Custom HSM in azure c sdk

[burkulesomesh43]

Hi All,

I'm using azure c sdk LTS_03_2024 for development. I've used provisioning_client_sample and able to successfully register device on IoT hub with X.509 certs and group enrollment on my ubuntu system (X86).

while working on this, I observed custom_hsm_sample is tightly coupled with provisioning_client_sample. I'm running this samples now on Cyclone V FPGA - ARM ARCH 32 bit embedded device. ( all the azure c sdk libs are crosscompiled to 32 bit arm arch ). while executing I'm getting below error.

Provisioning API Version: 1.13.0 Error: Time:Tue Nov 26 12:16:24 2024 File:/usr/src/debug/azure-iot-sdk-c/1.2.10-r0/git/provisioning_client/adapters/hsm_client_x509.c Func:hsm_client_x509_get_common_name Line:159 Registration ID was not configured. Error: Time:Tue Nov 26 12:16:24 2024 File:/usr/src/debug/azure-iot-sdk-c/1.2.10-r0/git/provisioning_client/src/prov_auth_client.c Func:load_registration_id Line:142 Failed getting common name from certificate Error: Time:Tue Nov 26 12:16:24 2024 File:/usr/src/debug/azure-iot-sdk-c/1.2.10-r0/git/provisioning_client/src/prov_auth_client.c Func:prov_auth_get_registration_id Line:374 Failed loading registration key Error: Time:Tue Nov 26 12:16:24 2024 File:/usr/src/debug/azure-iot-sdk-c/1.2.10-r0/git/provisioning_client/src/prov_device_ll_client.c Func:Prov_Device_LL_Register_Device Line:944 failure: Unable to retrieve registration Id from device auth. Registering failed with error: 10

Cyclone V FPGA doesn't support any hardware security. specifically Hardware Security Module(HSM). I want to confirm that, is custom_hsm_sample uses hardware security? or its just a software component?

can we use provisioning_client_sample without using custom_hsm? if so, could you please share reference code.

Thanks in advance.

• Somesh