Maxim Integrated / Mbed 2 deprecated DeepCover Embedded Security in IoT

MAXREFDES143#: DeepCover Embedded Security in IoT Authenticated Sensing & Notification

Dependencies:   MaximInterface mbed

The MAXREFDES143# is an Internet of Things (IoT) embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. The hardware includes a peripheral module representing a protected sensor node monitoring operating temperature and remaining life of a filter (simulated through ambient light sensing) and an mbed shield representing a controller node responsible for monitoring one or more sensor nodes. The design is hierarchical with each controller node communicating data from connected sensor nodes to a web server that maintains a centralized log and dispatches notifications as necessary. The mbed shield contains a Wi-Fi module, a DS2465 coprocessor with 1-Wire® master function, an LCD, LEDs, and pushbuttons. The protected sensor node contains a DS28E15 authenticator, a DS7505 temperature sensor, and a MAX44009 light sensor. The mbed shield communicates to a web server by the onboard Wi-Fi module and to the protected sensor node with I2C and 1-Wire. The MAXREFDES143# is equipped with a standard shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The simplicity of this design enables rapid integration into any star-topology IoT network requiring the heightened security with low overhead provided by the SHA-256 symmetric-key algorithm.

More information about the MAXREFDES143# is available on the Maxim Integrated website.

diff -r 434330962308 -r 37ea43ff81be SensorNode.cpp
--- a/SensorNode.cpp	Wed Oct 19 13:23:41 2016 -0500
+++ b/SensorNode.cpp	Fri Dec 16 10:47:34 2016 -0600
@@ -32,7 +32,7 @@
 */
 
 #include "SensorNode.hpp"
-#include "common.hpp"
+#include "SensorData.hpp"
 #include "Masters/DS2465/DS2465.h"
 #include "RomId/RomCommands.h"
 #include "I2C.h"
@@ -82,9 +82,9 @@
   DS28E15_22_25::Page pageData;
   
   // Create constant partial secret
-  std::memset(scratchpad, defaultPaddingByte, scratchpad.length);
+  scratchpad.fill(uint8_t(defaultPaddingByte));
   // Read page data
-  bool result = (ds2465.readMemory(DS2465::UserMemoryPage0, pageData, pageData.length, false) == OneWireMaster::Success);
+  bool result = (ds2465.readMemory(DS2465::UserMemoryPage0, pageData.data(), pageData.size(), false) == OneWireMaster::Success);
   // Calculate secret
   if (result)
   {
@@ -132,7 +132,7 @@
 #else
   std::srand(userEntropy);
 #endif
-  for (size_t i = 0; i < challenge.length; i++)
+  for (size_t i = 0; i < challenge.size(); i++)
   {
 #ifdef TARGET_MAX32600
     challenge[i] = MXC_TPU->prng_rnd_num;