AES Key import returns HSE_SRV_RSP_NOT_ALLOWED

[kerti1]

Hi,

1.I had an issue while exporting the AES key. First I defined my AES key in a global variable and imported into the RAM. Then I tried exporting the key from that location. I am sure that RAM keys can be exported. But I am getting an error as HSE_SRV_RSP_NOT_ALLOWED. 

Please find the code snippet for export issue

2. What exactly the SHE keys are for. Can I change my MASTER_Key using the keytype SHE key.

[lukaszadrapa]

Hi @kerti1 

1. Symmetric keys can be exported only in encrypted form, so you need to select cipher keyhandle:

lukaszadrapa_0-1749542670180.png

 2. HSE emulates SHE commands for users who want to comply with SHE specification 1.1. It's quite old specification issued by HIS members in 2009. 

MASTER_ECU_KEY can be updated using standard secure key update protocol with knowledge of original MASTER_ECU_KEY. 

Regards,

Lukas