Constant-Time Memory Comparison

[BillyBobJoe]

Hi,

I am looking for a constant-time memory comparison is a function that compares memory for equality in a fixed amount of time, regardless of the data's content. I am sure there is something is the encryption library but I am not able to find it.

Anyone with any advice/guidance?

Billy..

[Benjamin]

Hi,
I could not find anything in Zephyr. You can check the ocrypto_constant_time_equal() function in the Oberon crypto library, but it is probably better to write your own version.

Regards,
Benjamin

[BillyBobJoe]

i will have look at this, thanks