nRF91 questions about credentials

RE: nRF91 questions about credentials

PopradiArpad — Thu, 09 Jul 2020 11:14:48 GMT

Hi Kenneth,

thank you for your response.

With kind regards,

Árpád

RE: nRF91 questions about credentials

Kenneth — Thu, 09 Jul 2020 09:32:35 GMT

Looks like the "the unspecified 6-er" is not used for anything at the moment, but it may used in future, so I suggest to leave it untouched.

Best regards,
Kenneth

RE: nRF91 questions about credentials

PopradiArpad — Fri, 03 Jul 2020 14:59:50 GMT

Hi Martin,

thank you for your answer. This strange repeating digests are even at you so it can not do harm :)

I am new to LTE and nRF9160 and accordingly paranoid :)

This credential with the unspecified 6-er tag is some trash? Or used internally?

Is it ok to delete it?

Regards,

Árpád

RE: nRF91 questions about credentials

Martin Lesund — Fri, 03 Jul 2020 14:41:26 GMT

Response syntax for read operation:

%CMNG: <sec_tag>,<type>[,<sha>[,<content>]]

It is the SHA that has this "repeating" data.

Once you delete a credential it is gone.

To write the credential again you could use the command:

The following command example writes the client certificate:

AT%CMNG=0,567890,1,"
-----BEGIN CERTIFICATE-----
MIIBc464...
...bW9aAa4
-----END CERTIFICATE-----”
OK

Or you can use the "Certificate Manager" in LTE Link Monitor, just by dragging and dropping the .json file e.g. gathered from nRF Cloud. (example)

3.
I will check internally why an un-specified type can be shown.

I managed to write to that unspecified type as well:

For now please only use the specified Types

RE: nRF91 questions about credentials

PopradiArpad — Fri, 03 Jul 2020 14:11:00 GMT

Hi Martin,

I use

AT+CGMR

mfw_nrf9160_1.2.0

the latest firmware.

Do you have answers for the questions?

Regards,

Árpád

RE: nRF91 questions about credentials

Martin Lesund — Fri, 03 Jul 2020 13:39:05 GMT

Hi Árpád,

Please make sure that you are running the latest MFW: https://www.nordicsemi.com/Products/Low-power-cellular-IoT/nRF9160/Download#infotabs

e.g.

This can be read out by AT+CGMR

(mfw 1.2.1 is not yet public)

These certificates are stored in the modem flash, so changing the application .hex does not change the certificates.

Please read the examples down in the doc: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fref_at_commands%2FREF%2Fat_commands%2Fmob_termination_ctrl_status%2Fcmng_set.html&cp=2_1_3_27_0

on how you can read out the specific certificates.

When you list the certificates it will look different compared to when you actually read them out.