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.

src/DisplayIdWindow.cpp@17:5926077e5345, 2019-10-04 (annotated)

Committer:
IanBenzMaxim
Date:
Fri Oct 04 12:10:11 2019 -0500
Revision:
17:5926077e5345
Parent:
16:a004191a79ab 
Set pin maps through the mbed configuration system. Added support for MAX32625MBED target. Updated mbed-os to version 5.7.7 for MAX32625 I2C fixes. Consolidated simplelink hook definitions.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 0:33d4e66780c0 1 /*******************************************************************************
IanBenzMaxim 16:a004191a79ab 2 * Copyright (C) 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 #include <string>
IanBenzMaxim 16:a004191a79ab 34 #include "DisplayIdWindow.hpp"
IanBenzMaxim 16:a004191a79ab 35 #include "InitWindow.hpp"
IanBenzMaxim 13:6a6225690c2e 36 #include "MakeFunction.hpp"
IanBenzMaxim 0:33d4e66780c0 37 #include "Text.hpp"
IanBenzMaxim 16:a004191a79ab 38 #include "WifiConnectWindow.hpp"
IanBenzMaxim 0:33d4e66780c0 39 #include "WindowManager.hpp"
IanBenzMaxim 0:33d4e66780c0 40
IanBenzMaxim 0:33d4e66780c0 41 extern std::string webId;
IanBenzMaxim 0:33d4e66780c0 42
IanBenzMaxim 16:a004191a79ab 43 DisplayIdWindow::DisplayIdWindow(Mode mode) {
IanBenzMaxim 16:a004191a79ab 44 backButton.setParent(this);
IanBenzMaxim 16:a004191a79ab 45 backButton.setText("Back");
IanBenzMaxim 16:a004191a79ab 46 backButton.setClickedHandler(
IanBenzMaxim 16:a004191a79ab 47 makeFunction(this, &DisplayIdWindow::backButtonClicked));
IanBenzMaxim 16:a004191a79ab 48 switch (mode) {
IanBenzMaxim 13:6a6225690c2e 49 case PreConnectMode:
IanBenzMaxim 16:a004191a79ab 50 continueButton.setParent(this);
IanBenzMaxim 16:a004191a79ab 51 continueButton.setText("Continue");
IanBenzMaxim 16:a004191a79ab 52 continueButton.setClickedHandler(
IanBenzMaxim 16:a004191a79ab 53 makeFunction(this, &DisplayIdWindow::continueButtonClicked));
IanBenzMaxim 16:a004191a79ab 54 continueButton.setFocused();
IanBenzMaxim 13:6a6225690c2e 55 break;
IanBenzMaxim 13:6a6225690c2e 56
IanBenzMaxim 13:6a6225690c2e 57 case PopupMode:
IanBenzMaxim 16:a004191a79ab 58 backButton.setFocused();
IanBenzMaxim 13:6a6225690c2e 59 break;
IanBenzMaxim 13:6a6225690c2e 60 }
IanBenzMaxim 0:33d4e66780c0 61 }
IanBenzMaxim 0:33d4e66780c0 62
IanBenzMaxim 13:6a6225690c2e 63 void DisplayIdWindow::doRender(Bitmap & bitmap, int xOffset,
IanBenzMaxim 13:6a6225690c2e 64 int yOffset) const {
IanBenzMaxim 13:6a6225690c2e 65 Text description;
IanBenzMaxim 13:6a6225690c2e 66 description.setText("Web ID: " + webId);
IanBenzMaxim 13:6a6225690c2e 67 description.setWordWrap(true);
IanBenzMaxim 13:6a6225690c2e 68 description.resize(width(), height());
IanBenzMaxim 13:6a6225690c2e 69 description.render(bitmap, xOffset + x(), yOffset + y());
IanBenzMaxim 16:a004191a79ab 70 Window::doRender(bitmap, xOffset, yOffset);
IanBenzMaxim 8:a0d75dff3c9b 71 }
IanBenzMaxim 8:a0d75dff3c9b 72
IanBenzMaxim 13:6a6225690c2e 73 void DisplayIdWindow::resized() {
IanBenzMaxim 16:a004191a79ab 74 backButton.resize(backButton.preferredWidth(),
IanBenzMaxim 16:a004191a79ab 75 backButton.preferredHeight());
IanBenzMaxim 16:a004191a79ab 76 backButton.move(0, height() - backButton.height());
IanBenzMaxim 16:a004191a79ab 77 continueButton.resize(continueButton.preferredWidth(),
IanBenzMaxim 16:a004191a79ab 78 continueButton.preferredHeight());
IanBenzMaxim 16:a004191a79ab 79 continueButton.move(width() - continueButton.width(),
IanBenzMaxim 16:a004191a79ab 80 height() - continueButton.height());
IanBenzMaxim 16:a004191a79ab 81 }
IanBenzMaxim 16:a004191a79ab 82
IanBenzMaxim 16:a004191a79ab 83 bool DisplayIdWindow::doProcessKey(Key key) {
IanBenzMaxim 16:a004191a79ab 84 bool handled;
IanBenzMaxim 16:a004191a79ab 85 switch (key) {
IanBenzMaxim 16:a004191a79ab 86 case LeftKey:
IanBenzMaxim 16:a004191a79ab 87 backButton.setFocused();
IanBenzMaxim 16:a004191a79ab 88 handled = true;
IanBenzMaxim 16:a004191a79ab 89 break;
IanBenzMaxim 16:a004191a79ab 90
IanBenzMaxim 16:a004191a79ab 91 case RightKey:
IanBenzMaxim 16:a004191a79ab 92 continueButton.setFocused();
IanBenzMaxim 16:a004191a79ab 93 handled = true;
IanBenzMaxim 16:a004191a79ab 94 break;
IanBenzMaxim 16:a004191a79ab 95
IanBenzMaxim 16:a004191a79ab 96 default:
IanBenzMaxim 16:a004191a79ab 97 handled = false;
IanBenzMaxim 16:a004191a79ab 98 break;
IanBenzMaxim 16:a004191a79ab 99 }
IanBenzMaxim 16:a004191a79ab 100 return handled;
IanBenzMaxim 16:a004191a79ab 101 }
IanBenzMaxim 16:a004191a79ab 102
IanBenzMaxim 16:a004191a79ab 103 void DisplayIdWindow::backButtonClicked(Button *) {
IanBenzMaxim 16:a004191a79ab 104 if (windowManager()) {
IanBenzMaxim 16:a004191a79ab 105 windowManager()->pop();
IanBenzMaxim 16:a004191a79ab 106 if (continueButton.parent()) {
IanBenzMaxim 16:a004191a79ab 107 std::auto_ptr<Window> window(new InitWindow(InitWindow::MenuMode));
IanBenzMaxim 16:a004191a79ab 108 windowManager()->push(window);
IanBenzMaxim 16:a004191a79ab 109 }
IanBenzMaxim 16:a004191a79ab 110 }
IanBenzMaxim 0:33d4e66780c0 111 }
IanBenzMaxim 0:33d4e66780c0 112
IanBenzMaxim 13:6a6225690c2e 113 void DisplayIdWindow::continueButtonClicked(Button *) {
IanBenzMaxim 16:a004191a79ab 114 if (windowManager()) {
IanBenzMaxim 16:a004191a79ab 115 windowManager()->pop();
IanBenzMaxim 16:a004191a79ab 116 std::auto_ptr<Window> window(new WifiConnectWindow);
IanBenzMaxim 16:a004191a79ab 117 windowManager()->push(window);
IanBenzMaxim 13:6a6225690c2e 118 }
IanBenzMaxim 0:33d4e66780c0 119 }