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Add TRNG checkup in devicekey #9302

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Merged
merged 1 commit into from
Jan 24, 2019
Merged

Add TRNG checkup in devicekey #9302

merged 1 commit into from
Jan 24, 2019
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yossi2le
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@yossi2le yossi2le commented Jan 9, 2019

Description

To eliminate the case in which TRNG return success but actually fail and did nothing I have added a check that test if the device key buffer has changed after calling entropy function.
This checkup is not a bulletproof mechanism but we believe that it should decrease the chances for such an error in substantially.

This PR is dependant on #9278

Pull request type

[x] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

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@boomer41
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boomer41 commented Jan 9, 2019 •
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Actually I believe when such a case happens, the TRNG itself is broken. When it fails, but still returns success, the TRNG itself has a very big bug.

But nonetheless, adding such a check can be quite useful when a bug in the hal layer occurs.

@yossi2le yossi2le changed the title Yossi add trng checkup devicekey Add trng checkup in devicekey Jan 9, 2019
@yossi2le yossi2le changed the title Add trng checkup in devicekey Add TRNG checkup in devicekey Jan 9, 2019
@ciarmcom ciarmcom requested review from a team January 9, 2019 10:00
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ciarmcom commented Jan 9, 2019

@yossi2le, thank you for your changes.
@ARMmbed/mbed-os-storage @ARMmbed/mbed-os-maintainers please review.

davidsaada
davidsaada approved these changes Jan 9, 2019
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LGTM.

@yossi2le yossi2le force-pushed the yossi_add_trng_checkup_devicekey branch from 19b2a9c to 29c9123 Compare January 9, 2019 10:22
@cmonr
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cmonr commented Jan 9, 2019

@yossi2le Please remove the second commit in this branch by rebasing this branch instead of merging the read-only reference into this one.

I have no idea what kind of problems trying to bring this into 5.11.2 would cause with that commit, but I would wager it wouldn't be pretty.

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mbed-ci commented Jan 10, 2019

Test run: FAILED

Summary: 1 of 11 test jobs failed
Build number : 1
Build artifacts

Failed test jobs:

  • jenkins-ci/mbed-os-ci_greentea-test

Adding a test if device key buffer has changed after calling to entro…
2adf5db 
…py func. this should enable as to eliminate some rare cases when the trng fail but still return success.
@yossi2le yossi2le force-pushed the yossi_add_trng_checkup_devicekey branch from 29c9123 to 2adf5db Compare January 10, 2019 08:22
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0xc0170 commented Jan 23, 2019

CI started

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mbed-ci commented Jan 23, 2019

Test run: SUCCESS

Summary: 12 of 12 test jobs passed
Build number : 2
Build artifacts

@cmonr cmonr merged commit b0b4013 into ARMmbed:master Jan 24, 2019
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@0xc0170 0xc0170 0xc0170 approved these changes

@dannybenor dannybenor dannybenor approved these changes

@davidsaada davidsaada davidsaada approved these changes

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@yossi2le @boomer41 @ciarmcom @cmonr @mbed-ci @0xc0170 @dannybenor @davidsaada