topic Re:AES-NI functions like SubBytes, KeyAddition etc in Intel® Integrated Performance Primitives

AES-NI functions like SubBytes, KeyAddition etc

Sergej_Mamberger — Fri, 19 May 2023 09:48:50 GMT

Hello everyone,
I have read the whitepaper on AES-NI where AESENC used the typical Rijndael Functions SubBytes, MicColumns and so on. However, I cannot find a reference of the implementation to these functions. I would like to study them more so it would be very helpful if someone could tell me where to find them?

More precisely, I would like to get it as assembler instructions in order to compute the cycles for each of these functions.

Thank you in advance.

Re:AES-NI functions like SubBytes, KeyAddition etc

NoorjahanSk_Intel — Tue, 23 May 2023 10:11:55 GMT

Hi,

Thanks for posting in Intel Communities.

Please refer to below link to get more details on implementation of the functions.

https://www.intel.com/content/www/us/en/docs/ipp-crypto/developer-reference/2022-2/rijndael-functions.html

Thanks & Regards,

Noorjahan.

Re: AES-NI functions like SubBytes, KeyAddition etc

Sergej_Mamberger — Tue, 23 May 2023 10:46:35 GMT

Hi @NorjaahanSk_Intel,
Thank you for the reply. I have already seen this reference and I could not find the Information I was looking for. Where on this reference are you able to find the AES-NI Implementations for SubBytes and so on?

Probably I need to explain my problem a bit more:
https://www.intel.com/content/dam/doc/white-paper/advanced-encryption-standard-new-instructions-set-paper.pdf

States that AESENC, used by AES-NI, performes the following operations:

AESENC xmm1, xmm2/m128 
Tmp := xmm1  
Round Key := xmm2/m128  
Tmp := ShiftRows (Tmp)  
Tmp := SubBytes (Tmp)   
Tmp := MixColumns (Tmp)  
xmm1 := Tmp xor Round Key

What I want to find out is the Implementation of the functions ShiftRows, SubBytes and MixColumns.

Re: Re:AES-NI functions like SubBytes, KeyAddition etc

Sergej_Mamberger — Tue, 23 May 2023 10:47:22 GMT

Hi, I have replied seperately to your answer. Please view below. Sorry.

Re:AES-NI functions like SubBytes, KeyAddition etc

NoorjahanSk_Intel — Mon, 29 May 2023 05:49:22 GMT

Hi,

All the IPP crypto source code is public released at Intel Github.

Please refer to the below link for more details on assembler instructions:

https://github.com/intel/ipp-crypto/tree/develop/sources/ippcp/asm_intel64

Thanks & Regards,

Noorjahan.

Re:AES-NI functions like SubBytes, KeyAddition etc

NoorjahanSk_Intel — Tue, 06 Jun 2023 06:20:34 GMT

Hi,

We haven't heard back from you. Could you please provide an update on your issue?

Thanks & Regards,

Noorjahan.

Re: Re:AES-NI functions like SubBytes, KeyAddition etc

Sergej_Mamberger — Tue, 06 Jun 2023 07:46:11 GMT

Hello,
My apologies. I have not found the code I wanted to. But it doesn't matter, since I found another way to solve my problem. Thank you regardless

Kind regards,
Sergej

Re:AES-NI functions like SubBytes, KeyAddition etc

NoorjahanSk_Intel — Wed, 14 Jun 2023 09:08:47 GMT

Hi,

Glad to know that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks & Regards,

Noorjahan.