Placement of Certification Declaration (DC) - MATTER

[Jenzo]

Hi Nordic,

We have read about 'Storing Certification Declaration in firmware' and we have also read case ID: 309896.

However it is not clear to us where we need to store the certificate for production purposes.

We would prefer to store the certificate in Zephyr. 

Thanks.

[Maria Gilje]

Hello,

Like the Storing Certification Declaration in Zephyr section in the Storing Certification Declaration in firmware documentation states, the CD can be stored in the Zephyr Settings subsystem through CLI or through Zephyr's API in the firmware. Is the documentation not clear enough to answer where you should store the CD?

Best regards,

Maria

[Jenzo]

Hi Maria,

No, it is not clear.

We believe that we will receive a certificate in a PEM format from CSA, which we needs to store somewhere in SDK file directory and the PEM will be incorporated into the program firmware, right?

If so, where in the SDK file directory do we need to store it?

Regards

Jens

[Jenzo]

correct!

[Maria Gilje]

Good that Method 1 is now building successfully. This is the recommended method, so please revert the changes related to Method 2.

Regarding the unauthorized device issue:

Please check that the Vendor ID and Product ID in the CD matches the VID and PID in your Device Attestation Certification (DAC).

Also, where do you get the error message? From a commercial Matter ecosystem controller?

[Jenzo]

Yes, I get the error message from an Apple Homepod - using Apple Home on an iPhone.

[Jenzo]

Just checked one certificate and it is the right VID and PID.

Subject: CN = Mvid:141D Mpid:0111

[Maria Gilje]

Jenzo said:

Yes, I get the error message from an Apple Homepod - using Apple Home on an iPhone.

Is your CD meant for testing at an Authorized Test Lab (ATL)? If so, your device will not show up as certified on commercial ecosystems. The device will only show up as certified on commercial ecosystems after passing ATL testing.

Do you have a production DAC which points to the Distibuted Compliance Ledger(DCL)?