Thanks for your kind words. This sounds like a very cool project!

We have examples of setting up wolfTPM to establish a TLS connection:
https://github.com/wolfSSL/wolfTPM/tree … amples/tls

wolfMQTT would then be able to use that connection natively:
https://github.com/wolfSSL/wolfMQTT/tre … mqttclient

I'd recommend sending an email to our support channel. This will allow us to better prioritize any questions you might have.
support@wolfssl.com

Kind regards,
Eric @ wolfSSL Support

Iḿ really impressed with overall wolfSSL tools, they are easy to use and very handy. We are exploring the options to establish a MQTT session but using a TPM to perform authentication at TLS start.
The goal would be to make the TPM work as in this example with OpenSSL:
$ openssl s_client -cert client.crt -key client.key -CAfile caFile.crt -keyform engine -engine tpm2tss -connect localhost:8444

As you can see here Openssl try to set up a TLS session using the TPM as the element that perform the POP test using the tpm2tss engine.

I've looking in the PAHO C API but I cannot find anything similar.

Thanks in advance!