Hi Olaf,

Welcome to Iotivity!!  Nice to see your message in our part of the woods :)

Chul,
Can we generate anonymous cipher suite patch against the sourceforge tinydtls 
master and attach to our ticket?

Regarding AES rounds to 14:
I think when Randeep had added support for Arduino in rijndael.c/.h, he may 
have wanted to test the AES implementation with 256 bit keys (which does 
require 14 rounds). Randeep can confirm.

Thanks
Sachin
503-264-8071


-----Original Message-----
From: Olaf Bergmann [mailto:[email protected]]
Sent: Friday, April 03, 2015 5:07 AM
To: iotivity-dev at lists.iotivity.org
Cc: Agrawal, Sachin; Macieira, Thiago
Subject: tinydtls in iotivity

Hello all,

I just wanted to introduce myself to this list as I have just subscribed and 
did not yet followed the details of iotivity development.  I am the maintainer 
of tinydtls and would be glad to working with you guys on making tinydtls 
useful for you. You can help improving the tinydtls development process by 
commenting on the eclipse proposal at 
<https://projects.eclipse.org/proposals/tinydtls> (if you think that this is a 
good idea please speak up; if not, speak up as well).

Regarding the use of tinydtls in iotivity, I was pointed to this discussion on 
open tinydtls tickets:

 <http://lists.iotivity.org/pipermail/iotivity-dev/2015-April/000813.html>
 <http://lists.iotivity.org/pipermail/iotivity-dev/2015-April/000814.html>

Indeed, I was not aware that there is proposed code for 
TLS_ECDH_anon_WITH_AES_128_CBC_SHA (ticket 17). Can I ask you to provide a 
patch set for this?

The patch provided for ticket 16 (rijndael for arduino) looks ok but needs 
some tweaks for other platforms. May I ask you why you have set the number of 
rounds to 14 (AES-128 is ten rounds, IIRC)?

Thanks
Olaf
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