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690b50b29d
* Remove unused package * Add Go package docs to most packages Signed-off-by: Daniel Weiße <dw@edgeless.systems> Signed-off-by: Fabian Kammel <fk@edgeless.systems> Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com> Co-authored-by: Paul Meyer <49727155+katexochen@users.noreply.github.com> Co-authored-by: Fabian Kammel <fk@edgeless.systems>
47 lines
1.5 KiB
Go
47 lines
1.5 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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/*
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This package deals with the low level attestation and verification logic of Constellation nodes.
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General tpm attestation code that is not subjective to a single platform should go into the vtpm package.
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Since attestation capabilities can differ between platforms, the attestation code should go into a subpackage for that respective platform.
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We commonly implement the following two interfaces for a platform:
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// Issuer issues an attestation document.
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type Issuer interface {
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oid.Getter
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Issue(userData []byte, nonce []byte) (quote []byte, err error)
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}
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// Validator is able to validate an attestation document.
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type Validator interface {
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oid.Getter
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Validate(attDoc []byte, nonce []byte) ([]byte, error)
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}
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Attestation code for new platforms needs to implement these two interfaces.
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*/
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package attestation
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import (
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"github.com/edgelesssys/constellation/v2/internal/crypto"
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)
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const (
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// clusterIDContext is the value to use for info when deriving the cluster ID.
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clusterIDContext = "clusterID"
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// MeasurementSecretContext is the value to use for info
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// when deriving the measurement secret from the master secret.
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MeasurementSecretContext = "measurementSecret"
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)
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// DeriveClusterID derives the cluster ID from a salt and secret value.
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func DeriveClusterID(secret, salt []byte) ([]byte, error) {
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return crypto.DeriveKey(secret, salt, []byte(crypto.DEKPrefix+clusterIDContext), crypto.DerivedKeyLengthDefault)
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}
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