RE: Infineon Optiga TrustX key derivation

ozanoner — Tue, 11 Jun 2019 08:03:28 GMT

Here is the answer from the Infineon side

RE: Infineon Optiga TrustX key derivation

ozanoner — Fri, 07 Jun 2019 14:41:24 GMT

Yes, contacted. The developer of the lib replied me with examples here and here. I am working on them. I believe it is about the fw version on the module but not sure yet. weird thing is that there is an inconsistency between the nrf52-v3.0 sdk example and the example from infineon about the fw version index. nrf-sdk example uses

if (info[25] == 0x10 && info[26] == 0x48)

but infineon example is:

if ((coprocessor_uid[26] < 11) || (coprocessor_uid[27] < 18))

while debugging, I see this:

so not sure which one is true. nrf-sdk example is consistent with the reply from the module at least, but in this case it means my module doesn't support this functionality which contradicts with the datasheet of optiga trustx :( I am on it. I will share my findings here. I appreciate if you have any comment or idea.

RE: Infineon Optiga TrustX key derivation

haakonsh — Fri, 07 Jun 2019 11:38:31 GMT

Have you talked to Infineon?