module represents an IoT endpoint that generates small data with a requirement for message authenticity/integrity and secure on/off operational control.

The design is hierarchical with each mbed platform and shield communicating data from the sensor node to a web server that maintains a centralized log and dispatches notifications as necessary. The simplicity of this design enables rapid integration into any star-topology IoT network to provide security with the low overhead and cost provided by the ECDSA-P256 asymmetric-key and SHA-256 symmetric-key algorithms.

More information about the MAXREFDES155# is available on the Maxim Integrated website.

WindowManager.hpp@0:33d4e66780c0, 2017-02-24 (annotated)

Committer:
IanBenzMaxim
Date:
Fri Feb 24 11:23:12 2017 -0600
Revision:
0:33d4e66780c0
Child:
7:66c5dedc750b
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 0:33d4e66780c0 1 /*******************************************************************************
IanBenzMaxim 0:33d4e66780c0 2 * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
IanBenzMaxim 0:33d4e66780c0 3 *
IanBenzMaxim 0:33d4e66780c0 4 * Permission is hereby granted, free of charge, to any person obtaining a
IanBenzMaxim 0:33d4e66780c0 5 * copy of this software and associated documentation files (the "Software"),
IanBenzMaxim 0:33d4e66780c0 6 * to deal in the Software without restriction, including without limitation
IanBenzMaxim 0:33d4e66780c0 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
IanBenzMaxim 0:33d4e66780c0 8 * and/or sell copies of the Software, and to permit persons to whom the
IanBenzMaxim 0:33d4e66780c0 9 * Software is furnished to do so, subject to the following conditions:
IanBenzMaxim 0:33d4e66780c0 10 *
IanBenzMaxim 0:33d4e66780c0 11 * The above copyright notice and this permission notice shall be included
IanBenzMaxim 0:33d4e66780c0 12 * in all copies or substantial portions of the Software.
IanBenzMaxim 0:33d4e66780c0 13 *
IanBenzMaxim 0:33d4e66780c0 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
IanBenzMaxim 0:33d4e66780c0 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
IanBenzMaxim 0:33d4e66780c0 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IanBenzMaxim 0:33d4e66780c0 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
IanBenzMaxim 0:33d4e66780c0 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
IanBenzMaxim 0:33d4e66780c0 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
IanBenzMaxim 0:33d4e66780c0 20 * OTHER DEALINGS IN THE SOFTWARE.
IanBenzMaxim 0:33d4e66780c0 21 *
IanBenzMaxim 0:33d4e66780c0 22 * Except as contained in this notice, the name of Maxim Integrated
IanBenzMaxim 0:33d4e66780c0 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
IanBenzMaxim 0:33d4e66780c0 24 * Products, Inc. Branding Policy.
IanBenzMaxim 0:33d4e66780c0 25 *
IanBenzMaxim 0:33d4e66780c0 26 * The mere transfer of this software does not imply any licenses
IanBenzMaxim 0:33d4e66780c0 27 * of trade secrets, proprietary technology, copyrights, patents,
IanBenzMaxim 0:33d4e66780c0 28 * trademarks, maskwork rights, or any other form of intellectual
IanBenzMaxim 0:33d4e66780c0 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
IanBenzMaxim 0:33d4e66780c0 30 * ownership rights.
IanBenzMaxim 0:33d4e66780c0 31 *******************************************************************************/
IanBenzMaxim 0:33d4e66780c0 32
IanBenzMaxim 0:33d4e66780c0 33 #ifndef WINDOWMANAGER_HPP
IanBenzMaxim 0:33d4e66780c0 34 #define WINDOWMANAGER_HPP
IanBenzMaxim 0:33d4e66780c0 35
IanBenzMaxim 0:33d4e66780c0 36 #include <vector>
IanBenzMaxim 0:33d4e66780c0 37 #include "Bitmap.hpp"
IanBenzMaxim 0:33d4e66780c0 38 #include "Keys.hpp"
IanBenzMaxim 0:33d4e66780c0 39 #include "Window.hpp"
IanBenzMaxim 0:33d4e66780c0 40
IanBenzMaxim 0:33d4e66780c0 41 /// Stack based window manager.
IanBenzMaxim 0:33d4e66780c0 42 class WindowManager
IanBenzMaxim 0:33d4e66780c0 43 {
IanBenzMaxim 0:33d4e66780c0 44 public:
IanBenzMaxim 0:33d4e66780c0 45 /// @param width Width of the windows to render.
IanBenzMaxim 0:33d4e66780c0 46 /// @param height Height of the windows to render.
IanBenzMaxim 0:33d4e66780c0 47 WindowManager(int width, int height) : m_width(width), m_height(height) { }
IanBenzMaxim 0:33d4e66780c0 48 ~WindowManager();
IanBenzMaxim 0:33d4e66780c0 49
IanBenzMaxim 0:33d4e66780c0 50 /// Push a window onto the top of the stack.
IanBenzMaxim 0:33d4e66780c0 51 /// @details The operation will be queued until the next update.
IanBenzMaxim 0:33d4e66780c0 52 /// @param window Heap allocated object that WindowManager will take ownership of.
IanBenzMaxim 0:33d4e66780c0 53 void push(Window * window);
IanBenzMaxim 0:33d4e66780c0 54
IanBenzMaxim 0:33d4e66780c0 55 /// Pop a window from the top of the stack.
IanBenzMaxim 0:33d4e66780c0 56 /// @details The operation will be queued until the next update. The popped window will be deleted.
IanBenzMaxim 0:33d4e66780c0 57 void pop();
IanBenzMaxim 0:33d4e66780c0 58
IanBenzMaxim 0:33d4e66780c0 59 /// Renders the top window as a bitmap.
IanBenzMaxim 0:33d4e66780c0 60 Bitmap render() const;
IanBenzMaxim 0:33d4e66780c0 61
IanBenzMaxim 0:33d4e66780c0 62 /// Updates all windows.
IanBenzMaxim 0:33d4e66780c0 63 /// @returns True if the screen should be redrawn or false if it does not need to be redrawn.
IanBenzMaxim 0:33d4e66780c0 64 /// Only the top window can request a screen redraw.
IanBenzMaxim 0:33d4e66780c0 65 bool update();
IanBenzMaxim 0:33d4e66780c0 66
IanBenzMaxim 0:33d4e66780c0 67 /// Forwards a key-press input event to the top window for processing.
IanBenzMaxim 0:33d4e66780c0 68 void processKey(Key key);
IanBenzMaxim 0:33d4e66780c0 69
IanBenzMaxim 0:33d4e66780c0 70 private:
IanBenzMaxim 0:33d4e66780c0 71 void processAction(Window * window);
IanBenzMaxim 0:33d4e66780c0 72
IanBenzMaxim 0:33d4e66780c0 73 int m_width;
IanBenzMaxim 0:33d4e66780c0 74 int m_height;
IanBenzMaxim 0:33d4e66780c0 75 std::vector<Window *> m_windowStack;
IanBenzMaxim 0:33d4e66780c0 76 std::vector<Window *> m_actionQueue;
IanBenzMaxim 0:33d4e66780c0 77
IanBenzMaxim 0:33d4e66780c0 78 // Uncopyable
IanBenzMaxim 0:33d4e66780c0 79 WindowManager(const WindowManager &);
IanBenzMaxim 0:33d4e66780c0 80 const WindowManager & operator=(const WindowManager &);
IanBenzMaxim 0:33d4e66780c0 81 };
IanBenzMaxim 0:33d4e66780c0 82
IanBenzMaxim 0:33d4e66780c0 83 #endif