[Security] Get UID when load keys

Gideon — Tue, 21 May 2024 07:50:36 GMT

Dear NXPs:

IC:S32K146

sample:csec_keyconfig_s32k146 in SDK S32DS

Phenomenon:
/* Extracts the UID. */
bool getUID(uint8_t *uid) When I use this function, I step into the inside of the function and when calling
When stat = CSEC_DRV_GetID(challenge, uid, &sreg, mac);, the returned mac values are all 0, but the uid is correct. Since the mac values are all 0, execute the statement stat = CSEC_DRV_VerifyMAC(CSEC_RAM_KEY, verif, 256U, mac , 128U, &verifStatus, 1U);, the verifStatus value is false.
question:
Although the return value of bool getUID(uint8_t *uid) is false, it does not affect subsequent load key processing, but I would like to know why the CSEC_DRV_GetID(challenge, uid, &sreg, mac) interface, mac is all 0?

Re: [Security] Get UID when load keys

lukaszadrapa — Wed, 22 May 2024 10:22:35 GMT

Hi @Gideon

I guess that this is the problem:

Regards,

Lukas

topic Re: [Security] Get UID when load keys in S32K

[Security] Get UID when load keys

Re: [Security] Get UID when load keys