Currently only available on Azure CVMs.
* Get the public attestation key from the TPM.
* Get the snp report from the TPM.
* Get the VCEK and ASK certificate from the metadata api.
* Verify VCEK using hardcoded root key (ARK)
* Verify SNP report using VCEK
* Verify HCLAkPub using SNP report by comparing
AK with runtimeData
* Extend unittest
Co-authored-by: Thomas Tendyck <51411342+thomasten@users.noreply.github.com>
Co-authored-by: Daniel Weiße <dw@edgeless.systems>
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