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.

--- a/WebServerInterface.cpp	Tue Apr 19 21:20:52 2016 +0000
+++ b/WebServerInterface.cpp	Wed Apr 20 09:49:25 2016 -0500
@@ -60,9 +60,10 @@
 /// @returns True on success.
 static bool setHttpPostSecret(ISha256MacCoprocessor & MacCoproc)
 {
-  ISha256MacCoprocessor::DevicePage fillData;
-  std::memset(fillData, defaultPaddingByte, fillData.length);
-  return (MacCoproc.computeSlaveSecret(fillData, fillData, reinterpret_cast<ISha256MacCoprocessor::SlaveSecretData &>(fillData)) == ISha256MacCoprocessor::Success);
+  ISha256MacCoprocessor::DevicePage::Buffer fillData;
+  std::memset(fillData, defaultPaddingByte, ISha256MacCoprocessor::DevicePage::length);
+  // static_assert(ISha256MacCoprocessor::DevicePage::length > ISha256MacCoprocessor::SlaveSecretData::length);
+  return (MacCoproc.computeSlaveSecret(fillData, fillData, reinterpret_cast<const ISha256MacCoprocessor::SlaveSecretData::Buffer &>(fillData)) == ISha256MacCoprocessor::Success);
 }
 
 WebServerInterface::WebServerInterface(ESP8266 & esp8266, mbed::Serial * pc)