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[pentest] Update EDN SCA tests #25619

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This commit updates the EDN SCA tests to use asm instead of C code such that the SCA target is more accurate.

@nasahlpa nasahlpa requested a review from a team as a code owner December 12, 2024 05:21
@nasahlpa nasahlpa requested review from HU90m and removed request for a team and HU90m December 12, 2024 05:21
@nasahlpa nasahlpa added the CherryPick:earlgrey_1.0.0 This PR should be cherry-picked to earlgrey_1.0.0 label Dec 12, 2024
This commit updates the EDN SCA tests to use asm instead of C
code such that the SCA target is more accurate.

Signed-off-by: Pascal Nasahl <[email protected]>
Co-authored-by: Alexander Wagner <[email protected]>
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Thanks for the PR @nasahlpa . The code looks good to me but I have a question regarding the analysis method:

Before this PR we had a fixed-vs-random command wheres with this PR we only have the command for measuring the transmission of one word over the bus. I assume we then do the trace grouping during the analysis based on individual subwords or even bits we want to analyze. Can you comment on this please?

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Yes exactly, the analysis needs to be done at the host site. The reason for this change is that the lab decided that this will fit their setup better.

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