Hello, I noticed the discussion about STIR/SHAKEN that happened on this forum a few weeks ago and for quite some time I had in my todo list the task to add support for those extensions to Kamailio SIP server, but with no real pressure to deploy them here in Europe, I kept postponing for a while (also, some people did it already for Kamailio using embedded scripting languages Lua or Python). Anyhow, as I saw the discussion here, it became fresh again and I searched the web, but I could not find any free/open tools to test/validate implementations, so it looked a bit like chicken-egg problem, therefore I created recently such a project, written in Go language, with option to build a C static or shared library. It is still very fresh code, not much tested, now with ES256 signing algorithm based on golang native support, no interoperability done with other applications. The project is available at: ? * https://github.com/asipto/secsipidx To be able to enable older versions of PBX/SIP servers to support STIR/SHAKEN extensions, besides the C library exports, there is an application that can run as CLI tool or HTTP API server to check or generate Identity headers. I haven't tested at all on Windows, but I expect that golang ensures good portability, not using anything OS specific in the code. I thought it worth announcing it here, in case someone wants to play with, suggest improvements or even contribute to make it easier to use on their specific deployments. Cheers, Daniel -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 9-11, 2020, Berlin - www.asipto.com Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com