Hello, Here is some more information about it:
* We used Contiki as the base/OS for the code. More specifically, we forked from the 6lbr project (https://github.com/cetic/6lbr), as that version already had some code for handling DTLS connections and AES encryption in it. * We are using the TI CC2538dk board as our constrained target platform. * The implementation has support for the DTLS profile, using pre-shared keys, as this was enough for our use case. * The implementation handles CWT tokens. * We modified the Erbium CoAP server in 6lbr to be able to simultaneously listen for CoAP and CoAPs connections (using TinyDTLS underneath). * The implementation uses the cn-cbor library for decoding CBOR data. * The implementation supports receiving tokens at the authz-info endpoint, and then giving access to a couple of sample resources based on the claims from the received tokens. * The implementation has some additional optional features related to our disadvantaged network environments, such as bootstrapping of the PSK credentials, and detecting revoked tokens through introspection. * The current binary is around 300 kb, which is good enough for the 512 kb flash on the TI boards, though it may be a bit too large for a class II device. We can probably make it a bit smaller. In terms of RAM, it fits in the 32 KB available on the TI boards. Best, --- Sebastian Echeverria Tactical Technologies Group (TTG) Software Engineering Institute Carnegie Mellon University From: Hannes Tschofenig <hannes.tschofe...@arm.com> Date: Monday, January 28, 2019 at 5:05 AM To: Grace Lewis <gle...@sei.cmu.edu>, "ace@ietf.org" <ace@ietf.org> Subject: RE: ACE Implementation for Disadvantaged Environments Congrats to the work. Could you say a little bit the (constrained) resource server implementation? Ciao Hannes From: Ace <ace-boun...@ietf.org> On Behalf Of Grace A Lewis Sent: Mittwoch, 23. Januar 2019 19:12 To: ace@ietf.org Subject: [Ace] ACE Implementation for Disadvantaged Environments Hello, I just wanted to make the group aware of our ACE implementation (SEI-ACE), which includes an implementation for a resource-constrained server. Details available in this news article: https://www.sei.cmu.edu/news-events/news/article.cfm?assetid=539184 Article includes the link to our Git repo. Enjoy! - Grace Lewis ______________________________________________ Grace A. Lewis, Ph.D. Principal Researcher and TTG Initiative Lead Carnegie Mellon Software Engineering Institute Software Solutions Division (SSD) Tactical Technologies Group (TTG) 4500 Fifth Ave. #5412 Pittsburgh, PA 15213 Phone: (412) 268-5851 http://www.sei.cmu.edu/staff/glewis “A change in perspective is worth 80 IQ points” --- Alan Kay IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
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