Add the ability to use persistent handles for IDevID and IAK rather than regenerating, and add auth values for them

[Isaac-Matthews]

This PR adds into the config the ability to specify handles and auth values for IDevID and IAK keys. The auth values function in the same way as the TPM ownerpassword in that they can be hex values.

The new config options are:

idevid_password = ""
idevid_handle = ""

iak_password = ""
iak_handle = ""

[Isaac-Matthews]

/packit retest-failed

[ansasaki]

I see you declared this method as public, but it is currently only used to get the handles for IDevID and IAK keys.

Do you see future usage of this in other use case? If not, could you make it private by removing the pub keyword?

[Isaac-Matthews]

I thought it could be a useful method but did not have a specific use-case in mind. I'll change to private and we can always change back to public if we want to use it in future.

[ansasaki]

Since you are adding new configuration options, do not forget to make a PR to add the configuration files to the configuration upgrade template.

I'll create an issue when we merge this to remind you.

[ansasaki]

@Isaac-Matthews Could you please rebase on top of current master?

[codecov]

Codecov Report

Attention: Patch coverage is 28.36879% with 101 lines in your changes are missing coverage. Please review.

Project coverage is 61.26%. Comparing base (2f7b3ad) to head (562641c).
Report is 25 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
e2e-testsuite	61.26% <28.36%> (+3.67%)	⬆️
upstream-unit-tests	61.26% <28.36%> (+10.25%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
keylime-agent/src/config.rs	87.48% <86.95%> (-0.02%)	⬇️
keylime-agent/src/main.rs	26.74% <0.00%> (+0.72%)	⬆️
keylime/src/tpm.rs	66.63% <0.00%> (+0.44%)	⬆️

... and 7 files with indirect coverage changes

[ansasaki]

Thank you for the contribution!

I created RedHat-SP-Security/keylime-tests#587 to track the end-to-end test creation