CAAM HASH algorithm performance Question

[zhongyue_li]

Dear NXP engineers:

G'Day.

I am working on caam hash performance test on i.MX8 board.

and there is weird result that sha1 performance is lower than sha256's.

As far as i know, the computation of sha256 algorithm is more complicated that sha1's,

so i want to know why sha1 hash time is longer than sha256's.

I know the hash time is depend on the algorithm implementation.

Following is the test result, please help to confirm if it is normal data of test result?

Hash SHA1: 16 Mega byte data takes 94 milliseconds.

----------------------------------------------------

Job ring parameters:

g_job->dsc[0]:b0800007
g_job->dsc[1]:8441000d
g_job->dsc[2]:24540000
g_job->dsc[3]:84ef0a40
g_job->dsc[4]:1000000
g_job->dsc[5]:54200014
g_job->dsc[6]:81edef00

-----------------------------------------------------

Hash SHA256: 16 Mega byte data takes 81 milliseconds.

------------------------------------------------------

Job ring parameters:

g_job->dsc[0]:b0800007
g_job->dsc[1]:8443000d
g_job->dsc[2]:24540000
g_job->dsc[3]:84ef0a40
g_job->dsc[4]:1000000
g_job->dsc[5]:54200020
g_job->dsc[6]:81edef00

-----------------------------------------------------

Looking forward to you reply.

Thanks a bunch.

[Yuri]

Hello,

  What i.MX8 device / board is used in the case? 

Regards,

Yuri.

[zhongyue_li]

Hello, Yuri,

I test these cases on i.mx8qxp b0 board with android os.

I use jobring3 in Trustzone to invoke CAAM hash function. 

Could you help check my test result?

Thanks a million.

[Yuri]

Hello,

   which TEE they used to test SHA performance? OP-TEE or Trusty OS?

Regards,

Yuri.

[zhongyue_li]

Hello Yuri,

I test the case with Trusty OS.

Thank you.

[Yuri]

Hello,

   preliminary considerations - it is possible to get SHA256 is faster than SHA1 when using CAAM,

depending on the optimization method of the SHA algorithms.

Regards,

Yuri.

[zhongyue_li]

Thanks for checking it,

so when can i get a exact point that SHA256 is faster than SHA1 when using CAAM?

Have a nice day.

[Yuri]

Hello,

  app team  tried the SHA1 and SHA256 in Trusty OS with input data of 4k bytes.

It is shown that SHA256 is faster, than SHA1.  

  Note: It is recommended to use SHA256 -  as it is more secure than SHA1.

Regards,

Yuri.

[zhongyue_li]

Got it.

Thank you very much for helping check this issue.

I do appreciate it.

Best wishes.