Using modem JWT to encode arbitrary payload

RE: Using modem JWT to encode arbitrary payload

Øyvind — Tue, 18 Jun 2024 10:53:29 GMT

The current support we have is only AT%JWT, and these JWT tokens generated by the modem, do not support adding any custom information unfortunately. Zephyr has JWT and JSON libraries as well, however, these do not utilize the modem secure tags.

I will add this as a feature request. Unfortunately no timeline available for when or if this will be supported.

Kind regards,
Øyvind

RE: Using modem JWT to encode arbitrary payload

proto_steve — Fri, 14 Jun 2024 18:58:11 GMT

In talks with our customer, we can de-escellate this issue, as we have a work around. However, this would be a REALLY nice to have feature, and if it already exists I'd like to know about it. By way of example, the python jwt library lets you stringify anything and pass it in with a cert for encryption.

RE: Using modem JWT to encode arbitrary payload

proto_steve — Fri, 14 Jun 2024 16:42:30 GMT

We're on 1.3.5 currently.

RE: Using modem JWT to encode arbitrary payload

Øyvind — Fri, 14 Jun 2024 07:49:55 GMT

Hello,

I will need to discuss this with out nRF91-series developers with regards to what is possible using the Creating JWT (AT%JWT) command or the Modem JWT library.

What modem FW are you running on your device? Assuming mfw 1.3.x

Kind regards,
Øyvind

RE: Using modem JWT to encode arbitrary payload

proto_steve — Thu, 13 Jun 2024 19:35:30 GMT

I guess while I have someone with nrf/JWT experience reading, I also need to decrypt a JWT against the pub cert in one of the sec tags. I see no library support for that, am I wrong?