NRF52810 Exception using AES ECB on SDK16

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Fri, 17 Feb 2023 03:15:25 GMT

Hi,

I can successfully complete the encryption and decryption by using the nRF52810 project you gave me. Thank you very much!

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Fri, 17 Feb 2023 01:10:58 GMT

Hi,

I'll give it a try. Thank you for your help.

RE: NRF52810 Exception using AES ECB on SDK16

Vidar Berg — Thu, 16 Feb 2023 12:53:30 GMT

Hi,

I have not managed to reproduce this here. I used the same example from nRF5 SDK 17.1.0 and made a new project configuration to run on the nRF52810. This configuration is included below. Can you try it and see if you get the same result?

Project to be copied to \crypto\nrf_crypto\aes\aes_all_cli:

devzone.nordicsemi.com/.../7506.pca10040e.zip

Result when tested on a 52810:

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Thu, 16 Feb 2023 01:32:13 GMT

Hi，

I tried to change the stack size to 8K, but it didn't work and was still decrypting errors when actually using it.

As for the hardware ECB, I tried it, but it didn't seem to work, and the main thing I needed was decryption, encryption just to verify the decryption was correct.

So back to the original question, why did 52810 have a calculation error in the process of encryption and decryption?

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Mon, 13 Feb 2023 12:16:47 GMT

Hello

Thank you very much for your answer. I will try it through the method you provided.

I'll start by looking at the hardware ECB encryption.

RE: NRF52810 Exception using AES ECB on SDK16

Vidar Berg — Mon, 13 Feb 2023 12:14:32 GMT

Hi,

Please try to increase your call stack size to see if it makes any difference. The call stack is 8K on the 52832 by default, while it is only 2kB on the 52810.

[quote user="ZhangMM"]I don't know how to use the hardware encryption method you mentioned.[/quote]

The ECB — AES electronic codebook mode encryption peripheral supports HW accelerated encryption, but not decryption.

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Mon, 13 Feb 2023 12:11:28 GMT

My original goal was to decrypt it with Android software.

Since we do not know much about AES of NRF52810, we will use examples\crypto\nrf_crypto\aes\aes_all_cli routine to learn.

I don't know how to use the hardware encryption method you mentioned.

RE: NRF52810 Exception using AES ECB on SDK16

Emil Lenngren — Mon, 13 Feb 2023 11:13:07 GMT

Any reason you are doing everything entirely in software instead of using the hardware ECB peripheral?

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Mon, 13 Feb 2023 03:16:15 GMT

Hi，

I tried to use 17.1.0, but the experimental result is the same as that of v16, 52832 platform is normal, 52810 platform has problems.

RE: NRF52810 Exception using AES ECB on SDK16

Zhang| — Mon, 13 Feb 2023 01:34:36 GMT

Hi，

Thank you very much for your answer. I will try to use v17.1.0.

However, why does SDK V16 have such problems? Because all our projects use v16, it may not be convenient to modify it into v17.1.0. Therefore, I need to find out the cause of such problems.

RE: NRF52810 Exception using AES ECB on SDK16

Didrik Rokhaug — Fri, 10 Feb 2023 12:02:40 GMT

Hi,

Do you see the same behavior if you try nRF5 SDK v17.1.0?

Best regards,

Didrik