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45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package qemu
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import (
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"crypto"
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"github.com/edgelesssys/constellation/v2/internal/attestation/vtpm"
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"github.com/edgelesssys/constellation/v2/internal/oid"
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"github.com/google/go-tpm/tpm2"
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)
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// Validator for QEMU VM attestation.
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type Validator struct {
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oid.QEMU
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*vtpm.Validator
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}
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// NewValidator initializes a new QEMU validator with the provided PCR values.
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func NewValidator(pcrs map[uint32][]byte, enforcedPCRs []uint32, log vtpm.AttestationLogger) *Validator {
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return &Validator{
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Validator: vtpm.NewValidator(
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pcrs,
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enforcedPCRs,
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unconditionalTrust,
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func(attestation vtpm.AttestationDocument) error { return nil },
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vtpm.VerifyPKCS1v15,
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log,
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),
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}
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}
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// unconditionalTrust returns the given public key as the trusted attestation key.
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func unconditionalTrust(akPub, instanceInfo []byte) (crypto.PublicKey, error) {
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pubArea, err := tpm2.DecodePublic(akPub)
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if err != nil {
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return nil, err
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}
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return pubArea.Key()
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}
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