Mbedtls issue when updating to NRF SDK v1.9.1

[mglettig]

Hello

I'm about to update from NRF SDK v1.8 to NRF SDK v1.9.1. We build our firmware for both NRF9160 but also for QEMU_X86 (simulation build). I noticed that since the update the function call to mbedtls_ctr_drbg_seed fails with the error code 0x34 which means MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED. We noticed that with the new version there was also a migration to mbedtls 3. That might way it is behaving different now. Any ideas how I can solve the problem? Do I somehow need to defined the entropy source for qemu_x86?

 

Kind regards,

Michael

[Elfving]

Hello Michael,

So you are saying you get the same issue when only building for the nRF9160?

Regards,

Elfving

[mglettig]

Yes it looks like the same problem occurs with nRF9160.

[Elfving]

I see. I assume you are using the modem, and getting entropy from CryptoCell? Are you using SPM?

Are there any other changes you have made to the project while porting it from NCS 1.8 to 1.9.1?

Regards,

Elfving