PIOT-CDA-10-005: Add DTLS support to your CoapClientConnector (optional and incomplete)

[labbenchstudios]

Description

• Update the CoapClientConnector module to support DTLS.
  • NOTE: These instructions reference the following CoAP library:
  • The aiocoap open source CoAP library, located at: aiocoap. Reference: Amsüss, Christian and Wasilak, Maciej. aiocoap: Python CoAP Library. Energy Harvesting Solutions, 2013–. http://github.com/chrysn/aiocoap/.

Review the README

• Please see README.md for further information on, and use of, this content.
• License for embedded documentation and source codes: PIOT-DOC-LIC

Estimated effort may vary greatly

• The estimated level of effort for this exercise shown in the 'Estimate' section below is a very rough approximation. The actual level of effort may vary greatly depending on your development and test environment, experience with the requisite technologies, and many other factors.

Actions

NOTE: This is an optional and as-of-yet incomplete exercise and will be updated with further detail at a later time. It is currently out of scope for Programming the Internet of Things.

• Review aiocoap - The Python CoAP library for further information on enabling DTLS with your CoapClientConnector module.
  • As of this writing, according to the documentation at https://aiocoap.readthedocs.io/en/latest/module/aiocoap.transports.tinydtls.html, this functionality is still highly experimental.

Estimate

• Medium

Tests

• Once the GDA CoAP server is updated to support DTLS, encryption can be enabled via the PiotConfig.props configuration by setting 'enableCrypt = True' and incorporating any additional certificate and key load parameters and functionality necessary to establish a DTLS handshake between the two systems.