feat(kms): add GetAttestationInfo RPC to onboard service#503
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Adds a new GetAttestationInfo RPC endpoint to the Onboard service that returns the real device_id, mr_aggregated, os_image_hash, and mr_system values needed for on-chain KMS authorization registration. The endpoint verifies the TDX attestation quote via PCCS to obtain the real platform device identifier (ppid), which is required to compute the correct device_id (SHA256 of ppid). This differs from the serial log values which use an empty ppid. Also updates the onboard web UI to auto-load and display the attestation info on page load.
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Summary
GetAttestationInfoRPC to the Onboard service that returns the realdevice_id,mr_aggregated,os_image_hash,mr_system, andattestation_modeneeded for on-chain KMS authorizationdevice_id = SHA256(ppid)— unlike the serial log which showsSHA256("") = e3b0c442...due toAttestation<()>having no ppidScreenshot
Onboard web UI on GCP TDX Confidential VM:
Motivation
When onboarding a new KMS instance, operators need to register the correct
device_id,mr_aggregated, andos_image_hashon-chain before the source KMS will authorize key transfer. Previously there was no way to obtain these real values from the KMS itself — the serial log values were incorrect fordevice_id.Test plan
cargo check -p dstack-kmscompiles0xprefix for easy copy to on-chain registration