Calculate length limition of CSEC

[Keane]

Hi everyone

I'm working on S32K146 with S32DS 3.4 now, but I found some issues about CSEC.

Is there any length limitation of CMAC calculation by Csec_GenerateMacAddrMode?

Can the calculation length be beyond 0x60000?

Length 0x5FFFF, it can work.

Length 0x60000, it can work.

Length 0x60001, it can't work.

But it can work by Csec_GenerateMac.

I will appreciate it if someone can help me to solve those problems.
Best regards.

[ZEROOO]

Hi @Keane 

    When you use the CSEC_DRV_GenerateMACAddrMode function, can you process data of 0x60000 bytes in one call.Has the specific maximum data length been measured?

Best wishes!

[lukaszadrapa · Accepted solution]

Hi @Keane 

yes, there is a limitation:

 In case of S32K146, there are two 512KB read partitions in program flash:

So, you just crossed the partition.

Regards,

Lukas

[Keane]

Hi Lukas

Thanks for your reply . It really helps me a lot.

Best regards,

Keane