why RSA RsaPkcs1v15VerSrv take too long time

[zhurui]

When I use RsaPkcs1v15VerSrv(HSE_HASH_ALGO_SHA2_512) to check 64K code, it take 500ms(response is OK), but I would like to use it to do security-boot, it can't be accept now,

does there configuration should i do?

My configuration:

PLL = 80MHz，HW firmware HSE_FW_S32K344_0_2_55_0

The data sheet says that RSA only need 16ms

Hash less 1.6ms

[zhurui]

You are right, I change the hash to SHA-256, time is OK, so S32K3 hardware can support "HW accelerated version",  or another firmware?

We use  standard HSE Firmware.

[lukaszadrapa]

There's no HW support in the device, so it can't be solved by different firmware.

[lukaszadrapa · Accepted solution]

Hi @zhurui 

Here's the reason:

There's only SW support for SHA512, so it can take pretty long time. To speed it up, it would be necessary to use HW accelerated version of the hash.

Regards,

Lukas